基于ARM的無線數據采集系統(tǒng)的設計

摘 要

無線數據采集系統(tǒng)，不僅能很好地滿足各行業(yè)信息采集的需求，而且也為各行業(yè)提高了生產和工作效率，減少建設成本和運營成本，創(chuàng)造了很好的經濟效益和社會效益，符合經濟建設和社會發(fā)展的要求。在信息采集系統(tǒng)中，采用無線方式進行信息的傳輸，可避免布線的麻煩，有效擴展控制距離和范圍。
本課題研究的是對溫度的采集和無線傳輸。溫度信息的采集與處理是信息采集與處理領域經常要解決的問題，應用廣泛。本課題使用ARM7開發(fā)板、DS18B20溫度傳感器和nRF905無線模塊搭建無線采集的硬件系統(tǒng)。ARM7作為控制核心，控制DS18B20和nRF905無線模塊的工作狀態(tài)，以實現對整個系統(tǒng)的控制。DS18B20采集現場的溫度，傳輸給ARM7處理，nRF905使用433MHz的無線頻段將數據發(fā)射出去。系統(tǒng)的軟件設計使用ARM開發(fā)環(huán)境ADS1.2，并通過Jtag口進行在線仿真調試。本論文介紹了系統(tǒng)整體方案的設計、硬件設計、軟件設計。最終整個系統(tǒng)實現對溫度的現場采集，然后經過無線傳輸，在電腦上實時顯示。     

關鍵詞：無線采集  ARM7  DS18B20  nRF905
 
Abstract

Wireless data acquisition system can not only satisfy the needs of various sectors of information collection, but also improve production and working efficiency. It reduces construction costs and operating costs and creates a good economic benefit and social benefit, in line with economic construction and social development. In the information acquisition system, transmitting the data wirelessly can avoid the wiring problems and expanding the control distance.
The project researches how to acquire temperature and transmit the temperature wirelessly. The acquisition and process of temperature information is a common problem in the information acquisition field and has wide application. ARM7 development board, DS18B20 the temperature sensor and nRF905 the wireless module are used to build the hardware foundation for wireless acquisition system in this project. As a control unit, ARM7 controls the working status of DS18B20 and nRF905 the wireless module in order to control the whole system. DS18B20 collects on-site temperature and transmits the temperature to the ARM7 for processing. And nRF905 will transmit the temperature out by using 433MHz radio frequency band. In the system, software design is based on the ARM development environment ADS1.2, and online simulation debugging through Jtag port . This paper introduces the overall system solution design, hardware design and software design. Eventually the whole system will achieve the result of on-site temperature acquisition, wireless transmission and real-time display on the computer.

Key words:Wireless Acquisition  ARM7  DS18B20  nRF905
 
目  錄

摘要 I
Abstract II
緒論 1
1  系統(tǒng)設計方案 3
1.1  系統(tǒng)研究 3
1.2  系統(tǒng)整體方案 3
1.2.1  控制核心 3
1.2.2  溫度采集 4
1.2.3  無線收發(fā) 4
2  硬件設計 5
2.1  溫度采集模塊設計 5
2.2  無線收發(fā)模塊設計 6
3  軟件設計 9
3.1  系統(tǒng)軟件設計整體思路 9
3.2  S3C44B0初始化 9
3.3  溫度采集子程序設計 10
3.3.1  DS18B20復位函數 10
3.3.2  測量溫度函數 11
3.3.3  讀取溫度函數 11
3.4  無線收發(fā)子程序設計 12
3.4.1  初始化nRF905函數 13
3.4.2  SPI讀寫操作函數 13
3.4.3  配置nRF905函數 15
3.4.4  發(fā)送數據函數 16
3.4.5  接收數據函數 17
3.5  系統(tǒng)調試 18
3.6  結果分析 19
結論 20
致謝 21
參考文獻 22
附錄一S3C44B0核心板原理圖 23