A detection method, reminder system and control method for standard wearing of seat belts

Abstract

The invention provides a detection method for standard wearing of a safety belt, a reminding system for standard wearing of the safety belt and a control method for the reminding system. The detection method is conducted on the basis of the safety belt with marks and a camera, the machine vision and digital picture processing technique is used for obtaining center coordinates of the marks, and the marks are divided into the shoulder strap marks and the waistband marks; and center coordinate point sets of the two types of marks are subjected to line segment fitting, the tightness degree of the safety belt can be judged through the dispersion degree of each type of marks relative to the two sides of a corresponding fitting line, the wearing height condition of the safety belt can be detected through the position of an intersection point of a shoulder strap fitting straight line and a passenger shoulder contour line, and therefore whether the safety belt is worn in a standard manner or not is detected. The method is good in instantaneity and self-adaptive capacity and is still good in detection accuracy when the conditions that the sitting posture of a front-row passenger is changed, the position of a seat is adjusted, and the height and the figure are greatly changed happen. Based on the detection method, the invention further discloses the reminding system for standard wearing of the safety belt and the control method for the reminding system.

Description

technical field [0001] The present invention relates to the technical field of vehicle safety, and more specifically, to a detection method, a reminder system and a control method for whether the front row occupants of the vehicle are wearing safety belts. Background technique [0002] Seat belts are known as one of the great inventions of vehicle safety technology. When used in conjunction with airbags, they can greatly reduce the fatality and injury rates of vehicle occupants when traffic occurs. When a vehicle collides with an accident, there are four situations as follows: the first, if the front passenger (in the present invention refers specifically to the driver and passenger seat passenger) does not wear a safety belt, the airbag will not only fail to protect it, but will even Further harm the occupants; Second, if the front seat occupants wear seat belts but wear them incorrectly, that is, the correct wearing is a three-point wearing, such as Figure 5 shown, the in...

AI Technical Summary

Problems solved by technology

This method and device for seat belt identification through machine vision is somewhat progressive, but only the first and second situations are identified through the above method and device, that is, it can only identify whether it has been worn and whether it is a three-point seat belt. Wear it correctly, but cannot identify the third situation above, that is, cannot identify whether the tightness of the wearing or whether the high or low position is appropriate

Moreover, most of the existing machine vision recognition methods have low accuracy

If the occupant's sitting posture changes, the seat position is adjusted, and the body shape of the occupant changes greatly, it may cause false or missed reminders; When approaching, it is also prone to false reminders or missed reminders

Furthermore, the structure of some existing machine vision recognition systems is relatively complicated.

[0006] It can be seen that the existing safety belt wearing reminder device mainly solves the detection and reminder of whether the seat belt has been worn correctly, but generally ignores the detection and reminder of whether the seat belt has been worn but is not worn properly.

Images