CN102623883B - Range gating synchronous control device based on pulse laser scattering light synchronization - Google Patents
Range gating synchronous control device based on pulse laser scattering light synchronization Download PDFInfo
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Abstract
The distance gating synchronous control device based on pulse laser scattering light synchronization comprises a photoelectric conversion circuit, a synchronous control signal driver, a central control and data exchanger, a composite synchronous control signal driver and two programmable delayers, wherein the photoelectric conversion circuit outputs a source trigger signal after detecting laser pulses by using the scattering light of the laser pulses, and the source trigger signal respectively triggers the synchronous control signal driver and the composite synchronous control signal driver. The synchronous control signal driver outputs a pulse signal with delay information and width information, and the pulse signal is adjusted by the programmable delayer and then is output to the image intensifier; the composite synchronous control signal driver outputs a composite synchronous signal with delay information, and the composite synchronous signal is adjusted by a programmable delayer and then is output to the camera. And sending control commands and modifying configuration data to the central control and data exchanger through the main control computer. The invention synchronously controls the camera and the image intensifier, so that the pulse laser imaging system has accurate range gating imaging capability.
Description
Technical field
The present invention relates to a kind of based on hard-wired range gating sync control device, particularly a kind of based on the synchronous high accuracy range gating sync control device of pulse laser scattered light.
Background technology
The underwater pulse laser imaging system is a kind of novel imaging system of setting up on the basis of seawater to bluish-green laser (480-550nm) low loss window under water.The U.S. develops practical " magic lamp " system phase early 1990s in the world; At home, correlative study is started late, and just sets up experimental system up to the early 21st century, but still there are very big gap in performance and foreign system.
Rangerate-gate technique is to utilize pulse laser and gating video camera, is the successively separately scattered light on the different distance and the reverberation of target with time, makes the reverberation of observed target just arrive video camera and imaging in the time of video camera gating work.Its operation principle as shown in Figure 1, comprising laser, image intensifier, video camera and sync control device.Laser emission laser pulse shines target, and video camera receives target laser light reflected and imaging.When laser pulse was in the round way, video camera storbing gate (or optical gate) was closed, as shown in Figure 1a; When reverberation arrived video camera, storbing gate was opened, and allowed the reverberation from target enter video camera, shown in Fig. 1 b.
Can synchronous control technique be to realize the core technology of rangerate-gate technique, be directly connected to the gating image that obtain target.The function that synchronous control technique mainly realizes is that laser and selection pass receiver are realized synchronously, and provide pulse duration and time of delay adjustable strobe pulse.The implementation of Synchronization Control mainly contains two kinds: a kind of is internal synchronization mode, and another kind is external sync mode.
Internal synchronization mode, output source triggering signal in the time of laser emission laser pulse, synchronization control circuit will postpone according to the source triggering signal and broad-adjustable strobe pulse is input to the ICCD video camera to realize the synchronous of laser and ICCD video camera.
External sync mode, the source triggering signal is produced by the pulse daley generator, and the pulse daley generator is input to pulse laser and ICCD video camera from two passages with triggering signal respectively.By controlling these two purposes that can reach lock-out pulse laser and ICCD video camera time of delay that postpone passage respectively.
These two kinds of methods of synchronization all are based on the method for synchronization of laser, require laser that outer synchronizing function is arranged, but there is a settling time at random in laser emission laser pulse, has had a strong impact on the synchronous control accuracy of system.
Summary of the invention
In order to overcome the shortcoming that existing synchronous control technique based on laser is subject to laser pulse influence settling time, the purpose of this invention is to provide a kind of based on the synchronous range gating sync control device of pulse laser scattered light, it can the output delay precision be that 1ns, pulse duration precision are the strobe pulse of 10ns, for rangerate-gate technique provides most crucial solution.
