Design and implementation of the GNSS/INS integrated software for bridge monitoring based on GINav

doi:10.13474/j.cnki.11-2246.2024.0801

Abstract

Abstract: 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.

Key words: GNSS, inertial navigation system, integrated navigation, bridge monitoring, software development

CLC Number:

P228

MA Weihao, DAI Wujiao, YU Wenkun, LI Xin. Design and implementation of the GNSS/INS integrated software for bridge monitoring based on GINav[J]. Bulletin of Surveying and Mapping, 2024, 0(8): 1-7.

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