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Motor vehicle headlamp detector light intensity detection method

A detection method and technology of headlights, which are applied in the direction of testing the alignment of automobile headlights, photometry, and testing optical properties, etc., to achieve the effects of solving brightness loss, high detection accuracy, and ensuring accuracy

Inactive Publication Date: 2013-10-16
佛山分析仪有限公司
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Problems solved by technology

However, there are many points for calibration of the instrument. When fitting the light intensity surface, the traditional calculation method has problems such as huge amount of calculation and serious time-consuming. Therefore, it is necessary to find a simple and feasible method.

Method used

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  • Motor vehicle headlamp detector light intensity detection method
  • Motor vehicle headlamp detector light intensity detection method
  • Motor vehicle headlamp detector light intensity detection method

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Embodiment Construction

[0037] The light intensity detection method of the motor vehicle headlight detector of the present invention comprises the following steps:

[0038] a. Use the headlamp detector calibrator to calibrate the headlamp detector, set the luminous intensity of the calibrator to a fixed value, and place the optical axis offset angle of the calibrator at different calibration points, Read and record the luminous intensity indication value f(x i ,y i );

[0039] b. For each luminous intensity value f(x) recorded above i ,y i ) to fit the light intensity surface to obtain the light intensity surface equation;

[0040] c. Using the light intensity surface equation in the above step b, the headlight detector corrects the read luminous intensity indications of the headlight at each offset angle point to obtain the real light intensity value of the headlight.

[0041] Wherein, the verification test points described in the above step a include some reference points as shown in Table 1; ...

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Abstract

A motor vehicle headlamp detector light intensity detection method is disclosed. The method has the following steps that firstly, a headlamp detector calibrator is used to calibrate the headlamp detector, a calibrator illumination intensity is set to be a fixed value (CD), calibrator optical axis offset values (angles) are arranged on different verification points respectively, and a corresponding light intensity value f (xi, yi) of the headlamp detector is read and recorded; secondly, the light intensity value f (xi, yi) carries out light intensity curving surface fitting; finally, when the motor vehicle headlamp irradiates as the different optical axis offset values (angles), the headlamp detector corrects the read light intensity value through a light intensity curving surface equation so as to obtain the real light intensity value of the headlamp. By using the method of the invention, problems that an operand is large, time consuming is severe and so on in an original fitting method are overcome so as to guarantee accuracy of detection of the headlamp detector.

Description

technical field [0001] The invention relates to a motor vehicle safety detection device, in particular to a light intensity detection method for a motor vehicle headlamp detector. Background technique , [0002] Headlights are important equipment for motor vehicles to provide road lighting for drivers at night or under conditions of low visibility, and are also light signal devices for drivers to warn and communicate. Headlight inspection is an important item in motor vehicle safety performance inspection, and must meet the requirements of GB 7258 "Technical Conditions for Motor Vehicle Operation Safety". Under normal circumstances, the high-beam luminous characteristics of the headlights, the luminosity distribution of the ellipse is basically symmetrical in the up-down direction and left-right direction, and the closer to the center point, the greater the irradiance. [0003] The headlight tester is used as a detection instrument for headlights. The detection of the lumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/00G01M11/06
Inventor 何桂华
Owner 佛山分析仪有限公司
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