红外瓦斯监控系统的研究与设计

In this paper, the main component of mine gas methane is used as a research sample. A gas detecting system is achieved using non-dispersive infrared techniques which are based on the fact that many gases have unique infrared absorption signatures in the specifically region. The system will give an alarm to people when it is dangerous, so the explosive accident caused by gas in mine can be avoided.The article expatiates on the infrared absorption theory, the basic theory of infrared detection of methane and the structure of the methane detection instrument of infrared. Finally the PIC microcontroller completed the data collection, processing, data display and use CAN-bus to transfer. The system is together through the MCU, so that the whole system greatly reduced power consumption, size miniaturization. The research of the paper is useful for the design of else gas monitoring such as carbon monoxide, carbon dioxide and sulfur dioxide.