Laser pulse signal regulation control circuit and control method for laser guidance
阅读说明：本技术 激光制导用激光脉冲信号调节控制电路及控制方法 (Laser pulse signal regulation control circuit and control method for laser guidance ) 是由 赵长连 贾玉龙 杨辉海 于 2021-12-07 设计创作，主要内容包括：本发明提供一种激光制导用激光脉冲信号调节控制电路,包括光电转换放大模块、信号采集处理模块、采样保持放大器电路和增益控制保持输出电路；所述光电转换方法模块包括光电转换器电路、放大器电路和放大器增益电路；采用一种高频多路、实时、同步、均衡自动增益动态控制方法,连续控制增益衰减量,克服了级联衰减开关方式增益控制不连续,时延长等缺陷。经试制产品测试验证：放大器增益衰减量连续控制,满足四象限高速A/D采样输入端电压值在规定范围内(＜±1V),经FPGA定位计算后即可以得到目标位置信息。(The invention provides a laser pulse signal regulation control circuit for laser guidance, which comprises a photoelectric conversion amplification module, a signal acquisition processing module, a sample-hold amplifier circuit and a gain control hold output circuit, wherein the photoelectric conversion amplification module is used for acquiring a laser pulse signal; the photoelectric conversion method module comprises a photoelectric converter circuit, an amplifier circuit and an amplifier gain circuit; the dynamic control method of high-frequency multipath, real-time, synchronous and balanced automatic gain is adopted to continuously control the gain attenuation amount, and the defects of discontinuous gain control, time delay and the like of a cascade attenuation switch mode are overcome. And (3) testing and verifying trial-manufactured products: the gain attenuation of the amplifier is continuously controlled, the voltage value of the four-quadrant high-speed A/D sampling input end is in a specified range (< +/-1V), and target position information can be obtained after FPGA positioning calculation.)
1. A laser pulse signal adjusts control circuit for laser guidance which characterized in that: the device comprises a photoelectric conversion amplification module, a signal acquisition processing module, a sampling hold amplifier circuit and a gain control hold output circuit; the photoelectric conversion method module comprises a photoelectric converter circuit, an amplifier circuit and an amplifier gain circuit; laser pulse signal P that laser emitter sent shines the target object, and the laser pulse signal F that is reflected by the target object converts photoelectric converter into the photocurrent, and the photoelectricity flows through amplifier circuit and amplifier gain circuit output differential signal, and the differential signal divide into two the tunnel: one path of the signal is processed by the signal acquisition and processing module to obtain a target object positioning digital signal, and the target object positioning digital signal is sent to the cloud-end controller through the communication interface; the cloud end controller controls the flying track of the missile so as to track and hit a target object in real time; the other path of signal passes through a sampling hold amplifier circuit to obtain a voltage signal proportional to the laser pulse signal P; the voltage signal generates an automatic gain control output signal through the gain control holding output circuit, one path of the automatic gain control output signal returns to the amplifier circuit through the first amplifier gain control circuit, and the other path of the automatic gain control output signal returns to the amplifier circuit through the second amplifier gain control circuit.
2. The laser pulse signal adjustment control circuit for laser guidance according to claim 1, characterized in that: the photoelectric converter is a four-quadrant detector UABCD。
3. The laser pulse signal adjustment control circuit for laser guidance according to claim 1, characterized in that: the signal acquisition processing module comprises a four-quadrant A/D sampling converter and an FPGA, one path of the differential signal is input to the input end of the four-quadrant A/D sampling converter, a target object positioning digital signal is obtained through FPGA processing, and the target object positioning digital signal is transmitted to the cloud end controller through an RS422 communication interface.
4. The laser pulse signal adjustment control circuit for laser guidance according to claim 1, characterized in that: the voltage signal is passed through the hold converter Q2 of the gain control hold output circuit to generate an automatic gain control output signal.
5. The laser pulse signal adjustment control circuit for laser guidance according to claim 1, characterized in that: one path of the output signal of the automatic gain control is amplified by the grid QA and returned to the amplifier circuit, and the other path of the output signal of the automatic gain control is output by the drain of the grid Q3 and returned to the amplifier gain circuit.
6. The laser pulse signal adjustment control circuit for laser guidance according to claim 1, characterized in that: the high-voltage cut-OFF circuit is further included, when the laser pulse signal F reflected by the target is abnormal, the FPGA outputs an HV OFF control signal to be sent to the high-voltage cut-OFF circuit, a power switch of the high-voltage cut-OFF circuit is controlled, and a power supply is cut OFF.
