针对水声信号复杂多变和数据采集卡价格昂贵等问题,提出基于声卡采集及虚拟仪器技术的多功能水声信号发生和数据采集显示控制系统设计方法,并以LabVIEW为设计平台,利用声卡及NI-DAQ设备实现对多功能水声信号的控制、发射、显示和对音频信号的采集、显示.系统不仅能够作为虚拟信号源产生所需信号用于水声发射机,而且能够利用声卡采集测量模拟音频信号并实时显示.将系统产生发射信号作用于水声功率放大器,结合实际应用验证,表明该系统能够有效实现对所需实际信号的发生与控制.本研究设计的控制输出及采集输入模块集成度高,通用性强,且减小了硬件开销,界面友好、价格低廉、操作简便,便于推广应用.

In view of underwater acoustic complex signal and expensive data acquisition card, based on sound card acquisition and virtual instrument technology, a multi-function underwater acoustic signal generator and data acquisition display control system generator method are proposed. And the sound card and NI-DAQ devices are used to realize multi-function underwater acoustic signal control, transmission, display and audio signal acquisition, display based on the platform of LabVIEW. The system not only could be used as a virtual signal source for generating the desired signal used by underwater acoustic transmitter, but also the sound card could be used to acquire and measure audio analog signal, then display the signal in real time. The emission signal generated by the system is acted on an underwater acoustic power amplifier and practical applications are combined with for the purpose of laboratory validation. Results indicate that the system is able to effectively generate and control the actual signal needed. The module design for both control output and gathering input has high degree of integration, versatility; the hardware cost is reduced. The system possesses the advantage over friendly interface, low cost, and simple operation for spreading.