单片机的室内空气质量检测系统设计样本VIP专享

基于单片机气体质量检测系统设计 摘 要本论文讨论设计了一种用于公共场合及室内具备检测及超限报警功能室内空气质量检测系统。其设计方案基于 89C51 单片机，选取瑞士蒙巴波公司CH20/S-10 甲醛传感器和 MQ-5 气体传感器。系统将传感器输出 4~20mA 原则信号通过以 AD0832 为核心 A/D 转换电路调理后，经由单片机进行数据解决，最后由LCD 显示甲醛浓度值。文中详细简介了数据采集子系统、数据解决过程以及数据显示子系统和报警电路设计办法和过程。系统对于采样地点超过规定甲醛容许浓度和天然气规定浓度时采纳三极管驱动单音频报警电路提示监测人员。同步，操作人员对于详细报警点上限值可以通过单片机编程进行设立。 此外，该系统对浓度信号进行了信号补偿等解决，减少了测量误差，因而 ，具备较高测量精度，并且构造简朴，性能优良。本系统量程为 0-10ppm，精度为 0.039ppm 。核心词：甲醛检测/天然气检测/AT89C52 单片机ABSTRACTThis thesis design of a paper for public places and indoor testing and over-limit alarm functions with indoor air quality testing system. Its design is based on 89C51 single chip ， with the choice of MQ-5 gas sensors and CH20/S-10 formaldehyde sensor from Switzerland mengbabo company. Sensor system will output 4 ~ 20mA standard signal through the core ADC0832 for A / D conversion circuit after conditioning，by the single-chip microcomputer for data processing，at last display the formaldehyde concentration on the LCD . The article detailed the data acquisition subsystem，data processing and data display and alarm system circuit design method and process. When the sampling sites when the formaldehyde and Natural gas concentration exceeded，To the single-transistor drive circuit audio alarm will sound the alarm ， Testing staff to remind. At the same time ， The concentration of formaldehyde，Can be set through the single-chip programming. In addition ， the system signals a concentration compensation signal processing，a reduction of...