Electromagnetic locomotion platform for translation and total immersion of humans into virtual environments

• US 6,050,822 A
• Filed: 10/01/1997
• Issued: 04/18/2000
• Est. Priority Date: 10/01/1997
• Status: Expired due to Fees

• Current Assignee: United States Of America As Represented By The Secretary Of The Army (Government of the United States of America)
• Original Assignee: The United States Of America As Represented By The Secretary Of The Army
• Inventors: Faughn, Jim A.
• Primary Examiner(s): Cheng, Joe H.
• Application Number:
  US08/942,193
• Time in Patent Office: 930 Days
• Field of Search: 434/11-17, 434/19, 434/21, 434/22, 434/27, 434/247, 434/253, 434/255, 434/307 R, 434/308, 434/365, 482/4, 482/8, 482/52, 482/54, 482/70, 482/79, 482/900-902, 198/779, 73/379.01, 463/1, 463/31, 463/36, 463/42, 472/60, 472/130, 395/500.27, 395/500.28, 395/500.34, 395/500.41, 345/302, 345/473, 345/121, 345/145, 345/952, 345/425, 266/48, 266/49, 406/177
• US Class Current: 434/11
• CPC Class Codes: A63F 2300/1068 being specially adapted to detect the point of contact of the player on a surface, e.g. floor mat, touch pad
• CPC Class Codes: A63F 2300/302 specially adapted for receiving control signals not targeted to a display device or game input means, e.g. vibrating driver's seat, scent dispenser
• CPC Class Codes: A63F 2300/8082 Virtual reality
• CPC Class Codes: G06F 2203/012 Walk-in-place systems for allowing a user to walk in a virtual environment while constraining him to a given position in the physical environment
• 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: G09B 9/00 Simulators for teaching or training purposes for the use of weapons F41; computing aspects G06; protocols for games, networked simulations or virtual reality H04L67/131
• CPC Class Codes: Y10S 345/952 Simulation
• CPC Class Codes: Y10S 482/902 Employing specific graphic or video display

Abstract

The present invention, an Electromagnetic Locomotion Platform (ELP) system, is an electronically powered device which allows human-like activities to be performed in all three axes: x, y, & z, in a confined and localized a for the purpose of attaining total immersion (both visual and physical) into Virtual Environments. The ELP system allows humans the ability to walk, jog, run, crawl, etc. in a stationary position, thus the user can "walk forever to nowhere", similar to the basic function of a treadmill. This feature can be enhanced by having the user wear a helmet mounted display (HMD) which is coupled to a computer generated Virtual Reality (VR) system. The VR system provides external environments to the HMD and when synchronized with the movements of the individual on the ELP, it displays visual changes in the surrounding environment according to the movements generated by the user. This is a system which then can totally immerse someone into a Virtual Environment by allowing body movement to dictate visual changes in the environment, yet keep the subject in essentially the same location. In addition to the visual immersion capability, the ELP also has the ability to physically immerse humans by generating and applying resistive forces which will cause the body to work, this energy expenditure replicates the physical loads experienced by the body in the real world.

Claims

1. A device for the translation of an object having a ferrous content comprising:

a structure having a plurality of cavities therein;

a plurality of electromagnets located within a portion of said cavities;

a low friction surface upon a portion of said structure;

means for controlling said plurality of electromagnets such that said object can be translated along said low friction surface.

2. The device of claim 1 wherein said structure comprises a platform having a flat surface.

3. The device of claim 2 wherein said low friction surface is located on said flat surface.

4. The device of claim 3 further inOcluding a plurality of sensors located within a portion of said cavities, said sensors providing an indication to said controlling means as to the position of said object.

5. The device of claim 4 wherein said low friction surface comprises a surface having a plurality of micro ball bearings.

6. The device of claim 4 wherein said low friction surface comprises an air cushion table.

7. The device of claim 4 wherein said structure has a honeycomb shape.

8. A system for translation and immersion of a person into a virtual environment comprising:

a platform having a flat horizontal surface, a plurality of electromagnets located below said flat horizontal surface, and a low friction surface located upon said flat horizontal surface;

a visual interface for displaying a virtual scene to said person;

a plurality of ferrous items located on said person for interacting with said plurality of electromagnets;

means for controlling said plurality of electromagnets to attract and repel said plurality of ferrous items located on said person such that said person is able to move on said platform to thereby simulate movement in said virtual environment.

9. The system of claim 8 further comprising:

means for calibrating the movements of said person prior to said person moving on said platform.

10. The system of claim 9 wherein said means for calibrating comprises a second platform having a plurality of sensors connected to said means for controlling said electromagnets.

11. The system of claim 10 further comprising means for providing virtual reality steps for said person.

12. The system of claim 10 wherein said plurality of ferrous items comprises ferrous plates in the soles of a pair of shoes worn by said person.

13. The system of claim 12 further comprising means for said person to send a signal to said means for controlling said plurality of electromagnets.

14. A method for immersion of a person into a virtual environment comprising the steps of:

calibrating a persons movements by;

15. placing one of said persons feet on a calibration platform having a plurality of sensors connected to a computer;

2. having said person take a series of steps on said calibration platform;

3. having said computer calculate a calibrated step for said person;

placing said person on a movement platform having a flat horizontal surface, a plurality of electromagnets located below said flat horizontal surface, and a low friction surface located upon said flat horizontal surface;

providing a visual interface for displaying a virtual scene to said person;

providing a plurality of ferrous items located on said person for interacting with said plurality of electromagnets;

having said computer control said electromagnets to attract and repel said ferrous items in response to movement by said person;

allowing said person move on said movement platform in response to said virtual scene to thereby immerse said person into said virtual environment.