针对离岸深水网箱养殖的鱼群安全问题,采用多波束水声技术监测鱼群状态的方法.结合信号处理技术、通用分组无线业务(GPRS)无线传输技术及串口通信技术,开发了一套多波束水声鱼群状态监测仪.监测仪完成1次网箱扫描只需5s；实现了监测数据的即采即发功能,提高了系统的实时性；改进了电路结构,降低了系统复杂度,减小了系统体积,降低了成本.试验表明,监测仪操作简便,性能稳定,能有效完成深水网箱的实时监测任务.%To the security issue of fish shoal in offshore fish cage, a monitoring method based on multi-beam underwater acoustic technique is employed. Integrating with the techniques of signal processing, GPRS wireless data communication and serial interface communication, a multi-beam underwater acoustic monitoring system for breeding fish in offshore fish cage is designed. It takes only five second to accomplish an entire cage scanning. Detecting data are delivered to the user monitoring system immediately upon acquisition, which improves the real-time property of the system. As its circuit is improved, the system structure is simplified. Both the volume and the cost of the monitor is reduced. Tests show that the monitoring system is simplified, easy placement and robust under different environmental conditions. It is well performed in real-time monitoring fish in offshore fish cage.
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