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Fingertip positioning system and method

A positioning system and finger technology, applied in the field of ultrasonic gesture recognition, can solve problems such as unusable, weak reflected signals, and difficulty in realizing long-distance fingertip positioning, and achieve the effect of expanding the application range

Active Publication Date: 2015-09-30
AAC TECH NANJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the reflective surface of the fingertip is relatively small, the reflected signal may be too weak to be used for fingertip positioning when the finger is far away, so the above-mentioned ultrasonic gesture recognition scheme is difficult to achieve long-distance fingertip positioning. Its scope of application is limited

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  • Fingertip positioning system and method

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] In order to solve the problem that the current ultrasonic gesture recognition scheme cannot perform long-distance fingertip positioning, the present invention provides a fingertip positioning method and system that can realize long-distance positioning. For ease of understanding, the technical principle of the solution provided by the present invention will be briefly introduced below.

[0030] see figure 1 , which is a schematic diagram of gesture sha...

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Abstract

The invention provides a fingertip positioning system and method. The fingertip positioning system comprises a first ultrasound transmitting device, a second ultrasound transmitting device, an ultrasound receiving device array, a fingertip reflection peak detection module, a fingertip and fist face reflection path extraction module, a fingerprint length extraction module, a fist face reflection path extraction module, a fingertip reflection path estimation module, a finger column surface reflection path extraction module and a fingertip coordinate calculation module. According to the fingertip positioning system and method provided by the invention, far-distance finger fingertip positioning with non-contact type operation can be realized.

Description

technical field [0001] The invention relates to ultrasonic gesture recognition technology, in particular to a fingertip positioning system and method. Background technique [0002] Ultrasonic gesture recognition technology is a scheme that uses ultrasonic signals to identify the motion state of human hands (such as position, speed, trajectory), and is mainly used in smart devices to realize non-contact human-computer interaction. User operations usually use the user's fingertip as a reference point, so precise positioning of the fingertip is very important for a non-contact operation scheme. In an ultrasonic gesture recognition solution related to the present invention, the array of ultrasonic transmitters used to transmit ultrasonic signals all face the same dimension, and the ultrasonic receiver receives the ultrasonic signals emitted by the ultrasonic transmitters and reflects them on the fingertips to form a reflection signal, the reflection signal can be used to locate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/46G01S15/06G01S15/58
Inventor 唐琪冯声振
Owner AAC TECH NANJING