Radar sensors are conversion devices that transform microwave echo signals into electrical signals. They use wireless sensing technology to detect motion by figuring out the object’s position, shape, motion characteristics, and motion trajectory. Unlike other sensors, radar sensors aren’t affected by light and darkness and with the ability to detect obstructions like glass, it can “see” through walls. When compared to other sensor technology, like ultrasound, radar can sense longer distances and is safe for people and animals.

 

One of the biggest advantages radar sensors have over other sensors is its detection of motion and velocity. By detecting an object’s Doppler effect, or change in wave frequency, a radar sensor can compute that object’s speed along with its direction. They can also observe the target’s movement from different perspectives when using multi-channel sensors. Examining the movement from different perspectives in addition to previously collected measurements are used to determine complex movements.