CN110954211B - Absolute radiometer thermal link capable of improving on-orbit measurement sampling rate - Google Patents
Absolute radiometer thermal link capable of improving on-orbit measurement sampling rate Download PDFInfo
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- CN110954211B CN110954211B CN201911131572.2A CN201911131572A CN110954211B CN 110954211 B CN110954211 B CN 110954211B CN 201911131572 A CN201911131572 A CN 201911131572A CN 110954211 B CN110954211 B CN 110954211B
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- 238000005070 sampling Methods 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 abstract description 20
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 description 9
- 230000004927 fusion Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract
The absolute radiometer thermal link capable of improving the on-orbit measurement sampling rate comprises a circular ring plate; the circular plate is provided with at least 3 hollow holes, the total area of all the hollow holes accounts for 25-30% of the area of the end face of the circular plate, the area between every two adjacent hollow holes is a high-speed heat exchange area, the width of the narrowest part of the high-speed heat exchange area is 15-19 mm, and the total area of all the high-speed heat exchange areas accounts for 11-12% of the area of the end face of the circular plate. Compared with the existing hot link, the invention reduces the total hot melting and simultaneously keeps the total average heat transfer rate not to be reduced basically, thereby improving the sampling rate of the absolute radiometer.
Description
Technical Field
The invention relates to the field of remote sensor on-track optical radiation measurement, in particular to an absolute radiometer hot link capable of improving on-track measurement sampling rate.
Background
The energy sources on earth are directly or indirectly from solar radiation besides terrestrial heat, nuclear energy and volcanic eruptions, and small changes of solar radiation can cause changes of energy cycle process on the global scale, and cause changes of the earth environment and climate. The long-term stable monitoring of solar irradiance has therefore an extremely important role for the whole human being and even for the natural world.
With the continuous deep research of solar irradiance science and the development of space spectrum remote sensing, people have higher and higher requirements on the validity of solar total irradiance measurement data, and the validity of the measurement data is positively correlated with the total measurement time and the sampling rate. Because the absolute radiometer carried on the satellite still rotates around the earth while monitoring the solar irradiance, the total time of each orbit of the absolute radiometer for measuring the sun is fixed and unchanged, and then, the improvement of the sampling rate becomes the key for improving the validity of the measurement data.
The sampling rate is related to the total heat flux and total thermal conductivity of the absolute radiometer heat transfer system, and thus, adjustments to the sampling rate can be made by making improvements to the thermal link (located between the heat sink and the radiation absorbing cavity) used to transfer heat in the absolute radiometer heat transfer system.
The hot link of the existing absolute radiometer is a circular plate that contacts the radiation absorbing cavity through a circular end face and an arc-shaped inner bore face. The heat transfer rate is higher because of the larger heat transfer contact area (the heat transfer rate is inversely related to the sampling rate), but the total heat fusion is larger because of the larger volume (the total heat fusion is positively related to the sampling rate), although the heat transfer rate can be improved by increasing the heat transfer contact area, the volume of the thermal link is also increased synchronously, and the sampling rate is difficult to improve.
Disclosure of Invention
The present invention is directed to overcoming the deficiencies of the prior art and providing an absolute radiometer hot link that improves on-track sampling rates, which improves the sampling rate of absolute radiometers by reducing total heat fusion while maintaining a substantially non-decreasing overall average heat transfer rate as compared to prior art hot links.
The technical scheme of the invention is as follows: the absolute radiometer thermal link capable of improving the on-orbit measurement sampling rate comprises a circular ring plate; the circular plate is provided with at least 3 hollow holes, the total area of all the hollow holes accounts for 25-30% of the area of the end face of the circular plate, the area between every two adjacent hollow holes is a high-speed heat exchange area, the width of the narrowest part of the high-speed heat exchange area is 15-19 mm, and the total area of all the high-speed heat exchange areas accounts for 11-12% of the area of the end face of the circular plate.
The further technical scheme of the invention is as follows: the hollow holes are fan-shaped.
The invention further adopts the technical scheme that: the hollow holes are uniformly distributed in an annular shape around the central hole of the circular plate.
