CN2583650Y - Optical fiber temperature sensor - Google Patents
Optical fiber temperature sensor Download PDFInfo
- Publication number
- CN2583650Y CN2583650Y CN 02249704 CN02249704U CN2583650Y CN 2583650 Y CN2583650 Y CN 2583650Y CN 02249704 CN02249704 CN 02249704 CN 02249704 U CN02249704 U CN 02249704U CN 2583650 Y CN2583650 Y CN 2583650Y
- Authority
- CN
- China
- Prior art keywords
- temperature sensor
- fiber coupler
- input end
- output terminal
- fibre optic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to an optical fiber temperature sensor on the basis of optical wavelength detection, which comprises a dc power supply, a light source, an optical fiber coupler, a semiconductor gallium arsenide temperature measuring probe, a grating light splitting system, a CCD photoelectric detector, an image collecting card and a signal processing and display system, wherein, the input end of the light source is connected with the dc power supply, and the output end of the light source is connected with the input end of the optical fiber coupler. The output end of the optical fiber coupler is connected with the semiconductor gallium arsenide temperature measuring probe, and the other output end of the optical fiber coupler is connected with the input end of the grating light splitting system. The output end of the grating light splitting system is connected with the input end of the CCD photoelectric detector, the output end of the CCD photoelectric detector is connected with the input end of the image collecting card, and the output end of the image collecting card is connected with the signal processing and display system. The utility model having the advantages of simple and reasonable structural design, high measuring precision, high anti-interference ability and favorable working stability can be used for different kinds of high-voltage, flammable, explosive and corrosive environments.
Description
Technical field
The utility model relate to a kind of by direct supply, can be directly and the fibre optic temperature sensor formed of light source, fiber coupler, semiconductor gallium arsenide temperature probe, grating splitting system, CCD photodetector, image pick-up card, signal Processing and the display system of optical fiber coupling based on the optical wavelength detection.
Background technology
Present existing fibre optic temperature sensor, be to belong to the intensity modulation type fibre optic temperature sensor that temperature probe is the transmission-type structure, for light intensity modulation type fibre optic temperature sensor can be worked steadily in the long term, must adopt the suitable compensation measure to change the adverse effect that measurement is caused to overcome various extraneous factors such as light source luminescent power, fibre loss and photodetector responsiveness.In order to solve the influence of extraneous factor to its measuring accuracy, the compensation of general employing dual wavelength is a kind of compensation method commonly used, its basic thought is with two different light sources of peak wavelength, the spectrum that light source sends is not in the absorption region of semiconductor temperature probe, the spectrum that another light source sends is in the absorption region of semiconductor temperature probe, the light that two light sources are sent is coupled into same optical fiber by a fiber coupler, be coupled into another fiber coupler again by the two-beam behind the semiconductor temperature probe then, with filter plate two-beam is separated again at last, enter two photodetectors respectively, relatively eliminate the influence of fibre loss and light source luminescent power by two signals like this to measuring, reach the purpose of compensation, the compensation method of this dual-wavelength optical-fiber temperature sensor is complex structure not only, and can not all compensate various main external disturbances, therefore can't satisfy the requirement of high-acruracy survey.
Summary of the invention
Therefore, the purpose of this utility model is intended to overcome the deficiencies in the prior art, and a kind of simple in structure, fibre optic temperature sensor that antijamming capability is strong, measuring accuracy is high detects based on optical wavelength is provided.
The purpose of this utility model is to realize like this.
A kind of fibre optic temperature sensor, comprise direct supply, can be directly and the light source of optical fiber coupling, fiber coupler, semiconductor gallium arsenide temperature probe, grating splitting system, the CCD photodetector, image pick-up card, signal Processing and display system, the input end of described light source is connected with direct supply, the output terminal of light source is connected with the input end of fiber coupler, fiber coupler has two output terminals, the one output terminal is connected with semiconductor gallium arsenide temperature probe, another output terminal is connected with the input end of grating splitting system, the output terminal of grating splitting system is connected with CCD photodetector input end, the output terminal of CCD photodetector is connected with the input end of image pick-up card, and the output terminal of image pick-up card is connected with signal Processing and display system.
Technique scheme also can be made to the following further improve.
Described direct supply is 1.5-6V.
Described light source is that peak luminous wavelength is the photodiode of the aluminum gallium arsenide material of 0.83 μ m, and this light emitting diode has little, the little power consumption of light source volume, and simultaneously the light that sends of light source is easy to and characteristics such as optical fiber coupling.
