Automotive blind spot detection system and method adopting microwave radar sensor and ultrasonic sensors

Abstract

The invention discloses an automotive blind spot detection system and method adopting a microwave radar sensor and ultrasonic sensors. The automotive blind spot detection system comprises the microwave radar sensor arranged in the middle of the tail end of an automobile and the ultrasonic sensors symmetrically arranged on two sides of the automobile, wherein the detection zone of the microwave radar sensor covers the rear ends of blind spots, for abutting lanes, of exterior rear-view mirrors and part of visible areas behind the rear ends of the blind spots of the automobile; the detection zones of the ultrasonic sensors cover the front ends of the blind spots for the abutting lanes, of the exterior rear-view mirrors of the automobile; the detection zones of the microwave radar sensor and the ultrasonic sensors wholly cover the blind spots of the exterior rear-view mirrors of the automobile, extending areas of the rear ends of the blind spots and extending detection areas at the tail end of the automobile. The detection performance of the blind spot detection system is guaranteed effectively or even improved, the system cost is reduced effectively, the function extensibility of the system is good, and one preferred scheme is provided.

Description

technical field [0001] The invention belongs to the field of automobile electronic equipment, and in particular relates to an automobile blind spot detection system and detection method comprising a single microwave radar sensor and several ultrasonic sensors. Background technique [0002] The current vehicle blind spot detection system, also known as blind spot monitoring system, blind spot assist system, etc., most models use vehicle-mounted microwave radar sensors. The target object (usually refers to the vehicle) within the blind area of ​​the exterior rearview mirror of the adjacent lane on the left and right sides of the vehicle is detected. [0003] figure 1 It is the original detection schematic diagram of the microwave radar blind zone detection system. Take the left probing description as an example (the right is symmetrical to the left). The microwave radar sensor 150 is arranged on the left side of the rear bumper of the car (referred to as the rear bumper), a...

AI Technical Summary

Problems solved by technology

The detection distance (range) of the ultrasonic blind spot detection system is too small, and there are serious deficiencies

At the same time, even though everyone is currently working hard to develop a long-distance ultrasonic blind spot detection system, its farthest detection distance is difficult to exceed ten meters; moreover, the detection distance of the ultrasonic sensor is greatly increased, and the detection response speed of the ultrasonic sensor will be significantly reduced. Compared with the blind zone system, the detection performance of the ultrasonic blind zone system still has a significant gap

[0011] However, the cost of a single ultrasonic sensor is less than one tenth of that of a single microwave radar sensor, so the cost of an ultrasonic blind spot detection system equipped with four ultrasonic sensors is less than four times that of a microwave radar blind spot detection system equipped with two microwave radar sensors. one-third

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