For realizing described purpose, the invention provides a kind of based on the synchronous range gating sync control device of pulse laser scattered light, comprise a photoelectric switching circuit, synchronous control signal driver, composite sync control signal driver, center control and data exchange unit, main control computer, first programmable delay and second programmable delay, wherein:
Photoelectric switching circuit, its input receives the incident laser pulse scattered light, generates and the output source triggering signal;
Synchronous control signal driver and composite sync control signal driver, input separately connect the output of photoelectric switching circuit and center control and data exchange unit; Control signal and configuration data that the synchronous reception sources triggering signal of synchronous control signal driver and composite synchronizing signal driver, receiving center control synchronously and data exchange unit send; The synchronous control signal driver is used for generating and exporting the Synchronization Control pulse signal that has deferred message and pulse width information; The composite synchronizing signal driver is used for generating and exporting the composite synchronizing signal that has deferred message;
First programmable delay, its input connects the output of synchronous control signal driver and center control and data exchange unit, Synchronization Control pulse signal, receiving center control and data exchange unit that reception has deferred message and pulse width information send step length command signal, the first programmable delay adjustment has the step-length of the Synchronization Control pulse signal of deferred message and pulse width information, obtain and export Synchronization Control pulse signal through adjusting, the gating that is used for the control image intensifier constantly and the gating gate-width;
Second programmable delay, its input connect the output of composite sync control signal driver and center control and data exchange unit, receive the composite synchronizing signal that has deferred message and the step length command signal that the center is controlled and data exchange unit sends; The second programmable delay adjustment has the step-length of the composite synchronizing signal of deferred message, obtains and export composite synchronizing signal through adjusting, is used for the operating time of control video camera;
Main control computer has control end and is connected with data exchange unit with center control with the data input/output terminal, its control end output control command, and its data input/output terminal reads center control and the state feedback data of data exchange unit output and the delayed data of output;
Center control and data exchange unit, have control end and data input/output terminal, its control end respectively with the synchronous control signal driver, composite sync control signal driver, first programmable delay, the input of second programmable delay and the control end of main control computer are connected with data terminal, send control command and delayed data, and according to control command and delayed data difference configuration synchronization control signal driver, composite sync control signal driver, first programmable delay, second programmable delay, center control and data exchange unit are used for sending the state feedback data to main control computer, the output delay data.
The present invention compared with prior art has following advantage: (1) the present invention has overcome the shortcoming that laser imaging system is subject to the ambient noise influence of light by day in the weak target imaging; (2) the present invention is can output delay 1ns adjustable, and the pulse signal that pulse duration 10ns is adjustable has improved the range gating synchronous control accuracy; (3) because the present invention has taken into full account the performances such as response time of detector and chip in design process, inherent delay time of system is fixed and equaled 60ns, be better than other similar designs; (4) the present invention can continue to use traditional technology substantially on making, and does not therefore need extra technical costs, and is convenient and practical; (5) the present invention is based on FPGA and programmable delay and realize the range gating synchronization control circuit.
