A system of collection and control for gas information based on GPRS is designed for the purpose of gas safe in this paper. The design of data acquisition and control system hardware and software, design of network security data transmission and the software design of the control center are researched mainly by the paper. The remote monitoring and control to gas pipelines and gas storage facilities at places such as gas leakage can be realized by using the system. The innovation is the real-time information gathering of gas can be implanted.

In order to solve such problems of the mine cable gas monitoring system as high costs, inconvenient maintenance, hindering wiring and unmovable monitoring information points, a mine safety helmet is designed, based on wireless sensors networks, which studies the hardware design, gas concentration calculations and its dynamic compensation algorithm, as well as the experimental design of gas monitoring system in mine safety helmet so as to ensure the correct calculation of the gas concentration. The innovative point of this essay is the combination of the ordinary LED cap lamp and the wireless sensors networks, which ensures a real-time, dynamic collection of the information of the gas concentration around the workers.

To solve the problem of high false alarm rate and low positioning accuracy in the gas leak location detection, a new method is designed, in which wavelet transform is used to extract gas leak negative pressure wave signal, the gas leaks and positioning can be detected by using the method of negative pressure wave combined with flow balance. An algorithm of extracting negative pressure signal through wavelet transform is proposed and a method of negative pressure signal-flow rate detecting and positioning is provided. A negative pressure wave-flow testing gas pipeline leak system based on wavelet transform is designed. The positioning accuracy of the system reaches ± 1% of pipe length, and the false alarm rate is reduced.