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Application of Air Quality Sensor in Underground Environment Monitoring System
Since prehistoric times, the use of underground space has appeared in human society in the form of natural caves. Caves, storages, and tombs are the primary forms of conscious use of underground space by human beings, which embodies the most basic function of underground space-shelter and storage. With the development of human society and the emergence of cities, underground space has begun to be used for water supply and drainage, underground municipal facilities, tunnels, subways and other functions. The use of underground space has changed from a conscious form to a purposeful and systematically planned form. Compared with the above-ground building space, the urban underground space will be a The big problem is also one of the problems that needs to be solved urgently in the process of modern city construction. Where are the air quality problems in underground spaces? Relevant research reports point out that there are serious air insufficiency and pollutants accumulation in underground space. There is natural wind on the ground and the air is easy to circulate. However, if the underground space does not have the necessary ventilation equipment, then the air can not circulate at all, and the harmful pollutants can only accumulate more and more. Indoor formaldehyde, carbon dioxide, and volatile organic compounds are not eliminated in time, and fresh air is not delivered in time. People will feel aversion soon after staying in this environment, and the body will naturally experience a series of symptoms such as dizziness, headache, chest tightness, hypoxia, etc. . In this regard, the air problem in the underground space not only needs to be improved, but also monitored. If you want to know whether the underground air quality has improved, and how much has been improved, it may be necessary to install a complete underground air quality monitoring system. Using visual data to intuitively verify the governance effect, and using historical data to surface the underground air quality status is the reassuring governance and monitoring method. The air quality sensor RS-MG111-N01-1 is an environmental monitoring device for the underground air monitoring system. It is a self-developed and produced air environment comprehensive index monitor. It can detect Humidity, air pressure, light, PM2.5, PM10, TVOC and other values, as well as oxygen (O2), carbon dioxide (CO2), carbon monoxide (CO), formaldehyde (CH2O) and other gas concentrations, are integrated with multiple elements and have very powerful functions. It basically covers all indicators that reflect air quality. It has the characteristics of high precision, high resolution and good stability. In the underground air quality monitoring system, the environmental monitoring host can support GPRS/4G, Ethernet, RS485 wired and other upload methods; from the product design, it is not only beautiful but also practical, and the equipment surface configuration With the LCD screen and buttons, the LCD screen displays real-time data and system time. In specific use, the user can directly modify the parameters through the buttons, which is more convenient than the equipment that needs to log in to the software to change. It also has the function of over-limit offline alarm, and automatically receives and stores air quality monitoring data (520,000 items can be stored). Once the received data exceeds the limit, the host will promptly remind the manager in the form of text messages and phone calls. If the data exceeds the limit, the LCD screen will also display the over-limit information in turn. The cloud platform can receive and store the monitoring data uploaded by the monitoring host, and display it on the interface; the user can view, download, and print historical data; when the value exceeds the limit, the cloud platform will prompt, SMS, The email informs the user that the value exceeds the limit, and at the same time sends an intelligent linkage command to the monitoring host to automatically start the relevant purification equipment to improve the air quality in the underground space. Which underground spaces can this system be applied to? 1. Urban transportation system (subway/tunnel/underground crossing passage)2, underground commercial complex3, underground municipal system (underground pipe gallery)4, underground parking Field, basement
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