CN104019903A - Black body cavity structure of black body radiation source - Google Patents
Black body cavity structure of black body radiation source Download PDFInfo
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- CN104019903A CN104019903A CN201410295034.8A CN201410295034A CN104019903A CN 104019903 A CN104019903 A CN 104019903A CN 201410295034 A CN201410295034 A CN 201410295034A CN 104019903 A CN104019903 A CN 104019903A
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Abstract
The invention relates to a black body cavity structure of a black body radiation source. The black body cavity structure comprises a black body cavity, a high-pressure pure-nitrogen source, a spiral pipe for precooling nitrogen, a low-temperature liquid medium, an isothermal block used for inserting a standard platinum resistance thermometer, and a nitrogen interlayer of the black body cavity, wherein the isothermal block used for inserting the standard platinum resistance thermometer is arranged in the black body cavity, the nitrogen interlayer of the black body cavity is arranged at the outer layer of the black body cavity, the nitrogen interlayer of the black body cavity is communicated with the black body cavity, the nitrogen interlayer of the black body cavity is connected with the high-pressure pure-nitrogen source through the spiral pipe for precooling nitrogen, and the black body cavity, the isothermal block, the nitrogen interlayer of the black body cavity, and the spiral pipe for precooling nitrogen are arranged in the low-temperature liquid medium of a constant-temperature tank. According to the novel black body radiation source, phenomena of frosting, dewing and mist at 10 DEG C below zero are completely eliminated, and thus the accuracy for verification or calibration is greatly improved. The black body cavity structure is a breakthrough in the technical field of black body cavities. The phenomena of frosting, dewing and mist of the cavity at a temperature of 10 DEG C below zero are completely prevented.
Description
Technical field
The present invention relates to a kind of standard and accurate calibrating or correcting device, particularly a kind of blackbody radiation source with Novel air cavity configuration.
Background technology
Along with the progress of infrared technique and detector technology, emerged in recent years a large amount of low-temp radiating thermometers, its minimum measurement temperature can reach-80～100 ℃, thus the corresponding blackbody radiation source that they are examined and determine or are calibrated also rolls up.When examining and determine below or calibrating for-10 ℃, blackbody cavity is inner can produce frosting, dewfall and fog phenomenon, this phenomenon can change to a great extent the slin emissivity of cavity inner wall and produce Absorption of Medium, cause the effective emissivity of cavity bottom obviously to reduce, become a main uncertainty source.
Summary of the invention
The present invention be directed to existing cavity in the problem of-10 ℃ of following frosting, dewfall and fog phenomenons that occur, a kind of blackbody cavity structure with the blackbody radiation source of new structure has been proposed, effectively solve this long-term unsolved technical matters, can avoid the generation of frosting, dewfall and fog phenomenon completely, greatly improve the accuracy of calibrating or calibration.
For achieving the above object, technical scheme of the present invention is: a kind of blackbody cavity structure of blackbody radiation source, comprise blackbody cavity, high pressure purity nitrogen source of the gas, the spiral type pipe of precooling nitrogen, cryogenic liquid medium, for inserting the isothermal piece of standard platinum resistance thermometer, the nitrogen interlayer of blackbody chamber, be characterized in: blackbody cavity is built-in with for inserting the isothermal piece of standard platinum resistance thermometer, blackbody cavity skin is provided with the nitrogen interlayer of blackbody chamber, the nitrogen interlayer of blackbody chamber is communicated with blackbody cavity, the nitrogen interlayer of blackbody chamber connects high pressure purity nitrogen source of the gas by the spiral type pipe of precooling nitrogen, and blackbody cavity and isothermal piece, the nitrogen interlayer of blackbody chamber, the spiral type pipe of precooling nitrogen is all placed in the cryogenic liquid medium of calibration cell.
Between the spiral type pipe of high pressure purity nitrogen source of the gas and precooling nitrogen, be connected with the needle-valve for regulation and control input nitrogen.The nitrogen interlayer outboard end of blackbody chamber is provided with and makes nitrogen from blackbody chamber bottom toward the diffusion of black matrix accent, with blocks air, enters the blackbody chamber nitrogen input port in blackbody cavity, is provided with blackbody chamber nitrogen delivery outlet below the inner, inner side.
