CN211826484U

CN211826484U - Multi-line laser module, laser radar and movable platform

Info

Publication number: CN211826484U
Application number: CN202020022256.3U
Authority: CN
Inventors: 张朝; 熊小刚; 杨子龙
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-10-30
Anticipated expiration: 2030-01-06

Abstract

The embodiment of the application provides a multi-line laser module, a laser radar and a movable platform. The multi-line laser module includes: a laser device disposed on the printed circuit board; a plurality of switching elements disposed on the printed circuit board, respectively coupled to the laser device, for controlling the laser device to emit a plurality of laser beams; at least one capacitor element arranged on the printed circuit board, coupled to the laser device, and used for driving the laser device to emit a plurality of laser beams; wherein the laser device comprises a plurality of lasers forming at least two discharge loops on the printed circuit board, each discharge loop comprising: at least one first laser of the plurality of lasers, a switching element coupled to the at least one first laser, and a capacitive element; the difference value of the loop areas corresponding to any two discharge loops is smaller than a preset value, so that the difference value between the loop equivalent inductances corresponding to any two discharge loops is smaller than the preset value.

Description

Multi-line laser module, laser radar and movable platform

Technical Field

The utility model relates to a laser instrument technical field especially relates to a multi-line laser instrument module, laser radar and movable platform.

Background

In the fields of laser radar, laser ranging and the like, because products are directly used in real life scenes, and laser has the risk of directly entering human eyes, the energy value of laser emission which cannot exceed safety regulations is regulated, and the human body cannot be hurt even when the laser enters the human eyes. Therefore, when designing a laser emission scheme, the peak power of light emission needs to be increased as much as possible on the premise of being smaller than the safety limit, so as to realize a longer detection distance.

However, some multi-line laser modules in the prior art are limited by packaging conditions or design conditions, so that the multi-line laser modules have poor consistency in the distance detection process, thereby reducing the accurate reliability of the detection data of the laser and being not beneficial to the realization of a longer detection distance by the laser.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a multi-line laser ware module, laser radar and movable platform to solve above-mentioned technical problem.

In a first aspect, an embodiment of the present invention provides a multi-line laser module, including:

a laser device disposed on the printed circuit board;

a plurality of switching elements disposed on the printed circuit board, respectively coupled to the laser devices, for controlling the laser devices to emit a plurality of laser beams;

at least one capacitor element disposed on the printed circuit board, coupled to the laser device, for driving the laser device to emit a plurality of laser beams;

wherein the laser device comprises a plurality of lasers forming at least two discharge loops on the printed circuit board, each discharge loop comprising: at least one first laser of the plurality of lasers, a switching element and a capacitive element coupled to at least one of the first lasers; the difference value of the loop areas corresponding to any two discharge loops is smaller than a preset value, so that the difference value between the loop equivalent inductances corresponding to any two discharge loops is smaller than the preset value.

Furthermore, a plurality of the lasers are arranged on the substrate side by side.

Further, the plurality of switching elements and the at least one capacitor element are uniformly disposed around the laser device.

Further, the plurality of lasers includes two lasers; at least one capacitor element comprises a first capacitor element, the first capacitor element is arranged in the middle of a first area, the first area is arranged on one side of the two lasers, and the two switch elements coupled with the two lasers are respectively arranged on two sides of the first capacitor element.

Further, the plurality of lasers includes six lasers; at least one of the capacitive elements comprises at least one of: six capacitive elements, twelve capacitive elements, eighteen capacitive elements.

Furthermore, the six lasers are arranged on a substrate, at least one capacitor element is uniformly arranged at the top corner of the substrate, and a plurality of switch elements coupled with the lasers are uniformly arranged around the substrate; or,

the six lasers are arranged on the substrate, the switching elements coupled with the lasers are uniformly arranged at the top corners of the substrate, and at least one capacitive element is arranged around the substrate.

Further, a plurality of the switching elements are MOS transistors.

Furthermore, the substrate is provided with a via hole for connecting to the printed circuit board.

Furthermore, a reflecting mirror for reflecting the laser beams is arranged on one side of the lasers, and the reflecting mirror is arranged on the substrate.

Further, a cap for protecting the plurality of lasers is disposed on the substrate.

Further, the laser device is arranged on one surface of the printed circuit board, and a heat dissipation member is arranged on the other surface of the printed circuit board.

Further, a distance between at least one of the capacitive elements and an adjacent element satisfies a preset distance condition, and the adjacent element includes at least one of: a capacitor element, a switching element, and a laser; so that the main discharge loop of at least one of the at least two discharge loops takes the plurality of lasers as the center of a circle and is uniformly distributed around the plurality of lasers.

Further, the laser is a pulse laser diode grain.

Further, a plurality of the lasers are packaged together.

Furthermore, a plurality of the switch elements and at least one of the capacitor elements are distributed on both sides of the printed circuit board or only on one side of the printed circuit board.

Further, at least one of the capacitive elements corresponds to a plurality of discharge loops.

Further, the positions of a plurality of the switching elements on the printed circuit board are determined by the positions of pads of a plurality of the lasers;

the position of at least one of the capacitive elements on the printed circuit board is determined by the position of pads of a plurality of the lasers.

Furthermore, a plurality of included angles are formed between the laser beams emitted by the lasers and the plane where the printed circuit board is located.

Further, the plurality of lasers emit light in sequence according to the position sequence of the plurality of lasers.

In a second aspect, an embodiment of the present invention provides a laser radar, including:

the controller is in communication connection with the multi-line laser module and is used for controlling the multi-line laser module to emit laser beams;

the multi-line laser module includes:

a laser device disposed on the printed circuit board;

Further, a plurality of the switching elements are Mos tubes.

Furthermore, a plurality of laser patches are packaged on one surface of the printed circuit board, and a heat dissipation piece is arranged on the other surface of the printed circuit board.

Further, the laser is a pulse laser diode grain.

Further, a plurality of the lasers are packaged together.

In a third aspect, an embodiment of the present invention provides a movable platform, including:

a platform body;

a multi-line laser module disposed on the platform main body; the multi-line laser module includes:

a laser device disposed on the printed circuit board;

Further, a plurality of the switching elements are Mos tubes.

Further, the laser is a pulse laser diode grain.

Further, a plurality of the lasers are packaged together.

The embodiment of the utility model provides a multiline laser module, laser radar and movable platform can guarantee the accurate reliability that the laser instrument surveyed to also be favorable to the laser instrument to realize farther detection distance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of a multi-line laser module according to an embodiment of the present invention;

fig. 2 is a schematic timing diagram corresponding to a multi-line laser module according to an embodiment of the present invention;

fig. 3 is a schematic layout diagram of a base pad on a ceramic substrate of a multi-line laser device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a multi-line laser module according to an embodiment of the present invention;

fig. 5 is a top view of a multi-line laser module according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of the multi-line laser module of FIG. 5;

fig. 7 is a schematic diagram of the wiring of the corresponding main discharge loop of each laser unit on the circuit board according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a stacked design of a multi-line laser module on a printed circuit board according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a laser radar according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a movable platform according to an embodiment of the present invention.

