CN101808199A - Video acquisition system and acquisition method thereof - Google Patents
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- CN101808199A CN101808199A CN201010133892A CN201010133892A CN101808199A CN 101808199 A CN101808199 A CN 101808199A CN 201010133892 A CN201010133892 A CN 201010133892A CN 201010133892 A CN201010133892 A CN 201010133892A CN 101808199 A CN101808199 A CN 101808199A
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Abstract
The invention discloses a video acquisition system and an acquisition method thereof. The system comprises at least one image pick-up unit and at least one LED lamp, wherein both the image pick-up unit and the LED lamp comprise a synchronous module used for enabling one or more LEDs to synchronously irradiate when one or more image pick-up units acquire images. The video acquisition system and the acquisition method thereof disclosed by the invention can control the image pick-up unit and the LED lamp to be synchronously triggered and twinkled, so power consumption of the LED lamps is effectively reduced. Simultaneously, the LED lamp sends strong light to illuminate a shot target when images are acquired to enable a camera to capture clear pictures.
Description
Technical field
The invention belongs to the video acquisition technical field, relate to a kind of video acquisition system, relate in particular to a kind of video acquisition system with the flicker of LED lamp synchronous triggering.
Background technology
Common camera and LED illuminating lamp all are products ripe and that be used widely, and the LED illuminating lamp can be used for different lighting fields such as road lighting, traffic lights, car light.Video camera is widely used in the video monitoring industry, in order to gather video flowing.
The definition of video camera shooting picture and light have direct relation, at the scene under the situation that illumination becomes clear inadequately, the definition that adopt the method that increases the LED lamp to improve shooting picture more, the LED illuminating lamp that increases is generally directly controlled by external switch at present, usually be in the state of opening or closing, can not glimmer, and its luminous power is constant under open mode with the synchronous interaction of camera review acquired signal.
Summary of the invention
Technical problem to be solved by this invention is: a kind of video acquisition system with the flicker of LED lamp synchronous triggering is provided, and may command image unit and LED lamp synchronous triggering are glimmered, and effectively reduce the power consumption of LED lamp.
In addition, the present invention further provides a kind of acquisition method of above-mentioned video acquisition system.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of video acquisition system, described system comprises at least one image unit, at least one LED lamp; Described image unit and LED lamp include a synchronous module, in order to when one or more image units carry out IMAQ, make one or more LED lamp synchronous light-emittings.
As a preferred embodiment of the present invention, described synchronization module comprises:
Outer synchronous processing unit carries out oppositely waiting processing in order to the external synchronization signal to reception, and the output external synchronization signal; Output signal to a master slave mode control unit simultaneously, notify described master slave mode control unit that the external synchronization signal input is arranged;
The inter-sync generation unit is in order to produce an inter-sync signal automatically according to software or hardware setting;
The master slave mode control unit is selected control in order to carry out master slave mode;
Synchronizing signal output processing unit in order to selecting to insert external synchronization signal or inter-sync signal according to described master slave mode control unit, and is transformed into composite synchronizing signal with the synchronizing signal that inserts and exports.
As a preferred embodiment of the present invention, described master slave mode control unit carries out master slave mode by one of following three kinds of modes and selects control: automatic control mode: when external synchronization signal is imported, automatically select holotype, produce composite synchronizing signal output according to outer synchronous input signal; When outside not having, importing synchronously, select automatically to export composite synchronizing signal according to the inter-sync signal of inter-sync generation unit input from pattern; Software control: become holotype by serial port setting or from pattern by external software; Internal hardware control: by internal hardware circuit selection holotype or from pattern.
As a preferred embodiment of the present invention, in same connected system, have only an image unit or LED lamp to be operated under the holotype, other image units and LED lamp all are set to from pattern.
As a preferred embodiment of the present invention, be operated in the image unit under the holotype, its synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports described image unit to; Image unit makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of image unit time for exposure and external LED lamp is synchronous;
Be operated in the image unit under the pattern, its synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment to image unit, image unit makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of image unit time for exposure and external LED lamp is synchronous;
Be operated in the LED lamp under the holotype, its synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and exports the LED lamp to, makes the time for exposure of its fluorescent lifetime and image unit synchronous;
Be operated in the LED lamp under the pattern, its synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and export the LED lamp to, make the time for exposure of its fluorescent lifetime and image unit synchronous.
As a preferred embodiment of the present invention,, reduce the stroboscopic of LED lamp by in the middle of two control impuls of LED lamp, inserting equalizing pulse; The time interval of the width of the equalizing pulse of being inserted and the equalizing pulse of being inserted can freely be provided with.