Beneficial effect of the present invention is: the novel black matrix cavity structure of blackbody radiation source of the present invention, its effect is to eliminate completely at cavity inside below-10 ℃ by the formed frosting of water vapour, dewfall, fog phenomenon, thus the accuracy that has greatly improved cavity blackbody radiation.Apply unique cavity structure, blackbody radiation source is when-10 ℃ of following work, and pure nitrogen gas continuously input cavity is inner, to disperse the air with water vapor that is present in cavity inside, makes nitrogen take the whole spaces in chamber.Under the state of stable and balance, cavity inside is still under an atmospheric pressure.Because nitrogen input flow rate is sufficiently little and keep constant, thereby it can not affect the warm field distribution of cavity inside, thereby has guaranteed accuracy and the reliability of blackbody radiation source for examining and determine or calibrating.
This novel blackbody radiation source has been eliminated completely in frosting below-10 ℃, dewfall and fog phenomenon, has greatly improved the accuracy for examining and determine or calibrating.This is a kind of breakthrough in blackbody cavity technical field.Avoided the generation of cavity-10 ℃ of following frosting, dewfall and fog phenomenons that occur completely.
Accompanying drawing explanation
Fig. 1 is the blackbody cavity structural representation of blackbody radiation source of the present invention.
Embodiment
The invention will be further described for structure accompanying drawing and embodiment below.
As shown in Figure 1, a kind of blackbody cavity structure of blackbody radiation source be one with the calibration cell of novel blackbody cavity.It forms for pure nitrogen gas system by one.It comprises blackbody cavity 1, high pressure purity nitrogen source of the gas 8, and the spiral type pipe 6 of precooling nitrogen, cryogenic liquid medium 7, for inserting the isothermal piece 5 of standard platinum resistance thermometer, the nitrogen interlayer 2 of blackbody chamber, for the needle-valve 9 of regulation and control input nitrogen.
Blackbody cavity 1 is built-in with for inserting the isothermal piece 5 of standard platinum resistance thermometer, blackbody cavity 1 skin is provided with the nitrogen interlayer 2 of blackbody chamber, the nitrogen interlayer 2 of blackbody chamber is communicated with blackbody cavity 1, the spiral type pipe 6 of the nitrogen interlayer 2 of blackbody chamber by precooling nitrogen connects high pressure purity nitrogen sources of the gas 8, and blackbody cavity 1 and isothermal piece (5), the nitrogen interlayer 2 of blackbody chamber, the spiral type pipe 6 of precooling nitrogen be all placed in the cryogenic liquid medium 7 of calibration cell.Between high pressure purity nitrogen source of the gas 8 and the spiral type pipe 6 of precooling nitrogen, be connected with the needle-valve 9 for regulation and control input nitrogen.Nitrogen interlayer 2 outboard ends of blackbody chamber are provided with nitrogen are spread from blackbody chamber 1 bottom toward black matrix accent, with blocks air, enter the blackbody chamber nitrogen input port 3 in blackbody cavity 1, are provided with blackbody chamber nitrogen delivery outlet 4 below the inner, inner side.
Precooling spiral type pipe 6 is consistent the temperature of nitrogen of input cavity and the temperature of cryogenic liquid medium.For inserting the isothermal piece 5 of standard platinum resistance, the temperature displayed value of platinum resistance and the temperature of cavity bottom are consistent.The nitrogen interlayer 2 of blackbody chamber can improve the warm field uniformity of cavity inside, thereby improves the emissivity of blackbody cavity.Needle-valve 9 can carry out fine adjustments and guarantee the constant of input flow rate input nitrogen amount.
There is certain thickness blackbody cavity isothermal piece 5 and be immersed in cryogenic liquid medium 7, to guarantee to insert standard platinum resistance institute's temp. displaying function in isothermal piece 5 and the consistance of cavity bottom temperature.
