Virtual force feedback interaction system and method based on myoelectricity evaluation

An interactive system and virtual force technology, applied in the field of virtual force feedback interactive system based on myoelectric evaluation, can solve problems such as poor contact, stop, inconsistent force, etc., to simplify the size of circuit devices, enhance immersion, and improve realism degree of effect

Active Publication Date: 2020-09-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, VR devices at home and abroad mainly have the following three deficiencies in the realization of force feedback interaction: 1. The development of interactive feedback technology that integrates vision and hearing is relatively mature, but in vision, haptic, and even visual, auditory, and haptic The interactive feedback technology of fusion processing needs to be improved urgently; Second, the realization of force feedback is mainly through traditional sensor vibration body surface or through mechanical structure to transmit force. In the "powerful"

Method used

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  • Virtual force feedback interaction system and method based on myoelectricity evaluation
  • Virtual force feedback interaction system and method based on myoelectricity evaluation
  • Virtual force feedback interaction system and method based on myoelectricity evaluation

Examples

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Example Embodiment

[0025] Example

[0026] Such as figure 1 The present invention includes an electrode or electrode array unit, an initial parameter generation unit, an electromyography signal acquisition module, an electrical stimulation module, a time division multiplexing module and an electromyography signal-force regression model processing unit. The initial parameter generation unit and the EMG signal-force regression model processing unit can be set in a local computer, a server or a VR device.

[0027] In this embodiment, the electrode or electrode array unit (also called electrode sensor) is a flexible fabric electrode array attached to multiple positions on the human skin surface (such as the surface of the biceps brachii muscle and the triceps brachii muscle). The fabric electrode array is embedded in the cloth base, and is wound on the human muscles with the cloth as a support, and can be made into an armband and worn on the arm. The electrode or electrode array unit is connected to the...

Example Embodiment

[0051] Example 1. The flexible electrode sensors are made into arm rings, and they are symmetrically placed on the biceps, triceps, and latissimus dorsi of the left and right arms. The electrode sensors at the biceps are used for To collect EMG signals, the electrode sensor at the triceps brachii muscle performs electrical stimulation to provide the downward gravity of the virtual object, and the electrode sensor at the latissimus dorsi muscle also performs electrical stimulation to generate the force of the virtual object to open the opponent. . When the human body holds objects of different weights, the biceps of the arm contract and produce a sense of force. In this process, a dynamometer can be used to replace objects with different forces. It is easy to measure the corresponding force when the human body actively contracts the muscles. When the force generated by the biceps is upward. A large amount of EMG signals are collected through flexible electrode sensors, and an E...

Example Embodiment

[0052] Example 2 The process is similar to that of Example 1. A dynamometer can be used to replace objects with different forces. It is easy to measure the force generated by the human triceps. The force is downward, and the EMG signal-force regression model is established. A corresponding shooting scene is established in the virtual scene. When the user presses the pistol, the pistol will produce a certain recoil to the human body, and the magnitude of the recoil can be preset. In order to simulate the recoil of the pistol, the electrical stimulation module outputs electrical stimulation signals to stimulate the biceps brachii of the human body, and the forearm is involuntarily lifted up. In order to experience the pressure gun, the human body's triceps muscles will actively contract and prevent the arms from lifting up. At this time, the force generated by the triceps muscles is the recoil force. Calibrate the electrical stimulation module to output a new electrical stimulati...

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PUM

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Abstract

The invention relates to a virtual reality interaction technology, in particular to a virtual force feedback interaction system and method based on myoelectricity evaluation. The system comprises an electrode sensor, an initial parameter generation unit, an electromyographic signal acquisition module, an electrical stimulation module, a time division multiplexing module and an electromyographic signal-force regression model processing unit, a virtual interaction event triggers an initial parameter generation unit to generate an initial electrical stimulation signal parameter, and an initial electrical stimulation signal is sent to an electrode sensor to stimulate muscle passive contraction to generate passive force; the electromyographic signal acquisition module receives a human body mainpower electromyographic signal acquired by the electrode sensor in real time through the time division multiplexing module; the virtual force is input into an electromyographic signal-force regression model processing unit to predict and evaluate the virtual force, further parameters of the electrical stimulation signal are dynamically adjusted to output a new electrical stimulation signal, and the virtual force feedback is adjusted to be consistent with the force given by a real object. According to the system, feedback adjustment can be carried out on the virtual force, and the immersion ofa virtual scene is enhanced.

Description

technical field [0001] The invention relates to virtual reality interaction technology, in particular to a virtual force feedback interaction system and method based on myoelectric evaluation. Background technique [0002] With the development of science and technology, virtual reality (Virtual Reality) technology has been widely concerned and applied, especially in games, film and television, education, medical treatment and other aspects have broad prospects. VR technology gives users the most realistic feeling by simulating the real world, making people feel immersive. At the same time, VR technology provides the perception functions possessed by human beings, including hearing, vision, touch, etc., which can greatly improve the immersion in the virtual world. At present, VR has been able to provide us with an extremely realistic virtual world, but when we try to reach out and touch these virtual objects, the sense of reality brought by VR is instantly shattered, because...

Claims

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Application Information

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IPC IPC(8): G06F3/01
CPCG06F3/016
Inventor 舒琳谢超阳徐向民朱齐
Owner SOUTH CHINA UNIV OF TECH
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