CONSTRUCTION JOBSITE MONITORING WITH MULTIPLE VIDEO CAMERAS

该合作研发（CR&D）项目的主要目标是创建一个新的基于视觉的原型，可以帮助魁北克水电监控施工现场的劳动力和设备资源的使用。目前，Hydro-Québec主要依靠现场检查员的定期观察来手动执行工地监测。并非所有建筑工程都采用这种人手监察的做法。此外，它无法始终监控劳动力和设备资源。考虑到这些限制，魁北克水电公司计划在施工现场安装多个摄像机，以方便现场检查员的监测工作。在这个CR&D项目中创建的原型预计将自动检索劳动力和设备信息，从这些摄像机拍摄的工地视频。它首先使用视频流来生成施工现场的3D点云。然后，沿着时间轴检测和跟踪点云中的建筑工人和设备。基于检测和跟踪结果，对工作现场的劳动力和设备资源的工作时间进行统计分析，并将其与工作现场工作区域相关联。通过这种方式，魁北克水电公司对每个工作区的实际劳动力和设备成本有了初步的了解，以便发现潜在的成本超支。原型有两个主要的好处。首先，它将大大减少目前人工监测做法所需的人力和资金。此外，视频流监控可以帮助魁北克水电公司尽早发现设备和劳动力利用方面的潜在项目延迟。

The main objective of this Collaborative Research and Development (CR&D) project is to create a novel vision-based prototype that could help Hydro-Québec monitor the use of labor and equipment resources at construction jobsites. Currently, Hydro-Québec mainly relies on the regular observations from field inspectors to manually perform jobsite monitoring. This manual monitoring practice is not available in all construction projects. Also, it could not monitor the labor and equipment resources all the time. Considering these limitations, Hydro-Québec plans to install multiple video cameras at the jobsites to facilitate the monitoring work of the field inspectors. The prototype created in this CR&D project is expected to automatically retrieve the labor and equipment information from the jobsite videos captured by these cameras. It first uses the video streams to generate the 3D point cloud of the jobsite. Then, construction workers and equipment in the point cloud are detected and tracked along the timeline. Based on the detection and tracking results, the working hours of the labor and equipment resources at the jobsite are statistically analyzed and associated with the jobsite work zones. This way, Hydro-Québec has a preliminary idea about the actual labor and equipment costs incurred in each work zone for the sake of detecting potential cost overruns. There are two major benefits associated with the prototype. First, it will significantly reduce the manpower and money required in the current manual monitoring practice. In addition, the monitoring with video streams could help Hydro-Québec detect potential project delays in terms of equipment and labor utilization as early as possible.