Passive Wireless Bolt Loosening Fault Location Algorithm Based on RFID
RAN Yunzheng
LU Luoping
XIE Rong
SONG Kun
TIAN Xiangpeng
LIANG Huijun
ZHONG Jianwei
LIAO Honghua
Abstract：Addressing the issue of bolt loosening fault localization on the cone access door of hydroelectric generating unit,the improved virtual reference elimination(VIRE)algorithm was proposed,which was based on passive wireless radio frequency identification(RFID)technology.Initially,the received signal strength indicator(RSSI)values of all tags within the bolt loosening fault identification nodes under an ultra-high-frequency RFID reader were determined.Subsequently,spline interpolation method was employed to insert virtual tags,enabling the calculation of RSSI values for tags within virtual bolt loosening fault identification nodes.Finally,a dynamic threshold(Th)was adopted to optimize the number of tags within the nearest bolt loosening fault identification nodes,and the positioning coordinates of the tags within the tested bolt loosening fault identification nodes were determined and recorded.The average of a set of results was taken as the final outcome.The results indicated that the average positioning error of the improved VIRE algorithm was 98.72%and 25.27%lower than that of the location identification based on dynamic active RFID calibration(LANDMARC)algorithm and the traditional VIRE algorithm,respectively.This research can satisfy the positioning requirements for bolt loosening faults on the cone access door of hydroelectric generating units in complex environments.
Keywords：RFIDlocalization algorithmRSSI valuebolt looseningfault locationspline interpolation methoddynamic threshold
Publication Date：2024-09-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 401-408 )