Portable methanealarm device used more and more with the increasing emphasis of mine safety.
随着对煤矿安全的日益重视，矿用便携式甲烷报警仪的使用越来越多。
2
This article introduces a methanealarm with PIC16F873 MCU manufactured by Microchip Technology Company in U. S. a, which can detect the methane contents in air.
介绍了采用美国微芯公司生产的PIC16 F 873微处理器等器件来设计甲烷检测报警仪，实现了对空气中的甲烷含量的检测。
3
A new conception for new type cap lamps using lithium batteries and LED cold light as substitutes, with the functions of methane - alarm and personnel information tracking is put forward.