Multi-user human-computer interaction method based on millimeter waves

Abstract

The invention provides a multi-user human-computer interaction method based on millimeter waves. According to the multi-user human-computer interaction method, a millimeter-wave radar chip, a single micro transmitting antenna and a plurality of micro receiving antennas are embedded in a computer screen side, the transmitting antenna is used for transmitting a millimeter-wave signal in a specific range in front of a screen, and when encountering an obstacle, the millimeter-wave signal can be reflected to the receiving antennas. By calculating the time difference and frequency difference between signal transmitting and signal receiving, the distance and relative motion speed between the hands of a current user and the computer screen can be obtained. By comparing phase differences among all the receiving antennas, the arrival angle of each user is calculated, and in combination with the user distances, the spatial location of each user can be obtained. According to spatial location of each user, different users can be distinguished. Finally, distance and speed information of each user are enabled to be in one-to-one correspondence with a gesture of the user so that multi-user human-computer interaction based on the millimeter waves can be achieved. Compared with a technology based on optical stereoscopic imaging, the multi-user human-computer interaction method based on the millimeter waves is low in complexity and power consumption.

Description

Technical field

[0001] The invention relates to the technical field of millimeter wave radar, gesture recognition technology and human-computer interaction technology. Background technique

[0002] The development of millimeter-wave radar started in the 1940s. In the 1950s, millimeter-wave radars (working wavelength of about 8 mm) for airport traffic control and marine navigation appeared, showing the advantages of high resolution, high accuracy, and small antenna aperture. However, due to technical difficulties, the development of millimeter wave radar was once restricted. These technical difficulties are mainly: as the operating frequency increases, the output power and efficiency of the power source decreases, and the receiver mixer and transmission line losses increase. After the mid-1970s, millimeter wave technology has made great progress, and some better power sources have been successfully developed: solid-state devices such as avalanche tubes and Gunn oscillators; ther...

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