Described fiber coupler is that coupling ratio is that 50/50 the full fiber fuse of 1 * 2 tree type draws the awl coupling mechanism, this coupling mechanism has low added losses, the added losses of full fiber type fused tapered fiber coupler can be lower than 0.05dB at present, good directionality, its directivity index generally all surpasses 60dB, guarantee the directionality of transmission signals, and greatly reduced harassing between the circuit; Environmental stability is good, and the light channel structure of this coupling mechanism is simple, compact, through after the due care, is subjected to the influence of environmental baseline can be restricted to very little degree, and in-40 ℃～85 ℃ temperature range, such coupling mechanism all can guarantee stable operating characteristic.
Described semiconductor gallium arsenide temperature probe is a reflective structure, it comprises the stainless steel sleeve pipe, be located at the optical fiber pigtail in the stainless steel sleeve pipe, two ends are coated with the GaAs semiconductor material and the plane mirror of anti-reflection film, enter semiconductor gallium arsenide temperature probe from the light signal of fiber coupler output by optical fiber pigtail, be coated with the GaAs semiconductor material of anti-reflection film by two ends, penetrate on plane mirror, enter the GaAs semiconductor material once more by the plane reflection mirror reflection again, enter fiber coupler by optical fiber pigtail at last, enter grating splitting system from the output of the fiber coupler other end again and carry out beam split.The GaAs material selection transmittance of semiconductor gallium arsenide temperature probe is greater than 40% intrinsic semiconductor gallium arsenide, and the thickness of GaAs material is 120 μ m, and the both ends of the surface of gallium arsenide polishing and be coated with anti-reflection film, to reduce the light spreading loss.
Described grating splitting system comprises the input optical fibre that links to each other with an output terminal of fiber coupler, convex lens and the plane diffraction grating that plays the plano-convex form of collimation and focussing force, pass the convex lens collimation from the last light signal of exporting of fiber coupler by input optical fibre and carry out beam split for being incident on plane diffraction grating behind the directional light, enter convex lens by the plane diffraction grating reflection again through the light signal after the plane diffraction grating beam split, carry out spectral detection through the photosensitive sites of the CCD photodetector of convex lens focus on its focal plane at last.
Described CCD photodetector is the line array CCD photodetector.
The utility model structural design advantages of simple, strong and the good operating stability of measuring accuracy height, antijamming capability, can be used in the various environment such as high pressure, easily right explosive and corrosivity is strong temperature is monitored in real time, the fibre optic temperature sensor that detects based on optical wavelength.
Description of drawings
Accompanying drawing 2 is structural representations of semiconductor temperature probe;
Accompanying drawing 3 is structural representations of grating splitting system.
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment, in conjunction with Fig. 1 to Fig. 3, a kind of fibre optic temperature sensor comprises 3V direct supply 1.By peak luminous wavelength is the light source 2 that the photodiode of the aluminum gallium arsenide material of 0.83 μ m sends.Coupling ratio is 50/50 the full fiber fuse tapered fiber of 1 * 2 tree type coupling mechanism 3.Reflective semiconductor gallium arsenide temperature probe 4, it comprises stainless steel sleeve pipe 41, is located at the optical fiber pigtail 42 in the stainless steel sleeve pipe 41, GaAs semiconductor material 43 and the plane mirror 44 that two ends are coated with anti-reflection film.Grating splitting system 5, it comprises input optical fibre 51, plays the convex lens 52 and the plane diffraction grating 53 of the plano-convex form of collimation and focussing force.Line array CCD photodetector 6.Image collection card 7.Signal Processing and display system 8.
The input end of described light source 2 is connected with direct supply 1, the output terminal of light source 2 is connected with the input end of fiber coupler 3, enter semiconductor gallium arsenide temperature probe 4 from the light signal of fiber coupler 3 outputs by optical fiber pigtail 42, be coated with the GaAs semiconductor material 43 of anti-reflection film again by two ends, penetrate on plane mirror 44, enter GaAs semiconductor material 43 once more by plane mirror 44 reflections again, enter fiber coupler 3 by optical fiber pigtail 42 at last, enter grating splitting system 5 from the output of fiber coupler 3 other ends again and carry out beam split.
Light signal passes convex lens 52 collimation by input optical fibre 51 and carries out beam split on the plane diffraction grating 53 for being incident on behind the directional light, enter convex lens 52 by plane diffraction grating 53 reflections again through the light signal after plane diffraction grating 53 beam split, the photosensitive sites that focuses on the CCD photodetector 6 on its focal plane through convex lens 52 is carried out spectral detection at last.
