文档介绍：基于光电原理的五轮测速方法的研究
易灿
摘要:在车辆行驶性能测试中历来采用五轮仪,五轮仪价格适中,在低、中速范围内
尚能满足一般的测试需要,其缺点是由于第五轮充气量等原因,轮圈直径有误差,使
用前需多次标定,另外当速度高于80 公里/ 小时时,道路的稍许不平会引起轮盘跳动和
打滑,从而带来测量误差。五轮仪较重,特别对小型车辆成为一负载,限制了车速,
因此五轮仪不能满足小型车辆和高速段的测量要求。为改变此种状况,许多科研人员
研制了或正在研制可以取代五轮仪的测速装置。本文提出了一种基于图形芯片实现车
载的非接触测速装置的新方法,并且对其研制过程进行了介绍。
关键字:PAN101B 非接触测速 PS/2 串行协议 AVR 单片机
I
A Research on Five-Wheel Speedometer Based on Photoelectricity
Theory
Yi Can
Abstract: Five Wheel Meter is employed in the vehicle travel performance test for a long
's not expensive, and it fulll the requirement of general test in the low and medium
velocity backwardness is that the diameter of the fth wheel will not so accuracy for
ination and other reasons,so it should be adjusted repeatedly before ,when
the speed is above 80 km/h, the slightly bumpy road will make the wheel jumping and slid-
ing, this will bring in Wheel Meter is heary, and will be a load of a minicar and
also a limit of speed in the test,so the Five Wheel Meter is not suitable for the minicar and a
high velocity changing this backwardness, the researchers developed or are
developing some novel device for replacing the Five Wheel paper introduced a new
method for producing carriage non-contact speedometer which based on the image sensor,and
gives a description of this project.
Keyword: PAN101B Non-contact Speedometer PS/2 Serial Protocol AVR
II
目录
引言. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
第 1 章非接触测速的一般原理. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
基于多普勒原理. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
激光多普勒测速技术. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
基于图像识别原理. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
梳状光电传感器. . . .