CN105333974A - Double-screen air suction type sapphire optical fiber high temperature sensor - Google Patents
Double-screen air suction type sapphire optical fiber high temperature sensor Download PDFInfo
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- CN105333974A CN105333974A CN201510900836.1A CN201510900836A CN105333974A CN 105333974 A CN105333974 A CN 105333974A CN 201510900836 A CN201510900836 A CN 201510900836A CN 105333974 A CN105333974 A CN 105333974A
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- air suction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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Abstract
The invention belongs to temperature sensors for high temperature measurement, and relates to a double-screen air suction type sapphire optical fiber high temperature sensor. The double-screen air suction type sapphire optical fiber high temperature sensor is suitable for measuring airflow temperature in the temperature zone of 1,300 K to 2,000 K. The high temperature sensor is composed of sapphire optical fibers with black cavities, a precious metal shielding cover, single-core multi-mode silica optical fibers, a photovoltaic conversion and data processing system and the like. In order to guarantee the accuracy of high temperature airflow temperature measurement, the precious metal shielding cover is designed to be of a double-screen air suction type structure to reduce heat transfer errors and speed errors. The advantages of being accurate in temperature measurement, fast in response, high in anti-electromagnetic interference capacity and the like are achieved, and the aim of high temperature measurement under the high-temperature high-speed airflow environment in the temperature zone of 1,300 K to 2,000 K can be achieved.
Description
Technical field
The invention belongs to the temperature sensor of high temperature measurement, relate to a kind of double screen air suction type sapphire fiber pyrostat, be applicable to 1300K ~ 2000K warm area and carry out gas flow temperature measurement.
Background technology
At present, measure the sensor that high temperature gas flow temperature is used, the thermopair of general employing platinum rhodium series, the maximum temperature that can measure is 2000K, and at present in the field such as Aeronautics and Astronautics, nuclear industry, involved temperature survey environment also becomes increasingly complex, and some exist the air-flow high temperature measurement occasion of electromagnetic interference (EMI), thermopair due to traditional thermometric is easy to be interfered, and lacks temperature sensing means accurately and effectively.
Along with the development of radiant thermometric technology, domestic and international many research institutions have developed the radiation thermometer of band fibre-optical probe, but most of sensor temperature-measuring range is low, and response speed is slow, far can not meet the requirement of transient temperature measuring.Domestic correlative study work focuses mostly in static state high-temperature test, and the dynamic test research of measuring for gas flow temperature is still in blank.
Summary of the invention
The object of the invention is to propose the double screen air suction type sapphire fiber pyrostat that a kind of 1300K of being applicable to ~ 2000K warm area carries out gas flow temperature measurement.
The object of the invention is to be achieved through the following technical solutions.
A kind of double screen air suction type sapphire fiber pyrostat of the present invention, comprising: blackbody cavity, sapphire fiber, radome, point optical detection system, Transmission Fibers, opto-electronic conversion and data handling system, coupling mechanism I and coupling mechanism II.
Its annexation is:
Described blackbody cavity is socketed in the outside of sapphire fiber one end; The other end of sapphire fiber is connected with the input end of coupling mechanism I; Blackbody cavity and sapphire fiber are fixed on the inside of radome.The output terminal of coupling mechanism I is fixedly connected with the input end of point optical detection system; The output terminal of optical detection system is divided to be fixedly connected with the input end of coupling mechanism II; The output terminal of coupling mechanism II is fixedly connected with the input end of Transmission Fibers; The output terminal of Transmission Fibers is connected with the input end of opto-electronic conversion and data handling system.
The described blackbody cavity material selection zirconia content identical with sapphire fiber thermal expansivity higher than 50% nonmetal oxide; Blackbody cavity is cylindric, and its length-diameter ratio inserting warm field is not less than 10, to ensure that blackbody cavity has higher effective emissivity.
Described radome is double shield air suction type radome; The outside wall surface of radome is designed with air admission hole and venthole, the area ratio of air admission hole and venthole is 1 ~ 6.For free stream Mach number lower than 0.3 situation, the air admission hole of radome and the area ratio of venthole get 1; For free stream Mach number 0.3 ~ 0.6 situation, the air admission hole of radome and the area ratio of venthole get 2 ~ 4; For free stream Mach number higher than 0.6 situation, the air admission hole of radome and the area ratio of venthole get 5 ~ 6.
