一体化标量水听器的设计

Design of an integrated scalar hydrophone

针对水下目标探测的问题,提出一种低频、小体积、灵敏度高、抗干扰能力强的水听器,该水听器采用一体化设计,通过取2个变量的最佳平衡点和在电路部分增大增益的方法,解决了传感器尺寸与频响之间的矛盾;同时针对如何降低传感器的干扰问题,本标量水听器采用高输入阻抗的阻抗变换电路,并通过吸声结构加阻尼的方法限制部分干扰,采用静电屏蔽技术,同芯电缆传输信号,很大程度上降低了传感器的干扰。结果表明:提出的一体化标量水听器灵敏度高于-158 dB,具有低频、小体积、高灵敏度、抗干扰能力强的特点,可用来在水下探测目标的声音信号。

Aiming at problem of target detecting under water, a hydrophone with low frequency, small size, high sensitivity and strong anti-interference capability is put forward. The presented integrated scalar hydrophone solves the contradiction between the size and frequency response through choosing the best balance point and increasing gain in the circuit parts, meanwhile aimed at how to reduce the hydrophone interference issues, high input impedance transformation circuit is used in the integrated scalar hydrophone and partial interference is restricted, using absorption structure with damp, electrostatic shielding techniques is used and core cable is used to transmit signals to restrain the interference greatly. The result shows the presented integrated scalar hydrophone has low frequency,small size, high sensitivity above- 158 dB, and strong anti-interference capability, it can be used for detecting sound signal of target under water.