CN104198037B - Digital balance drive device - Google Patents
Digital balance drive device Download PDFInfo
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- CN104198037B CN104198037B CN201410459034.7A CN201410459034A CN104198037B CN 104198037 B CN104198037 B CN 104198037B CN 201410459034 A CN201410459034 A CN 201410459034A CN 104198037 B CN104198037 B CN 104198037B
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Abstract
The invention provides a kind of digital balance drive device pyroelectric detector in electronic calibrating thermal electron-releasing radiometer being carried out to electricity heating and performance number measurement, comprise the direct voltage output assembly be linked in sequence, analog to digital conversion assembly, micro-processing components, digital-to-analog conversion assembly and driving circuit, the d. c. voltage signal conversion electrical heating signal exported by direct voltage output assembly heats pyroelectric detector, in addition, micro-processing components is while modulating digital signal, the voltage magnitude of electrical heating signal can be read, in conjunction with the resistance of the inner heating resistor of pyroelectric detector, learn electrically heated performance number, make digital balance drive device provided by the invention, except the function of analog balance driver can be realized, simplify outside the complexity of circuit, power-measuring circuit can also be replaced, calculate electrical heating power size, thus simplify circuit system composition, make instrument to microminiaturization, miniaturization.
Description
Technical field
The invention belongs to electronic calibrating thermal electron-releasing radiometer, be specifically related to a kind of digital balance drive device for carrying out electricity heating and power measurement to pyroelectric detector.
Background technology
Electronic calibrating thermal electron-releasing radiometer is a kind of high precision absolute radiometer measuring optical radiation power, balance driver is an important component part in electrical calibrated pyroelectric radiometer, its effect is the electrical heating signal direct current signal compensating integrator output being changed into two-way waveform symmetry, alternating polarities, carries out electricity heating to detector.
The patent of invention of the patent No. to be CN100465594C and the patent No. be CN1821730A individually discloses a kind of photoelectric automatic balancing system of electronic calibrating thermal electron-releasing radiometer, become with balance driver bank by the prime amplifier connected successively, frequency-selecting amplifier, synchronous rectifier, compensation integrator, square-wave modulator, wherein, the amplification of light signal of prime amplifier for inputting; The fundamental frequency signal that frequency-selecting amplifier exports for amplifying prime amplifier, and filtering noise; Synchronous rectifier is used for transferring the signal be used for frequency-selecting amplifier exports to direct current signal; Compensate integrator to be used for carrying out integration to the signal of synchronous rectifier output; The signal that square-wave modulator is used for compensating integrator output is modulated; The signal that balance driver is used for square-wave modulator exports carries out power amplification; The patent No. is that the patent of CN100465594C also discloses data acquisition and power calculation system, for measure photoelectricity alternately add heat-sensing unit surface balance after electric power and obtain the size of radiant light power, its automatic-balancing system and power measuring system are two parts of segmentation mutually.
Summary of the invention
The invention provides a kind of digital balance drive device, except the function of analog balance driver can be realized, the power-measuring circuit in electrical calibrated pyroelectric radiometer can also be replaced, calculate electrical heating power size.
Present invention employs following technical scheme:
Digital balance drive device provided by the invention, has such feature, comprising: the analog to digital conversion assembly be linked in sequence, micro-processing components, digital-to-analog conversion assembly and driving circuit, and analog to digital conversion assembly is used for d. c. voltage signal to be converted to digital signal; The digital signal that micro-processing components is used for analog to digital conversion assembly exports is modulated, and digital signal is become alternating polarities digital signal; The alternating polarities digital signal that digital-to-analog conversion assembly is used for micro-processing components to export is converted to alternate mode analog signal; Driving circuit is used for alternating polarities simulating signal to heat as electrical heating signal pyroelectric detector, wherein, micro-processing components is while modulating digital signal, the voltage magnitude of electrical heating signal can be read, in conjunction with the resistance of the inner heating resistor of pyroelectric detector, learn electrically heated performance number.
