Application of 360 degree resolution sensor technology in LED lighting

Introduction: the biggest difference between LED lighting and traditional lighting, LED lighting is a complete electronic products, while the traditional lighting fixture is only an electrical product. Therefore, LED lamps can be easily associated with various types of sensors, so as to achieve light control, infrared control and other automatic control functions. Such as LED street lamp automatic switch, with a photosensitive sensor can be simple to achieve; community night walkways and garden lighting, you can use infrared sensors to collect human activity information, automatic opening and closing lighting fixtures.

Application of 360 degree resolution sensor technology in LED lighting

Automatic control of LED lighting switch

The sensor device as a signal acquisition and electromechanical conversion, electromechanical technologies are quite mature, MEMS technology in recent years and sensor technology to miniaturization, intelligent, multi-functional, low cost strides forward. The sensitive sensors, infrared sensors and other types of and can be composed of an LED intelligent lighting control system, sensor to collect various physical signal into electrical signals through the integrated circuit of AD converter, MCU converter, DA signals collected for intelligent processing, so as to control LED lighting on and off. Human beings can set various control requirements on the MCU to control the switching time, brightness, color and color of the LED lamp, so as to achieve the goal of saving energy and saving energy. The current integrated circuit manufacturing technology has been able to AD, DA, MCU integrated in a 5X5mm or smaller package, installed in the lamp is neither occupied area and very convenient.

Photosensitive sensor and LED lamp combination

Wind power LED street lamp is a kind of highly intelligent and unmanned road lighting. It is very important to use wind energy and sunlight to generate electricity. The photosensitive sensor is an ideal electronic sensor which can control the automatic switching of the circuit due to the change of illumination at dawn and dusk. Photosensitive sensor photosensitive plate is very sensitive to light and dark brightness. Photosensitive sensor, according to the weather, time and area of automatic control of LED lighting fixtures. Reduce power consumption by reducing its output power during the bright day, compared with the use of fluorescent lights, the store area of 200m2 convenience stores can reduce the power consumption by 53%. Life is about 5 million 100 thousand hours. In general, LED lighting lamp life of 40 thousand hours; the color of light also can be used RGB colorful way to store light more colorful, more active atmosphere; compared with the original blue phosphor supporting the use of $LED, supporting the use of red, green and blue phosphor LED color of purple high.

Infrared sensor and LED lamp combination

The infrared sensor works by detecting the infrared emission from the human body. The main principle is: human emission around 10um infrared light through the filter lens to enhance Finel pyroelectric element PIR, when will launch position movement of infrared radiation changes, the element will lose the charge balance, heat release electric charge pyroelectric effect, infrared sensor (PIR) through the change of infrared radiant energy Finel filter lens into electrical signal, namely thermoelectric conversion. No movement of the human body in the detection area of passive infrared detector when the infrared sensor detects that the only background temperature, when the human body into the detection region, through the Finel lens, a pyroelectric infrared sensor detects the body temperature and temperature difference is the background, existing detection data signal acquisition and system comparison in order to determine whether someone is really an infrared source into the detection region.

Passive infrared sensor has three key components: Finel filter lens, pyroelectric infrared sensor (PIR) and matched low noise amplifier. Finel lens has two functions:

First, the focus of the role of the upcoming pyroelectric infrared signal refraction on the PIR;

The two is the detection zone is divided into a plurality of light and dark areas, into the moving object detection area (people) to the temperature change in the form of changes in the PIR pyroelectric infrared signal. The general will, a low noise amplifier, when the detector on the environmental temperature rise, especially close to the normal body temperature (37 DEG C), decreased the sensitivity of the sensor, through it to compensate the gain, increase its sensitivity. The output signal can be used to drive the electronic switch to realize the switch control of the LED lighting circuit. A E27 lamp standard screw lamp holder, its range of application of the power supply is AC180V-250V (50/60Hz), infrared sensor detection range is about 3M 15M, standard IFS-Bulb3W lamp products it is up to 80lm, 5W lamp 140lm. Embedded infrared sensor in the central part of the LED light source module. Once an infrared sensor detects a person's body temperature, the LED bulb will automatically turn on and off in 50 seconds. It is suitable for any kind of indoor applications, such as corridors, storage rooms, staircases and entrance hall.

The ultrasonic sensor, which is similar to the infrared sensor, has been used more and more in the automatic detection of moving objects in recent years. The ultrasonic sensor using the Doppler principle, more than the body can emit high frequency ultrasonic sensing outwards through the crystal, typically with 25 ~ 40kHz wave, then the control module detects the reflected wave frequency, if the region is in motion, the frequency of reflection will be a slight fluctuation, the Doppler effect, in order to determine the moving objects the lighting area, so as to achieve the purpose of control switch.

The longitudinal oscillation properties of ultrasonic wave can propagate in gas, liquid and solid and the propagation speed is different; it has the phenomenon of refraction and reflection and transmission in the air of the low frequency, attenuation, and solid, liquid, low attenuation, spread far. Ultrasonic sensor is the use of these characteristics of ultrasound. The ultrasonic sensor has sensitive range, no visual blind spots, not affected by obstacles, this technology has been in business and security field is used for more than 25 years, has been proved to be the most effective method of detecting small moving objects. Therefore, the system can be controlled with LED lamps and lanterns. The ultrasonic sensor has high sensitivity, vibration, air ventilation heating and cooling system and surrounding space movement will produce false triggering of ultrasonic sensors, ultrasonic sensors, so the need for timely calibration.