CN105807269A - High repetition frequency narrow pulse laser emission circuit - Google Patents

High repetition frequency narrow pulse laser emission circuit Download PDF

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Publication number
CN105807269A
CN105807269A CN201410850113.0A CN201410850113A CN105807269A CN 105807269 A CN105807269 A CN 105807269A CN 201410850113 A CN201410850113 A CN 201410850113A CN 105807269 A CN105807269 A CN 105807269A
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China
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resistance
circuit
pin
control
control chip
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CN201410850113.0A
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Inventor
任侃
周玉蛟
杨锦清
唐彦琴
潘佳惠
孙爱娟
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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Priority to CN201410850113.0A priority Critical patent/CN105807269A/en
Publication of CN105807269A publication Critical patent/CN105807269A/en
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Abstract

The invention provides a high repetition frequency narrow pulse laser emission circuit comprising a driving circuit and a temperature control circuit of a laser diode. The driving circuit comprises a trigger signal source, a charging discharging circuit, and a switch circuit. The driving circuit is used to control the connecting of the switch circuit by trigger signals, and then the charging discharging circuit is used to control the frequency and the pulse width of the laser emitted by the laser diode, and therefore the high repetition frequency narrow pulse laser emission can be realized. The temperature control circuit comprises a thermoelectric refrigerator and a peripheral circuit based on a control chip. The thermoelectric refrigerator is attached to the laser diode, and the temperature sensing can be carried out, and then the temperature value can be input in the peripheral circuit based on the control chip, and the peripheral circuit is used to realize the refrigeration control of the thermoelectric refrigerator by using the control chip, and therefore the temperature of the laser diode can be reduced, and the laser diode can work in the constant temperature. The emission of the pulse laser can be realized, and the acting distance and the acting precision of the laser ranging can be effectively improved.

Description

A kind of Gao Zhongying narrow-pulse laser radiating circuit
Technical field
The invention belongs to laser measurement field, the altofrequency burst pulse being specifically related to pulse laser is launched, and is applied to laser radar automobile intelligent crashproof, urban architecture and planning, laser precision cutting, laser active quidance etc.
Background technology
Pulse type laser is measured and is adopted laser instrument as light source, using laser as carrier wave, according to time-of-flight, measure distance by detecting the time difference between laser firing pulses and laser echo pulse, possess simple in construction, cheap, reliability is high, strong anti-interference performance, it is not necessary to the advantages such as cooperative target, is widely applied on civilian and military.
Realize the Gao Zhongying of laser, burst pulse is to improve the important means of the operating distance of pulsed laser ranging, dynamic instrumentation precision and capacity of resisting disturbance.But, the impact of Stimulated Light device characteristic of semiconductor and drive circuit distributed inductance, distribution capacity, between impulse waveform and the parameter such as repetition rate, output of laser firing pulses, there is conflicting relation.The relation of repetition rate and pulse width, by the restriction of semiconductor laser maximum duty cycle, will be expected Gao Zhongying, it is necessary to compressed pulse widths, and pulse width can not narrow simply, and when pulse width is too narrow to a certain degree, peak power is decreased obviously.The Laser emission realizing Gao Zhongying burst pulse faces many practical problems.
Summary of the invention
The goal of the invention of the present invention is in that to provide a kind of Gao Zhongying narrow-pulse laser radiating circuit, it is achieved the transmitting of pulse laser, is effectively improved operating distance and the precision of laser ranging.
In order to solve above-mentioned technical problem, the present invention provides a kind of Gao Zhongying narrow-pulse laser radiating circuit, including drive circuit and the temperature control circuit of laser diode;Described drive circuit includes trigger signal source, charge-discharge circuit and on-off circuit;Drive circuit is by triggering signal control switch circuit Guan Bi, and then is launched frequency and the pulsewidth of laser by charge-discharge circuit control laser diode, it is achieved Gao Zhongying narrow-pulse laser is launched;Described temperature control circuit includes thermoelectric refrigerator and the peripheral circuit based on control chip;Thermoelectric refrigerator and laser diode are affixed, carrying out temperature sensing, gained temperature value is input to the peripheral circuit based on control chip, and peripheral circuit realizes the refrigeration control to thermoelectric refrigerator by control chip, thus reducing the temperature of laser diode so that it is be operated in steady temperature.
