An automatic protection method and system based on dangerous gas monitoring and alarming

Abstract

The invention discloses an automatic protection method and system based on dangerous gas monitoring and alarming. A nano-material semiconductor sensor is used to monitor the methane gas concentration near the gas pipeline and the gas source in real time, and a temperature and humidity sensor is used to monitor the temperature and humidity near the gas pipeline in real time; The microprocessor compares the methane gas concentration value with the preset warning concentration threshold and the minimum explosion concentration threshold. If the time is higher than the warning concentration threshold for more than 3S, a first-level warning signal will be generated. If the time is higher than the minimum explosion concentration threshold for more than 3S A secondary early warning signal is generated, and the microprocessor sends control signals to the fan and solenoid valve at the same time; further regulating the fan and solenoid valve, on the one hand, avoids the waste of manpower and material resources caused by false alarms, and on the other hand, improves the accuracy of leak detection. It is convenient for maintenance personnel to accurately and efficiently find out the leak source for maintenance, which improves the safety of methane gas monitoring.

Description

technical field [0001] The invention relates to the technical field of dangerous gas monitoring, in particular to an automatic protection method and system based on dangerous gas monitoring and alarming. Background technique [0002] With the application of various gases, a variety of toxic and harmful gases are produced in residential quarters and factory areas, posing a great threat to human health and safety. Various gas detection technologies emerged as the times require, such as coal gas liquefied gas detection and alarm, smoke detection and alarm, especially the artificial olfactory system and the artificial olfactory device of chemical nanomaterial semiconductor sensor array, which have attracted widespread attention and research. Gases detected by nanomaterial semiconductor sensors include methane, ethanol, xylene, carbon dioxide, carbon monoxide, carbon dioxide, etc. There are also many studies and reports on methods and systems for monitoring and alarming dangerou...

AI Technical Summary

Problems solved by technology

However, after research, it is found that there are the following technical problems: (1) lack of real-time detection of the concentration value and threshold comparison method, the timeliness and accuracy of monitoring and alarm cannot be realized through multiple sensors and monitoring devices, lack of anti-false alarm function and Re-inspection methods cannot quickly find the source of methane gas leakage for easy maintenance, which reduces safety and wastes manpower and material resources; (2) Multiple opening and closing of electrical components such as fans and solenoid valves wastes electric energy, lacking reasonable control methods, and at the same time The applicable monitoring environment is limited and the scope of application is narrow; (3) It is not suitable for environments with multiple gas sources, and it is impossible to quickly find the leaking gas source for leak re-inspection and maintenance

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