管状物内壁的痕迹物证一直以来难以提取和固定,近年电子内窥镜技术迅速发展,内窥镜尺寸得以缩小、成像质量得以改善,器件成本低廉,从而在基层单位使用电子内窥镜对管状物内壁的痕迹物证进行固定成为可能。电子内窥镜可以探入到普通单反相机无法拍摄的位置记录固定痕迹物证,为无损检验疑难客体提供了一种新的方法。 The evidence of the inner wall of the tube has been difficult to extract and fixed. In recent years, the rapid development of electronic endoscope technology, endoscopic size can be reduced, the imaging quality can be improved, the device cost is low, so the grass-roots units use electronic endoscopy on the tubular Wall traces of evidence to be fixed as possible. Electronic endoscope can penetrate to the common SLR camera can not record the location of fixed traces of evidence, non-destructive testing difficult object provides a new method.