智能环境监测系统的设计_毕业论文.doc

智能环境监测系统的设计 Design on the intelligent system of monitoring environment 摘 要 系统主要由数据采集端和移动监控终端两部分组成。采用16位单片机SPCE061A为处理核心，在数据采集端，利用两片CD4067BE分别挂接16只DHT11温湿度传感器和16只光照强度传感器；采用10位ADC实现对环境声音的实时录制，加入OV7670摄像头进行实时拍照监控，最后把所采集到的数据帧通过NRF905无线传输模块传送到移动监控终端。在移动监控终端，通过NRF905接收数据，将处理后的环境参数数据进行显示，接收到的语音压缩编码通过10位DAC进行解码播放，通过按键切换进入全屏环境参数显示模式或全屏监控照片显示模式，并将接受到的环境参数、声音、照片存储到SD卡中。本文以SPCE061A超低功耗单片机为核心，设计了通用智能终端和智能温湿度传感器，重点介绍了该终端和传感器的任务、硬件、软件以及控制算法的设计与实现。硬件方面，介绍了系统各个部分的设计思想、原理电路以及，并给出了系统总硬件原理图；另外，为了实现系统的低成本和低功耗，在满足设计要求的前提下，尽可能选用了价格低廉和低功耗的元器件。软件方面，采用了时间触发的混合调度器模式设计，对系统各个任务进行了设计，并给出了系统软件低功耗设计方法。 关键词：SPCE061A；多节点；无线传输；HMI Abstract The system is designed for two parts of data acquisition terminal and mobile monitoring terminal. Its processing core is SPCE061A which is a 16 bits mcu. In the data acquisition terminal, 16 DHT11 of single bus temperature, humidity sensor and 16 light intensity sensor are hung on two CD4067BE. The environmental sound is recorded to coding and compression with 10 bits ADC which is built in the mcu at any time. Add OV7670 which is a camera module to monitor at anytime. ALL collected data is transmitted to the mobile monitoring terminal through NRF905 of wireless transmission module. In the mobile monitoring terminal, the data is received through NRF905.The environmental parameter data is displayed after dealing with and the compression coding of speech is decoded to play with 10 bits DAC.We can switch to full-screen environment parameter display mode or full-screen picture display mode with the keys. At last, the environmental parameter, sound and photos are stored to the SD card.Based on the SPCE061A ultra low power microcontroller as the core, a general intelligent terminal and intelligent temperature and humidity sensor design, focuses on the terminal and sensor task, hardware, software and the design of control algorithm and realization. In terms of hardware, introduces the various parts of the system design thought, the principle circuit and system, and the