Described radome adopts noble metal platinum rhodium material.
Described Transmission Fibers adopts single core multimode silica fibre of diameter 1mm, and Transmission Fibers and coupling mechanism I joint outer surface fluid sealant, avoid light leak.The head of Transmission Fibers is in the low-temperature space being no more than 500K.
Described point of optical detection system adopts point optical mode of half-reflection and half-transmission, and silicon detector selected by the detector in point optical detection system, and wavelength is 850nm ~ 1050nm; Divide the joint outer surface fluid sealant of optical detection system and coupling mechanism I and coupling mechanism II.
The joint outer surface fluid sealant of described coupling mechanism II and Transmission Fibers.
The major function of described opto-electronic conversion and data handling system does opto-electronic conversion to input signal, then nurses one's health the signal after opto-electronic conversion, amplifies and calculation process, obtain measuring tempeature.
Beneficial effect
A kind of double screen air suction type sapphire fiber pyrostat that the present invention proposes, has the following advantages:
1. using with sapphire fiber thermal expansivity close to and the blackbody cavity made of the not too low nonmetal oxide based on zirconia of emissivity as the detector probe of pyrostat, use silica fibre transmission of signal, and combine with detector with a point optical mode for half-reflection and half-transmission, compact conformation, dependable performance.
2. outside blackbody cavity, be designed with the radome of double shield structure, and by theoretical analysis and numerical evaluation, ensure, when measuring high temperature gas flow temperature, there is less integrated temperature measurement error, make it to be applied to high temperature gas flow environment and keep enough hot strengths, have that heatproof is high, anti-oxidant, electromagnetism interference, accuracy advantages of higher, insurmountable high temperature measurement problem before this can be solved.
Accompanying drawing explanation
Fig. 1 is the composition structural drawing of double screen air suction type sapphire fiber pyrostat in the specific embodiment of the invention;
1-blackbody cavity, 2-sapphire fiber, 3-radome, 4-divide optical detection system, 5-Transmission Fibers, 6-opto-electronic conversion and data handling system, 7-coupling mechanism I, 8-coupling mechanism II.
Embodiment
Below with reference to accompanying drawing and embodiment, technical solution of the present invention is further described:
Double screen air suction type sapphire fiber pyrostat in the present embodiment, its structure as shown in Figure 1, comprising: blackbody cavity 1, sapphire fiber 2, radome 3, point optical detection system 4, Transmission Fibers 5, opto-electronic conversion and data handling system 6, coupling mechanism I 7 and coupling mechanism II 8.
Its annexation is:
Blackbody cavity 1 is socketed in the outside of sapphire fiber 2 one end; The other end of sapphire fiber 2 is connected with the input end of coupling mechanism I 7; Blackbody cavity 1 and sapphire fiber 2 are fixed on the inside of radome 3.The output terminal of coupling mechanism I 7 is fixedly connected with the input end of point optical detection system 4; The output terminal of optical detection system 4 is divided to be fixedly connected with the input end of coupling mechanism II 8; The output terminal of coupling mechanism II 8 is fixedly connected with the input end of Transmission Fibers 5; The output terminal of Transmission Fibers 5 is connected with the input end of opto-electronic conversion and data handling system 6.
The blackbody cavity 1 material selection zirconia content identical with sapphire fiber 2 thermal expansivity higher than 50% nonmetal oxide; Blackbody cavity 1 is cylindric, and its length-diameter ratio inserting warm field is not less than 10, to ensure that blackbody cavity 1 has higher effective emissivity.
Radome 3 is double shield air suction type radome; The outside wall surface of radome 3 is designed with air admission hole and venthole, the area ratio of air admission hole and venthole is 1 ~ 6.For free stream Mach number lower than 0.3 situation, the air admission hole of radome 3 and the area ratio of venthole get 1; For free stream Mach number 0.3 ~ 0.6 situation, the air admission hole of radome 3 and the area ratio of venthole get 2 ~ 4; For free stream Mach number higher than 0.6 situation, the air admission hole of radome 3 and the area ratio of venthole get 5 ~ 6.Radome 3 adopts noble metal platinum rhodium 30.
