CN208060714U - A kind of laser radar measuring target range - Google Patents
A kind of laser radar measuring target range Download PDFInfo
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- CN208060714U CN208060714U CN201820552396.4U CN201820552396U CN208060714U CN 208060714 U CN208060714 U CN 208060714U CN 201820552396 U CN201820552396 U CN 201820552396U CN 208060714 U CN208060714 U CN 208060714U
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- laser
- optical lens
- photodetector
- laser radar
- target range
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Abstract
The utility model discloses a kind of laser radar measuring target range, the laser radar includes：Laser homogenizes piece, the first optical lens, beam splitter, the first photodetector, the second optical lens, the second photodetector, processor, display screen and camera；It is described to homogenize the laser that piece sends out the laser and carry out homogenization so that laser uniform irradiation；First optical lens projects after multiple laser is carried out beam-expanding collimation；The beam splitter will be divided into two beams by the laser of the first optical lens beam-expanding collimation；First photodetector detects the laser that first optical lens projects；The laser being reflected back is transmitted away the laser meeting coalescence that measured target is reflected back by second optical lens；The processor measures the distance between the laser radar and the measured target and is sent to the display screen and shows, to accurately detect the distance of object to be measured.
Description
Technical field
The utility model is related to laser radar technique field more particularly to a kind of laser thunders measuring target range
It reaches.
Background technology
Laser radar is to emit the radar system of the characteristic quantities such as the position of detecting laser beam target, speed, and work is former
Reason be to objective emission detectable signal (laser beam), then by the reflected signal of slave target (target echo) received with
Transmitting signal is compared, after making proper treatment, so that it may target is obtained for information about, such as target range, orientation, height, speed
Degree, posture, the even parameters such as shape, to be detected, tracked and be identified that it is by Laser emission to targets such as aircraft, guided missiles
Electric pulse is become light pulse emission and gone out by the compositions such as machine, optical receiver, turntable and information processing system, laser, and light connects
Receipts machine electric pulse is reduced into from the reflected light pulse of target, is sent to display again.
The laser that laser emits in the laser radar of measurement distance in the prior art, which exists, scatters non-uniform problem, shines
The laser being mapped in target is uneven, can not accurately detect the distance of object to be measured.
Therefore, the existing technology needs to be improved and developed.
Utility model content
The technical problem to be solved by the present invention is to for the drawbacks described above of the prior art, provide a kind of measurement mesh
The laser radar of subject distance；The laser radar includes laser, homogenize piece, the first optical lens, beam splitter, the first photoelectricity are visited
Survey device, the second optical lens, the second photodetector, processor, display screen and camera；The laser is sharp for emitting
Light；The laser that piece is homogenized for sending out the laser carries out homogenization so that laser uniform irradiation；Described first
Optical lens projects after the multiple laser that the laser generates is carried out beam-expanding collimation, is first to make laser bundle-enlarging collimation
Laser beam divergence reduces, and is conducive to the long-distance communications of laser；The beam splitter by first optical lens for that will expand
The laser of collimation is divided into two beams, a branch of to be emitted to the first photodetector by the beam splitter, and another beam is emitted to tested mesh
Mark；First photodetector is used to detect the laser that first optical lens projects；Second optical lens is used for
The laser meeting coalescence that measured target is reflected back is transmitted away the laser being reflected back；Described first is measured by processor
The laser of photodetector and the detection of the second photodetector, display screen are shown between the laser radar and the measured target
Distance, solve the problems, such as that laser that laser in the laser radar of measurement distance emits exists and scatter non-uniform, make irradiation
Laser homogenization on to target, to accurately detect the distance of object to be measured.
