Construction of the 8051 SCM Vehicle Controller for Security

The security vehicle controller based on 8051 SCM was mainly made of three sub-system modules: password protection system, alcohol detection system and anti-collision system of ultrasonic distance-measurement. The password protection system was set up a password with four decimal digits as its code, and it enhanced anti-theft function of motor vehicles. Alcohol detection system used gas sensors to detect the driver's alcohol concentration of breath, which can effectively prevent the driver from drunk driving. The anti-collision system calculated the launch point barrier to the actual distance, so it may effectively prevent the collision event's occurrence. The controller overcomes the shortcomings of the traditional controller, which is function mono, low-precision, slow response, and so that it has high precision, high safety and reliability, easy to operate etc, and it has wide application value.