In the figure, the position of the upper end of the main shaft,

100. a ceramic substrate;

101. an N-pole bonding pad;

102. a P-pole bonding pad;

103. no electrical property pad;

104. a substrate;

105. a mirror;

106. a pipe cap;

200. a controller;

201. a laser;

202. a switching element;

203. a capacitive element;

204. a laser device;

901. a controller;

902. a multi-line laser module;

1001. a platform body;

1002. a multi-line laser module.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, the terms "mounted," "coupled," "connected," "fixed," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection. It will be understood that when an element is referred to as being coupled to another element, it can be directly or indirectly electrically connected to the other element. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present invention.

The terms "comprises" and "comprising," and any variations thereof, in the description and claims of embodiments of the present invention, are intended to cover non-exclusive inclusions, e.g., a process or an apparatus that comprises a list of steps is not necessarily limited to those structures or steps expressly listed, but may include other steps or structures not expressly listed or inherent to such process or apparatus. Furthermore, in the description of the embodiments of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below may be combined with each other without conflict between the embodiments.

In order to facilitate understanding of the technical solutions of the embodiments of the present invention, the working principle of the multi-line Laser module is first described by taking the multi-line Laser module (six-line Laser module) including six lasers (for example, including six Pulsed Laser Diodes (PLDs)), however, those skilled in the art can understand that the solutions of the multi-line Laser module including other numbers of lasers all fall within the protection scope of the present invention without departing from the spirit and the basic principles of the present invention. Specifically, as shown in fig. 1 to 2, some of the driving circuits of the multi-line laser module are only shown, and the driving circuits of the other three lasers are the same as and parallel to the driving circuits of the three lasers. Specifically, the multi-line laser module includes:

the functional circuit is used for storing energy, finally charges the energy in the electric capacity through the sequential control adjustment to guarantee the normal work of the drive circuit of whole multi-line laser module, include: an inductor L1 connected in series with the power supply, and a diode D10 coupled to the inductor L1, wherein the inductor L1 is connected to the cathode of the diode D10, and the anode of the diode D10 is grounded;

a drive circuit for laser D3, comprising: the laser comprises a power supply, an inductor L1 connected in series with the power supply, a diode D1 coupled with the inductor L1, a MOS tube Q1 coupled with the diode D1, a diode D2 and a laser D3, wherein the diode D1 is respectively connected with the drain of the MOS tube Q1 and the cathode of the laser D3, the anode of the laser D3 and the diode D2 are simultaneously connected with a capacitor C1, and the other end of the capacitor C1 and the source of the MOS tube Q1 are respectively grounded;

a drive circuit for laser D6, comprising: the power supply, an inductor L1 connected in series with the power supply, a diode D4 coupled with the inductor L1, a MOS transistor Q2 coupled with the diode D4, a diode D5 and a laser D6; the diode D4 is respectively connected with the drain electrode of the MOS tube Q2 and the cathode of the laser D6, the anode of the laser D6 and the diode D5 are simultaneously connected with a capacitor C1, and the other end of the capacitor C1 and the source electrode of the MOS tube Q2 are respectively grounded;

a drive circuit for laser D9, comprising: the laser comprises a power supply, an inductor L1 connected in series with the power supply, a diode D7 coupled with the inductor L1, a MOS tube Q3 coupled with the diode D7, a diode D8 and a laser D9, wherein the diode D7 is respectively connected with the drain of the MOS tube Q3 and the cathode of the laser D9, the anode of the laser D9 and the diode D8 are simultaneously connected with a capacitor C1, and the other end of the capacitor C1 and the source of the MOS tube Q3 are respectively grounded;

the driving circuit of the laser D3, the driving circuit of the laser D6 and the driving circuit of the laser D9 are connected in parallel between the inductor L1 and the capacitor C1; it should be noted that the above-mentioned driving circuit for the laser D3, the driving circuit for the laser D6, and the driving circuit for the laser D9 are only driving circuits corresponding to three lasers in the six-line laser module, and they should further include another driving circuit for three identical lasers, which is also connected in parallel between the inductor L1 and the capacitor C1, so as to drive the six lasers in the six-line laser module to emit laser beams outwards.

A reset circuit, comprising: the power supply, and inductance L1, diode D1, diode D2, resistance R1 and MOS pipe Q4 that are connected with the power supply series connection, and are coupled with inductance L1, wherein, resistance R1 is connected with the drain-source resistance of MOS pipe Q4, and the source ground of MOS pipe Q4.

A discharge reset circuit comprising: the resistor C1, the resistor R1 and the MOS transistor Q4 are sequentially connected in series, wherein the resistor R1 is connected with the drain electrode of the MOS transistor Q4, and the source electrode of the MOS transistor Q4 is grounded.

Based on the schematic circuit diagram, the operating principle of the six-wire laser module is described, and as can be seen by referring to the timing diagram corresponding to fig. 2, the operating process of the six-wire laser module can be a reset process, a charging process, an energy transfer process, and a light emitting process. Specifically, a process of driving the laser D6 to emit a laser beam is described as an example:

resetting: at the time t4, the reset signal is pulled high, the MOS transistor Q4 is turned on, and the power supply V charges the inductor L1 through the diode D1, the diode D2, the resistor R1 and the MOS transistor Q4; at this time, if there is electricity in the capacitor C1, the discharge reset can be performed through a path formed by the capacitor C1, the resistor R1 and the MOS transistor Q4.

And (3) charging process: at time t5, the enable signal 2 is pulled high, the MOS transistor Q2 is turned on, and the power supply V charges the inductor L1 through the inductor L1, the diode D4, the MOS transistor Q2, and the inductor charging path during the reset process. At time t6, the reset signal is pulled low, and MOS transistor Q4 is turned off, and only inductor L1, diode D4, and MOS transistor Q2 remain in the charging path.

And (3) energy transfer process: at time t7, the enable signal 2 is pulled low, the MOS transistor Q2 is turned off, and the energy stored in the inductor L1 is transferred to the capacitor C1 through the diode D1 and the diode D2.

And (3) a light emitting process: at time t8, the start signal 2 is pulled high again, the MOS transistor Q2 is turned on, the voltage in the capacitor C1 drives the laser D6 to emit a laser beam through the path of the capacitor C1, the laser D6 and the MOS transistor Q2, at time t9 (at this time, light emission is finished), the start signal 2 is pulled low, the MOS transistor Q2 is turned off, and the drive laser D6 stops emitting the laser beam.

On the basis of the above implementation principle, please refer to fig. 3. Fig. 3 is a schematic layout diagram of a base pad on a ceramic substrate of a multi-line laser device according to an embodiment of the present invention. Specifically, the laser device may include a plurality of lasers, such as the lasers D3, D6, D9, and the like described in fig. 1, for being disposed on the ceramic substrate 100, and each having a P pole and an N pole, in which case the N pole pad 101, the P pole pad 102, and the no-electrical property pad 103 are distributed on the ceramic substrate 100. The N poles of the lasers D3, D6 and D9 are connected to the N pole bonding pad 101 through metal through holes respectively; the P poles of lasers D3, D6, and D9 are connected to the P pole pad 102 by bond wires and metal vias, respectively.