It is preferred that drive circuit is at laser diode two ends parallel resistance and backward diode, it is achieved the protection to laser diode;
It is preferred that include the temperature measuring circuit integrated with same control chip, control circuit, protection circuit based on the peripheral circuit of control chip;Temperature measuring circuit is for the temperature of real-time Laser Measurement diode;Control circuit is used for controlling thermoelectric refrigerator work;Protection circuit is made up of the internal respective pin of control chip and external circuit, controls loop current, it is prevented that cause the damage of thermoelectric refrigerator and laser diode because electric current is excessive;
It is preferred that control circuit includes error amplifier, H bridge power amplifier module, PID (proportional plus integral plus derivative controller) compensate network, PWM (pulsewidth modulation) controller and mosfet driver;The magnitude of voltage of design temperature is compared generation error signal with the magnitude of voltage measuring temperature by error amplifier, error signal is amplified by H bridge power amplifier module, error signal input PID after amplification compensates network, PID compensates network and obtains the temperature regulated quantity required for thermoelectric refrigerator according to error amount, and PWM controller produces corresponding control signal control mosfet driver according to temperature regulated quantity and drives thermoelectric refrigerator to regulate temperature.
Compared with prior art, it has the great advantage that the present invention, and the present invention can produce the pulse laser of Gao Zhongying burst pulse, improves operating distance and the dynamic stability of laser ranging, and circuit is simple, and method is effective, and stability is strong;Circuit design of the present invention has taken into full account the own inductance capacitance profile of laser diode; when the design of laser diode driver circuit, the actual characteristic according to laser diode sets corresponding resistor electric capacity and design parameter value; and devise protection circuit, it is prevented that laser diode is reversely too drastic;The present invention has taken into full account the temperature characterisitic that laser diode works, and designs laser diode temperature control circuit, makes laser diode working temperature constant;The application such as it is crashproof that the present invention is applicable to laser radar automobile intelligent, urban architecture and planning, laser precision cutting, laser active quidance.
Accompanying drawing explanation
Fig. 1 is the driving circuit principle figure of laser diode in Gao Zhongying narrow-pulse laser radiating circuit of the present invention.
Fig. 2 is the temperature control circuit structure figure of Gao Zhongying narrow-pulse laser radiating circuit of the present invention.
Fig. 3 is the temperature measuring circuit schematic diagram in Gao Zhongying narrow-pulse laser radiating circuit of the present invention.
Fig. 4 is the H bridge power amplification circuit schematic diagram in Gao Zhongying narrow-pulse laser radiating circuit of the present invention.
Fig. 5 is that the PID in Gao Zhongying narrow-pulse laser radiating circuit of the present invention compensates Principles of Network figure.
Fig. 6 is protection circuit theory diagrams in Gao Zhongying narrow-pulse laser radiating circuit of the present invention.
Detailed description of the invention
Easy to understand, according to technical scheme, when not changing the connotation of the present invention, one of ordinary skill in the art is it is envisioned that go out the numerous embodiments of Gao Zhongying narrow-pulse laser radiating circuit of the present invention.Therefore, detailed description below and accompanying drawing are only the exemplary illustrations to technical scheme, and are not to be construed as the whole of the present invention or are considered as the restriction to technical solution of the present invention or restriction.
