Stroboscopic illumination control system for elevator car and control method thereof

Abstract

The invention discloses a stroboscopic illumination control system for an elevator car, which comprises an elevator car, an illumination apparatus in the elevator car, a monitoring apparatus in the elevator car and a stroboscopic control apparatus. The stroboscopic control apparatus is connected with the monitoring apparatus and acquires a video signal output by the monitoring apparatus, and is also connected with the illumination apparatus and controls to turn on / off the illumination apparatus. The invention also discloses an illumination control method of the system, which comprises the following steps: 1, the stroboscopic control apparatus acquires a shutter signal output by the monitoring apparatus; 2, if no shutter signal is output, the stroboscopic control apparatus acquires a field synchronization signal and / or parity field signal output by the monitoring apparatus to obtain the shutter on / off time point of the monitoring apparatus; and 3, the stroboscopic control apparatus controls to turn on / off the illumination apparatus according to the shutter on / off of the monitoring apparatus. The invention is conducive to reduction of the energy consumption of the illumination apparatus in the car, prolonging of the service life of the illumination apparatus in the car and improvement of the definition during single-frame analysis of the monitored image on the premise of meeting the illumination requirements of the monitoring apparatus in the car.

Description

technical field [0001] The invention relates to a lighting control system and a control method for an elevator car. Background technique [0002] There are usually lighting and monitoring equipment in the elevator car. Typical lighting devices, such as LED lights, provide lighting for the interior of the elevator car. A typical monitoring device is, for example, a camera, which outputs a monitoring video signal inside the car through a cable for real-time display and / or storage device recording by the monitoring device outside the elevator car. Among them, the lighting equipment includes normal lighting equipment powered by the grid and emergency lighting equipment powered by batteries. When the power grid is cut off, the emergency lighting equipment will automatically start to provide emergency lighting for a period of time in the elevator car through the backup battery. [0003] In the case of normal power supply from the grid, the elevator car usually has two states: r...

AI Technical Summary

Problems solved by technology

The first control method is to turn off the lighting equipment or maintain it with a weak light source, which can maximize energy saving, but it cannot meet the lighting requirements of the monitoring equipment in the car, resulting in unrecognizable monitoring video information in the car

The second control method, the lighting equipment is still illuminated normally, which can meet the lighting needs of the monitoring equipment in the car, but it does not meet the energy saving requirements, and also reduces the service life of the lighting equipment

Since the personnel are moving in the car, the shutter speed is too low, so the facial features of the personnel cannot be clearly recognized when performing single-frame analysis (that is, identifying information in a single-frame image, such as a human face, etc.) on the monitoring screen. So the shutter speed must be increased

However, when the shutter speed is increased, the illuminance of the car may not meet the requirements of a higher shutter speed, so it is often necessary to increase the illuminance of the car, but too high illuminance will cause discomfort to passengers

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