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静电传感器是一种用于航空发动机润滑油路中磨粒在线监测的新型传感器,为了对静电传感器的特性进行研究,改进了静电传感器的数学模型,设计了静电传感器标定装置。标定装置通过高压电场使油滴荷电,可以产生电量和极性可调的带电油滴,并可通过静电计准确测量产生的油滴电量。通过对数学模型的分析,以及标定实验的实验研究,确定了传感器的空间灵敏度分布;发现并验证了定速带电油滴沿着传感器固定径向位置移动时,静电传感器输出电压的峰值与施感电荷呈线性关系;通过标定实验获得了传感器的标定曲线,并进一步定量确定了传感器静态灵敏度在径向位置上的分布,标定实验也同时验证了数学模型的正确性。
Electrostatic sensor is a new type of sensor used for the on-line monitoring of abrasive particles in aeroengine lubricating oil road. In order to study the characteristics of electrostatic sensor, the mathematical model of electrostatic sensor is improved and the electrostatic sensor calibration device is designed. The calibration device charges the oil droplets through the high-voltage electric field, which can generate charged oil droplets with adjustable charge and polarity, and accurately measure the amount of oil droplets generated by the electrometer. Through the analysis of the mathematical model and the experimental study of the calibration experiment, the spatial sensitivity distribution of the sensor was determined. The peak value of the electrostatic sensor output voltage and the sensing effect of the electrostatic sensor were found and verified when the fixed charged oil drop moved along the fixed radial position of the sensor The calibration curve of the sensor was obtained through calibration experiment. The distribution of the static sensitivity of the sensor in the radial position was further quantitatively determined. The calibration experiment also verified the correctness of the mathematical model.