Abstract
With the rapid development of the global economy, the vehicle population increases rapidly year by year, but the traffic accidents have also increased. The vehicle population in China only accounts for 2-3% of the world at present, but the death is about 20% of the world. China has become the world's most serious national in the traffic accidents. In order to make the traffic accident rescue convenient, the automatic asking for help system is studied, and the software and hardware are also designed. The control system uses the PIC18F458 as a controller, which combines with the modern sensor technology and GPRS, and realizes the automatic asking for help in traffic accidents. Experiments show that the system has the advantages of stability, reliability and strong anti-interference ability.
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