Digital balance drive device provided by the invention, can also have such feature, also comprise: chopper, chopper exports synchronous reference signal, micro-processing components, under the effect of synchronous reference signal, is modulated the digital signal that analog to digital conversion assembly exports.
Digital balance drive device provided by the invention, such feature can also be had, also comprise: direct voltage output assembly, comprise the prime amplifier be linked in sequence, frequency-selecting amplifier, synchronous rectifier and compensation integrator, the input end of prime amplifier is connected with pyroelectric detector, for the amplification of the light signal by input, the fundamental frequency signal that frequency-selecting amplifier exports for amplifying prime amplifier, and filtering noise, the signal that synchronous rectifier is used for frequency-selecting amplifier exports transfers d. c. voltage signal to, compensate integrator to be used for carrying out integration to the signal of synchronous rectifier output.
Digital balance drive device provided by the invention, can also have such feature: driving circuit comprises driving circuit and incorgruous driving circuit in the same way, for alternating polarities simulating signal being become the electrical heating signal of two-way waveform symmetry, alternating polarities.
Digital balance drive device provided by the invention, can also have such feature: the method that analog to digital conversion assembly adopts multiple repairing weld average obtains the DC voltage value that direct voltage output assembly exports.
Invention effect and effect
The invention provides a kind of digital balance drive device for carrying out electricity heating and performance number measurement to the pyroelectric detector in electronic calibrating thermal electron-releasing radiometer, digital balance drive device comprises the direct voltage output assembly, analog to digital conversion assembly, micro-processing components, digital-to-analog conversion assembly and the driving circuit that are linked in sequence, wherein, the d. c. voltage signal that analog to digital conversion assembly is used for direct voltage output assembly exports is converted to digital signal, the digital signal that micro-processing components is used for analog to digital conversion assembly exports is modulated, and digital signal is become alternating polarities digital signal, the alternating polarities digital signal that digital-to-analog conversion assembly is used for micro-processing components to export is converted to alternate mode analog signal, driving circuit is used for alternating polarities simulating signal to heat as electrical heating signal pyroelectric detector, according to digital balance drive device provided by the invention, micro-processing components is while modulating digital signal, the voltage magnitude of electrical heating signal can be read, in conjunction with the resistance of the inner heating resistor of pyroelectric detector, learn electrically heated performance number, make digital balance driver provided by the invention, except the function of analog balance driver can be realized, simplify outside the complexity of circuit, the power-measuring circuit in electrical calibrated pyroelectric radiometer can also be replaced, calculate electrical heating power size, thus simplify circuit system composition, make instrument to microminiaturization, miniaturization.
Accompanying drawing explanation
Fig. 1 is the structural representation of electronic calibrating thermal electron-releasing radiometer of the present invention;
Fig. 2 is the structural representation of digital balance drive device of the present invention;
Fig. 3 is the signal waveforms of digital balance drive device of the present invention;
Fig. 4 is micro-processing components of the present invention carries out digital modulation process flow diagram to direct current signal;
Fig. 5 is driven in phase circuit theory diagrams of the present invention; And
Fig. 6 is anti-phase driving circuit principle figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
Fig. 1 is the structural representation of the electricity demarcation pyroelectricity radiometer in the present embodiment.
As shown in Figure 1, electronic calibrating thermal electron-releasing radiometer 100 comprises high stable optical chopper 200, pyroelectric detector 300 and digital balance drive device 400, high stable optical chopper 200 is for being irradiated to pyroelectric detector 300 after modulating light signal and providing reference signal for digital balance drive device 400, digital balance drive device 400 is connected with pyroelectric detector 300, light signal for being inputted by pyroelectric detector 300 is converted to electrical heating signal, automatically the electrical heating detector surface and the light heating detector surface that realize pyroelectric detector 300 have same effect, the performance number of electrical heating detector is tested simultaneously, and then obtain the performance number of optical radiation.
Fig. 2 is the structural representation of the digital balance drive device in the present embodiment.
