Virtual environment navigation device and system

• US 20060139317A1
• Filed: 11/22/2005
• Published: 06/29/2006
• Est. Priority Date: 11/23/2004
• Status: Abandoned Application

• Current Assignee: Curators of the University of Missouri (University of Missouri)
• Original Assignee: Curators of the University of Missouri (University of Missouri)
• Inventors: Nandanoor, Krishna Reddy, Stull, Troy, Lokhande, Vishal N., Leu, Ming C.
• Application Number:
  US11/285,253
• Publication Number:
  US 20060139317A1
• Time in Patent Office: Days
• US Class Current: 345/156
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00
• CPC Class Codes: G06F 3/016 Input arrangements with force or tactile feedback as computer generated output to the user

Abstract

An impact platform device for use with a virtual reality interface system that promotes navigation by a user in a virtual environment, the platform device including a platform being configured to receive impacts from the user, an odd-numbered plurality of sensors evenly spaced about a circumference and disposed relative the platform such that each of the sensors is configured to detect when the user impacts a portion of the platform.

Claims

1. An impact platform device for use with a virtual reality interface system that promotes navigation by a user in a virtual environment, said platform device comprising:

a platform being configured to receive impacts from the user;

an odd-numbered plurality of sensors evenly spaced about a circumference and disposed relative said platform such that each of said sensors is configured to detect when the user impacts a portion of said platform.

2. The device of claim 1 further comprising a processor for accepting inputs from said plurality of sensors, said processor being programmed to designate a master sensor plus an even number of remaining sensors, where said master sensor and one-half of said even number of remaining sensors are disposed within a first semicircle of said generally circular circumference and one-half of said even number of remaining sensors are disposed within a second semicircle of said generally circular circumference.

3. The device of claim 2 wherein said processor further designates said master sensor to be configured and arranged to be at a 90°

angle with respect to said diameter.

4. The device of claim 1 wherein said odd-numbered plurality of sensors comprises five sensors.

5. The device of claim 1 wherein said sensors comprise one of contact sensors, pressure sensors, strain gauges, force sensors, and optical sensors.

6. The device of claim 1 further comprising a base on which said plurality of sensors is disposed.

7. The device of claim 6 further comprising a support for supporting said platform relative said base and permitting relative movement between said base and said platform.

8. The device of claim 7 wherein said support comprises a pivoting member having a generally planar base portion configured to abut an underside of said platform, and a point configured to abut a top surface of said base.

9. A virtual reality interface system that promotes navigation by a user in a virtual environment, said system comprising:

said device of claim 1;

an orientation detector configured to be coupled to the user'"'"'s body;

a processor for receiving, storing and analyzing data from said sensors and said orientation detector; and

a virtual reality display for displaying a virtual reality environment to the user.

10. The system of claim 9 further comprising a data acquisition interface for receiving data from said sensors and communicating the data from said sensors to said processor.

11. The system of claim 9 wherein said orientation detector comprises inertial sensor configured to be mounted to the user'"'"'s torso.

12. The system of claim 9 further comprising a cushion for absorbing shock and vibration and producing spring action to break contact between said sensors and said platform.

13. The system of claim 12 wherein said cushion comprises a pneumatic rubber ring disposed between a central axis of said base and a circumference formed by said sensors.

14. The system of claim 9 wherein said processor comprises one of a dedicated PC, a dedicated gaming console, a shared PC, and a shared gaming console.

15. The system of claim 9 wherein said display comprises one of head mounted displays, CRT monitors, video game consoles, and computer automated virtual environment.

16. A software subsystem for use with the virtual reality navigation interface system of claim 9, said subsystem comprising:

alignment instructions for aligning X_v, Y_v and Z_v coordinate axes of said system with the user'"'"'s coordinate axes X_u, Y_u, Z_u;

orientation instructions for detecting the user'"'"'s orientation based on data received from said orientation means;

prediction instructions for predicting the user'"'"'s navigation intention; and

detection instructions for detecting a number of impacts made by the user.

17. A method of determining user movement in a virtual reality interface system that promotes navigation by a user in a virtual environment, where the interface system includes a platform assembly for sensing impacts by a user, an orientation device coupled to the user, a data acquisition interface, a processor, an orientation device and a display device, said method comprising:

obtaining data from an odd number of sensors disposed evenly about a circumference;

designating a master sensor; and

dividing with a diameter an area confined by the circumference into a first semicircle and a second semicircle, where the master sensor is disposed within the first semicircle at an angle of 90 degrees with respect to the diameter and one half of the remaining sensors are disposed within the first semicircle, while another half are disposed in the second semicircle.

18. The method of claim 17 further comprising:

collecting input from the orientation device;

communicating orientation data from the orientation device to the processor;

initiating user impact on the platform assembly;

collecting impact data with the platform assembly;

transferring the impact data to the processor via the data acquisition interface;

analyzing by the processor of the impact data along with the orientation data to detect the orientation of the user and the number of impacts made by the user and predict the user'"'"'s navigation intention; and

providing the orientation changes of the user and the number of steps to a virtual reality engine for updating the display device.

19. The method of claim 17 wherein said analyzing step further comprises:

aligning said system'"'"'s coordinate axes with the user'"'"'s coordinate axes;

detecting the user'"'"'s orientation;

detecting the number of steps made by the user; and

predicting the user'"'"'s navigation intention.

20. The method of claim 17 further comprising providing five sensors on the platform assembly for sensing impacts by the user and communicating the impacts to the data acquisition device.

21. The method of claim 17 further comprising coupling the orientation device to the user'"'"'s body.