CN1120983C - Optical fibre high temp sensitive measuring method and device - Google Patents
Optical fibre high temp sensitive measuring method and device Download PDFInfo
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- CN1120983C CN1120983C CN 01106518 CN01106518A CN1120983C CN 1120983 C CN1120983 C CN 1120983C CN 01106518 CN01106518 CN 01106518 CN 01106518 A CN01106518 A CN 01106518A CN 1120983 C CN1120983 C CN 1120983C
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 27
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- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 239000000523 sample Substances 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
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- 230000001681 protective effect Effects 0.000 claims description 4
- 238000000691 measurement method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000005457 Black-body radiation Effects 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000009529 body temperature measurement Methods 0.000 abstract description 3
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
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- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
一种光纤传感高温测量方法及装置，该装置由黑体腔、光纤传感头、传输光纤、波分复用分路器、光电转换器和二次仪表组成。黑体腔感受被测高温物体的温度，发射辐射光波；光纤传感头接收黑体辐射腔发射的辐射光波，经传输光纤从测量现场传回；通过波分复用分路器将辐射光小组分解成两路波长不同光信号；光电转换器将两路光信号分别转换成电信号后，由二次仪表计算出温度。本发明有抗干扰能力强、抗腐蚀、传输距离远、工作稳定等特点，非常适用于各种高温炉体与环境的温度检测。
An optical fiber sensing high temperature measurement method and device, the device is composed of a blackbody cavity, an optical fiber sensing head, a transmission optical fiber, a wavelength division multiplexing splitter, a photoelectric converter and a secondary instrument. The black body cavity senses the temperature of the measured high-temperature object and emits radiation light waves; the optical fiber sensing head receives the radiation light waves emitted by the black body radiation cavity, and transmits them back from the measurement site through the transmission fiber; the radiation light group is decomposed into Two optical signals with different wavelengths; after the photoelectric converter converts the two optical signals into electrical signals, the temperature is calculated by the secondary instrument. The invention has the characteristics of strong anti-interference ability, anti-corrosion, long transmission distance, stable operation, etc., and is very suitable for temperature detection of various high-temperature furnace bodies and environments.
Description
The present invention relates to a kind of measuring technique, a kind of specifically optical fibre high temp sensitive measuring method and device.
In the industrial processes of industries such as metallurgy, chemical industry, building materials, the accurate measurement and the control of high-temperature temperature have crucial meaning.What extensively adopt in the current industrial production is the thermocouple temperature sensor of being made by noble metals such as platinum, rhodiums.Because thermocouple sensor antioxygenic property when high temperature is poor, the long-term use can produce than mistake.Particularly containing that some is special, when working under the aggressive atmosphere environment, phenomenons such as poisoning, burn into embrittlement can occur, sharply shorten serviceable life.So not only consume a large amount of precious metals, main is to influence ordinary production.In addition, in many high-temperature furnace bodies,,, can't be used for measuring temperature because the anti-electromagnetic interference capability of thermopair is poor as dielectric heating oven, microwave oven etc.As things go, the high temperature detection technique can't satisfy industrial needs fully, is badly in need of researching and developing out novel high-temperature measuring technique.What at present common infrared radiation type pyrometer adopted is the noncontact remote sensing technology, and there is following problem in it: 1, the temperature of being surveyed only is the temperature on tested high temp objects surface.2, testee is not an absolute black body, and the variation of its coefficient of blackness can cause measuring error.3, space spurious rays interferometry precision.4, measurement environment atmosphere (as water vapor etc.) also can cause measuring error to the inhomogeneous absorption of blackbody radiation light wave.So common infrared radiation formula pyrometer is difficult to reach high-acruracy survey.In order to overcome these problems, the U.S. at first develops the sapphire fiber pyrostat, plate blackbody chamber in resistant to elevated temperatures sapphire fiber termination, after blackbody chamber inserts high temperature source, sapphire fiber is directly gathered radiation light-wave from blackbody chamber, all adopts contact measurement method between high temperature source, blackbody chamber, sapphire fiber.Though it has overcome the deficiency of contactless measurement, yet be faced with new problem again: 1, sapphire fiber costs an arm and a leg.2, the sapphire fiber limited length of producing (domestic production only 0,3 meter).3, because above-mentioned 2 points during the measured signal teletransmission, will connect common silica fibre behind the sapphire fiber, but its interconnection technique are very complicated, connect difficulty.Therefore, the industrial applications of sapphire fiber pyrostat is restricted.
