基于声光阵列的炸高测量技术研究

Research on Burst Height Measurement Technology Based on Acousto-optic Array

摘要:

针对炸高测量系统结构复杂、布阵繁琐、低信噪比下的炸高测量精度偏低的问题，提出一种立体六元声光阵列的炸高测量方法。详细介绍了该方法的炸高测试原理及结构组成，应用MATLAB建立了声光阵列结构的数学模型，深入分析了该结构的测量原理和最佳测量高度。仿真验证结果表明：该方法适用于爆炸高度为20~60m范围内的炸高测量，测试时应保证爆炸声信号到达传感器的时延估计误差小于20us、声光信号到达基阵时延估计误差绝对值在4ms范围内；最终靶场实验结果表明：在低信噪比的情况下，采用立体六元声光阵列结合改进的广义二次互相关算法在最佳测量高度范围内的炸高测量精度达到5%，可以应用于靶场炸高测量。

Abstract:

Aiming at the problems of complex structure of the explosion height measurement system, cumbersome array layout, and low accuracy of the explosion height measurement under low signal-to-noise ratio, a three-dimensional six-element acousto-optic array method for the explosion height measurement is discussed. The test principle and structure composition of the method are introduced in detail, the mathematical model of the acousto-optic array structure is established by MATLAB, and the measurement principle and key performance of the structure are deeply analyzed. The simulation verification results show that the structure is suitable for the explosion height measurement within the range of 20~60m. The test should ensure that the time delay estimation error of the explosion sound signal reaching the sensor is less than 20us, and the acousto-optic signal arrival time delay estimation error is absolute. The value is in the range of 4ms; the final range experiment results show that: in the case of low signal-to-noise ratio, the three-dimensional six-element acousto-optic array combined with the improved generalized quadratic cross-correlation algorithm can achieve 5% of the height measurement accuracy within the best measurement height range, which can be applied to the shooting range measurement.