Method for measuring automobile face area and measuring device thereof

Abstract

The invention relates to a method for measuring automobile face area and a measuring device. The measuring device includes a horizontal test site, vehicles to be tested, a background screen, a camera, an extensible reference board, and a computer, wherein the horizontal test site is used for guaranteeing that test vehicles carry out adjustment and alignment, the background screen is arranged on the back portion of the vehicles to be tested, the camera is arranged on a lifting tripod, the extensible reference board is placed in front of the vehicles to be tested and is arranged in a known area on the lifting support, and the computer is used for carrying out an image processing over the shooting images. A sideline extracting method is used for calculating the automobile face area, and the automobile face area can be measured accurately, errors of checking the pixel point method are effectively avoided, the measuring accuracy is improved, defects of the prior art is improved. The method for measuring the automobile face area and the measuring device have the advantages of being easy and convenient to operate, simple in structure and suitable for different kinds of vehicles.

Description

technical field [0001] The invention relates to a method for measuring the windward area of ​​an automobile, specifically a method for measuring the windward area of ​​an automobile by using the boundary line method, and also relates to a measuring device using the method. Background technique [0002] The windward area of ​​a car refers to the projected area of ​​the car in the direction of travel, and is a necessary parameter for calculating the air resistance coefficient of a car. At present, there are many methods for measuring the windward area, such as the theoretical windward projected area method, the method of drawing the outline of the vehicle by hand, the approximation method of multiplying the height and width of the vehicle, and the synthesis of engineering drawings. In November 2005, the fifth phase of automobile science and technology and the patent CN 62414603 A both disclosed a method and device for measuring the windward area of ​​a car, but this measureme...

AI Technical Summary

Problems solved by technology

In November 2005, the fifth phase of automobile science and technology and the patent CN 62414603 A both disclosed a method and device for measuring the windward area of ​​a car, but this measurement method uses the number of pixels to calculate the windward area of ​​the car, and the corners of the car cannot be well In the process of measurement, each pixel represents a certain meaning. When the distance is farther, the meaning of each pixel will increase, so the measurement error will gradually increase.

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