Description of drawings
Fig. 1 a and Fig. 1 b are the rangerate-gate technique schematic diagram;
Fig. 2 the present invention propose based on the synchronous range gating sync control device schematic diagram of pulse laser scattered light;
Fig. 3 is the timing diagram of the Synchronization Control of apparatus of the present invention;
Fig. 4 is the photoelectric switching circuit of apparatus of the present invention;
Fig. 5 is the operational amplification circuit schematic diagram of apparatus of the present invention;
Fig. 6 is the schematic diagram of first and second sync drivers of apparatus of the present invention;
Fig. 7 is the synchronous generator of apparatus of the present invention;
Fig. 8 is the composite synchronizing signal of apparatus of the present invention;
Fig. 9 a and Fig. 9 b are the delayed test result of the present invention at the Synchronization Control pulse signal of indoor confirmatory experiment;
Fig. 9 c and Fig. 9 d are the synchronous control signal of the present invention output clock-pulse width test result at indoor confirmatory experiment;
Figure 10 a and Figure 10 b are the composite synchronizing signal exported for the present invention result at indoor confirmatory experiment.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As shown in Figure 2, the present invention relates to a kind of based on the synchronous range gating sync control device of hard-wired pulse laser scattered light, comprise photoelectric sensing change-over circuit 1, synchronous control signal driver 2, first programmable delay 3, center control and data exchange unit 4, composite sync control signal driver 5, second programmable delay 6, main control computer 7, image intensifier 8 and video camera 9, wherein:
Photoelectric switching circuit 1, its input receives the incident laser pulse scattered light, generates and the output source triggering signal;
Synchronous control signal driver 2 and composite sync control signal driver 5, input separately connect the output of photoelectric switching circuit 1 and center control and data exchange unit 4; Control signal and configuration data that synchronous control signal driver 2 and composite synchronizing signal driver 5 synchronous reception sources triggering signals, receiving center control synchronously and data exchange unit 4 send; Synchronous control signal driver 2 is used for generating and exporting the Synchronization Control pulse signal that has deferred message and pulse width information; Composite synchronizing signal driver 5 is used for generating and exporting the composite synchronizing signal that has deferred message;
First programmable delay 3, its input connects the output of synchronous control signal driver 2 and center control and data exchange unit 4, Synchronization Control pulse signal, receiving center control and data exchange unit 4 that reception has deferred message and pulse width information send step length command signal, first programmable delay 3 is adjusted the step-length of the Synchronization Control pulse signal that has deferred message and pulse width information, obtain and export Synchronization Control pulse signal through adjusting, the gating that is used for control image intensifier 8 constantly and the gating gate-width;
Second programmable delay 6, its input connect the output of composite sync control signal driver 5 and center control and data exchange unit 4, receive the composite synchronizing signal that has deferred message and the step length command signal that the center is controlled and data exchange unit 4 sends; The adjustment of second programmable delay 6 has the step-length of the composite synchronizing signal of deferred message, obtains and export composite synchronizing signal through adjusting, is used for the operating time of control video camera 9;
Main control computer 7, having control end is connected with data exchange unit 4 with center control with the data input/output terminal, its control end output control command, its data input/output terminal reads center control and the state feedback data of data exchange unit 4 outputs and the delayed data of output;
Center control and data exchange unit 4, have control end and data input/output terminal, its control end respectively with synchronous control signal driver 2, composite sync control signal driver 5, first programmable delay 3, the control end of the input of second programmable delay 6 and main control computer 7 is connected with data terminal, send control command and delayed data, and according to control command and delayed data difference configuration synchronization control signal driver 2, composite sync control signal driver 5, first programmable delay 3, second programmable delay 6, center control and data exchange unit 4 are used for sending the state feedback data to main control computer 7, the output delay data.
Described photoelectric switching circuit 1 is by photoelectric sensor 11, operational amplifier 12, comparator 13 and 14 connected in series compositions of level translator, photoelectric sensor 11 passes through operational amplifier 12 and comparator 13 outputting standard TTL signals after detecting laser pulse, by level translator 14 standard TTL signal level is changed and the output source triggering signal.
Described synchronous control signal driver 2 is connected in series by first sync driver and synchronous generator and forms, and wherein: first sync driver generates synchronized signal according to the source triggering signal that receives; Synchronous generator receives synchronized signal, is used for driving synchronous generator and generates and export the Synchronization Control pulse signal that has deferred message and pulse width information.
Described composite sync control signal driver 5 is connected in series by second sync driver and composite sync generator and forms, and wherein: second sync driver generates synchronized signal according to the source triggering signal that receives; Composite sync generator receives synchronized signal, is used for driving composite sync generator and generates and export the composite synchronizing signal that has deferred message.
The pulse signal width that described synchronous generator generates is that 10ns, delay precision are 10ns.The delay precision of the composite synchronizing signal that described composite sync generator produces is 10ns.
