Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2005-01-18
2005-01-18
Le, Que T. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S231170
Reexamination Certificate
active
06844542
ABSTRACT:
The invention involves a marked plate for a rotational angle sensor element for rotating structural parts, with many angle marks provided preferably oriented radially to the rotational axis and preferably arranged in the form of a collar arranged concentrically to the rotational axis and with at least one reference mark, which is formed by an angle mark that deviates in its modulating properties and thus is integrated in the collar of the angle marks. An angle sensor element system for rotating structural parts includes a marked plate that can be coupled to the rotating structural part and that merely has a collar of angle marks with integrated reference marks and a fixed scanning unit for it, including at least one transmitter of electromagnetic radiation and at least one receiver for the radiation modulated by the marked plate, as well as mechanisms for connection to an evaluation unit. In order to distinguish the reference marks with certainty from the remaining angle marks, a process for determining a reference value from an analog signal provides that for each angle and reference mark, from an analog peak value of the preceding angle marks, an peak value continuing the trend of peak values is determined and is used in the evaluation unit, changed by a defined value, as a threshold for the presence of the reference value that deviates in its modulation.
REFERENCES:
patent: 4240069 (1980-12-01), Hullein et al.
patent: 5382792 (1995-01-01), Hurst et al.
patent: 40 30 229 (1992-03-01), None
patent: 41 08 954 (1992-09-01), None
patent: 0 964 222 (1999-12-01), None
Kirschbaum Paul
Leitmeier Klaus
AVL List GmbH
Le Que T.
Sonnenschein Nath & Rosenthal LLP
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