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The wireless sensor network technology combined with the gas sensors of RAE systems provides a set of wireless environmental monitoring system for the management committee of the development zone that can measure and control the environmental pollution indicators of the chemical park in real time. The system has greatly improved the management committee’s supervision and management of safe production in the chemical industrial zone. It can better quickly identify the dangerous areas of sudden accidents in the chemical park, detect chemical leakage accidents in public areas in time, provide safety guarantee for emergency rescuers, and provide a strong basis for post-event investigation and analysis of accident responsibilities.
1. Demand analysis
Ningbo Daxie Island Development Zone, with an area of more than 30 square kilometers, has a national-level chemical industry park, and more than 8 of the world’s top 500 chemical companies have settled in it. The Development Zone Management Committee hopes to establish an environmental monitoring system that can predict and stop dangers before they occur, quickly respond to accidents after they occur, and conduct real-time inspections of the entire park. The wireless sensor network technology combined with the gas sensors of RAE systems provides a set of wireless environmental monitoring system for the management committee of the development zone that can measure and control the environmental pollution indicators of the chemical park in real time. The system has greatly improved the management committee’s supervision and management of safe production in the chemical industrial zone. It can better quickly identify the dangerous areas of sudden accidents in the chemical park, detect chemical leakage accidents in public areas in time, provide safety guarantee for emergency rescuers, and provide a strong basis for post-event investigation and analysis of accident responsibilities.
2. System introduction
The system consists of three parts: wireless sensor monitoring terminal equipment, relay station and monitoring software. The wireless sensor monitoring terminal sends the monitored real-time data and GPS information to the relay station, and the relay station sends the data to the data monitoring center.
(1) The wireless sensor monitoring terminal can install one to five sensors, one JRc1 wireless module, GPS and battery pack. The sensor mainly detects the data of gas concentration in the air, and JRc1 is responsible for processing these data and transmitting it to the middle base station or monitoring center through Ad-hoc intelligent network technology.
JRc1 wireless modem with Ad-hoc network function. Ad-hoc network is a wireless intelligent network. This technology allows direct communication between network nodes using wireless transceivers without requiring a fixed network platform. This feature automatically extends network coverage, solving transmission problems in non-line-of-sight or harsh industrial environments. When the network topology changes, each node in the Ad-hoc network can automatically form a network, automatically find routes, and automatically rebuild. All algorithms are integrated in the firmware inside the Modem, which makes the whole process without manual intervention, making the network more intelligent and easier to build and apply.
(2) The intelligent mid-base station is a wireless data routing and relay station integrating JRc1 wireless transmission module and solar power supply. It can cover an area with a radius of 3-5 kilometers. Based on the intelligent Ad-hoc network protocol, the base station does not need data cables and power lines. So the installation is very convenient.
(3) Monitoring software is a system designed for emergency response to hazardous chemical accidents or leakage at specific locations. Combining complex mathematical calculation rules with weather conditions and specific location data (including location information, nature of accident, nature of hazardous chemical sources, diffusion or leakage, topography, etc.) Influence. Professional and technical-level application models are used to analyze analysis models such as explosion and leakage of hazardous substances. This application module has a database of more than 700 chemical substances, a simulation scenario reproduction program. The program enables detailed and general analysis of weather and hazardous chemical sources. Through this system, it is possible to output reports, graphs, isopoints, important point maps and analysis of the overall impact of the accident on hazardous chemical substances.
3. Summary
The company’s wireless sensor network technology has greatly improved the environmental detection and emergency handling capabilities of the Daxie Chemical Industrial Zone of the Management Committee. Wireless sensor network technology not only facilitates installation and deployment of each node, but also eliminates the cumbersome process of wired access and reduces costs. JRc series industrial wireless modems can provide a low-cost solution for high performance and reliable data transmission for many industrial applications.
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