Visual lighting calculating vertical illuminance
- Visual lighting calculating vertical illuminance how to#
- Visual lighting calculating vertical illuminance manual#
- Visual lighting calculating vertical illuminance full#
Generally, the farther the illuminance of the venue is from the light pole, the lower the illuminance value. Generally, there is no clear requirement for the illuminance uniformity of square lighting, but the stadium lighting illuminance and uniformity of illuminance have higher requirements.
Visual lighting calculating vertical illuminance full#
The application of this algorithm has solved the problem of illuminance uniformity evaluation.Įxamples have proved that Tachyon Light can give full play to its advantages for non-linear optimization problems similar to the evaluation of illuminance uniformity, or problems with many optimization parameters, or problems where the objective optimization function is not easy to express. In the process of renewal, it can not only ensure that each particle is fully evolved, but also ensure the continuity between particles, and maintain the diversity of the particle swarm. The least squares method used all the time often results in the inaccurate judgment of the evaluation object.Ī quasi-sinusoidal particle swarm algorithm is proposed, namely According to the designed method of changing the group size and the diversity function, the particle swarm automatically adjusts its scale according to the quasi-sine law at the peak and valley values of each sine wave band, and then updates the particle position and velocity according to the basic particle swarm algorithm. Due to the non-linearity of the illuminance uniformity itself, it is difficult to directly implement the minimum area evaluation according to the definition. The problem of illuminance uniformity is of great significance in the field of precision machining, so the accurate evaluation of illuminance uniformity is of great significance. Evaluation Technology of Illumination Uniformity Through the study of its working principle and production method, combined with the requirements of use, the light source required by the system is produced: the diameter of the surface light source is Ф= 100mm, and the lighting bulb adopts 24V, 250W tungsten halogen lamps to meet the color temperature requirements, and reflect the lighting bulbs Cover to improve the light efficiency, the brightness of the surface light source is adjusted by changing the light barriers of different light apertures the stability of the light source is guaranteed by the design of the dedicated power supply. In order to obtain the high stability and high uniformity surface light source required for measurement, after comparing the advantages and disadvantages of common methods such as diffusion method, multi-beam method and integrating sphere method, the system finally chose the cylindrical cavity surface light source method. ③In order to facilitate the adjustment of the entire measurement system, the brightness of the surface light source is adjustable. ②The unevenness of radiance at each position on the light source surface should be less than 5% of its maximum radiance, and the variation of brightness with time during measurement must be within ☒%. ①The area of the surface light source should be large enough to cover the maximum field of view of the tested lens, and its correlated color temperature is 2856. The design of the light source should meet the following conditions: The uniformity and stability of the surface light source is the key to realizing the detection, which is directly related to the accuracy of the measurement result. The uniformity of illuminance above 0.7 is achieved on the top work surface. The Chinese lighting standards stipulate that the lighting of indoor work areas should be in. The uniformity of illuminance refers to the ratio of the lowest illuminance to the average illuminance value on a given plane (sometimes the ratio of the highest illuminance value).
Visual lighting calculating vertical illuminance manual#
It is calculated by considering the superposition of the horizontal illuminance of each light source to a point, and manual calculation is of course very troublesome. Linear light source azimuth coefficient method The minimum illuminance value is calculated according to the point-by-point calculation method.
Illuminance uniformity = minimum illuminance value / average illuminance value
The closer the illuminance uniformity is to 1, the better, otherwise the smaller the more visual fatigue. The more uniform the light distribution, the better the illuminance and the more comfortable the visual experience. The uniformity of illuminance refers to the ratio of the minimum illuminance to the average illuminance on the specified surface. What is uniformity in lighting? Brief Introduction
Visual lighting calculating vertical illuminance how to#