Automobile headlamp test data error correction method based on driving direction

A technology of automobile headlights and driving direction, which is applied in the field of error correction of automobile headlight detection data based on driving direction, can solve the problems that the longitudinal axis is not necessarily consistent with the driving direction, and achieve fully automatic detection, low cost, The effect of improving accuracy

Inactive Publication Date: 2014-12-24
NANJING FORESTRY UNIV
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Problems solved by technology

This method can reduce the measurement error, but the longitudinal axis of the vehicle is not necessarily consistent with the driving direction, which is not consistent with the actual application of headlights

Method used

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  • Automobile headlamp test data error correction method based on driving direction
  • Automobile headlamp test data error correction method based on driving direction
  • Automobile headlamp test data error correction method based on driving direction

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Embodiment Construction

[0042] refer to figure 2 To construct a data error correction system for the detection data error of the beam irradiation direction of the automobile headlights, in an embodiment of the present invention, a CMOS digital binocular camera is set directly in front of the parking space to be checked, about 1 meter above the ground. Firstly, sixteen target images are collected and transmitted to the computer, and the camera is calibrated through the computer program to obtain the internal parameters, external parameters and system structure parameters of the camera, and complete the initialization of the system. Then, with the steering wheel returning to the normal state, the car slowly moves forward from the starting position and parks in the parking space to be checked. During this period, ten frames of visual images of the car are taken, and the actual driving direction of the car is obtained through computer program analysis, and the driving direction is calculated. The angula...

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Abstract

The invention provides a method for correcting errors of measured data in the horizontal light beam irradiation direction of an automobile headlamp detector. The method is mainly suitable for conducting full-automatic detection on an automobile headlamp in an automobile performance detection station. A system is composed of a binocular camera installed right ahead a stall to be detected, a computer and the headlamp detector. Automobile body feature points of automobile images are detected through a morphological image processing method and Hough transformation, sequences of three-dimensional coordinates of the feature points are fitted, the automobile driving direction is acquired, the angle deviation between the driving direction and a driving guide line is analyzed, and the measured data in the horizontal light beam irradiation direction of the headlamp detector are corrected. The method can automatically correct the errors of the measured data of the automobile headlamp, the accuracy of the detection result and measurement repeatability are improved, and guarantees are provided for safety driving of an automobile at night.

Description

technical field [0001] The invention relates to a method for error correction of the detection data of automobile headlights. By analyzing the angle deviation between the actual driving direction of the automobile and the driving guide line of the vehicle detection station, the accuracy of the automobile headlight detector can be corrected. The measurement data of the irradiation direction of the horizontal light beam is corrected to reduce the measurement error, and the invention is suitable for the automatic detection of automobile headlights in vehicle performance detection stations. Background technique [0002] The headlight is one of the important parts to ensure the safe operation of the car, and plays an important role in the safety of driving at night. Headlight detection is an important item for vehicle inspection stations to evaluate vehicle safety performance. It is mainly to detect whether the luminous intensity and irradiation direction of headlights meet the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/06G06T7/00
Inventor 陈佩江闵永军
Owner NANJING FORESTRY UNIV
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