CN111289101B - Portable quadrant detector impulse response rate parameter calibration device - Google Patents
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Abstract
The invention discloses a portable quadrant detector pulse responsivity parameter calibration device, which comprises: the device comprises a light path switching module, a high-speed photoelectric detection module, a high-speed signal conditioning module, a narrow pulse peak value detection module, a precise AD conversion module, a detector installation adaptation module, a signal gating conditioning module, a precise peak value detection module, a high-speed AD conversion module, a comprehensive control module, a man-machine interaction module and a working power supply module; the method is used for field calibration of the quadrant detector, and realizes the calibration of the pulse response rate parameter of the quadrant detector by using the pulse light excitation light source of the quadrant detector parameter measuring device as an excitation light source in a production test field, wherein the pulse response rate measuring range is 2000V/W-200000V/W, and the measurement uncertainty is 6%. The method can effectively solve the problem that the pulse width difference of the excitation light source influences the pulse response rate value of the quadrant detector, and provides effective metering guarantee for scientific research and production of the quadrant detector.
Description
Technical Field
The invention belongs to the technical field of photoelectric detectors, and relates to a portable quadrant detector pulse response rate parameter calibration device for quadrant detector pulse response rate parameter calibration based on a peak detection technology.
Background
The pulse response rate parameter is a specific parameter of a guidance-type quadrant detector, a quadrant detector parameter measuring device is widely used for measuring the pulse response rate parameter in the production and inspection processes of the current quadrant detector, pulse laser is used as an excitation signal of the device, and the pulse response rate parameter measurement of the quadrant detector is realized by measuring the peak value of a response signal output by the quadrant detector and combining the peak power of an excitation light source. In order to evaluate the measurement capability of the quadrant detector parameter measurement device, a large-scale quadrant detector impulse response rate parameter calibration device is established in a laboratory by a related metering mechanism, the object limit detector impulse response rate parameter is calibrated, the quadrant detector is used as a quantity value transmission medium, and the calibration and tracing of the quadrant detector parameter measurement device are realized by combining a comparison measurement method. Because the pulse response rate parameter value of the quadrant detector is closely related to the pulse width of the excitation light source, and the pulse widths of the excitation light source used by the pulse response rate parameter calibration device of the quadrant detector and the pulse width of the excitation light source used by the pulse response rate parameter measurement device of the quadrant detector are different, the comparison test calibration result has large nonlinear difference, the values are difficult to unify, and the calibration result is difficult to objectively reflect the measurement capability of the parameter measurement device of the quadrant detector.
If the quadrant detector impulse response rate parameter calibration device adopts a portable design, field calibration can be carried out, the impulse response rate of the quadrant detector measuring device under the excitation of the light source is calibrated by using the excitation light source of the quadrant detector measuring device as the excitation light source object limit detector, the nonlinear difference of the magnitude values caused by inconsistent pulse widths of excitation signals in comparison and measurement of the quadrant detector measuring device can be effectively eliminated, the uniformity of the magnitude values is realized, the problem that the existing quadrant detector measuring device is difficult to calibrate is solved, and the device has great significance for perfecting the metering system of the quadrant detector. The present invention has been made to solve the above problems.
Disclosure of Invention
Objects of the invention
The purpose of the invention is: aiming at the defects in the prior art, the portable quadrant detector impulse response rate parameter calibration device based on the peak detection technology is provided for field calibration; the pulse light source of the quadrant detector measuring device is used as an excitation light source in a detector production test field, the pulse response rate parameter calibration of the object limit detector under the pulse light excitation is realized, the pulse response rate measurement range is 2000V/W-200000V/W, and the measurement uncertainty is 6% (k is 2).
