CN1789947A - Field online integrated tester for pulse laser emitter - Google Patents

Field online integrated tester for pulse laser emitter Download PDF

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Publication number
CN1789947A
CN1789947A CN 200510048202 CN200510048202A CN1789947A CN 1789947 A CN1789947 A CN 1789947A CN 200510048202 CN200510048202 CN 200510048202 CN 200510048202 A CN200510048202 A CN 200510048202A CN 1789947 A CN1789947 A CN 1789947A
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pulse
laser
circuit
pulse laser
output
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CN 200510048202
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CN100373147C (en
Inventor
陈志斌
王呈阳
卓家靖
侯章亚
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Ordnance Technology Research Institute of General Armament Department of Chinese PLA
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Ordnance Technology Research Institute of General Armament Department of Chinese PLA
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Abstract

The invention discloses a field on-line synthetic test device of pulse laser launcher, which is characterized by the following: the pulse laser peak power collector and upload conversion board image collector are fixed on the platform; the control circuit and output end of two collectors connect microcomputer control box separately; the pulse laser peak power collector contains multiband photoelectric converter, laser pulse stretching magnification circuit and voltage gathering card; the upload conversion board image collector is composed of upload conversion board, object lens, CCD cam and image gathering card; the microcomputer control box supplies power to two collectors. The invention displays high integral degree, small bulk and light weight, which is fit for field on-line test.

Description

Field online integrated tester for pulse laser emitter
Technical field
The present invention relates to a kind of laser system photoelectric properties comprehensive test device, specifically a kind of field online integrated tester for pulse laser emitter.
Background technology
The performance test of pulse laser emitter comprises to the test of laser pulse with to two aspects of test of laser facula quality.Aspect the test of laser pulse, obtaining certain achievement aspect monopulse and the broad pulse Laser emission performance test Study on Technology both at home and abroad at present; And, also still belong to blank at present for the measuring technology of narrow pulsewidth, high Repetition Frequency Laser pulse peak power.Aspect the test of laser facula, all making big quantity research aspect the parameter testing of high recurrent frequency pulse laser hot spot both at home and abroad, include several different methods such as ablation method, scanning method and CCD mensuration, and, still do not have open report at present for the measuring technology of list, low-frequency pulse laser facula.
The instrument and equipment that is used for pulse laser emitter performance parameter test aspect at present, though robotization, intelligent degree improve a lot than before, but mostly be to single parameter or with a kind of integration test of wave band of laser pulse, and be mostly in the laboratory, to use.The Computer Analysis of doing as Institutes Of Technology Of Nanjing electrooptics institutes to 1.06 μ m recurrent frequency pulse laser spot center, the pulse laser range finder verification test equipment of Xi'an Applied Optics Research Inst.'s development etc., all mainly be that range finding accuracy, maximum and minimum range, pulse energy, pulsewidth, repetition characteristic and beam divergence angle etc. to range finder using laser detect, for the specificity analysis of repetition pulse, also just at the low frequency laser pulse.Also have many R﹠D institutions also to do the research of parameter testing aspects such as some laser energies and average laser power, but also do not have at present the paired pulses laser transmitter various devices that carry out integration test such as the performance parameter of aspects such as wave band, pulsewidth, peak power and single, low recurrent frequency pulse laser hot spot under the condition in the open air.
Summary of the invention
Purpose of the present invention just provides a kind of field online integrated tester for pulse laser emitter, with the open-air on-line automatic test of the multiband of realizing pulse laser emitter.
The present invention is achieved in that this device is to be fixed with pulse laser peak power collector and last change-over panel image acquisition device on construction of platform, the control circuit of two collectors and output terminal tap system controlled by computer case are with the transmission of carrying out control signal and the transmission of testing acquired signal.Described pulse laser peak power collector includes multiband light electric transducer, laser pulse stretching amplifying circuit and voltage acquisition card, the output of multiband light electric transducer connects the laser pulse stretching amplifying circuit, one tunnel output tapping voltage capture card of the output of laser pulse stretching amplifying circuit and multiband light electric transducer.The described change-over panel image acquisition device of going up is connected to form by last change-over panel, object lens, CCD camera and image pick-up card.The system controlled by computer case provides power supply for two collectors.
For the all-round property testing of pulse laser emitter, mainly be the test that comprises paired pulses peak power and this two aspect of hot spot performance.
