CN201945403U - Optical-fiber sensor for temperature and density - Google Patents
Optical-fiber sensor for temperature and density Download PDFInfo
- Publication number
- CN201945403U CN201945403U CN2010205355248U CN201020535524U CN201945403U CN 201945403 U CN201945403 U CN 201945403U CN 2010205355248 U CN2010205355248 U CN 2010205355248U CN 201020535524 U CN201020535524 U CN 201020535524U CN 201945403 U CN201945403 U CN 201945403U
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- temperature
- probe
- concentration
- density
- loop
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Abstract
An optical-fiber sensor for temperature and density comprises a temperature probe (16) and a density probe (15). The front ends of the probes are respectively provided with a right-angle prism (17) and a right-angle prism (18), a semiconductor slice (19) is installed between incident beam (22) of the temperature probe and the right-angle prism (18), and different transmissivities of semiconductors at different temperatures enable return light intensity to change. The density probe (15) is contacted with the external world, and light intensity of a reflecting return changes as density of solution around the right-angle prisms changes. Simultaneously a feedback light path (6) and a feedback light path (8) are added, thereby eliminating effect on the measurement of light source energy jitter. The return light and feedback light are connected to a circuit through photodiodes, and the sensor is real-time on line, has a capability of remote detection, is capable of measuring the temperature and density of the solution simultaneously, and has a low cost, a good stability, a big measuring range and a high sensitivity.
Description
Technical field
The utility model relates to a kind of light intensity modulation type Fibre Optical Sensor.To the modulation of loop light intensity, finally the variation of light signal is changed into the variation of voltage according to temperature and concentration parameter.This device probe size is little, cost is low, highly sensitive and realized the effect of " two a spy ".
Background technology
Optical fiber sensing technology is to be accompanied by the development of light transmitting fiber and Fibre Optical Communication Technology and a brand-new sensing technology forming, its sensing sensitivity is than high times of traditional sensors, can satisfy operate as normal in a lot of particular surroundingss such as high voltage, big noise, high temperature, severe corrosives, focus thermometric as the high-tension transformer Inside coil, the temperature rise test of ultra-high-tension power transmission line, the temperature concentration determination of the temperature concentration determination of store oil pot liquid, some flammable and combustible liquids and gas, two-phase flow three-phase stream concentration detection system etc.
Be used for thermometric Fibre Optical Sensor at present and mainly contain Raman scattering sensor and fiber-optic grating sensor; Measurement of concetration mainly is a back scattering formula sensor.Raman scattering sensor and fiber-optic grating sensor all need expensive spectrum (FBG) demodulator, and back scattering formula sensor needs superpower laser, so these sensors all cost an arm and a leg.And there is the contradiction on precision and the range in the sensor, has promptly improved measuring accuracy measurement range is diminished.
The utility model content
The utility model provides a kind of new structure sensor that integrates temperature test and concentration determination.Cost is low, the precision height, and broad quantum has been gathered the advantage of optical fiber simultaneously, is particularly useful for commercial production.The utility model comprises temperature probe source port (7), Temperature Feedback port (6), temperature loop port (10), concentration probe source port (9), concentration feedback port (8), concentration loop port (11), temp probe (1), concentration probe (2); It is characterized in that: temp probe (16) and concentration probe (15) place two chambeies of detector (3) respectively, and wherein temp probe chamber front end is airtight, and concentration probe chamber front end is uncovered; Probe front end prism is right angle prism (17,18); Between temp probe incident beam (22) and prism (18) the semiconductor thin slice is arranged; Light source temperature end (7) and concentration source ends (9) are drawn a backfeed loop (6), (8) separately, and temperature concentration loop and feedback are by the photodiode place in circuit.
Description of drawings
Fig. 1 is detector one-piece construction figure
1 is hygrosensor, places the airtight chamber of front end;
2 is the concentration detector, places the chamber of front opening;
3 is the integral body of detector;
4 steel pipes for the band coating, the inner optical fiber of protection passes light beam;
5 are optical fiber biography light beam;
6 is the Temperature Feedback port;
7 is the light source temperature port;
8 is the concentration feedback port;
9 is concentration light source port;
10 is temperature loop light mouth;
11 is concentration loop Guang Kou;
12 is one minute four web member;
13 is single silica fibre;
14 is the one-to-two web member
Fig. 2 is temperature and concentration probe schematic diagram
15 is the concentration detecting head;
16 is the temperature detecting head;
17 are concentration probe front end prism;
18 is temp probe front end prism;
19 is wafer;
20 are concentration device detection incident beam;
21 is concentration detector loop light beam;
22 is the hygrosensor incident beam;
23 is hygrosensor loop light beam.