It is understood that the pads (N-pole pad 101, P-pole pad 102, etc.) provided on the ceramic substrate 100 may define the arrangement positions of the components. Therefore, in one embodiment, the P-pole pad 102 may be distributed on the left and/or right side of the N-pole pad 101 according to the position of the MOS transistor and the capacitor connected to the P-pole pad 102. It should be noted that the pads 103 without electrical property distributed at the four corners of the ceramic substrate 100 of the laser device are used to make the stress on the whole laser device uniform, so that the whole laser device can be firmly soldered on the printed circuit board.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a multi-line laser module according to an embodiment of the present invention. In order to ensure that the multi-line laser module emits laser beams, a mirror 105 for reflecting the laser beams is provided on one side of the lasers 201, and the mirror 105 is provided on a substrate 104 (e.g., a ceramic substrate). In one embodiment, the laser beam is reflected by a mirror 105 such that the laser beam forms a predetermined angle with the plane of the printed circuit board. Wherein the mirror 105 may be disposed on one side of the plurality of lasers 201, for example, the mirror 105 is disposed on the left side of the lasers 201; and the capacitive elements and the switching elements connected to the plurality of lasers 201 are uniformly disposed on the other three sides (upper, lower and right sides) of the laser device, thereby effectively ensuring the stable reliability of the operation of the plurality of lasers 201.

As shown in fig. 4, a cap 106 for protecting the plurality of lasers 201 is provided on the substrate 104 in order to improve the reliability of the multi-line laser module.

Specifically, the pipe cap 106 can be disposed on the substrate 104 and sleeved outside the plurality of lasers 201 and the reflector 105, so as to effectively protect the plurality of lasers 201, ensure the cleanness of the region where the multi-line laser module is located, and prolong the service life of the multi-line laser module.

In addition to any of the above embodiments, in order to further improve the operational stability and reliability of the multi-line laser module, the laser device may be disposed on one surface (e.g., front or back surface) of the printed circuit board, and the heat sink may be disposed on the other surface of the printed circuit board.

Specifically, the plurality of lasers 201 may be attached to the front surface of the printed circuit board by using a Land Grid Array (LGA) mounting technology, and in a specific implementation, the tolerance range of a mounting process that the structure can support is + -0.05 mm; in addition, the switch element and the capacitor element are also arranged on the front surface of the PCB, and bright copper and a heat dissipation block can be arranged on the back surface area of the PCB so as to dissipate heat of the laser device through the heat dissipation block, thereby improving the working stability and reliability of the laser device.

This embodiment provides a multi-line laser module, and this multi-line laser module can guarantee that the luminous power of a plurality of lasers is unanimous in the multi-line laser module through the layout structure design on printed circuit board to each components and parts in the multi-line laser module to be favorable to realizing farther distance and detecting. Specifically, the structure of the multi-line laser module is shown in fig. 5 and 6. Fig. 5 is a top view of a multi-line laser module according to an embodiment of the present invention. Fig. 6 is a perspective view of the multi-line laser module of fig. 5. Specifically, the multi-line laser module may include:

a laser device 204 disposed on the printed circuit board;

a plurality of switching elements 202 disposed on the printed circuit board, respectively coupled to the laser device 204, for controlling the laser device 204 to emit a plurality of laser beams;

at least one capacitor element 203 disposed on the printed circuit board, coupled to the laser device 204, for driving the laser device 204 to emit a plurality of laser beams;

wherein the laser device 204 comprises a plurality of lasers 201, the plurality of lasers 201 forming at least two discharge loops on the printed circuit board, each discharge loop comprising: at least one first laser of the plurality of lasers 201, a switching element and a capacitive element coupled to the at least one first laser; the difference value of the loop areas corresponding to any two discharge loops is smaller than a preset value, so that the difference value between the loop equivalent inductances corresponding to any two discharge loops is smaller than the preset value.

It should be noted that the at least two discharge loops include one main discharge loop, that is, the laser device 204 may form at least one main discharge loop on the printed circuit board, and one main discharge loop may include one or more lasers 201 in the laser device 204; for example: the main discharge loop corresponding to laser 201 includes: a laser 201, a switching element 202 and a capacitive element 203 respectively coupled to the laser 201; the difference value of the equivalent inductances of the loops corresponding to the main discharge loops of any or at least two of the plurality of lasers 201 is smaller than a preset value.

Furthermore, according to an embodiment of the present invention, the discharge loop formed by each laser 201 may include a main discharge loop and an auxiliary discharge loop. For each discharge loop formed by the laser 201, the discharge loop formed by the laser 201 includes at least one capacitive element located in the auxiliary discharge loop in addition to the capacitive element located in the main discharge loop. Wherein the capacitive elements located in the auxiliary discharge loop corresponding to the laser 201 are also evenly distributed around the laser device 204. And, these capacitive elements in the auxiliary discharge loop are connected in parallel with the capacitive elements in the main discharge loop. In one embodiment, all capacitors have equal capacitance values and the capacitors located around the laser device 204 are in the discharge loop of the laser 201.

Furthermore, according to another embodiment of the present invention, each laser 201 may comprise only one discharge loop. When there is only one discharge loop per laser 201, the function and function of the discharge loop is the same or similar to the main discharge loop mentioned above. For brevity, no further description is provided.

The plurality of lasers 201 can be two or more lasers, in order to ensure the quality and efficiency of the overall layout of the multi-line laser module, the plurality of lasers 201 are arranged in the laser device 204, the plurality of lasers 201 can be arranged on the substrate of the laser device 204 side by side, so that the layout and wiring design of the lasers 201 is convenient, the multi-line laser module is convenient to debug and maintain, and the working stability and reliability of the multi-line laser module are guaranteed.

In addition, in the present embodiment, the specific number of the plurality of lasers 201 is not limited, and those skilled in the art may set the number according to specific application requirements and application scenarios, for example: the plurality of lasers 201 may include: two lasers, three lasers, four lasers, six lasers, eight lasers, etc., it is understood that a different number of lasers 201 may correspond to a different number of capacitive elements 203 and switching elements 202, and that the plurality of switching elements 202 and the at least one capacitive element 203 may be uniformly disposed around the laser device 204. In general, the number of the switching elements 202 is the same as that of the lasers 201 in the laser device 204, the number of the capacitor elements 203 may be smaller than, equal to, or larger than that of the lasers 201, and specifically, when the number of the capacitor elements 203 is one, the plurality of lasers 201 are coupled to the same capacitor element 203; when the number of the capacitor elements 203 is plural, the plurality of lasers 201 may be respectively coupled to the capacitor elements 203 in the respective loops, and as can be seen from the above, for the capacitor elements 203, at least one capacitor element 203 may correspond to a plurality of main discharge loops; a person skilled in the art can set the specific combination number of the lasers 201, the switching elements 202, and the capacitance elements 203 according to specific application requirements and application scenarios, as long as it can be ensured that a difference value of equivalent inductances of loops corresponding to the main discharge loops corresponding to at least two lasers 201 in the plurality of lasers 201 is less than a preset value. For example: the first loop equivalent inductance is 1H, the second loop equivalent inductance is 0.8H, at this time, the inductance difference between the two loop equivalent inductances is 0.2H, and when the preset threshold is 0.5H, the inductance difference 0.2H is smaller than the preset threshold 0.5H.

