Automobile headlamp detector calibration device and all-digital display method thereof

Abstract

The invention discloses an automobile headlamp detector calibration device and an all-digital display method thereof. The calibration device comprises a lamp box, a horizontal deflection mechanism which is arranged on the bottom end of the lamp box, an upward and downward deflection mechanism which is arranged on one side of the lamp box and a circuit control module which is arranged in the lamp box. The circuit control module comprises a standard light source bulb, a horizontal displacement grating sensor, a vertical displacement grating sensor, a micro-processing unit, a voltage-stabilized power supply and a display unit. The voltage-stabilized power supply supplies power to the standard light source bulb and the micro-processing unit. The displacement grating sensors acquire linear displacement distance according to the movement of the deflection mechanisms, and the linear displacement distance is converted into the lamp box conversion leftward and rightward deflection angle valuesand / or upward and downward deflection angle values through the micro-processing unit and displayed on the display unit. The analog signals of the lamp box light source rotation angle and the luminousintensity are converted into the digital signals so as to realize all-digital display and output.

Description

technical field [0001] The invention relates to the technical field of automobile detection equipment, in particular to a calibration device and a full digital display method for an automobile headlamp detector. Background technique [0002] Automobile headlight tester is a measuring instrument for detecting the luminous intensity and beam deflection angle of automobile headlights. During use, due to the influence of environmental temperature, humidity, vibration, etc., the tester measures Accuracy may vary. In order to ensure the accuracy of automobile headlights, it must be calibrated regularly with the standard light source of the calibrator of the automobile headlight tester. [0003] At present, the standard light sources produced and sold by domestic and foreign manufacturers have the following shortcomings. First, the luminous intensity only shows the power supply voltage of the standard light source lamp, and the luminous intensity value of the standard light source...

AI Technical Summary

Problems solved by technology

[0003] At present, the standard light sources produced and sold by domestic and foreign manufacturers have the following shortcomings. First, the luminous intensity only shows the power supply voltage of the standard light source lamp, and the luminous intensity value of the standard light source can only be converted by referring to the voltage-luminous intensity conversion table. Inconvenient to use, and the maximum luminous intensity is only up to 80,000 candela, and the current relevant national standards require that the detection range of luminous intensity of automobile headlights has reached 120,000 candela, which can no longer meet the calibration requirements

The second is that the reading of the deflection angle of the light source beam is displayed by the reading of the scale value of the rotation angle of the rotating screw, which is not only difficult to read, but the reading accuracy is not high, and the reading cannot be directly output as an electrical signal, and cannot be directly output to the computer for data deal with

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