Sensing light is suitable for installation where the sensor light illuminates the dark night

The appearance of sensor lights has greatly facilitated people's lives and at the same time made significant contributions to saving energy. In places where there is no need for constant light, the sensor light satisfies lighting requirements very well. Common sensor lights mainly include sound control, touch, infrared, and light induction. Do you know the working principle of sensor lights ? Where are the sensor lights suitable?

One, four kinds of common induction lamp working principle

1, infrared sensor light works

The main infrared sensing device is a human pyroelectric infrared sensor.

Human body pyroelectric infrared sensor: The human body has a constant body temperature, usually around 37 degrees, so it will emit infrared light with a specific wavelength of about 10 um. The passive infrared probe is to detect the human body's emission of about 10 um of infrared light to work. About 10 um of infrared radiation emitted by the human body is enhanced by the Fresnel lens filter and collected on the infrared induction source.

Infrared sensors usually use pyroelectric elements. When the infrared radiation temperature of the human body changes, the device loses charge balance and releases charge. The subsequent circuit can trigger the switching action after detection and processing. When someone enters the switch sensing range, the special sensor detects the change of the infrared spectrum of the human body, the switch automatically turns on the load, the person does not leave the sensing range, the switch will continue to be connected; after the person leaves or does not act in the sensing area, the switch delays (Time adjustable TIME: 5-120 seconds) Automatically turn off the load. Infrared sensor switch sensing angle 120 degrees, distance 7-10 meters, adjustable delay time.

2, touch sensor lights work

The principle of touch-sensing light is to form a control loop for the internally mounted electronic touch ic and the electrodes at the touch of the lamp.

When the human body touches the sensing electrode plate, the touch signal is sent to the touch sensing end by pulsed DC generation and a pulse signal is sent to the touch sensing end, and then the touch sensing end sends out a trigger pulse signal to control the lighting; if it is touched once, the touch signal is A pulse signal will be generated by the pulsed DC power and sent to the touch sensing end. At this time, the touch sensing end will stop sending the trigger pulse signal. When the AC power crosses zero, the lamp will naturally extinguish.

However, sometimes there may be self-illumination after a power outage or voltage instability. If the touch reception signal is very sensitive, paper or cloth can also be controlled.

3, voice-activated sensor works

The sound is generated by vibration. The sound wave propagates in the air. If it encounters a solid, it will propagate the vibration to the solid. A voice-activated component is a substance that is sensitive to vibrations. When there is a sound, it turns on (the resistance becomes smaller), and when there is no sound, it breaks (the resistance becomes very large). By delaying the circuit and the chip, the circuit can be turned on for a while when there is a sound.

4, light sensor works

The light sensing module first detects the intensity of the light and decides whether to hold and lock each module of the LED infrared sensor light. There are two situations:

(1) When the daytime or strong light is strong, the light sensing module locks the infrared sensing module and the delay switch module according to the sensing value.

(2) When the night or light is dark, the light sensing module puts the infrared sensing module and the time delay switch module on standby according to the sensing value.

At this time, if the human body enters the activity range of the luminaire, the infrared sensor module will start and detect the signal, and the signal triggers the delay switch module to turn on the LED infrared sensor lamp. If the person continues to be active in its range, the LED body sensor light will be always on. When the person leaves the area, there is no infrared sensing signal, and the delay switch automatically turns off the LED infrared sensor light within the time setting value. Each module goes back to standby and waits for the next cycle.

Second, where the sensor lamp is suitable for installation

1, corridor

Sensor lights are installed more in the corridor, sensor lights built-in light source and sensing devices, can achieve very good results, when people come to light, people go lights off. Generally installed in the corner of the stairwell, so that they can sense people upstairs and downstairs, and the sensor lamp has a long service life, low voltage, and frequent switches have no effect on it.

2, balcony

The balcony is usually incandescent or ceiling light, but sometimes forget to turn off the light, so installing a sensor light in this position can solve this problem, intelligent induction of the human body, when the people in the balcony activities when the light is often Bright, the lights will be automatically extinguished after the person leaves, which is convenient for power saving.

3, property corridor

It is very appropriate to install sensor lights on the property corridor so that whenever the owner returns home from the stairs, the sensor light will automatically light up. This will facilitate the owner to open the door and enter the house. After the person enters, the sensor light will automatically extinguish, compared with the light. Light bulbs, a lot of power.

4, utility room

The space between the sundries is small and dark. After the person enters the room, he may not find where the switch is. When he comes out, he must put down his hand and turn off the lights. This is very troublesome. If you install a sensor light, you can solve this problem very well. When you open the door, the light will automatically turn on. When the thing is found, it will go directly. After a few minutes, the light will automatically go out. Don't worry about nobody turning off the light.

5, toilet

Sensor lamp shell is plastic, not afraid of moisture, when the person in the bathroom, the light will always be bright, so when people go away, do not have to turn off their lights, automatically extinguished after a few minutes.

6, cabinets, wardrobes

Install sensor lights in cabinets and wardrobes, so you don't have to worry about opening the closet or cabinet. You can't find anything. The door opens and the door closes.

Editor's summary: The question of how the sensor light works and where it fits is presented here. Hopefully it will help everyone. Want to learn more related knowledge can focus on this site information.

Sensor light