When the parameter aspect laser pulse peaks power is tested, the laser beam that the measured pulse laser transmitter sends, gather by pulse laser peak power collector earlier, multiband light electric transducer wherein is that the branch dual mode is handled: one to the pulse laser that receives, for the narrower laser pulse of pulsewidth, be to be entered into the laser pulse stretching amplifying circuit, after broadening amplifies, be input to the voltage acquisition card again, carry out the control collection and the computing of laser pulse signal by the system controlled by computer case, to obtain the parameter testing data of final pulse peak power aspect.They are two years old, for the laser pulse of pulsewidth broad, then be output terminal by the multiband light electric transducer, it is directly inputted to the voltage acquisition card, carry out the control collection and the computing of laser pulse signal by the system controlled by computer case, to obtain the parameter testing data of final pulse peak power aspect.
When the parameter aspect the laser facula quality is tested, the laser beam that the measured pulse laser transmitter is sent also is to handle in two kinds of situation: one, for high Repetition Frequency Laser pulse, be after directly taking in by the CCD camera in the last change-over panel image acquisition device, video picture outputs to image pick-up card again, by the system controlled by computer case information on the image pick-up card is controlled then and gathered and computing, to obtain the parameter testing data of final laser facula quality aspect.Its two, for list, low frequency laser pulse and since directly use the CCD camera catch less than, the change-over panel image acquisition device carries out signals collecting so need to use upward.Single, low frequency laser pulse that last change-over panel on the process in the change-over panel image acquisition device is caught, after object lens collimation focusing thereafter, enter CCD camera and image pick-up card again, by the system controlled by computer case information on the image pick-up card is controlled at last and gathered and computing, to obtain the parameter testing data of final laser facula quality aspect.
The system controlled by computer case transmits control signal respectively to two collectors by the control circuit of two collectors, control of the collection of two collectors to laser pulse signal, after will carrying out data-switching by the voltage signal that voltage acquisition card or image pick-up card collect, methods such as binding data library inquiry and statistical study, calculate the performance parameter of aspects such as the peak power of pulse laser emitter and laser energy, utilize the image processing method of genetic algorithm and neural network that the light spot image that collects under the field condition is carried out de-noising impurity elimination pre-service, and then draw the size and the centre of form of representation of laser facula, the emitting performance parameter of every pulse laser emitter such as centroid position and light distribution, and the time dependent rule of these parameters, and make simple and clear graphic presentation.In addition, the system controlled by computer case also provides power supply for each parts of two collectors, to satisfy apparatus of the present invention need of work under the condition in the open air.
In addition, for adapting to the needs of testing under the open-air online condition, increase work efficiency, solve the unknown test result of small sample distribution, in the testing software of system controlled by computer case, also set up the computing formula of carrying out uncertainty evaluation with trapezoidal fuzzy number method, test result with unknown performance parameter that small sample is distributed is carried out uncertainty evaluation, can guarantee the isoparametric measuring accuracy of peak power, the angle of divergence, spot size of paired pulses laser transmitter under the open-air online condition thus, but and the metering safeguard work of standard laser activity test.
The present invention can also realize like this: the multiband light electric transducer in the pulse laser peak power collector is to connect detector to select circuit after the output terminal of power range switch circuit connects attenuator, select the pulse laser detector of at least two different-wavebands of output terminal tap of circuit at detector, the output of each pulse laser detector connects pulse stretcher and selects circuit, pulse stretcher selects the output one tunnel of circuit to connect the laser pulse stretching amplifying circuit, and one the tunnel connects the voltage acquisition card.
In pulse laser peak power collector, the multiband light electric transducer is set, can carry out opto-electronic conversion to the multi-wave band laser pulse of different peak powers, different-waveband, distinct pulse widths selects, restrictive condition with the signal range of receiving that satisfies the voltage acquisition card, for the smooth test of apparatus of the present invention provides possibility, for the automatic test of carrying out the combination property of pulse laser emitter under the online condition in field lays the first stone.
