Abstract
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.
Highlights
In the field of weapon test, the projectile explosion position parameters are important indicators
In order to further improve the parameter accuracy of the projectile explosion position, this paper takes the five acoustic sensors as a basic array, studies a test method for the projectile explosion position based on acousto-optic combined detection of triangular basic array composed by three basic arrays
The working principle of the test system is as follows: when the projectile explodes in the specified area, the firelight signal is captured by the photoelectric detection device to trigger the triangular basic array capture the acoustic signal of the projectile explosion; at the same time, according to the spatial layout relationship of the three basic arrays, the time information of the projectile explosion outputted by acoustic sensors is obtained by the signal acquisition and processing module; and the coordinates of the projectile explosion position can be calculated by the upper machine
Summary
In the field of weapon test, the projectile explosion position parameters are important indicators. In order to further improve the parameter accuracy of the projectile explosion position, this paper takes the five acoustic sensors as a basic array, studies a test method for the projectile explosion position based on acousto-optic combined detection of triangular basic array composed by three basic arrays. The working principle of the test system is as follows: when the projectile explodes in the specified area, the firelight signal is captured by the photoelectric detection device to trigger the triangular basic array capture the acoustic signal of the projectile explosion; at the same time, according to the spatial layout relationship of the three basic arrays, the time information of the projectile explosion outputted by acoustic sensors is obtained by the signal acquisition and processing module; and the coordinates of the projectile explosion position can be calculated by the upper machine. Combined with the relative offset relationship between these three coordinates and coordinate system oxyz , the final explosion position P x, y, z is determined by calculating the average value, that is: x xA xB 3
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