Calibration device for measuring light intensity distribution characteristics of road traffic signal lamp

Abstract

The invention discloses a calibration device for measuring light intensity distribution characteristics of a road traffic signal lamp. The calibration device comprises an initial position positioningunit, a light source receiving unit, a light intensity distribution control unit and a monitoring unit. The initial position positioning unit is started and used for determining and collecting a measurement zero point of the light intensity distribution control unit on the light source receiving unit; the light intensity distribution control unit is started and moved to a to-be-detected point position of the light source receiving unit, and corresponding light intensity data of the signal lamp is collected at the to-be-detected point position; and in the process of collecting the light intensity data, the monitoring unit collects stability data of the signal lamp and corrects the light intensity distribution data. The signal lamp is fixed, a detector operates, and measurement errors causedby the problems of signal lamp rotating ignition point posture change, rotating shaft space misalignment, lamp filament deformation, light source instability in the measurement process, angle errorscaused by a rotary table where a light source is placed and the like are eliminated.

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

Images