According to the sensor activation method, the fully automatic sole cleaning machine can be divided into two categories: radar microwave induction and infrared induction. So which one is better, radar microwave induction fully automatic sole cleaning machine or infrared induction fully automatic sole cleaning machine?

To understand which is better, radar microwave sensing or infrared sensing, we must first know the working principles of both. Next, we will first understand the basic working principles of the two sensing modules from the working principle perspective.

Working principle of infrared sensor

The working principle of infrared sensors is mainly based on the physical effects of the interaction between infrared radiation and matter, which involves the following key steps:

• ‌Infrared radiation emission‌: The infrared transmitter in the infrared sensor emits infrared rays.
• ‌Infrared radiation reception‌: When infrared rays encounter an object, part of the light is reflected back and received by the infrared receiver.
• ‌Signal Conversion‌: The infrared receiver converts the received infrared radiation into electrical signals.
• ‌Signal processing‌: Amplify and filter the converted electrical signals and extract useful information from them.

In addition, the working principle of infrared sensors also involves physical phenomena such as thermoelectric effect, photoelectric effect and pyroelectric effect. These effects enable infrared sensors to measure parameters such as temperature, reflectivity, transmittance and emissivity of the target surface, thereby realizing the detection and identification of the target12.

Infrared sensors are widely used in smart home, security monitoring, temperature measurement and other fields, bringing convenience to people's life and work.

Working principle of Radar Microwave Sensor

• ‌Core Principle‌: Doppler Effect. Microwave sensors work using the Doppler principle of electromagnetic waves. When microwaves encounter a moving object, the frequency of the reflected wave will shift slightly. By detecting this frequency difference, the motion state of the object can be determined.
• Working process: Microwaves are radiated through the transmitting antenna and absorbed or reflected after colliding with the object being measured. The receiving antenna receives these microwaves and converts them into electrical signals. The electrical signals are processed by the measuring circuit to realize the detection of microwaves.
• Components: The microwave sensor is mainly composed of a microwave oscillator and a microwave antenna. The microwave oscillator generates an oscillation signal, which is transmitted through a waveguide and then emitted by a microwave antenna.
• ‌Application Mode‌: Microwave radar sensing mainly has two modes: CW (continuous wave) and FMCW (frequency modulated continuous wave).

Radar microwave sensors are widely used in smart homes, smart security and other fields due to their high sensitivity and ability to penetrate non-metallic materials.

* Infrared sensor: It has high sensitivity and can detect weak infrared radiation, which is suitable for night monitoring or low-light environment. It adopts non-contact measurement to avoid damage to the measured object, and has fast response, strong anti-interference ability and high cost-effectiveness. However, its sensing distance and angle are relatively small, and are greatly affected by the environment, temperature, dust, etc.

* Radar microwave sensor: It has a longer sensing distance, a wider angle, no dead zone, can penetrate non-metallic materials, and is not affected by the environment, temperature, dust, etc. It has stable performance. It is suitable for large spaces or places with obstacles, such as parking lots. Radar microwave sensors can also detect human body micro-movements and static states to achieve more accurate sensing control.

‌Radar microwave sensing is better. ‌Radar microwave sensing is superior to infrared sensing in many aspects, especially in terms of sensing distance, environmental adaptability, sensitivity and application scenarios. First of all, in terms of sensing distance and sensitivity, radar microwave sensing has a longer sensing distance, usually between 3 and 7 meters, and reacts quickly, can penetrate glass and thin wood, and is not affected by the environment, temperature, dust, etc. In contrast, the sensing distance of infrared sensing is shorter, generally around 3 meters, and is easily affected by factors such as ambient temperature, and there is limited room for sensitivity improvement. ‌ Secondly, in terms of environmental influences, radar microwave sensing technology is not affected by temperature, brightness, humidity and light fluctuations, and can work stably in various environments. Infrared sensing is easily interfered by heat sources and light sources, and detection and sensitivity will be significantly reduced when the ambient temperature is close to human body temperature. ‌ Finally, from the perspective of application scenarios, radar microwave sensing is suitable for places that require long-distance sensing and high sensitivity, such as underground parking lots, staircase corridors, etc. Infrared sensing is more suitable for scenes with low distance requirements such as aisle lighting due to its short sensing distance and easy environmental impact. ‌

The fully automatic sole cleaning machine is placed in various places with complex environments and people wear colorful clothes. Therefore, through comparison of various functions, the radar microwave sensor fully automatic sole cleaning machine is better than the infrared sensor fully automatic sole cleaning machine. Regardless of whether the staff wears black pants or there is reflective interference in the venue, the startup of the radar microwave sensor fully automatic sole cleaning machine will not be affected, which can ensure that the equipment can work normally in various environments.