Title:
OPTICAL FIBER GRATING HIGH-TEMPERATURE STRAIN SENSOR AND CALIBRATION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/151798
Kind Code:
A1
Abstract:
An optical fiber grating high-temperature strain sensor, comprising a sensor substate (10), optical fiber mounting arms (11) provided on the sensor substrate (10), strain sensitive optical fibers (21, 22, 23), a temperature compensation optical fiber (24), bosses (14, 14'), and stretching rods (12). The sensor substrate (10) is in the shape of a circular ring, the optical fiber mounting arms (11) are formed by extending inwards along the inner circumference of the sensor substrate (10), and the optical fibers (21, 22, 23) are disposed along a diameter direction of the sensor substrate (10); the temperature compensation optical fiber (24) is used for compensation of a strain testing result; the bosses (14, 14') having different heights are provided on the sensor substrate (10); and the bosses (14, 14') are used for fixing the optical fibers (22, 23), and are used for avoiding cross contact among different optical fibers (21, 22, 23). According to the optical fiber grating high-temperature strain sensor, the influence of temperature on a strain measurement result is eliminated; design of the bosses (14, 14') on the sensor substrate (10) can effectively avoid a chirp phenomenon caused by the cross contact of FBG optical fibers (21, 22, 23); and the strain sensor has advantages of a simple structure, a small size, accurate positioning, synchronous multi-directional strain measurement, temperature compensation, high measurement accuracy, and the like.
Inventors:
WANG HONGKE (CN)
LIN LEI (CN)
XU DECHENG (CN)
CHEN MINGYA (CN)
QI YUWEI (CN)
ZHOU SHUAI (CN)
GAO HONGBO (CN)
ZHANG GUODONG (CN)
CHEN XIAOWEI (CN)
LIN LEI (CN)
XU DECHENG (CN)
CHEN MINGYA (CN)
QI YUWEI (CN)
ZHOU SHUAI (CN)
GAO HONGBO (CN)
ZHANG GUODONG (CN)
CHEN XIAOWEI (CN)
Application Number:
PCT/CN2021/127547
Publication Date:
July 21, 2022
Filing Date:
October 29, 2021
Export Citation:
Assignee:
SUZHOU NUCLEAR POWER RES INSTITUTE CO LTD (CN)
CHINA GENERAL NUCLEAR POWER GROUP (CN)
CGN POWER CO LTD (CN)
CHINA GENERAL NUCLEAR POWER GROUP (CN)
CGN POWER CO LTD (CN)
International Classes:
G01B11/16; G01D18/00
Foreign References:
| CN112833809A | 2021-05-25 | |||
| CN110530282A | 2019-12-03 | |||
| CN106767486A | 2017-05-31 | |||
| CN208736449U | 2019-04-12 | |||
| CN103940359A | 2014-07-23 | |||
| CN102853856A | 2013-01-02 | |||
| JP2009162601A | 2009-07-23 |
Attorney, Agent or Firm:
SUZHOU CREATOR PATENT & TRADEMARK AGENCY, LTD. (CN)
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