Method for determining motion condition of object e.g. shaft, involves calculating increment and decrement of generator based on time interval, and determining motion state of generator based on increment and decrement of generator movement

摘要

The method involves measuring an absolute frequency of an output signal using an impulse counter during a predetermined time interval, and determining positional change using a quadrate decoder based on the signal, while difference is formed between the beginning and ending of the time interval. Increment and decrement of a signal generator (10) i.e. incremental rotary encoder, is calculated from the absolute and position based frequencies based on the time interval. A motion state of the generator is determined based on the increment and decrement of the movement of the generator.