The control of described center and data exchange unit 4 are responsible for data exchange task, are had changeable data channel in it, according to current control command switch data passage, and have the function that sends current state informations to main control computer 7.
Described first sync driver, second sync driver adopt the rising edge detection architecture, and the structure of first sync driver, second sync driver is consistent with service behaviour.
The structure of described first programmable delay 3 and second programmable delay 6 is consistent with performance parameter, and the delay step-length is 1ns.
Principle of the present invention is continuous to be seen also shown in Figure 2ly, and photoelectric switching circuit 1 utilizes the scattered light exploring laser light pulse of laser pulse on transmission path.Export Synchronization Control source triggering signal when photoelectric switching circuit 1 utilizes laser pulse after the scattered light on the transmission path detects laser pulse, Synchronization Control source triggering signal is triggering synchronous control signal driver 2 and composite sync control signal driver 5 respectively.2 outputs of synchronous control signal driver have the pulse signal of deferred message and width information, and this pulse signal is exported to image intensifier 8 after adjusting through first programmable delay 3; 5 outputs of composite sync control signal driver have the composite synchronizing signal of deferred message, and this signal is exported to video camera 9 after adjusting through second programmable delay 6.In the course of the work, can carry out information interaction by main control computer 7 and center control and data exchange unit 4, in time send control command, revise configuration data.
The work schedule of Synchronization Control concerns that as shown in Figure 3 wherein: A is laser pulse output; B is the source triggering signal of photoelectric switching circuit 1 output; C is the signal that target reflexes to the target surface of image intensifier 8; D is the Synchronization Control pulse signal of image intensifier 8; E is the composite synchronizing signal of video camera 9.
Source triggering signal and the Synchronization Control pulse signal of control image intensifier 8 and the sequential t of the composite synchronizing signal of control image intensifier 9
DelaySatisfy following relation:
t
delay＝2(H
1+H
2)/c (1)
In the formula: H
1Distance for laser distance objective among Fig. 1 a; H
2Distance for target range image intensifier 8 among Fig. 1 a; C is the propagation velocity of light in atmosphere.
When using, the present invention utilize photoelectric sensor 11 to receive the laser pulse scattered light, by synchronous control signal driver 2 output Synchronization Control pulse signals and composite synchronizing signal driver 5 output composite synchronizing signals, regulate their time of delay, can make the target on 9 pairs of different distance of video camera carry out imaging, utilize the width of Synchronization Control pulse signal simultaneously, the time for exposure of control video camera 9.
As shown in Figure 4, photoelectric switching circuit 1 comprises: photoelectric sensor 11, operational amplifier 12, comparator 13, level translator 14.Photoelectric sensor 11 adopts GT106 photodiode, photosurface diameter 0.1mm, spectral response range 500～1100nm, response time 1ns.Photoelectric sensor 11 is converted into the signal of telecommunication with light signal, mainly calculates the current strength I of output according to formula (2):
I＝α·P
r (2)
In the formula, α is the opto-electronic conversion factor of photodiode, P
rThe luminous power that receives for photodiode.
Be operational amplification circuit, wherein C as Fig. 5
fBe reference capacitance, R
fReference resistance, C
DFor the equivalent capacity of photodiode ,-V
bBe bias voltage; Operational amplification circuit adopts the operational amplification circuit of model OPA657, and transmission delay is 150ps, and current signal is converted into voltage signal, according to the magnitude of voltage V of formula (3) calculation operations amplifying circuit output
0:
V
0＝I·R
f (3)
In the formula, I is current strength.
Can be the used signal of on-site programmable gate array FPGA for the voltage signal with operational amplifier 12 outputs is converted to, utilize comparator 13 and level translator 14 to be translated into 3.3V TTL signal.Comparator 13 adopts the comparator of model ADCMP572, gain bandwidth 1.6GHz; Level transferring chip 14 adopts the level transferring chip of model SN74LVC4245A.