Embodiment
Temp probe (16) and concentration probe (15) place two chambeies of detector (3) respectively, and wherein temp probe chamber front end is airtight, and concentration probe chamber front end is uncovered; Probe front end prism is a right angle prism (17), (18).Prism can be plastics, glass or quartz material.The temp probe prism can be at two right angle face plating high-reflecting films, and concentration probe prism is a right angle face plating high-reflecting film therein, strengthens the loop signal light intensity with this.
Light source can be led light source or laser instrument.Temperature probe source wavelength needs the absorbing wavelength coupling with semiconductor material, and photodiode also needs to mate with light source.The wafer of temp probe (16) front end can place between incident beam (22) and prism, or between loop light beam (23) and prism, also can adopt the plated film mode to be plated on incident beam front end or loop light beam front end or the prism bottom surface.
Photodiode in temperature loop (10), Temperature Feedback (6), concentration loop (11), concentration feedback (8) the difference place in circuit.Temperature loop (10) and Temperature Feedback (6), concentration loop (11) and concentration feedback (8) are formed comparator circuit respectively, eliminate the influence of the fluctuation of light source luminescent power to the loop light intensity with this.The variation of temperature or concentration makes the light intensity in temperature loop or concentration loop change, and through the conversion of photodiode and the amplification of circuit, finally shows as the variation of output voltage.
Claims (1)
1. a fiber optic temperature concentration sensor comprises temperature probe source port (7), Temperature Feedback port (6), temperature loop port (10), concentration probe source port (9), concentration feedback port (8), concentration loop port (11), temp probe (1), concentration probe (2); It is characterized in that: temp probe (16) and concentration probe (15) place two chambeies of detector (3) respectively, and wherein temp probe chamber front end is airtight, and concentration probe chamber front end is uncovered; Probe front end prism is right angle prism (17,18); Between temp probe incident beam (22) and prism (18) the semiconductor thin slice is arranged; Light source temperature end (7) and concentration source ends (9) are drawn a backfeed loop (6), (8) separately, and temperature concentration loop and feedback are by the photodiode place in circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205355248U CN201945403U (en) | 2010-09-17 | 2010-09-17 | Optical-fiber sensor for temperature and density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205355248U CN201945403U (en) | 2010-09-17 | 2010-09-17 | Optical-fiber sensor for temperature and density |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201945403U true CN201945403U (en) | 2011-08-24 |
Family
ID=44472742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205355248U Expired - Fee Related CN201945403U (en) | 2010-09-17 | 2010-09-17 | Optical-fiber sensor for temperature and density |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201945403U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444920A (en) * | 2014-09-02 | 2016-03-30 | 烟台龙源电力技术股份有限公司 | Online flue gas temperature measurement method, device and system based on visible light technology |
-
2010
- 2010-09-17 CN CN2010205355248U patent/CN201945403U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444920A (en) * | 2014-09-02 | 2016-03-30 | 烟台龙源电力技术股份有限公司 | Online flue gas temperature measurement method, device and system based on visible light technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: BEIJING GLASS INST. Effective date: 20130425 Owner name: BEIJING SCITLION TECHNOLOGY CO.,LTD. Free format text: FORMER OWNER: BEIJING GLASS RESEARCH INSTITUTE R+D CENTRE Effective date: 20130425 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130425 Address after: 101111 Beijing Tongzhou District light mechanical and electrical integration industrial base, four light street, No. 5 Patentee after: Beijing Scitlion Technology Co., Ltd. Address before: 101111 Beijing Tongzhou District light mechanical and electrical integration industrial base, four light street, No. 5 Patentee before: Beijing Glass Research Institute R&d Centre Patentee before: Beijing Glass Research Institute |
|
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG TIANBAOLI TECHNOLOGY DEVELOPMENT CO., LTD Free format text: FORMER OWNER: BEIJING SCITLION TECHNOLOGY CO.,LTD. Effective date: 20140904 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 101111 TONGZHOU, BEIJING TO: 325026 WENZHOU, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140904 Address after: 325026, No. 266 Ling Xi Road, rock town, Wenzhou Town, Longwan District, Zhejiang, China Patentee after: Zhejiang Tianbaoli Technology Development Co., Ltd. Address before: 101111 Beijing Tongzhou District light mechanical and electrical integration industrial base, four light street, No. 5 Patentee before: Beijing Scitlion Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20150917 |
|
| EXPY | Termination of patent right or utility model |