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US 8,408,918 B2Granted
Method and apparatus for haptic simulation
AssigneeEnergid Technologies Corporation
InventorsJianjuen Hu, Gill Pratt, Jeff Weber
Life of this patent
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Abstract
A haptic simulation method determines a location of a needle assembly within a magneto-rheological fluid. The needle assembly within the magneto-rheological fluid is associated with a desired resistance value. A viscosity control signal representative of the desired resistance value is generated. The viscosity control signal is applied to a viscosity control device to vary a viscosity of the magneto-rheological fluid to achieve the desired resistance value.
Claims15
A method comprising:
- determining a location of a needle assembly within a magneto-rheological fluid;
- associating the location of the needle assembly within the magneto-rheological fluid with a desired resistance value;
- generating a viscosity control signal representative of the desired resistance value;
- and
- applying the viscosity control signal to a viscosity control device to vary a viscosity of the magneto-rheological fluid to achieve the desired resistance value.
2 more elements
A simulation apparatus comprising:
- a container assembly;
- a magneto-rheological fluid positioned within the container assembly;
- a needle assembly configured to be displaceable through the magneto-rheological fluid;
- a displacement sensor configured to determine a location of the needle assembly within the magneto-rheological fluid and generate a location signal indicative of the location;
- a resistance control device, responsive to the location signal, configured to:
- associate the location of the needle assembly within the magneto-rheological fluid with a desired resistance value, and generate a viscosity control signal representative of the desired resistance value;
- and
- a viscosity control device, responsive to the viscosity control signal, configured to vary the viscosity of the magneto-rheological fluid to achieve the desired resistance value.
5 more elements
A simulation apparatus comprising:
- a syringe assembly;
- a magneto-rheological fluid positioned within the syringe assembly, the syringe assembly including a plunger assembly for displacing at least a portion of the magneto-rheological fluid from an orifice of the syringe assembly;
- and
- a viscosity control device, responsive to a viscosity control signal, configured to vary a viscosity of the magneto-rheological fluid displaced from the orifice of the syringe assembly to achieve a desired plunger resistance value.
1 more element
Dependencies are inferred from the claim text.