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For the bicyclist, covert intersection is always dangerous.The traditional convex mirror has its faults such as occupying space and light pollution;The user can’t identify it or judge quickly from the mirror .This scheme can solve the problem. When the sound wave device is detecting a car and a bicyclist, the information will be processed by the CPU which will calculate whether there is a possibility of collision. If so , reminders will flash a red light and issue an alarm. In most cases reminders flash yellow light at low frequency. This device will not only provide security guarantees, but also give psychological security for the bicyclist.
Yancheng Institute of Technology