Pipe displace ment sensor of optical fibre grating marmen

A technology of displacement sensor and memory alloy, which is applied in the field of sensing to achieve the effects of low cost, high measurement accuracy and simple structure

Inactive Publication Date: 2007-04-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First make the shape memory alloy elbow and pretreat the bare fiber grating

Method used

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  • Pipe displace ment sensor of optical fibre grating marmen
  • Pipe displace ment sensor of optical fibre grating marmen
  • Pipe displace ment sensor of optical fibre grating marmen

Examples

Experimental program
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Embodiment Construction

[0017] The best embodiment of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

[0018] The fiber grating displacement sensor proposed by the present invention is shown in Figure 1 in lateral cross-section, and the top view of the sensor is shown in Figure 2, and the packaged shape memory alloy tube involved in the cross-section is shown in Figure 3. The cross-sectional view of the slotted copper sheet involved is shown in FIG. 4 .

[0019] The specific method of welding the shape memory alloy tube and the copper sheet base is to firstly use the shape memory alloy tube 2 to extrude a semicircular groove on the thin copper sheet with a thickness of 0.2mm to make the copper sheet 3 with the groove; The memory alloy tube 2 is placed in the groove and easily fixed on the copper sheet base 1; one end of the grooved copper sheet 3 is heated with an electric soldering iron, and the solder is placed on the other...

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PUM

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Abstract

The invention relates to contacting type optical fiber raster shape memory alloy pipe displacement transducer. Its features are that it is made up of bearing, protecting steel tube, spring, and optical fiber raster strain gage with double layer steel tube composite structure; it uses epoxy resin to seal the optical fiber taster in to the 0.5mm steel tube which assembles with two 1.2mm steel tubes to form optical fiber raster strain gage of which one end is connected with 1.2mm hollow steel tube; another end is connected with the spring and set in the bearing. The advantages of the invention are that little volume and high measuring precision, setting many sensors at one optical fiber to do multipoint distributivity measuring, connecting with various sensors based on optical fiber raster technique in series.

Description

technical field [0001] The invention belongs to the field of sensing technology and relates to a displacement sensor based on fiber grating technology and shape memory alloy technology. Background technique [0002] Commonly used displacement sensors are mainly divided into two types: non-contact type and contact type. Laser displacement sensor is a more commonly used non-contact displacement sensor, which uses the principle of triangular reflection to measure displacement non-contact. Its advantage is that it has high measurement accuracy and does not interfere with the movement process of the measured object. However, it has relatively high requirements for the measurement environment, and the laser part must not vibrate, otherwise it will cause a large measurement error. [0003] Commonly used contact displacement sensors are strain gauge displacement sensors. It can be used in conjunction with secondary instruments such as strain gauges and digital voltmeters to measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02G01D5/353C22C1/00G02B6/46
Inventor 任亮李宏男
Owner DALIAN UNIV OF TECH
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