As shown in Figure 2, digital balance drive device 400 comprises direct voltage output assembly 1, analog to digital conversion assembly 2, micro-processing components 3, digital-to-analog conversion assembly 4 and driving circuit 5, direct voltage output assembly 1 comprises the prime amplifier 11 be linked in sequence, frequency-selecting amplifier 12, synchronous rectifier 13 and compensation integrator 14, the input end of prime amplifier 11 is connected with pyroelectric detector 300, for the optical signal amplification by input, the fundamental frequency signal for amplifying prime amplifier 11 output of frequency-selecting amplifier 12, and filtering noise, synchronous rectifier 13 transfers d. c. voltage signal to for the signal exported by frequency-selecting amplifier 12, compensate integrator 14 and carry out integration for the signal exported synchronous rectifier 13.
The d. c. voltage signal carrying out self compensation integrator 14 output is converted to digital data transmission to micro-processing components 3 through analog to digital conversion assembly 2, under the synchronous reference signal effect that micro-processing components 3 exports at high stable optical chopper 200, the digital signal that analog to digital conversion assembly 2 exports is modulated, become the digital signal of alternating polarities, this digital signal becomes the simulating signal of alternating polarities after digital-to-analog conversion assembly 4, the simulating signal of alternating polarities after driven in phase circuit 51 and anti-phase driving circuit 52 as two-way waveform symmetry, the electrical heating signal of alternating polarities carries out electricity heating to pyroelectric detector 300.
Simultaneously, because the voltage magnitude size of electrical heating signal can be learnt when micro-processing components 3 carries out digital modulation, and the resistance R of the inner heating resistor of detector also by the instrument measurement of measuring resistance resistance out, therefore can pass through power and the relational expression between voltage and resistance: P=U in electricity
2/ R, is calculated electrically heated performance number size, and performance number is shown by display device.
Fig. 3 is the signal waveforms of the digital balance drive device in the present embodiment.
Fig. 4 is micro-processing components in the present embodiment carries out digital modulation process flow diagram to d. c. voltage signal.
As shown in Figure 3 and Figure 4, compensate the d. c. voltage signal of integrator 41 output as shown in Fig. 3 (a), d. c. voltage signal is converted to digital signal through analog to digital conversion assembly 2, and its voltage magnitude is V
1.The synchronous reference signal that Fig. 3 (b) exports for high stable optical chopper 300, micro-processing components 3 is under the effect of synchronous reference signal, and carry out digital modulation to d. c. voltage signal, modulated process is as follows:
Step S1-1:
By the initialization of micro-processing components 3;
Step S1-2:
Micro-processing components 3 controls analog to digital conversion assembly 2 and carries out data acquisition, and for improving precision, the method that analog to digital conversion assembly 2 adopts multiple repairing weld average obtains the DC voltage value that direct voltage output assembly 1 exports;
Step S1-3:
The rising edge of whether what micro-processing components 3 judged to detect be synchronous reference signal, if what detect is the rising edge of synchronous reference signal, enters step S1-4, if what detect is not the rising edge of synchronous reference signal, enters step S1-7;
Step S1-4:
When what micro-processing components 3 judgement detected is the rising edge of synchronous reference signal, judges that the signal detected is which is individual, if even number, enter step S1-5, if odd number, enter step S1-6;
Step S1-5:
Micro-processing components 3 drives digital-to-analog conversion assembly 4 output amplitude size to be V
1d. c. voltage signal;
Step S1-6:
Micro-processing components 3 drives digital-to-analogue Transformation cassette 4 output amplitude to be-V
1d. c. voltage signal;
Step S1-7:
The negative edge of whether what micro-processing components 3 judged to detect be synchronous reference signal, if what detect is the negative edge of synchronous reference signal, enter step S1-8, if what detect is not the negative edge of synchronous reference signal, enter step S1-2, again carry out data acquisition;
Step S1-8:
When micro-processing components 3 detects the negative edge of synchronous reference signal, digital-to-analog conversion assembly 4 output amplitude size is driven to be the d. c. voltage signal of zero.