The objective of the invention is at above-mentioned present situation, provide a kind of, adopt " contact-noncontact " formula measuring method, be applicable to the Fibre Optical Sensor high temperature measurement system and the measuring method thereof of various high-temperature furnace bodies and environment according to the blackbody radiation principle.
The objective of the invention is to realize in the following manner: a kind of Fibre Optical Sensor measureing method of high-temperature, take " contact-noncontact " formula measuring method, concrete grammar is: experience the temperature of tested high temp objects, emitted radiation light wave with the direct way of contact; Receive institute's radiation emitted light wave with the noncontact mode, pass back from measure field through Transmission Fibers; Radiation light-wave is resolved into the different light signals of two-way wavelength, convert two ways of optical signals to electric signal respectively with the photoelectricity transformation approach again; Electric signal is scaled Temperature numerical.
A kind of Fibre Optical Sensor high temperature measurement device is made up of blackbody chamber, optical fiber sensor head, Transmission Fibers, wavelength-division multiplex shunt, photoelectric commutator and secondary instrument, blackbody chamber and fibre-optical probe are adjacent, fibre-optical probe is connected with the wavelength-division multiplex shunt by Transmission Fibers, the wavelength-division multiplex shunt is connected with two groups of photoelectric commutators, and photoelectric commutator is connected with secondary instrument by cable.
Described wavelength-division multiplex shunt prepares with multimode optical fiber.
Described blackbody chamber is contained in the metal ceramic tube, and this metal ceramic tube is connected with a protection sleeve, and optical fiber sensor head is contained in the protection sleeve, and the first end of Fibre Optical Sensor is adjacent with blackbody chamber, the other end then with stretch into sleeve in Transmission Fibers link to each other.
Principle of work of the present invention is to be experienced the temperature of testee, emitted radiation light wave by blackbody chamber; Optical fiber sensor head receives blackbody chamber radiation emitted light wave, is transmitted back to instrument through Transmission Fibers from measure field; By the wavelength-division multiplex shunt radiation light-wave is resolved into the different light signals of two-way wavelength; Photoelectric switching circuit calculates temperature by secondary instrument after converting two ways of optical signals to electric signal respectively.
Blackbody chamber of the present invention directly contacts with measured high temperature source, both can go deep into the inside of testee and measure, and has avoided coefficient of blackness to change caused measuring error again.Fibre-optical probe and blackbody chamber are contactless reception blackbody radiation signal, but radiation light-wave is short-distance transmission in airtight ceramic cavity, be not subjected to the influence of external environment, eliminated the interference of space spurious rays and ambiance to measuring accuracy, measuring accuracy is guaranteed, overcome the deficiency of non-contact measurement, made High-termperature Optical Fiber Sensor be able in commercial production, apply.
With multimembrane optical fiber preparation wavelength-division multiplex shunt, and be used for colourimetry Photoelectric Detection loop as wave filter.Two-color thermometry is to choose two groups of different light waves in the blackbody radiation light wave, determines temperature according to the ratio of these two groups of specific light intensities of wave.The light wave of different wave length enters different output optical fibres respectively in the incident light wave, the beam splitting and the filtering of light wave have only just been finished simultaneously with a device, reduce the filtering loss, improved signal to noise ratio (S/N ratio), when guaranteeing measuring accuracy, also reduced the cost of photodetector unit.
The present invention has characteristics such as antijamming capability is strong, anticorrosive, long transmission distance, working stability, is highly suitable for the temperature detection of various high-temperature furnace bodies and environment.
Below in conjunction with the description of drawings embodiments of the invention.