The present invention can also realize like this: the laser pulse stretching amplifying circuit in the pulse laser peak power collector is to be connected to form successively by broadening amplifying circuit, peak holding circuit and return-to-zero circuit.In pulse laser peak power collector the laser pulse stretching amplifying circuit being set, is special accurate collection at single or Repetition Frequency Laser burst pulse.Because for the narrow pulse electrical signals of multiband light electric transducer output, if directly gather with the voltage capture card, then the quality requirements to the voltage acquisition card is too high, can increase the cost of this proving installation, increase the labile factor in the test process.If crest voltage is kept and broadening, just can use the voltage acquisition of low speed to stick into the collecting work of capable narrow pulse electrical signals, both reduced the quality requirements and the installation cost of voltage acquisition card, reduced the labile factor in the test process again.Simultaneously, for satisfying the test of high recurrent frequency pulse laser peak power, pulse signal can not be opened up too widely again, thus must have quick return-to-zero circuit to the output signal of widening circuit before next pulse arrives, discharge timely and reset, to guarantee precision of test result.
The present invention can also realize like this: going up the change-over panel image acquisition device is before the CCD camera object lens to be set, and object lens the place ahead is provided with change-over panel, and the three collimates focusing; The output map interlinking of CCD camera is as capture card.Should go up the combination of change-over panel, CCD camera and image pick-up card in the utilization of change-over panel image acquisition device, be that the problem for the image acquisition difficulty that solves monopulse or low-frequency pulse laser facula designs.Because the pulsewidth of monopulse or low-frequency pulse laser is generally several nanoseconds to tens nanoseconds, its action time is extremely short, is significantly less than the picking rate of normal CCD camera, therefore just can't capture the hot spot of this pulse laser with the CCD camera.Adopt the change-over panel image acquisition device of going up of the present invention, change-over panel can be converted into visible light with laser facula in utilizations, and can prolong the hold-up time of light spot image simultaneously, makes the laser facula after the conversion become to pursue the pixel corresponding relation with original laser facula.At this moment can directly measure the laser facula after the conversion, thereby solve the image acquisition problem of monopulse or low-frequency pulse laser facula effectively.
The pulse laser that the present invention sends by the pulse laser emitter that pulse laser peak power collector and last change-over panel image acquisition device are set collect each wave band, and import corresponding voltage acquisition card or image pick-up card into, obtain the primary data information (pdi) of corresponding Laser emission performance parameter, after of the control collection and computing of system controlled by computer case, directly export corresponding performance parameter test result again to laser pulse signal.Adopt this structure, make test process can be programme-controlled, oversimplify, thereby the field of having realized measured pulse laser transmitter performance is tested automatically at line generalization.The integrated degree height of the present invention, volume is little, and is in light weight, is suitable for the test of paired pulses laser transmitter combination property under the open-air online condition.
Description of drawings
Fig. 1 is a structured flowchart of the present invention.
Fig. 2 is the structured flowchart of multiband light electric transducer.
Fig. 3 is the structured flowchart of laser pulse stretching amplifying circuit.
Fig. 4 is the electrical schematic diagram of the broadening amplifying circuit in the laser pulse stretching amplifying circuit.
Fig. 5 is the electrical schematic diagram of the peak holding circuit in the laser pulse stretching amplifying circuit.
Fig. 6 is the electrical schematic diagram of the return-to-zero circuit in the laser pulse stretching amplifying circuit.
Fig. 7 is a structure principle chart of going up the change-over panel image acquisition device.
Embodiment
As shown in Figure 1, proving installation of the present invention is to be fixed with the pulse laser peak power collector 1 that is connected to form by multiband light electric transducer 11, laser pulse stretching amplifying circuit 12 and voltage acquisition card 13 on construction of platform 4.The output of multiband light electric transducer 11 connects laser pulse stretching amplifying circuit 12, one tunnel output tapping voltage capture card 13 of the output of laser pulse stretching amplifying circuit 12 and multiband light electric transducer 11.Also be fixed with on the construction of platform 4 by on change-over panel 21, object lens 22, CCD camera 23 and image pick-up card 24 connect to form on change-over panel image acquisition device 2.The control circuit of two collectors and output terminal tap system controlled by computer case 3 are with the transmission of carrying out control signal and the transmission of testing acquired signal.Power supply output in the system controlled by computer case 3 is each parts of tap two collectors also, so that working power to be provided.
