Tire pattern depth rapid measurement device and calculation method

Abstract

The invention discloses a tire pattern depth rapid measurement device, which comprises a shell, a calculation unit, a camera, a switch, a first reflecting mirror, a second reflecting mirror and a laser, and is characterized in that: the laser and the camera are horizontally arranged in the shell and are parallel to each other; and the first reflecting mirror and the second reflecting mirror are respectively arranged at positions opposite to the laser and the camera, the angle between the first reflecting mirror and the horizontal direction is 45 degrees and is not changed, the angle between the second reflecting mirror and the horizontal direction is adjustable between 50 degrees and 80 degrees, the shell is provided with a window above the first reflecting mirror, a switch is arranged at the upper part of the shell and is positioned in front of the window, the calculation unit is in communication connection with the camera and the laser through signal lines and used for controlling the camera and the laser to work and operating data, and the switch is connected with the computing unit and used for controlling the laser and the camera to work. The position of the groove of the pattern can be accurately and effectively extracted based on a calculation method of a local threshold. The whole device has the advantages of being accurate in measurement, small in error, simple in structure and capable of greatly reducing the size of detection equipment.

Description

technical field [0001] The invention relates to the technical field of tire tread measurement, in particular to a tire tread depth rapid measurement device and calculation method. Background technique [0002] The main function of the pattern of automobile tires is to drain water when there is water on the road and increase the friction between the tread and the road surface to prevent the wheels from slipping. The depth of the tire pattern has a great impact on the safety of driving. The objective law is that the pattern will become smaller and smaller during use. In order to ensure the effectiveness of the pattern effect, countries around the world have formulated clear regulations on the tire tread wear limit, and molded the tire wear at several equal parts along the circumference of the tire shoulder. Limit alert sign. [0003] However, most motor vehicles will neglect to check the tire tread depth. As the service life of the motor vehicle increases, the tire tread will...

AI Technical Summary

Problems solved by technology

However, most of the current triangulation equipment is directly irradiated by lasers, so the volume is relatively large, the height is high, the wheels are inconvenient to go up and down, or grooves need to be opened on the ground, and maintenance is relatively inconvenient

At present, there are also similar optical reentry structures to reduce the size of the device, such as: an optical device for automatically measuring tire tread depth 201820172196.6, the laser line in the device is not perpendicular to the horizontal plane, which makes the calculation method complicated, and the viewing window is too large, which is not easy design glass protection

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