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利用微波对玻璃钢抽油杆模拟缺陷进行无损检测 ,在信号源功率、频率以及发射探头和穿透接收探头形式确定的前提下 ,改变穿透接收探头与被测试件之间的相对位置对于缺陷信号的灵敏度、分辨率有很大的影响 .在采用双通道检测时 ,穿透接收探头处于与被测试件 80～ 1 40 mm位置对缺陷信号的反映程度与其处于 1～ 2 0 mm位置有明显的区别 :反射信号波没有明显的变化 ,而穿透法所反映的信号波却发生了很大变化 ,缺陷处信号波部分成为封闭的矩形条 ,矩形条的高度相同 ,宽度不同 .矩形条的宽度是缺陷实际大小的综合反映 ,与穿透探头处于 1～ 2 0 mm相比 ,有无缺陷一目了然且便于计算机识别 .
The use of microwave non-destructive testing of glass fiber reinforced plastic sucker rod simulation defects in the signal source power, frequency, and transmit probes and penetrate the receiving probe to determine the form under the premise of changing the penetration of the receiving probe and the relative position between the test piece for the defect signal Sensitivity and resolution have a great impact on the use of dual-channel detection, the penetration of the receiving probe in the test piece 80 ~ 140 mm position of the defect signal and its reflection in the position of 1 ~ 20 mm obvious The difference is that there is no obvious change of the reflected signal wave, but the signal wave reflected by the penetration method has changed greatly. The signal wave part of the defect becomes a closed rectangular strip, the height of the rectangular strip is the same, and the width is different. Is a comprehensive reflection of the actual size of defects, compared with penetrating the probe at 1 ~ 20 mm, with or without defects at a glance and easy for computer identification.