Compared with the common seam track system, this article introduces the working principle of optical sensor with structured light.
对几种常见的焊缝跟踪系统进行比较，着重介绍了结构光式视觉传感器的工作原理。
2
The ultrasonic sensor and the working principle in the seam tracking are explained.
介绍了超声波传感器及其焊缝跟踪工作原理。
3
Based on the analysis of gas source at the working face with "three-soft" unsteady coal seam, the authors introduce the principle and method of gas suction by roof-rock drilling.