As a preferred embodiment of the present invention, described synchronization module comprises microcontroller MCU, programmable logic device (CPLD); The serial communication function of described microcontroller MCU is controlled the master slave mode of described synchronization module and is selected in order to communicate by letter with external software by external software; Described outer synchronous processing unit, inter-sync generation unit, synchronizing signal output processing unit are realized by programmable logic device (CPLD), external synchronization signal is directly imported by the I/O mouth of described programmable logic device (CPLD), and composite synchronizing signal is by the RS422 serial communication interface output of microcontroller MCU; The temporal and logic relation of each signal is realized by described programmable logic device (CPLD) programming.
A kind of video acquisition system, described system comprises at least one image unit, at least one illuminating lamp; Described image unit and illuminating lamp include a synchronous module, in order to when one or more image units carry out IMAQ, make one or more illuminating lamp synchronous light-emittings.
A kind of video capture method of above-mentioned video acquisition system in same connected system, has only an image unit or LED lamp to be operated under the holotype, and other image units and LED lamp all are set to from pattern;
Be operated in the image unit under the holotype, its synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports described image unit to; Image unit makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of image unit time for exposure and external LED lamp is synchronous;
Be operated in the image unit under the pattern, its synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment to image unit, image unit makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of image unit time for exposure and external LED lamp is synchronous;
Be operated in the LED lamp under the holotype, its synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and exports the LED lamp to, makes the time for exposure of its fluorescent lifetime and image unit synchronous;
Be operated in the LED lamp under the pattern, its synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and export the LED lamp to, make the time for exposure of its fluorescent lifetime and image unit synchronous.
As a preferred embodiment of the present invention, described method comprises by external software the time-delay between the synchronizing signal that LED lamp control impuls and synchronization module extract, the width of control impuls is set.
Beneficial effect of the present invention is: video acquisition system and acquisition method thereof that the present invention proposes, may command image unit and LED lamp synchronous triggering are glimmered, and effectively reduce the power consumption of LED lamp.Simultaneously, the present invention makes the LED lamp send high light at IMAQ to illuminate photographic subjects, make video camera capture distinct image constantly.
Description of drawings
Fig. 1 is the composition schematic diagram of synchronization module in the video acquisition system of the present invention.
Fig. 2 is the composition schematic diagram of main synchronous mode video camera.
Fig. 3 is the composition schematic diagram from the synchronous mode video camera.
Fig. 4 is the composition schematic diagram of main synchronous mode LED lamp.
Fig. 5 is the composition schematic diagram from synchronous mode LED lamp.
Fig. 6 is the schematic diagram of cascade system networking of the present invention.
Fig. 7 is a parallel way networking schematic diagram of the present invention.
Fig. 8 is a hybrid mode networking schematic diagram of the present invention.
Fig. 9 is a LED control impuls sequential chart.
Figure 10 is for inserting the LED control impuls sequential chart of equalizing pulse.
Embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
Embodiment one
The present invention has disclosed a kind of video acquisition system with the flicker of LED lamp synchronous triggering, compare with the common video acquisition system that has only video camera, but this system has increased the LED lamp and the synchronization module of synchronous triggering flicker, this synchronization module is mainly finished the synchronous of video camera time for exposure and LED lamp fluorescent lifetime, be installed in the video camera and the LED lamp in, can be operated in holotype or under pattern.Simultaneously, can make one or more LED lamp synchronous light-emittings so that a plurality of video camera and a plurality of LED lamp synchronous working can be guaranteed to carry out IMAQ constantly at one or more video cameras by this synchronization module by networking.The present invention not only can effectively reduce the power consumption of LED lamp, and IMAQ constantly the LED lamp send high light and illuminate photographic subjects, make video camera capture distinct image.Video acquisition system of the present invention is particularly useful for the shooting at night or the insufficient scene of illumination is taken.
Video acquisition system of the present invention comprises at least one image unit, at least one LED lamp; Described image unit and LED lamp include a synchronous module, and this synchronization module makes one or more LED lamp synchronous light-emittings in order to when one or more image units carry out IMAQ.
See also Fig. 1, described synchronization module comprises outer synchronous processing unit, inter-sync generation unit, master slave mode control unit, synchronizing signal output processing unit.
Wherein, outer synchronous processing unit carries out oppositely waiting processing in order to the external synchronization signal to reception, and the output external synchronization signal; Output signal to the master slave mode control unit simultaneously, notify described master slave mode control unit that the external synchronization signal input is arranged.
