【摘要】 本文介绍了采用窄脉冲探头和脉冲回波法测量Zr-4合金管材壁厚的超声仪器和方法。壁厚测量是通过测量界面回波间隔时间来实现的。由于在信号处理和电路设计中作了改进,仪器可达到微米级测量精度。文中还介绍了采用金相实验方法标定参考标准管的工作。更多还原

【Abstract】 A method of using the narrow pulse transducer and pulse echoes for measuring the wall thickness of Zr-4 tube is presented. The wall thickness is determined by measuring the interval time of echoes at the interfaces. The accuracy of this device can reach to micrometer ranges due to improvements of the signal processing and circuit designing. A metallographic examination method for calibrating the reference of standard tube is also given.更多还原