基于CAN总线分布式矿井温湿度监测系统研发

摘要

针对煤矿井下监控现场防尘、防潮、防水、电网波动大、传输距离远及经常增加监测点的要求,对CAN总线接口技术进行研究,设计出以AT89S52为控制核心,基于CAN总线的矿井内温湿度监测系统。详细分析了SJA1000内置CAN控制器的工作原理,设计了CAN总线接口电路。在温湿度测量中,采用SHT11作为温湿度传感器,实现了温度0～120℃和相对湿度0～100%的高精度测量。试验结果表明,该监测系统性能稳定,工作可靠,具有高精度、示值稳定性好等特点。%According to the dust control,moisture prevention,water proof,high wave of the electric network,long transportation distance and the monitoring and measuring point increasing requirement in the underground mine monitoring and control site,a study was conducted on the connection technology of the CAN bus.Based on the AT89S52 as the control key and based on the CAN bus,the temperature and humidity monitoring and measuring system of the underground mine was designed.The working principle of the CAN controller built in SJA1000 was analyzed in detail and the interface circuit of the CAN bus was designed.In the temperature and humidity measuring,the SHT11 was applied as the temperature and humidity sensor and the high accurate measurements could be done on the temperature within 0~120 ℃ and the relative humidity within 0～100%.The test results showed that the monitoring and measuring system could have stable performances,reliable operation,high accuracy,good stable data showed and other features.