说明：  以传感器技术和A/D 转换技术作为系统设计的基础，实现瓦斯气体浓度信息的采集以及信号的 转换。设计了系统硬件电路，给出相关测试结果，该系统硬件电路简单，控制可靠。
(With sensor technology and A/D converter technology as the basis for system design to achieve gas gas concentration information collection and signal conversion. Hardware circuit design of the system are given the relevant test results, the system hardware circuit is simple, and reliable control.)