Intelligent LED lighting systems using in underground parking lots is a complex combination of advanced digital technique, electronic sensors, wireless technology, signal sampling, central control, LED displays and LED Lights products. It is a brand new intelligent lighting system which can provide sufficient brightness according to the position of carports. The central system will “judge” by itself at what time to switch on lamps. Electronic sensors were installed at some points in advance, covering the enter region. When sensing cars, sensors will trigger adjacent lamps to provide light for them. At the rest of time, these lamps remain in the condition of dormancy. This kind of design can dramatically reduce the energy consumption. Meanwhile, light intensity sensors installed at every carport can automatically adjust lamps for this carport by “judging the nearby brightness”. Within the entire intelligent lighting system, LED technique is just a small but very important part. In order to fully realize the green concept, designers decided to use the most environmental friendly lighting technique at the moment: LED.
Intelligent LED lighting systems was composed of four main sections: central control system, data sampling sensor group, guiding system and LED lamps.
Central control system used the most advanced ARM9 2440 series, 400MHz frequency, having more than 130 multi-function I/O ports, 24 external interrupt resources and several popular peripheral interfaces.
Occupancy sensors, voice-activated sensors, microwave sensors, ultrasonic sensors and ambient illumination sensors constitute the entire data sampling sensor group. These sensors are normally installed on the top of each carport. Among them, ultrasonic sensors play an important role in sensing cars movement.
Guiding system is actually a series of instruction set which has been embedded into CPU in advance. After collecting enough information from data sampling sensor group, guiding system will search the nearest vacancy from built-in database and transmit the corresponding information to drivers though broadcast or other indicative marks. Guiding system is a daring design of intelligent LED lighting systems. It has nothing to do with green concept but, to a large extent, realize the complete replacement of labor with computers.
LED lamps are controlled by lamp triggers mounted inside of walls. This part is the terminal of the entire intelligent lighting system and also a user interface.
Intelligent LED lighting systems were well received after launch. Experts indicated that more and more intelligent LED lighting products applications should be and will be developed and finally into our daily lives.