机动车雷达测速仪现场检测系统设计
毕业论文关键词 雷达测速仪检定装置 多普勒 ARM 直接数字频率合成器 功率计/频率计 转台
Title Design and Implementation of Field Test Device for Vehicle Radar Velocity Measuring System
Abstract While the traffic becomes faster and more convenient, traffic problems such as speeding get more attention. To ensure the justice of the law enforcement, it is necessary to test the performance of velocity-measuring system. However, the test followed the regulation has much shortage like affecting traffic, measuring inaccurately and tediously. The paper presents a design of a new test device for radar velometer to test conveniently, which can get the azimuth and elevation angle information of the radar velometer in detection region, simulate the radar echo, and simulate the radial Doppler frequency of the given speed target. The paper makes an implementation scheme of test device, based on the ARM panel, fulfilling the basic function by controlling the DDS module, turntable and power/frequency meter.
Keywords test device for radar velocity-measuring system, Doppler, ARM, direct signal synthesizer，power/frequency meter, turntable
目次
1 绪论 1
1.1 机动车雷达测速仪检定的意义 1
1.2 测速仪检定规程 1
1.3 按规程检定的问题及检定装置现况 2
1.4 本课题目标和任务 3
2 系统工作原理与实现方案 4
2.1 测速雷达的工作原理 4
2.2 测速雷达检定装置工作原理 4
2.3 系统组成 5
2.4 工作流程 6
2.5 实现方案 7
3 基于 ARM 的检定装置软件设计 10
3.1 硬件平台 10
3.2 ARM linux 相关开发软件 11
3.3 ARM 板 SPI 通信 14
3.4 UART 串口协议 15
3.5 串行接口控制转台程序设计 16
3.6 串行接口控制功率计/频率计程序设计 19
3.7 SPI 接口控制DDS 模块程序设计 22
3.8 基于QT 的检定装置界面设计 28
3.9 寻找功率最大值功能实现 31
3.10 模拟速度目标功能实现 34
3.11 当前点自动模拟速度目标功能实现 35
4 检定装置功能测试 37
4.1 寻找功率最大值功能测试 37
4.2 模拟速度目标功能测试 39