The utility model technical scheme applied to solve the technical problem is as follows：
A kind of laser radar measuring target range, setting include a laser for emitting laser, wherein described
Laser radar further includes：
Laser for sending out the laser carries out homogenization so that laser uniform irradiation homogenizes piece；
Multiple laser for generating the laser carries out the first optical lens projected after beam-expanding collimation；
Beam splitter for the laser for passing through the first optical lens beam-expanding collimation to be divided into two beams, it is a branch of by described
Beam splitter is emitted to the first photodetector, and another beam is emitted to measured target；
With first optical lens be arranged in the light path for the laser that the laser generates for exploring laser light
First photodetector；
The second optics that laser meeting coalescence for measured target to be reflected back transmits away the laser being reflected back
Lens；
It is used to detect with what second optical lens was arranged in the light path for the laser that second optical lens projects
Second photodetector of laser；
Processor for measuring the distance between the laser radar and the measured target；
It is connected to the processor the display screen for showing the distance between the laser radar and the measured target；
Inside cavity in the laser radar is set and is connected to the processor camera for camera shooting of taking pictures；
The processor respectively with the laser, first photodetector, second photodetector, described
Display screen and camera electrical connection.
Preferably, the laser radar for measuring target range, wherein the laser radar further includes a power supply, described
Power supply is electrically connected with the laser, first photodetector, second photodetector and the processor respectively.
Preferably, the laser radar for measuring target range, wherein the laser includes：Carbon dioxide laser,
The solid state laser of neodymium doped yttrium aluminium garnet laser, semiconductor laser and tunable wave length.
Preferably, the laser radar for measuring target range, wherein the piece that homogenizes is frosted glass, microlens array
Or fly's-eye lens.
Preferably, the laser radar for measuring target range, wherein first photodetector and the second photoelectricity are visited
Surveying device includes：Photomultiplier, semiconductor photo diode, avalanche photodide, Infrared Multi-element Seeker part and visible
Light multiunit detector part.
Preferably, the laser radar for measuring target range, wherein first optical lens has been collimating effect
Beam expanding lens, first optical lens include：Concavees lens and convex lens；Second optical lens has been the poly- of focussing force
Jiao Jing, second optical lens include：Planoconvex spotlight, biconvex lens, aspherical mirror and GRIN Lens.
Preferably, the laser radar for measuring target range, wherein the beam splitter has been the light splitting rib of light splitting effect
Mirror.
Preferably, the laser radar for measuring target range, wherein the laser sends out multiple laser and is accumulated
Periodic rotary is carried out to homogenize above piece, multiple laser the spot size for homogenizing on piece convergence be less than 2.5mm ×
2.5mm, multiple laser homogenize scattering by the piece that homogenizes of periodic rotary.
Preferably, the laser radar for measuring target range, wherein the side that the camera passes through screw or buckle
Formula is detachably arranged in inside the laser radar.
Preferably, the laser radar for measuring target range, wherein the display screen is LED display.
Advantageous effect：A kind of laser radar measuring target range provided by the utility model, compared to the prior art,
The method that the utility model uses innovation solves the laser that laser emits in the laser radar of measurement distance in the prior art
In the presence of non-uniform problem is scattered, the laser being irradiated in target is made to homogenize, to accurately detect the distance of object to be measured.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model laser radar.
Specific implementation mode
To keep the purpose of this utility model, technical solution and advantage clearer, clear, develop simultaneously implementation referring to the drawings
The utility model is further described in example.It should be appreciated that specific embodiment described herein is only used to explain this reality
With novel, it is not used to limit the utility model.
It is uneven to there is scattering for the laser that laser in the laser radar of measurement distance in currently available technology emits
And can not accurately detect object to be measured apart from the problem of, the utility model provide it is a kind of measure target range laser radar.
Shown in Figure 1, the laser radar includes：Laser 10 homogenizes piece 20, the first optical lens 30, beam splitter
40, the first photodetector 50, the second optical lens 60, the second photodetector 70, processor 80, display screen 90 and camera shooting
First 100.
