Design and implementation of the GNSS/INS integrated software for bridge monitoring based on GINav
In large-scale bridge monitoring,the accuracy and reliability of GNSS positioning are severely affected by environmental factors such as obstruction from bridge cables,towers,fences,and reflections from passing vehicles. INS technology operates autonomously after initial alignment,eliminating the influence of external environmental factors. By combining GNSS and INS technologies,GNSS's resistance to interference and positioning accuracy can be significantly improved. Therefore,targeting the requirements and characteristics of bridge deformation monitoring,we have designed and implemented GNSS/INS bridge deformation monitoring software based on the open-source navigation software GINav. This software includes features such as visualization of monitoring sites,automatic matching of raw data,IMU downsampling,GNSS/INS combined solution computation,and result analysis and evaluation. Vibration table simulations of bridge vibrations show that compared to GNSS-RTK technology,the GNSS-RTK/INS combination achieves significantly improved accuracy,with a mean error reaching 1/20 of the allowable deformation value for deformation monitoring,meeting the precision requirements of bridge deformation monitoring.
GNSSinertial navigation systemintegrated navigationbridge monitoringsoftware development
NETL
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