Detected signal processing device for rotating sensor and detected signal outputting method therefor
First Claim
1. A detected signal processing device for a rotating sensor, which detects a rotation direction and a rotational speed of a rotor and outputs rotational direction signals having different waveforms according to the rotation direction, said rotational output signals based on timing corresponding to the detected rotational speed, said detected signal processing device comprising:
- rotational speed determining means for determining whether the rotational speed of the rotor reaches a predetermined rotational speed;
signal pattern generating means for utilizing the rotational direction signals in combination to generate transfer signals different from the rotational direction and rotational speed of the rotor; and
signal processing means for signal processing to output a signal generated by the signal pattern generating means with timing corresponding to the rotational speed when a signal generated by the signal pattern generating means exists, where it is determined by the determining means that the rotational speed of the rotor has reached the predetermined rotational speed.
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Abstract
The rotation of a rotating magnet is detected by magnetic sensors. The rotational speed is detected from pulse signals detected by magnetic sensors, and the rotational direction thereof is detected from the difference in the way of making a shift in phase. Signals different in pulse width are generated according to the rotational direction. A signal selection circuit outputs a corresponding pulse signal with timing for the rotational speed. A rotational speed determining circuit outputs a decision signal Sf of a high level when the rotational speed reaches a predetermined speed. When a self-diagnostic circuit determines that the magnetic sensors have malfunctioned, a binary error code generating circuit generates an error signal Sg and a 4-bit error code signal Sh. When the signal Sf of the rotating magnet is brought to a high level, the signal selection circuit associates a signal corresponding to the rotational direction with data of “1” or “0” to output an error code signal and allows a current output circuit to output an output current Is.
90 Citations
13 Claims
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1. A detected signal processing device for a rotating sensor, which detects a rotation direction and a rotational speed of a rotor and outputs rotational direction signals having different waveforms according to the rotation direction, said rotational output signals based on timing corresponding to the detected rotational speed, said detected signal processing device comprising:
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rotational speed determining means for determining whether the rotational speed of the rotor reaches a predetermined rotational speed;
signal pattern generating means for utilizing the rotational direction signals in combination to generate transfer signals different from the rotational direction and rotational speed of the rotor; and
signal processing means for signal processing to output a signal generated by the signal pattern generating means with timing corresponding to the rotational speed when a signal generated by the signal pattern generating means exists, where it is determined by the determining means that the rotational speed of the rotor has reached the predetermined rotational speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A detected signal outputting method for a rotating sensor, comprising:
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outputting rotational direction signals different in waveform according to a rotational direction of a rotor with timing corresponding to a rotational speed of the rotor to thereby output information corresponding to the rotational speed and rotational direction of the rotor; and
utilizing the rotational direction signals different in waveform corresponding to the rotational direction in combination on condition that the rotational speed of the rotor reaches a predetermined rotational speed to thereby generate a transfer signal different from the rotational direction and rotational speed of the rotor as a signal pattern; and
outputting the generated one with timing corresponding to the rotational speed. - View Dependent Claims (12, 13)
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Specification