The infrared sensing process of an automatic hand sanitizer involves the perception of infrared radiation, the working principle of the sensor, signal transmission and processing, and the final dispensing of hand sanitizer.

Sensing area design: Automatic sensing hand sanitizers have built-in infrared sensors, which are usually installed in the sensing area of the device, where the user reaches out. The sensing area is usually located around the hand sanitizer dispensing port to ensure that the sensor can accurately sense the user's hand movements.

Emission of infrared radiation: Human tissue produces infrared radiation, the magnitude of which is related to the temperature of the object. When a user reaches their hand toward the sensing area, the skin of their hand emits infrared radiation.

Working principle of infrared sensor: Infrared sensor is a device based on the photoelectric effect. When infrared radiation hits the sensor surface, the optoelectronic device generates a charge. This charge change is captured by the sensor and converted into an electrical signal.

Electrical Signal Transmission: The electrical signal generated by the sensor is transmitted to a processor inside the device. The transmission process is usually accomplished through wires or radio frequency signals, depending on the design and technical implementation of the device.

Signal Processing: The processor inside the device is a key component of the infrared sensing process. After the processor receives the electrical signal sent by the sensor, it analyzes and processes the signal through the built-in algorithm.

User hand movement analysis: The processor uses a pre-designed algorithm to analyze the electrical signals to determine the characteristics of the user's hand movements. This analysis process aims to eliminate the influence of ambient light and other irrelevant factors to ensure high-precision perception of the user's hand movements.

Action confirmation: The processor uses an algorithm to confirm whether the user's hand movements meet the set conditions, that is, whether it indicates that the user intends to wash hands. This step is to prevent false triggering and ensure that the system only responds to valid hand movements.

Hand sanitizer dispensing trigger: Once the user's hand movement is confirmed to be valid, the processor will trigger the hand sanitizer dispensing system. This may involve mechanical devices, electronic valves, etc., to achieve automatic release of hand sanitizer.