Helmet display virtual vision time delay compensation system and method based on human body surface myoelectric information

A head-mounted display and delay compensation technology, applied in the field of virtual reality, can solve problems such as delay effect, inconsistent simulation feeling, and influence on simulation effect, and achieve the effect of light weight, high sensitivity and small size

Inactive Publication Date: 2007-09-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Once the head moves quickly, the view on the head-mounted display will have an obvious delay effect, which will affect the simulation effect
At the same time, because the electromagnetic tracker will be disturbed in the ferromagnetic environment, and the ultrasonic tracker will lose data when occlusion occurs, in the actual simulation, this will cause the inconsistency of the simulation feeling
After operating in this environment for a long time, the operator may even have symptoms of "simulation sickness"

Method used

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  • Helmet display virtual vision time delay compensation system and method based on human body surface myoelectric information
  • Helmet display virtual vision time delay compensation system and method based on human body surface myoelectric information
  • Helmet display virtual vision time delay compensation system and method based on human body surface myoelectric information

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Embodiment Construction

[0030] The working principle of surface EMG detection in the virtual visual delay compensation system is shown in Figure 1: the essence of delay compensation is to predict future head motion data from the currently obtained head motion data, which can be expressed by the following formula: P ^ = P 0 + V 0 τ + 1 2 A 0 τ 2 + 1 6 B 0 τ 3 , in is the predicted head position, P 0 is the currently obtained head position information, V 0 is the currently obtained head speed information, A 0 is the currently obtained head acceleration information, B 0 is the currently obtained surface EMG information of head m...

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Abstract

The invention relates to HMD virtual visual delay compensation system and working procedure, based on the body surface electromyography information, belongs to virtual reality technology. The system includes collecting electrode, reference electrode, collection equipment of multi-channel surface electromyography information, computers, HMD.The work steps of the system are: place electrode on the neck of operator, and make signal amplification and filtering connecting with multi-channel surface electromyography information collection devices, put the digital signal treatment into the computer, first initial calibration procedures by the computer, by we can initially study the typical head movement according to voice prompt, then move the head to forecast operating procedures in the virtual HMD visual signal delay compensation, while tracking data with the original data integration, improving accuracy of head tracking. The characteristic of this invention is small in size, light weight, strong predictive power, and high sensitivity.

Description

(1) Technical field [0001] The invention relates to the field of virtual reality, and is a technology for compensating virtual visual time delay in a helmet display system, which is used to assist an existing position tracking device in the helmet display system to determine the movement direction and amplitude of a human head, and transmit them to a computer The system is used for time delay compensation of virtual vision. (2) Background technology [0002] Virtual reality emphasizes immersion, and is a simulation technology that ultimately takes human perception (including visual, auditory, tactile, and even smell) effects as the evaluation standard. Of all the senses, vision occupies the most important part, so it has the greatest impact on immersion. Head-mounted display is an important virtual vision device, which is widely used. In order to display the corresponding virtual scene in real time according to the human movement, it is often necessary to track the head mov...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/01
Inventor 顾宏斌吴东苏高振兴柴功博
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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