公开(公告)号：US4913558A

公开(公告)日：1990-04-03

申请号：US259405

申请日：1988-10-18

申请人： Lennart Wettervik ,  Bo Ericsson

发明人： Lennart Wettervik ,  Bo Ericsson

IPC分类号： G01M3/02 ,  F17D5/02 ,  G01M20060101 ,  G01M3/00 ,  G01M3/38

CPC分类号： G01M3/38 ,  G01M3/005

摘要： Defects in an underground channel, such as a sewer, are detected by an infrared scanning device (preferably an infrared video camera) moved internally along the channel. The scanning device senses temperature deviations which mark defects in the channel, as, for example, deviations due to the inflow of cool extraneous water into a sewer. The scanning device is in communication with an above-ground central unit which processes the scanning device output and displays and/or records thermal representations of the defect. The central unit also monitors the location (distance travelled) of the scanning device so that the locations of defects may be determined.

摘要翻译： 通过在通道内部移动的红外线扫描装置（优选为红外线摄像机）来检测地下通道（例如下水道）中的缺陷。 扫描装置感测标记通道中的缺陷的温度偏差，例如由于冷却的外来水流入下水道而引起的偏差。 扫描装置与处理扫描装置输出的地面中央单元通信，并显示和/或记录缺陷的热表示。 中央单元还监视扫描装置的位置（行驶距离），以便可以确定缺陷的位置。