| 摘要 |
A revolution counter for determining the number of revolutions of a shaft, the revolution counter including sensors, with which position values that define an angular position of a shaft are generated, and a determination unit that receives the position values from the sensors and generates decision signals from the position values, wherein the decision signals determine counting sectors within one revolution of the shaft. The revolution counter further includes a counting control unit that receives the counting sectors from the determination unit, wherein the counting control unit, which as a function of a chronological order of the counting sectors operates the revolution counter in a first mode of operation or in a second mode of operation. The counting control unit switches over to the second mode of operation, which is an energy-saving pulsed mode, if after a defined length of time no change in one of the counting sectors takes place, and switches over to the first mode of operation if a change in one of the counting sectors does take place. The determination unit determines an uncertainty range between each pairing of the counting sectors and the counting control unit does not take the uncertainty ranges which adjoins one of the counting sectors that has led to a switchover to the second mode of operation into account for the switchover from the second mode of operation to the first mode of operation.
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