What is the principle of Radar human proximity sensor and human recognition sensor

With the rapid development of science and technology, human body recognition sensor has gradually become the focus of attention. Among them, the radar human proximity sensor is a very advanced technology, it can detect the proximity of the human body, and can realize a variety of applications. This paper will introduce the principle, application scenario and difference between radar human body proximity sensor and human body recognition sensor.

First, the principle of radar human proximity sensor

Radar human proximity sensor is a kind of sensor that uses radar technology to detect the proximity distance of human body. It detects the distance between the human body and the sensor by transmitting radar signals and receiving the signals reflected back. When the human body approaches the sensor, the signal reflected back changes, which triggers the sensor's response.

Principle block diagram of radar human proximity sensor:

Radar human proximity sensors generally use microwave radar or millimeter wave radar as a signal source. Microwave radar generally uses frequencies above 24GHz, while millimeter wave radar uses wavelengths above 3mm. Because the radar signal has the ability to penetrate, this sensor can penetrate certain obstacles, such as glass, wood and so on.

Second, the application scenario of radar human proximity sensor

Radar human proximity sensors have a wide range of application scenarios, such as smart home, intelligent security, intelligent transportation and so on.

Smart home

In the field of smart homes, radar human proximity sensors can be used to detect the movements of family members. For example, a radar body proximity sensor could be installed in a bedroom to detect if a sleeping person is too far away from the bed or has stopped breathing. At the same time, this sensor can also be used in intelligent air conditioning, intelligent lighting and other systems to achieve automatic control and energy saving and emission reduction.

Intelligent security

In the field of smart security, radar human proximity sensors can be used to detect intruders. For example, radar human proximity sensors can be installed in the Windows or walls of buildings to detect if an intruder is approaching. At the same time, this sensor can also be used in police vehicles, police robots and other equipment to improve the police's rapid response ability and the ability to fight crime.

Intelligent transportation

In the field of intelligent transportation, radar human proximity sensors can be used to detect the distance between vehicles and pedestrians. For example, radar human proximity sensors can be installed on vehicles to detect the distance between vehicles and pedestrians, thereby avoiding collisions. At the same time, such sensors can also be used in autonomous driving systems to improve vehicle safety and comfort.

Third, the difference with the human body recognition sensor

A human body recognition sensor is a sensor that confirms identity by recognizing the biometric characteristics of the human body (such as fingerprints, faces, voices, etc.). Compared with radar human proximity sensor, human identification sensor has higher accuracy and reliability, but it needs the active cooperation of the identified person for identity verification. The radar human proximity sensor does not need the active cooperation of the identified person, and can detect the presence and distance information of the human body within a certain distance range. Therefore, the two have different application scenarios and advantages.

To sum up, the radar human proximity sensor is a very advanced technology, which can detect the proximity of the human body, and can realize a variety of applications. Although there are certain differences compared with human body recognition sensors, they have unique advantages and application prospects in their respective fields.