摘要
目前测量液体声速的实验装置一般通过摇动手柄转动精密丝杆导轨移动装置,从而改变超声波换能器之间的距离,操作过程比较繁琐,容易产生空程误差;且采用示波器来观察信号,连线复杂,操作麻烦,容易出错;一般只能测室温下液体声速。为了克服上述不足,提出一种改进的实验装置,可以测量不同温度下液体声速。通过直线电机改变换能器之间的距离,可以避免空程误差,操作过程简单。该装置可直接测量并显示超声波接收换能器接收到的声波信号转换成的电压信号,直观方便。
Since the current experimental device for measuring the liquid sound velocity generally uses the slideway movement device of precision screw rod shaken by the handle to change the distance between the ultrasonic transducers,it has tedious operational process and is prone to generate idle stroke error. The oscilloscope is used to observe the signal,which has complex wired line and troublesome operation,and is easy to make mistakes. The current experimental device only can measure the liquid sound velocity at room temperature. In order to overcome the above disadvantages,an improved experimental device is put forward,which can measure the liquid sound velocity at different temperatures. The linear motor used to change the distance between the transducers can avoid the idle stroke error,and has simple operational process. The device can directly measure and display the acoustic signal received by the ultrasonic receiving transducer,and then convert the acoustic signal into voltage signal. The device is intuitive and convenient.
出处
《现代电子技术》
北大核心
2016年第11期141-143,148,共4页
Modern Electronics Technique
基金
郑州市重点实验室建设项目(电子信息技术实验室)(ZZLG201414)
关键词
声速
超声波换能器
实验装置
直线电机
sound velocity
ultrasonic transducer
experimental device
linear motor