Divide optical detection system 4 to adopt point optical mode of half-reflection and half-transmission, silicon detector selected by the detector in point optical detection system 4, and wavelength is 850nm ~ 1050nm; Divide the joint outer surface fluid sealant of optical detection system 4 and coupling mechanism I 7 and coupling mechanism II 8.
Transmission Fibers 5 adopts single core multimode silica fibre of diameter 1mm, and Transmission Fibers 5 and coupling mechanism I 7 joint outer surface fluid sealant, avoid light leak.The head of Transmission Fibers 5 is in the low-temperature space being no more than 500K.
The joint outer surface fluid sealant of coupling mechanism II 8 and Transmission Fibers 5.
Opto-electronic conversion and data handling system 6 are based on single-chip microcomputer or DSP, and its major function does opto-electronic conversion to input signal, then nurse one's health the signal after opto-electronic conversion, amplify and calculation process, obtain measuring tempeature.
The above is preferred embodiment of the present invention, and the present invention should not be confined to the content disclosed in this case study on implementation and accompanying drawing.Every do not depart from spirit disclosed in this invention under the equivalence that completes or amendment, all fall into the scope of protection of the invention.
Claims (10)
1. a double screen air suction type sapphire fiber pyrostat, is characterized in that: it comprises: blackbody cavity (1), sapphire fiber (2), radome (3), point optical detection system (4), Transmission Fibers (5), opto-electronic conversion and data handling system (6), coupling mechanism I (7) and coupling mechanism II (8);
Its annexation is:
Described blackbody cavity (1) is socketed in the outside of sapphire fiber (2) one end; The other end of sapphire fiber (2) is connected with the input end of coupling mechanism I (7); Blackbody cavity (1) and sapphire fiber (2) are fixed on the inside of radome (3); The output terminal of coupling mechanism I (7) is fixedly connected with the input end of point optical detection system (4); The output terminal of optical detection system (4) is divided to be fixedly connected with the input end of coupling mechanism II (8); The output terminal of coupling mechanism II (8) is fixedly connected with the input end of Transmission Fibers (5); The output terminal of Transmission Fibers (5) is connected with the input end of opto-electronic conversion and data handling system (6).
2. a kind of double screen air suction type sapphire fiber pyrostat as claimed in claim 1, is characterized in that: described blackbody cavity (1) the material selection zirconia content identical with sapphire fiber (2) thermal expansivity higher than 50% nonmetal oxide; Blackbody cavity (1) is for cylindric, and its length-diameter ratio inserting warm field is not less than 10, to ensure that blackbody cavity (1) has higher effective emissivity.
3. a kind of double screen air suction type sapphire fiber pyrostat as claimed in claim 1 or 2, is characterized in that: described radome (3) is double shield air suction type radome; The outside wall surface of radome (3) is designed with air admission hole and venthole, and the area ratio of air admission hole and venthole is 1 ~ 6.
4. a kind of double screen air suction type sapphire fiber pyrostat as claimed in claim 3, is characterized in that: for free stream Mach number lower than 0.3 situation, the air admission hole of radome (3) and the area ratio of venthole get 1; For free stream Mach number 0.3 ~ 0.6 situation, the air admission hole of radome (3) and the area ratio of venthole get 2 ~ 4; For free stream Mach number higher than 0.6 situation, the air admission hole of radome (3) and the area ratio of venthole get 5 ~ 6.
5. a kind of double screen air suction type sapphire fiber pyrostat as claimed in claim 1 or 2, is characterized in that: described radome (3) adopts noble metal platinum rhodium material.
6. a kind of double screen air suction type sapphire fiber pyrostat as claimed in claim 1 or 2, it is characterized in that: described Transmission Fibers (5) adopts single core multimode silica fibre of diameter 1mm, Transmission Fibers (5) and coupling mechanism I (7) joint outer surface fluid sealant, avoid light leak.
7. a kind of double screen air suction type sapphire fiber pyrostat as claimed in claim 1 or 2, is characterized in that: the head of Transmission Fibers (5) is in the low-temperature space being no more than 500K.