(II) technical scheme
In order to solve the technical problem, the invention provides a portable quadrant detector pulse responsivity parameter calibration device, which comprises a light path switching module 1, a high-speed photoelectric detection module 2, a high-speed signal conditioning module 3, a narrow pulse peak detection module 4, a precision AD conversion module 5, a detector installation adaptation module 6, a signal gating conditioning module 7, a precision peak detection module 8, a high-speed AD conversion module 9, a comprehensive control module 10, a man-machine interaction module 11 and a working power supply module 12; the high-speed photoelectric detection module 2 is sequentially connected with a high-speed signal conditioning module 3, a narrow pulse peak detection module 4, a precision AD conversion module 5 and a comprehensive control module 10, and the detector installation adaptation module 6 is connected with a signal gating conditioning module 7 and is tightly connected with a calibrated quadrant detector pin through a connector; the signal gating conditioning module 7 is sequentially connected with a precision peak value detection module 8, a high-speed AD conversion module 9 and a comprehensive control module 10; the comprehensive control module 10 is connected with a human-computer interaction module 11, a light path switching module 1 and a power supply module 12; the pulse response rate parameter calibration of the quadrant detector is realized by measuring the excitation laser peak power and the quadrant detector response signal peak voltage;
when the light path switcher 1 controls the exciting pulse laser signal to be incident to the high-speed photoelectric detection module 1, the response rate of the high-speed photoelectric detector is R, and a response voltage signal V is output ref And input to the high-speed signal conditioning module 2. The high-speed signal conditioning module 2 responds to the response signal V ref The amplitude value of the voltage signal is dynamically adjusted to amplify and filter the signal, and the voltage signal V with the amplitude value range of 200 mV-2V is output ref_Amp And input into a narrow pulse peak detection module 4. After the narrow pulse peak value detection module 4 detects the peak value voltage of the input signal, the amplitude value and V are output ref_Amp Quasi-continuous signals with consistent peak values are input into a precise AD conversion module 5. The precision AD conversion module 5 carries out 16bits high-precision analog-to-digital conversion on the input voltage signal and measures the amplitude V of the voltage signal pkk And input to the integrated control module 10. The integrated control module 10 calculates the peak power P of the excitation pulse laser according to the data input by the precision AD conversion module 5 and the high-speed photoelectric detector response rate R and the high-speed signal conditioning module amplification factor beta pk ＝V pkk (β × R), whose measurement uncertainty was calibrated by sending to the relevant calibration facility, and whose value was u 1-2.5%;
when the light path switcher 1 controls the excitation pulse laser signal to be incident to the ith quadrant of the calibrated quadrant detector, the signal gating conditioning module 7 gates a channel corresponding to the ith quadrant, conditions and amplifies the response signal of the ith quadrant of the quadrant detector, the amplification factor is Amp, and outputs a corresponding signal V i Inputting the signal into a precise peak detection module 8, wherein the precise peak detection module 8 detects the peak voltage of the input signal and keeps the peak voltage, and the amplitude of the output response signal is equal to V i The quasi step signals with the same peak value are input to the high-speed AD conversion module 9. The high-speed AD conversion module 9 carries out 14bits high-speed analog-to-digital conversion on the input voltage signal to measure the ith quadrant response signal peak value V of the quadrant detector pk_k_i The uncertainty of the measurement was evaluated by the class a evaluation method, and the value was 1.5% to u 2. The measurement results are input to the integrated control module 10.
(III) advantageous effects
The portable quadrant detector pulse response rate parameter calibration device provided by the technical scheme can avoid the influence of the pulse width difference of the excitation light source on the pulse response rate magnitude of the quadrant detector, effectively eliminates the magnitude nonlinear difference caused by the inconsistent pulse widths of the excitation signals in the comparison and calibration test of the quadrant detector measuring device, and realizes the uniformity of the magnitudes.
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FIG. 1 is a block diagram of a portable quadrant detector parameter calibration apparatus provided by the present invention.
