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传统感应设备通常采用接触式的方法检测超声波,抗噪性能差,容易对被检测物体造成损坏,并且检测效率较低。因此,设计基于光纤干涉仪的智能感应设备,其采用上位机调控步进机的转速,通过步进电机带动光纤干涉仪精确运动检测物体超声波,光纤干涉仪将采集的超声波数据通过数据采集器反馈给上位机,通过上位机进行数据的显示、保存和分析。给出了设备软件上位机功能设计流程,对感应设备中的光纤干涉仪检测过程进行分析,获取待测物体的位移。实验结果说明,设计的智能感应设备可检测物体中激光激发的超声表面波,对物体表面声波的传播速度和位移进行测量。
Conventional sensing equipment usually adopts the contact method to detect the ultrasonic wave, has poor anti-noise performance, easily causes damage to the detected object, and has low detection efficiency. Therefore, the design of intelligent sensing device based on optical fiber interferometer, which uses the host computer to control the speed of the stepper, through the stepper motor driven optical fiber interferometer accurate motion detection object ultrasonic, optical fiber interferometer will gather the ultrasonic data through the data collector feedback To the host computer, through the host computer data display, preservation and analysis. The functional software design process of the host computer is given. The fiber optic interferometer detection process in the sensing device is analyzed to obtain the displacement of the object under test. The experimental results show that the designed smart sensing device can detect laser-excited ultrasonic surface wave in the object and measure the propagation velocity and displacement of the surface acoustic wave.