The schematic diagram of first and second sync drivers of apparatus of the present invention as shown in Figure 6, first sync driver and second sync driver adopt the rising edge detection architecture.The D port of source triggering signal Ex_S input d type flip flop, the Q port of d type flip flop connects the input of inverter F; The output of inverter F is connected the input of AND circuit H with source triggering signal Ex_S, make the Synchronization Control enable signal En:En=Ex_S and (notQ) of AND circuit H output, among Fig. 6 CLK be the global clock of system, output that Q is d type flip flop,
For reversed-phase output, the CLR of d type flip flop is that clear signal input, SET are the reset signal input.
The synchronous generator of apparatus of the present invention as shown in Figure 7, synchronous generator comprises impulse generator and data latches, described data latches comprises delayed data latch and width data latch, after synchronous generator receives the output of first sync driver, impulse generator is by the control of Synchronization Control enable signal En, and according to delayed data latch and the width data latch configuration information to time of delay and pulse duration, export the work of corresponding Synchronization Control pulse signal control peripheral hardware, its principle as shown in Figure 7, wherein: CLK is the global clock of system; En is the Synchronization Control enable signal; Sync_pulse_out is the lock-out pulse of synchronous generator output.
Fig. 8 illustrates the composite synchronizing signal of apparatus of the present invention, after composite sync generator receives the output of second sync driver, and according to delayed data latch and the width data latch configuration information to time of delay, the output composite synchronizing signal.In television system, sending and receiving scanning must be synchronously strict, i.e. sending and receiving scan corresponding row, an initial sum final position must strict conformance.The frame frequency of China PAL (Phase Alternating Line) signal processed is 25Hz, and field frequency is 50Hz, every frame 625 row, every 312.5 row.Stipulate simultaneously: the horizontal synchronizing pulse width is 4.7 μ s, and line period is T
H=64 μ s; The field system chronizing impulse width is 2.5 line periods, and the slotted impulse cycle is 32 μ s, and pulse duration is 4.7 μ s; Each field system chronizing impulse is forward and backward respectively the wide pulse of 5 2.35 μ s, is called forward and backward equalizing pulse.Strange field shown in Fig. 8, an idol intact final position that is strange, even, before Qi Chang, an idol final position, add 5 equalizing pulses, strange, even original position that begins to be parity field adds 5 equalizing pulses, 2.5T after Qi Chang, an idol original position
HBe the field system chronizing impulse width.
The present invention utilizes main control computer 7 to send control command and delayed data to center control and data exchange unit 4, and center control and data exchange unit 4 dispose control command and delayed data to synchronous generator, composite sync generator, first programmable delay 3 and second programmable delay 6 respectively according to control command and delayed data.
Photoelectric switching circuit 1 is exported Synchronization Control source triggering signal after detecting laser pulse, then it is imported first sync driver and second sync driver respectively, to gather the rising edge of source triggering signal.The Synchronization Control enable signal triggering synchronous signal generator output of first sync driver output has the pulse signal of certain deferred message and pulse width information, it postpones and the pulsewidth precision is 10ns, carry out the delay control that step-length is 1ns by first programmable delay, 3 pulse signals then, final output delay precision is that 1ns, pulsewidth precision are the synchronous image intensifier 8 of synchronization pulse of 10ns.Fig. 9 a and Fig. 9 b are the delayed test result of the present invention at the Synchronization Control pulse signal of indoor confirmatory experiment; Fig. 9 c and Fig. 9 d illustrate the synchronous control signal of the present invention's output in the clock-pulse width test result of indoor confirmatory experiment, and wherein: Fig. 9 a is pulse duration 10 μ s (being shown as two lattice among the figure), and be the Synchronization Control pulse signal of 10 μ s time of delay; Fig. 9 b is pulse duration 10 μ s, time of delays 5 μ s the Synchronization Control pulse signal.Fig. 9 c is pulse duration 80ns, time of delay 50ns pulse signal; Fig. 9 d is pulse duration 40ns, time of delay 50ns pulse signal.
