汽车电子技术毕业论文---车辆限速装置

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1、 I 摘摘 要要 设计一种智能限速装置，利用速度传感器将转变成的电压信号输送给 ECU （Electronic Control Unit），来控制速度，速度达到规定值时切断电路达到限速的 目的。本文介绍了限速装置的工作原理，详细讲述了系统的组成、原理和测试方 法。系统采用硬件兼软件对测量过程及测量结果进行处理。与传统的限速装置相 比，此限速器具有结构简单、新颖、易于实现的特点。实验证明在整个调速范围 内都取得了良好的效果，系统具有良好的稳态精度及动态响应性能，同时也提高 了限速装置的整体性能。 该系统的目的在于自动限制汽车的运行速度.它能根据道路状况的不同,给出 对应不同的限速值; 通过对汽车

2、当前速度的测量,并与设定的限速值相比较.当大 于设定限速值时,使油门自动关小,由于这是一个负反馈控制过程,能使汽车的运 行速度限制在限速值附近. 限速值是由交通部门根据路况设置的,进入某种路况时将会自动地改变限速 值.从而使超速行驶的可能性大大减少，交通事故也明显下降。 关键词：数据采集；控制装置；霍尔式传感器 II Abstract One kind of intelligent speed limiting device is designed, using the speed sensor will change into a voltage signal transmission to

3、 the ECU (Electronic Control Unit), to control the speed of up to the required duty to cut off the circuit speed purposes. This paper introduced the working principle of speed device, described in detail the composition of the system, principles and testing methods. Hardware and software systems use

4、d to measure the process and measurement process. With the traditional speed devices compared to this over speed governor is simple in structure, innovative, easy-to-implement features. Throughout the experiment proved that within the governor have made a good result, the system has a good steady pe

5、rformance of accuracy and dynamic response, but also raise the speed limit device performance. The system aims to automatically limit the vehicle speed. It according to different road conditions, give different values of the speed limit; by measuring the speed of the current car, and set the speed l

6、imit compared to the value. When in the set speed limit value, so that automatically throttle clearance small, because this is a negative feedback control process that will enable cars to run at the speed limit near the speed limit value. limit value by the Transport Department are set according to road conditions, access to a kinds of traffic will be automatically changed when the speed limit value. However, the speed limit zone at the vehicle drivers can not change the speed limit value