Wherein, the laser 10 is used to emit the target range of laser measurement measured target 200；It is described to homogenize the use of piece 20
Homogenization is carried out so that laser uniform irradiation in the laser for sending out the laser 10；First optical lens 30 is used for
It will be projected after multiple laser beam-expanding collimation that the laser 10 generates；The beam splitter 40 will be for that will pass through first optics
The laser of 30 beam-expanding collimation of lens is divided into two beams, a branch of to be emitted to the first photodetector 50 by the beam splitter 40, another
Beam is emitted to measured target 200 by the beam splitter 40；First photodetector 50 is for detecting from the beam splitter
40 laser projected；The laser 10 homogenizes piece 20, the first optical lens 30, beam splitter 40 and is successively set on same light path
On.
In addition, the laser that second optical lens 60 is used to measured target 200 being reflected back understands coalescence by the reflection
The laser returned transmits away；Second photodetector 70 is used to detect the laser that second optical lens 60 projects；Institute
It states the second optical lens 60 and the second photodetector 70 is successively set in same light path；The processor 80 is for measuring institute
State the distance between laser radar 300 and the measured target 200, the processor 80 be field programmable gate array or
MCU；The display screen 90 connect with the processor 80 for show the laser radar 300 and the measured target 200 it
Between distance, the display screen 90 be LED display；The inside cavity in the laser radar 300 is arranged in the camera 100
It is connect with the processor 80 for camera shooting of taking pictures, the camera 100 is removably pacified by way of screw or buckle
Inside the laser radar 300；The processor 80 respectively with the laser 10, first photodetector 50,
Second photodetector 70, the display screen 90 and the camera 100 are electrically connected.
Further, the laser radar 300 of the measurement target range further includes a power supply, the power supply respectively with institute
Laser 10, first photodetector 50, second photodetector 70 and the processor 80 is stated to be electrically connected.
When it is implemented, shown in Figure 1, wherein the laser 10 may include：Carbon dioxide laser, neodymium-doped
The solid state laser of YAG laser, semiconductor laser and tunable wave length, preferably semiconductor laser（Volume
It is small）, it is used for the laser of emission measurement target range.
When it is implemented, first photodetector 50 is used to detect the laser that the transmitting of beam splitter 40 generates, work as spy
When measuring laser, the first photodetector 50 will generate an electric impulse signal, and the electric impulse signal is sent to processor
80；Second photodetector 70 is for detecting the laser that the second optical lens 60 transmits, the work with the first photodetector 50
It is identical to make process, when the second photodetector 70 detects laser, an electric impulse signal will be generated, and by the electric impulse signal
It is sent to processor 80.
Specifically, processor 80 can be every a preset time（Such as 1 second）A range measurement is carried out, measures hair every time
Go out 200-300 laser pulse, period 60us, duty ratio 0.2%（60ns）, obtain 200-300 result after
It is averaged.Further, processor 80 is additionally operable to front and back measurement the distance between laser radar and measured target A twice, together
When respectively record before and after twice measurement distance when time, according to formula（d1-d2）/ (t1-t2) obtains laser radar and is tested
Relative velocity between target A, d1 are the distance of preceding one-shot measurement, and d2 is the distance of rear one-shot measurement, and t1 is preceding primary
Time when measurement, time when t2 is rear one-shot measurement.
Further, shown in Figure 1, first optical lens 30 has been the beam expanding lens of collimating effect, is set to institute
10 front of laser is stated, first optical lens 30 includes：Concavees lens and convex lens can also be that a concavees lens add one
A convex lens or other modes.
Wherein, it is first photodetector 50 to be arranged below the beam splitter 40, and the beam splitter 40 will be through
The laser for crossing 30 beam-expanding collimation of the first optical lens is divided into two beams, a branch of to be emitted to the first photoelectricity by the beam splitter 40
Detector 50, another beam are emitted to measured target 200 by the beam splitter 40；Wherein, first photodetector 50 wraps
It includes：Photomultiplier, semiconductor photo diode, avalanche photodide, Infrared Multi-element Seeker part and visible light are polynary
Sensitive detection parts；
Wherein, described to homogenize preferably frosted glass when piece 20 is embodied, but may be that do up segmentation to laser light even
Microlens array or fly's-eye lens of change effect etc., the piece 20 that homogenizes is for homogenizing the laser that the laser is sent out
Effect is so that laser uniform irradiation.
