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US 7,458,164 B2Granted
Angle measurement device
AssigneeCarl Freudenberg KG
InventorsFabien Perret, Laurent Salagnac
Life of this patent
Estimating the term…
Abstract
An angle measuring device comprising a rotating device which includes a signal-generating regular element, at least one signal-generating irregular element, and at least one sensor for acquiring the signals. The irregular element has a double extension compared to the regular element.
Claims15
An angle measuring device comprising:
- a rotating device;
- and
- at least one sensor disposed at said rotating device,
- wherein said rotating device includes a signal-generating regular element and at least one signal-generating irregular element, said regular element having a first extension and said irregular element having a second extension, said second extension being double the first extension;
- said rotating device is formed by a gear wheel;
- said regular and irregular elements are formed by a plurality of teeth of said gear wheel;
- said teeth each have an upper portion and lower portion, and between said upper portion and said lower portion of said irregular element a mid-portion is arranged;
- and
- said mid-portion is arranged at a position located at about half a height of said teeth.
6 more elements
A device comprising:
- a rotating device including a plurality of sensor elements;
- and
- a sensor disposed adjacent said rotating device that senses a position of said sensor elements;
- wherein said sensor elements include a plurality of first elements and at least one second element, said sensor elements being disposed around an outer surface of said rotating device,
- said first elements each including an upper portion and a lower portion, and
- said second element including an upper portion, a mid-portion, and a lower portion;
- and
- said mid-portion has a slope that increases in a direction toward said lower portion.
5 more elements
A device comprising:
- a gear wheel including a plurality of teeth acting as a plurality of sensor elements, said sensor elements being disposed around a circumference of said gear wheel;
- and
- a sensor disposed adjacent said gear wheel;
- wherein said sensor elements include a plurality of regularly shaped teeth and at least one irregularly shaped tooth, said regularly shaped teeth each including an upper portion connected to a lower portion by a smoothly formed sidewall,
- said irregularly shaped tooth including an upper portion connected to a lower portion by a sidewall including a plateau formed therein having a slope that increases in a direction toward the lower portion, and
- said irregularly shaped tooth acts as a reference point for said sensor.
3 more elements
Dependencies are inferred from the claim text.