目 录
目 录 .......................................................................7
1 绪论 .......................................................................1
1.1 本课题的研究目的和意义 ..................................................1
1.2 交通量数据采集系统国内外发展现状 ........................................2
1.2.1 国外发展现状 ........................................................2
1.2.2 国内发展现状 ........................................................3
1.2.3 常用车辆检测传感器 ..................................................3
1.3 本课题的研究内容 ........................................................5
2．过车传感器相关技术 ........................................................6
2.1 嵌入式技术 ..............................................................6
2.2 磁阻传感器工作原理 ......................................................6
2.2.1 磁阻效应............................................................7
2.1.2 磁阻传感器在车辆检测中应用..........................................7
2.3 ZIGBEE 网络技术 ..........................................................9
2.3.1 Zigbee 网络各层帧结构 ..............................................10
2.3.3 ZigBee 技术的原语 ..................................................13
2.3.4 ZigBee 网络拓扑结构 ................................................14
2.3.5 Zigbee 网络组建 ....................................................15
2.5 本章小结 ...............................................................15
3. 过车传感器硬件系统设计 ...................................................17
3.1 系统设计原则和硬件框架 .................................................17
3.2 硬件设备的选择 .........................................................18
3.2.1 磁阻传感器 .........................................................18
3.2.2 A/D 转换器 .........................................................19
3.2.3 无线通信芯片 CC2430 ................................................20
3.2.4 电源模块...........................................................22
3.3 过车传感器相关的通信 ...................................................22
3.4 本章小结 ...............................................................25
4. 过车传感器的硬件电路和驱动开发 ...........................................26
4.1 传感器电路 .............................................................26
4.1.1 CPU 电路 ...........................................................26
4.1.2 A/D 转换电路 .......................................................27
4.1.3 数据存储器电路.....................................................27
4.1.4 电源电路...........................................................27
4.2 驱动程序的开发 .........................................................28
4.3 过车传感器的驱动程序 ...................................................29
4.3.1 数据存储器的操作函数...............................................29
