Abstract: In recent years, more attention has been paid to the inspection of long and large diameter diversion tunnels with multiple curves in non-still water. Taking the No. 1 diversion tunnel of a hydropower station as an example, the technical research and application of independent designed unmanned cata⁃ maran with sonar system and high-definition camera system in flowing water to replace the inspection of diversion tunnel after water discharge are described in details, which can provide reference for similar projects.

independent designed unmanned catamaran, diversion tunnel, multi-beam echo sounding system, multi-beam 2D sonar

近年来，水电站建设过程中越来越重视对长距离、大直径、多弯道、非静水导流洞的检查工作。以某水电站1号导流洞为例，详细阐述了动水情况下自主设计无人双体船配合声呐系统和高清摄像系统等替代导流洞放空检查的技术研究和工程应用，可为类似工程提供参考。

自主设计无人双体船, 导流洞, 多波束测深系统, 多波束二维声呐