智能型与模拟型超声仪测量声时的对比试验  

Contrast Experiments of Ultrasonic Velocity Between Digital and Analog Ultrasonic Detectors

作　　者：童寿兴[1] 

机构地区：[1]同济大学材料科学与工程学院,上海200092

出　　处：《无损检测》2008年第2期110-111,114,共3页Nondestructive Testing

摘　　要：采用不同种类、不同型号的超声仪对同一匀质环氧树脂试件进行声时测量对比试验,发现不同仪器会导致测量的声时数据存在偏差,直接影响超声声速检测值的准确性。分析表明影响匀质试件超声检测结果的原因是操作者对仪器开机时扣除零读数t0方法的不准确,该偏差与使用模拟型还是智能型超声波检测仪无关。Using different types of ultrasonic detectors to make contrast experiments were described. In these experiments, when tests were made on the same concrete sample, the accuracy and reliability of the experiments may be directly affected by the time deviation caused by using different ultrasonic detectors. The prime reason of the time deviation was caused by the test method, in which the operator used to deduct the initial time value t0, and it had nothing to do with the types of the digital and analog detect...

关 键 词：无损检测 超声波检测仪 声速 校零 

分 类 号：TG115.285[金属学及工艺—物理冶金]