CN100427903C - Light irradiance measuring method for implementing temperature compensation on electric calibration absolute radiometer - Google Patents
Light irradiance measuring method for implementing temperature compensation on electric calibration absolute radiometer Download PDFInfo
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- CN100427903C CN100427903C CNB2005100166671A CN200510016667A CN100427903C CN 100427903 C CN100427903 C CN 100427903C CN B2005100166671 A CNB2005100166671 A CN B2005100166671A CN 200510016667 A CN200510016667 A CN 200510016667A CN 100427903 C CN100427903 C CN 100427903C
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Abstract
The present invention relates to a light irradiance measuring method for implementing temperature compensation on an electric calibration absolute radiometer. A shutter is closed, and a first electrical heating wire of a receiver and a second electrical heating wire of a parametric device respectively add electrical power Pe1, so the temperature of the receiver and the temperature of the parametric device are always identical and constant; the shutter is opened, when light is irradiated on an absolute radiometer, the electrical power added on the first electrical heating wire is reduced from Pe1 to Pe2, and the output numerical value of a temperature sensor circuit is equal to the output numerical value of the temperature sensor circuit when the shutter is closed; when the shutter is opened, the total power Pe1 of the receiver is Po+Pe2, the incident light power Po=Pe1-Pe2, and the incident irradiation E: E=Po/A. The measuring balancing time of the present invention is shortened, and the measuring period is shortened. Because the temperature of the receiver slightly fluctuates up and down on the same temperature in measurement, and the receiver and the parametric device which are in the identical temperature are in closer environmental temperature and state; thus, the compensation effect is good, and the measurement precision is enhanced. The present invention can be used for optical radiation measurement.
Description
Technical field:
The present invention relates to optical radiation energy meter technical field, relate to the method for utilizing electric calibration absolute radiometer measuring light irradiance.
Background technology:
When light irradiance is measured, generally be to adopt the electric calibration absolute radiometer that light irradiance is measured.The basic physical principle of electric calibration absolute radiometer: be on its receiving device, electrical heating wire to be set, when absolute radiometer being added the incident light time, make receiving device receive the optical radiation of incident, if the luminous power of incident is Po (the observation stage), be warmed up to maximal value through a period of time receiving device, receiving device and the heat sink thermal equilibrium that reaches, record temperature sensor circuit output numerical value; Close shutter (electric calibration stage) then, be adjusted at that institute adds electric power on the electrical heating wire of receiving device, again through the time identical with the observation stage, make receiving device and the heat sink thermal equilibrium that reaches, the temperature balance of receiving device is in the identical temperature of intensification value with the observation stage, i.e. electricity calibration phase temperature sensor circuit output numerical value equates with observation phase temperature sensor circuit output numerical value, then adds the optical radiation power Po that electrical power P e just equals (observation stage) incident on (electric calibration stage) electrical heating wire.
P
o＝P
e……(1)
Absolute radiometer also design one with receiving device accurate parametric device of symmetry on quality, structure, parametric device also has electrical heating wire and temperature sensor, the temperature sensor of receiving device oppositely is connected with the temperature sensor of parametric device, the temperature sensor output of the temperature sensor of receiving device and parametric device changes to a direction simultaneously when making the heat sink temperature drift, these two variations are cancelled out each other, and play and reduce the heat sink temperature drift to carry out the influence of light irradiance measurement result with absolute radiometer as far as possible.
Method parametric device in measuring process that above-mentioned absolute radiometer carries out the light irradiance measurement does not receive optical radiation, the electrical heating wire of parametric device does not heat yet, so parametric device maintains on the identical temperature with heat sink in whole measuring process, and receiving device maintains and is higher than on the heat sink temperature owing to receive light or electrical heating always, receiving device is in different temperature with parametric device always as a result, so compensation effect is bad.
Summary of the invention:
When adopting the electric calibration absolute radiometer to measure in order to solve the above-mentioned background technology, the electrical heating wire of parametric device does not heat in the absolute radiometer, when making absolute radiometer reach thermal equilibrium, receiving device is different with the temperature of parametric device, thereby need long heat balance time, the receiving device of absolute radiometer is different with the parametric device temperature, thereby make effect temperature compensation bad, make the problem that the light irradiance measuring accuracy is low, for this reason, the objective of the invention is to provide a kind of heat balance time short, receiving device is identical with the parametric device temperature, effect temperature compensation is good, the light irradiance measuring method that the electric calibration absolute radiometer is carried out temperature compensation that measuring accuracy is high.
