In recent years, with the development of microelectronics technology, small and smart sensors continue to emerge. At present, four behavior recognition technologies based on computer vision, sensors, location, and character interaction can meet behavior recognition in specific scenarios to a certain extent. Needs, but the abnormal behavior of the actor cannot be detected without video or image technology. Let's talk about sensors based on ultrasonic human behavior detection.
Ultrasonic sensors use the vibration of the pressure-vibrating ceramic on the sensor head to generate high-frequency sound waves that are inaudible to human ears. If the sound waves hit an object, the sensor can receive the return wave. The sensor can determine the distance of the object by the wavelength of the sound wave and the time difference between the transmitted sound wave and the time it receives the return sound wave. According to this principle, the ultrasonic human body detection sensor mainly uses the distance reflected by the person after the sound wave is emitted. When the human body moves, the detected distance will change, and based on this, it is judged that someone is moving.
OSENON Ultrasonic Human Body Detection Sensor-a proximity sensor specially designed for high and low level alarm signal output, with a measurable range of 3 meters or more, suitable for pedestrian detection, parking detection, etc. When a pedestrian enters the detection range, the sensor will output an alarm signal from low level to high level. At the same time, it also has the function of outputting the specific distance of the target, and outputting distance data through RS485 or 232. Therefore, OSENON ultrasonic sensor is a very low-cost human body detection ultrasonic sensor.
The shortest detection distance of the sensor
The sensor can detect proximity information as the area starts from 5mm from the front of the sensor to the edge of the detection area. For the distance information provided on the serial output of the sensor, the minimum detection distance that can be reported. The blind zone can be very small, if you want to be "0", OSENON sensor also has a solution.
Function to determine specific location and behavior
OSENON sensors can perform positioning calculations for specific positions and directions of action through multiple sensors, and realize behavior detection through the synchronous design function.