| 汽车车速试验台实现原理分析 |
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| 引用本文： | 卢贵忠,刘跃明,刘科铭.汽车车速试验台实现原理分析[J].云南农业大学学报,2003,18(2):183-187. |
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| 作者姓名： | 卢贵忠 刘跃明 刘科铭 |
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| 作者单位： | [1]云南农业大学工程技术学院，云南昆明650201 [2]昆明理工大学交通学院，云南昆明650224 |
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| 摘 要： | 汽车车速检测系统由滚筒式车速试验台架、磁电式传感器、检测系统等组成。检测系统由8031单片机、74LS373锁存器、2764EPROM存储器、8155扩展I/O芯片等组成,应用MCS-51汇编语言,按模块化的要求编写采样计数程序。该系统能够满足汽车车速的检测要求,具有较高的自动化水平和可靠性。
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| 关 键 词： | 车速试验台 传感器 单片机 检测系统 |
| 文章编号： | 1004-390X(2003)02-0183-05 |
| 收稿时间： | 2002-11-5 |
The Analysis on the Checked System of Automobile Speed |
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| LU Gui-zhong,LIU Yue-ming,LIU Ke-ming.The Analysis on the Checked System of Automobile Speed[J].Journal of Yunnan Agricultural University,2003,18(2):183-187. |
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| Authors: | LU Gui-zhong LIU Yue-ming LIU Ke-ming |
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| Institution: | (1.College of Engineering Techudogy, Y A U, Kunming 650201,China;2.College of Communication, Kunming University of Science and Technology, Kunming 650224, China;3.Yunnan Communications Polytechnic, Kunming 650101,China) |
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| Abstract: | The validity of the data reflected in the speed gauge resolves the traveling safety directly. So, the gauge must be reliable. If its indication error is too big, the driver couldn't control the speed accurately, and produce traffic accident caused by false judgment for the speed. In order to improve the safety of the vehicles in use, the national standard GB-7258 rules that we should examine and rectify is using the vehicles periodically. There are two means for vehicle speed surveying, the Road Test and the Indoors Stage Test. The first stipulates that the vehicle pass a scheduled road test (which length is known) in different speeds. After surveying the time pass this way, calculate the real speed according to the formulas. Compare it with the figure read from the gauge, we can figure out the indication error. The latter talks about the experiment conducted on the rolling barrels-most of them use the single-chip microcomputer as centre of examine and process at present. By analyzing the error forming theory, then associate with the application of single-chip microcomputer, we relate the stage's construction, work theory, checking system, and so on. The vehicle speed examine system consists of the rolling-barrels, magneto electric sensors, and checking system. The checking system includes 8031single-chip microcomputer, 74LS373 latch, 2764EPROM memory, 8155 extended I/O chips. The system use the MCS-51 assembly language to write the sample calculation procedure according to the program structure of demands. It can satisfy the requirements of vehicle speed surveying, and it is automatic and reliable. |
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| Keywords: | test-bed of automobile speed sensor single chip microcomputer checked system |
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