3D gesture recognition controller and method based on ultrasonic locating

Abstract

The invention discloses a 3D gesture recognition controller and method based on ultrasonic locating. The controller comprises a signal acquisition circuit and a locating and recognition unit. The method includes the steps that a background signal is collected and filtered; an ultrasonic wave transmission signal is colleted, collected data are filtered, and data obtained after the background signal is filtered are subtracted from filtered data; a direct signal and a reflected signal are intercepted, and maximum likelihood estimation is carried out on time delay between the direct signal and the reflected signal; ultrasonic wave signal propagation time is obtained through perpendicular incidence time and the delay time, the propagation distance of ultrasonic waves transmitted by a transmitting probe, reflected through a hand and received by a receiving probe is obtained according to the ultrasonic wave signal propagation time so as to obtain the position coordinates of gestures accordingly, and position coordinate data of standard gestures are collected and stored; the distances between samples in a table and the coordinates of all the standard gestures are calculated; whether the minimum distance between the samples in the table and the coordinates of the standard gestures is smaller than a set value or not is analyzed, if yes, a corresponding labeled gesture is output, and otherwise judgment is not made.

Description

technical field [0001] The invention relates to a 3D gesture recognition controller based on ultrasonic positioning and an implementation method thereof, which can be used for the control of household equipment in smart homes and the gesture control of industrial equipment, and can also be used as a human-machine interface. Background technique [0002] Smart home is the future development trend. Now the home devices used in smart home are mainly controlled by buttons, remote control and contact gesture recognition, which are characterized by the need to touch specific objects. With the increase of household equipment, the number of buttons and remote controls increases, and the number of operation modes that need to be memorized increases. At present, the solution of gesture recognition using ultrasonic positioning needs to have a transmitter or a receiver in the hand, which is controlled by contact gesture recognition. [0003] The mouse can measure the movement of the pl...

AI Technical Summary

Problems solved by technology

[0003] The mouse can measure the movement of the plane position and send out simple button signals, but the mouse needs to be controlled by hand, and a flat mouse pad is required; in this way, the mouse cannot be used for man-machine interface anytime and anywhere, such as it is difficult to use the mouse as a mouse in the kitchen or on the industrial site. man-machine interface

[0004] The vision-based gesture recognition method is simple and easy to implement, and the equipment cost is low. It belongs to non-contact gesture recognition, but the two-dimensional image has no depth information, and it is difficult to distinguish the hand and the background on the image.

If the three-dimensional scanning method is used, the system structure is complex and the amount of data is large, which is not suitable for running on small household equipment or industrial control equipment

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