基于应变阵列的小型表面冲击定位系统设计

Small Surface Impact Positioning Technology Based on Strain Array

针对装甲单位对自身外部的观察手段有限,在深入步兵集群内部或陷入遭遇战时通常会有自检手段少、自身健康信息不足等问题,使用特殊内嵌式结构将应变片布置在装甲板内部,以HDOP值作为判断依据设计了应变阵列布置方式,依靠高性能的STM32H743MCU设计了小型系统,通过通道时差补偿、信号时延估计与TDOA定位算法,实现了装甲板表面冲击定位;实测结果表明:对40 kHz的正弦波信号五通道采样,使用所设计算法进行补偿后,通道一和通道五的时间同步精度可达97%,时延估计精度在98%左右;装甲表面定位误差小于1 cm,能够满足装甲表面冲击定位需求。

In view of the limited observation means of armored units on their own exterior,there are problems of lack of self-inspection means and insufficient health information when they go deep into the infantry cluster or get into the encounter war,a special embedded structure is used to arrange strain gauge inside the armor plate,and the strain array layout is designed based on the horizontal dilution of precision(HDOP)value as a judgment basis.A small system is designed by relying on a high-performance STM32H743MCU chip,the channel time difference compensation,signal delay estimation and time difference of arrival(TDOA)localization algorithm are used to realize the impact localization on the surface of armor plates;The actual measurement results show that after sampling five channels of a 40 kHz sine wave signal and compensating with the designed algorithm,the time synchronization accuracy of channel one and channel five can reach 97%,the accuracy of time delay estimation is around 98%;The positioning error of armor surface is less than 1 cm,which can meet the impact positioning requirements of armor surface.