Claims (3)
1. the blackbody cavity structure of a blackbody radiation source, comprise blackbody cavity (1), high pressure purity nitrogen source of the gas (8), the spiral type pipe of precooling nitrogen (6), cryogenic liquid medium (7), for inserting the isothermal piece (5) of standard platinum resistance thermometer, the nitrogen interlayer (2) of blackbody chamber, it is characterized in that: blackbody cavity (1) is built-in with for inserting the isothermal piece (5) of standard platinum resistance thermometer, blackbody cavity (1) skin is provided with the nitrogen interlayer (2) of blackbody chamber, the nitrogen interlayer (2) of blackbody chamber is communicated with blackbody cavity (1), the nitrogen interlayer (2) of blackbody chamber connects high pressure purity nitrogen source of the gas (8) by the spiral type pipe (6) of precooling nitrogen, and blackbody cavity (1) and isothermal piece (5), the nitrogen interlayer (2) of blackbody chamber, the spiral type pipe of precooling nitrogen (6) is all placed in the cryogenic liquid medium (7) of calibration cell.
2. the blackbody cavity structure of blackbody radiation source according to claim 1, is characterized in that: between the spiral type pipe (6) of high pressure purity nitrogen source of the gas (8) and precooling nitrogen, be connected with the needle-valve (9) for regulation and control input nitrogen.
3. the blackbody cavity structure of blackbody radiation source according to claim 1, it is characterized in that: nitrogen interlayer (2) outboard end of blackbody chamber is provided with and makes nitrogen from blackbody chamber (1) bottom toward the diffusion of black matrix accent, with blocks air, enter the blackbody chamber nitrogen input port (3) in blackbody cavity (1), be provided with blackbody chamber nitrogen delivery outlet (4) below the inner, inner side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410295034.8A CN104019903B (en) | 2014-06-27 | 2014-06-27 | The blackbody cavity structure of blackbody radiation source |
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| CN201410295034.8A CN104019903B (en) | 2014-06-27 | 2014-06-27 | The blackbody cavity structure of blackbody radiation source |
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| CN104019903A true CN104019903A (en) | 2014-09-03 |
| CN104019903B CN104019903B (en) | 2018-05-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865632A (en) * | 2016-03-28 | 2016-08-17 | 浙江省计量科学研究院 | Portable blackbody metering furnace based on semiconductor and mini-sized water cooling and heat radiation technology |
| CN110017906A (en) * | 2019-04-29 | 2019-07-16 | 济南长峰致远仪表科技有限公司 | Black body radiation source device based on salt bath thermostat |
| CN113108923A (en) * | 2021-04-15 | 2021-07-13 | 广东省计量科学研究院（华南国家计量测试中心） | Radiation blackbody cavity with micro-groove group structure and water-groove type blackbody radiation source |
| CN113483901A (en) * | 2021-07-16 | 2021-10-08 | 衢州学院 | Blackbody cavity structure based on high-temperature blackbody radiation source |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865632A (en) * | 2016-03-28 | 2016-08-17 | 浙江省计量科学研究院 | Portable blackbody metering furnace based on semiconductor and mini-sized water cooling and heat radiation technology |
| CN110017906A (en) * | 2019-04-29 | 2019-07-16 | 济南长峰致远仪表科技有限公司 | Black body radiation source device based on salt bath thermostat |
| CN113108923A (en) * | 2021-04-15 | 2021-07-13 | 广东省计量科学研究院（华南国家计量测试中心） | Radiation blackbody cavity with micro-groove group structure and water-groove type blackbody radiation source |
| CN113108923B (en) * | 2021-04-15 | 2022-03-01 | 广东省计量科学研究院（华南国家计量测试中心） | Radiation blackbody cavity with micro-groove group structure and water-groove type blackbody radiation source |
| CN113483901A (en) * | 2021-07-16 | 2021-10-08 | 衢州学院 | Blackbody cavity structure based on high-temperature blackbody radiation source |
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| CN104019903B (en) | 2018-05-08 |
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