Automatic windscreen wiper control method based on heavy truck ADAS system

Abstract

The invention relates to an automatic windscreen wiper control method based on a heavy truck ADAS system. The control method comprises the specific steps that firstly, collected raindrop video images falling on a vehicle windscreen are digitalized into a YUV format; 2, recognizing the edges of raindrops on the windshield of the vehicle; obtaining Gx, Gy and N values of raindrops in each single-frame image; 3, matching the raindrop type of each single-frame image, and counting the raindrop type and the corresponding raindrop number; 4, determining a rainfall calculation value A = F * P according to the counted raindrop type and the corresponding raindrop number; and 5, controlling the rotation frequency of the windshield wiper according to the rainfall determination condition. According to the control method, control is not affected by rain and wind, the accurate number of raindrops in the heavy truck driving environment can be visually obtained, and the control method is more effective and low in cost.

Description

technical field [0001] The invention belongs to the technical field of vehicle electronics, and in particular relates to an automatic wiper control method based on a heavy truck ADAS system. Background technique [0002] In the existing automatic wiper control technology, a rain sensor is generally used to adjust the operating frequency of the wiper. The rain sensor is a kind of electronic sensor. At present, all heavy trucks use light-emitting diodes to send far-infrared rays and the amount of light reflected by the glass surface received by photodiodes to determine the operating frequency of the wiper. Specifically, when the glass surface is dry, the light is almost All are reflected back, so that the photodiode can receive a lot of reflected light; when there is more rain on the glass, less light is reflected back, and the result is that the wiper moves faster. Therefore, the rain sensor can adjust the action of the wiper according to the amount of rain falling on the gl...

AI Technical Summary

Problems solved by technology

[0003] However, the coverage area of ​​the far infrared rays of the rain sensor is limited, and it cannot act on the entire front glass surface of the car.

Therefore, when the rain falls on the area not covered by the rain sensor, the wiper cannot be controlled in time, resulting in the delay of the wiper action, which will affect driving safety to a certain extent.

Moreover, most models of heavy trucks need to install rain sensors separately on the front windshield, which is costly and expensive, and the arrangement of sensors will have a certain impact on the driver's line of sight, increasing driving safety hazards