In addition, it can be understood that a person skilled in the art may determine different preset thresholds according to different application scenarios and application requirements, as long as it can be ensured that accurate determination that the loop equivalent inductance corresponding to the main discharge loop corresponding to any one laser 201 is approximately equal to the loop equivalent inductances corresponding to the plurality of main discharge loops corresponding to the other plurality of lasers 201 can be stably achieved and ensured by the set preset thresholds, and details are not described herein.

In a specific implementation, in order to ensure that a loop equivalent inductance corresponding to a main discharge loop corresponding to any one of the plurality of lasers 201 is equal to or approximately equal to a loop equivalent inductance corresponding to another main discharge loop, the loop equivalent inductance corresponding to the main discharge loop corresponding to any one of the plurality of lasers 201 may be adjusted and ensured to be equal to or approximately equal to a minimum loop area corresponding to another main discharge loop, and preferably, the loop equivalent inductance corresponding to the main discharge loop corresponding to any one of the plurality of lasers 201 is equal to or approximately equal to loop equivalent inductances corresponding to the plurality of main discharge loops corresponding to the other plurality of lasers 201. According to the utility model discloses an embodiment, can be through the adjustment and guarantee that the minimum loop area that the main discharge loop that any one laser 201 corresponds equals or approximately equals the realization with the minimum loop area that a plurality of main discharge loops that other a plurality of lasers 201 correspond. It should be noted that the minimum loop area corresponding to the main discharge loop in this embodiment refers to an area occupied by the main discharge loop on the printed circuit board and/or the package substrate; and the meaning that the minimum loop area corresponding to any one main discharge loop is approximately equal to the minimum loop area corresponding to another main discharge loop is similar to the above description. Namely, the area difference value of the minimum loop area corresponding to at least two main discharge loops is less than or equal to the preset area threshold value. According to another embodiment of the present invention, the shape of the plurality of main discharge loops is similar.

Further, for the main discharge loop composed of the capacitor 203, the switch 202, and the laser 201, when the energy of the capacitor 203 is constant, the light emission power of the laser 201 is constant, and the loss of the switch 202 is constant, the loop equivalent inductance (parasitic inductance) of the entire main discharge loop determines the shape of the entire pulse of the laser, and the larger the parasitic inductance is, the slower the rising and falling edge of the loop current after the switch 202 is turned on, the wider the equivalent full width at half maximum, and the lower the peak power of the laser 201; the smaller the parasitic inductance is, the steeper the rising and falling edge of the loop current after the switching element 202 is turned on is, the narrower the equivalent full width at half maximum is, and the higher the peak power of the laser 201 is, at this time, the laser 201 can realize the detection at a longer distance. Therefore, in order to achieve higher peak power, it is desirable for the main discharge loop that the loop equivalent inductance corresponding to the main discharge loop is smaller as better, and when the layout design of the elements in the main discharge loop is performed, the smaller the minimum loop area of the main discharge loop is as better as possible, which is further beneficial for the laser to implement detection at a longer distance.

In the multi-line laser module provided in this embodiment, the plurality of lasers 201 in the laser device 204 disposed on the printed circuit board form at least one main discharge loop, and by the layout design of the lasers 201, the switching element 202, and the capacitance element 203, the loop equivalent inductance corresponding to the main discharge loop corresponding to any one of the plurality of lasers 201 is equal to or approximately equal to the loop equivalent inductance corresponding to another main discharge loop, that is, the difference between the equivalent inductances of at least two main discharge loops is smaller than a preset value, so that the consistency of the light output powers of the plurality of lasers 201 is effectively ensured, thereby ensuring the consistency of the service lives of the plurality of lasers 201, and facilitating the realization of a longer detection distance. Note that, for each main discharge loop corresponding to the laser 201, the switching element in the main discharge loop is located closer to the capacitive element in the main discharge loop on the circuit board than the switching element in the auxiliary discharge loop.

On the basis of the above-mentioned embodiment, with continued reference to fig. 5 and fig. 6, one of the multi-line laser modules in the present embodiment may be a six-line laser module, that is, the laser device 204 may include six lasers 201; at this time, the at least one capacitive element 203 includes at least one of: six capacitive elements, twelve capacitive elements, eighteen capacitive elements.

When the at least one capacitive element 203 includes six capacitive elements 203, the six capacitive elements 203 may be uniformly distributed in the driving circuit of each laser 201, that is, one capacitive element 203 may be included in the driving circuit of each laser 201; when the at least one capacitive element 203 is twelve capacitive elements, the twelve capacitive elements are uniformly distributed in the driving circuit of each laser 201, that is, the driving circuit of each laser 201 may include two capacitive elements 203 connected in parallel; when the at least one capacitive element 203 comprises eighteen capacitive elements 203, the eighteen capacitive elements 203 may be evenly distributed in the driving circuit of each laser 201, i.e. the driving circuit of each laser 201 may comprise three capacitive elements 203 connected in parallel.

Specifically, when the number of the at least one capacitance element 203 is multiple, the multiple capacitance elements 203 may be equal-value capacitances, and uniformly surround the six lasers 201, so as to ensure that the distance between each laser 201 and the nearest capacitance element 203 is approximately equal, thereby ensuring that the loop equivalent inductance of the main discharge loop formed by each laser is relatively balanced. As shown in fig. 5, when the plurality of lasers 201 include six lasers 201, and the laser device 204 including six lasers 201 or a plurality of lasers 201 is disposed on the printed circuit board, in order to ensure stable and reliable operation of the lasers 201, the plurality of lasers 201 may be disposed on the printed circuit board through the substrate 104, that is, the plurality of lasers 201 may be disposed on the substrate 104 and disposed on the printed circuit board through the substrate 104, specifically, the substrate 104 may be a ceramic substrate, and the substrate 104 may be provided with a via hole for connecting to the printed circuit board. At this time, the at least one capacitive element 203 may be uniformly disposed at the top corner of the substrate 104, and the plurality of switching elements 202 coupled to the plurality of lasers 201 may be uniformly disposed around the substrate 104, so that the plurality of switching elements 202 and the at least one capacitive element 203 are uniformly disposed around the plurality of lasers 201, and it is effectively ensured that the loop equivalent inductance corresponding to the main discharge loop corresponding to any one laser 201 in the six lasers 201 is equal to the loop equivalent inductance corresponding to the plurality of main discharge loops corresponding to the other six lasers 201. In these embodiments, the minimum loop area of the main discharge loop is smaller, which in turn facilitates detection of greater distances by the laser.

Based on the layout structure, the multi-line laser module can be subjected to overall wiring design and stack design, as shown in fig. 5 and 6, which are layout schematic diagrams of the multi-line laser module composed of six lasers 201, twelve capacitive elements 203, and six switching elements 202. The laser device 204 is located on a printed circuit board. In the laser device 204, six lasers 201 are arranged side by side on a substrate, twelve capacitance elements 203 are uniformly provided at four vertex angles of the substrate by the substrate being arranged on a printed circuit board, and six switching elements 202 are respectively provided on three sides (upper side, lower side, and right side) of the substrate, thereby realizing that a plurality of switching elements 202 and at least one capacitance element 203 are uniformly provided around a plurality of lasers 201.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating a layout of a main discharge loop on a printed circuit board corresponding to each laser unit according to an embodiment of the present invention. After routing, the corresponding main discharge loop for each laser 201 of the six lasers 201 on the printed circuit board is shown as six turns in fig. 7. Specifically, in one main discharge loop, the charge in the capacitor reaches the bottom pad of the laser ceramic substrate from the VCC terminal through the PCB trace. And then through substrate metal vias to the substrate top P-network pads. The P-pole of the laser is reached by a bonding wire (bonding wire) and the N-pole is reached after flowing through the laser. Furthermore, the N pole welding disc of the substrate and the metal through hole of the substrate reach the PCB welding disc, and then the D pole (namely, the drain electrode) of the MOS tube is reached through the PCB routing. And then, the charges flow through the MOS tube, flow out of the S pole of the MOS tube, and finally return to the GND end of the capacitor through the PCB wiring.

