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Method of multi-finger positioning by use of low-frequency ultrasound

A multi-finger, ultrasound technology used in positioning, input/output of user/computer interaction, input/output process of data processing, etc.

Inactive Publication Date: 2016-12-14
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional human-computer interaction devices such as mice and keyboards have certain limitations in terms of naturalness and friendliness in use. Therefore, it is the current development trend to study interpersonal interaction technologies that conform to interpersonal communication habits and establish a harmonious and natural human interaction environment.

Method used

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  • Method of multi-finger positioning by use of low-frequency ultrasound
  • Method of multi-finger positioning by use of low-frequency ultrasound
  • Method of multi-finger positioning by use of low-frequency ultrasound

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specific Embodiment

[0043] Such as figure 1 As shown, a method for multi-finger positioning using low-frequency ultrasound disclosed in this embodiment, the components are set as follows: two ultrasonic transmitters A (002), B (003) and ultrasonic Receiver (001), so that the receiving point of the ultrasonic receiver (001) and the emitting points of the two ultrasonic transmitters A (002) and B (003) are not on the same straight line, and the ultrasonic transmitters are equipped in different positions of the hand , form an ultrasonic emitter group (004) that contains N ultrasonic emitters to be tested in positions altogether, in this example N=5, two ultrasonic emitters A (002), B (003) and B (003) and Ultrasonic receivers (001) are all connected to data processing and control equipment (005).

[0044] figure 2 , in the schematic diagram of the establishment of the coordinate system, the space Cartesian coordinate system of the right-hand system is established.

[0045] image 3 , in the sch...

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Abstract

The invention discloses a method of multi-finger positioning by use of low-frequency ultrasound, comprising the following steps: a corresponding coordinate system is built according to the positions of two ultrasonic transmitters and an ultrasonic receiver of which the positions are fixed; the basis parameters of a computing device are measured; ultrasonic transmitters of different frequencies are arranged in different positions of a hand to form an ultrasonic transmitter group of which the position is to be measured; the ultrasonic transmitter group of which the position is to be measured transmits ultrasound, and the ultrasonic receiver carries out sampling and fits the sampling data in a sinusoidal mode to get amplitude and phase information; the two position-fixed ultrasonic transmitters and the ultrasonic transmitter group of which the position is to be measured transmit same-frequency ultrasound at the same time for sound wave interference, and the ultrasonic receiver carries out sampling and fits the sampling data to get amplitude and phase information; and the position coordinate of each ultrasonic transmitter in the ultrasonic transmitter group of which the position is to be measured is obtained through data processing, and thus, finger positioning is realized.

Description

technical field [0001] The invention belongs to the field of acoustics and signal processing, in particular to a method for multi-finger positioning by using low-frequency ultrasound. Background technique [0002] With the rapid development of computer technology, the interaction between human and computer has gradually become an important part of people's daily life. Traditional human-computer interaction devices such as mice and keyboards have certain limitations in terms of naturalness and friendliness. Therefore, it is the current development trend to study interpersonal interaction technologies that conform to interpersonal communication habits and establish a harmonious and natural human interaction environment. Gesture is a natural and intuitive way of interaction, which expresses rich and convenient meanings. Therefore, gesture recognition is a research hotspot in current human interaction. [0003] Gesture is a natural, intuitive and easy-to-learn means of human-co...

Claims

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Application Information

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IPC IPC(8): G01S5/18G06F3/01
CPCG06F3/017G01S5/18
Inventor 袁杰马翔叶濛梁澄宇罗鸣威
Owner NANJING UNIV