Force feedback interface with improved sensation
First Claim
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1. An haptic interface comprising:
- an element that interacts with a user, a rotation shaft with a longitudinal axis to which the user interaction element is fixed in rotation;
an element that interacts with a fluid, the fluid interaction element being fixed in rotation to the shaft, the fluid being of magneto-rheological type;
a system that generates a magnetic field in the fluid configured to modify viscosity of the fluid;
a control unit configured to generate orders to the magnetic field generation system so as to modify the magnetic field;
a housing containing the interaction element, the magneto-rheological fluid, and the system for generating a magnetic field, the housing including a sidewall and two end walls, the rotation shaft passing through one of the end walls and penetrating inside the housing, the housing forming a sealed chamber confining the magneto-rheological fluid;
whereinthe user interaction element is arranged outside the housing,the system for generating a magnetic field comprising means for generating a variable magnetic field and means for generating a permanent magnetic field, the means for generating a permanent magnetic field being arranged in the housing to cause an increase in the fluid viscosity in absence of a system electrical power supply, andthe means for generating a variable magnetic field and the means for generating a permanent magnetic field are each located inside the fluid interaction element and are each immobile relative to the housing.
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Abstract
An haptic interface including a knob manipulated by a user, a rotation shaft with a longitudinal axis to which the knob is fixed in rotation, an interaction element with a magneto-rheological fluid in rotation with the shaft, the fluid, a system for generating a magnetic field in the fluid, and a control unit capable of generating orders to the system for generating the magnetic field to modify the magnetic field. The system includes a coil type mechanism generating a variable magnetic field, and a permanent magnet type mechanism generating a permanent magnetic field.
94 Citations
23 Claims
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1. An haptic interface comprising:
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an element that interacts with a user, a rotation shaft with a longitudinal axis to which the user interaction element is fixed in rotation; an element that interacts with a fluid, the fluid interaction element being fixed in rotation to the shaft, the fluid being of magneto-rheological type; a system that generates a magnetic field in the fluid configured to modify viscosity of the fluid; a control unit configured to generate orders to the magnetic field generation system so as to modify the magnetic field; a housing containing the interaction element, the magneto-rheological fluid, and the system for generating a magnetic field, the housing including a sidewall and two end walls, the rotation shaft passing through one of the end walls and penetrating inside the housing, the housing forming a sealed chamber confining the magneto-rheological fluid;
whereinthe user interaction element is arranged outside the housing, the system for generating a magnetic field comprising means for generating a variable magnetic field and means for generating a permanent magnetic field, the means for generating a permanent magnetic field being arranged in the housing to cause an increase in the fluid viscosity in absence of a system electrical power supply, and the means for generating a variable magnetic field and the means for generating a permanent magnetic field are each located inside the fluid interaction element and are each immobile relative to the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification