CN202329868U - Single optical channel semiconductor absorption-type optic fiber temperature sensor - Google Patents
Single optical channel semiconductor absorption-type optic fiber temperature sensor Download PDFInfo
- Publication number
- CN202329868U CN202329868U CN201120470074.3U CN201120470074U CN202329868U CN 202329868 U CN202329868 U CN 202329868U CN 201120470074 U CN201120470074 U CN 201120470074U CN 202329868 U CN202329868 U CN 202329868U
- Authority
- CN
- China
- Prior art keywords
- gallium arsenide
- temperature sensor
- coupling device
- lock pin
- semiconductor absorption
- 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
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses a single optical channel semiconductor absorption-type optic fiber temperature sensor, which comprises a gallium arsenide sensitive probe, an infrared LED (light-emitting diode), an input coupling device, an output coupling device, a photoelectric triode, an amplifying circuit and a display device, wherein an optical signal input end of the infrared LED is connected with an optical signal input end of the gallium arsenide sensitive probe through the input coupling device; and an optical signal output end of the gallium arsenide sensitive probe is connected with an input end of the display device after being sequentially connected with the output coupling device, the photoelectric triode and the amplifying circuit. A absorption peak value of the gallium arsenide sensitive probe for near-infrared light is changed along with temperature change, so that the transmissivity is changed along with temperature change. According to the single optical channel semiconductor absorption-type optic fiber temperature sensor, the characteristic of the gallium arsenide sensitive probe is utilized, the infrared light is used as a medium, and a temperature signal is converted into an electric signal, so that the aim of temperature detection is realized, the measuring accuracy is high, 0.01 DEG C can be reached, and favorable stability is realized.
Description
Technical field
The utility model relates to a kind of fibre optic temperature sensor, relates in particular to a kind of monochromatic light road semiconductor absorption-type fibre optic temperature sensor with high precision and high stability, belongs to the production field of fibre optic temperature sensor.
Background technology
Temperature sensor is used very extensive, is used to realize the monitoring temperature to product or environment.Present temperature sensor is of a great variety; Such as comprising thermal resistance temperature sensor, thermocouple temperature sensor, bimetallic temperature transducer, infrared temperature sensor etc.; These temperature sensors according to its different separately performance applications among different industries, with we life, work closely bound up.From the angle of technical advance, adopt optical fiber more and more to come into one's own as the temperature sensor of signal transport vehicle in recent years as path, employing light signal, this type temperature sensor is collectively referred to as fibre optic temperature sensor.
Existing fibre optic temperature sensor; Though adopted the path of optical fiber as the signal transmission, temperature sensing probe still adopts traditional temp probe, such as RTD, copper resistance probe etc.; Its measuring accuracy is difficult to improve; When in some comparison rugged environment, using, its stability is also not high enough, so be difficult to adapt to high precision, the high-stability requirement of modern industrial society.
Summary of the invention
The purpose of the utility model provides a kind of monochromatic light road semiconductor absorption-type fibre optic temperature sensor with high precision and high stability with regard to being in order to address the above problem.
The utility model is realized above-mentioned purpose through following technical scheme:
The utility model comprises gallium arsenide sensing probe, infrared LED, input coupling device, output coupling device, phototriode, amplifying circuit and display device; The light signal output end of said infrared LED is connected with the light signal input end of said gallium arsenide sensing probe through said input coupling device, and the light signal output end of said gallium arsenide sensing probe is connected with the input end of said display device after connecting said output coupling device, said phototriode and said amplifying circuit successively.
In the course of the work; At first send infrared light by infrared LED (being infrarede emitting diode); Infrared light is transferred to the gallium arsenide sensing probe after being coupled through the input coupling device; The temperature that can the gallium arsenide sensing probe be sensed through the infrared signal of gallium arsenide sensing probe and the temperature variation signal carries and be coupled to phototriode through output coupling device; Through amplifying circuit signal is amplified then, in display device, demonstrate the real-time temperature of being surveyed at last, reach the purpose of temperature detection through the signal conversion and after calculating.
Further, the utility model also comprises stabilized voltage supply, and the input end of said stabilized voltage supply is connected with AC power, and the output terminal of said stabilized voltage supply is connected with the power input of said infrared LED.Stabilized voltage supply can provide more reliable and more stable power supply for infrared LED, makes infrared LED obtain more stable output power, thereby can obtain more stable infrared light.
Particularly; Said gallium arsenide sensing probe comprises gallium arsenide wafer, sleeve pipe, lock pin and flange; Said sleeve pipe places in the said flange, and said lock pin places in the said sleeve pipe, and two sides of said gallium arsenide wafer are connected with output optical fibre with input optical fibre respectively; Said input optical fibre and said output optical fibre all place in the said lock pin, and said gallium arsenide wafer places the middle part of said lock pin and vertical each other with said lock pin.
Gallium arsenide is the compound of III-group chemical combination, is grey black look solid, and its fusing point is 1238 ℃.It is below 600 ℃, can existence stable in the air, and be not non-oxidizing acid attack.Gallium arsenide can be made semiconductor material, and its electron mobility is high, specific inductive capacity is little, can introduce deep-level impurity, electron effective mass is little, and band structure is special.The gallium arsenide sensing probe made from GaAs material changes with temperature variation the absorption crest value of near infrared light, thereby causes that transmissivity changes with temperature variation, so more enough signals that detects temperature and temperature variation exactly.
Sleeve pipe, lock pin can both be firmly fixing with the relative position of optical fiber and gallium arsenide wafer, be convenient to infrared light temperature signal stably is carried to output coupling device.
Further, two sides of said gallium arsenide wafer are connected with said lock pin bonding respectively, can avoid destruction that the connection of other connected mode such as screw brought so as far as possible or induced signal and transmission are impacted.
Further, said lock pin is a ceramic insertion core; Said sleeve pipe is a porcelain bushing.Stupalith can guarantee stability requirement, can not have any impact to induction of signal and signal transmission again, possesses the performance of secure bond simultaneously.
The beneficial effect of the utility model is:
The utility model utilizes the gallium arsenide sensing probe characteristic of temperature sensor signal exactly, is medium with the infrared light, and temperature signal is converted into electric signal; Thereby realize the purpose of detected temperatures, measuring accuracy is high, can reach 0.01 ℃; And having good stable property, the response time is fast, within 20 s; And good long term stability, repeated is arranged, and between 20 ~ 70 ℃, having favorable linearity, in industries such as petroleum industry, power industry, can be used widely.
Description of drawings
Fig. 1 is the one-piece construction block diagram of the utility model;
Fig. 2 is the structural representation of gallium arsenide sensing probe in the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
As shown in Figure 1; The utility model comprises stabilized voltage supply, gallium arsenide sensing probe, infrared LED, input coupling device, output coupling device, phototriode, amplifying circuit and display device; The input end of stabilized voltage supply is connected with AC power (being the power supply among Fig. 1); The output terminal of stabilized voltage supply is connected with the power input of infrared LED; The light signal output end of infrared LED is connected with the light signal input end of gallium arsenide sensing probe through the input coupling device, and the light signal output end of gallium arsenide sensing probe is connected with the input end of display device after connecting output coupling device, phototriode and amplifying circuit successively.
As shown in Figure 2; The gallium arsenide sensing probe comprises gallium arsenide wafer 4, porcelain bushing 2, ceramic insertion core 5 and flange 1, and sleeve pipe 2 places in the flange 1, and lock pin 5 places in the sleeve pipe 2; Two sides of gallium arsenide wafer 4 are connected with output optical fibre 6 with input optical fibre 3 respectively; Input optical fibre 3 all places in the lock pin 5 with output optical fibre 6, and gallium arsenide wafer 4 places the middle part of ceramic insertion core 5 and vertical each other with ceramic insertion core 5, and two sides of gallium arsenide wafer 4 bond with ceramic insertion core 5 respectively and are connected.
In conjunction with Fig. 1 and Fig. 2; In the course of the work; At first send infrared light by infrared LED; Infrared light is transferred to the gallium arsenide wafer 4 in the gallium arsenide sensing probe through input optical fibre 3 after through input coupling device coupling again, and the temperature that can gallium arsenide wafer 4 be sensed through the infrared signal of the gallium arsenide wafer 4 and temperature variation signal carries and be coupled to phototriode through output optical fibre 6 and output coupling device is amplified signal through amplifying circuit then; In display device, demonstrate the real-time temperature of being surveyed at last, reach the purpose of temperature detection through the signal conversion and after calculating.
The focusing on of the utility model provides a kind of infrared light that utilizes as transmission medium; Utilize the fibre optic temperature sensor of gallium arsenide as the temperature detection probe; The foregoing description has also been just listed out the most preferred embodiment among numerous embodiment; Anyly on above architecture basics, change the fibre optic temperature sensor that develops out, all should be regarded as invading the right of the utility model patent through conspicuous technology.
