ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Mathematical modelling and calibration experiment of new electrostatic sensor in aviation
Received date: 2014-11-13
Revised date: 2015-01-03
Online published: 2015-01-13
Supported by
Grant from National Natural Science Foundation of China and Civil Aviation Administration of China (60939003)
Electrostatic inductive sensor is a new kind of sensor for in-line monitoring of abrasive grains in aviation flow oil system. In order to study the characteristics of the electrostatic sensor, we improved the mathematical model of the electrostatic sensor and designed an electrostatic sensor calibration device. With high voltage electric field, calibration device could generate charged oil droplets whose charge and polarity were adjustable, and with the Faraday cup and electrometer the charge of the oil droplets could be measured accurately. Through qualitative analysis of the mathematical model and calibration experimental verification experiments, we determined the distribution of the sensor's spatial sensitivity; then we discovered and verified that the peak output voltage of the electrostatic senor and the inducing charge had a linear relationship when the charged droplets moved along a fixed radial position and at an instant velocity in the sensor. Through the calibration experiments, we obtained the sensor's calibration curve, quantitatively determined the static sensitivity of the sensor on the radial position and proved the correctness of the mathematical model.
MAO Huijie , ZUO Hongfu , HUANG Wenjie , YIN Yibing , LIU Chenning . Mathematical modelling and calibration experiment of new electrostatic sensor in aviation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(7) : 2242 -2250 . DOI: 10.7527/S1000-6893.2015.0007
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