title: A Novel Method for Proximity Detection of Moving Targets Using a Large-Scale Planar Capacitive Sensor System.
abstract: A novel method for proximity detection of moving targets (with high dielectric constants) using a large-scale (the size of each sensor is 31 cm × 19 cm) planar capacitive sensor system (PCSS) is proposed. The capacitive variation with distance is derived, and a pair of electrodes in a planar capacitive sensor unit (PCSU) with a spiral shape is found to have better performance on sensitivity distribution homogeneity and dynamic range than three other shapes (comb shape, rectangular shape, and circular shape). A driving excitation circuit with a Clapp oscillator is proposed, and a capacitance measuring circuit with sensitivity of 0.21 V p - p / pF is designed. The results of static experiments and dynamic experiments demonstrate that the voltage curves of static experiments are similar to those of dynamic experiments; therefore, the static data can be used to simulate the dynamic curves. The dynamic range of proximity detection for three projectiles is up to 60 cm, and the results of the following static experiments show that the PCSU with four neighboring units has the highest sensitivity (the sensitivities of other units are at least 4% lower); when the attack angle decreases, the intensity of sensor signal increases. This proposed method leads to the design of a feasible moving target detector with simple structure and low cost, which can be applied in the interception system.
authors.affiliation: School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China. yy_bit_dr@163.com.|Science and Technology on Electromechanical dynamic Control Laboratory, Beijing Institute of Technology, Beijing 100000, China. yy_bit_dr@163.com.
authors.forename: Yong
authors.initials: Y
authors.lastname: Ye
authors.affiliation: School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China. bitdjh@bit.edu.cn.|Science and Technology on Electromechanical dynamic Control Laboratory, Beijing Institute of Technology, Beijing 100000, China. bitdjh@bit.edu.cn.
authors.forename: Jiahao
authors.initials: J
authors.lastname: Deng
authors.affiliation: School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China. shen_san_min@163.com.|Science and Technology on Electromechanical dynamic Control Laboratory, Beijing Institute of Technology, Beijing 100000, China. shen_san_min@163.com.|National Key Laboratory of Electronic Measurement Technology, North University of China, Taiyuan 030051, China. shen_san_min@163.com.
authors.forename: Sanmin
authors.initials: S
authors.lastname: Shen
authors.affiliation: School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China. houtso@163.com.|Science and Technology on Electromechanical dynamic Control Laboratory, Beijing Institute of Technology, Beijing 100000, China. houtso@163.com.|National Key Laboratory of Electronic Measurement Technology, North University of China, Taiyuan 030051, China. houtso@163.com.
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Hou
authors.affiliation: School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China. liuyuting0531@126.com.|Science and Technology on Electromechanical dynamic Control Laboratory, Beijing Institute of Technology, Beijing 100000, China. liuyuting0531@126.com.
authors.forename: Yuting
authors.initials: Y
authors.lastname: Liu
keywords: moving target; planar capacitive sensor; proximity detection; sensitivity distribution