Fibre-optical couple temperature sensor of asymptotic wave with high sensitivity and production of pyrometric cone type sensing fibre-optical coupler

A technology of temperature sensor and fiber optic coupler, applied in thermometers, thermometers with physical/chemical changes, instruments, etc., can solve the problems of anti-interference ability, unsatisfactory sensitivity, complex structure, etc., and achieve strong anti-interference ability and simple structure , the effect of high sensitivity

Inactive Publication Date: 2005-12-28
SHANGHAI UNIV
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Problems solved by technology

The existing optical fiber temperature sensor has a complex structure and is not ideal in terms of anti-interference ability and sensitivity

Method used

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  • Fibre-optical couple temperature sensor of asymptotic wave with high sensitivity and production of pyrometric cone type sensing fibre-optical coupler
  • Fibre-optical couple temperature sensor of asymptotic wave with high sensitivity and production of pyrometric cone type sensing fibre-optical coupler
  • Fibre-optical couple temperature sensor of asymptotic wave with high sensitivity and production of pyrometric cone type sensing fibre-optical coupler

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Embodiment Construction

[0015] A preferred embodiment of the present invention is described as follows in conjunction with accompanying drawing:

[0016] see figure 1 and figure 2 , the high-sensitivity fiber-coupled evanescent wave temperature sensor includes an optical fiber 1, detectors 3, 4 and a signal processing unit 5, adopts a fiber optic coupler 2 for fused cone sensing as a probe, detectors 3, 4 and a signal processing unit 5. It is characterized in that a fused-cone optical fiber coupler 2 is used as a probe, and the inlet and outlet ends of a coupling fiber 20 of the fused-cone optical fiber coupler 2 for fused-cone sensing are respectively connected to the light source 1 and a Detector 3, and the entrance end of another coupling optical fiber 25 fusion cone section is cut off and is not connected to the light source, and the exit end is connected to another detector 4 through optical fiber; The output ports of the two detectors 3, 4 are connected to the signal The two inlet ports of t...

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Abstract

A temperature transducer of fibre - optical evanescent wave in high sensitivity consists of light source, detector and signal processing unit as detector probe is prepared by pyrometric cone type of fibre - optical coupler with one coupling fibre - optical pyrometric cone section connected to light source and one detector, another section to the other detector for varying output spectral ratio of coupler to obtain data of temperature change through conversion. The pyrometric cone type of fibre - optical coupler is prepared by melting two optical fibres and then drawing molten material to be cone form.

Description

Technical field: [0001] The invention relates to an optical fiber temperature sensor and a method for manufacturing the probe, in particular to a high-sensitivity optical fiber coupling evanescent temperature sensor and a method for manufacturing the optical fiber coupler for fusion cone type sensing. Background technique: [0002] In recent years, sensors are developing in the direction of high sensitivity, high accuracy, strong adaptability, compactness and intelligence. In this regard, fiber optic sensors are favored by everyone. Optical fiber has excellent characteristics such as anti-electromagnetic interference and atomic radiation, thin diameter, light weight, good insulation, water resistance, and corrosion resistance. It is not only used for normal temperature measurement, but more importantly, it can be used in some special or harsh environments. Temperature measurement, such as high voltage, strong electromagnetic, nuclear radiation, etc. Its sensing ability com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32
Inventor 王廷云包华育王克新
Owner SHANGHAI UNIV
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