The inter-sync generation unit is in order to produce an inter-sync signal automatically according to software or hardware setting.
The master slave mode control unit is selected control in order to carry out master slave mode.Described master slave mode control unit carries out master slave mode by one of following three kinds of modes and selects control: (1) automatic control mode: when external synchronization signal is imported, select holotype automatically, produce composite synchronizing signal output according to outer synchronous input signal; When outside not having, importing synchronously, select automatically to export composite synchronizing signal according to the inter-sync signal of inter-sync generation unit input from pattern; (2) software control: become holotype by serial port setting or from pattern by external software; (3) internal hardware control: by internal hardware circuit (as toggle switch is set) selection holotype or from pattern.
Synchronizing signal output processing unit is in order to selecting to insert external synchronization signal or inter-sync signal according to described master slave mode control unit, and the synchronizing signal that inserts is transformed into composite synchronizing signal exports.
The composite synchronizing signal of synchronization module output can be RS422 or RS485 or LVDS or other useful signal transmission meanss.
The video camera of arbitrary band synchronization module or the LED lamp that has a synchronization module all can be operated in holotype or under pattern according to setting, but in same connected system, can only have a video camera or LED lamp to be operated under the holotype, other video cameras and LED lamp all are set to from pattern.
Be operated in the video camera under the holotype, its circuit theory diagrams as shown in Figure 2, synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports described video camera to; Video camera makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of video camera time for exposure and external LED lamp is synchronous.
Be operated in the video camera under the pattern, its circuit theory diagrams as shown in Figure 3, synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment to video camera, video camera makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of video camera time for exposure and external LED lamp is synchronous.
Be operated in the LED lamp under the holotype, its circuit theory diagrams as shown in Figure 4, synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and export the LED lamp to, make the time for exposure of its fluorescent lifetime and video camera synchronous.
Be operated in the LED lamp under the pattern, its circuit theory diagrams as shown in Figure 5, synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and exports the LED lamp to, makes the time for exposure of its fluorescent lifetime and video camera synchronous.
In the present embodiment, the function of described synchronization module can be realized by microcontroller MCU, programmable logic device (CPLD).The serial communication function of described microcontroller MCU is controlled the master slave mode of described synchronization module and is selected in order to communicate by letter with external software by external software.Described outer synchronous processing unit, inter-sync generation unit, synchronizing signal output processing unit are realized by programmable logic device (CPLD), external synchronization signal is directly imported by the I/O mouth of described programmable logic device (CPLD), and composite synchronizing signal is by the RS422 serial communication interface output of microcontroller MCU; The temporal and logic relation of each signal is realized by described programmable logic device (CPLD) programming.
Communication between microcontroller MCU and the programmable logic device (CPLD) can realize by communication interfaces such as I 2C or SPI.The control mode of the master slave mode controlled function in the synchronization module is selected and can be provided with by toggle switch.Toggle switch links to each other with CPLD by the I/O mouth of CPLD.The switch control functions of LED lamp is realized that by LED light emitting drive integrated circuit present embodiment selects the Lm3404 integrated circuit to realize.Power supply partly adopts the AC24V input, is transformed to microcontroller MCU, programmable logic device (CPLD) and the required DC power supply of LED light emitting drive integrated circuit respectively through power module.In the present embodiment selected integrated circuit replaceable be the integrated circuit of other types, as long as can realize the identical functions demand.
The timing diagram of LED control impuls and synchronizing signal as shown in Figure 9.Wherein, control impuls is the drive pulse signal that control switch is exported to the LED lamp, and the LED lamp is luminous when control impuls is high level.Time-delay between the synchronizing signal that control impuls and synchronization module extract is t
1, the width of control impuls is t
2, the user can come freely to be provided with t by external software
1With t
2Value, synchronous with the fluorescent lifetime and the video camera time for exposure that reach the LED lamp.
In addition, be the stroboscopic effect of balance LED lamp, can reduce the LED stroboscopic, as shown in figure 10 by in the middle of two control impuls, inserting the mode of equalizing pulse.Wherein, the width t of the equalizing pulse of being inserted
3And the time interval of the equalizing pulse of being inserted all can freely be provided with.
As, when the image frame per second is 25f/s, the width of LED control impuls can be set to 1.8ms, the equalizing pulse interval and the equalizing pulse width that insert also can be provided with by external software, the purpose of equalizing pulse is to sacrifice power to exchange the sensible flickering of human eye for, can change as requested, generally can be set to insert 1 equalizing pulse that 2us is wide every 2ms.