The process of measuring light irradiance of the present invention is as follows:
A. close shutter, on second electrical heating wire of first electrical heating wire of receiving device and parametric device, add electrical power P e respectively
1, be called the electric calibration stage, make the temperature of receiving device and parametric device identical all the time and keep constantly, the above-mentioned institute of record added electrical power P e when receiving device, parametric device and heat sink temperature reached balance
1, the output numerical value of the temperature sensor circuit of while recorder device and parametric device;
B. open shutter, as the timing of light incident absolute radiation, be called the observation stage, at this moment, second electric power that electrical heating wire adds is kept constant, regulates the electrical power P e that reduces step a first electrical heating wire
1Make receiving device, parametric device and heat sink temperature reach balance, even the temperature sensor circuit in electric calibration stage is exported numerical value and is equated that at this moment, first electric power that electrical heating wire adds of receiving device is by Pe among the temperature sensor circuit output numerical value in observation stage and the step a
1Reduce to Pe
2
The luminous power of c. establishing the receiving device reception of observation stage is Po, and therefore, the general power that receiving device receives in observation time is Po+Pe
2, by formula
Po+Pe
2＝Pe
1……(2)
Can try to achieve the luminous power of incident
Po＝Pe
1-Pe
2……(3)
Luminous power Po obtains the light irradiance E of incident divided by key light door screen area A:
E＝Po/A……(4)
Good effect of the present invention: because the receiving device and the parametric device of the present invention's absolute radiometer in whole measuring process all heat, add identical electric power, keeping the temperature of receiving device and parametric device keeps constant all the time, maintain and be higher than on the heat sink identical temperature, so measuring equilibration time shortens, because receiving device and parametric device are in uniform temp, thereby make receiving device and parametric device be in more approaching environment temperature and state, so improved effect temperature compensation.Solved and needed the long low problem of time, measuring accuracy when background technology adopts absolute radiometer to measure.Heat balance time of the present invention is short, and Measuring Time is shortened, and maintains same temperature fuctuation within a narrow range up and down in the temperature of observation stage and electric calibration stage receiving device always, and receiving device and parametric device reach balance fast, the raising measuring accuracy.Therefore the invention provides a kind of light irradiance measuring method that the electric calibration absolute radiometer is carried out temperature compensation.The present invention can be applicable to light irradiance and measures.
Embodiment:
Embodiment: the present invention can utilize absolute radiometer to realize measuring, and can adopt various types of electric calibration absolute radiometers.
The present invention adopts the electric calibration absolute radiometer to measure, and its structure comprises: receiving device, temperature sensor, heat sink, parametric device, first electrical heating wire, second electrical heating wire, shutter, key light door screen.
The electric calibration absolute radiometer that the present invention adopts the Changchun ray machine to be developed; The receiving device of absolute radiometer can adopt plane or chamber type hot receiver; The temperature sensor of absolute radiometer can adopt various types of thermoelectric piles or thermistor temperature sensor, when selecting thermistor temperature sensor for use, can form electric bridge by thermistor temperature sensor; The heat sink good metal materials of thermal conduction effect such as copper that adopt; First electrical heating wire, second electrical heating wire can adopt constantan wire or the bigger tinsel of other resistivity; Shutter can adopt the shutter of ordinary construction; The key light door screen can adopt the circle hole shape diaphragm.
The receiving device of absolute radiometer and parametric device all heat in whole measuring process, adding identical electric power is 80mW, the temperature of receiving device and parametric device is kept constant all the time, maintain the temperature higher 1 ℃ than heat sink temperature, heat sink temperature is 30 ℃, and the temperature of receiving device and parametric device is 31 ℃.
Measuring process is as follows: close shutter, add higher electrical power P e respectively on second electrical heating wire of first electrical heating wire of receiving device and parametric device
1=80mW (electric calibration stage), when making receiving device, parametric device and heat sink temperature reach balance, the output numerical value 8mV of the temperature sensor circuit of recorder device and parametric device; Then, open shutter, as light incident absolute radiometer (observation stage), regulating the electric power that reduces by first electrical heating wire makes receiving device, parametric device and heat sink temperature reach balance, even the temperature sensor circuit in observation stage output numerical value equates with the temperature sensor circuit output numerical value 8mV in electric calibration stage, at this moment, first electric power that electrical heating wire adds of receiving device is by Pe
1=80mW reduces to Pe
2=12mW, the luminous power of establishing the receiving device reception of observation stage is Po, therefore observing the general power of the interior receiving device reception of time of the sun is Po+Pe
2, try to achieve the optical radiation power Po=Pe of incident
1-Pe
2=68mW, luminous power Po just can obtain the light irradiance E=Po/A=1360W/m of incident divided by key light door screen area A=0.500cm2
2
Add identical electric power and can be chosen in any value between the 10mW-90mW, if when measured light signal is more weak, the electric power of adding just can be selected low-grade; If measured light signal is stronger, such as measuring the solar time, the electric power of adding will be selected higher gears, add electrical power P e
1Principle be: to first electrical heating wire, when second electrical heating wire heats, guarantee that the output signal of electric calibration absolute radiometer is not overflowed.