At this time, the minimum loop area of the main discharge loop corresponding to each laser 201 is equal to the minimum loop area of at least one main discharge loop corresponding to other lasers 201, or the difference between the minimum loop areas of at least two main discharge loops is smaller than a preset value, so that it is achieved and ensured that the loop equivalent inductance corresponding to the main discharge loop corresponding to any one laser 201 in the six lasers 201 is equal to the loop equivalent inductance corresponding to the plurality of main discharge loops corresponding to other six lasers 201, or the difference between the loop equivalent inductances corresponding to at least two main discharge loops is smaller than the preset value. In these embodiments, the minimum loop area of the main discharge loop is smaller, which in turn facilitates detection of greater distances by the laser.

Specifically, when the layout structure is designed to route, the bearing capacity of the instantaneous current needs to be considered, the driving loop of each laser 201 is minimized as much as possible, and the minimum driving loop corresponding to each laser 201 can be identified. When the lamination design is carried out, the thinner the lamination is, the smaller the via hole inductance is, and the reduction of the whole loop inductance is more facilitated; moreover, because the plurality of capacitance elements 203 are in parallel connection, when the laser 201 in each loop emits light, at the moment when the switch element 202 is turned on, the minimum capacitance in the main discharge loop is firstly discharged, and the capacitances connected in parallel at other positions are then discharged through the via holes, the power plane and the ground plane, so that the printed circuit board can adopt a six-layer board design; specifically, as shown in fig. 8, the stack of the six-line laser module in the present embodiment includes: the solder resist ink layer, the top layer, the ground layer, the signal layer, the power layer and the bottom layer, and the material information and the thickness information corresponding to each lamination are shown in the following table:

wherein, the expression "1/2 oz + plating" in the above table means that a PCB board is formed by a half ounce copper plate and an electroplating layer; 3313 refers to an insulating medium, where 3313 is a type of PP.

Similarly, when the multi-line laser module is a six-line laser module and the multi-line laser module includes a plurality of capacitive elements, another layout structure that can be implemented is: six lasers are arranged on the substrate, a plurality of switch elements coupled with the lasers are uniformly arranged at the vertex angles of the substrate, at least one capacitor element is arranged around the substrate, the implementation manner is different from that described above, the switch elements are uniformly arranged at the vertex angles of the substrate, the capacitor element is arranged around the substrate, at the moment, the switch elements and the capacitor element are uniformly arranged around the lasers, and it can be ensured that the loop equivalent inductance corresponding to the main discharge loop corresponding to any one of the six lasers is equal to the loop equivalent inductance corresponding to the main discharge loops corresponding to other six lasers, or the difference value of the loop equivalent inductances corresponding to the lasers is smaller than the preset value. In these embodiments, the minimum loop area of the main discharge loop is smaller, which in turn facilitates detection of greater distances by the laser.

In the multi-line laser module in this embodiment, after the layout structure, the routing design and the stack design are performed, not only can the loop equivalent inductance of the main discharge loop corresponding to each laser be equal to the loop equivalent inductances corresponding to the main discharge loops corresponding to the other six lasers, or the difference between the loop equivalent inductances corresponding to the lasers is smaller than a preset value; therefore, the consistency of the multi-line laser module in the distance detection process is effectively ensured; in addition, the multi-line laser module in this embodiment can also ensure that the loop equivalent inductance corresponding to each laser is small, for example, the loop equivalent inductance is smaller than 2nH, and so on, thereby facilitating the detection of the multi-line laser module at a longer distance and improving the practicability and reliability of the multi-line laser module.

According to another embodiment of the present invention, the multi-line laser module may be a two-line laser. That is, the plurality of lasers in the present embodiment includes two laser modules; at this time, the at least one capacitor element includes a first capacitor element, the first capacitor element is disposed in a middle of the first region, the first region is disposed on one side of the two lasers, and the two switch elements coupled to the two lasers are disposed on two sides of the first capacitor element, respectively.

Specifically, when the multi-line laser module unit includes two lasers, the two lasers may be coupled to the same first capacitor, and the first capacitor drives the lasers to emit laser beams. At this time, the first capacitance element may be disposed at one side of the two lasers, and the distances from the first capacitance element to the two lasers are the same, and the two switch elements may be disposed at two sides of the first capacitance element, so that at least one capacitance element and the plurality of switch elements are effectively disposed around the plurality of lasers, and the loop equivalent inductance corresponding to the main discharge loop corresponding to one laser may be equal to the loop equivalent inductance corresponding to the main discharge loop corresponding to the other laser.

The multi-line laser module in the embodiment comprises two lasers, the structure is simple, the implementation is easy, the size is small, the multi-line laser module is convenient to arrange, the use is flexible and reliable, and therefore the application scene and the application range of the multi-line laser module are expanded.

On the basis of any of the above embodiments, in order to ensure the working performance of the multi-line laser module, when specifically designing, the plurality of switching elements may be Mos transistors, and in order to ensure the quality and efficiency of the working of the multi-line laser module, when selecting Mos transistors, the following conditions may be satisfied: the requirements of the driving MOS transistor are small in size, fast in switching speed, small in resistance rds (on) between the drain and the source, large in pulse current, and withstand voltage meeting the requirements of capacitance energy storage, for example: the switching element in this embodiment may be selected to be a GaN switching tube. In addition, when the capacitive element is selected, the following condition may be satisfied: zero dc bias characteristics, wide temperature stability, high insulation resistance, and high capacitance self-resonant frequency. In addition, under the condition of preset safety regulation limitation, the light-emitting power of the multi-wire laser module can be limited to a fixed value, a series of factors such as the light-emitting efficiency of the multi-wire laser module, the voltage resistance value of an MOS (metal oxide semiconductor) tube, the power consistency of the laser, the power regulation requirement caused by light blocking of the structure and the like are considered, and the value of the capacitor element can be from hundreds of picofarads to several nanofarads.

On the basis of any one of the above embodiments, in order to ensure the stable reliability of the laser operation, in this embodiment, the plurality of lasers are disposed on the printed circuit board through the substrate, and the substrate is provided with via holes for connecting to the printed circuit board.

In this embodiment, the specific shape and structure of the substrate are not limited, and those skilled in the art may set the substrate according to specific application requirements and design requirements, for example: the substrate may be a square substrate, a circular substrate, a rectangular substrate, or the like, and more generally, the substrate may be a square substrate; when setting up a plurality of lasers on the base plate, the structure of base plate can realize effectively supporting the laser instrument, is convenient for to the overall arrangement adjustment of laser instrument to, this base plate can also have electrically conductive and radiating function, thereby can further improve the reliable and stable nature of laser instrument work.

