CN101586990A - The simultaneously-measured plastic optical fiber sensing system of temperature and dissolved oxygen concentration - Google Patents
The simultaneously-measured plastic optical fiber sensing system of temperature and dissolved oxygen concentration Download PDFInfo
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- CN101586990A CN101586990A CNA2009100532727A CN200910053272A CN101586990A CN 101586990 A CN101586990 A CN 101586990A CN A2009100532727 A CNA2009100532727 A CN A2009100532727A CN 200910053272 A CN200910053272 A CN 200910053272A CN 101586990 A CN101586990 A CN 101586990A
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- optical fiber
- plastic optical
- dissolved oxygen
- temperature
- oxygen concentration
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Abstract
The present invention relates to the simultaneously-measured plastic optical fiber sensing system of a kind of temperature and dissolved oxygen concentration, comprise that light source is a mercury lamp; By the sensing head that plastic optical fiber is made, the head of sensing head is provided with the U-shaped optical fiber of peelling off sheath; Be coated with the sol-gel that contains the fluorescence indicator of temperature and dissolved oxygen DO sensitivity on the outer wall of U-shaped optical fiber; The light that mercury lamp sends is coupled into plastic optical fiber through low pass filters.The present invention has high sensitivity, is not subject to external environmental interference, simple in structure, cheap characteristics.
Description
Technical field
The present invention relates to a kind of sensor, particularly a kind of sensor-based system of can be simultaneously temperature and dissolved oxygen concentration being measured.
Background technology
Oxygen in water (Dissolved Oxygen; abbreviation DO) is meant the oxygen that exists with solubilised state in the water body; it is the oxygen supply source of the animals and plants that grow in the water and microorganism; to oxygen in water concentration to be determined at fields such as medical treatment, clinical medicine, industrial treatment, environmental monitoring all significant; especially in water quality monitoring and water treatment; dissolved oxygen DO is an important controlling index, also is most important investigation parameter in water environment protection, culture fishery and the Marine Sciences simultaneously.Present dissolved oxygen sensor mainly contains the dissolved oxygen sensor based on iodimetric titration, electrochemical process and optical fiber method.And these sensors can only be tested the content of dissolved oxygen DO, can not probe temperature, very big restriction is being arranged aspect culture fishery, the commercial production.
The present invention relates to the simultaneously-measured plastic optical fiber sensing system of a kind of temperature and dissolved oxygen concentration.Overcome above-mentioned technological deficiency, had high sensitivity, be not subject to external environmental interference, simple in structure, cheap characteristics.
Summary of the invention
The present invention will solve that existing dissolved oxygen sensor can only be measured dissolved oxygen concentration and the technical matters of energy measurement temperature not, and provide a kind of temperature and the simultaneously-measured plastic optical fiber sensing system of dissolved oxygen concentration, this system to have high sensitivity, be not subject to external environmental interference, simple in structure, cheap characteristics.
Technical scheme of the present invention is: the simultaneously-measured plastic optical fiber sensing system of a kind of temperature and dissolved oxygen concentration comprises that light source is a mercury lamp; By the sensing head that plastic optical fiber is made, the head of sensing head is provided with the U-shaped optical fiber of peelling off sheath; Be coated with the sol-gel that contains the fluorescence indicator of temperature and dissolved oxygen DO sensitivity on the outer wall of U-shaped optical fiber; The light that mercury lamp sends is coupled into plastic optical fiber through low pass filters.
The mercury lamp spectral line is 365nm or 35nm.Plastic optical fiber is a poly methyl methacrylate plastic optical fiber.Fluorescence indicator is that rare-earth luminescent material is sulphur oxygen red yttrium material or phenanthroline ruthenium.
Beneficial effect of the present invention is: this system has high sensitivity, is not subject to external environmental interference, simple in structure, cheap characteristics.
Description of drawings
Fig. 1 is the simultaneously-measured sensor construction synoptic diagram of temperature of the present invention and dissolved oxygen concentration.
Embodiment
As shown in Figure 1, the simultaneously-measured plastic optical fiber sensing system of temperature of the present invention and dissolved oxygen concentration, comprise that light source is a mercury lamp 1, low pass filter 2, sensing pool 3, the sensing head of making by plastic optical fiber 4, coupling mechanism 5, the bandpass filter 6 of 630nm, the bandpass filter 7 of 574nm, photodetector 8, photodetector 9.
The head of sensing head 4 has the U-shaped optical fiber of peelling off sheath; Be coated with the sol-gel that contains the fluorescence indicator of temperature and dissolved oxygen DO sensitivity on the outer wall of U-shaped optical fiber; The light that mercury lamp 1 sends is coupled into plastic optical fiber through low pass filters 2.Plastic optical fiber sensing head 4 is coated the fluorescence indicator sol-gel material that contains temperature and dissolved oxygen DO sensitivity by czochralski method.The spectral line of 365nm can the excitation temperature fluorescence indicator in mercury lamp 1 spectrum, make it send the fluorescence of 630nm, its fluorescence intensity can reduce with the increase of temperature, the spectral line of 435nm can excite the dissolved oxygen DO fluorescence indicator in mercury lamp 1 spectrum, make its fluorescence that sends 574nm, its fluorescence intensity can reduce with the increase of temperature.The fluorescence signal that produces enters into the first, two photodetector 8,9 through the bandpass filter 6 of 630nm and the bandpass filter 7 of 574nm respectively, measures temperature and dissolved oxygen concentration by surveying fluorescence intensity.