The d. c. voltage signal that digital-to-analog conversion assembly 4 exports becomes the electrical heating voltage signal of two-way waveform symmetry, alternating polarities after driven in phase circuit 51 and anti-phase driving circuit 52, oscillogram is as shown in Fig. 3 (c) He Fig. 3 (d), both phase 180 °, the voltage magnitude being added in pyroelectric detector two ends is equivalent to 2V
1, the numerical value of the heating resistor R in pyroelectric detector is read by measurement instrument, and electrically heated performance number size is: P=U
2/ R=(2V
1)
2/ R.
Fig. 5 is the schematic diagram of the driven in phase circuit in the present embodiment.
As shown in Figure 5, VCC is power input, and VSS is circuit common ground end, R
1for feedback resistance, for increasing the stability of amplifier, prevent from feeding back deeply, cause concussion, driven in phase circuit 51 has high input impedance and extremely low output impedance, from " empty short " character of amplifier, and V
oUT=V
iN, meanwhile, output and importation isolated, avoid both crosstalks, its export waveform identical with Fig. 3 (c).
Fig. 6 is the schematic diagram of the anti-phase driving circuit in the present embodiment.
Anti-phase driving circuit 52 is by integrated operational amplifier 521 and resistance R
1, R
2, R
3, R
4composition, R
1=R
2, R
3∥ R
4=R
1∥ R
2, can be obtained by above condition, V
oUT=-V
iN, namely constrained input is contrary, and output waveform is as shown in Fig. 3 (d).
Analog to digital conversion assembly in the present embodiment is used for the voltage signal of simulation being converted to digital voltage signal; be convenient to micro-processing components and carry out data processing; for improving the precision of analog to digital conversion assembly; the voltage devices of high precision, low drifting should be used in circuit; in order to prevent because inputting, amplitude is too high causes damage to device; should add amplitude limiter circuit protection at selected analog to digital conversion component inputs, amplitude limit value should be less than or equal to reference voltage.
The digital modulation signals that micro-processing components exports is converted to the voltage signal of simulation by the digital-to-analog conversion assembly in the present embodiment, for improving the precision of digital-to-analog conversion assembly, should use the voltage devices of high precision, low drifting in circuit.
Embodiment effect and effect
Present embodiments provide a kind of digital balance drive device for carrying out electricity heating and performance number measurement to the pyroelectric detector in electronic calibrating thermal electron-releasing radiometer, digital balance drive device comprises the direct voltage output assembly, analog to digital conversion assembly, micro-processing components, digital-to-analog conversion assembly and the driving circuit that are linked in sequence, wherein, the d. c. voltage signal that analog to digital conversion assembly is used for direct voltage output assembly exports is converted to digital signal, the digital signal that micro-processing components is used for analog to digital conversion assembly exports is modulated, and digital signal is become alternating polarities digital signal, the alternating polarities digital signal that digital-to-analog conversion assembly is used for micro-processing components to export is converted to alternate mode analog signal, driving circuit is used for alternating polarities simulating signal to heat as electrical heating signal pyroelectric detector, according to the digital balance drive device that the present embodiment provides, micro-processing components is while modulating digital signal, the voltage magnitude of electrical heating signal can be read, in conjunction with the resistance of the inner heating resistor of pyroelectric detector, learn electrically heated performance number, the digital balance driver that the present embodiment is provided, except the function of analog balance driver can be realized, simplify outside the complexity of circuit, the power-measuring circuit in electrical calibrated pyroelectric radiometer can also be replaced, calculate electrical heating power size, thus simplify circuit system composition, make instrument to microminiaturization, miniaturization.
The invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various change to limit and in the spirit and scope of the present invention determined in described claim; these changes are apparent, and all innovation and creation utilizing the present invention to conceive are all at the row of protection.
