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| Analysis of the sensitivity characteristics and structural optimization of dual-plane array electrostatic sensor |
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Abstract To address the issues of low sensitivity and uneven sensitive field distribution in the arrayed electrostatic sensor for online monitoring of abrasive particles in aviation engine lubricating oil, a comprehensive optimization of the sensor structure units was conducted through a combination of theoretical analysis and simulation. A novel double-plane 32-plate arrayed electrostatic sensor was designed, and the theoretical model of the sensor was established based on the point charge concept. The influences of plate thickness, coverage angle, length, and double-plane spacing on the sensor's sensitivity were investigated. Subsequently, the sensor configuration was optimized, and corresponding experimental samples were prepared. An experimental platform was set up for testing. The results indicated that the double-plane spacing L and plate length H were crucial factors in enhancing the sensor's sensitivity. The optimized sensor showed a 75.80% increase in sensitivity and a 56.05% improvement in uniformity. Experimental findings were consistent with the trends observed in finite element simulations. When L increased from 1 cm to 2 cm, the monitored voltage amplitude of the electrostatic sensor increased from 29.23 mV to 40.16 mV. Similarly, when H increased from 2 cm to 4 cm, the voltage amplitude increased to 76.43 mV. Further optimization of both L and H resulted in a voltage amplitude increase to 80.77 mV.
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Received: 06 November 2023
Published: 04 March 2025
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2025, Vol. 46 