Fig. 2 is a circuit diagram of a precise peak detection module provided by the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
As shown in fig. 1, the portable quadrant detector impulse response rate parameter calibration device of the present invention includes an optical path switching module 1, a high-speed photoelectric detection module 2, a high-speed signal conditioning module 3, a narrow pulse peak detection module 4, a precision AD conversion module 5, a detector installation adaptation module 6, a signal gating conditioning module 7, a precision peak detection module 8, a high-speed AD conversion module 9, a comprehensive control module 10, a human-computer interaction module 11, and a working power supply module 12; the high-speed photoelectric detection module 2 is sequentially connected with a high-speed signal conditioning module 3, a narrow pulse peak detection module 4, a precision AD conversion module 5 and a comprehensive control module 10, and the detector installation adaptation module 6 is connected with a signal gating conditioning module 7 and is tightly connected with a calibrated quadrant detector pin through a connector; the signal gating conditioning module 7 is sequentially connected with a precision peak value detection module 8, a high-speed AD conversion module 9 and a comprehensive control module 10; the comprehensive control module 10 is connected with a human-computer interaction module 11, a light path switching module 1 and a power supply module 12; and the pulse response rate parameter calibration of the quadrant detector is realized by measuring the excitation laser peak power and the quadrant detector response signal peak voltage.
The light path switching module 1 is connected with the comprehensive control module 10, and controls the excitation light signal to alternately enter the high-speed photoelectric detection module and the calibrated detector at the switching frequency of 10Hz, so that the quasi-real-time monitoring of the peak power of the excitation light is realized.
The high-speed photoelectric detection module 2 is sequentially connected with a high-speed signal conditioning module 3, a narrow pulse peak detection module 4, a precise AD conversion module 5 and a comprehensive control module 10, and is used for precisely measuring the peak power of a pulse excitation light source with the pulse width larger than 10ns and the peak power range of 2 muW-200 muW.
The detector installation adaptation module 6 is sequentially connected with the signal gating conditioning module 7, the precise peak value detection module 8, the high-speed AD conversion module 9 and the comprehensive control module 10, so that the accurate measurement of the response signal peak value of the quadrant detector with the rise time of more than 50ns and the amplitude range of 20 mV-2V is realized, and the response signal voltage or current peak value of the quadrant detector is accurately measured.
The integrated control module 10 is used for measuring the peak power P of the excitation laser k Voltage peak value V of response signal of quadrant detector pk_k_i And an amplification factor A mp Calculating the impulse response rate parameter R of the quadrant detector i_plus ＝V pk_k_i /(A mp ×P pk ) Therefore, the pulse response rate parameter calibration of the quadrant detector is realized.
Wherein, the optical path switching module 1 includes: the focusing lens group, the plane mirror, the rotary solenoid and the driving circuit, wherein the focal length of the focusing lens group is 35mm, and the area of the plane mirror is phi 12.7 mm. The high-speed photoelectric detection module 2 comprises: the high-speed photoelectric detector comprises a high-speed photoelectric detector, a pre-amplification circuit, a temperature monitoring feedback circuit and a bias voltage amplitude regulating circuit, wherein the high-speed photoelectric detector adopts a Si-based photoelectric detector, the photosensitive surface is phi 1mm, and the typical value of the rise time is less than 1 ns; the temperature monitoring module adopts a temperature sensor with the temperature resolution ratio smaller than 0.1K to measure the temperature, adjusts the amplitude of the bias voltage according to the temperature measurement result and eliminates the influence of the temperature change on the response capability of the detector. The high-speed signal conditioning module 3 includes: the gain adjustable amplifier circuit comprises a gain adjustable amplifier circuit and a filter circuit, wherein the bandwidth of the amplifier circuit is larger than 350 MHz. The narrow pulse peak detection module 4 adopts a high-speed comparison circuit and a capacitor charging and discharging circuit to realize the voltage peak detection and peak voltage holding of the pulse signal with the pulse width larger than 10 ns. In the precision AD conversion module 5, a single-channel AD conversion chip is adopted to be assisted by a known peripheral circuit, and the resolution ratio is 16 bits. The detector mounting adapter module 6 adopts a replaceable design and provides a plurality of different types of replaceable sockets so as to meet the mounting requirements of different types of detectors. In the signal gating and conditioning module 7, 8-path signal gating and conditioning are realized by adopting a relay and a standard well-known peripheral circuit. The precision peak detection module 8 includes: the peak detection circuit and the trigger/reset circuit can realize the voltage peak detection and peak voltage holding of the pulse signal with the pulse width larger than 50 ns. In the high-speed AD conversion module 9, a single-channel AD conversion chip is used with a known peripheral circuit, the resolution is 14bits, and the maximum conversion rate is 1 MHz. The integrated control module 10 adopts a high-performance MCU chip, a CPLD chip, a standard working power supply and a known peripheral circuit. The human-computer interaction interface 11 comprises an LCD display screen, keys and a serial port communication interface. In the working power supply module 12, a DC-DC power supply module is adopted to be assisted by a known peripheral circuit, and power supply voltages of +/-5V, +3V, + 12V and-300V are output.