Among Fig. 2, the multiband light electric transducer 11 in the pulse laser peak power collector 1 includes power range switch circuit 111, attenuator 112, detector selection circuit 113, pulse laser detector 114 and pulse stretcher and selects five parts such as circuit 115.On power range switch circuit 111, be provided with three tunnel outputs, connect detector behind two attenuators 112 of first via output serial connection and select circuit 113, being that the laser pulse of MW class decays to hectowatt grade earlier with peak power, decay to ten watts of levels again, so that can receive by the collection of voltage acquisition card after the conversion; The second tunnel output is to connect to connect detector behind the attenuator 112 and select circuit 113, being that the laser pulse of hectowatt grade decays to acceptable ten watts of levels with peak power; Third Road output is to be the laser pulse of ten watts of levels at peak power directly, so directly join with detector selection circuit 113 with regard to not being connected in series attenuator.The wave band of the laser pulse that the measured pulse laser transmitter that detector is selected circuit 113 to distinguish automatically to be received sends is with the corresponding detector 114 in gating rear portion.Select the output terminal of circuit 113 to be connected to the pulse laser detector 114 of 1.54 μ m, 1.06 μ m and three different-wavebands of 0.9 μ m at detector.The output of each pulse laser detector connects pulse stretcher and selects circuit 115.Pulse stretcher is selected the output of circuit 115, and one the tunnel connects laser pulse stretching amplifying circuit 12, a tunnel connects voltage acquisition card 13.For opto-electronic conversion afterpulse width is the burst pulse of 10-100ns, pulse stretcher selects circuit 115 just it to be outputed to laser pulse stretching amplifying circuit 12, carry out pulse strenching and handle, deliver to voltage acquisition card 13 after the processing again, carry out the collection of pulse voltage signal.For opto-electronic conversion afterpulse width is broad pulse more than the 100ns, and pulse stretcher selects circuit 115 just it directly to be outputed to voltage acquisition card 13, carries out the collection of pulse voltage signal.
This multiband light electric transducer circuit can be selected conversion to three kinds of power of laser pulse, three kinds of wave bands commonly used and totally ten eight kinds of situations of two kinds of pulsewidths, thereby solved photoelectricity automatic switchover effectively, just can realize the comprehensive test automatically of paired pulses laser transmitter performance parameter thus for the laser pulse of different-waveband, pulsewidth, peak power scope.
Among Fig. 3, the laser pulse stretching amplifying circuit in the pulse laser peak power collector 1 is to be connected to form successively by broadening amplifying circuit, peak holding circuit and return-to-zero circuit, is to be the test of the pulse laser peak power of 6KHz for satisfying repetition frequency.
Its concrete circuit design is: broadening amplifying circuit (Fig. 4) is by two operational amplifier U 1AAnd U 2AConnect to form U with resistance, electric capacity 1AAnd U 2AChoose the interval and correct response peak-power of laser pulse value of the linear work that should consider widening circuit.Electric impulse signal by 11 outputs of multiband light electric transducer enters operational amplifier U 1AOUT 1End, the electric signal that photodetector is converted to is amplified to the forward voltage greater than diode.For the signal of minimum 10ns being amplified to 10V without distortion, require the bandwidth of amplifier should be greater than 50MHz, slewing rate should be greater than 1000V/ μ s.Here two operational amplifier U 1AAnd U 2ABe to select high-speed wideband integrated operational amplifier circuit HA3935 for use.
Peak holding circuit (Fig. 5) is by three operational amplifier U 3A, U 4AAnd U 4BConnect to form with supporting several resistance, electric capacity and diode, form two-stage broadening holding circuit.Its purpose has two: one, keeps the peak value of pulse, the error of bringing when reducing to measure; The 2nd, the pulse signal broadening of nanosecond to Millisecond, is convenient to the signals collecting of low speed voltage acquisition card.Because of pulse recurrence rate can reach 6KHz, if each recurrence interval can be gathered 10 points, then picking rate should be 60KHz, and the time interval of per two collection points only is 16.6 μ s.In order to reduce Acquisition Error, the pulse of nanosecond should be become rect.p., to guarantee that in the acquisition range of 10 points, the peak value of pulse rate of change is less than 2%.If the maximum Vmax of peak value of pulse is 10V, for guaranteeing that the peak value of pulse rate of change is less than 2%, then require behind the broadening the rect.p. negative edge fall off rate (dropping to 0.1V) from 0.9V should be less than 1.2mV/ μ s, that is to require the fall off rate of rect.p. be 6.6ms.Because the one-level widening circuit can only reach the fall time of microsecond level, desires to reach 6.6ms and must adopt the two-stage widening circuit.The ultimate principle of peak holding circuit is to utilize the unidirectional conduction of diode that electric capacity is charged, to obtain time delay.Because the diode forward conducting resistance is little, charging rate is little, so can catch up with the variation of input burst pulse rising edge; And diode oppositely conducting resistance is not big, discharge time constant is big, thus the voltage on the electric capacity just descend slowly, thereby reach the purpose that pulse strenching is kept.Pulse signal becomes the pulse of microsecond level behind the one-level broadening, thereby to operational amplifier U 3A, U 4A, U 4BWith diode D 2The requirement of response speed with regard to corresponding reduction.Operational amplifier U in this peak holding circuit 3A, U 4A, U 4BCan select integrated transporting discharging LF347 for use.
