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目前,我国在无损检测中广泛应用的超声波探伤,大多是手工操作的,一般没有探头固定装置,因而在探伤操作中存在不少困难,尤其是在一些探伤位置不佳的部位,这些问题更显得突出.例如,我们在对管道或容器,特别是在管道和容器下半部进行仰面探伤时,从荧光屏上发现缺陷信号显示后,要进行定位测量和定量测量.这时就需要使用钢直尺及进行仪器衰减旋钮的操作,或用记录笔对缺陷位置进行标示.可想而知,此时操作人员一只手压着探头,而另一只手要进行上述情况的操作,自然是很不方便的.探头稍有移动,就会造成定量定位测量的误差.为求得较为
At present, the ultrasonic flaw detection widely used in non-destructive testing in our country is mostly manual operation, and generally there is no probe fixing device, so there are many difficulties in the flaw detection operation, especially in some flaw detection sites, these problems appear more For example, when we inspect the pipe or container, especially in the lower half of the pipe and container, we can locate and measure the defect after the defect signal is displayed on the screen, then use the steel ruler And instrument attenuation knob operation, or use the stylus to mark the location of defects.It can be imagined, this time the operator pressed the probe with one hand, and the other hand to carry out the operation of the above situation, of course, is not Convenient probe slightly moving, it will result in quantitative positioning error measurement.