The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 2004
Filed:
Oct. 05, 2000
Steven Eric Lithicum, Niskayuna, NY (US);
Russell Scott Blue, Clifton Park, NY (US);
Christopher Richard Volpe, Niskayuna, NY (US);
Ricardo Scott Avila, Clifton Park, NY (US);
James Vradenburg Miller, Schenectady, NY (US);
General Electric Company, Niskayuna, NY (US);
Abstract
The present invention is directed toward providing interactive haptic collision detection between a stationary and a moving object in a virtual reality environment. A user grasps the arm of a haptic device and manipulates an object as viewed on a virtual reality display. As any portion of the manipulated object comes too close to the surface of the stationary object, the haptic device imposes feedback forces against the user's efforts that increase in magnitude as the user manipulates the object beyond a force boundary proximate to the surface of the stationary object. The feedback forces are applied directionally in line with the shortest path between the surfaces at risk of collision. Several measures can be implemented by the user to reduce the computation load involved in constantly comparing the distances between points on the surface of the movable object and points on the surface of the stationary object without seriously compromising the collision detection and avoidance functions of the system. Furthermore, while the invention provides for up to six degrees of freedom for manipulating objects and providing haptic feedback, the system also accommodates three degrees of haptic freedom and feedback, with the additional three degrees of rotational feedback being provided visibly or audibly.