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Measurement error correction method for automobile head light

A technology for measuring errors and automobiles, which is applied in the field of correcting the measurement errors of the horizontal illumination azimuth angle of the headlight beams of automobiles, and can solve the problems of large automatic detection errors and high misjudgment rate.

Inactive Publication Date: 2007-07-18
NANJING FORESTRY UNIV
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Problems solved by technology

[0006] In order to solve the problems of large automatic detection error and high misjudgment rate of the beam irradiation azimuth angle of the current automobile headlight, the invention provides a method for correcting the measurement error of the automobile headlight, which can correct the difference between the longitudinal axis of the automobile and the The measurement error of the azimuth angle of the horizontal direction of the beam of the automobile headlight caused by the incomplete vertical of the track of the detector

Method used

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  • Measurement error correction method for automobile head light
  • Measurement error correction method for automobile head light
  • Measurement error correction method for automobile head light

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Embodiment Construction

[0034] CV-155L black-and-white CCD camera, PCI-1407 image acquisition card, IBM NetvistaA10 computer and FD-1 headlight detector are used to form the measurement and correction system shown in Figure 1. The CCD camera is installed in the headlight inspection tool. Above the car, 3m above the ground, the computer processing program is shown in Figure 4. According to the current automobile headlight inspection standard, the system is used to measure the azimuth angle of the high beam horizontal illumination of the left headlight of an ordinary Santana car 10 times. The measurement results and error correction results are as follows:

[0035] unit:

[0036] Detector indication value β

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Abstract

The invention discloses a method for automatically correcting the measurement error of automobile headlight beam irradiation azimuth in horizontal direction which is used for full automatic detection of headlight on the automobile safety detection line. The invention utilizes a system composed of a CCD pick-up head mounted above the detection position, an image collecting card, a computer and a headlight detector to obtain the digital image of the automobile parking area in the real detection position, and process the image in the computer, and measure the offset angle between the automobile longitudinal axis and theoretic measurement direction, then correct the measurement value of headlight detector. The invention can diminish the measurement error, improve the headlight detection accurate rate and efficiency.

Description

Technical field [0001] The invention relates to a method for correcting the measurement error of the horizontal irradiation azimuth angle of the light beam of the automobile headlamp, which is mainly applicable to the automatic detection of the automobile headlamp on the automobile safety performance detection line. technical background [0002] In order to ensure the safety of driving at night, the azimuth angle of beam irradiation of automobile headlights must meet the requirements of national standards, and the detection of azimuth angle of beam irradiation of in-use automobile headlights is a mandatory item for automobile safety performance testing. With the rapid development of the automobile industry, the requirements and speed of automobile performance testing are getting higher and higher. For this reason, the use of fully automatic headlight detectors is becoming more and more common. [0003] According to the GB7258-1997 national standard "Technical Conditions for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/06G01B11/26B60Q1/04B60Q11/00B60S13/00
Inventor 闵永军朱柳建
Owner NANJING FORESTRY UNIV
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