摘要
研究表明在用测量空气声速的办法来检验仪器的计时性能和操作者的测读方法中,如布置的测点数量太少或不采用首波等幅读数时,以时-距回归的直线斜率为空气声速的测量值随机误差很大。
Testing of ultrasonic velocity in air is a usual method to determine the instruments＇ accuracy and the operators＇ skill. However, if the sampling points are so few and the first wave amplitude is not equal, the velocity obtained by the time-dlstance linear equation has a huge deviation.
出处
《无损检测》
北大核心
2006年第9期456-457,共2页
Nondestructive Testing
关键词
超声波
空气
声速测量
Ultrasonic wave
Air
Ultrasonic velocity testing