As shown in Figure 6, the return-to-zero circuit is by LF347 integrated operational amplifier, 74LS221 monostalbe trigger and triode Q 1The on-off circuit that connects to form.Its effect is to guarantee that frequency of operation is that cycle of 6KHz pulse is 166 μ s.And in the so short time, in capacitor C 10On the charging of a pulse also do not put, second pulse will arrive.So in capacitor C 10On just have the accumulation of electric charge, thereby can not react the peak value of a pulse exactly.For eliminating this adverse effect, before second pulse arrives, should allow the previous pulsed discharge on the electric capacity finish earlier, wait for the charging of next pulse again to electric capacity.The quick discharge function of electric capacity can be by triode Q 1The on-off circuit that constitutes is finished, and its switch is controlled by last pulse.Its principle is in this way: the pulse behind the first order broadening, and through capacitor C 9Every directly, amplifier U 5AFollow amplifier U 5BAmplify amplifier U 5CAfter following, by monostalbe trigger U 6BThe 90 μ s that delay time are again by monostalbe trigger U 6AOutput, forming width is the rect.p. of the Transistor-Transistor Logic level of 70 μ s.This rect.p. is added to triode Q 1Base stage, make Q 1Conducting, capacitor C 10Can pass through triode Q 1Rapid discharge.In order to allow capacitor C 10On electric weight keep 90 μ s, use monostalbe trigger U 6BThe 90 μ s that delay time are so that the signals collecting of voltage acquisition card 13.Triode Q 1To capacitor C 10The 70 μ s that discharge keep and the shared 160 μ s that discharge, and 6 remaining μ s allow triode Q 1Return to closed condition, to wait for that next pulse is to capacitor C 10Charging.Remain on capacitor C at last 10On laser pulse peaks voltage export by emitter follower, collect system controlled by computer case 3 by thereafter voltage acquisition card 13 and carry out computing.
Among Fig. 7, last change-over panel image acquisition device 2 is that object lens 22 are set before CCD camera 23, and object lens the place ahead is provided with change-over panel 21, and the three keeps collimation; The output map interlinking of CCD camera 23 is as capture card 24, the laser facula information that collects with transmission.

Claims (4)

1, a kind of field online integrated tester for pulse laser emitter, it is characterized in that this device is to be fixed with pulse laser peak power collector (1) and last change-over panel image acquisition device (2) on construction of platform (4), the control circuit of two collectors and output terminal tap system controlled by computer case (3); Described pulse laser peak power collector (1) includes multiband light electric transducer (11), laser pulse stretching amplifying circuit (12) and voltage acquisition card (13), the output of multiband light electric transducer (11) connects laser pulse stretching amplifying circuit (12), one tunnel output tapping voltage capture card (13) of the output of laser pulse stretching amplifying circuit (12) and multiband light electric transducer (11); The described change-over panel image acquisition device (2) of going up is connected to form by last change-over panel (21), object lens (22), CCD camera (23) and image pick-up card (24); System controlled by computer case (3) provides power supply for two collectors.
2, field online integrated tester for pulse laser emitter according to claim 1, it is characterized in that the multiband light electric transducer (11) in the pulse laser peak power collector (1) is to connect detector to select circuit (113) after the output terminal of power range switch circuit (111) connects attenuator (112), select the pulse laser detector (114) of at least two different-wavebands of output terminal of circuit (113) at detector, the output of each pulse laser detector (114) connects pulse stretcher and selects circuit (115), pulse stretcher selects the output one tunnel of circuit (115) to connect laser pulse stretching amplifying circuit (12), and one the tunnel connects voltage acquisition card (13).