But the present invention's flexible networking in the application of reality connects, as linking together by cascade system, parallel way or the hybrid mode synchronizing signal with each video camera and LED lamp.See also Fig. 6 to Fig. 8.As shown in Figure 6, the synchronizing signal of each video camera and LED lamp links together by cascade system, realizes the synchronous of all connection devices.As shown in Figure 7, the synchronizing signal of each video camera and LED lamp links together by parallel way, realizes the synchronous of all connection devices.As shown in Figure 8, the synchronizing signal of each video camera and LED lamp links together by cascade and mode of mixing in parallel, realizes the synchronous of all connection devices.
More than introduced the video acquisition system that the present invention discloses, the present invention also discloses the video capture method of above-mentioned video acquisition system when disclosing above-mentioned video acquisition system.In the described method, in same connected system, have only an image unit or LED lamp to be operated under the holotype, other image units and LED lamp all are set to from pattern.
Be operated in the image unit under the holotype, its synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports described image unit to; Image unit makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of image unit time for exposure and external LED lamp is synchronous.
Be operated in the image unit under the pattern, its synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment to image unit, image unit makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of image unit time for exposure and external LED lamp is synchronous.
Be operated in the LED lamp under the holotype, its synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and exports the LED lamp to, makes the time for exposure of its fluorescent lifetime and video camera synchronous.
Be operated in the LED lamp under the pattern, its synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and export the LED lamp to, make the time for exposure of its fluorescent lifetime and video camera synchronous.
In sum, video acquisition system and acquisition method thereof that the present invention proposes, may command image unit and LED lamp synchronous triggering are glimmered, and effectively reduce the power consumption of LED lamp.Simultaneously, the present invention makes the LED lamp send high light at IMAQ to illuminate photographic subjects, make video camera capture distinct image constantly.
Embodiment two
In the present embodiment, a video camera several LED lamps of can arranging in pairs or groups.In addition, LED lamp can be respectively applied for the shooting of different cameras in different time points.
Embodiment three
In the present embodiment, video acquisition system only comprises a video camera, a LED lamp.In addition, the LED lamp can also be other illuminating lamps.
Here description of the invention and application is illustrative, is not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of disclosed embodiment and change are possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present invention or substantive characteristics, and the present invention can be with other form, structure, layout, ratio, and realize with other assembly, material and parts.Under the situation that does not break away from the scope of the invention and spirit, can carry out other distortion and change here to disclosed embodiment.
Claims (10)
1. a video acquisition system is characterized in that, described system comprises at least one image unit, at least one LED lamp;
Described image unit and LED lamp include a synchronous module, in order to when one or more image units carry out IMAQ, make one or more LED lamp synchronous light-emittings.
2. video acquisition system according to claim 1 is characterized in that:
Described synchronization module comprises:
Outer synchronous processing unit carries out oppositely waiting processing in order to the external synchronization signal to reception, and the output external synchronization signal; Output signal to a master slave mode control unit simultaneously, notify described master slave mode control unit that the external synchronization signal input is arranged;
The inter-sync generation unit is in order to produce an inter-sync signal automatically according to software or hardware setting;
The master slave mode control unit is selected control in order to carry out master slave mode;
Synchronizing signal output processing unit in order to selecting to insert external synchronization signal or inter-sync signal according to described master slave mode control unit, and is transformed into composite synchronizing signal with the synchronizing signal that inserts and exports.
3. video acquisition system according to claim 2 is characterized in that:
Described master slave mode control unit carries out master slave mode by one of following three kinds of modes and selects control:
Automatic control mode: when external synchronization signal is imported, select holotype automatically, produce composite synchronizing signal output according to outer synchronous input signal; When outside not having, importing synchronously, select automatically to export composite synchronizing signal according to the inter-sync signal of inter-sync generation unit input from pattern;
Software control: become holotype by serial port setting or from pattern by external software;
Internal hardware control: by internal hardware circuit selection holotype or from pattern.
4. according to the described video acquisition system of one of claim 1 to 3, it is characterized in that:
In same connected system, have only an image unit or LED lamp to be operated under the holotype, other image units and LED lamp all are set to from pattern.
5. video acquisition system according to claim 4 is characterized in that:
Be operated in the image unit under the holotype, its synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports described image unit to; Image unit makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of image unit time for exposure and external LED lamp is synchronous;
Be operated in the image unit under the pattern, its synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment to image unit, image unit makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of image unit time for exposure and external LED lamp is synchronous;
Be operated in the LED lamp under the holotype, its synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and exports the LED lamp to, makes the time for exposure of its fluorescent lifetime and image unit synchronous;
Be operated in the LED lamp under the pattern, its synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and export the LED lamp to, make the time for exposure of its fluorescent lifetime and image unit synchronous.