The further technical scheme of the invention is as follows: the width of the narrowest part of the high-speed heat exchange area is 19mm, the total area of all the high-speed heat exchange areas accounts for 11% of the area of the end face of the circular plate, the number of the hollow holes is 4, and the total area of all the hollow holes accounts for 25% of the area of the end face of the circular plate.
The further technical scheme of the invention is as follows: the width of the narrowest part of the high-speed heat exchange area is 15mm, the total area of all the high-speed heat exchange areas accounts for 12% of the area of the end face of the circular plate, the number of the hollow holes is 8, and the total area of all the hollow holes accounts for 30% of the area of the end face of the circular plate.
The further technical scheme of the invention is as follows: the width of the narrowest part of the high-speed heat exchange area is 17mm, the total area of all the high-speed heat exchange areas accounts for 11.5% of the area of the end face of the circular plate, the number of the hollow holes is 6, and the total area of all the hollow holes accounts for 28% of the area of the end face of the circular plate.
Compared with the prior art, the invention has the following advantages:
compared with the existing hot link, the invention reduces the total hot melting and simultaneously keeps the total average heat transfer rate not to be reduced basically, thereby improving the sampling rate of the absolute radiometer.
The invention is further described below with reference to the figures and examples.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a schematic structural view of example 2 of the present invention;
fig. 4 is a schematic structural diagram of embodiment 3 of the present invention.
Detailed Description
Example 1:
as shown in fig. 1-2, the absolute radiometer thermal link capable of improving on-track measurement sampling rate includes a circular plate 1, a plurality of hollow holes 11 are disposed on the circular plate 1, and a region between adjacent hollow holes 11 is a high-speed heat exchange region 12.
Preferably, the hollow holes 11 are fan-shaped, and the hollow holes 11 are uniformly distributed in an annular shape around the central hole of the circular ring plate 1.
In this embodiment, the width of the narrowest part of the high-speed heat exchange area 12 is 19mm, the total area of all the high-speed heat exchange areas 12 accounts for 11% of the area of the end surface of the circular plate 1, the number of the hollow holes 11 is 4, and the total area of all the hollow holes 11 accounts for 25% of the area of the end surface of the circular plate 1.
Example 2:
as shown in fig. 3, the present embodiment is different from embodiment 1 only in that: in this embodiment, the width of the narrowest part of the high-speed heat exchange area 12 is 15mm, the total area of all the high-speed heat exchange areas 12 accounts for 12% of the area of the end surface of the circular plate 1, the number of the hollow holes 11 is 8, and the total area of all the hollow holes 11 accounts for 30% of the area of the end surface of the circular plate 1.
Example 3:
as shown in fig. 4, the present embodiment is different from embodiment 1 only in that: in this embodiment, the width of the narrowest part of the high-speed heat exchange area 12 is 17mm, the total area of all the high-speed heat exchange areas 12 accounts for 11.5% of the area of the end surface of the circular plate 1, the number of the hollow holes is 6, and the total area of all the hollow holes 11 accounts for 28% of the area of the end surface of the circular plate 1.
The technical effects of the invention are illustrated by comparative experimental data:
the existing hot link is used as a control group, the total hot melting and the total average heat transfer rate of the control group and the absolute radiometer sampling rate of the existing hot link are determined and set to be 1, and the comparison basis of the experimental group is used. The thermal links of examples 1 to 3 were prepared in the same physical dimensions as the experimental groups, and the heat transfer rates of the thermal links of the examples were measured under the same conditions and compared with the control group, and the results are shown in table 1.
Table 1:
| α | β | γ | |
| example 1 | 0.75 | 0.96 | 1.05 |
| Example 2 | 0.7 | 0.91 | 1.07 |
| Example 3 | 0.72 | 0.94 | 1.04 |
| Control group | 1 | 1 | 1 |
In table 1, α is the ratio of the total heat fusion of the experimental group of thermal links to the total heat fusion of the control group of thermal links, β is the ratio of the overall average heat transfer rate of the experimental group of thermal links to the overall average heat transfer rate of the control group of thermal links, and γ is the ratio of the sampling rate of the absolute radiometer using the experimental group of thermal links to the sampling rate of the absolute radiometer using the control group of thermal links.
As can be seen from table 1, the sampling rate of the absolute radiometer can be effectively improved for the thermal links in embodiments 1 to 3, compared to the existing thermal links.
