基于红外吸收原理的无线瓦斯巡检仪

针对传统光学瓦斯检定仪存在的量程范围小、测量精度低、不具备数据传输功能等问题，根据红外吸收气体检测原理研制一种无线接入式瓦斯巡检仪。该仪器硬件结构由红外瓦斯传感器、控制单元、LCD显示器、声光报警电路、功能键盘电路、时钟电路、无线通信模块和电源模块等部分组成，无线通信采用半双工模式的无线通信协议。实验结果表明，该瓦斯检巡仪量程为0～10％，检测精度为0．0l％，井下通信距离可达120m。它提高了瓦斯检测的量程和准确性，实现了数据的无线传送，为瓦斯巡检员远程作业定位管理系统的构建奠定了基础。

Wireless gas detector design based on infrared absorption principle

This paper is aimed at an alternative to the conventional optical gas detector which suffers from smaller scale range, lower accuracy, and absence of data transmission function by developing a wire- less access-type gas detector depending on infrared absorption gas detection principle. This detector＇ s hardware consists of infrared gas sensor, control unit, LCD, sound and light alarm circuit, keyboard cir- cuit, clock circuit, wireless communication module, and power module. Wireless communication builds on half-duplex mode wireless communication protocol. The results show that the detector boasts a range from 0 to 10%, a detection accuracy of 0.01%, and an underground communication distance of up to 120 m. This gas detector, capable of a longer range and a gTeater accuracy of gas detection and the wire- less data transmission, provides a basis for developing the remote gas detection and location management system.