7. A laser pulse signal regulation control method for laser guidance is characterized by comprising the following steps:
a laser pulse signal P emitted by a laser emitter irradiates a target object, a laser pulse signal F reflected by the target object is converted into photocurrent through a photoelectric converter, and the photocurrent outputs a differential signal through an amplifier circuit and an amplifier gain circuit;
the differential signal is divided into two paths: one path of the signal is processed by the signal acquisition and processing module to obtain a target object positioning digital signal, and the target object positioning digital signal is sent to the cloud-end controller through the communication interface; the cloud end controller controls the flying track of the missile so as to track and hit a target object in real time; the other path of signal passes through a sampling hold amplifier circuit to obtain a voltage signal proportional to the laser pulse signal P;
the voltage signal generates an automatic gain control output signal through a gain control holding output circuit;
one path of the automatic gain control output signal passes through the amplifier gain control circuit and returns to the amplifier circuit, and the other path of the automatic gain control output signal passes through the amplifier gain control circuit and returns to the amplifier gain circuit.
8. The laser pulse signal adjustment control method for laser guidance according to claim 7, characterized in that: the photoelectric converter is a four-quadrant detector UABCD。
9. The laser pulse signal adjustment control method for laser guidance according to claim 7, characterized in that: the voltage signal is passed through the hold converter Q2 of the gain control hold output circuit to generate an automatic gain control output signal.
10. The laser pulse signal adjustment control method for laser guidance according to claim 7, characterized in that: one path of the output signal of the automatic gain control is amplified by the grid QA and returned to the amplifier circuit, and the other path of the output signal of the automatic gain control is output by the drain of the grid Q3 and returned to the amplifier gain circuit.
Technical Field
The invention designs a laser pulse signal regulation control circuit for laser guidance, and belongs to the technical field of radio communication.
Background
A laser guidance head on a vehicle or ground, illuminating a target, missile or bomb, etc., using a laser located on the vehicle or ground, receives laser pulse signals reflected from the target object, thereby tracking the target object and guiding the missile to the target.
In the laser guidance products on the existing market, a cascade attenuation switch mode is generally adopted for controlling the gain of a laser pulse signal. However, the disadvantage of this method is that the gain control is discontinuous and the time delay is long. From the technical data of the existing cascade attenuation switch mode, the cascade attenuation switch mode is generally classified into multi-stage attenuation methods such as 10db, 20db, 60db and the like. The gain control mode of the attenuation switch belongs to a discontinuous gain control mode, the control of gain attenuation is discontinuous, the output amplitude of laser pulse jumps, the calculation of missile tracking precision is influenced, and the cost is high. At present, when pulse signals of a target object are subjected to four-quadrant high-speed A/D sampling and the voltage value of a conversion input end exceeds a range, laser guidance positioning calculation is wrong, information and accurate laser guidance control cannot be accurately positioned, and an enemy target cannot be accurately destroyed.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art and realize high-frequency real-time, synchronous and balanced automatic gain control of laser guidance, the invention aims to provide a laser pulse signal regulation control circuit for laser guidance; another object of the present invention is to provide a laser pulse signal adjustment control method for laser guidance.
In order to solve the technical problem, the invention provides a laser pulse signal regulation control circuit for laser guidance, which comprises a photoelectric conversion amplification module, a signal acquisition processing module, a sampling hold amplifier circuit and a gain control hold output circuit; the photoelectric conversion method module comprises a photoelectric converter circuit, an amplifier circuit and an amplifier gain circuit; laser pulse signal P that laser emitter sent shines the target object, and the laser pulse signal F through the target object reflection converts photoelectric converter into the photocurrent, and the photoelectricity flows through amplifier circuit and amplifier gain circuit output differential signal, and the differential signal divide into two the tunnel: one path of the signal is processed by the signal acquisition and processing module to obtain a target object positioning digital signal, and the target object positioning digital signal is sent to the cloud-end controller through the communication interface; the cloud end controller controls the flying track of the missile so as to track and hit a target object in real time; the other path of signal passes through a sampling hold amplifier circuit to obtain a voltage signal proportional to the laser pulse signal P; the voltage signal generates an automatic gain control output signal through the gain control holding output circuit, one path of the automatic gain control output signal returns to the amplifier circuit through the first amplifier gain control circuit, and the other path of the automatic gain control output signal returns to the amplifier circuit through the second amplifier gain control circuit.
Further, the photoelectric converter is a four-quadrant detector UABCD。
Further, the signal acquisition processing module comprises a four-quadrant A/D sampling converter and an FPGA, one path of the differential signal is input to the input end of the four-quadrant A/D sampling converter, a target object positioning digital signal is obtained through FPGA processing, and the target object positioning digital signal is transmitted to the cloud end controller through an RS422 communication interface.
Further, the voltage signal generates an automatic gain control output signal via a hold converter Q2 of the gain control hold output circuit.
Further, one path of the output signal of the automatic gain control is amplified by the gate QA and returned to the amplifier circuit, and the other path of the output signal of the automatic gain control is returned to the amplifier gain circuit through the drain output of the gate Q3.
