Device to determine an absolute rotation angle of a rotary shaft
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United States of America Patent
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N/A
Issued Date -
Dec 20, 2007
app pub date -
Jun 19, 2007
filing date -
Jun 20, 2006
priority date (Note) -
Abandoned
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Abstract
A device to determine an absolute rotation angle of a rotary shaft (14) has a first measurement arrangement (10) to measure a rotation angle in a restricted first measurement range, and a second measurement arrangement (12) to determine an absolute angle range. The first measurement arrangement (10) includes a rotor (16), coupled to the rotary shaft (14), and a carrier which is stationary in relation to the rotor (16). Coded zones (18) are arranged either on the rotor (16) or on the carrier. The coded zones (18) are distributed in the peripheral direction with respect to the rotary shaft (14). At least one first sensor (20) is arranged on the carrier or on the rotor (16), respectively. The first sensor (20) detects a coding of the coded zones (18) when the rotary shaft (14) rotates.
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