In this embodiment, set up a plurality of lasers on printed circuit board through the base plate, not only realized can set up a plurality of lasers on printed circuit board effectively steadily to, the base plate can also have electrically conductive and radiating function, thereby further improve the reliable and stable nature of laser work, thereby prolonged the life of this multi-line laser module.

On the basis of any one of the above embodiments, in the multi-line laser module in this embodiment, for the capacitive element, a distance between at least one capacitive element and an adjacent element satisfies a preset distance condition, and the adjacent element includes at least one of the following: a capacitor element, a switching element, and a laser; so that at least one main discharge loop takes the plurality of lasers as the circle center and is uniformly distributed around the plurality of lasers.

Specifically, when the layout and wiring of the capacitive element, the switching element and the laser device on the printed circuit board are designed, in order to ensure the quality and efficiency of the operation of each element, the distance between the capacitive element and the adjacent element should satisfy a preset distance condition. The preset distance condition may include at least one of:

(a) under the condition of meeting the process design, the closer the distance between the capacitance element and the adjacent element is, the better, because the closer the device spacing is, the smaller the minimum loop area is formed, and the smaller the loop equivalent inductance is.

(b) The distance between the capacitive element and the adjacent element can be controlled at 0.5 mm.

(c) In the main discharge loop, the distance between the capacitance element corresponding to each laser and the laser to which the capacitance element is coupled is equal. Or in the main discharge loop, the difference between the distances between the capacitance element corresponding to each laser and the laser to which the capacitance element is coupled is within a predetermined threshold range.

(d) In the main discharge circuit, if the capacitance element includes two or more capacitances, the distance between the first capacitance and the corresponding switch element is a first distance, the distance between the second capacitance and the corresponding switch element is a second distance, and the first distance and the second distance are equal. Alternatively, the difference between the first distance and the second distance is within a predetermined threshold range.

(e) The distance between the first capacitance element corresponding to each laser in the main discharge loop and the corresponding switch element is equal to the distance between the second capacitance element corresponding to each laser in the auxiliary discharge loop and the corresponding switch element. Alternatively, the difference between the distances is within a predetermined threshold range.

Based on any of the above embodiments, the laser may be a pulsed laser diode die, and specifically, the pulsed laser diode die is an unpackaged pulsed laser diode formed by a crystal structure. Generally, the volume of the pulse laser diode crystal grain is small, so that the layout design of the laser on the ceramic substrate is convenient.

On the basis of any one of the above embodiments, the plurality of lasers are packaged together, specifically, the plurality of lasers can be packaged on the same substrate, so that the layout and wiring design of the plurality of lasers can be conveniently carried out, and the layout and wiring of the plurality of lasers on the printed circuit board can be more uniform.

Of course, those skilled in the art may also package the multiple lasers respectively according to specific application requirements, that is, the multiple lasers are not packaged together, so that a user may perform a separate layout and routing design on the multiple lasers, and a user's requirement for performing a special layout and routing on a certain laser or a certain laser among the multiple lasers is met.

In any of the above embodiments, when the plurality of switching elements and the at least one capacitive element are laid out and wired on the printed circuit board, the plurality of switching elements and the at least one capacitive element are distributed on both sides of the printed circuit board or only on one side of the printed circuit board.

Specifically, when a plurality of switching elements and at least one capacitive element are distributed on both sides of the printed circuit board, for example: the plurality of switch elements and the laser are distributed on the first surface of the printed circuit board, and the at least one capacitor element is distributed on the second surface of the printed circuit board.

Or, the plurality of switching elements and the at least one capacitor element may be distributed on only one side of the printed circuit board, and at this time, the working quality and efficiency of the multi-line laser module may be effectively improved.

On the basis of any one of the above embodiments, when the switching elements and the capacitance elements are respectively arranged on the printed circuit board, the positions of the plurality of switching elements on the printed circuit board are determined by the positions of the pads of the plurality of lasers; the position of the at least one capacitive element on the printed circuit board is determined by the position of the pads of the plurality of lasers.

Specifically, when the plurality of lasers, the plurality of switching elements and the at least one capacitor element are arranged on the printed circuit board, the plurality of lasers can be arranged on the printed circuit board first, at this time, the pad positions of the plurality of lasers can be obtained, then the positions of the plurality of switching elements on the printed circuit board are determined based on the pad positions of the plurality of lasers, and the position of the at least one capacitor element on the printed circuit board can also be determined based on the pad positions of the plurality of lasers, so that the quality and efficiency of electric signal transmission among the lasers, the switching elements and the capacitor element can be ensured, and further the stable reliability of the operation of the multi-line laser module can be effectively ensured.

On the basis of any one of the above embodiments, a plurality of laser beams emitted by the plurality of lasers form a plurality of included angles with a plane on which the printed circuit board is located.

When the plurality of lasers are arranged on the printed circuit board, in order to ensure that the plurality of lasers can stably send the plurality of laser beams outwards, a plurality of included angles can be formed between the plurality of laser beams emitted by the plurality of lasers and the plane where the printed circuit board is located. During specific implementation, the method can be realized through a substrate, namely a plurality of lasers are arranged on the substrate, and then a preset included angle is formed between the substrate and a printed circuit board; alternatively, the laser module can be implemented by a packaging structure for packaging a plurality of lasers, that is, a plurality of included angles are formed between laser beams sent by the lasers and a plane where the printed circuit board is located by the packaging structure.

Of course, those skilled in the art may also implement the method in other manners as long as a plurality of included angles are formed between a plurality of laser beams emitted by a plurality of lasers and a plane where the printed circuit board is located, which is not described herein again.

On the basis of any of the above embodiments, when the plurality of lasers are controlled to emit the plurality of laser beams, the plurality of lasers sequentially emit light in accordance with the positional order of the plurality of lasers.

For example: the plurality of lasers comprise a first laser, a second laser and a third laser, the first laser, the second laser and the third laser are sequentially arranged, when the three lasers are controlled to emit a plurality of laser beams, the first laser can emit the laser beams firstly, then the second laser emits the laser beams, the third laser emits the laser beams finally, and the like. The mode of emitting laser beams effectively expands the working scene and the application range of the multi-line laser module, and further improves the practicability of the multi-line laser module.

In the multi-line laser module provided in this embodiment, when a driving Circuit of the multi-line laser module is designed, the layout of the multiple lasers, the switching element and the capacitor element on the printed Circuit Board is optimally designed, and on the premise that a pcba (printed Circuit Board assembly) production process is satisfied, it can be ensured that not only is a loop equivalent inductance corresponding to a main discharge loop corresponding to any one of the multiple lasers equal to a loop equivalent inductance corresponding to multiple main discharge loops corresponding to other multiple lasers, but also a difference value of the main discharge loop equivalent inductances of the multiple lasers is smaller than a preset value; and, can also reduce the equivalent inductance of the loop that the main discharge loop that laser instrument, capacitive element and switching element constitute corresponds as far as possible to realized not only having guaranteed the detection uniformity of multi-line laser instrument module in the distance detection process, and can also improve the peak power of multi-line laser instrument module, be favorable to multi-line laser instrument module can realize farther distance and detect, and then improved the practicality and the application scope of this multi-line laser instrument module.

