水中近距声探测器研究

根据近感检测原理分析了近炸引信的近距声探测原理和系统组成;设计了工作可靠,方向性好,灵敏度高的声探测器针状式离散波束图;确定了适用于浅海近距探测的高频窄带发射脉冲的工作频率和多卜勒频移极限门限值;讨论了对较小目标的搜索范围和作用距离.采用蒙特卡罗法对这种声探测装置探测较小类目标进行了计算机模拟仿真,结果表明,检测概率随弹目交会速度的提高近似直线下降,多卜勒频移极限门限值取3时的检测概率在80%以上,满足近炸作用半径要求.

A Study on Close-Range Underwater Detectors

Ultrasonic detection principle, proximity sensing, and system composition for proximity acoustic fuzes are analyzed. The needle shape disperse beam pattern of acoustic detector, having fine directionality, high sensitivity and high detection probability, has been adopted in the design, where high frequency, low power dissipation CW transmission that is used in shallow sea, with close range Doppler shift threshold have been selected for use. The searching area and acceptance range for small targets are discussed, and simulation has been done based on the acoustic detection device, using the Montecarlo method. The results have shown that the detection probability is almost linearly with improvement for motion relocity of intersection between sheel and target, with the detection probability exceeding 80% when the Doppler shift threshold is chosen at 3. It meets the requirement of the proximity acting radius.