What is Human Presence Sensing Technology?

Human presence sensing technology is a technology that can detect the presence of the human body by sensing infrared rays or other signals emitted by the human body to determine whether someone is present. This technology is widely used in smart homes, security systems, automatic lighting and other fields, greatly improving the convenience and safety of life.

Working Principle of Human Presence Sensor

Human presence sensor mainly detects the presence of human body through infrared sensor (PIR). When the human body moves, it emits infrared rays of specific wavelengths, and the sensor captures these changes and triggers the appropriate circuit or system. In addition, some advanced human presence sensors incorporate microwave or ultrasonic technology to improve the accuracy and range of detection.

Applications of Human Presence Sensor Technology

In the field of smart home, human presence sensor technology can be used to automatically control lighting, air conditioning, and other equipment by automatically turning on the equipment when someone is detected entering the room and turning it off when no one is present, thus realizing energy saving. In the field of security, it can be used for intrusion detection, where the system issues an alarm when an unauthorized person enters a specific area.

Frequently Asked Questions

Most PIR-based human presence sensors primarily detect a moving human body, as the infrared light emitted by a stationary human body does not vary significantly. However, some advanced sensors incorporate microwave or ultrasonic technology to detect stationary human bodies.

The false detection rate depends on the technology of the sensor and environmental factors. High quality sensors with proper installation and commissioning can reduce the false detection rate to a very low level. False detections can be reduced by avoiding installing sensors in areas with heat sources or strong direct sunlight.

Can human presence sensors detect a stationary human body?

Does human presence sensor technology have a high false detection rate?

Is human presence sensing technology harmful to the human body?

The infrared, microwave or ultrasonic waves used in human presence sensing technology are low-power and harmless to humans. These technologies have been used in a variety of residential and commercial applications with proven safety.