Since entering the winter, fog frequently appears in the north, in the face of the increasingly urgent problem of haze, in addition to wearing a haze mask, what can we do? Recently, Xi'an University students invented a portable haze space distribution laser detector, real-time monitoring of the atmospheric environment. Not long ago, Xi'an Polytechnic graduate Dai Yuen and students invented a portable haze space distribution laser detector, real-time monitoring of air pollutants in the instrument, breaking the traditional environmental protection departments to measure atmospheric pollutants, the laser remote sensing Technology applied to the field of haze monitoring. It is reported that the instrument also won the first prize of Shaanxi Province College Students Extracurricular Academic Works Competition. Break the stereotypes with laser remote sensing monitoring At present, the relevant departments to monitor atmospheric pollutants are mainly used direct weighing, multi-point monitoring, artificial sampling and other methods, the above methods are only a single point of measurement. For example, direct weighing method, is to extract the same amount of air pollutants will stay on the filter membrane, directly weigh the weight, calculate the concentration of pollutants per unit volume. The multi-point monitoring needs to set up many instruments, not only time-consuming and laborious, but also not real-time. Because the atmosphere is mobile, changes in the location of sources, the spatial distribution of smog pollution, etc., have often taken place as workers sort out the data on the instrument. In fact, the values ​​of PM2.5 in each area of ​​the city vary, and the data is constantly changing, giving DICOM a creative idea to invent an instrument that can monitor atmospheric pollutants in real time. After nearly two years of hard work, he and his classmates completed the design and invention work. Detector to make up for the existing haze detector can not detect large defects, greatly expanded the detection range. This instrument night detection distance of 10-20km, daytime detection range of 5-8km. Detector overall system mainly by the laser launch system, optical receiving system, photoelectric detection system, data acquisition and processing system and three-dimensional scanning control system composed of five parts. On behalf of Chen Yuyu explained, this system mainly uses the two principles of light scattering and optical ranging. The laser emitting system emits pulsed laser light into the atmosphere, and the laser and atmospheric haze particles scatter, the backscattered echo signal is received by the optical receiving system, and then the optical signal is converted into an electrical signal by the photodetection system. Finally, the data Acquisition and processing system to use analog probe to complete the data acquisition and processing. Real-time monitoring, fog haze nowhere to escape Compared with the single-point measurement, this portable haze space distribution laser detector expands the detection range and real-time monitoring of the location of the pollution source, the degree of pollution, the way of spreading of the pollutants and the transmission route, and then the smog pollution Early warning of the emergence of the relevant departments to move forward the work mark, take response measures to alleviate the pollution problem. Make up for the existing haze detector can not detect large defects, greatly expanded the detection range. This instrument night detection distance of 10-20km, daytime detection range of 5-8km. Take Xi'an, an urban area of ​​about 860 square kilometers as an example. Experiments show that 4-6 sets of detectors can achieve the coverage detection in the entire Xi'an area, and the work efficiency has actually improved a lot. On behalf of Chen Yu-yu, this instrument can work with the existing particle monitoring equipment to work, not only to make up for the shortcomings of the existing instruments, with the work of the test results out of higher accuracy. They also look forward to working with the relevant departments and units and enterprises to contribute their efforts to pollution control and haze reduction. Young college students also know how to do their part and contribute to the society. 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