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RADIATION MEASUREMENT DEVICE

Foreign code F180009333
File No. S2016-0394-C0
Posted date Mar 13, 2018
Country WIPO
International application number 2017JP004639
International publication number WO 2017138579
Date of international filing Feb 8, 2017
Date of international publication Aug 17, 2017
Priority data
  • P2016-022689 (Feb 9, 2016) JP
Title RADIATION MEASUREMENT DEVICE
Abstract [Problem] The purpose of the present invention is to provide a radiation measurement device for measuring the temperature of an object with high precision.
[Solution] In the present invention: radiation from an object is separated into polarized light by a polarized-light filter (3); one portion of the polarized light is introduced into a spectrum analyzer (7) via a first optical path, the other portion of the polarized light is introduced into the spectrum analyzer (7) via a second optical path, and the dichroic ratio of the radiation is measured; radiation from a black body (2), which has been placed within a vacuum-cryogenic-temperature vessel (1) in a state of quasi-thermal equilibrium at a vacuum cryogenic temperature, is introduced into the polarized-light filter (3) through a third optical path and separated into polarized light; the resulting polarized light is introduced into the same optical paths as those for the portions of polarized light from the object and then introduced into the spectrum analyzer (7), and the dichroic ratios are measured; and the temperature of the object is determined with high precision from these two dichroic ratios.
Outline of related art and contending technology BACKGROUND ART
Radiation in a non-contact measurement of the temperature as a method and device, for example, Non-Patent Document 1 and Patent Document 1-4 is known.
Patent Document 1 is, radiation from the emitter 2 is directed to a one polarization component, the spectral radiance L1 and L2 as well as measures, the off-line and the back light without being measured at each polarization component of the emissivity ε1t and ε2t are used to compensate for the effects of light by the back, the method of determining the temperature of the radiator is disclosed.
Patent Document 2 is, the infrared radiation from the radiation transmitted through the infrared filter, subsequently, by the second polarizer 1 are polarized, subsequently polarized light 2 by means of a electro-optical radiation the two orthogonal polarized components and at the same time the harmonic amplitude modulation, the harmonic amplitude ratio and the numerical analyzer calibration look-up table prepared in advance and the temperature can be obtained from the disclosure.
Patent Document 3 is, under an environment with a comb generator may be a cryo, the black body and the cooling of a black body at room temperature (liquid nitrogen and exposed to a black body) and are disposed so as to face each other, can be calibrated on the temperature of the microwave - diones. Under an environment of a black body about how cryo not mentioned.
Patent Document 4 is, the black body and the cooling of a black body at room temperature (the black body is dipped into liquid nitrogen) are separately prepared, can be calibrated on the temperature of the microwave - diones.
Non-Patent Document 1 is, the black body and the cooling of a black body at room temperature (the black body is dipped into liquid nitrogen) is prepared, and each of the radiation emitted from the chopper wheel of a very low temperature or at room temperature through the mixer pre-amplifier into the detector, radiation temperature measurement is disclosed.
However, the method of the above, the influence of disturbance of the measurement of radiation directly to the external environment while being indirectly since the method, the black body is always normal temperature region and temperature variations, liquid nitrogen cooling black body thermal radiation that the boiling point of 77K is because a disturbance of the vibration or heat, the temperature of the radiator can be measured with high accuracy is a problem that it is difficult.
Scope of claims (In Japanese)[請求項1]
内部を真空極低温に保つ真空極低温恒温槽と、
第一周波数の放射を増幅する第一光学路と、
前記真空極低温恒温槽の中に設けられる黒体と、
第二周波数の放射を増幅する第二光学路と、
前記真空極低温恒温槽の外に設けられる放射を偏光に分離する偏光フィルターと、
前記黒体からの放射が偏光フィルターに入れられる第三光学路と、
前記第一光学路及び前記第二光学路を経た信号を解析するスペクトラムアナライザーと、
から構成され、
前記真空極低温恒温槽の中の黒体が、10-4Pa以下の真空及び30K以下の極低温の準熱平衡状態に保たれ、
前記偏光フィルターが対象物の放射を受光するときは、対象物の放射が前記偏光フィルターにより偏光に分離され、分離された片方が前記第一光学路に入れられ、
それと同時にもう片方が前記第二光学路に入れられ、
且つ、
前記偏光フィルターが前記黒体の放射を前記第三光学路を経て受光するときは、
前記黒体の放射が前記偏光フィルターにより偏光に分離され、分離された片方が前記第一光学路に入れられ、
それと同時にもう片方が前記第二光学路に入れられ、
対象物の放射の前記第一周波数での第一放射輝度を前記偏光フィルター→前記第一光学路→前記スペクトラムアナライザーの手順で測定し、
対象物の放射の前記第二周波数での第二放射輝度を前記偏光フィルター→前記第二光学路→前記スペクトラムアナライザーの手順で測定し、
前記黒体の放射の前記第一周波数での第三放射輝度を前記偏光フィルター→前記第一光学路→前記スペクトラムアナライザーの手順で測定し、
前記黒体の放射の前記第二周波数での第四放射輝度を前記偏光フィルター→前記第二光学路→前記スペクトラムアナライザーの手順で測定し、
前記各手順で測定された前記第一放射輝度及び前記第二放射輝度の比を、前記第三放射輝度及び前記第四放射輝度の比を用いて較正することにより、
黒体を用いて測定される対象物の温度の測定値T2を求めると、
さらに、求めるべき対象物の温度(プランクの公式により定義される黒体の温度)T1と前記黒体を用いて測定される対象物の温度の測定値T2との温度誤差ΔT(=T1-T2)が、
対象物の絶対温度t1と使用する黒体の絶対温度t2との温度比率t1/t2に反比例して小さくなり、
使用する黒体の温度を低温にするほど前記温度誤差を低減する効果を大きくし、求めるべき対象物の温度を高精度で測定可能にすることを特徴とする放射測定器。
[請求項2]
前記第一光学路が、前記真空極低温恒温槽の中に設けられることを特徴とする請求項1に記載の放射測定器。
[請求項3]
前記第二光学路が、前記真空極低温恒温槽の外に設けられることを特徴とする請求項1に記載の放射測定器。
[請求項4]
前記偏光フィルターが対象物の放射を受光するときと、前記黒体の放射を前記第三光学路後に受光するときで、前記偏光フィルターが回転して偏光出力先に切替えができるように、前記偏光フィルター、前記第一光学路及び前記第二光学路が配置されていることを特徴とする請求項1に記載の放射測定器。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
  • Inventor
  • TAJIMA Osamu
  • NAGASAKI Taketo
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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