Fig. 9 is a schematic structural diagram of a laser radar according to an embodiment of the present invention; referring to fig. 9, the present embodiment provides a lidar including:

a controller 901, communicatively connected to the multi-line laser module 902, for controlling the multi-line laser module 902 to emit a laser beam;

a multi-line laser module 902 comprising:

a laser device disposed on the printed circuit board;

a plurality of switching elements disposed on the printed circuit board, respectively coupled to the laser device, for controlling the laser device to emit a plurality of laser beams;

at least one capacitor element arranged on the printed circuit board, coupled to the laser device, and used for driving the laser device to emit a plurality of laser beams;

wherein the laser device comprises a plurality of lasers forming at least two discharge loops on the printed circuit board, each discharge loop comprising: at least one first laser of the plurality of lasers, a switching element coupled to the at least one first laser, and a capacitive element; the difference value of the loop areas corresponding to any two discharge loops is smaller than a preset value, so that the difference value between the loop equivalent inductances corresponding to any two discharge loops is smaller than the preset value.

It should be noted that at least one main discharge loop may be included in the at least two discharge loops, and at this time, a difference between equivalent inductances of loops corresponding to the main discharge loops of any or at least two of the plurality of lasers is smaller than a preset value.

In one embodiment, a plurality of lasers are disposed side-by-side on a substrate.

In one embodiment, the plurality of switching elements and the at least one capacitive element are uniformly disposed around the laser device.

In one possible implementation, the plurality of lasers includes two lasers; the at least one capacitor element comprises a first capacitor element arranged in the middle of the first area, the first area is arranged on one side of the two lasers, and the two switch elements coupled with the two lasers are respectively arranged on two sides of the first capacitor element.

In one implementable manner, the plurality of lasers includes six lasers; the at least one capacitive element comprises at least one of: six capacitive elements, twelve capacitive elements, eighteen capacitive elements.

In one implementation, six lasers are disposed on a substrate, at least one capacitive element is uniformly disposed at a vertex angle of the substrate, and a plurality of switching elements coupled to the plurality of lasers are uniformly disposed around the substrate; or,

six lasers are arranged on the substrate, a plurality of switch elements coupled with the lasers are uniformly arranged at the top corners of the substrate, and at least one capacitor element is arranged around the substrate.

In one embodiment, the plurality of switching elements are Mos transistors.

In one embodiment, the plurality of lasers are disposed on the printed circuit board through a substrate having vias formed therein for connection to the printed circuit board.

In one embodiment, a mirror for reflecting the plurality of laser beams is provided on one side of the plurality of lasers, and the mirror is provided on the substrate.

In one embodiment, a cap is disposed on the substrate to protect the plurality of lasers.

In one implementation, a plurality of laser patches are packaged on one side of a printed circuit board, and a heat sink is disposed on the other side of the printed circuit board.

In an implementation manner, a distance between at least one capacitive element and an adjacent element satisfies a preset distance condition, and the adjacent element includes at least one of the following: a capacitor element, a switching element, and a laser; so that the main discharge loop of the at least two discharge loops takes the plurality of lasers as the center of a circle and is uniformly distributed around the plurality of lasers.

In one possible implementation, the laser is a pulsed laser diode die.

In one practical approach, multiple lasers are packaged together.

In one embodiment, the plurality of switching elements and the at least one capacitive element are distributed on both sides of the printed circuit board or only on one side of the printed circuit board.

In one embodiment, at least one capacitive element corresponds to a plurality of main discharge loops.

In one embodiment, the position of the plurality of switching elements on the printed circuit board is determined by the position of the pads of the plurality of lasers;

the position of the at least one capacitive element on the printed circuit board is determined by the position of the pads of the plurality of lasers.

In one embodiment, the plurality of laser beams emitted by the plurality of lasers form a plurality of angles with the plane of the printed circuit board.

In one embodiment, the plurality of lasers sequentially emit light according to the position sequence of the plurality of lasers.

The implementation principle and the implementation effect of the laser radar shown in fig. 9 are similar to those of the multi-line laser module shown in fig. 1 to 8, and a part not described in detail in this embodiment may refer to the relevant description of the embodiment shown in fig. 1 to 8, and is not described again here.

Fig. 10 is a schematic structural diagram of a movable platform according to an embodiment of the present invention; referring to fig. 10, the present embodiment provides a movable platform, which may include an unmanned aerial vehicle, an unmanned vehicle, a manned aircraft, or other movable equipment, and specifically, the movable platform may include:

a platform main body 1001;

a multi-line laser module 1002 disposed on the stage main body 1001; the multi-line laser module 1002 includes:

a laser device disposed on the printed circuit board;

The movable platform that this embodiment provided through set up the multi-line laser module 1002 on platform main part 1001, can realize to the detection of surrounding environment, perception terrain information or obstacle position information etc. because multi-line laser module 1002 is higher at the uniformity of probing the in-process to can guarantee the accurate reliability of multi-line laser module 1002 detection information, and then guarantee movable platform's fail safe nature.

In one practical way, six lasers are arranged on the substrate, at least one capacitor element is uniformly arranged at the top corner of the substrate, and a plurality of switch elements coupled with the lasers are uniformly arranged around the substrate; or,

In one embodiment, the plurality of switching elements are Mos transistors.

In one embodiment, the plurality of lasers are disposed on the printed circuit board through a substrate, and the substrate is provided with vias for connection to the printed circuit board.

In one possible implementation, the laser is a pulsed laser diode die.

In one practical approach, multiple lasers are packaged together.

The implementation principle and the implementation effect of the movable platform shown in fig. 10 are similar to those of the multi-line laser module shown in fig. 1 to 9, and specific details of the embodiment that are not described in detail in this embodiment may refer to the related description of the embodiment shown in fig. 1 to 9, and are not described again here.

The technical solutions and the technical features in the above embodiments may be used alone or in combination in case of conflict with the present disclosure, and all embodiments that fall within the scope of protection of the present disclosure are intended to be equivalent embodiments as long as they do not exceed the scope of recognition of those skilled in the art.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A multi-wire laser module, comprising:

a laser device disposed on the printed circuit board;

2. The multi-wire laser module of claim 1, wherein a plurality of the lasers are disposed side-by-side on a substrate.

3. The multi-wire laser module of claim 2, wherein a plurality of the switching elements and at least one of the capacitive elements are uniformly disposed around the laser device.

4. The multi-line laser module of claim 2, wherein the plurality of lasers includes two lasers; at least one capacitor element comprises a first capacitor element, the first capacitor element is arranged in the middle of a first area, the first area is arranged on one side of the two lasers, and the two switch elements coupled with the two lasers are respectively arranged on two sides of the first capacitor element.

5. The multi-line laser module of claim 2, wherein the plurality of lasers includes six lasers; at least one of the capacitive elements comprises at least one of: six capacitive elements, twelve capacitive elements, eighteen capacitive elements.

