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Millimeter-wave radar is not restricted by weather conditions. It can operate normally even in rain and snow. It has strong ability to penetrate fog, smoke and dust, low cost, close detection distance and high accuracy, and is not affected by light conditions, so it is commonly used. In the daily scene of parking lot detection and automatic parking.

Millimeter-wave radar measures the physical environment information (such as the relative distance, relative speed, angle, direction of movement between the car and other objects) around the car body by transmitting radio signals (electromagnetic waves in the millimeter wave band) and receiving reflected signals, and then According to the detected object information, target tracking and recognition classification are carried out, and then the data fusion is combined with the body dynamic information to complete a reasonable decision and reduce the probability of accidents.