Drive circuit
In the present embodiment, as it is shown in figure 1, the drive circuit of laser diode SPLLL90_3 includes charge voltage source V1, trigger signal source V2, the 20th resistance R20, the 21st resistance R21, the 22nd resistance R22, the 23rd resistance R23, the 24th resistance R24, the 25th resistance R25, the 9th electric capacity C9, the tenth electric capacity C10, the first high-frequency triode Q1, the second high frequency triode Q2, laser diode D1, the first commutation diode D2, the second commutation diode D3;Wherein, charge voltage source V1 and the 21 resistance R20, the 9th electric capacity C9, laser diode D1, the 22nd resistance R22 loop in series;25th resistance R25 and the second commutation diode D3 in parallel and, one end of the second commutation diode D3 is connected with the backward end of laser diode D1, other end ground connection;The colelctor electrode of the first high-frequency tube Q1 and second end of the 21st resistance R21 are connected, and second end of its ground level and the tenth electric capacity C10 is connected, its grounded emitter;Second end of the second high-frequency tube Q2 colelctor electrode and the 20th resistance R20 is connected, and the colelctor electrode of its ground level and the first high-frequency tube Q1 is connected, and second end of its emitter stage and the tenth electric capacity C10 is connected;Trigger signal source V2 accesses the forward end of the first commutation diode D2, and the negative end of the first commutation diode D2 is connected with first end of the tenth electric capacity C10, and first end of the 21st resistance R21 and second end of the 20th resistance R20 are connected;First end of the 23rd resistance R23 and the negative end of the first commutation diode D2 are connected, its second end ground connection;First end of the 24th resistance R24 and the ground level of the first high-frequency tube Q1 are connected, its second end ground connection;Wherein,
Trigger signal source V2 is used for producing to trigger signal;Charge voltage source V1 and the 21 resistance R20, the 9th electric capacity C9, laser diode D1, the 22nd resistance R22 form charge-discharge circuit;21st resistance R21, the first high-frequency triode Q1 and the second high frequency triode Q2 form on-off circuit, and this on-off circuit is controlled by triggering signal;Described drive circuit is by triggering the Guan Bi of signal control switch circuit, and then is controlled frequency and the pulsewidth of laser diode D1 transmitting laser by charge-discharge circuit, it is achieved Gao Zhongying narrow-pulse laser is launched.
In the present embodiment, triggering the bipolarity ripple that signal is 50KHz, 10ns, become unipolar impulse wave through the first commutation diode D2 filtering, impulse wave controls the break-make of on-off circuit, and then controls the 9th electric capacity C9 discharge and recharge;In charge-discharge circuit, charge voltage source V1 is during on-off circuit disconnects, by charging resistor the 20th resistance R20, the 9th electric capacity C9 is charged, during on-off circuit conducting, the 9th electric capacity C9 is by the 21st resistance R21, the first high-frequency triode Q1, the 22nd resistance R22, the electric discharge of laser diode D1 loop, it is achieved the driving to laser diode D1, wherein, charge voltage source V1=80V, charging resistor the 20th resistance R20 is 10 Ω, charging capacitor the 9th electric capacity C9=1nF.
Meanwhile, drive circuit is at the second commutation diode D3 (i.e. catching diode) of laser diode D1 two ends parallel connection the 25th resistance R25 and Opposite direction connection, it is achieved the protection to laser diode D1, effectively suppresses the reverse overshoot in its two ends.
Thermoelectric refrigerator
As in figure 2 it is shown, the present embodiment laser diode SPLLL90_3 is placed in thermostatic chamber, it is affixed with the cold end of thermoelectric refrigerator TEC.Thermostatic chamber is made up of aluminium material, and chamber body is stuffed heat insulated by polyurethane material.Radiator is loaded on the hot junction of thermoelectric refrigerator TEC, in order to add heat-flash transmission, is generally adopted heat-conducting silicone grease and coheres.Laser diode SPLLL90_3 works long hours and can produce substantial amounts of thermic load, causes that own temperature constantly raises, and the temperature of the real-time Laser Measurement diode SPLLL90_3 of temperature sensor of thermoelectric refrigerator TEC also feeds back to the control circuit of thermoelectric refrigerator TEC;Control circuit, by driving thermoelectric refrigerator TEC work based on single-chip integration formula control chip ADN8831, controls thermoelectric refrigerator TEC refrigeration, thus reducing the temperature of laser diode so that it is be operated in steady temperature.
Temperature measuring circuit
As it is shown on figure 3, the temperature measuring circuit of laser diode SPLLL90_3 includes the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and variable resistance Rth, first end of the first resistance R1 and first end of the 3rd resistance R3 are all connected to reference voltage VREF, ground connection after the first resistance R1 and the second resistance R2 series connection, the 3rd resistance R3 and the four resistance R4, variable resistance RthGround connection after series connection.
