China's successful research and development of haze online monitor

The haze brings a lot of inconvenience to people, and it also jeopardizes people's health. Monitoring and management are urgently needed. Recently, Sichuan Dinglin Information Technology Co., Ltd. has successfully developed a haze on-line monitor. At present, computers in the Industrial Park of the Institute of Optics and Electronics of the Chinese Academy of Sciences are continuously computing the data they collect.

Yang Ning, head of the company, said that the current environmental protection department used the air quality index monitoring system to forecast pollution, mainly focused on monitoring six kinds of polluting gases such as PM10, PM2.5, etc., and the on-line monitoring device for smog through real-time visibility, humidity, etc. The data is monitored on-line for haze, and overall monitoring of various pollutant gases and suspended matter in the air. "The two monitoring methods are different and can effectively complement each other."

"The biggest benefit of overall monitoring is that it not only reflects the severity of haze, but also locates the haze pollution distribution and sources of pollution." According to the chief engineer of the company, Gan Zhi, the severity of haze is directly proportional to the concentration of pollutants in the atmosphere. The particle concentration is proportional to the atmospheric extinction coefficient. The haze on-line monitor is developed based on the transmissive principle. By monitoring the extinction coefficient of the atmosphere, including the scattering and absorption effects, the smog severity can be calculated and finally reflect the total pollutant concentration level. At the same time, when there are multiple sources of pollution in an area, the haze on-line monitor can locate the distribution and location of pollution sources and effectively monitor irregular discharges. (Source: China Journal of Science)