CN104198037A - Digital balance drive device - Google Patents
Digital balance drive device Download PDFInfo
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- CN104198037A CN104198037A CN201410459034.7A CN201410459034A CN104198037A CN 104198037 A CN104198037 A CN 104198037A CN 201410459034 A CN201410459034 A CN 201410459034A CN 104198037 A CN104198037 A CN 104198037A
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Abstract
The invention provides a digital balance drive device used for performing electrical heating on a pyroelectric detector in an electrical calibration pyroelectric radiometer and power value measurement. The digital balance drive device comprises a direct-current voltage output component, an analog-to-digital conversion component, a micro-processing component, a digital-to-analog conversion component and a drive circuit which are all connected in sequence, and direct-current voltage signals outputted by the direct-current voltage output component are converted into electric heating signals to have the pyroelectric detector heated. In addition, the micro-processing component modulates digital signals and is capable of reading voltage amplitudes of the electric heating signals, and power values of electric heating can be acquired by combining resistance values of an internal heating resistor of the pyroelectric detector. By the digital balance drive device, the function of an analogued balance drive can be realized, complexity of the circuits is simplified, and a power-measuring circuit can be replaced to calculate the size of the electrical heating power, so that the system circuits are simplified, and instruments are miniaturized and minimized.
Description
Technical field
The invention belongs to electronic calibrating thermal electron-releasing radiometer, be specifically related to a kind of for pyroelectric detector being carried out to the digital balance drive device of electricity heating and power measurement.
Background technology
Electronic calibrating thermal electron-releasing radiometer is a kind of high precision absolute radiometer of measuring optical radiation power, balance driver is an important component part in electrical calibrated pyroelectric radiometer, its effect is the direct current signal of compensation integrator output to be changed into the electrical heating signal of two-way waveform symmetry, polarity alternation, to detector, carries out electricity heating.
The patent No. is the photoelectric automatic balancing system that patent of invention that CN100465594C and the patent No. are CN1821730A discloses respectively a kind of electronic calibrating thermal electron-releasing radiometer, by the prime amplifier connecting successively, frequency-selecting amplifier, synchronous rectifier, compensation integrator, square-wave modulator and balance driver bank, become, wherein, prime amplifier is for the amplification of the light signal inputted; Frequency-selecting amplifier is for amplifying the fundamental frequency signal of prime amplifier output, and filtering noise; Synchronous rectifier is for transferring the signal for frequency-selecting amplifier is exported to direct current signal; Compensation integrator is for carrying out integration to the signal of synchronous rectifier output; Square-wave modulator is for modulating the signal of compensation integrator output; Balance driver is for carrying out power amplification to the signal of square-wave modulator output; The patent No. is that the patent of CN100465594C also discloses data acquisition and power calculation system, for measuring that photoelectricity alternately adds the electric power after heat-sensing unit surface balance and the size that obtains radiant light power, its automatic-balancing system and power measuring system two parts for cutting apart mutually.
Summary of the invention
The invention provides a kind of digital balance drive device, except realizing the function of analog balance driver, can also replace the power-measuring circuit in electrical calibrated pyroelectric radiometer, calculate electrical heating power size.
The present invention has adopted following technical scheme:
Digital balance drive device provided by the invention, has such feature, comprising: the analog to digital conversion assembly being linked in sequence, micro-processing components, digital-to-analog conversion assembly and driving circuit, and analog to digital conversion assembly is for being converted to digital signal by d. c. voltage signal; Micro-processing components, for the digital signal of analog to digital conversion assembly output is modulated, becomes polarity alternation digital signal by digital signal; Digital-to-analog conversion assembly is for being converted to alternate mode analog signal by the polarity alternation digital signal of micro-processing components output; Driving circuit is for heating as electrical heating signal polarity alternate mode analog signal to pyroelectric detector, wherein, micro-processing components is when modulating digital signal, can read the voltage magnitude of electrical heating signal, in conjunction with the resistance of pyroelectric detector inside heating resistor, learn electrically heated performance number.
Digital balance drive device provided by the invention, can also there is such feature, also comprise: chopper, chopper output synchronous reference signal, micro-processing components, under the effect of synchronous reference signal, is modulated the digital signal of analog to digital conversion assembly output.
Digital balance drive device provided by the invention, can also there is such feature, also comprise: direct voltage output assembly, comprise the prime amplifier being linked in sequence, frequency-selecting amplifier, synchronous rectifier and compensation integrator, the input end of prime amplifier is connected with pyroelectric detector, be used for the amplification of the light signal of input, frequency-selecting amplifier is for amplifying the fundamental frequency signal of prime amplifier output, and filtering noise, synchronous rectifier is for transferring the signal of frequency-selecting amplifier output to d. c. voltage signal, compensation integrator is 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 polarity alternate mode analog signal being become to the electrical heating signal of two-way waveform symmetry, polarity alternation.
Digital balance drive device provided by the invention, can also have such feature: analog to digital conversion assembly adopts repeatedly the method for sample mean to obtain the DC voltage value of direct voltage output assembly output.
