采用标准棒扣除换能器t_0产生误差的成因  

The Causes of Error by Using Standard Bar to Deduct the t_0 Reading of Transducer

作　　者：童寿兴[1] 伍根伙[1] 

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海200043

出　　处：《无损检测》2011年第1期72-74,共3页Nondestructive Testing

摘　　要：混凝土超声波换能器的t0读数通常采用标准棒的方式测量和扣除。揭示了按照检测规范要求,取超声首波波幅为"等幅读数"时,由于检测人员思维的习惯性,机械教条地运用该操作方法,产生了t0读数误差的原因,这将造成混凝土声速计算错误的不良结果。提出了运用标准棒扣除换能器t0读数时的正确操作方法。Usually we measure and deduct the t 0 reading of concrete ultrasonic transducer by using the standard bar.But when taking the head wave amplitude as ＂the constant-amplitude reading＂ according to the testing standard,it always causes the error of t 0 reading.The routine thought of operator and doctrine using of this operating procedure will certainly lead to the mistake of sonic speed miscalculation.It was showed the collect ways of deducting the t 0 reading of transducer by using standard bar.

关 键 词：超声波检测 混凝土标准棒 误差分析 

分 类 号：TG115.28[金属学及工艺—物理冶金]