CN101403637A - Thermal radiation power meter with temperature compensation - Google Patents
Thermal radiation power meter with temperature compensation Download PDFInfo
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- CN101403637A CN101403637A CNA2008101775632A CN200810177563A CN101403637A CN 101403637 A CN101403637 A CN 101403637A CN A2008101775632 A CNA2008101775632 A CN A2008101775632A CN 200810177563 A CN200810177563 A CN 200810177563A CN 101403637 A CN101403637 A CN 101403637A
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- heat sink
- sink body
- thermal radiation
- power meter
- radiation power
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- 230000005855 radiation Effects 0.000 title claims abstract description 46
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- 229910001006 Constantan Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000012774 insulation material Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000036760 body temperature Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a thermal radiation power meter provided with a temperature compensation capability. The thermal radiation power meter comprises a thermal radiation absorbing cavity, a heat sink body and a thermopile. The absorbing cavity appears as a taper shape and the internal part of the taper is painted into black and the outside of the absorbing cavity is covered by a column-shaped heat sink body and a port of the absorbing cavity is connected with the heat sink body through insulation materials; the heat sink body is made of copper; two measuring terminals of the thermopile are respectively in contact with the absorbing cavity and the heat sink body; and the whole thermal radiation power meter is covered by a metal casing and a diaphragm is arranged on a position where the casing rightly faces the taper-shaped absorbing cavity. A copper-constantan temperature-compensation thermocouple is embedded into the heat sink of the apparatus to measure the temperature of the heat sink body and an operational amplifier is respectively connected with the output end of the temperature compensation thermocouple and the output end of the thermopile and an adding device is respectively arranged at the rear ends of two operational amplifiers. The invention eliminates the output decrease caused by the self-temperature rising under the long-time measurement so as to enhance the measurement stability and accuracy of the thermal radiation power meter; and the apparatus is simple and can be used conveniently.
Description
Technical field
The present invention relates to the hot radiation measurement technical field, be specifically related to a kind of thermal radiation power meter with temperature compensation.
Background technology
The thermal radiation power meter theory structure, as shown in Figure 1.Mainly absorb cavity, heat sink body, temperature difference heat pile etc. by the circular cone type heat radiation and form, absorb the cavity inside blacking to increase the cavity absorptivity, heat sink body material is a copper product.Two measuring junctions of temperature difference heat pile contact with heat sink body with the absorption cavity respectively.
Conical cavity produces temperature rise after absorbed radiation heat, suppose that heat sink body temperature degree is constant, then absorb between cavity and the heat sink body to produce the temperature difference, and the electric potential difference that the output of temperature difference heat galvanic couple is corresponding with the temperature difference, this signal is proportional to measured heat radiation power.
q＝C·V
In the formula: q-measures hot-fluid;
The C-sensitivity constant;
The output of V-temperature difference heat galvanic couple thermoelectrical potential.
Above-mentioned situation is an ideal situation, is the working condition under the invariable situation of the heat sink body temperature degree of hypothesis kampometer.In real work, the temperature of heat sink body can not be invariable, generally can raise along with the increase of Measuring Time, and the value of the temperature difference can reduce along with the increase of Measuring Time like this, i.e. output can diminish.This just means, under the constant situation of tested heat radiation power, along with the increase of Measuring Time, the temperature of heat sink body can constantly rise, and causes the kampometer output signal to descend bad stability.Thermal radiation power meter output signal situation of change synoptic diagram as shown in Figure 2.
Above-mentioned defective at the thermal radiation power meter existence, can solve by heat sink body is carried out thermostatic control, the water-cooled thermal radiation power meter promptly is this scheme, but in some application scenario, the use of water-cooled thermal radiation power meter is not very suitable, because provide the constant temperature chilled water not very convenient to thermal radiation power meter.
Summary of the invention
In order to solve the problem that thermal radiation power meter exists temperature to waft in measuring process, correctly measure heat radiation power, the present invention proposes a kind of thermal radiation power meter with temperature compensation.
