The implementation of the scene illumination detection

The scene lighting test includes stadium lighting; Road, tunnel lighting; Commercial lighting; Square lighting; Lighting factory; Office lighting.

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intensity of illumination measurement to measure intensity of illumination should be observed when measured area, choose the representative area as a test unit. Will test unit is divided into 2 ~ 4 m square network ( Intensity of illumination uniformity is good, the grid spacing can be larger; Uniformity is a bit poor, grid spacing smaller) , the grid line from metope commonly 0. 5 to 1 m, in order to avoid affected by reflected light.

horizontal illuminance measurement, measurement plane generally high from ground zero. 8米; For corridors and stairs horizontal illuminance measurement, measurement plane for ground or water level within 15 cm away from the ground. Measurement should be carried out after all kinds of light output stability of the light source, the measurement process needs to keep the power supply voltage constant, when the power supply voltage and rated voltage is not a modification should be made for the measured results.

2, brightness

indoor brightness measurement refers to the brightness of the various surfaces of the indoor such as metope, ground, ceiling or face surface brightness is measured. The measurement points, the direct method and indirect method. The direct method is directly measured with luminance meter brightness. The indirect method is determined by measuring the intensity of illumination surface brightness. For diffuse surface, the surface brightness can be determined by the type

= L e. rho/PI

type of L - — Surface brightness ( cd/m2） ； E— — Surface illumination ( 1 x) ； ρ— — The surface reflectance ( %) 。

for diffuse surface or close to diffuse surface, we can use the direct method and indirect method. For the diffuse surface, we must use the meter to measure directly.

3, the color gentle color rendering index measurement

lighting spectral radiant color measurement instrument is a kind of portable, fast, and based on the principle of spectral photometric chroma tester. Using spectral color measurement instrument, we can finish in visible spectral band (under computer control 380 ~ 780海里) The spectral irradiance distribution of measurement, and then calculated by the software environment lighting light intensity of illumination, color temperature, color rendering index, color, and other light color parameters.

4,

spectral reflectance/transmission ratio measurement indoor spectral reflectance ratio and transmission ratio on the surface of the building, said in the full spectrum band materials for different wavelengths of light emission, due to the information which contains the spectrum, making it than ordinary without considering spectral information of single material surface reflectance or transmittance measurement more accurately describe the reflection characteristics of light and color material.

the three-color instrument co. , LTD, zhejiang university developed 'SPR - 300 b portable spectrum reflectometer 'is aimed at building metope, floor, ceiling and reflecting surface and door window glass transmission materials testing instruments. By color by the reflection characteristics of an object and object two factors determine lighting conditions, so by measuring the surface spectral reflectance of the building materials, we can get the object under the standard light source lighting shown color characteristics.

the system is mainly composed of four parts

1. CCD micro spectrometer. Measure the spectral radiant power distribution in the reflected light. (2) the PC computer. Receive measurement data, and analysis is given. (3) spectral reflection measurement software. Will be online, in all parts of the structure and control, data collection, analysis, reflectance and color parameters on the surface of the object. (4) CIEd / 0 reflectance measurement accessories. Measuring diffuse light, reflected light receiving material, and into the micro spectrometer.

spectral reflectance measurement steps

( 1) The computer, micro spectrometer and reflectance measurement with attachment connection is normal. （ 2) Mouth will be measured on the surface under test, click on the parameter Settings, enter the Settings interface, as shown in figure 5. In the interface on the right side of the exposure time of the first line of input, such as 40 ms. （ 3) Click on the spectrum measurement, measuring the spectral reflectance. （ 4) After completion of measurement can save, read, print, and other functions of data operation.

China lighting network