Landscape LED lights are a highly intelligent unattended road lighting, the sensor package lights use wind energy, solar energy, battery storage, sensor bag lights, so automatic management of energy is very important. Photoelectric sensor for the sun, dark (sunrise, sunset) when the light changes can control the circuit automatically switch the electronic sensor.
Light sensor, according to the weather, time and area of automatic control, shopping mall LED lights open and close. In the bright days, by reducing its output power to reduce power consumption, compared with the use of fluorescent lamps, 200 square meters of convenience stores can reduce the maximum power consumption by 53%. Sensor bag life of up to 5 - 10 million hours. Under normal circumstances, LED lighting life of 40,000 hours or so; bright colors can also be used to change the color of RGB, the shopping center is more colorful, more active atmosphere; and support the use of phosphor blue than red, green, fluorescent purple The color is higher.
Infrared sensor is used to detect the human body to launch infrared and work. The main principles of the body are: through the Fresnel filter to start about 10 infrared, enhance the PIR thermoelectric elements, when the body's infrared radiation emission position will change, the sensor package will lose charge balance (PIR) will be infrared radiation energy through Fresnel Filter into the electronic signal, that is, the sensor package lights, that is, thermoelectric conversion. Passive infrared detector detection area no one, infrared sensor sensor is only the background temperature, when the human body into the detection area, through the Fresnel lens, pyroelectric infrared sensor is the body temperature and background temperature difference, the sensor packaging signal acquisition signal, the detection data to find The system determines whether someone is really and other infrared sources into the detection area.
Passive infrared sensors have three key components: Fresnel filter, pyroelectric infrared sensor (PIR) and matching low noise amplifier. Fresnel lens has two effects: First, the light sensor bag concerned about the role of PIR pyroelectric infrared signal refraction: Second, the detection area is divided into multiple shaded areas, so the detection area moving object (person) can change the pyrolysis The infrared signal changes the form of PIR. In general, low noise amplifiers match. When the ambient temperature on the detector rises, especially when approaching the body's normal body temperature (37 ° C), the sensitivity of the sensor package light sensor is reduced and compensated to increase its sensitivity. The output signal can be used to drive the electronic switch to realize the LED lighting circuit switching control. Figure 5 for the infrared sensor appearance, infrared sensor internal structure and internal circuit diagram. Sensor bag light source infrared sensor LED lighting, is E27 standard nut light, ac180v - 250v (50 / 60Hz) power supply, infrared sensor detection range of about 3 m - 15m, the standard product ifs - light bulb 3W lights to 80 lm, 5W lights up 140 lm. The infrared sensor is embedded in the center of the LED light source module. Once the infrared sensor detects body temperature, the sensor bag LED bulb will automatically turn on and off within 50 seconds.
Infrared sensor has a similar application, in recent years in the automatic detection of moving objects have been more applications. Ultrasonic sensor is mainly the use of Doppler principle, through the crystal outward launch more than human perception of high-frequency ultrasound, 25 ~ 40 khz general selection wave, and then control the module to detect the frequency of the reflected wave, the sensor bag if the regional movement of the frequency There will be a slight fluctuation, that is, the sensor package has a Doppler effect, in order to determine the sensor package light to illuminate the moving object area to achieve the purpose of controlling the switch.