Invention effect and effect
The invention provides a kind of digital balance drive device of measuring for the pyroelectric detector of electronic calibrating thermal electron-releasing radiometer being carried out to electricity heating and performance number, digital balance drive device comprises direct voltage output assembly, analog to digital conversion assembly, micro-processing components, digital-to-analog conversion assembly and the driving circuit being linked in sequence, wherein, analog to digital conversion assembly is for being converted to digital signal by the d. c. voltage signal of direct voltage output assembly output, micro-processing components, for the digital signal of analog to digital conversion assembly output is modulated, becomes polarity alternation digital signal by digital signal, digital-to-analog conversion assembly is for being converted to alternate mode analog signal by the polarity alternation digital signal of micro-processing components output, driving circuit is for heating as electrical heating signal polarity alternate mode analog signal to pyroelectric detector, according to digital balance drive device provided by the invention, micro-processing components is when modulating digital signal, can read the voltage magnitude of electrical heating signal, resistance in conjunction with pyroelectric detector inside heating resistor, learn electrically heated performance number, make digital balance driver provided by the invention, except realizing the function of analog balance driver, simplify outside the complexity of circuit, can also replace the power-measuring circuit in electrical calibrated pyroelectric radiometer, calculate electrical heating power size, thereby simplifying circuit system forms, make instrument to microminiaturization, miniaturization development.
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 that micro-processing components of the present invention is carried out the process flow diagram of Digital Modulation 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 that the electricity in the present embodiment is demarcated pyroelectricity radiometer.
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 and providing reference signal for digital balance drive device 400 after light signal is modulated, digital balance drive device 400 is connected with pyroelectric detector 300, for the light signal of pyroelectric detector 300 inputs is converted to electrical heating signal, automatically electrical heating detector surface and the light heating detector surface of realizing pyroelectric detector 300 have same effect, the performance number of electrical heating detector is tested simultaneously, and then draw 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 being 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, be used for the optical signal amplification of input, the fundamental frequency signal of exporting for amplifying prime amplifier 11 of frequency-selecting amplifier 12, and filtering noise, synchronous rectifier 13 is for transferring the signal of frequency-selecting amplifier 12 outputs to d. c. voltage signal, compensation integrator 14 is for carrying out integration to the signal of synchronous rectifier 13 outputs.
Come the d. c. voltage signal of self compensation integrator 14 outputs to be converted to digital data transmission to micro-processing components 3 through analog to digital conversion assembly 2, micro-processing components 3 is under the synchronous reference signal effect of high stable optical chopper 200 outputs, digital signal to 2 outputs of analog to digital conversion assembly is modulated, become the digital signal of polarity alternation, this digital signal becomes the simulating signal of polarity alternation after digital-to-analog conversion assembly 4, the simulating signal of polarity alternation after driven in phase circuit 51 and anti-phase driving circuit 52 as two-way waveform symmetry, the electrical heating signal of polarity alternation 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 is carried out Digital Modulation, and the resistance R of the inner heating resistor of detector also can be by measuring resistance resistance instrument measurement out, therefore can be by the relational expression between power in electricity and voltage and resistance: P=U
2/ R, calculates electrically heated performance number size, and by display device, performance number is shown.
Fig. 3 is the signal waveforms of the digital balance drive device in the present embodiment.
Fig. 4 is that the micro-processing components in the present embodiment is carried out the process flow diagram of Digital Modulation to d. c. voltage signal.
As shown in Figure 3 and Figure 4, the d. c. voltage signal of compensation integrator 41 outputs is as shown in Fig. 3 (a), and d. c. voltage signal is converted to digital signal through analog to digital conversion assembly 2, and its voltage magnitude is V
1.Fig. 3 (b) is the synchronous reference signal of high stable optical chopper 300 outputs, and micro-processing components 3, under the effect of synchronous reference signal, is carried out Digital Modulation to d. c. voltage signal, and modulated process is as follows:
Step S1-1:
By micro-processing components 3 initialization;
Step S1-2:
Micro-processing components 3 is controlled analog to digital conversion assembly 2 and is carried out data acquisition, and for improving precision, analog to digital conversion assembly 2 adopts repeatedly the method for sample mean to obtain the DC voltage value of direct voltage output assembly 1 output;
Step S1-3:
Whether what 3 judgements of micro-processing components detected is the rising edge of 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:
3 judgements of micro-processing components detect while being the rising edge of synchronous reference signal, the signal that judgement detects be which, if even number enters step S1-5, if odd number enters step S1-6;
Step S1-5:
It is V that micro-processing components 3 drives digital-to-analog conversion assembly 4 output amplitude sizes
1d. c. voltage signal;
Step S1-6:
Micro-processing components 3 drives digital-to-analogue to transform assembly 4 output amplitudes
1d. c. voltage signal;
Step S1-7:
Whether what micro-processing components 3 judgements detected is the negative edge of 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, driving digital-to-analog conversion assembly 4 output amplitude sizes is zero d. c. voltage signal.