The preparation process of sol-gel sensitive material: pour into alcohol, methyl triethoxysilane, positive tetraethyl orthosilicate, the aqueous hydrochloric acid solution of certain volume ratio in the flask successively, then a certain amount of fluorescence indicator is added in the solution, the solution for preparing is stirred under 50 ℃ of water bath condition promptly obtained the transparent sol-gel solution that contains fluorescence indicator in 6 hours.
Claims (4)
1, the simultaneously-measured plastic optical fiber sensing system of a kind of temperature and dissolved oxygen concentration, comprise that light source is mercury lamp (1), sensing head (4) by plastic optical fiber is made is characterized in that: described sensing head (4) head is provided with on the outer wall of the U-shaped optical fiber U-shaped optical fiber of peelling off sheath and is coated with the sol-gel that contains the fluorescence indicator of temperature and dissolved oxygen DO sensitivity; The light that mercury lamp (1) sends is coupled into plastic optical fiber through low pass filters (2).
2, according to described temperature of claim 1 and the simultaneously-measured plastic optical fiber sensing system of dissolved oxygen concentration, it is characterized in that: described mercury lamp (1), its spectral line are 365nm or 35nm.
3, according to described temperature of claim 1 and the simultaneously-measured plastic optical fiber sensing system of dissolved oxygen concentration, it is characterized in that: described plastic optical fiber is a poly methyl methacrylate plastic optical fiber.
4, according to described temperature of claim 1 and the simultaneously-measured plastic optical fiber sensing system of dissolved oxygen concentration, it is characterized in that: described fluorescence indicator sol-gel is that rare-earth luminescent material is sulphur oxygen red yttrium material or phenanthroline ruthenium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100532727A CN101586990A (en) | 2009-06-18 | 2009-06-18 | The simultaneously-measured plastic optical fiber sensing system of temperature and dissolved oxygen concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100532727A CN101586990A (en) | 2009-06-18 | 2009-06-18 | The simultaneously-measured plastic optical fiber sensing system of temperature and dissolved oxygen concentration |
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| Publication Number | Publication Date |
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| CN101586990A true CN101586990A (en) | 2009-11-25 |
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| CNA2009100532727A Pending CN101586990A (en) | 2009-06-18 | 2009-06-18 | The simultaneously-measured plastic optical fiber sensing system of temperature and dissolved oxygen concentration |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257127A (en) * | 2013-05-13 | 2013-08-21 | 华南理工大学 | Method for improving dispersibility of fluorescent indicator molecules in organic silica gel and preparing oxygen sensitive fluorescent screen |
| CN103557961A (en) * | 2013-11-11 | 2014-02-05 | 天津理工大学 | LMSLPFG-based temperature and curvature simultaneous measurement method |
| CN103196475B (en) * | 2013-03-23 | 2017-04-19 | 中南林业科技大学 | Hybrid fiber bragg grating sensing system for simultaneously measuring temperature, humidity and gas concentration |
| CN108362395A (en) * | 2018-05-18 | 2018-08-03 | 深圳市博讯飞扬科技有限公司 | A kind of temperature sensing device and its test method based on photonic crystal fiber |
| CN108458997A (en) * | 2017-12-29 | 2018-08-28 | 北京农业智能装备技术研究中心 | A kind of dissolved oxygen fibre optical sensor |
| CN109490257A (en) * | 2018-12-28 | 2019-03-19 | 浙江五相智能科技有限公司 | Optical dissolved oxygen sensor and its manufacturing method with the compensation of automatic salinity |
| CN112147121A (en) * | 2020-10-26 | 2020-12-29 | 上海电力大学 | Dissolved oxygen monitoring system based on hydrogel optical fiber |
| CN112304912A (en) * | 2020-10-15 | 2021-02-02 | 上海电力大学 | Hydrogel optical fiber sensing system for monitoring blood sugar |
-
2009
- 2009-06-18 CN CNA2009100532727A patent/CN101586990A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196475B (en) * | 2013-03-23 | 2017-04-19 | 中南林业科技大学 | Hybrid fiber bragg grating sensing system for simultaneously measuring temperature, humidity and gas concentration |
| CN103257127A (en) * | 2013-05-13 | 2013-08-21 | 华南理工大学 | Method for improving dispersibility of fluorescent indicator molecules in organic silica gel and preparing oxygen sensitive fluorescent screen |
| CN103257127B (en) * | 2013-05-13 | 2015-07-29 | 华南理工大学 | It is a kind of that to improve fluorescent indicator molecule dispersed and prepare the method for oxygen sensitive fluorescent screen in organic silica gel |
| CN103557961A (en) * | 2013-11-11 | 2014-02-05 | 天津理工大学 | LMSLPFG-based temperature and curvature simultaneous measurement method |
| CN108458997A (en) * | 2017-12-29 | 2018-08-28 | 北京农业智能装备技术研究中心 | A kind of dissolved oxygen fibre optical sensor |
| CN108362395A (en) * | 2018-05-18 | 2018-08-03 | 深圳市博讯飞扬科技有限公司 | A kind of temperature sensing device and its test method based on photonic crystal fiber |
| CN108362395B (en) * | 2018-05-18 | 2024-01-19 | 动力博石(广东)智能装备有限公司 | Temperature sensing device based on photonic crystal fiber and testing method thereof |
| CN109490257A (en) * | 2018-12-28 | 2019-03-19 | 浙江五相智能科技有限公司 | Optical dissolved oxygen sensor and its manufacturing method with the compensation of automatic salinity |
| CN112304912A (en) * | 2020-10-15 | 2021-02-02 | 上海电力大学 | Hydrogel optical fiber sensing system for monitoring blood sugar |
| CN112147121A (en) * | 2020-10-26 | 2020-12-29 | 上海电力大学 | Dissolved oxygen monitoring system based on hydrogel optical fiber |
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Open date: 20091125 |