Millimeter-wave radar sensors enable the hood gesture scanning sensing

Infrared, ultrasonic, camera, and other sensors can be used for gesture scanning perception (and voice control), and millimeter-wave radar sensors are also gradually exploring a number of emerging areas to expand the viability of radar sensors. Gesture scanning sensing in hoods, although niche, also has room for survival.
 
Most of the researchers only consider the definition and recognition rate of gesture actions, while few of them consider the effect of human motion on the accuracy of gesture recognition. Human motion and gesture actions are difficult to distinguish in 24G radar with low resolution. Some schemes are to limit the sensing distance of human gestures, such as limiting it to 40 cm, only gestures within 40 cm are detected, and at the same time require that the human body can not be close. But this approach is hardly acceptable for hood sensing and most other gesture recognition applications.

Low-cost radar sensors mainly detect the motion of the gesture, such as forward, backward, left, right, up, down, drawing circles, etc., and the gestures must be dynamic (not considering ISAR imaging). Its outputs are the distance, speed, angle, and power of the gesture changes over a period of time, and their correlation of these information.