Vehicle rear sound alarm device for back astern

Abstract

This invention relates to car back sound warming device, which comprises one microphone, one back gear detector and one horn and one controller. When the detector detects the back gear, the controller starts the microphone on back to collect the outer sounds and to control the inner horn to collect outer sound.

Description

technical field [0001] The invention relates to a sound warning device for reversing a car, especially a warning device which uses a microphone to collect the sound behind a car to avoid accidents when the driver is reversing. Background technique [0002] Because there are many small cars in urban areas, parking is even more difficult, so it is very important to reverse quickly and park safely on the side of the road. However, due to the existing car structure design, there are blind spots for the driver's vision on both sides of the car body and behind the car body, and the sound insulation effect in the passenger compartment of the current car is getting better and better. The sound is often difficult to detect, and often causes reversing accidents. [0003] The prior art uses wide-angle rearview mirrors to reduce the scope of blind spots. Although this technology has the effect of strengthening the vision on both sides of the car body, it still cannot reflect the obstac...

AI Technical Summary

Problems solved by technology

However, due to the existing car structure design, there are blind spots for the driver's vision on both sides of the car body and behind the car body, and the sound insulation effect in the passenger compartment of the current car is getting better and better. The sound is often difficult to detect, often causing reversing accidents

[0003] The existing technology uses wide-angle rearview mirrors to reduce the range of blind spots. Although this technology has the effect of enhancing the vision on both sides of the car body, it still cannot reflect obstacles behind the car body.

Therefore, the use of CCD cameras has recently been increased to capture images behind the car body to assist the driver to grasp the people or objects behind the car; When it is short, it cannot effectively transmit the situation behind the car body to the driver completely, which still causes inconvenience to the driver; moreover, the CCD camera is expensive and difficult to commercialize

[0004] Another kind of known technology is to install a reversing radar at the rear of the car body, although it can greatly reduce the cost; but this reversing radar is an electronic part that inevitably has the possibility of failure, and regardless of the above-mentioned CCD camera or the reversing radar, the driver Still can't hear the sudden sound before the accident behind the car, still can't prevent it in advance, there is still room for improvement

Images