6. according to claim 1 or 2 or 3 or 5 described video acquisition systems, it is characterized in that:
By in the middle of two control impuls of LED lamp, inserting equalizing pulse, reduce the stroboscopic of LED lamp; The time interval of the width of the equalizing pulse of being inserted and the equalizing pulse of being inserted can freely be provided with.
7. according to claim 2 or 3 or 5 described video acquisition systems, it is characterized in that:
Described synchronization module comprises microcontroller MCU, programmable logic device (CPLD);
The serial communication function of described microcontroller MCU is controlled the master slave mode of described synchronization module and is selected in order to communicate by letter with external software by external software;
Described outer synchronous processing unit, inter-sync generation unit, synchronizing signal output processing unit are realized by programmable logic device (CPLD), external synchronization signal is directly imported by the I/O mouth of described programmable logic device (CPLD), and composite synchronizing signal is by the RS422 serial communication interface output of microcontroller MCU; The temporal and logic relation of each signal is realized by described programmable logic device (CPLD) programming.
8. a video acquisition system is characterized in that, described system comprises at least one image unit, at least one illuminating lamp;
Described image unit and illuminating lamp include a synchronous module, in order to when one or more image units carry out IMAQ, make one or more illuminating lamp synchronous light-emittings.
9. the video capture method of the described video acquisition system of one of claim 1 to 7 is characterized in that:
In same connected system, have only an image unit or LED lamp to be operated under the holotype, other image units and LED lamp all are set to from pattern;
Be operated in the image unit under the holotype, its synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports described image unit to; Image unit makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of image unit time for exposure and external LED lamp is synchronous;
Be operated in the image unit under the pattern, its synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment to image unit, image unit makes that according to the internal image acquired signal that this composite synchronizing signal produces corresponding frame synchronizing signal and aligns with LED lamp control impuls the fluorescent lifetime of image unit time for exposure and external LED lamp is synchronous;
Be operated in the LED lamp under the holotype, its synchronization module is operated under the holotype, produce an inter-sync signal by the inter-sync generation unit, be transformed to composite synchronizing signal output through synchronizing signal output processing unit, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and exports the LED lamp to, makes the time for exposure of its fluorescent lifetime and image unit synchronous;
Be operated in the LED lamp under the pattern, its synchronization module is operated under pattern, synchronization module receives external synchronization signal and exports composite synchronizing signal after treatment, wherein one tunnel composite synchronizing signal exports the ON-OFF control circuit of LED lamp to, described ON-OFF control circuit produces LED multi-path lamp drive pulse signal according to described synchronizing signal, and export the LED lamp to, make the time for exposure of its fluorescent lifetime and image unit synchronous.
10. video capture method according to claim 8 is characterized in that:
Described method comprises by external software the time-delay between the synchronizing signal that LED lamp control impuls and synchronization module extract, the width of control impuls is set.
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| CN104767901B (en) * | 2014-01-07 | 2018-12-07 | 韩华泰科株式会社 | Line scanning device and control method suitable for the device |
| CN104503934A (en) * | 2014-12-02 | 2015-04-08 | 天津国芯科技有限公司 | Extendable serial transmission device |
| CN104503934B (en) * | 2014-12-02 | 2017-10-24 | 天津国芯科技有限公司 | A kind of expansible serial transmission device |
| CN105306832A (en) * | 2015-09-15 | 2016-02-03 | 北京信路威科技股份有限公司 | Device and method for light filling of image acquisition device |
| CN107820025A (en) * | 2017-12-13 | 2018-03-20 | 北京小米移动软件有限公司 | Take pictures the method and apparatus of processing |
| CN107820025B (en) * | 2017-12-13 | 2020-07-03 | 北京小米移动软件有限公司 | Method and device for photographing processing |
| CN109215273A (en) * | 2018-09-06 | 2019-01-15 | 赛特威尔电子股份有限公司 | A kind of fire alarm control system and method |
| CN113301220A (en) * | 2021-04-27 | 2021-08-24 | 上海欧菲智能车联科技有限公司 | Synchronization method for vehicle-mounted camera and vehicle lamp and FPGA chip |
| CN113301220B (en) * | 2021-04-27 | 2024-01-05 | 上海欧菲智能车联科技有限公司 | Synchronization method of vehicle-mounted camera and car lamp and FPGA chip |
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