Realize the technical scheme of above-mentioned purpose: a kind of thermal radiation power meter with temperature compensation, this thermal radiation power meter comprise that heat radiation absorbs cavity, heat sink body, temperature difference heat pile; It is conical absorbing cavity, the inner blacking of its circular cone, and a columniform heat sink body is overlapped in the outside that absorbs cavity, and the port that absorbs cavity is connected with heat sink body by thermal insulation material; The material of heat sink body is a copper; Two measuring junctions of temperature difference heat pile contact with heat sink body with absorbing cavity respectively, and whole thermal radiation power meter gets up with a metal shell cover, face the conical position that absorbs cavity at shell, and a diaphragm is set.This device is installed the temperature of burying a heat sink body of copper constantan temperature compensation thermocouple measurement underground on heat sink body, output terminal at temperature compensation thermopair and temperature difference heat pile is connected an operational amplifier respectively, has established a totalizer in the rear end of two operational amplifiers.
The installation site of above-mentioned temperature compensation thermopair is located near heat sink body and thermoelectric pile position contacting.
Beneficial effect of the present invention: (1) is by measuring the heat sink body temperature degree of thermal radiation power meter, suitably regulate the enlargement factor of operational amplifier A 1 and A2, output signal is compensated, can eliminate thermal radiation power meter and measure the output that self temperature rise of causing causes and descend, thereby improve the measurement stability and the accuracy of thermal radiation power meter owing to long-time.(2) this method that temperature compensation thermopair is set is compared with the common method that heat sink body is carried out water-cooled and is had the advantages that equipment is simple, easy to use, the application scenario is wide.
Description of drawings
Fig. 1 tradition thermal radiation power meter principle assumption diagram.
Fig. 2 tradition thermal radiation power meter output synoptic diagram.
Fig. 3 a kind of thermal radiation power meter principle assumption diagram of the present invention with temperature compensation.
The forward and backward sensor output of Fig. 4 a kind of thermal radiation power meter temperature compensation of the present invention synoptic diagram with temperature compensation.
Among the figure: the 1-diaphragm; The heat sink body of 2-; 3-absorbs cavity; 4-temperature difference heat pile; 5-temperature compensation thermopair; 6-operational amplifier A 1; 7-operational amplifier A 2; The 8-totalizer.
Embodiment
Describe a kind of thermal radiation power meter of the present invention in detail below in conjunction with accompanying drawing with temperature compensation.
As shown in Figure 3, this thermal radiation power meter comprises that heat radiation absorbs cavity 3, heat sink body 2, temperature difference heat pile 4; It is conical absorbing cavity 3, the inner blacking of its circular cone, and a columniform heat sink body 2 is overlapped in the outside that absorbs cavity 3, and the bottom of its cone links to each other with heat sink body 2, and the material of heat sink body 2 is a copper; 4 two measuring junctions of temperature difference heat pile contact with heat sink body 2 with absorption cavity 3 respectively.Whole thermal radiation power meter gets up with a metal shell cover, faces the conical position that absorbs cavity 3 at shell, and a diaphragm 1 is set, and guarantees to have only tested radiation to enter conical absorption cavity 3 from diaphragm 1 like this, and other radiation interferometry not.On the rear portion of heat sink body 2, install and bury the temperature that a copper constantan temperature compensation thermopair 5 is measured heat sink body 2 underground, because this temperature compensation thermopair 5 is a single thermopair, can not be directly and thermoelectric pile 4 carry out the signal stack and compensate, so need thermoelectric pile 4 outputs and 5 outputs of temperature compensation thermopair are amplified with operational amplifier 7 and 6 respectively, and then by totalizer 8 stack compensation, wherein the enlargement factor of amplifier 7 is adjustable as 1, the enlargement factor of resonance-amplifier 6, and then by the test fine tuning, until temperature drift is offset, can directly measure and read heat radiation power this moment.
