为达到虚拟检测光纤水听器信号的软件程序设计的目的,采用其输出信号特点,依据非NI采集卡特性,对3×3耦合解调原理和数学模型进行分析和比较,做了干涉型光纤水听器ITT虚拟检测方案,通过调用动态链接库开发基于Lab-VIEW的数据采集程序,编写数据处理和显示程序,开发光纤水听器3×3耦合器零差解调法虚拟检测系统.得到该虚拟检测系统具有很好的幅值适应性和低频特性的结论.%In order to achieve a pupose to virtual measure software program design for fiber-optic hydrophone, this paper uses characteristics of its output signals. Based on the non-NI acquisition card, the 3x3 coupler demodulation principle and its mathematical model are analysed and compared, and the interferometric fiber-optic hydrophone ITT virtual device detection program is designed. By calling a dynamic link library, the LabVIEW-based data collection program, the data processing and display program are developed, which makes up an ITT virtual detection system for fiber-optic hydrophone. Then, draws a conclusion that this virtual test system is of a good amplitude and frequency characteristics of the adaptive.
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