Calibration device for measuring intensity distribution characteristics of road traffic signal lights

Abstract

The invention discloses a calibration device for measuring the intensity distribution characteristics of road traffic signal light, which includes an initial position positioning unit, a light source receiving unit, a light intensity distribution control unit, and a monitoring unit; the initial position positioning unit is turned on to complete the light intensity The distribution control unit determines and collects the measurement zero point on the light source receiving unit; starts the light intensity distribution control unit, moves the light intensity distribution control unit to the position of the point to be measured on the light source receiving unit, and collects the corresponding light intensity of the signal lamp at the point to be detected Data; in the process of collecting light intensity data, the monitoring unit collects the stability data of the signal light, and corrects the light intensity distribution data. The signal lamp of the present invention does not move, and the detector operates, which eliminates the measurement error caused by the change of the ignition posture of the signal lamp when it is rotated, the spatial misalignment of the rotation axis, the deformation of the filament, the instability of the light source during the measurement process, and the angle error caused by the turntable where the light source is placed. .

Description

technical field [0001] The invention relates to a calibration device for measuring the intensity distribution characteristics of road traffic signal lights, and belongs to the technical field of signal light intensity distribution measurement. Background technique [0002] Traffic lights, as the baton of urban traffic, play an increasingly important role in maintaining traffic order and ensuring traffic safety. Traffic signal lights: According to the purpose, traffic signal lights can be divided into three types: motor vehicle, non-motor vehicle and pedestrian crossing signal lights. Motor vehicle and non-motor vehicle signal lights usually have three colors: red, green, and yellow; pedestrian crossing signal lights usually have two colors: red and green. [0003] GB 14887-2011 "Road Traffic Signal Lights" stipulates the luminous intensity of traffic signal lights: the measurement distance of luminous intensity is 10m. For non-motor vehicle signal lights with LED outline p...

AI Technical Summary

Problems solved by technology

Using the measurement method of signal lamp rotation, there is a problem that its rotation axis is difficult to determine; secondly, the rotation axis of the lamp and the rotation axis of the turntable can be accurately measured

However, the two rotating shafts are not visible in space, so coaxiality is difficult to achieve, and large measurement errors will be introduced

[0008] (3) The luminescence of lamps and lanterns is not absolutely stable. The error caused by the stability is not only related to the type of lamp, but also the individual lamps and lanterns of the same manufacturer, model and batch have differences in luminescence stability.

Therefore, the luminous stability of the signal light will introduce a certain measurement error

[0009] (4) When incandescent lamps and low-voltage halogen lamps rotate non-horizontally, their filaments will be slightly deformed under gravity, which will also cause changes in light intensity values, resulting in the introduction of certain measurement errors

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