Fig. 1 measurement mechanism structural representation of the present invention
Fig. 2 blackbody chamber of the present invention and fibre-optical probe part-structure synoptic diagram
Fig. 3 photoelectric commutator circuit theory of the present invention synoptic diagram
With reference to accompanying drawing 1; 2; the present invention is by blackbody chamber 1; fibre-optical probe 2; Transmission Fibers 3; wavelength-division multiplex shunt 4; two groups of photoelectric commutators 5 and secondary instrument are formed; blackbody chamber 1 is contained in the metal ceramic tube 7; mounting flange 10 is housed on the metal ceramic tube; metal ceramic tube 7 is connected with a protective sleeve 8; fibre-optical probe 2 is contained in the protective sleeve 8; fibre-optical probe 2 front ends also are provided with lens 9; fibre-optical probe 2 one ends are adjacent with blackbody chamber 1; the other end is connected with Transmission Fibers 3; fibre-optical probe 2 is connected by Transmission Fibers 4 with wavelength-division multiplex shunt 4; wavelength-division multiplex shunt 4 multimembrane optical fiber preparation; wavelength-division multiplex shunt 4 is connected with two groups of photoelectric commutators 5, and photoelectric commutator 5 is connected with secondary instrument 6 by cable.
When measuring high temperature, blackbody chamber 1 is installed on the measured high temp objects by installation method 10, blackbody chamber 1 is experienced the temperature of testee, the emitted radiation light wave; Optical fiber sensor head 2 receives blackbody chambers 1 radiation emitted light wave, passes back from measure field through Transmission Fibers 3; By wavelength-division multiplex shunt 4 radiation light-wave is resolved into the different light signals of two-way wavelength; After two groups of photoelectric switching circuits 5 convert two ways of optical signals to electric signal respectively, calculate temperature by secondary instrument 6.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
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| CN 01106518 CN1120983C (en) | 2001-02-28 | 2001-02-28 | Optical fibre high temp sensitive measuring method and device |
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| CN 01106518 CN1120983C (en) | 2001-02-28 | 2001-02-28 | Optical fibre high temp sensitive measuring method and device |
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| CN1346972A CN1346972A (en) | 2002-05-01 |
| CN1120983C true CN1120983C (en) | 2003-09-10 |
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| CN 01106518 Expired - Fee Related CN1120983C (en) | 2001-02-28 | 2001-02-28 | Optical fibre high temp sensitive measuring method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100403009C (en) * | 2003-09-18 | 2008-07-16 | 阿特莱斯材料检测技术有限公司 | Non-contact measuring method and device for surface temperature of aging sample |
| CN109827664A (en) * | 2017-11-23 | 2019-05-31 | 北京振兴计量测试研究所 | temperature sensing device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438814B (en) * | 2013-08-29 | 2016-03-16 | 中国科学院工程热物理研究所 | A kind of tip clearance optical fibre measuring method and device |
| CN103674322B (en) * | 2013-12-20 | 2016-01-20 | 陕西电器研究所 | A kind of sapphire optical fiber temperature sensor adopting separate type probe |
| CN105784197B (en) * | 2016-05-23 | 2018-06-08 | 武汉理工大学 | A kind of a wide range of hyperthermic temperature sensor-based system and method |
| CN106124287B (en) * | 2016-06-13 | 2024-07-02 | 山东思睿环境设备科技有限公司 | High-temperature high-pressure digestion optical fiber colorimetric system |
| CN106781430B (en) * | 2016-11-15 | 2020-11-20 | 北京空间机电研究所 | A high-sensitivity infrared remote sensor performance testing device |
| CN109000820B (en) * | 2018-05-31 | 2020-08-14 | 北京遥测技术研究所 | Broadband colorimetric filtering sapphire optical fiber black body temperature sensor demodulation device |
| CN110216205A (en) * | 2019-07-05 | 2019-09-10 | 无锡德碳科技股份有限公司 | A kind of steel pipe intermediate frequency thermal expansion induction heating temperature automatic control system |
| CN116399470B (en) * | 2023-02-28 | 2023-09-26 | 国能锅炉压力容器检验有限公司 | Device and method for monitoring temperature of fire side of water-cooled wall of power station boiler |
-
2001
- 2001-02-28 CN CN 01106518 patent/CN1120983C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100403009C (en) * | 2003-09-18 | 2008-07-16 | 阿特莱斯材料检测技术有限公司 | Non-contact measuring method and device for surface temperature of aging sample |
| CN109827664A (en) * | 2017-11-23 | 2019-05-31 | 北京振兴计量测试研究所 | temperature sensing device |
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| CN1346972A (en) | 2002-05-01 |
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