Wear-site electrostatic sensors are one of the common sensors used for online monitoring of the wear status of mechanical systems.In order to realize the analysis of its monitoring performance,this paper constructs a three-dimensional simulation model based on the structural characteristics of the wear area electrostatic sensor to study the effects on the sensor characteristics and monitoring performance when changing the diameter of the sensor probe and the spatial location of the point charge.A gear electrostatic monitoring test platform is built to monitor gears faults by electrostatic sensors with various sizes of wear area.The collected gear wear electrostatic signals are analyzed and results show that the spatial sensitivity of the sensor increases as the diameter of the probe increases,i.e.,the better the monitoring performance of the corresponding sensor.The trend of experimental test results is consistent with the trend of simulation results,which verifies the accuracy of the proposed model.The research results are significant to the subsequent design optimization and engineering application of electrostatic sensors in wear-site.
electrostatic sensorwear areamodeling and simulationfinite element analysistest platform
NETL
NSTL
万方数据
