Patent AU-2020420496-B2 (AU)
Title: Apparatus and method for measuring straightness of distributed scraper conveyor working surface based on optical fiber sensing
Inventor: XU SHAOYI
IPC: B65G19/18
Filed: 2020-04-21
Granted: 2022-09-01
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(71) $ i ': * M -tk CH (CHINA UNIVERSITY _ IT [ ri H t4 N X ) 1M , Jiangsu 221116 
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(54) Title: APPARATUS AND METHOD FOR MEASURING STRAIGHTNESS OF DISTRIBUTED SCRAPER CONVEYOR 
WORKING SURFACE BASED ON OPTICAL FIBER SENSING 
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(57) Abstract: An apparatus and method for measuring the straightness of adistributed scraper conveyor working surface (9) based on 
optical fiber sensing. The apparatus comprises abroadband light source (1), afirst optical fiber circulator array (2), asecond optical fiber 
__circulator array (4), acollimator array (5), areflecting film array (6), athird optical fiber circulator array (7), and an optical path analyzer 
(8). When the light emitted by the broadband light source (1) is transmitted, the light of different wavelengths is separated by several 
gratings (3) engraved on asingle-mode optical fiber, reaches reflecting films (61, 62, 63) attached to the scraper conveyor working 
surface (9) by means of afirst optical fiber circulator A, asecond optical fiber circulator B, and collimators (51, 52, 53), isreflected 
Back by the reflecting films (61, 62, 63), enters the single-mode optical fiber by means of athird optical fiber circulator C, and finally 
enters the optical path analyzer (8). The optical path analyzer (8) analyzes the transmission distance of the light of different wavelengths 
to obtain position points of the reflecting films (61, 62, 63) soas toobtain thestraightness ofthe scraperconveyor working surface 
S(9). The measurement apparatus and method have advantages of simple structure, strong anti-electromagnetic interference capability, 
High precision, and long-distance measurement.  
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