摘 要 瓦斯巡回检查是防止瓦斯事故的一项重要措施。然而多年来，瓦斯巡检一直存在数据手工记录、瓦检员人身安全难以保证、历史数据查询麻烦、不能根据历史记录直接进行分析等问题。 本文从煤矿井下环境的特殊性及瓦斯采集工作的安全性出发，提出了一种基于SDR技术的井下瓦斯采集系统，该系统可以解决巡检人员的人身安全问题，巡检人员不必亲自到达采集点就能采集到信息，更好地避免瓦斯事故的出现。 通过对目前较为常见的几种SDR无线通信技术进行工作频率、功耗、传输速率和网络设备连接数等方面介绍与比较后，根据井下瓦斯采集的功能需求，提出了一种基于ZigBee技术的煤矿井下井下瓦斯采集系统，来实现井下瓦斯信息采集。该装置基于ARM硬件平台，嵌入式linux软件平台和Zigbee技术，对系统进行了方案设计与论证，并在硬件方面设计并实现了瓦斯传感器电路、无线模块外围电路以及ARM7的核心板电路；软件方面实现了bootloader的移植、uClinux的移植和瓦斯采集发送程序。最后对设计实现的瓦斯采集前端进行了测试。模拟巷道测试结果表明该系统可在30米范围内实现9600bit/s的数据采集与传输，基本达到设计要求。

ABSTRACT Patrolling and checking is a key method to prevent gas accidents but this method has been facing many problems for years: there is too much manual data entry work and it is difficult to ensure patrolman’s safety; it is inconvenient to search for histories and not mention to do some analysis against raw data and records. In the perspective of safety gas collecting from an unusual environment of underground mines, this paper proposed a SDR based underground gas collecting system which enable patrolman to do the data collecting without going to the spot, to assure the safety of patrolman and a better prevention of gas accidents. Through comparing the more common several kinds of SDR wireless communication technology in the operating frequency, the power loss, the transmission speed and the number of network equipment connection, by the demand of collecting coal gas, one coal gas concentration collection system based on the ZigBee technology is introduced to realize the information collection of coal gas. Based on the ARM hardware platform, the embedded linux software platform and the Zigbee technology, the project design and proof has been brought forward. In the hardware aspect, the gas sensor circuit, the wireless module peripheral circuit as well as the ARM7 nuclear core circuit have been designed and realized. The bootloader transplant, the uClinux transplant as well as the program of date acquisition and transmission have been realized in the software aspect. Finally, the design and implementation of the gas collection was tested. The result tested in the simulation tunnel indicates that this system may realize the 9600bit/s data collection and transmission in 30 meters scopes, achieves the design requirements basically.