The synchronous enabled signal triggering composite sync generator output of second sync driver output has the composite synchronizing signal of certain deferred message, it postpones precision is 10ns, carry out the delay control that step-length is 1ns by second programmable delay 6 then, final output delay precision is the synchronous video camera 9 of composite synchronizing signal of 1ns.The composite synchronizing signal of the present invention output is in the result of indoor confirmatory experiment, wherein shown in Figure 10 a, Figure 10 b: composite synchronizing signal time of delay is 0 μ s among Figure 10 a; Composite synchronizing signal time of delay is 50 μ s among Figure 10 b.In the course of the work, can regulate in real time by the parameter of 7 pairs of each output signals of main control computer according to demand.
As shown in Figure 2, the composite synchronizing signal that the objective of the invention is to export the Synchronization Control pulse signal of control image intensifier and control video camera, its concrete job step is as follows:
At first, calculate t time of delay of source triggering signal and Synchronization Control pulse signal and composite synchronizing signal according to formula (1)
Delay, pass through main control computer 7 then with t time of delay
DelayData send to center control and data exchange unit 4, and center control and data exchange unit 4 calculate configuration data N according to formula (4) and (5)
1And N
2:
N
1＝[t
delay/10] (4)
N
2＝[t
delay％10] (5)
Then according to N
1Difference configuration synchronization signal generator and composite sync generator are according to N
2Dispose first programmable delay 3 and second programmable delay 6, calculate the pulse duration configuration information of synchronous generator again according to formula (6).
N
3＝[t
width/10] (6)
In the formula: t
WidthBe the time for exposure of image intensifier 8.
Secondly, laser emission laser pulse, photoelectric sensor 11 receives scattered light and is translated into the signal of telecommunication during for photodiode, utilize operational amplifier 12 output voltage signals then, the multiplication factor of operational amplifier 12 is determined according to laser energy and environment for use, is obtained+3.3V TTL signal by comparator 13 and level translator 14.The TTL signal is imported first sync driver and second sync driver respectively, to detect the rising edge of input signal, the Synchronization Control enable signal triggering synchronous signal generator of first sync driver output, synchronous generator output delay N
1, pulsewidth N
3Pulse signal, this pulse signal further adds deferred message N by first programmable delay 3
2, final output delay time t
DelayThe synchronous image intensifier 8 of pulse signal; The Synchronization Control enable signal of second sync driver output triggers composite sync generator, composite sync generator output delay N
1Composite synchronizing signal, this signal further adds deferred message N by second programmable delay 6
2, final output delay time t
DelayThe synchronous video camera 9 of composite synchronizing signal.In the course of the work, can be according to demand by regulating in real time the main control computer 7 pairs of time of delay and time for exposure.
The above; only be the embodiment among the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; conversion or the replacement expected can be understood, all of the present invention comprising within the scope should be encompassed in.