The d. c. voltage signal of digital-to-analog conversion assembly 4 outputs becomes the electrical heating voltage signal of two-way waveform symmetry, polarity alternation after driven in phase circuit 51 and anti-phase driving circuit 52, oscillogram is as shown in Fig. 3 (c) and Fig. 3 (d), 180 ° of both phase phasic differences, the voltage magnitude that is 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 dark, cause concussion, driven in phase circuit 51 has high input impedance and extremely low output impedance, from " empty short " character of amplifier, V
oUT=V
iN, meanwhile, output and importation are isolated, have avoided both crosstalking, and the waveform of its output is 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
4form R
1=R
2, R
3∥ R
4=R
1∥ R
2, by above condition, can be obtained V
oUT=-V
iN, i.e. input is contrary with output, 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 to be 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; in circuit, should use the Voltage Reference device of high precision, low drift; for preventing that amplitude is too high causes damage to device because inputting; at selected analog to digital conversion assembly input end, should add amplitude limiter circuit protection, amplitude limit value should be less than or equal to reference voltage.
Digital-to-analog conversion assembly in the present embodiment is converted to the digital modulation signals of micro-processing components output the voltage signal of simulation, for improving the precision of digital-to-analog conversion assembly, should use the Voltage Reference device of high precision, low drift in circuit.
Embodiment effect and effect
The present embodiment provides a kind of digital balance drive device of measuring for the pyroelectric detector of electronic calibrating thermal electron-releasing radiometer being carried out to electricity heating and performance number, digital balance drive device comprises direct voltage output assembly, analog to digital conversion assembly, micro-processing components, digital-to-analog conversion assembly and the driving circuit being linked in sequence, wherein, analog to digital conversion assembly is for being converted to digital signal by the d. c. voltage signal of direct voltage output assembly output, micro-processing components, for the digital signal of analog to digital conversion assembly output is modulated, becomes polarity alternation digital signal by digital signal, digital-to-analog conversion assembly is for being converted to alternate mode analog signal by the polarity alternation digital signal of micro-processing components output, driving circuit is for heating as electrical heating signal polarity alternate mode analog signal to pyroelectric detector, the digital balance drive device providing according to the present embodiment, micro-processing components is when modulating digital signal, can read the voltage magnitude of electrical heating signal, resistance in conjunction with pyroelectric detector inside heating resistor, learn electrically heated performance number, the digital balance driver that the present embodiment is provided, except realizing the function of analog balance driver, simplify outside the complexity of circuit, can also replace the power-measuring circuit in electrical calibrated pyroelectric radiometer, calculate electrical heating power size, thereby simplifying circuit system forms, make instrument to microminiaturization, miniaturization development.
The invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various variations described claim limit and definite the spirit and scope of the present invention in; these variations are apparent, and all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (5)
1. a digital balance drive device, measures for the pyroelectric detector of electronic calibrating thermal electron-releasing radiometer being carried out to electricity heating and performance number, it is characterized in that, comprising:
The analog to digital conversion assembly being linked in sequence, micro-processing components, digital-to-analog conversion assembly and driving circuit,
Described analog to digital conversion assembly is for being converted to digital signal by d. c. voltage signal;
Described micro-processing components, for the described digital signal of described analog to digital conversion assembly output is modulated, becomes polarity alternation digital signal by described digital signal;
Described digital-to-analog conversion assembly is for being converted to polarity alternate mode analog signal by the described polarity alternation digital signal of described micro-processing components output;
Described driving circuit is used for described polarity alternate mode analog signal as electrical heating signal, pyroelectric detector to be heated,
Wherein, described micro-processing components, when described digital signal is modulated, 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.
2. digital balance drive device according to claim 1, is characterized in that, also comprises:
Chopper, described chopper output synchronous reference signal, described micro-processing components, under the effect of described synchronous reference signal, is modulated the described digital signal of described analog to digital conversion assembly output.
3. digital balance drive device according to claim 1, is characterized in that, also comprises:
Direct voltage output assembly, comprise 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, be used for the optical signal amplification of input, described frequency-selecting amplifier is for amplifying the fundamental frequency signal of described prime amplifier output, and filtering noise, described synchronous rectifier is for transferring the signal of described frequency-selecting amplifier output to d. c. voltage signal, and described compensation integrator is for carrying out integration to the signal of described synchronous rectifier output.
4. digital balance drive device according to claim 1, is characterized in that:
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 for becoming described polarity alternate mode analog signal the electrical heating signal of two-way waveform symmetry, polarity alternation.
5. digital balance drive device according to claim 1, is characterized in that:
Wherein, described analog to digital conversion assembly adopts repeatedly the method for sample mean 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 |
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| 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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| Publication Number | Publication Date |
|---|---|
| CN104198037A true CN104198037A (en) | 2014-12-10 |
| CN104198037B CN104198037B (en) | 2016-03-23 |
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| 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354382A (en) * | 2019-07-30 | 2019-10-22 | 军事科学院系统工程研究院军需工程技术研究所 | A kind of integrated transcranial electrical stimulation device of the helmet |
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| CN110354382A (en) * | 2019-07-30 | 2019-10-22 | 军事科学院系统工程研究院军需工程技术研究所 | A kind of integrated transcranial electrical stimulation device of the helmet |
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