Aforementioned temperature measuring circuit essence is to adopt the H-bridge circuit structure after improving, and wherein, works as R3=17.68 Ω, R4=7.68K Ω, Rth=10k Ω, design temperature is 25 DEG C, and when laser diode SPLLL90_3 operating temperature is 25 DEG C, bridge balance, departure is 0;When laser diode SPLLL90_3 temperature change, it is assumed that RthVariable quantity be Δ R, then departure Δ V is as follows:
ΔV = VREF ( R 4 + R th + ΔR R 3 + R 4 + R th + ΔR - R 2 R 1 + R 2 ) - - - ( 1 )
Assume R1=R2=R4=Rth=R, R3=2R, then formula (1) can turn to:
ΔV = ΔR 4 R + ΔR · VREF 2 - - - ( 2 )
So, the variations in temperature of laser diode SPLLL90_3 has been transformed into change in voltage, departure Δ V sends into the 4th pin OUT1 by feedback resistance after the high accuracy error amplifier CHOP1 within control chip ADN8831 amplifies, and sends into high accuracy error amplifier CHOP2 and carry out PID compensation together with the 5th pin IN2P design temperature VTEP.
H bridge power amplifier module
As shown in Figure 4, in laser diode SPLLL90_3 temperature control circuit, H bridge power amplifier module includes acp chip ADN8831 (in figure U1), thermoelectric refrigerator TEC (in figure U4), a FDW2520 chip U2 (MOSFET pipe), the 2nd FDW2520 chip U3, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 17th resistance R17, the 5th electric capacity R5, the 6th electric capacity C6, the first inductance L1;Wherein,
17 pins (COMPOSC, the power pin of chip internal crystal oscillator) of ADN8831 meet VCC (outside 5V power supply), 16 pin (SYNCI/Clock input pin) and the 14th resistance R14 series connection VCC, 14 pin (SS/nullStart set of time pin) ground connection of connecting with the 6th electric capacity C6,13 pin (FREQ,Switching frequency arranges pin) ground connection of connecting with the 15th resistance R15,11 pin (TMPGD,Temperature indicates pin) ground connection of connecting with LED forward,19 pin (SPGATE,The driving output pin of outside metal-oxide-semiconductor) it is connected with the 4th pin (output pin of PMOS) of a FDW2520 chip (MOSFET pipe),20 pin (SWITCH,The switching signal pin of outside PMOS) 3 pins (PMOS source class) receiving a FDW2520 chip of connecting with the 16th resistance R16,21 pin (SNGATE,The switch pin of outside NMOS) it is connected with the 5th pin (NMOS tube output) of a FDW2520 chip,23 pin (SFB,Metal-oxide-semiconductor feedback control pin) ground connection of connecting with the 6th electric capacity C6,24 pin (COMPSW,The control pin of switching amplifier) ground connection of connecting with the 5th electric capacity C5,25th pin (LPGATE,PMOS Linear Driving output pin) it is connected with the 4th pin (PMOS output pin) of the 2nd FDW2520 chip,26th pin (LNGATE,NMOS tube Linear Driving output pin) it is connected with the 5th pin (NMOS tube output pin) of the 2nd FDW2520 chip,27 pin (LFB,Linear Feedback Control pin) it is connected with the 3rd pin (PMOS source class) and the 6th pin (NMOS tube source class) of the 2nd FDW2520 chip,28 pin (CS,Control current input pin) it is connected with the 1st end (forward end) of TEC,1st pin (PMOS drain electrode) of the oneth FDW2520 chip meets VCC,3rd pin (PMOS source class) is connected with the 6th pin (NMOS tube source class),6th pin (NMOS tube source class) connect with the first inductance L1 after with the 23 pin (SFB of control chip ADN8831,Metal-oxide-semiconductor feedback control pin) it is connected,8th pin (NMOS tube drain electrode) ground connection,1st pin (PMOS source class) of the 2nd FDW2520 chip meets VCC (external power supply 5V),3rd pin (PMOS drain electrode) is connected with the 6th pin (NMOS tube drain electrode),6th pin (NMOS tube drain electrode) is connected with the 17th resistance R17 and is followed by the 28 pin (CS of ADN8831,Control current input pin).
In aforementioned H bridge power amplifier module, FDW2520 chip chosen by outside MOSFET pipe, is all integrated with the MOSFET of 1 N-channel and 1 P-channel inside every FDW2520.Switching output section passes through LC wave filter (by L1And C6Composition) filter the noise that switching frequency causes, linear output part then need not any peripheral circuit.The switching frequency of MOSFET pipe is provided by RC agitator internal in control chip ADN8831, and the pattern of agitator is self-excitation mode, by the 13rd foot FREQ by resistance R under self-excitation mode15(118k Ω) ground connection generates switching frequency, and switching frequency is 1MHz.
