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Temperature transducer for optical fiber grating steel tube packaging

A temperature sensor and optical fiber grating technology, applied in the field of sensing, can solve the problems that the temperature sensor is easily affected by external electromagnetic interference, easily affected by external stress, and the bare optical fiber grating is easy to break, and achieves simple structure, low cost, and small size Effect

Inactive Publication Date: 2005-03-16
DALIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a steel pipe package temperature sensor based on optical fiber grating technology, which solves the problem that the existing electrical temperature sensor is easily affected by external electromagnetic interference, the measurement accuracy is not high, and the bare optical fiber grating is easily broken and easily subjected to external stress. Disadvantages such as impact

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  • Temperature transducer for optical fiber grating steel tube packaging
  • Temperature transducer for optical fiber grating steel tube packaging

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Embodiment Construction

[0012] The best embodiment of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

[0013] The schematic diagram of the lateral section structure of the new fiber grating steel pipe package temperature sensor proposed by the present invention is attached. figure 1 As shown, the schematic diagram of the tangential section structure is shown in the attached figure 2 shown. The specific method of encapsulation is to firstly coat a layer of 703 glue 2 on the grid area of ​​the bare fiber grating 5, place the fiber grating 5 in a 1.5mm steel pipe 6 after curing, and adjust its position with a precision optical fiber adjustment frame so that it is in the Then pour epoxy resin glue 1 into the central part. After the epoxy resin glue 1 is cured, place the 1.5mm steel pipe 6 whose outer wall is evenly coated with 703 glue 2 on the central part of the outer 3mm steel pipe 3, and then pour epoxy resin into it. Glue...

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Abstract

This is a new fiber and grating steel tube sealed temperature sensor and belongs to the sensor technique field. This invention adopts double layer steel tube structure and fiber grating sealed with 703 glue and epoxide resin. The double steel structure effectively improves sensor heat-sensitive coefficients. The epoxide resin glue fixes light fiber and isolates the light fiber axial strains and the 703 glue covered light fiber area or 1.5mm steel tube wall can not only isolate the epoxide resin to avoid the multiple peak values but also reduces the outer strains interference. The new temperature sensor can widely used in the temperature measurement in the civil engineering, petrochemical industry and nuclear industry.

Description

technical field [0001] The invention belongs to the field of sensing technology, and relates to a steel pipe packaging temperature sensor based on fiber grating technology. Background technique [0002] At present, the more commonly used electrical temperature sensors are mainly thermocouple temperature sensors and thermistor temperature sensors. The thermocouple is mainly used to measure the temperature difference. In order to obtain the correct temperature value, a reference temperature must be used to correct the junction, and the output signal is relatively small. Therefore, if the measurement method is not paid attention to near room temperature, the measurement accuracy will be low. The thermistor temperature sensor has a fast response speed and a strong ability to change resistance with temperature, but has poor long-term stability. Moreover, traditional electrical temperature sensors are susceptible to electromagnetic radiation interference, have low precision, poor...

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Application Information

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IPC IPC(8): G01K11/3206
Inventor 李宏男任亮
Owner DALIAN UNIV OF TECH
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