岸上缆道测验属远距离操作测验设备。为此,其起点距、水深、测点深、流速等测量数据,需通过各种渠道把它反映回来,使之达到半自动或自动控制。在这方面,我们利用机械和继电线路组合结构,实现了起点距、水深、测点深的半自动控制。各结构原理和工作过程分述如下: Shore cable test is a long-distance operation test equipment. To this end, its starting distance, water depth, measuring point depth, flow rate and other measurement data, it needs to be reflected through various channels back to semi-automatic or automatic control. In this regard, we use the combination of mechanical and relay line structure to achieve the semi-automatic control of starting point distance, water depth and measuring point depth. The structural principle and work process are as follows: