safety of vehicles traveling at top speed when the vehicle driving state, the system
time through the speed sensor to monitor motor vehicles. LED display by the actual
vehicle speed and the user to set the security parameters. When they find the driver set
the vehicle speed exceeds the maximum value, the buzzer began to alarm, flashing
warning lights to alert drivers slow down. To achieve the purpose of preventive
measures. Its applications are continually deepening, while the traditional control and
test drive the rapidly growing update. In real-time detection and control of the
microcomputer application system, the microcontroller is often used as a core
component. This design is a used 8051 vehicle for speeding on the situation of alarm
beep alarm and lighting systems. The system is simple, high reliability and easy
operation, can be widely used in motorcycle, automobile and other motor vehicles.
The design details of the system's overall design scheme, given the interface module
and the interface circuit 8051, system hardware and peripheral circuit design, software
design methods, introduced last degree program flowchart.
Key words:8051; Sensor; Interface module; Alarm
目 录
1 绪论..................................................................................................................................................4
2 概述..................................................................................................................................................5
2.1 设计思路...............................................................................................................................5
2.2 方案论证...............................................................................................................................5
2.3 方案的提出...........................................................................................................................6
2.4 方案的比较及确定...............................................................................................................8
3 系统总体方案及硬件设计............................................................................................................10
3.1 硬件概述.............................................................................................................................10
3.1.1 AT89C51 单片机......................................................................................................10
3.1.2 AT89C51 主要性能参数.........................................................................................10
3.1.3 AT89C51 功能特性概述.........................................................................................10
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