Claims (1)
1, the electric calibration absolute radiometer is carried out the light irradiance measuring method of temperature compensation, it is characterized in that the process of measuring light irradiance is as follows:
A. close shutter, on second electrical heating wire of first electrical heating wire of receiving device and parametric device, add electrical power P e respectively
1, be called the electric calibration stage, make the temperature of receiving device and parametric device identical all the time and keep constantly, the above-mentioned institute of record added electrical power P e when receiving device, parametric device and heat sink temperature reached balance
1, the output numerical value of the temperature sensor circuit of while recorder device and parametric device;
B. open shutter, as the timing of light incident absolute radiation, be called the observation stage, at this moment, second electric power that electrical heating wire adds is kept constant, regulates the electrical power P e that reduces step a first electrical heating wire
1Make receiving device, parametric device and heat sink temperature reach balance, even the temperature sensor circuit in electric calibration stage is exported numerical value and is equated that at this moment, first electric power that electrical heating wire adds of receiving device is by Pe among the temperature sensor circuit output numerical value in observation stage and the step a
1Reduce to Pe
2
The luminous power of c. establishing the receiving device reception of observation stage is Po, the general power Pe that receiving device receives in observation time
1Be Po+Pe
2, promptly try to achieve the luminous power Po=Pe of incident
1-Pe
2, luminous power Po obtains the light irradiance E of incident: E=Po/A divided by key light door screen area A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100166671A CN100427903C (en) | 2005-03-30 | 2005-03-30 | Light irradiance measuring method for implementing temperature compensation on electric calibration absolute radiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100166671A CN100427903C (en) | 2005-03-30 | 2005-03-30 | Light irradiance measuring method for implementing temperature compensation on electric calibration absolute radiometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1841028A CN1841028A (en) | 2006-10-04 |
| CN100427903C true CN100427903C (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100166671A Expired - Fee Related CN100427903C (en) | 2005-03-30 | 2005-03-30 | Light irradiance measuring method for implementing temperature compensation on electric calibration absolute radiometer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198035B (en) * | 2014-09-17 | 2016-02-10 | 中国电子科技集团公司第四十一研究所 | There is the solar irradiance sensor of temperature compensation |
| CN108088571B (en) * | 2017-11-22 | 2020-07-03 | 中国科学院长春光学精密机械与物理研究所 | Measuring method of solar absolute radiometer based on energy correction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09280964A (en) * | 1996-04-12 | 1997-10-31 | Nec Corp | Radiometer with selection function of observation area |
| CN1532530A (en) * | 2003-03-26 | 2004-09-29 | 中国科学院长春光学精密机械与物理研 | Method for quick detecting light powder using absolute radiation meter |
| US20050029459A1 (en) * | 2003-08-06 | 2005-02-10 | Testo Ag | Radiometer, sighting device for a radiometer and method therefor |
| CN2685852Y (en) * | 2003-03-26 | 2005-03-16 | 中国科学院长春光学精密机械与物理研究所 | Double-conic cavity compensating absolute radiometer |
-
2005
- 2005-03-30 CN CNB2005100166671A patent/CN100427903C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09280964A (en) * | 1996-04-12 | 1997-10-31 | Nec Corp | Radiometer with selection function of observation area |
| CN1532530A (en) * | 2003-03-26 | 2004-09-29 | 中国科学院长春光学精密机械与物理研 | Method for quick detecting light powder using absolute radiation meter |
| CN2685852Y (en) * | 2003-03-26 | 2005-03-16 | 中国科学院长春光学精密机械与物理研究所 | Double-conic cavity compensating absolute radiometer |
| US20050029459A1 (en) * | 2003-08-06 | 2005-02-10 | Testo Ag | Radiometer, sighting device for a radiometer and method therefor |
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| CN1841028A (en) | 2006-10-04 |
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