Local ultrasonic sensor array focusing method based on multi-array synthetic aperture

Abstract

The invention provides a local ultrasonic sensor array focusing method based on a multi-array synthetic aperture, and belongs to the technical field of human-computer interaction and virtual reality.The calculation unit receives the focus point coordinates sent by the upper computer, calculates the delay time of each channel driving signal on the combined ultrasonic sensor array and quantifies the delay time; the calculation unit generates a system clock and a system focusing signal of the control unit, and sends the system clock, the system focusing signal, the delay data and the sensor state signal to the control unit; the control unit sets a channel counter according to the received delay data and the sensor state signal, and uses the counter to complete delay control of each channel driving signal; the control unit generates an ultrasonic sensor driving signal and amplifies the ultrasonic sensor driving signal. Local ultrasonic focusing of the large-aperture array is achieved, user experience close to reality is generated by controlling a focusing point when physical contact or physical conditions do not exist, and the method is used for the fields of human-computer interaction, virtual reality, augmented reality and the like.

Description

technical field [0001] The invention belongs to the technical fields of human-computer interaction and virtual reality, and in particular relates to an aerial ultrasonic focusing method, which realizes local control and aerial focusing of multiple ultrasonic sensor arrays. Background technique [0002] With the development of human-computer interaction technology, various human-centered, efficient and natural human-computer interaction methods have emerged. At the same time, various sensory feedbacks in the process of human-computer interaction have also developed. [0003] During the interaction process, users often need various sensory feedbacks to guide operations or enhance user experience. With the development of science and technology, human-computer interaction is gradually transitioning from plane interaction to three-dimensional space interaction. In 3D human-computer interaction, with the maturity of visual and auditory feedback technology, tactile feedback has be...

AI Technical Summary

Problems solved by technology

[0009] The invention provides a local ultrasonic sensor array focusing method based on multi-array synthetic apertures to solve the problem that all the sensors on the ultrasonic array work all the time, resulting in waste of resources and energy, increasing the noise of the system, and processing large ultrasonic sensor arrays. Difficult, poor flexibility, poor storage

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