(完整版)多传感器数据采集与传输电路设计毕业设计

天津职业技术师范大学Tianjin University of Technology and Education

毕业设计

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二〇一年月

天津职业技术师范大学本科生毕业设计

多传感器数据采集与传输电路设计Design of A Circuit for Multiple Sensors Data Acquisiton and Transmission

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学院：自动化与电气工程学院

201 年0 月

摘要

在工业、农业和生活中，对温度和湿度数据的监测具有非常重要的实际应用。人们生活水平的改善和科技的不断进步，无论是农业还是工业或日常生活中对温度和湿度数据监测都有越来越高的要求。本课题的设计基础是基于nRF24L01通信模块的无线多路温湿度数据采集与传输电路系统的设计，主要应用于特殊环境或工农业现场的温湿度采集与监测。系统采用无线通信技术和无线温湿度传感器采集技术，利用无线数据的通信技术能够在很大程度上降低空间布线所带来的施工难度和施工成本。本系统选用STM32单片机作为主控芯片，系统包括无线数据通信模块，DHT11温湿度传感器，LCD液晶显示模块，蜂鸣语音报警模块，以及模拟继电器LED指示等外围电路。

系统由主机-从机-从机的结构体系组成，主机系统可同时对多个传感采样节点进行数据的汇集。传感器节点通过从机将实时温湿度数据采集到单片机，经过数据运算再通过nRF24L01模块发送给主机，主机接

收到从机的数据之后需要对数据进行测量和处理，与程序设定的上限值进行比对，判断监测传感节点的参数是否达到预警值，并对报警电路和模拟继电器模组进行相应的控制。最后经过实际的软硬件测试之后，本作品实现了STM32单片机采集多节点温湿度传感器数据，通过nRF24L01模块及特殊通讯协议进行一定距离的传输，最后在主机的LCD12864液晶上显示出来的模型。

关键词：单片机；nRF24L01；传感器；主机；LCD液晶屏

ABSTRACT

In the industry, agriculture and life, the monitoring of the temperature and humidity has a very important practical application.. The improvement of people's living standards and the continuous improvement of technology, whether it is the agricultural or industrial or daily life of the temperature and humidity data monitoring are increasingly high requirements. The basis for the design of the subject is based on nRF24L01 communication module of multi-channel wireless temperature and humidity data acquisition and transmission circuit system design, mainly used in special environment or agriculture and industry field of temperature and humidity data acquisition and monitoring. System uses wireless communication technology and wireless temperature and humidity sensor technology, the wireless data communication technology can reduce the wiring space brought about by the construction difficulty and the construction cost in a great extent. The system use STM32 microcontroller as the main control chip. The system comprises a wireless data communication module, temperature and humidity sensor DHT11, LCD liquid crystal display module, buzzer voice alarm module, and LED indicator relay simulation and other peripheral circuits.

The system consists of a host computer architecture, and the host system can collect data from multiple sensing nodes simultaneously.. Sensor nodes through from the machine will be real-time temperature and humidity data acquisition to the microcontroller, after data processing by nRF24L01 module to send to the host host receives the

need to deal with the data measured from the data on the machine, and procedures set upper limit value for comparison, judgment parameters monitoring sensor node whether it reaches the warning value and the alarm circuit and analog relay module were corresponding control. Finally after the actual hardware and software testing, this work realized STM32 MCU acquisition multi node temperature and humidity sensor data, transmits a certain distance through the nRF24L01 module and special communication protocol, finally in the host LCD12864 liquid crystal display model.

Key Words：CPU；nRF24L01；Sensor；Host；LCD screen