PID compensates network
In laser diode SPLLL90_3 temperature control circuit, PID compensation network includes control chip ADN8831, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3;nullWherein,First end of the 5th resistance R5 receives the 4th pin (OUT1 of control chip ADN8831,Error amplifies output pin),Second end receives the 6th pin (IN2M of control chip ADN8831,Compensate the forward pin of amplifier),First end of the 6th resistance R6 connects the 4th pin (OUT1 of control chip ADN8831,Error amplifies output pin),First pin of second termination the first electric capacity C1,6th pin (the IN2M of the first termination control chip ADN8831 of the 7th resistance R7,Compensate the forward pin of amplifier),Second end receives first end of the second electric capacity C2,6th end (the IN2M of the second termination control chip ADN8831 of the first electric capacity C1,Compensate the forward pin of amplifier),7th pin of the second termination control chip ADN8831 of the second electric capacity C2 compensates amplifier output pin OUT2,7th pin of the second termination control chip ADN8831 of the 3rd electric capacity C3 compensates amplifier output pin OUT2.
Aforementioned PID compensates network and is made up of control chip ADN8831 internal compensation amplifier CHOP2, peripheral resistance and electric capacity, R5And R7Control integration time constant, C1And R7Control derivative time constant, C3Compensate the stability of network.When choosing R5=100K Ω, R6=R7=249k Ω, C1=470nF, C2=1 μ F, C3=1nF, the voltage of the 7th pin OUT2 output is:
V OUT 2 = V TEMP - Z 2 Z 1 ( V OUT 1 - V TEMP ) - - - ( 3 )
In formula, VOUT1It is the output voltage of the 4th pin OUT1, VTEMPFor the corresponding voltage of design temperature, Z1It is the impedance between the 4th pin OUT1 and the 6th pin IN2N, Z2It it is the impedance between the 6th pin IN2N and the 7th pin OUT2.Error voltage, after PID network building out, sends into PWM controller, and PWM controller controls mosfet driver and drives the H-bridge circuit of outside, provides the electric current in different size and direction for thermoelectric refrigerator TEC.
Protection circuit
Laser diode SPLLL90_3 temperature control circuit is protected circuit by control chip ADN8831, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R14, the 18th resistance R18, the 19th resistance R19;nullWherein,9th pin (the AVDD of control chip ADN8831,Power pin) and 18 pin (PVDD,Power pin) it is connected to VCC (external power source 5V),12nd pin (AGND,Ground pin) and 22 pin (PGND,Ground pin) be connected ground connection,3rd pin (1N1M,The positive input of error amplifier) connect with the 13rd resistance R13 and to receive the 4th pin (OUT1,Error amplifier exports),8th pin (VREF,The reference voltage of output 2.5V) and the 8th resistance R8、11st resistance R11、First end of the 19th resistance R19 is connected,8th pin (the VREF of the 11st resistance R11 and the 12 resistance R12 series connection one termination control chip ADN8831,The reference voltage of output 2.5V),Other end ground connection,8th resistance R8、9th resistance R9 and the ten resistance R10 series connection one termination controls the 8th pin (VREF of core ADN8831,The reference voltage of output 2.5V),Other end ground connection,8th pin (the VREF of the 19th resistance R19 and the 18 resistance R18 series connection one termination control chip ADN8831,The reference voltage of output 2.5V),Other end ground connection.
Aforementioned protection circuit utilizes the internal relevant pins provided of control chip ADN8831, it is to avoid by the excessive damage causing thermoelectric refrigerator TEC and laser diode SPLLL90_3 of the electric current of thermoelectric refrigerator TEC.1st pin ILIMC and the 32 pin ILIMH of regulable control chip ADN8831 can arrange the maximum refrigeration of thermoelectric refrigerator TEC and add thermocurrent, regulates the 31st pin VLIM and can arrange the maximum voltage at thermoelectric refrigerator TEC two ends.

