Calculation Model of Projectile Explosion Position by Using Acousto-Optic Combination Mechanism

In order to accurately calculate the projectile explosion position, this paper takes the five acoustic sensors as a basic array, and proposes a test method for the projectile explosion position based on acousto-optic combination detection of triangular basic array and form acousto-optic combination test system. Combining with the spatial layout of triangular basic array, we derive the calculation model of projectile explosion position parameters of each basic array; use the wavelet transform analysis method to filter the acoustic sensor signal, and utilize the cross-correlation function to establish the time delay estimation processing model of the projectile explosion acoustic signal in the same basic array and obtain the time difference of each sensor in the basic array. According to the basic array acoustic sensor collected signal in experiments, we analyze the distribution characteristics of acoustic signal strength generated by different projectile explosion, and calculate the projectile explosion position. By comparing with the height parameter data collected and processed by high-speed camera, the results show that the measurement accuracy of the proposed method is better than 0.6m in the range of 150m $\times150\text{m}$ , which verify the efficiency of the measurement method of projectile explosion position by using acousto-optic combination test mechanism.