When it is implemented, shown in Figure 1, the utility model laser radar 300 further includes being arranged in second photoelectricity
The front of detector 70 is second optical lens 60, wherein second photodetector 70 includes：Photomultiplier,
Semiconductor photo diode, avalanche photodide, Infrared Multi-element Seeker part and visible light multiunit detector part.Described
For second optical lens 60 for that will be converged by 200 reflected laser of measured target, the laser of convergence is transmitted to institute
State the second optical detector 70.Second optical lens 60 has been the focus lamp of focussing force, second optical lens 60
Including：Planoconvex spotlight, biconvex lens, aspherical mirror and GRIN Lens etc..
Second optical lens 60 described in the utility model laser radar 300 is arranged before second photodetector 70
Side enables, by obtaining the convergence of second optical lens 60 by the survey 200 reflected laser of target, to reduce and swash
The loss of light energy during propagation makes second photodetector 70 more can accurately detect the measured target
200 distance.
Further, shown in Figure 1, wherein first photodetector 50 and second photodetector 70
For the laser detected to be sent to the processor 80, the processor 80 can be field programmable gate array（It can
It is a kind of driven by program logical device to program gate array, is equivalent to a microprocessor, and the storage of control program in memory, adds
After electricity, program is loaded into chip execution automatically）Or MCU, it is aobvious in the display screen 90 to handle calculating by the processor 80
Show the distance between the measured target 200 and the laser radar 300.When it is implemented, the transmitting of the laser 10 swashs
Light is homogenized by homogenizing piece 20, and beam-expanding collimation is carried out by first optical lens 30, and then passing through beam splitter 40 will
Laser by 30 beam-expanding collimation of the first optical lens is divided into two beams, a branch of to be emitted to the first light by the beam splitter 40
Electric explorer 50, another beam are emitted to measured target 200；The beam splitter 40 has been the Amici prism of light splitting effect；Described
One photodetector 50 detects the laser projected from the beam splitter 40；The laser reflected by the measured target 200 passes through
Second optical lens 60 is converged, and under second photodetector 70 detection, is sent at the processor 80
Reason, through the processor 80 handle calculate, shown on the display screen 90 measured target 200 position and it is described swash
The distance between optical radar 300 and the measured target 200.By the homogenization for homogenizing piece 20 to laser, described
The convergence of one optical lens, 30 beam-expanding collimation and second optical lens 60 to laser, makes first photodetector
50 and the laser that detects of second photodetector 70 it is more accurate, the distance that the processor 80 calculates is more accurate.
In the laser radar of the utility model, the laser 10 sends out multiple laser and is accumulated periodical turn of progress
Dynamic homogenizes above piece 20, and laser beam is less than 2.5mm × 2.5mm in the spot size converged on piece 20 that homogenizes.It homogenizes
Hot spot on piece 20 can regard new light source as, and laser is quickly homogenized scattering by the piece that homogenizes of periodic rotary；Thus may be used
To eliminate laser speckle of the laser in communication process, laser uniform irradiation measured target is realized, and make the profit of laser energy
It is greatly improved with efficiency, to accurately measure the distance of measured target.
Laser radar provided by the utility model, compared to the prior art, the method that the utility model uses innovation,
So that the utilization ratio of laser energy is improved significantly, pass through the laser for homogenizing piece and laser illumination being made to go out of periodic rotary
It homogenizes rapidly, ensures the uniform irradiation of light and shade luminance area, and can realize and continuously adjust lighting angle, the utility model is made to swash
Optical radar is applied to camera shooting function and thoroughly eliminates the laser speckle in image recording, and image imaging is made more to stablize, is clear.
