Radar is a kind of sensing equipment that senses the presence of objects by transmitting and receiving microwaves

Radar is a kind of sensing equipment that senses the presence of objects by transmitting and receiving microwaves, and then obtains motion speed, distance, Angle, direction and other parameters. Radar is widely used in intelligent household appliances, intelligent lighting, intelligent pension, intelligent office and other fields, with high precision, small size, low power consumption, strong anti-interference ability and other advantages.

Working principle

1. Based on the principle of Doppler effect, CW radar sensor supports range and speed detection of multiple targets. It transmits microwave signals to a given target, then analyzes the frequency change of the reflected signal, the difference between the transmitted frequency and the reflected frequency, and accurately measures the speed of the target's movement relative to the radar.

2. FMCW radar sensor is a kind of frequency-modulated continuous wave. Its basic principle is that the transmitted wave is a high-frequency continuous wave, and its frequency changes with time. In short, it sends a wireless wave (radar wave), then it takes the wave back, and measures the location data of the target based on the time difference between sending and receiving.

Radar human presence Detection sensor 24GHz radar sensor applications

1. Smart home

The radar human body has perceptual linkage, and other intelligent devices carry out scene interaction. When you come home from work, the lights will automatically turn on, the TV will automatically turn on, the curtains will slowly open, the air conditioning will automatically turn on. At this time, we can enjoy the smart life brought by smart devices.

2. Smart office

Based on multi-target detection, the presence of the radar human body can control the illuminated area of the office. For areas where no one is present, the presence of the radar body can control the lights to go out. The lights go on when someone's presence is detected.

3. Fall detection

The presence of the radar body can detect a fall. By comparing the parameters before and after the target, you can tell if the person is falling. If a fall is detected, an alarm message is immediately sent to the mobile phone to inform children or elderly people in the community that they have fallen.

4, Motion speed measurement

Radar human body detection can be used to develop sports speed measurement products, accurately measure the speed of golf ball speed meter, baseball speed meter, ice hockey speed meter and other people or objects, to a certain extent to meet the needs of sports products speed measurement.

5, Automatic gate induction

In the road gate radar, radar human presence monitoring has been widely used, accurate perception of the existence of human body, but also has anti-smash function, less affected by external environmental factors.