Coded data generation or conversion – Phase or time of phase change – Synchro or resolver signal
Reexamination Certificate
2005-07-07
2008-08-12
Young, Brian (Department: 2819)
Coded data generation or conversion
Phase or time of phase change
Synchro or resolver signal
C341S155000
Reexamination Certificate
active
07411530
ABSTRACT:
Two analog signals are substantially sinusoidal and out-of-phase by about9020 relative to each other when an element moves in a temporally uniform manner in relation to a stationary element. The two analog signals make it possible to determine the actual position of the moving element relative to the stationary element. The analog signals have a corresponding maximum frequency when the moving element moves at a maximum speed. The signals are detected by sensor units and are fed to AD converters which digitize the signals at a scanning frequency and feed corresponding digital signals to an evaluation block that is configured as a hardware circuit, the scanning frequency of the AD converters being more than twice as large as the maximum frequency. The digital signals are fed to a computing block within the evaluation block, said computing block calculating an arc tangent that corresponds to the digital signals in real time. The evaluation block also determines corrective values for the digital signals in real time based on the digital signals.
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