6. The multi-line laser module of claim 5, wherein six of the lasers are disposed on a substrate, at least one of the capacitive elements is uniformly disposed at a top corner of the substrate, and a plurality of the switching elements coupled to the plurality of the lasers are uniformly disposed around the substrate; or,

7. The multi-wire laser module of claim 1, wherein a plurality of the switching elements are MOS transistors.

8. The multi-wire laser module of claim 2, wherein the substrate is provided with vias for connection to the printed circuit board.

9. The multi-line laser module of claim 8, wherein a mirror for reflecting the plurality of laser beams is disposed on one side of the plurality of lasers, the mirror being disposed on the substrate.

10. The multi-wire laser module of claim 6, wherein a cap is disposed on the substrate for protecting a plurality of the lasers.

11. The multi-wire laser module of claim 1, wherein the laser device is disposed on one side of the printed circuit board, and a heat sink is disposed on the other side of the printed circuit board.

12. The multi-wire laser module of claim 1, wherein a distance between at least one of the capacitive elements and an adjacent element satisfies a predetermined distance condition, the adjacent element comprising at least one of: a capacitor element, a switching element, and a laser; so that the main discharge loop of at least one of the at least two discharge loops takes the plurality of lasers as the center of a circle and is uniformly distributed around the plurality of lasers.

13. The multi-wire laser module of claim 1, wherein the laser is a pulsed laser diode die.

14. The multi-wire laser module of claim 1, wherein a plurality of the lasers are packaged together.

15. The multi-wire laser module of claim 1, wherein a plurality of the switching elements and at least one of the capacitive elements are distributed on both sides of the printed circuit board or on only one side of the printed circuit board.

16. The multi-wire laser module of claim 1, wherein at least one of the capacitive elements corresponds to a plurality of discharge loops.

17. The multi-wire laser module of claim 1,

the position of a plurality of said switching elements on said printed circuit board is determined by the position of pads of a plurality of said lasers;

18. The multi-wire laser module of claim 1,

and a plurality of included angles are formed between the laser beams emitted by the lasers and the plane where the printed circuit board is located.

19. The multi-wire laser module of claim 1,

the plurality of lasers emit light in sequence according to the position sequence of the plurality of lasers.

20. A lidar, comprising:

the multi-line laser module includes:

a laser device disposed on the printed circuit board;

21. The lidar of claim 20, wherein a plurality of the lasers are disposed side-by-side on a substrate.

22. The lidar of claim 21, wherein a plurality of the switching elements and at least one of the capacitive elements are uniformly disposed about the laser device.

23. The lidar of claim 21, wherein the plurality of lasers comprises two lasers; at least one capacitor element comprises a first capacitor element, the first capacitor element is arranged in the middle of a first area, the first area is arranged on one side of the two lasers, and the two switch elements coupled with the two lasers are respectively arranged on two sides of the first capacitor element.

24. The lidar of claim 21, wherein the plurality of lasers comprises six lasers; at least one of the capacitive elements comprises at least one of: six capacitive elements, twelve capacitive elements, eighteen capacitive elements.

25. The lidar of claim 24, wherein six of the lasers are disposed on a substrate, at least one of the capacitive elements is disposed uniformly at a top corner of the substrate, and a plurality of the switching elements coupled to the plurality of lasers are disposed uniformly around the substrate; or,

26. The lidar of claim 20, wherein a plurality of the switching elements are Mos tubes.

27. The lidar of claim 21, wherein the substrate has a via disposed thereon for connection to the printed circuit board.

28. The lidar of claim 27, wherein a mirror for reflecting a plurality of the laser beams is disposed on one side of a plurality of the lasers, the mirror being disposed on the substrate.

29. The lidar of claim 25, wherein a cap is disposed on the substrate for protecting the plurality of lasers.

30. The lidar of claim 20, wherein a plurality of the laser patches are packaged on one side of the printed circuit board, and a heat sink is disposed on the other side of the printed circuit board.

31. The lidar of claim 20, wherein a distance between at least one of the capacitive elements and an adjacent element satisfies a predetermined distance condition, the adjacent element comprising at least one of: a capacitor element, a switching element, and a laser; so that the main discharge loop of at least one of the at least two discharge loops takes the plurality of lasers as the center of a circle and is uniformly distributed around the plurality of lasers.

32. The lidar of claim 20, wherein the laser is a pulsed laser diode die.

33. The lidar of claim 20, wherein a plurality of the lasers are packaged together.

34. The lidar of claim 20, wherein a plurality of the switching elements and at least one of the capacitive elements are disposed on both sides of the printed circuit board or on only one side of the printed circuit board.

35. The lidar of claim 20, wherein at least one of the capacitive elements corresponds to a plurality of discharge loops.

36. Lidar according to claim 20,

37. Lidar according to claim 20,

38. Lidar according to claim 20,

39. A movable platform, comprising:

a platform body;

a laser device disposed on the printed circuit board;

40. The movable platform of claim 39, wherein a plurality of the lasers are disposed side-by-side on a substrate.

41. The movable platform of claim 40, wherein a plurality of the switching elements and at least one of the capacitive elements are uniformly disposed around the laser device.

42. The movable platform of claim 40, wherein the plurality of lasers includes two lasers; at least one capacitor element comprises a first capacitor element, the first capacitor element is arranged in the middle of a first area, the first area is arranged on one side of the two lasers, and the two switch elements coupled with the two lasers are respectively arranged on two sides of the first capacitor element.

43. The movable platform of claim 40, wherein the plurality of lasers comprises six lasers; at least one of the capacitive elements comprises at least one of: six capacitive elements, twelve capacitive elements, eighteen capacitive elements.

44. The movable platform of claim 43, wherein six of the lasers are disposed on a substrate, at least one of the capacitive elements is uniformly disposed at a top corner of the substrate, and a plurality of the switching elements coupled to the plurality of the lasers are uniformly disposed around the substrate; or,

45. The movable platform of claim 39, wherein a plurality of the switching elements are Mos tubes.

46. The movable platform of claim 40, wherein the substrate is provided with vias for connection to the printed circuit board.

47. The movable platform of claim 46, wherein a mirror is disposed on one side of the plurality of lasers for reflecting the plurality of laser beams, the mirror being disposed on the substrate.

48. The movable platform of claim 44, wherein a cap is disposed on the base plate for protecting the plurality of lasers.

49. The movable platform of claim 39, wherein the laser device is disposed on one side of the printed circuit board and the other side of the printed circuit board is provided with a heat sink.

50. The movable platform of claim 39, wherein a distance between at least one of the capacitive elements and an adjacent element satisfies a predetermined distance condition, the adjacent element comprising at least one of: a capacitor element, a switching element, and a laser; so that the main discharge loop of at least one of the at least two discharge loops takes the plurality of lasers as the center of a circle and is uniformly distributed around the plurality of lasers.

51. The movable platform of claim 39, wherein the laser is a pulsed laser diode die.

52. The movable platform of claim 39, wherein a plurality of the lasers are packaged together.

53. The movable platform of claim 39, wherein a plurality of the switch elements and at least one of the capacitor elements are disposed on both sides of the PCB or only on one side of the PCB.

54. The movable platform of claim 39, wherein at least one of the capacitive elements corresponds to a plurality of discharge loops.

55. The movable platform of claim 39,

56. The movable platform of claim 39,

57. The movable platform of claim 39,