Claims (3)
1. a digital balance drive device, for carrying out electricity heating and performance number measurement to the pyroelectric detector in electronic calibrating thermal electron-releasing radiometer, is characterized in that, comprising:
The direct voltage output assembly be linked in sequence, analog to digital conversion assembly, micro-processing components, digital-to-analog conversion assembly and driving circuit,
Described analog to digital conversion assembly is used for d. c. voltage signal to be converted to digital signal;
The described digital signal that described micro-processing components is used for described analog to digital conversion assembly exports is modulated, and described digital signal is become alternating polarities digital signal;
The described alternating polarities digital signal that described digital-to-analog conversion assembly is used for described micro-processing components exports is converted to alternating polarities simulating signal;
Described driving circuit is used for described alternating polarities simulating signal to heat as electrical heating signal pyroelectric detector,
Wherein, described direct voltage output assembly comprises the prime amplifier, frequency-selecting amplifier, synchronous rectifier and the compensation integrator that are linked in sequence, the input end of described prime amplifier is connected with described pyroelectric detector, for the optical signal amplification by input, the fundamental frequency signal that described frequency-selecting amplifier exports for amplifying described prime amplifier, and filtering noise, described synchronous rectifier is used for transferring the signal that described frequency-selecting amplifier exports to d. c. voltage signal, described compensation integrator is used for carrying out integration to the signal that described synchronous rectifier exports
Described micro-processing components, while modulating described digital signal, can read the voltage magnitude of described electrical heating signal, in conjunction with the resistance of the inner heating resistor of described pyroelectric detector, learns electrically heated performance number,
The input end of described analog to digital conversion assembly is provided with amplitude limiter circuit, and the amplitude limit value of described amplitude limiter circuit should be less than or equal to reference voltage.
2. digital balance drive device according to claim 1, is characterized in that, also comprise:
Wherein, described driving circuit comprises driven in phase circuit and driven out-of-phase circuit, and described driving circuit in the same way and described incorgruous driving circuit are used for the electrical heating signal described alternating polarities simulating signal being become two-way waveform symmetry, alternating polarities.
3. digital balance drive device according to claim 1, is characterized in that:
Wherein, described analog to digital conversion assembly adopts the average method of multiple repairing weld to obtain the DC voltage value of described direct voltage output assembly output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459034.7A CN104198037B (en) | 2014-09-10 | 2014-09-10 | Digital balance drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459034.7A CN104198037B (en) | 2014-09-10 | 2014-09-10 | Digital balance drive device |
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|---|---|
| CN104198037A CN104198037A (en) | 2014-12-10 |
| CN104198037B true CN104198037B (en) | 2016-03-23 |
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ID=52083365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410459034.7A Expired - Fee Related CN104198037B (en) | 2014-09-10 | 2014-09-10 | Digital balance drive device |
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| CN (1) | CN104198037B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354382B (en) * | 2019-07-30 | 2023-11-14 | 军事科学院系统工程研究院军需工程技术研究所 | Helmet integrated transcranial electric stimulation device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465594C (en) * | 2006-03-23 | 2009-03-04 | 上海理工大学 | UV enhanced electrical calibration pyroelectric radiometer |
| CN2876738Y (en) * | 2006-03-23 | 2007-03-07 | 上海理工大学 | Electrical calibrator for UV radiation testing |
| CN1821730A (en) * | 2006-03-23 | 2006-08-23 | 上海理工大学 | Photoelectric automatic balancing system of ultraviolet reinforced electric scaling radiometer |
| CN101246054A (en) * | 2008-03-18 | 2008-08-20 | 中国科学院长春光学精密机械与物理研究所 | An Electrically Substituted Absolute Radiometer |
| JP2011058861A (en) * | 2009-09-08 | 2011-03-24 | Panasonic Corp | Pyroelectric infrared detector |
| CN102435320B (en) * | 2011-10-13 | 2013-06-26 | 上海理工大学 | Digital automatic frequency locking photoelectric equivalent balance system of electrical calibration heat radiometer |
| CN103398783B (en) * | 2013-08-08 | 2015-07-22 | 上海理工大学 | Optical modulation device for electrical calibration pyroelectric radiometer, and control method thereof |
| CN204115865U (en) * | 2014-09-10 | 2015-01-21 | 上海理工大学 | Digital balance drive device |
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2014
- 2014-09-10 CN CN201410459034.7A patent/CN104198037B/en not_active Expired - Fee Related
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