8. a kind of double screen air suction type sapphire fiber pyrostat as claimed in claim 1 or 2, it is characterized in that: described point of optical detection system (4) adopts point optical mode of half-reflection and half-transmission, divide the detector in optical detection system (4) to select silicon detector, wavelength is 850nm ~ 1050nm.
9. a kind of double screen air suction type sapphire fiber pyrostat as claimed in claim 1 or 2, is characterized in that: the joint outer surface fluid sealant of described point of optical detection system (4) and coupling mechanism I (7) and coupling mechanism II (8); The joint outer surface fluid sealant of described coupling mechanism II (8) and Transmission Fibers (5).
10. a kind of double screen air suction type sapphire fiber pyrostat as claimed in claim 1 or 2, it is characterized in that: the major function of described opto-electronic conversion and data handling system (6) does opto-electronic conversion to input signal, then the signal after opto-electronic conversion nursed one's health, amplify and calculation process, obtain measuring tempeature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510900836.1A CN105333974A (en) | 2015-12-08 | 2015-12-08 | Double-screen air suction type sapphire optical fiber high temperature sensor |
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| CN201510900836.1A CN105333974A (en) | 2015-12-08 | 2015-12-08 | Double-screen air suction type sapphire optical fiber high temperature sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066215A (en) * | 2016-07-29 | 2016-11-02 | 武汉理工大学 | A kind of sapphire pyrostat |
| CN109489855A (en) * | 2018-11-20 | 2019-03-19 | 中国航天空气动力技术研究院 | A kind of sapphire temperature sensor and preparation method thereof and temperature measurement system |
| CN110530805A (en) * | 2019-08-14 | 2019-12-03 | 中国原子能科学研究院 | High-temperature molten salt spectrophotometry device |
| CN111707388A (en) * | 2020-06-29 | 2020-09-25 | 蓝信义 | Installation mechanism of graphene high-temperature sensor |
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| CN2225036Y (en) * | 1994-07-26 | 1996-04-17 | 武汉工业大学 | Radiative optical fiber guide high temperature meter with block body chamber |
| CN2465162Y (en) * | 2001-02-28 | 2001-12-12 | 武汉理工大学 | Optical fibre high-temp. measurer |
| CN103162840A (en) * | 2011-12-13 | 2013-06-19 | 中国航空工业集团公司北京长城计量测试技术研究所 | High-temperature sensor for metal tubular black body hollow cavity |
| CN103674321A (en) * | 2013-12-20 | 2014-03-26 | 陕西电器研究所 | Probe temperature-sensing blackbody cavity for sapphire optical fiber temperature sensor |
| CN103674322A (en) * | 2013-12-20 | 2014-03-26 | 陕西电器研究所 | Sapphire optical fiber temperature sensor using separate type probe |
| CN104048778A (en) * | 2014-06-23 | 2014-09-17 | 南京师范大学 | Black-body-cavity-type high-temperature sensor and manufacturing method thereof |
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| US5364186A (en) * | 1992-04-28 | 1994-11-15 | Luxtron Corporation | Apparatus and method for monitoring a temperature using a thermally fused composite ceramic blackbody temperature probe |
| CN2225036Y (en) * | 1994-07-26 | 1996-04-17 | 武汉工业大学 | Radiative optical fiber guide high temperature meter with block body chamber |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066215A (en) * | 2016-07-29 | 2016-11-02 | 武汉理工大学 | A kind of sapphire pyrostat |
| CN106066215B (en) * | 2016-07-29 | 2019-06-28 | 武汉理工大学 | A kind of sapphire pyrostat |
| CN109489855A (en) * | 2018-11-20 | 2019-03-19 | 中国航天空气动力技术研究院 | A kind of sapphire temperature sensor and preparation method thereof and temperature measurement system |
| CN110530805A (en) * | 2019-08-14 | 2019-12-03 | 中国原子能科学研究院 | High-temperature molten salt spectrophotometry device |
| CN111707388A (en) * | 2020-06-29 | 2020-09-25 | 蓝信义 | Installation mechanism of graphene high-temperature sensor |
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