The output terminal of CCD photodetector 6 is connected with the input end of image pick-up card 7, and the output terminal of image pick-up card 7 is connected with signal Processing and display system 8.By image pick-up card the spectral distribution image that does not add the light source before the temperature probe is gathered and to be deposited in the computing machine, calculate its spectral distribution curve; After adding temperature probe, gather one group of spectral distribution pictorial data by image pick-up card and enter computing machine at each temperature spot, calculate its spectral distribution curve, compare with the spectral distribution curve of each temperature spot with the original spectrum distribution curve of preserving in the computing machine that does not add temperature probe, just can draw transmittance curve, handle and to calculate the wavelength X of transmittance curve turning point this transmittance curve being carried out differential at this temperature spot semiconductor temperature probe
T, at last according to λ
TCalculate temperature T with the corresponding conversion of temperature T relation and show.
Claims (8)
1, a kind of fibre optic temperature sensor, comprise direct supply, can be directly and the light source of optical fiber coupling, fiber coupler, semiconductor gallium arsenide temperature probe, grating splitting system, the CCD photodetector, image pick-up card, signal Processing and display system, it is characterized in that: the input end of described light source is connected with direct supply, the output terminal of light source is connected with the input end of fiber coupler, fiber coupler has two output terminals, the one output terminal is connected with semiconductor gallium arsenide temperature probe, another output terminal is connected with the input end of grating splitting system, the output terminal of grating splitting system is connected with CCD photodetector input end, the output terminal of CCD photodetector is connected with the input end of image pick-up card, and the output terminal of image pick-up card is connected with signal Processing and display system.
2, fibre optic temperature sensor according to claim 1 is characterized in that: described direct supply is 1.5-6V.
3, fibre optic temperature sensor according to claim 1 is characterized in that: described light source is that peak luminous wavelength is the photodiode of the aluminum gallium arsenide material of 0.83 μ m.
4, fibre optic temperature sensor according to claim 1 is characterized in that: described fiber coupler is that coupling ratio is that 50/50 the full fiber fuse of 1 * 2 tree type draws the awl coupling mechanism.
5, fibre optic temperature sensor according to claim 1, it is characterized in that: described semiconductor gallium arsenide temperature probe is a reflective structure, it comprises the stainless steel sleeve pipe, and is located at the optical fiber pigtail that is connected with an output terminal of fiber coupler in the stainless steel sleeve pipe, GaAs semiconductor material and the plane mirror that two ends are coated with anti-reflection film.
6, fibre optic temperature sensor according to claim 1 is characterized in that: described grating splitting system comprises the input optical fibre that links to each other with fiber coupler one output terminal, convex lens and the plane diffraction grating that plays collimation and focussing force.
7, fibre optic temperature sensor according to claim 6 is characterized in that: described convex lens are the convex lens of plano-convex form.
8, fibre optic temperature sensor according to claim 1 is characterized in that: described CCD photodetector is the line array CCD photodetector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02249704 CN2583650Y (en) | 2002-11-20 | 2002-11-20 | Optical fiber temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02249704 CN2583650Y (en) | 2002-11-20 | 2002-11-20 | Optical fiber temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2583650Y true CN2583650Y (en) | 2003-10-29 |
Family
ID=33720080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02249704 Expired - Fee Related CN2583650Y (en) | 2002-11-20 | 2002-11-20 | Optical fiber temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2583650Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589727A (en) * | 2012-03-06 | 2012-07-18 | 唐山赛福特电子信息工程有限公司 | Real-time online detection system of liquid steel temperature based on CCD (Charge- Coupled Device) |
| CN102680096A (en) * | 2012-05-29 | 2012-09-19 | 南昌航空大学 | Low resolution optical fiber monochromator |
| CN103148957A (en) * | 2013-03-04 | 2013-06-12 | 杭州电子科技大学 | Twin-core photonic crystal fiber-based interferometric temperature sensing method and device |