And when the laser pulse signal F reflected by the target is abnormal, the FPGA outputs an HV OFF control signal to be sent to the high-voltage turn-OFF circuit, so that a power switch of the high-voltage turn-OFF circuit is controlled, and the power supply is turned OFF.
The invention also provides a high-frequency multi-path continuous automatic gain control method for laser guidance, which comprises the following steps:
a laser pulse signal P emitted by a laser emitter irradiates a target object, a laser pulse signal F reflected by the target object is converted into photocurrent through a photoelectric converter, and the photocurrent outputs a differential signal through an amplifier circuit and an amplifier gain circuit;
the differential signal is divided into two paths: one path of the signal is processed by the signal acquisition and processing module to obtain a target object positioning digital signal, and the target object positioning digital signal is sent to the cloud-end controller through the communication interface; the cloud end controller controls the flying track of the missile so as to track and hit a target object in real time; the other path of signal passes through a sampling hold amplifier circuit to obtain a voltage signal proportional to the laser pulse signal P;
the voltage signal generates an automatic gain control output signal through a gain control holding output circuit;
one path of the output signal of the automatic gain control returns to the amplifier circuit through the first amplifier gain control circuit, and the other path returns to the amplifier gain circuit through the second amplifier gain control circuit.
Further, the photoelectric converter is a four-quadrant detector UABCD。
Further, the voltage signal generates an automatic gain control output signal via a hold converter Q2 of the gain control hold output circuit.
Further, one path of the output signal of the automatic gain control is amplified by the gate QA and returned to the amplifier circuit, and the other path of the output signal of the automatic gain control is returned to the amplifier gain circuit through the drain output of the gate Q3.
The invention achieves the following beneficial technical effects: the invention provides a laser pulse signal regulation control circuit for laser guidance, and adopts a high-frequency multipath, real-time, synchronous and balanced dynamic regulation control method to continuously control gain attenuation, thereby overcoming the defects of discontinuous gain control, time delay and the like of a cascade attenuation switch mode. And (3) testing and verifying trial-manufactured products: the gain attenuation of the amplifier is continuously controlled, the voltage value of the four-quadrant high-speed A/D sampling input end is in a specified range (< +/-1V), and target position information can be obtained after FPGA positioning calculation.
Drawings
FIG. 1 is a block diagram of the components of an embodiment of the present invention;
FIG. 2 is a schematic block diagram of an automatic gain control circuit of the present invention;
FIG. 3 is a circuit diagram of the photoelectric converter of the present invention;
FIG. 4 is a circuit diagram of an amplifier of the present invention;
FIG. 5 is a circuit diagram of the gain control circuit of the amplifier of the present invention;
FIG. 6 is a circuit diagram of a sample-and-hold amplifier of the present invention;
FIG. 7 is a circuit diagram of the gain control hold output circuit of the present invention;
FIG. 8 is a high voltage shutdown circuit of the present invention.
Detailed Description
The invention is further described with reference to specific examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The invention is further described with reference to the following figures and examples.
As shown in fig. 2, the present invention provides a laser pulse signal adjusting and controlling circuit for laser guidance, which includes a photoelectric conversion amplifying module, a signal collecting and processing module, a sample-and-hold amplifier circuit and a gain control hold output circuit; the photoelectric conversion method module comprises a photoelectric converter circuit, an amplifier circuit and an amplifier gain circuit; laser pulse signal P that laser emitter sent shines the target object, and the laser pulse signal F through the target object reflection converts photoelectric converter into the photocurrent, and the photoelectricity flows through amplifier circuit and amplifier gain circuit output differential signal, and the differential signal divide into two the tunnel: one path of the signal is processed by the signal acquisition and processing module to obtain a target object positioning digital signal, and the target object positioning digital signal is sent to the cloud-end controller through the communication interface; the cloud end controller controls the flying track of the missile so as to track and hit a target object in real time; the other path of signal passes through a sampling hold amplifier circuit to obtain a voltage signal proportional to the laser pulse signal P; the voltage signal generates an automatic gain control output signal through the gain control holding output circuit, one path of the automatic gain control output signal returns to the amplifier circuit through the first amplifier gain control circuit, and the other path of the automatic gain control output signal returns to the amplifier circuit through the second amplifier gain control circuit.
As an embodiment of the present invention, as shown in FIG. 1, the photoelectric converter is a four-quadrant detector UABCD(ii) a Furthermore, the signal acquisition and processing module comprises a four-quadrant A/D sampling converter and an FPGA, and one path of the differential signal is input into a four-quadrant high-speed A/D sampling converter U3AThe input end of the controller is processed by the FPGA to obtain a target object positioning digital signal, and the target object positioning digital signal is transmitted to the cloud end controller through the RS422 communication interface.