Claims (9)
1. based on the synchronous range gating sync control device of pulse laser scattered light, it is characterized in that comprising photoelectric switching circuit, synchronous control signal driver, center control and data exchange unit, composite sync control signal driver, first programmable delay and second programmable delay, main control computer and video camera, wherein:
Photoelectric switching circuit, its input receives the incident laser pulse scattered light, generates and the output source triggering signal;
Synchronous control signal driver and composite sync control signal driver, input separately connect the output of photoelectric switching circuit and center control and data exchange unit; Control signal and configuration data that the synchronous reception sources triggering signal of synchronous control signal driver and composite synchronizing signal driver, receiving center control synchronously and data exchange unit send; The synchronous control signal driver is used for generating and exporting the Synchronization Control pulse signal that has deferred message and pulse width information; The composite synchronizing signal driver is used for generating and exporting the composite synchronizing signal that has deferred message;
First programmable delay, its input connects the output of synchronous control signal driver and center control and data exchange unit, Synchronization Control pulse signal, receiving center control and data exchange unit that reception has deferred message and pulse width information send step length command signal, the first programmable delay adjustment has the step-length of the Synchronization Control pulse signal of deferred message and pulse width information, obtain and export Synchronization Control pulse signal through adjusting, the gating that is used for the control image intensifier constantly and the gating gate-width;
Second programmable delay, its input connect the output of composite sync control signal driver and center control and data exchange unit, receive the composite synchronizing signal that has deferred message and the step length command signal that the center is controlled and data exchange unit sends; The second programmable delay adjustment has the step-length of the composite synchronizing signal of deferred message, obtains and export composite synchronizing signal through adjusting, is used for the operating time of control video camera;
Main control computer has control end and is connected with data exchange unit with center control with the data input/output terminal, its control end output control command, and its data input/output terminal reads center control and the state feedback data of data exchange unit output and the delayed data of output;
Center control and data exchange unit, have control end and data input/output terminal, its control end respectively with the synchronous control signal driver, composite sync control signal driver, first programmable delay, the input of second programmable delay and the control end of main control computer are connected with the data input/output terminal, send control command and delayed data, and according to control command and delayed data difference configuration synchronization control signal driver, composite sync control signal driver, first programmable delay, second programmable delay, center control and data exchange unit are used for sending the state feedback data to main control computer, the output delay data.
2. described based on the synchronous range gating sync control device of pulse laser scattered light according to claim 1, it is characterized in that, described photoelectric switching circuit is formed by photoelectric sensor, operational amplifier, comparator and level translator are connected in series, photoelectric sensor detects behind the laser pulse by operational amplifier and comparator outputting standard TTL signal, by level translator with the conversion of standard TTL signal level and output source triggering signal.
3. described based on the synchronous range gating sync control device of pulse laser scattered light according to claim 1, it is characterized in that, described synchronous control signal driver is connected in series by first sync driver and synchronous generator and forms, wherein: first sync driver generates synchronized signal according to the source triggering signal that receives; Synchronous generator receives synchronized signal, is used for driving synchronous generator and generates and export the pulse signal that has deferred message and pulse width information.
4. described based on the synchronous range gating sync control device of pulse laser scattered light according to claim 3, it is characterized in that, described composite sync control signal driver is connected in series by second sync driver and composite sync generator and forms, wherein: second sync driver generates synchronized signal according to the source triggering signal that receives; Composite sync generator receives synchronized signal, is used for driving composite sync generator and generates and export the composite synchronizing signal that has deferred message.
5. described based on the synchronous range gating sync control device of pulse laser scattered light according to claim 1, it is characterized in that: the control of described center and data exchange unit are responsible for data exchange task, are had changeable data channel in it, according to current control command switch data passage, and has the function that sends current state information to main control computer.
6. described based on the synchronous range gating sync control device of pulse laser scattered light according to claim 4, it is characterized in that: described first sync driver, second sync driver adopt the rising edge detection architecture, and the structure of first sync driver, second sync driver is consistent with service behaviour.
7. described based on the synchronous range gating sync control device of pulse laser scattered light according to claim 3, it is characterized in that: the pulse signal width that described synchronous generator generates is that 10ns, delay precision are 10ns.
8. described based on the synchronous range gating sync control device of pulse laser scattered light according to claim 4, it is characterized in that: the delay precision of the composite synchronizing signal that described composite sync generator produces is 10ns.
9. described it is characterized in that: the structure of two programmable delay is consistent with performance parameter based on the synchronous range gating sync control device of pulse laser scattered light according to claim 1, and the delay step-length is 1ns.
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| CN104020460A (en) * | 2014-06-27 | 2014-09-03 | 奇瑞汽车股份有限公司 | Echo signal amplification circuit of laser ranging system |
| CN106993160B (en) * | 2017-04-11 | 2021-02-19 | 石东海 | Live show platform of TV |
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