多路无线数据采集系统的设计

河北工业大学

硕士学位论文

多路无线数据采集系统的设计

姓名：吕增良

申请学位级别：硕士

专业：微电子学与固体电子学指导教师：孙以材

20061201

河北工业大学硕士学位论文

多路无线数据采集系统的设计

摘 要

文章介绍了基于nRF401芯片的多路无线数据采集系统的设计。系统采用主机-从机体系结构,主机可同时对多个采样点进行数据读取。为了保证数据传输的可靠性,必须对数据传输制定简单的通信协议,用户可以通过与系统进行交互来控制诸如采样频率之类的系统参数.

随着无线通信技术的发展，无线数据传输系统的应用领域不断扩大，基于射频技术的监控系统是无线数据传输在通信领域和自动化控制领域的重要应用的典型实例，根据工业控制传感器分布特点，开发了一个基于射频技术的嵌入式网络监控系统。主控芯片选择Philips公司的P89V51RD2,实现对无线射频模块数据传输的控制。射频模块的设计基于Nordic公司的nRF401射频收发芯片，通过在国际通用的ISM频段实现数据的短距离无线传输。

论文详细介绍了无线数据传输平台硬件模块的设计及其功能的实现，利用无线数据传输模块构建一个小型无线局域网络，该网络包括一个主控机，一个主机和多个终端，主机和终端之间通过串口进行数据通信，通过应用程序完成数据的处理。基于无线数据传输的嵌入式网络监控系统平台可以广泛的应用于工业控制领域，具有广泛的发展前景。

关键字：射频，无线传输，压力传感器，同步

多路无线数据采集系统的设计

THE DESIGN OF WIRELESS DATA COLLECTION SYSTEM WITH MULTIPLE CHANNELS

ABSTRACT

The design of a wireless data collection system based on IC nRF401 has been introduced. The system uses master-slave architecture, and the master can sample the data of multiple points at the same time. In order to insure the reliable transmission of the data, a protocol must be made to adjust the transmission between the master and slave. User can control the parameters of the system such as the sampling frequency by means of the communication with the system.

With the development of wireless communication, the application area of wireless data transmission system is expanding unceasingly. the monitoring system based on RF(Radio Frequency)technology is one of the great applications of wireless data transmission in wireless communication and automatic area. According to the distributed characteristics of the sensor in the control field, a embedded monitoring and control system based on the Radio Frequency (RF) are presented and developed in the thesis. The MCU selected in the system is P89V51RD2, that realizes the control of the RF module and data transmission. nRF401 produced by the Nordic company is chosen to fulfill the short distance wireless data transmission in ISM band which is used generally in the world.

A small network with the wireless module is introduced in this thesis, A host station and terminals is point to multi-point wireless data transmission. Data are exchanged between host and main controller through serial ports. The main controller disposes of data by a application software. This wireless communication platform based on the embedded monitoring network can be widely used in industrial control field, And it shows a splendid application in the future.

KEY WORDS:RadioFrequency,WirelessTransmission,PressureSensor, Synchronization