Briefly describing the principles of the present invention:
the invention is arranged between the heat sink and the radiation absorption cavity of the absolute radiometer through the annular plate 1 and is used for transferring the heat of the radiation absorption cavity to the heat sink. The structures of the heat sink and the radiation absorption cavity of the absolute radiometer are the prior art and are not shown in the figure, and the connection relations of the annular plate, the heat sink and the radiation absorption cavity are the prior art and are not shown in the figure.
On the one hand, the hollow holes 11 arranged on the circular plate 1 reduce the total volume of the circular plate 1, so that the total hot melting of the circular plate 1 is reduced, and the sampling rate is improved.
On the other hand, although the heat transfer contact area is reduced by the arrangement of the hollow holes 11, the sampling rate can be reduced, a high-speed heat exchange area 12 is formed between the adjacent hollow holes 11, and the high-speed heat exchange area 12 is relatively large in temperature difference (because the temperature of the hollow holes 11 is relatively low when the circular plate 1 transfers heat, the temperature difference of the areas between the adjacent hollow holes 11 is relatively large), so that the heat transfer rate can be increased by more than 10% relative to other areas, and the reduction of the sampling rate caused by the reduction of the heat transfer contact area can be compensated.
In combination with the two aspects, the present invention maintains the overall average heat transfer rate substantially unchanged while reducing the overall thermal melting compared to prior art thermal links, thereby increasing the sampling rate of absolute radiometers.
Claims (4)
1. The absolute radiometer thermal link capable of improving the on-orbit measurement sampling rate comprises a circular ring plate; the method is characterized in that: the annular plate is provided with at least 3 hollowed holes, the hollowed holes are fan-shaped, the hollowed holes are uniformly distributed in an annular mode around a center hole of the annular plate, the total area of all the hollowed holes accounts for 25-30% of the area of the end face of the annular plate, the area between every two adjacent hollowed holes is a high-speed heat exchange area, the width of the narrowest part of the high-speed heat exchange area is 15-19 mm, and the total area of all the high-speed heat exchange areas accounts for 11-12% of the area of the end face of the annular plate.
2. The absolute radiometer hotlink for increasing the on-track sampling rate of claim 1, wherein: the width of the narrowest part of the high-speed heat exchange area is 19mm, the total area of all the high-speed heat exchange areas accounts for 11% of the area of the end face of the circular plate, the number of the hollow holes is 4, and the total area of all the hollow holes accounts for 25% of the area of the end face of the circular plate.
3. The absolute radiometer hotlink for increasing the on-track sampling rate of claim 1, wherein: the width of the narrowest part of the high-speed heat exchange area is 15mm, the total area of all the high-speed heat exchange areas accounts for 12% of the area of the end face of the circular plate, the number of the hollow holes is 8, and the total area of all the hollow holes accounts for 30% of the area of the end face of the circular plate.
4. The absolute radiometer hotlink for increasing the on-track sampling rate of claim 1, wherein: the width of the narrowest part of the high-speed heat exchange area is 17mm, the total area of all the high-speed heat exchange areas accounts for 11.5% of the area of the end face of the circular plate, the number of the hollow holes is 6, and the total area of all the hollow holes accounts for 28% of the area of the end face of the circular plate.
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| CN201911131572.2A CN110954211B (en) | 2019-11-19 | 2019-11-19 | Absolute radiometer thermal link capable of improving on-orbit measurement sampling rate |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202058642U (en) * | 2011-03-28 | 2011-11-30 | 佛山市天朋温控器有限公司 | Temperature controller with guide seat in hollow-out structure |
| CN106248203A (en) * | 2016-08-16 | 2016-12-21 | 中国科学院长春光学精密机械与物理研究所 | Absolute radiometer and the internal heat structure of radiometer for solar irradiance calibration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018009574A1 (en) * | 2016-07-05 | 2018-01-11 | Arable Labs, Inc. | Radiation measuring systems and methods thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202058642U (en) * | 2011-03-28 | 2011-11-30 | 佛山市天朋温控器有限公司 | Temperature controller with guide seat in hollow-out structure |
| CN106248203A (en) * | 2016-08-16 | 2016-12-21 | 中国科学院长春光学精密机械与物理研究所 | Absolute radiometer and the internal heat structure of radiometer for solar irradiance calibration |
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