Claims (6)
1. monochromatic light road semiconductor absorption-type fibre optic temperature sensor; It is characterized in that: comprise gallium arsenide sensing probe, infrared LED, input coupling device, output coupling device, phototriode, amplifying circuit and display device; The light signal output end of said infrared LED is connected with the light signal input end of said gallium arsenide sensing probe through said input coupling device, and the light signal output end of said gallium arsenide sensing probe is connected with the input end of said display device after connecting said output coupling device, said phototriode and said amplifying circuit successively.
2. monochromatic light according to claim 1 road semiconductor absorption-type fibre optic temperature sensor; It is characterized in that: also comprise stabilized voltage supply; The input end of said stabilized voltage supply is connected with AC power, and the output terminal of said stabilized voltage supply is connected with the power input of said infrared LED.
3. monochromatic light according to claim 1 road semiconductor absorption-type fibre optic temperature sensor; It is characterized in that: said gallium arsenide sensing probe comprises gallium arsenide wafer, sleeve pipe, lock pin and flange; Said sleeve pipe places in the said flange; Said lock pin places in the said sleeve pipe; Two sides of said gallium arsenide wafer are connected with output optical fibre with input optical fibre respectively, and said input optical fibre and said output optical fibre all place in the said lock pin, and said gallium arsenide wafer places the middle part of said lock pin and vertical each other with said lock pin.
4. monochromatic light according to claim 3 road semiconductor absorption-type fibre optic temperature sensor is characterized in that: two sides of said gallium arsenide wafer are connected with said lock pin bonding respectively.
5. according to claim 3 or 4 described monochromatic light road semiconductor absorption-type fibre optic temperature sensors, it is characterized in that: said lock pin is a ceramic insertion core.
6. monochromatic light according to claim 3 road semiconductor absorption-type fibre optic temperature sensor is characterized in that: said sleeve pipe is a porcelain bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120470074.3U CN202329868U (en) | 2011-11-23 | 2011-11-23 | Single optical channel semiconductor absorption-type optic fiber temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120470074.3U CN202329868U (en) | 2011-11-23 | 2011-11-23 | Single optical channel semiconductor absorption-type optic fiber temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202329868U true CN202329868U (en) | 2012-07-11 |
Family
ID=46441846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120470074.3U Expired - Fee Related CN202329868U (en) | 2011-11-23 | 2011-11-23 | Single optical channel semiconductor absorption-type optic fiber temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202329868U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
-
2011
- 2011-11-23 CN CN201120470074.3U patent/CN202329868U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103278681B (en) | Microwave power sensor with multi-cantilever structure | |
| CN202329868U (en) | Single optical channel semiconductor absorption-type optic fiber temperature sensor | |
| CN101025854A (en) | Concrete internal temperature detecting device based on induction princinple | |
| CN103134607A (en) | Sing-optical-path semiconductor absorption-type optical fiber temperature sensor | |
| CN101556179A (en) | Self-heating heat responsive element and liquid level detector assembled thereby | |
| CN101694922A (en) | System for controlling stability of high-stability semiconductor laser light source | |
| CN102768081A (en) | Passive wireless temperature measuring system for capacitors of transformer substation | |
| CN103134609A (en) | High-sensitivity fiber bragg grating temperature sensor with adjustable sensitivity coefficient | |
| CN206330702U (en) | A kind of pressure detection circuit | |
| CN203337288U (en) | Temperature detection device for thin-plate type cut-tobacco drier | |
| CN103542957A (en) | Dual-optical-path semiconductor absorption-type optical fiber temperature sensor | |
| CN204719563U (en) | The control device of photodetector | |
| CN104406701A (en) | High-sensitivity infrared detection system based on phase shifting | |
| CN204027582U (en) | A kind of intelligent multichannel optical fiber distributed sensing system | |
| CN203241472U (en) | Multiple-cantilever beam microwave power sensor | |
| CN202329867U (en) | High-stability double-tube type optical fiber grating temperature sensor | |
| CN203191111U (en) | Temperature measurement device based on optical fibre sensing technology for electric contact | |
| CN107917770B (en) | Road subgrade pressure detection device with long-distance transmission and anti-interference functions | |
| CN201672988U (en) | Changing circuit of temperature transmitter | |
| CN201344703Y (en) | Automatic temperature compensation control circuit of refrigerator | |
| CN206945159U (en) | A kind of portable temperature measuring equipment | |
| CN206177328U (en) | Optic fibre microcavity sensor demodulating equipment | |
| CN2225036Y (en) | Radiative optical fiber guide high temperature meter with block body chamber | |
| CN104133501A (en) | Temperature control system for heating device | |
| CN204330044U (en) | For the infrared communication circuit of ultrasonic flow meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20121123 |