3, field online integrated tester for pulse laser emitter according to claim 1 is characterized in that the laser pulse stretching amplifying circuit (12) in the pulse laser peak power collector (1) is to be connected to form successively by broadening amplifying circuit, peak holding circuit and return-to-zero circuit.
4, field online integrated tester for pulse laser emitter according to claim 1 is characterized in that change-over panel image acquisition device (2) is that object lens the place ahead is provided with change-over panel (21) at the preceding object lens (22) that are provided with of CCD camera (23), three's collimation; The output map interlinking of CCD camera (23) is as capture card (24).
CNB2005100482024A 2005-12-19 2005-12-19 Field online integrated tester for pulse laser emitter Expired - Fee Related CN100373147C (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101576373B (en) * 2009-06-17 2010-12-08 中国人民解放军总装备部军械技术研究所 Laser spot collector with low frequency and narrow pulse
CN102384836A (en) * 2010-09-01 2012-03-21 中国科学院光电研究院 Laser multi-parameter real-time measuring device
CN102589705A (en) * 2012-01-20 2012-07-18 中国人民解放军总装备部军械技术研究所 Single-blackbody temperature-controlled MRTD (Minimum Resolvable Temperature Difference) field online automatic detection device and method for thermal imager
CN103776297A (en) * 2014-01-23 2014-05-07 中国人民解放军总参谋部第六十研究所 Laser target identifying system based on character pictures and identifying method of laser target identifying system
CN107276569A (en) * 2017-07-19 2017-10-20 清华大学 Short pulse amplitude measurement method based on multiple pulses peak holding and realize circuit
WO2020061969A1 (en) * 2018-09-27 2020-04-02 深圳市大疆创新科技有限公司 Laser emitting device and ranging device
CN111458695A (en) * 2020-06-22 2020-07-28 光梓信息科技(上海)有限公司 High-speed laser pulse sampling detection circuit, system and method
CN114326326A (en) * 2021-12-30 2022-04-12 深圳市先地图像科技有限公司 Power control method and system for laser direct imaging equipment and related equipment
CN114859323A (en) * 2022-07-07 2022-08-05 四川吉埃智能科技有限公司 Signal processing method and circuit for automatic gain control in pulse ranging

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CN101576373B (en) * 2009-06-17 2010-12-08 中国人民解放军总装备部军械技术研究所 Laser spot collector with low frequency and narrow pulse
CN102384836A (en) * 2010-09-01 2012-03-21 中国科学院光电研究院 Laser multi-parameter real-time measuring device
CN102384836B (en) * 2010-09-01 2014-01-29 中国科学院光电研究院 Laser multi-parameter real-time measuring device
CN102589705A (en) * 2012-01-20 2012-07-18 中国人民解放军总装备部军械技术研究所 Single-blackbody temperature-controlled MRTD (Minimum Resolvable Temperature Difference) field online automatic detection device and method for thermal imager
CN103776297A (en) * 2014-01-23 2014-05-07 中国人民解放军总参谋部第六十研究所 Laser target identifying system based on character pictures and identifying method of laser target identifying system
CN103776297B (en) * 2014-01-23 2015-11-18 中国人民解放军总参谋部第六十研究所 The laser target recognition system of feature based figure and recognition methods thereof
CN107276569A (en) * 2017-07-19 2017-10-20 清华大学 Short pulse amplitude measurement method based on multiple pulses peak holding and realize circuit
CN107276569B (en) * 2017-07-19 2021-04-23 探维科技(北京)有限公司 Short pulse amplitude measuring method based on multiple pulse peak value holding and realization circuit
WO2020061969A1 (en) * 2018-09-27 2020-04-02 深圳市大疆创新科技有限公司 Laser emitting device and ranging device
CN111458695A (en) * 2020-06-22 2020-07-28 光梓信息科技(上海)有限公司 High-speed laser pulse sampling detection circuit, system and method
US11125882B1 (en) 2020-06-22 2021-09-21 Photonic Technologies (Shanghai) Co., Ltd. Laser pulse sampling and detecting circuit, system, and method
CN114326326A (en) * 2021-12-30 2022-04-12 深圳市先地图像科技有限公司 Power control method and system for laser direct imaging equipment and related equipment
CN114859323A (en) * 2022-07-07 2022-08-05 四川吉埃智能科技有限公司 Signal processing method and circuit for automatic gain control in pulse ranging

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