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A Closed-loop Feedback Control Method for Tunnel Lighting

A closed-loop feedback and control method technology, applied in lighting devices, energy-saving control technology, light sources, etc., can solve problems such as no passing vehicles, hindering traffic operations, and inability to meet real-time measurement, so as to avoid illumination attenuation, reduce traffic accidents, Optimizing the effect of safe operation

Inactive Publication Date: 2017-10-31
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The point-to-point measurement method is cumbersome, and there are no passing vehicles during the measurement process, which seriously hinders normal traffic operations
And point-to-point measurement of brightness (illuminance) can only measure brightness (illuminance) at regular intervals, which cannot meet the requirements of real-time measurement

Method used

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  • A Closed-loop Feedback Control Method for Tunnel Lighting
  • A Closed-loop Feedback Control Method for Tunnel Lighting
  • A Closed-loop Feedback Control Method for Tunnel Lighting

Examples

Experimental program
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Effect test

Embodiment

[0033] Embodiment: The specific implementation process of the above-mentioned closed-loop feedback control method for tunnel lighting is as follows:

[0034] S1. The luminance L outside the cave can be directly detected by the luminance meter, infrared detector, and coil vehicle detector. 20 (S), traffic flow, vehicle speed, information on whether the vehicle is available or not. Luminance values ​​are calculated from the collected information according to the specification.

[0035] S2. According to the road tunnel lighting design rules, the entrance section is divided into two lighting sections, and the corresponding brightness calculation formula is:

[0036]

[0037] Among them, k is the brightness reduction coefficient of the entrance section, and the value of k can be determined according to Table 4.1.1 in the "Detailed Design Rules for Highway Tunnel Lighting JTG / TD70 / 2-01-2014".

[0038] According to the highway tunnel lighting design rules, the transition section...

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Abstract

The invention discloses a tunnel lighting closed-loop feedback control method and system. The method includes the following steps that S1, brightness information, traffic flow information, vehicle speed information and vehicle existence information inside and outside a tunnel are collected; S2, according to the data information collected in S1 and road tunnel lighting design details, set brightness values needed for all road sections inside the tunnel are calculated; S3, an image of a road surface inside the tunnel is obtained through a camera, and actual illumination values of all points inside the tunnel and the illumination distribution condition of the whole road surface are calculated based on the grey scale of the image; S4, PID closed-loop feedback adjustment is performed according to the set brightness values and the actual illumination values, whether the actual output brightness of lamps inside the tunnel at the present meets the requirement or not is judged, if not, new brightness values are calculated, and the brightness values output after the PID closed-loop feedback adjustment are converted into control order information of brightness of the lamps inside the tunnel; S5, a dimming controller converts an order command signal of the brightness of the lamps into a corresponding pulse signal, and the output brightness values of the lamps inside the tunnel are adjusted through a PWM dimming mode.

Description

technical field [0001] The invention relates to the technical field of lighting control in tunnels, in particular to a closed-loop feedback control method and control system for tunnel lighting. Background technique [0002] The existing tunnel lighting control methods control the lamps in the tunnel to provide a certain brightness for the tunnel according to certain requirements. If the brightness does not meet the requirements, it cannot be measured in real time. [0003] Moreover, in the domestic road lighting industry, the measurement of road lighting is mainly for the measurement of brightness and illuminance. The traditional method of measuring brightness and illuminance is a point-to-point measurement method, which divides the measured road section into rectangular grids of a certain size. A hand-held luminance meter sequentially measures the luminance at the vertices of each grid. The point-to-point measurement method is cumbersome, and there are no passing vehicles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 董丽丽许文海秦莉
Owner DALIAN MARITIME UNIVERSITY
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