Claims (10)

1. a Gao Zhongying narrow-pulse laser radiating circuit, it is characterised in that include drive circuit and the temperature control circuit of laser diode;
Described drive circuit includes trigger signal source, on-off circuit and charge-discharge circuit;Drive circuit is by triggering signal control switch circuit Guan Bi, and then is launched frequency and the pulsewidth of laser by charge-discharge circuit control laser diode, it is achieved Gao Zhongying narrow-pulse laser is launched;
Described temperature control circuit includes thermoelectric refrigerator and the peripheral circuit based on control chip;Thermoelectric refrigerator and laser diode are affixed, and carry out temperature sensing, and gained temperature value is input to the peripheral circuit based on control chip;Peripheral circuit realizes the refrigeration control to thermoelectric refrigerator by control chip.
2. Gao Zhongying narrow-pulse laser radiating circuit as claimed in claim 1, it is characterised in that described drive circuit is at laser diode two ends parallel resistance and backward diode.
3. Gao Zhongying narrow-pulse laser radiating circuit as claimed in claim 2, it is characterized in that, described drive circuit includes charge voltage source, trigger signal source, the 20th resistance, the 21st resistance, the 22nd resistance, the 23rd resistance, the 24th resistance, the 25th resistance, the 9th electric capacity, the tenth electric capacity, the first high-frequency triode, the second high frequency triode, laser diode, the first commutation diode, the second commutation diode;Wherein,
Charge voltage source constitutes loop with the 21st resistance, the 9th electric capacity, laser diode, the 22nd resistant series;25th resistance is connected with the backward end of laser diode with the parallel connection of the second commutation diode and one end of the second commutation diode, other end ground connection;The colelctor electrode of the first high-frequency tube and the second end of the 21st resistance are connected, and the second end of its ground level and the tenth electric capacity is connected, its grounded emitter;Second end of the second high-frequency tube colelctor electrode and the 20th resistance is connected, and the colelctor electrode of its ground level and the first high-frequency tube is connected, and the second end of its emitter stage and the tenth electric capacity is connected;Trigger signal source accesses the forward end of the first commutation diode, and the negative end of the first commutation diode is connected with the first end of the tenth electric capacity, and the first end of the 21st resistance and the second end of the 20th resistance are connected;First end of the 23rd resistance and the negative end of the first commutation diode are connected, its second end ground connection;First end of the 24th resistance and the ground level of the first high-frequency tube are connected, its second end ground connection.
4. as claimed in claim 1 Gao Zhongying narrow-pulse laser radiating circuit, it is characterised in that laser diode is placed in thermostatic chamber, its cold end with thermoelectric refrigerator is affixed;Thermostatic chamber is manufactured by aluminium material and is formed.
5. as claimed in claim 1 Gao Zhongying narrow-pulse laser radiating circuit, it is characterised in that the described peripheral circuit based on control chip includes the temperature measuring circuit integrated with same control chip, control circuit, protection circuit;Temperature measuring circuit is for the temperature of real-time Laser Measurement diode;Control circuit is used for controlling thermoelectric refrigerator work;Protection circuit is used for controlling loop current, it is prevented that cause the damage of thermoelectric refrigerator and laser diode because electric current is excessive.
6. Gao Zhongying narrow-pulse laser radiating circuit as claimed in claim 5, it is characterised in that described temperature measuring circuit includes the first resistance, the second resistance, the 3rd resistance, the 4th resistance and variable resistance;First end of the first resistance and the first end of the 3rd resistance are all connected with reference voltage, the first resistance and ground connection after the second resistant series, the 3rd resistance and ground connection after the 4th resistance, variable resistance series connection.
7. Gao Zhongying narrow-pulse laser radiating circuit as claimed in claim 5; it is characterized in that, described protection circuit includes control chip, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance, the 12nd resistance, the 13rd resistance, the 18th resistance, the 19th resistance;Wherein,
The power pin of control chip connects external power source, ground pin ground connection, and the positive input of error amplifier and the 13rd resistant series receive error amplifier output, output reference voltage and the 8th resistance, the 11st resistance, the 19th resistance the first end be connected;The output reference voltage of a termination control chip, other end ground connection after 11st resistance and the 12nd resistant series;After 8th resistance, the 9th resistance and the tenth resistant series, a termination controls the output reference voltage of core, other end ground connection;The output reference voltage of a termination control chip, other end ground connection after 19th resistance and the 18th resistant series.
