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In view of the limited observation means of the armored units on their own exterior, the 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 HDOP value as the judgment basis. A small system is designed by relying on the high-performance STM32H743MCU, which uses channel time difference compensation Signal delay estimation and TDOA localization algorithm have achieved impact localization on the surface of armor plates; The actual measurement results show that after sampling five channels of a 40KHz 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 the armor surface is less than 1cm, which can meet the impact positioning requirements of the armor surface..