In the portable quadrant detector parameter calibration device, a calibrated detector is connected with a multichannel gating conditioning module 4 through a connector tool. When the light path switcher 1 controls the exciting pulse laser signal to be incident to the high-speed photoelectric detection module 1, the response rate of the high-speed photoelectric detector is R, and a response voltage signal V is output ref And input to the high-speed signal conditioning module 2. The high-speed signal conditioning module 2 responds to the response signal V ref The amplitude value of the voltage signal is dynamically adjusted to amplify and filter the signal, and the voltage signal V with the amplitude value range of 200 mV-2V is output ref_Amp And input into a narrow pulse peak detection module 4. After the narrow pulse peak detection module 4 detects the peak voltage of the input signal, the amplitude and V are output ref_Amp Quasi-continuous signals with consistent peak values are input into a precise AD conversion module 5. The precision AD conversion module 5 carries out 16bits high-precision analog-to-digital conversion on the input voltage signal and measures the amplitude V of the voltage signal pkk And input to the integrated control module 10. The integrated control module 10 calculates the peak power P of the excitation pulse laser according to the data input by the precision AD conversion module 5 and the high-speed photoelectric detector response rate R and the high-speed signal conditioning module amplification factor beta pk ＝V pkk /(. beta.times.R), the uncertainty of its measurement is calibrated by sending it to the relevant calibration facility, and its value is u 1 ＝2.5％。
When the light path switcher 1 controls the excitation pulse laser signal to be incident to the ith quadrant of the calibrated quadrant detector, the signal gating conditioning module 7 gates a channel corresponding to the ith quadrant, and conditions and amplifies the response signal of the ith quadrant of the quadrant detector, wherein the amplification factor is A mp Outputs a corresponding signal V i Inputting the signal into a precise peak detection module 8, wherein the precise peak detection module 8 detects the peak voltage of the input signal and keeps the peak voltage, and the amplitude of the output response signal is equal to V i The quasi step signals with the same peak value are input to the high-speed AD conversion module 9. The high-speed AD conversion module 9 carries out 14bits high-speed analog-to-digital conversion on the input voltage signal to measure the ith quadrant response signal peak value V of the quadrant detector pk_k_i The uncertainty of the measurement is evaluated by the class A evaluation method and has a value of u 2 ＝1.5％。The measurement results are input to the integrated control module 10.
