1, infrared sensor headlamp working principle
The main device of infrared induction is the pyroelectric infrared sensor for human body. Human pyroelectric infrared sensor: the human body has a constant temperature, generally about 37 degrees, so it will emit a specific wavelength of about 10UM infrared, passive infrared probe is to detect the infrared emitted by the human body about 10UM and work. Infrared rays emitted by the human body of about 10UM are enhanced by the Fresnel lens filter and concentrated on the infrared sensor.
The infrared sensor usually uses a pyroelectric element, which loses the charge balance when the infrared radiation temperature of the human body changes, releases the charge outward, and the subsequent circuit can trigger the switch action after detection and processing. When someone enters the switch sensing range, the special sensor detects changes in the infrared spectrum of the human body, the switch automatically switches on the load, the person does not leave the sensing range, the switch will continue to switch on; After the person leaves or there is no action in the sensing area, the switch delay (TIME is adjustable: 5-120 seconds) automatically closes the load. Infrared induction switch induction Angle 120 degrees, 7-10 meters away, extended time can be adjusted.
2. Working principle of touch sensor headlamp
The principle of the touch sensor lamp is that the internal installation of the electronic touch ic forms a control loop with the electrode at the touch of the lamp.
When the human body touches the sensing electrode, the touch signal is transmitted to the touch sensing end by pulsating direct current to generate a pulse signal, and then the touch sensing end will send a trigger pulse signal to control the light; If you touch it again, the touch signal will be transmitted to the touch sensing end by pulsating direct current to generate a pulse signal, at this time the touch sensing end will stop sending a trigger pulse signal, when the AC is zero, the light will be naturally off. However, sometimes after the power failure or voltage instability will also have their own light up, if the touch reception signal sensitivity is excellent paper or cloth can also be controlled.
3, voice-controlled induction headlamp working principle
Sound is produced by vibration. Sound waves travel through the air, and if they encounter a solid, they will transmit this vibration to the solid. Voice-controlled components are such shock-sensitive substances that are switched on when there is sound (resistance becomes smaller) and disconnected when there is no sound (resistance becomes large). Then by making a delay between the circuit and the chip, the circuit can be extended for a period of time when there is sound.
4, the working principle of light induction lamp
The light sensor module first detects the intensity of the light and decides whether to standby and lock each module of the LED infrared sensor lamp. There are two scenarios:
During the day or when the light is strong, the optical induction module locks the infrared induction module and the delay switch module according to the induction value.
At night or when the light is dark, the optical sensor module will put the infrared sensor module and the delay switch module in the standby state according to the sensor value.
At this time, if a human body enters the induction range of the lamp, the infrared induction module will start and detect the signal, and the signal will trigger the delay switch module to open the LED infrared induction lamp. If the person continues to move within its range, the LED body sensor light will be on, when the person leaves its range, there is no infrared sensor 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.
Post time: Sep-05-2023