Design of wireless monitoring system for gas emergency repairing

Gas leakage accident occurs frequently due to the aging of pipeline and the third-party interference. To ensure safety during the gas pipeline emergency-repair, it's necessary to detect the gas concentration in the working place. In this paper, a WSN-based monitoring system for gas emergency repairing is proposed. The monitoring system is composed of the wireless nodes and the terminal software. The wireless nodes are used to collect gas concentration, temperature, humidity, wind speed and wind direction in real time, and transmit the data to the command terminal. The terminal software then store, upload the data, and can check those data as well as alarm. In order to provide feasible reference data for alert area and evacuation zone, this paper not only studies the diffusion model of gas leakage in the air, but also studies the impact of environmental meteorological condition on the gas diffusion. The system has been proven effective and reliable in real gas emergency-repair.