Device for measuring luminance coefficient distribution of pavement paving material

Abstract

The invention relates to a distributed material reflection property measurement device for measuring a change rule of the luminance coefficient of a pavement material along the incident direction of light. According to the device, the luminance coefficient of the pavement material is a luminance value of unit luminance accepted by a pavement and reflected in the sight direction of a driver, is relevant with the direction of an incident light and is necessary basic data for pavement illumination design. The device comprises a light source rotating mechanism, a rack (8), a luminance meter (3), a sample position adjusting table (9), a light source (1) and a motor control circuit, wherein the rack (8) is used for supporting the luminance meter and a measured sample; the light source (1) is mounted on one side of a transverse shaft rotating arm (10), and the other side of the transverse shaft rotating arm (10) is mounted on a transverse shaft of a motor assembly (4) mounted at an endpoint of one side of a vertical shaft rotating arm (11); the transverse shaft rotating arm (10) can rotate in the latitude direction under the driving of the motor assembly (4); one side of the vertical shaft rotating arm (11) is mounted on a vertical shaft of the motor assembly (4) and can rotate by 360 degrees in the longitude direction. The device with the solution scheme disclosed by the invention has the advantages of simple structure, small occupied space, usability of multiple light sources and the like.

Description

technical field [0001] The invention relates to a measurement of light reflection characteristics of road pavement materials, in particular to a distributed reflection characteristic measurement device for measuring the change law of road surface brightness coefficient with light incident direction when the viewer's line of sight is at a fixed angle to the road surface. Background technique [0002] Due to the huge energy saving potential, new light sources such as light emitting diodes (Light Emitting Diode, LED) are more and more widely used in road lighting. After the emergence of LED street lamps, how to improve the quality of road lighting while saving energy has attracted much attention. The purpose of road lighting is to increase the safety, flow and comfort of road traffic by illuminating the road surface and its surrounding environment to make the targets on the road visible to drivers. The brightness of the road surface perceived by the driver depends on two facto...

AI Technical Summary

Problems solved by technology

It is impossible to measure the variation of the luminance coefficient with the incident angle when the illumination light is incident from any direction in the hemisphere space

US patent application US787275382, "Method and apparatus for establishing reflection properties of a surface" discloses a road surface luminance coefficient measurement device, but the device can only give the measurement data of 5 light source inclination angles, which is suitable for rough estimation on site and cannot satisfy Comprehensive and accurate measurement of brightness coefficient of pavement materials

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