Rotation sensor, and method for outputting signals from rotation sensor
AssigneeAisin Seiki Kabushiki Kaisha
InventorsManabu Kato, Eiji Fujioka
Life of this patent
Estimating the term…
Abstract
A rotation sensor for outputting a pulse signal, which has a frequency corresponding to a rotation speed of a rotor, to a wire. The rotation sensor includes a modulation unit and an output unit. The modulation unit modulates an information signal representing information other than the rotation speed into a carrier wave having a frequency higher than the frequency of the pulse signal. The output unit superimposes and outputs to the wire the pulse signal and the carrier wave. Accordingly, the rotation sensor performs stable information transmission that is not dependent on the rotation speed of the rotor.
Claims20
A rotation sensor for outputting a pulse signal, which has a frequency corresponding to a rotation speed of a rotor, to an output wire, the rotation sensor comprising:
- a rotation detection unit for outputting a signal corresponding to the rotation speed of the rotor;
- a waveform shaping unit for receiving an output signal from the rotation detection unit and outputting a pulse signal corresponding to the received signal;
- a first signal processing unit for receiving the pulse signal output from the waveform shaping unit and outputting a first information signal based on the received pulse signal;
- a second signal processing unit for receiving the first information signal output from the first signal processing unit, receiving a first external information signal from a first external information source through an input wire, and outputting a second information signal including the first information signal and the first external information signal;
- a modulation unit for receiving the second information signal output from the second signal processing unit, modulating the received second information signal into a carrier wave having a first frequency that is higher than the frequency of the pulse signal, and outputting the carrier wave;
- a reception unit for receiving a second external information signal from a second external information source through a wireless communication, frequency converting the received second external information signal to a third information signal having a second frequency that is different from the first frequency and is higher than the frequency of the pulse signal, and outputting the third information signal;
- and
- an adding unit for receiving the pulse signal output from the waveform shaping unit, the carrier wave output from the modulation unit, and the third information signal output from the reception unit to output to the output wire an output signal obtained by superimposing the received pulse signal, carrier wave, and third information signal.
Dependencies are inferred from the claim text.