Abstract
According to the survey data, the annual death toll due to traffic accidents in the world reaches 1.25 million, in China is as high as 104,000, ranking first in the world. In the death rate of traffic accidents, more than 60% are caused by early warning or rescue in time. At present, there are many problems in China's traffic accident emergency rescue, such as low efficiency, rescue in time. According to the demand of smart city construction, the traditional emergency rescue mode of traffic accident is facing transformation. The rapid popularity of tachograph in recent years can be seen that car owners' awareness of safe driving is strengthening. However, the functions of the traditional tachograph are mostly limited to being the evidence carrier of traffic disputes. The latest multifunctional recorder on the market also aims to improve user experience, increase intelligent voice, navigation and other functions, and has not been applied in traffic accident emergency rescue.
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