The integrated control module 10 is used for measuring the peak power of the excitation pulse laser and the peak power P of the excitation pulse laser pk And the ith quadrant response signal peak value V of the quadrant detector pk_k_i Calculating the i-th quadrant impulse response rate R i_plus ＝V pk_k_i /(A mp ×P pk ) Which measures the uncertainty U re l＝6％(k＝2)。
The technical proposal shows that the portable quadrant detector parameter calibration device adopts portable miniaturization design, is convenient for field calibration, utilizes the pulse excitation light source of the quadrant detector parameter measurement device as an excitation light source, the high-speed signal conditioning module, the narrow pulse peak value detection module, the precise AD conversion module and the comprehensive control module are sequentially connected through the high-speed photoelectric detection module to accurately measure the peak power of the excitation light source, meanwhile, the calibrated quadrant detector is rigidly connected with the detector installation adaptation module, and is sequentially connected with the signal gating conditioning module, the precise peak detection module, the high-speed AD conversion module and the comprehensive control module to accurately measure the voltage peak value of the response signal of the quadrant detector, calculate the pulse response rate parameter of the quadrant detector and realize the pulse response rate parameter calibration of the quadrant detector under the specific pulse excitation. The influence of the pulse width difference of the excitation light source on the pulse response rate magnitude of the quadrant detector is avoided, the nonlinear magnitude difference caused by inconsistent pulse widths of the excitation signals in the comparison calibration test of the quadrant detector measuring device is effectively eliminated, and the magnitude unification is realized. The problem that the existing quadrant detector measuring device is difficult to calibrate is solved, and effective metering guarantee is provided for scientific research and production of the quadrant detector.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A portable quadrant detector pulse responsivity parameter calibration device is characterized by comprising a light path switching module (1), a high-speed photoelectric detection module (2), a high-speed signal conditioning module (3), a narrow pulse peak detection module (4), a precise AD conversion module (5), a detector installation adaptation module (6), a signal gating conditioning module (7), a precise peak detection module (8), a high-speed AD conversion module (9), a comprehensive control module (10), a man-machine interaction module (11) and a working power supply module (12); the high-speed photoelectric detection module (2) is sequentially connected with a high-speed signal conditioning module (3), a narrow pulse peak detection module (4), a precision AD conversion module (5) and a comprehensive control module (10), and the detector installation adaptation module (6) is connected with a signal gating conditioning module (7) and is tightly connected with the pins of the calibrated quadrant detector through a connector; the signal gating conditioning module (7) is sequentially connected with the precision peak value detection module (8), the high-speed AD conversion module (9) and the comprehensive control module (10); the comprehensive control module (10) is connected with a human-computer interaction module (11), a light path switching module (1) and a working power supply module (12); the pulse response rate parameter calibration of the calibrated quadrant detector is realized by measuring the excitation laser peak power and the calibrated quadrant detector response signal peak voltage;
when the light path switching module (1) controls the exciting pulse laser signal to be incident to the high-speed photoelectric detection module (2), the response rate of the high-speed photoelectric detector is R, and a response voltage signal V is output ref The input signal is input into a high-speed signal conditioning module (3); the high-speed signal conditioning module (3) is used for conditioning the high-speed signal according to the response signal V ref The amplitude value of the voltage signal is dynamically adjusted to amplify and filter the signal, and the voltage signal V with the amplitude value range of 200 mV-2V is output ref_Amp The input narrow pulse peak value detection module (4); after the narrow pulse peak value detection module (4) detects the peak voltage of the input signal, the amplitude and V are output ref_Amp Quasi-continuous signals with consistent peak values are input into a precise AD conversion module (5); the precision AD conversion module (5) carries out 16bits high-precision analog-to-digital conversion on the input voltage signal and measures the amplitude V of the voltage signal pkk And input into the integrated control module (10); the comprehensive control module (10) calculates the peak value of the excitation pulse laser according to the data input by the precise AD conversion module (5) and by combining the response rate R of the high-speed photoelectric detector and the amplification factor beta of the high-speed signal conditioning modulePower P pk ＝V pkk (β × R), whose measurement uncertainty was calibrated by sending to the relevant calibration facility, and whose value was u 1-2.5%;
when the light path switching module (1) controls the excitation pulse laser signal to be incident to the ith quadrant of the calibrated quadrant detector, the signal gating conditioning module (7) gates a channel corresponding to the ith quadrant, conditions and amplifies the response signal of the ith quadrant of the calibrated quadrant detector, the amplification factor is Amp, and outputs a corresponding signal V i The input signal is input into a precise peak value detection module (8), the precise peak value detection module (8) detects the peak value voltage of the input signal and keeps the peak value voltage, and the amplitude of the output response signal is equal to V i Quasi step signals with equal peak values are input to a high-speed AD conversion module (9); the high-speed AD conversion module (9) carries out 14bits high-speed analog-to-digital conversion on the input voltage signal to measure the ith quadrant response signal peak value V of the calibrated quadrant detector pk_k_i The uncertainty of the measurement is evaluated by a class A evaluation method, the value of the uncertainty is u 2-1.5%, and the measurement result is input into the integrated control module (10).
