Intelligent LED Lighting in Parking Lots

Underground parking locations need continuous lighting, but for most of the time, when there is no pedestrian movement or vehicles traveling, continuous lighting causes energy waste, increased costs, and greater wear on the equipment, leading to lamps failing or expiring more often. In order to meet the requirements for a better lighting system that can save electricity and reduce maintenance costs, an intelligent lighting control system is the ideal choice.

Working Principle of LED Intelligent Lighting

The main design principle of LED parking lot intelligent lighting is based on “on-demand lighting”. When there is no vehicle movement all the lamps’ sensors record a dormant state, with the result that the light fixtures remain in low power operation, which will not only meet security and monitoring lighting requirements but also efficiently save energy consumption. 

When a vehicle or pedestrian enters the induction area, the sensor controller in the corresponding area will be activated and send a signal to the light fixtures. The LED light fixtures receive the signal and automatically adjust to the maximum brightness level. As long as there is vehicle or human activity sensed within in the induction area, the LED lamp fixtures remain at the highest level of brightness. After 30 seconds of no recorded activity (the time can be set and adjusted depending on your needs), for example after the car has departed, the lamp will revert to the dormant state.

principle of LED intelligent lighting

Microwave Sensor Control System

The system is designed utilizing the Doppler effect principle. Through the planar antenna transmitter and receiver circuit developed by iLUXZ, the sensor system is able to detect the surrounding electromagnetic environment intelligently and adjust the working conditions of the lamps automatically. 

The system is highly sensitive, reliable, safe and convenient. Products of this series are in-built with an integrated filter circuit, which can effectively suppress high-frequency harmonics and other interference that could clutter the sensors. The microwave sensing device is sensitive to metal substances when it is in use, therefore attention should be paid to avoid interference caused by metal surroundings. 

PIR Motion Sensor Control

The PIR motion sensor control, also known as the passive infrared sensor control system, is based on the principle of infrared emissions. The temperature of the human body is generally around 37 degrees and will usually emit infrared at a wavelength of 10μm. The infrared induction element detects infrared rays after they are enhanced by the fresnel lens. When the induction element, which has a special sensitivity to the 10μm wavelength, detects changes in the infrared spectrum of the observed areas, the LED lamp controller will automatically active the light fixtures, until such time as the human source has left the induction area. After a period of delay, the light source will automatically revert to the dormant state.

Voice Control System

The system works through a sensor probe, whose function is to detect and amplify the sound of the surrounding environment. After detecting a change against the background environmental noise, the follow-up circuit will trigger the work signal, which will automatically adjust the working state of the lighting fixtures. 

Light Control System

In the light control system, there is a filter inside the induction probe, which only allows the visible light spectrum to reach the light receiver. The light receiver will then make a judgment about the level of illumination of the environment and convert the light received into a signal to adjust the working state of the light fixtures. This allows for intelligent adjustment of lights depending on the local conditions and level of ambient light.

Inside the system, there is also an amplifier circuit with an adjustable amplifier that can change the light spectrum reception range. This enables it to adapt to different environmental illumination.

A light control system is a very effective lighting idea. However, for practical application, it is important when the lamps are installed the light sensor probe must avoid being irradiated by the light emitted by its own or any other nearby lamps. If this is not avoided, the sensor may misjudge local conditions and illuminate (or not) at inappropriate times, resulting in induction failure.

Advantages of LED intelligent lighting

By combining the LED parking intelligent control system and the LED lamp fixtures, the energy-saving advantages of LED lamps are enhanced. In addition to this, the intelligent lighting control system can be also connected with a BA system (building automation system), a monitoring alarm system, or a garage card system, to improve the efficiency and safety of LED parking lots operation. 

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