地铁隧道沉降变形监测系统视频调试方案设计

分析地铁隧道沉降变形自动监测系统现场调试需求,根据系统结构及工作原理,设计了一种基于嵌入式Linux平台、B/S模式的调试方案,用于设置系统初始化参数和调节图像传感器。该方案在linux平台上构建嵌入式web服务器Apache httpd,按照V4L2规范采集监测摄像头的图像并压缩,经httpd推送至浏览器不断刷新显示,形成视频效果。用户通过网页设置系统初始化参数、观察摄像头视频,以调节摄像头的安装角度、光圈及曝光度等,获得监测目标的理想拍摄位置和图像输出,完成系统现场安装调试。

Design of Video Debugging Solution for Metro Tunnel Settlement Deformation Monitoring System

This article firstly describes key principles of a new tunnel settlement auto-monitoring system using intelligent image sensor network to real-timely monitor tunnel settlement, predict settlement trend and issue safety warnings. On analyzing the installation and debugging requirement of the settlement auto-monitoring system, the article then designs a B/S mode video debugging solution based on the embedded platform of Linux for parameter initialization and image sensor network adjusting of the system. The subsystem comprehensively applies Apache web server httpd, V4L2 video capture and transmission and CGI technology to capture target video information of LED light sources to debug the position, aperture, exposure and other features of the image sensors to make sure that they are perfectly installed and work in desired status so that the whole image sensor network plays its role.