IMPACT POSITION STANDARDIZING AND UNEXPLODED BOMB IDENTIFYING APPARATUS

摘要

PROBLEM TO BE SOLVED: To accurately estimate without influence to weather by receiving a flying sound or an explosion sound of an artillery shell by at least four acoustic sensors separately installed in advance and estimating an impact point or the like of the shell by utilizing a change in a Doppler frequency or time difference of the like for an explosion sound to arrive at a plurality of sensors. ;SOLUTION: The impact position standardizing and unexploded bomb identifying apparatus comprises at least four acoustic sensors 7a to 7d separately installed in advance. Their detection signals are input to signal processors 10a to 10d, passed through a band-pass filter, then A-D converted into digital signals, the digital signals are further converted into an RF band, which are in turn transmitted to a signal processor through transmitters 11a to 11d. The data received by the processor are transferred to signal processors 14a to 14d, and rising times of explosion sounds are measured. Then, a temporary impact position Pa is obtained by an arithmetic circuit 15 by utilizing an explosion sound arriving time difference, a change in the Doppler frequencies or the like between the systems, and corrected based on influences of an air temperature and a wind to estimate an impact position Px.;COPYRIGHT: (C)2000,JPO