水下通信中的异常声压监控网络系统设计

Design of Abnormal Sound Pressure Monitoring Network in Underwater Rommunication System

传统水下通信声压异常监控网络存在无法自主完成节点的投放和回收,存储监控盲区并且无法进行动态组网,不能对异常声压进行准确的监控等较大的缺陷;为此,设计并实现了一种新的水下异常声压监控系统,系统中的通信协议基于节点间的深度信息完成数据的转发,给出了系统中监控器、CC2430处理器、终端节点以及协调器节点的硬件设计原理并给出了系统采集数据的软件流程;系统中实现了对链路层的AODV路由协议进行改进,增强系统对异常声压的监控性能;测试结果说明,该系统获取的声压监测星座图明显优于传统系统,在不同的干扰类型下,发射信号使用PSK调制,载波中心频率是10kHz,采样率是50kHz,码率是2 000bit/s;实验结果表明:该种系统具有较低异常声压信号监控误差率,可对异常声压信道的传输特性进行较好的校正和补偿,具有较强稳定性。

Traditional underwater communication abnormal sound pressure monitoring network is unable to independently completed node resources and recycling, store the monitoring blind area and the ability for dynamic network, cannot be accurately for abnormal sound pres- sure monitoring such as larger defects. Therefore, designs and realizes a new kind of underwater abnormal sound pressure monitoring sys- tem, communication protocol based on the depth of information between nodes in the system, the complete data forwarding, gives the system monitor, CC2430 processor, terminal node, and the coordinator node hardware design principle, system data software flow is given. Link layer system realized with improved AODV routing protocol, and enhance the system monitoring performance of abnormal pressure. Test re sults indicate that the acoustic pressure monitoring constellation diagram of the system is obviously better than the traditional system, under the interference of different types, the emission signal using PSK modulation, carrier center frequency is 10 kHz, sampling rate is 50 kHz, bit rate is 2000 bit/s. Experimental results show that this system has a low error rate, abnormal sound pressure signal monitoring for abnor mal sound pressure channel transmission characteristics can be better calibration and compensation, has strong stability.