| CN103630262A (en) * | 2012-08-20 | 2014-03-12 | 西安和其光电科技有限公司 | Multichannel gallium arsenide semiconductor absorption type optical fiber temperature measuring system |
| CN105509925A (en) * | 2015-11-30 | 2016-04-20 | 苏州佳像视讯科技有限公司 | CCD temperature detection device |
| CN106872376A (en) * | 2017-02-15 | 2017-06-20 | 深圳立仪科技有限公司 | Copolymerization Jiao's measurement apparatus and method of spectral balance |
| CN107024301A (en) * | 2017-03-27 | 2017-08-08 | 中山大学 | One kind condenses measurement of length devices and methods therefor based on condensation channel |
| CN107367335A (en) * | 2016-05-12 | 2017-11-21 | 深圳先进技术研究院 | Based on cadmium sulfide fibre optic temperature sensor Temperature Demodulation System |
-
2002
- 2002-11-20 CN CN 02249704 patent/CN2583650Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589727A (en) * | 2012-03-06 | 2012-07-18 | 唐山赛福特电子信息工程有限公司 | Real-time online detection system of liquid steel temperature based on CCD (Charge- Coupled Device) |
| CN102680096A (en) * | 2012-05-29 | 2012-09-19 | 南昌航空大学 | Low resolution optical fiber monochromator |
| CN102680096B (en) * | 2012-05-29 | 2015-05-20 | 南昌航空大学 | Low resolution optical fiber monochromator |
| CN103630262A (en) * | 2012-08-20 | 2014-03-12 | 西安和其光电科技有限公司 | Multichannel gallium arsenide semiconductor absorption type optical fiber temperature measuring system |
| CN103148957A (en) * | 2013-03-04 | 2013-06-12 | 杭州电子科技大学 | Twin-core photonic crystal fiber-based interferometric temperature sensing method and device |
| CN103148957B (en) * | 2013-03-04 | 2015-06-03 | 杭州电子科技大学 | Twin-core photonic crystal fiber-based interferometric temperature sensing method and device |
| CN105509925A (en) * | 2015-11-30 | 2016-04-20 | 苏州佳像视讯科技有限公司 | CCD temperature detection device |
| CN107367335A (en) * | 2016-05-12 | 2017-11-21 | 深圳先进技术研究院 | Based on cadmium sulfide fibre optic temperature sensor Temperature Demodulation System |
| CN106872376A (en) * | 2017-02-15 | 2017-06-20 | 深圳立仪科技有限公司 | Copolymerization Jiao's measurement apparatus and method of spectral balance |
| CN107024301A (en) * | 2017-03-27 | 2017-08-08 | 中山大学 | One kind condenses measurement of length devices and methods therefor based on condensation channel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204758260U (en) | Semiconductor laser structure of multitube core characteristic monitoring | |
| CN108398244B (en) | Optical fiber laser parameter real-time measuring device based on inclined fiber bragg grating | |
| CN110429453A (en) | A kind of superpower laser for taking back light detection system | |
| CN2583650Y (en) | Optical fiber temperature sensor | |
| CN1955640A (en) | Fibre-optical grating sensor and its wavelength demodulation method and sensor | |
| CN103338068A (en) | Light splitting monitoring device based on multi-channel parallel optical signals | |
| CN102003977A (en) | Multi-wavelength optical fiber sensor based on Fabry-Perot cavity | |
| CN109163662A (en) | Spectral Confocal displacement measurement method and device based on length scanning | |
| CN101476978A (en) | Method for measuring geometric parameter of single mode fiber | |
| CN102620761A (en) | Long-distance optical fiber Bragg grating sensing method and device based on self-heterodyne detection | |
| CN203929276U (en) | A kind of optical signal detecting disposal system based on resonance technique | |
| CN201004103Y (en) | Single fiber multi-direction photoelectric module | |
| CN201373781Y (en) | Semiconductor absorption optical fiber temperature detection device | |
| CN209928021U (en) | Dual-wavelength multi-polarization laser imaging device | |
| CN103644991A (en) | Dual-FBG (fiber bragg grating) stress sensor based on DFB (Distributed Feed Back) laser demodulation and stress measuring method | |
| CN1227520C (en) | Long-distance scatterer microvibrating signal measurement and fidelit pickup interferometer | |
| CN209280920U (en) | A kind of laser radar reception device and laser radar based on fiber coupling | |
| CN209147939U (en) | A kind of object deformation-quantity detection system based on laser measurement | |
| CN211528767U (en) | Optical assembly and system thereof | |
| CN204388875U (en) | Multi-channel fiber Bragg grating (FBG) demodulator | |
| CN210089853U (en) | Optical fiber on-line measurement optical power meter based on bypass waveguide structure | |
| CN103499890B (en) | Multikilowatt collimation-type isolator | |
| CN2581979Y (en) | Optical fibre gas sensor | |
| CN200944141Y (en) | Coherent multiplexing device of optical cavity loss sensor | |
| CN202002883U (en) | Minitype saturated absorption spectrum device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |