Calibration device and method of car door closing force tester

Abstract

The invention discloses a calibration device and method of a car door closing force tester, belonging to the technical field of object speed characteristic test. The prior art is lack of precise and steady speed reference source. According to the calibration device, disclosed by the invention, a transparent cup is located on a base; the internal space of the transparent cup is at a vacuum state; a bracket and a ruler are respectively vertically fixed on the base; an absorbing electromagnet is fixed on an annular lifting leather belt; the annular lifting leather belt is wound on an upper guideroller and a lower guide roller; the upper guide roller and the lower guide roller are fixed on the bracket; a release shutter is located at a height where a steel ball begins falling off and is backagainst the ruler; the release shutter is made of a material which cannot be magnetized; a low end of an upper slide way is close to the upside of the release shutter; the high end of the upper slideway is located at the position where the absorbing electromagnet passes through; the high end of the lower slide way is located at the position where the steel ball falls off; and the low end of the lower slide way is close to the position where the absorbing electromagnet passes through. The calibration method, disclosed by the invention, comprises the steps of: firstly, calculating a speed vb of a test point; secondly, testing a falling speed vb' of the steel ball at the test point by the tester; and thirdly, comparing the calculated speed vb of the test point with the tested speed vb' to obtain a test error of the tester and finish the calibration.

Description

technical field [0001] The present invention relates to a calibration device and method for a vehicle door closing force tester, which is a method and device for generating a speed reference source. A speed reference source is established in the manner of gravitational acceleration transmission for calibrating a vehicle door closing force tester, belonging to Object velocity characteristic testing technical field. Background technique [0002] In the automobile manufacturing industry, the door closing force is used to characterize the performance of the door shaft system and lock system of the door. In order to detect the closing force of the car door, an article entitled "Development of the Door Closing Force Tester" published in the 12th issue of "Automotive Technology" in 2007 discloses a car door closing force tester and a line that detects a certain point on the edge of the car door. speed to calculate the door closing force method. The vehicle door closing force test...

AI Technical Summary

Problems solved by technology

[0006] The problem with the known technology about the speed reference source is that, in the first known technology, civilian 50 Hz alternating current obviously cannot obtain sufficient precision as a time reference, and this scheme has mechanical movement time loss when hitting the dot, so it cannot It is possible to ensure that the response time of the dot is consistent, so it will bring a large error

The second known technology is accurate enough in time measurement, but it is difficult to achieve consistent conversion between circular motion and linear motion, and it is difficult to obtain a stable speed reference

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