8. Gao Zhongying narrow-pulse laser radiating circuit as claimed in claim 5, it is characterised in that described control circuit includes error amplifier, H bridge power amplifier module, PID compensation network, PWM controller and mosfet driver;The magnitude of voltage of design temperature is compared generation error signal with the magnitude of voltage measuring temperature by error amplifier, error signal is amplified by H bridge power amplifier module, PID compensates network and obtains the temperature regulated quantity required for thermoelectric refrigerator according to error amount, and PWM controller produces corresponding control signal control mosfet driver according to temperature regulated quantity and drives thermoelectric refrigerator to regulate temperature.
9. Gao Zhongying narrow-pulse laser radiating circuit as claimed in claim 8, it is characterized in that, described H bridge power amplifier module includes control chip, thermoelectric refrigerator, a FDW2520 chip, the 2nd FDW2520 chip, the 14th resistance, the 15th resistance, the 16th resistance, the 17th resistance, the 5th electric capacity, the 6th electric capacity, the first inductance;Wherein,
nullThe inside crystal oscillator power pin of control chip connects external power source,Clock input pin and the 14th resistant series connect external power source,Start set of time pin and the 6th capacitances in series ground connection,Switching frequency arranges pin and the 15th resistant series ground connection,Temperature instruction pin is connected with LED forward ground connection,The output pin of the PMOS driving output pin and a FDW2520 chip of outside metal-oxide-semiconductor is connected,The switching signal pin of outside PMOS and the 16th resistant series receive the PMOS source class of a FDW2520 chip,The switch pin of outside NMOS and the NMOS tube output of a FDW2520 chip are connected,Metal-oxide-semiconductor feedback control pin and the 6th capacitances in series ground connection,The control pin of switching amplifier and the 5th capacitances in series ground connection,The PMOS output pin of PMOS Linear Driving output pin and the 2nd FDW2520 chip is connected,The NMOS tube output pin of NMOS tube Linear Driving output pin and the 2nd FDW2520 chip is connected,The PMOS source class of linear Feedback Control pin and the 2nd FDW2520 chip and NMOS tube source class are connected,Control current input pin to be connected with the forward end of thermoelectric refrigerator;
The PMOS drain electrode of the oneth FDW2520 chip connects external power source, and PMOS source class is connected with NMOS tube source class, and NMOS tube source class and the first inductance L1 are connected with the metal-oxide-semiconductor feedback control pin of control chip after connecting, NMOS tube grounded drain;
The PMOS source class of the 2nd FDW2520 chip connects external power supply, PMOS drain electrode with NMOS tube drain electrode be connected, NMOS tube drain electrode and the 17th resistant series be followed by control chip control current input pin.
10. Gao Zhongying narrow-pulse laser radiating circuit as claimed in claim 8, it is characterised in that described PID compensates network and includes control chip, the 5th resistance, the 6th resistance, the 7th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity;Wherein,
First end of the 5th resistance is received the error of control chip and is amplified output pin, and the second end receives the forward pin compensating amplifier of control chip;First end of the 6th resistance connects the error of control chip and amplifies output pin, the first pin of second termination the first electric capacity;The forward pin compensating amplifier of the first termination control chip of the 7th resistance, the second end receives the first end of the second electric capacity;The forward pin compensating amplifier of the second termination control chip of the first electric capacity;The compensation amplifier output pin of the second termination control chip of the second electric capacity;The compensation amplifier output pin of the second termination control chip of the 3rd electric capacity.
CN201410850113.0A 2014-12-31 2014-12-31 High repetition frequency narrow pulse laser emission circuit Pending CN105807269A (en)

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CN107453193A (en) * 2017-09-21 2017-12-08 中国科学院长春光学精密机械与物理研究所 The high efficiency temperature controlled circuit of laser based on thermoelectric cooling
KR101998327B1 (en) * 2018-05-29 2019-07-09 한국광기술원 Laser diode actuation circuit capable of generating short pulse and high constant current
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WO2020142955A1 (en) * 2019-01-09 2020-07-16 深圳市大疆创新科技有限公司 Ranging device and mobile platform

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