It should be understood that the application of the utility model is not limited to above-mentioned citing, those of ordinary skill in the art are come
It says, it can be modified or changed according to the above description, and all these modifications and variations should all belong to the appended power of the utility model
The protection domain that profit requires.
Claims (10)
1. a kind of laser radar measuring target range, setting includes a laser for emitting laser, which is characterized in that
The laser radar further includes：
Laser for sending out the laser carries out homogenization so that laser uniform irradiation homogenizes piece；
Multiple laser for generating the laser carries out the first optical lens projected after beam-expanding collimation；
Beam splitter for the laser for passing through the first optical lens beam-expanding collimation to be divided into two beams, it is a branch of to pass through the beam splitting
Mirror is emitted to the first photodetector, and another beam is emitted to measured target；
First for exploring laser light in the light path for the laser that the laser generates is set with first optical lens
Photodetector；
The second optical lens that laser meeting coalescence for measured target to be reflected back transmits away the laser being reflected back；
It is used for exploring laser light with what second optical lens was arranged in the light path for the laser that second optical lens projects
The second photodetector；
Processor for measuring the distance between the laser radar and the measured target；
It is connected to the processor the display screen for showing the distance between the laser radar and the measured target；
Inside cavity in the laser radar is set and is connected to the processor camera for camera shooting of taking pictures；
The processor respectively with the laser, first photodetector, second photodetector, the display
Screen and camera electrical connection.
2. the laser radar according to claim 1 for measuring target range, which is characterized in that the laser radar further includes
One power supply, the power supply respectively with the laser, first photodetector, second photodetector and the place
Manage device electrical connection.
3. the laser radar according to claim 1 for measuring target range, which is characterized in that the laser includes：Two
The solid state laser of carbon oxide laser device, neodymium doped yttrium aluminium garnet laser, semiconductor laser and tunable wave length.
4. the laser radar according to claim 1 for measuring target range, which is characterized in that the piece that homogenizes is hair glass
Glass, microlens array or fly's-eye lens.
5. the laser radar according to claim 1 for measuring target range, which is characterized in that first photodetector
Include with the second photodetector：Photomultiplier, semiconductor photo diode, avalanche photodide, infrared polynary detection
Device and visible light multiunit detector part.
6. the laser radar according to claim 1 for measuring target range, which is characterized in that first optical lens is
The beam expanding lens of collimating effect is played, first optical lens includes：Concavees lens and convex lens；
Second optical lens has been the focus lamp of focussing force, and second optical lens includes：Planoconvex spotlight, lenticular
Mirror, aspherical mirror and GRIN Lens.
7. the laser radar according to claim 1 for measuring target range, which is characterized in that the beam splitter has been light splitting
The Amici prism of effect.
8. the laser radar according to claim 4 for measuring target range, which is characterized in that the laser sends out multi beam
Laser, which is accumulated, to carry out periodic rotary and homogenizes above piece, and multiple laser is small in the spot size for homogenizing on piece convergence
In 2.5mm × 2.5mm, multiple laser homogenizes scattering by the piece that homogenizes of periodic rotary.
9. the laser radar according to claim 1 for measuring target range, which is characterized in that the camera passes through screw
Or the mode of buckle is detachably arranged in inside the laser radar.
10. the laser radar according to claim 1 for measuring target range, which is characterized in that the display screen is aobvious for LED
Display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820552396.4U CN208060714U (en) | 2018-04-18 | 2018-04-18 | A kind of laser radar measuring target range |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820552396.4U CN208060714U (en) | 2018-04-18 | 2018-04-18 | A kind of laser radar measuring target range |
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| CN208060714U true CN208060714U (en) | 2018-11-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021147827A1 (en) * | 2020-01-21 | 2021-07-29 | Focuslight Technologies Inc. | Diffuser device |
-
2018
- 2018-04-18 CN CN201820552396.4U patent/CN208060714U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021147827A1 (en) * | 2020-01-21 | 2021-07-29 | Focuslight Technologies Inc. | Diffuser device |
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