2. The pulse responsivity parameter calibration device of the portable quadrant detector as claimed in claim 1, wherein the optical path switching module (1) is connected to the comprehensive control module (10) and controls the excitation light signal to alternately enter the high-speed photoelectric detection module (2) and the calibrated quadrant detector at a switching frequency of 10Hz, so as to realize quasi-real-time monitoring of the peak power of the excitation light.
3. The pulse responsivity parameter calibration device of the portable quadrant detector as claimed in claim 2, wherein the high-speed photoelectric detection module (2) is connected with the high-speed signal conditioning module (3), the narrow pulse peak detection module (4), the precise AD conversion module (5) and the comprehensive control module (10) in sequence, and measures the peak power of the pulse excitation light source with the pulse width larger than 10ns and the peak power range of 2 μ W-200 μ W.
4. The pulse responsivity parameter calibration device of the portable quadrant detector according to claim 3, characterized in that the detector installation adaptation module (6) is sequentially connected with the signal gating conditioning module (7), the precise peak detection module (8), the high-speed AD conversion module (9) and the comprehensive control module (10) to realize measurement of the voltage or current peak value of the response signal of the quadrant detector with the rise time of more than 50ns and the amplitude range of 20 mV-2V.
5. The portable quadrant detector impulse response rate parameter calibration apparatus according to claim 4, wherein the optical path switching module (1) comprises: the focusing lens group, the plane mirror, the rotary solenoid and the driving circuit, wherein the focal length of the focusing lens group is 35mm, and the area of the plane mirror is phi 12.7 mm.
6. The portable quadrant detector impulse response rate parameter calibration device according to claim 5, characterized in that the high-speed photodetection module (2) comprises: the high-speed photoelectric detector comprises a high-speed photoelectric detector, a pre-amplification circuit, a temperature monitoring feedback circuit and a bias voltage amplitude regulating circuit, wherein the high-speed photoelectric detector adopts a Si-based photoelectric detector, the photosensitive surface is phi 1mm, and the typical value of the rise time is less than 1 ns; the temperature monitoring feedback circuit adopts a temperature sensor with the temperature resolution ratio smaller than 0.1K to measure the temperature, and adjusts the amplitude of the bias voltage according to the temperature measurement result to eliminate the influence of the temperature change on the response capability of the detector.
7. The portable quadrant detector impulse response rate parameter calibration device according to claim 6, characterized in that the high speed signal conditioning module (3) comprises: the gain adjustable amplifier circuit comprises a gain adjustable amplifier circuit and a filter circuit, wherein the bandwidth of the amplifier circuit is more than 350 MHz; the narrow pulse peak value detection module (4) adopts a high-speed comparison circuit and a capacitor charging and discharging circuit to realize the voltage peak value detection and peak value voltage holding of a pulse signal with the pulse width larger than 10 ns; in the precise AD conversion module (5), a single-channel AD conversion chip is adopted to be assisted by a known peripheral circuit, and the resolution ratio is 16 bits; the signal gating and conditioning module (7) adopts a relay and a standard well-known peripheral circuit to realize 8-path signal gating and conditioning.
8. The portable quadrant detector pulse responsivity parameter calibration apparatus according to claim 7, wherein the precise peak detection module (8) comprises a peak detection circuit and a trigger/reset circuit, and realizes pulse signal voltage peak detection and peak voltage holding with pulse width larger than 50 ns; the high-speed AD conversion module (9) adopts a single-channel AD conversion chip and a known peripheral circuit, the resolution ratio is 14bits, and the maximum conversion rate is 1 MHz.
9. The portable quadrant detector impulse response rate parameter calibration device according to claim 8, characterized in that the human-computer interaction module (11) comprises an LCD display screen, keys and a serial port communication interface; the working power supply module (12) adopts a DC-DC power supply module and a known peripheral circuit to output power supply voltages of +/-5V, +3V, + 12V and-300V.
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