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Monday, November 1, 2010

Vehicle collision accident emergency call sensing module of the system

Vehicle accidents covers emergency call system, vehicle accident detection and identification technology, mobile vehicle location technology, wireless communication technology and electronic mapping technology, the automotive passive safety system, an integral part of, help to improve the response speed of the accident and emergency rescue efficiency reduce accident casualties. Vehicle collision, the collision sensing module will automatically determine the status of the accident, and wireless communication devices through the vehicle to vehicle accident information to the call center, so in a timely manner to the rescue. In this paper, emergency call system for vehicle collision accident sensing module hardware and software design, and through the car crash test verification of its reliability. Vehicle accidents introduced the composition and the emergency call system works. Summed up the emergency call system, vehicle accidents automatically trigger methods, including the information depends on the trigger airbag ignition method and an independent method to determine the trigger algorithm. Analysis of the use of false alarms occurred during the phenomenon of the reasons for the crash sensor module and to provide evidence.Collision sensing module for the functional requirements for the hardware and software design, to achieve a single chip serial communication with the host computer. Hardware peripheral circuit including the sensor, the microcontroller serial communication peripheral circuit and the basic circuit. Software design consists of two main parts: MCU lower machine process and the host computer's display and save the program.SCM processes including data collection and transmission. The PC is mainly LabVIEW programming, the function display and save the crash acceleration data. Crash test standards were based on car crash simulation test, and while taking advantage of the collision sensing module and test the system during the collision collision for Measuring the acceleration signal, the use of LabVIEW program shows the acceleration of the process of change in the collision, and for processing the velocity variation. The results of these tests can be further improved and the collision sensing module to provide a theoretical basis for development of trigger algorithms. 

Key words: emergency help, the collision sensor, serial communication, car crash test

 

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