基于激光雷达技术的粉尘污染源监测

针对粉尘污染点源数量多、夜间偷排偷放监测难等问题,环保监测迫切需要发展新一代遥感监测技术,为环境保护提供技术支撑。激光雷达具有远距离、全天时监测的优势,可实现对污染源的客观、全天时监测。为了验证激光雷达主动遥感技术监测粉尘污染源排放的可行性,在河北省组织了一次粉尘污染源的Lidar监测实验,在进行距离校正的基础上,发展了Lidar点源污染监测指数因子方法。结果表明:烟尘排放浓度与Lidar指数因子具有较好的一致性,校正决定系数可达0.94。在稳定排污的情况下研究Lidar指数因子的限值,结果显示,将指数因子的限值设为2.3时,与在线监测的一致性可以达到99%以上。

Study on the Monitoring of Dust Pollution Sources Using Lidar

To address the large number of point pollution sources and shortage of night monitoring means,there is a pressing need to provide remote sensing monitoring technology supporting for environment protection. With the advantage of long range detection and the capability of working at all time, lidar can provide an objective, continuous and real-time monitoring for a point pollution source. An excess emission experiment was carried out in Hebei province to confirm the feasibility of lidar using in point pollution source monitoring. A lidar index factor method was submitted based on the distance correction. And result showed that there was a positive relationship between the dust emission concentration measured by on-line monitoring instrument and lidar index factor (r=0.94). Furthermore, with the threshold of 2.3, the detection accuracy up to 99% was achieved using lidar index factor under a stable pollution emission.