A laser pulse signal P emitted by a laser emitter irradiates a target object, and a laser pulse signal F reflected by the target object is convergedOn the photosensitive surface of the four-quadrant detector, a four-quadrant detector U is arrangedABCDConversion into photocurrent I in equal proportionCA、ICB、ICC、ICDFour quadrant detector UABCDThe circuit diagram is shown in fig. 3.
Because the four amplifying gain circuits are the same, the quadrant a is used for explaining the automatic gain control process:
photocurrent ICAVia an amplifier U1AAmplified and converted into an amplified signal VA1The amplifier circuit AMP is shown in fig. 4; amplified signal VA1The differential signal U is obtained by automatic gain control of the amplifier gain control circuit as shown in FIG. 5A1+And UA1-The differential signal is an output voltage signal U processed by the photoelectric conversion amplification moduleA1out；
Voltage signal UA1outThe method is divided into two paths: one path is input into a four-quadrant high-speed A/D sampling converter U3AThe input end of the system is calculated and processed by a field programmable gate array FPGA to obtain a positioning digital signal of a target object, and then the positioning digital signal is transmitted to a cloud end controller through a communication interface RS422, and the cloud end controller controls the flying track of the missile so as to track and hit the target object in real time; the other path is processed by a sample-and-hold amplifier circuit as shown in FIG. 6 to obtain a voltage signal U proportional to the laser pulse signal PAGC OUT(ii) a Voltage signal UAGC OUTThe automatic gain control output signal U is generated by a hold converter Q2 of the gain control hold output circuit shown in fig. 7AGC1；
Automatic gain control output signal UAGC1One way through the amplifier gain control circuit one, i.e. gate QA back to amplifier U1AAfter being processed by the grid QA, the output signal U is automatically gain-controlledAGC1Rising, gate QA drain, source on-resistance lowering, amplifier U1AGain reduction (K ≈ R7A/Ri, K is the amplifier U1AGain); the other path outputs a signal U at the drain of a grid Q3 through a second amplifier gain control circuit, namely a grid Q3AGC2Returning to the amplifier gain circuit U shown in FIG. 52AAnd controlling the gain of the amplifier.
Through two placingGain control of amplifier to make voltage signal UA1outThe specified range (< +/-1V) of the input end voltage of the four-quadrant A/D sampling converter is met; automatic gain control output signal UAGC1And UAGC2Then follows the photoelectric signal ICAThe strength change of the two amplifiers is automatically synchronized, and the gains of the two amplifiers are automatically controlled, so that a stable voltage signal U is outputA1out。
As shown in fig. 8, when the laser pulse signal F reflected by the target is abnormal, if the signal is ultra strong, the FPGA outputs an HV OFF control signal to the high-voltage turn-OFF circuit U3, controls the power supply of the high-voltage turn-OFF circuit to start the switch, and turns OFF the power supply, so that HV OUT =0, and prevents the four-quadrant detector from operating in a saturated state.
The invention also provides a laser pulse signal regulation control method for laser guidance, which comprises the following steps:
a laser pulse signal P emitted by a laser emitter irradiates a target object, a laser pulse signal F reflected by the target object is converted into photocurrent through a photoelectric converter, and the photocurrent outputs a differential signal through an amplifier circuit and an amplifier gain circuit;
the differential signal is divided into two paths: one path of the signal is processed by the signal acquisition and processing module to obtain a target object positioning digital signal, and the target object positioning digital signal is sent to the cloud-end controller through the communication interface; the cloud end controller controls the flying track of the missile so as to track and hit a target object in real time; the other path of signal passes through a sampling hold amplifier circuit to obtain a voltage signal proportional to the laser pulse signal P;
the voltage signal generates an automatic gain control output signal through a gain control holding output circuit;
one path of the output signal of the automatic gain control returns to the amplifier circuit through the first amplifier gain control circuit, and the other path returns to the amplifier gain circuit through the second amplifier gain control circuit.
Further, the photoelectric converter is a four-quadrant detector UABCD。
Further, the voltage signal generates an automatic gain control output signal via a hold converter Q2 of the gain control hold output circuit.
Further, one path of the output signal of the automatic gain control is amplified by the gate QA and returned to the amplifier circuit, and the other path of the output signal of the automatic gain control is returned to the amplifier gain circuit through the drain output of the gate Q3.
The laser pulse signal regulation control circuit for laser guidance provided by the invention uses a multipath real-time synchronous equalization automatic gain control method, and tests prove that the actual gain control range of the laser pulse signal regulation control circuit is more than 70db, the real-time control reaction speed is less than 10ns, the multipath control gain is equalized, the multipath relative error is less than 3db, the dynamic range is large, and the like, so that the sensitivity and the search range of a receiver can be effectively improved.
The present invention has been disclosed in terms of the preferred embodiment, but is not intended to be limited to the embodiment, and all technical solutions obtained by substituting or converting equivalents thereof fall within the scope of the present invention.
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