The installation site of compensation thermopair 5 is near heat sink body 2 and thermoelectric pile 4 position contacting, because the closer to inferior position, the compensating action that plays is good more.
As shown in Figure 4, the output that records with the thermal radiation power meter of this band temperature compensation has solved the problem that the output voltage signal that causes reduces because heat sink body temperature degree raises dry straightly.
Claims (2)
1. thermal radiation power meter with temperature compensation, this thermal radiation power meter comprise that heat radiation absorbs cavity (3), heat sink body (2), temperature difference heat pile (4); It is conical absorbing cavity (3), the inner blacking of its circular cone, and a columniform heat sink body (2) is overlapped in the outside that absorbs cavity (3), and the port that absorbs cavity (3) is connected with heat sink body (2) by thermal insulation material; The material of heat sink body (2) is a copper; (4) two measuring junctions of temperature difference heat pile contact with heat sink body (2) with absorbing cavity (3) respectively, and whole thermal radiation power meter gets up with a metal shell cover, face the conical position that absorbs cavity (3) at shell, and a diaphragm (1) is set; It is characterized in that, this device is gone up to install at heat sink body (2) and is buried the temperature that a copper constantan temperature compensation thermopair (5) is measured heat sink body (2) underground, output terminal at temperature compensation thermopair (5) and temperature difference heat pile (4) is connected an operational amplifier (6) and (7) respectively, has established a totalizer (8) in the rear end of two operational amplifiers (6) and (7).
2. a kind of thermal radiation power meter with temperature compensation according to claim 1 is characterized in that: the installation site of above-mentioned temperature compensation thermopair (5) is located near heat sink body (2) and thermoelectric pile (4) position contacting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101775632A CN101403637A (en) | 2008-11-21 | 2008-11-21 | Thermal radiation power meter with temperature compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101775632A CN101403637A (en) | 2008-11-21 | 2008-11-21 | Thermal radiation power meter with temperature compensation |
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| Publication Number | Publication Date |
|---|---|
| CN101403637A true CN101403637A (en) | 2009-04-08 |
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| CNA2008101775632A Pending CN101403637A (en) | 2008-11-21 | 2008-11-21 | Thermal radiation power meter with temperature compensation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118597A (en) * | 2019-04-26 | 2019-08-13 | 中国科学院长春光学精密机械与物理研究所 | A kind of actinometer Split hot sink structure |
| CN113686435A (en) * | 2021-08-27 | 2021-11-23 | 西安应用光学研究所 | A low temperature radiometer heater arrangement structure and arrangement method |
| WO2022002367A1 (en) * | 2020-06-30 | 2022-01-06 | MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. | Method for controlling a flux distribution of evaporated source material, detector for measuring electromagnetic radiation reflected on a source surface and system for thermal evaporation with electromagnetic radiation |
-
2008
- 2008-11-21 CN CNA2008101775632A patent/CN101403637A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118597A (en) * | 2019-04-26 | 2019-08-13 | 中国科学院长春光学精密机械与物理研究所 | A kind of actinometer Split hot sink structure |
| CN110118597B (en) * | 2019-04-26 | 2020-08-21 | 中国科学院长春光学精密机械与物理研究所 | A solar radiation meter split heat sink structure |
| WO2022002367A1 (en) * | 2020-06-30 | 2022-01-06 | MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. | Method for controlling a flux distribution of evaporated source material, detector for measuring electromagnetic radiation reflected on a source surface and system for thermal evaporation with electromagnetic radiation |
| CN115867688A (en) * | 2020-06-30 | 2023-03-28 | 马克思-普朗克科学促进协会 | Method for controlling magnetic flux distribution of evaporation source material, detector for measuring electromagnetic radiation reflected on source surface and system for thermal evaporation using electromagnetic radiation |
| CN113686435A (en) * | 2021-08-27 | 2021-11-23 | 西安应用光学研究所 | A low temperature radiometer heater arrangement structure and arrangement method |
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Open date: 20090408 |