A color temperature control method for a tunnel led lighting system
A technology of LED lighting and color temperature control, applied in electrical components and other directions, can solve the problems of not giving the recommended value of the color temperature of the light source, high color temperature adjustability of LED tunnel lights, and not taking into account the different visual conditions of drivers.
Active Publication Date: 2021-07-06
SOUTH CHINA UNIV OF TECH +2
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Problems solved by technology
[0003] At present, there are three main problems in tunnel LED lighting: 1. The current "Design Rules for Highway Tunnel Lighting" only gives recommended brightness values for each lighting section, but does not give recommended color temperature values for light sources; 2. All tunnels are equipped with a color temperature LED tunnel lights, which do not take into account the different visual conditions of drivers under different visibility and lighting brightness; 3. Compared with high-pressure sodium lamps and metal halide lamps, LED tunnel lights have high color temperature adjustability, but they are not well adjusted. use
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[0037] The content of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0038] In this embodiment, the tunnel LED lighting system includes a luminance meter, an interval speed measuring device, a visibility detector, a control center and an LED tunnel light. The tunnel is divided into several lighting sections, and the luminance meter is used to measure the brightness of each lighting section; the interval speed measuring device is used to measure the average speed of vehicles in the tunnel; the visibility detector is used to measure the attenuation coefficient in the tunnel.
[0039]In the color temperature control method of the tunnel LED lighting system provided in this embodiment, at least two LED modules with different color temperatures need to be set for each LED tunnel light, and by changing the duty cycle of the PWM co...
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The invention discloses a color temperature control method of a tunnel LED lighting system, comprising the steps of: 1) transmitting measurement data to a control center by a luminance meter, an interval speed measuring device, and a visibility detector; 2) judging the congestion degree of the tunnel; 3) the control center Determine whether the visibility meets the requirements, then determine the target color temperature of the LED tunnel light, generate and send PWM control signals to each LED module, so that the actual color temperature of the LED tunnel light reaches the target color temperature; among them, when the visibility meets the requirements, it is necessary to judge the lighting section Brightness belongs to the category of vision. Compared with the traditional dimming method, the present invention considers the influence of the color temperature of the light source on the driver's visual effect, adjusts the color temperature of the LED tunnel light according to the visual category of the visibility and the brightness of the lighting section, effectively improves the tunnel lighting environment, improves the lighting quality, and improves driving safety. safety and comfort.
Description
technical field [0001] The invention relates to the technical field of tunnel LED lighting, in particular to a method for controlling the color temperature of a tunnel LED lighting system. Background technique [0002] Compared with other lighting systems, LED lighting system has excellent performances such as high luminous efficiency, long service life and low energy consumption, and is being widely used in tunnel engineering. Due to the semi-enclosed environment of the tunnel, lighting is required both day and night. The safety and comfort of tunnel driving are closely related to the lighting effect, which is directly determined by the brightness and color temperature of the light source. Studies have shown that the color temperature of the light source has different effects on the reaction time of the driver to detect the target under different brightness and visibility conditions. [0003] At present, there are three main problems in tunnel LED lighting: 1. The current...
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IPC IPC(8): H05B45/20H05B45/22H05B45/325
CPCH05B45/20H05B45/22H05B45/325
Inventor 张波李思琪丘东元张新斌魏佳北王兆延李敏臧继成邱念领李阿雷黄正荣廖一明许金双余循海谢家勇杨奎陈艳峰
Owner SOUTH CHINA UNIV OF TECH