Ultrasonic focus based haptic feedback system and method

Abstract

The invention relates to an ultrasonic focus based haptic feedback system and method, and belongs to the field of haptic feedback. The system comprises a main control circuit, a hand position scanning circuit, a sensor array focus circuit and an ultrasonic sensor array. A hand position is obtained in a scanning mode by utilizing the ultrasonic array; a system determines ultrasonic focus points according to the hand position and calculates time delay of emitting ultrasonic waves by each sensor of the array to control a moment of emitting an ultrasonic signal by each sensor, thereby realizing the focus of the ultrasonic array; sound emission force is generated and acts on the hand skin to generate a haptic feeling; and the system needs to use a hand skin sensitive frequency to modulate an ultrasonic resonant frequency to generate an ultrasonic focus signal. According to the haptic feedback system and method, the scanning and haptic feedback of the hand position are realized through the same ultrasonic array, and a non-contact haptic feedback function in a three-dimensional space can be realized.

Description

technical field [0001] The present invention relates to a tactile feedback system and method, in particular to a tactile feedback system based on ultrasonic array focusing technology. The ultrasonic array obtains the position of the hand through scanning, and generates ultrasonic focus at the hand position by controlling the driving signal of the ultrasonic array. Acoustic emission force is formed, and the force acts on human hands to generate tactile sensation. The invention can be used in the fields of human-computer interaction, tactile interaction, three-dimensional image and video interactive control, and the like. Background technique [0002] For many years, people in the field of human-computer interaction mainly focus on vision and hearing, while ignoring other sensory modalities. With the dramatic improvement of computer performance, the limitations of computer interaction methods have become more and more prominent, and the research and application of other sensor...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a tactile feedback system and method based on ultrasonic focusing to solve the problems of small range of action, inconvenient operation, and single-point feedback in existing tactile feedback systems. It has hand position detection, non-contact tactile feedback, and multi-point tactile feedback. Feedback and other functions, the core of which is the three-dimensional ultrasonic array positioning and high-precision ultrasonic focusing technology

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