基于虚拟仪器的底质声学测试系统设计

为解决在不具备海洋远洋原位测试的情况下仍然需要对沉积物进行还原海底环境声学测试的问题，将虚拟仪器技术应用于沉积物测试中，建立可以在实验室中还原海底环境的声学测试系统。采用虚拟仪器智能判断首波的方法测试沉积物在相应环境的声速，应用虚拟仪器频谱分析技术实现对超声波信号的滤波及分析，利用Labview工具编写软件实现超声测试与温度和压力的测量与控制同步。建立小尺度地质物理模型可以通过对海洋底质沉积物样品施以温度、压力控制，在实验室内还原海底特殊环境，同时对沉积物样品进行超声无损探测。在测试系统平台上对远洋获取的沉积物进行声速测试实验，对比传统方法测试实验，实验结果表明测试系统操作简单、可还原样品环境、实用性强。

Design of Marine Sediment Ultrasonic Testing System Based on Virtual Instrument

In order to solve the problems of lack of the Long-range navigation and in-situ measurement to restore the environment of the acoustic test, virtual instrument technology is used in ultrasonic testing system. When uses virtual instruments the system can intelligently judged the first wave and test sediment sound velocity in the corresponding environment. The paper uses virtual instrument spectrum analysis to filter ultrasonic signals. Virtual instrument platform is used in ultrasonic testing synchronization with the temperature and pressure measurement. The small-scale physical model of geological samples can be im- posed by the temperature control, pressure control, submarine simulation. Meanwhile, ultrasound nonde- structive detection of sediment samples are found. The researchers do experiments to test samples for the speed of sound and compared with the traditional method of testing laboratories. The experimental results show that the system is simple, can restore the sample environment and Dractieabilitv.