Safe and energy-saving control method of tunnel ventilation lighting system

Abstract

The invention discloses a safe and energy-saving control method of a tunnel ventilation lighting system. The method comprises the following steps that 1) a control center acquires values of visibility, toxic gas concentration and brightness; 2) the control center judges whether the concentration of the toxic gas is normal or not, and the fan works in a half-power operation state when the concentration is abnormal; 3) determining a relational expression between visibility and visual contrast according to the brightness; 4) defining low, medium and high levels of visibility of each section of the tunnel according to the relational expression, and judging the level to which the current visibility belongs; when the visibility is at a low level, the fan works in a full-power operation state; when the visibility is at the middle level, the illumination brightness L is increased to L1; when the visibility is at a high level, the current illumination brightness and the fan state are kept unchanged; and 5) the control center judges the state of the draught fan according to the concentration and visibility of the toxic gas and controls the closing moment of the draught fan. On the premise that the visual contrast ratio is kept at the high level, the effects of safety and energy conservation are achieved.

Description

technical field [0001] The invention relates to the technical field of highway tunnel ventilation and lighting, in particular to a safety and energy-saving control method for a tunnel ventilation and lighting system. Background technique [0002] When the car is running, it often emits a large amount of exhaust gas and brings up a large amount of smoke and dust, resulting in an increase in the concentration of smoke and dust and a decrease in visibility. This phenomenon is especially obvious in tunnels as relatively sealed spaces. With the increase of smoke concentration and the decrease of visibility level, if corresponding countermeasures are not taken, it is very likely that the driver's visual contrast will be lower than the visual contrast threshold, which will eventually affect the driving safety of the driver. [0003] In the existing technical solutions, the way of setting visibility detectors and fans in the tunnel is often adopted, and the visibility is maintained...

AI Technical Summary

Problems solved by technology

[0004] 1. It is impossible to ensure whether the visual contrast in the tunnel is higher than the visual contrast threshold

[0005] 2. Improving the visual contrast in the tunnel only by controlling the ventilation will lead to increased system loss and cannot achieve effective energy saving

[0006] 3. Does not take into account that visibility affects visual contrast differently at different brightness levels

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