基于DSP的纳机电矢量水听器定向系统设计

Design of NEMS Vector Hydrophone Directional System Based on DSP

利用单个矢量水听器实现水下声目标方位估计,较传统标量水听器估计方法简单且容易实现。纳机电矢量水听器具有灵敏度高、低频特性好、尺度小等优良特性。基于这种新型矢量水听器,采用DSP TMS320F2812处理器实现对水下声目标方位的实时估计和显示。给出了定向系统总体和各个模块设计原理,完成了相应的硬件电路与软件实现。试验结果表明:系统能稳定地对传感器的输出信号进行采集和角度计算,并能实时显示水下声目标的方位角度,角度误差小于2°。

Using a single vector hydrophone to achieve underwater acoustic target DOA estimation is more easy than traditional scalar hydrophone estimation method. NEMS vector hydrophone has high sensitivity, low-frequency characteristic and small-scale features. DSP TMS320F2812 processor based on this vector hydrophone is used to achieve underwater acoustic target-directional real-time es- timation and display. The design principles of overall system and each module are given. The corresponding hardware circuits and software implementation are also accomplished. The results showed that the system can collect the output signal of the sensor and calculate angle steadily and real-time display the azimuth of underwater acoustic target with the error is less than 2°.