Abstract: A synthesis circuit synthesizes detection signals from a plurality of detection coils to generate a synthesized detection signal indicating a sine component of a rotation angle of a rotor. In this regard, the detection coils which are synthesis targets when the synthesis circuit generates the synthesized detection signal include a detection coil of a salient pole installed at a first electrical angle based on a first pole of the rotor and detection coils of salient poles installed at a second electrical angle different from the first electrical angle based on the first pole, and do not include detection coils installed at the first electrical angle based on a second pole.

Abstract: An object of the invention is to shorten a measurement time while preventing deterioration in resolution during frequency analysis and preventing a reduction in measurement range. A pulsimeter (1) includes a pulse data acquisition unit (100), a replication unit (16), and a frequency analysis unit (17). The replication unit (16) generates, when the number of pieces of acquired sampling data for a pulse rate calculation reaches n, m pieces of sampling data using the n pieces of sampling data and data obtained by replicating n-th sampling data. The frequency analysis unit (17) performs a frequency analysis on the m pieces of sampling data.

Abstract: A synthesis circuit synthesizes detection signals from a plurality of detection coils to generate a synthesized detection signal indicating a sine component of a rotation angle of a rotor. In this regard, the detection coils which are synthesis targets when the synthesis circuit generates the synthesized detection signal include a detection coil of a salient pole installed at a first electrical angle based on a first pole of the rotor and detection coils of salient poles installed at a second electrical angle different from the first electrical angle based on the first pole, and do not include detection coils installed at the first electrical angle based on a second pole.

Abstract: It is possible to reduce power consumption of a pulsimeter while suppressing a degradation in an accuracy of measuring pulse. A pulsimeter (1) includes a light emitter (10), a photodetector (12), an AD converter (14), a frequency analyzing unit (15), and an adjusting unit (17). The light emitter (10) emits light to a blood vessel of a measurement target. The photodetector (12) detects light emitted by the light emitter (10) via the blood vessel. The AD converter (14) analog/digital converts an output signal of the photodetector (12). The frequency analyzing unit (15) frequency-analyzes data converted by the AD converter (14). The adjusting unit (17) adjusts an amount of light emitted by the light emitter (10) based on the analysis result by the frequency analyzing unit (15).

Abstract: The present invention provides a signal processor that improves a resolution of a phase detection without increasing a clock frequency of a controller or decreasing a frequency of an excitation signal. A signal processor 10 includes a comparator 11 that compares a signal obtained by phase modulating a carrier frequency at a rotor rotation angle of a resolver with a dither signal.

Abstract: A signal converter 100 includes, for at least two-phase signals detected by a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter 101 that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter 102 that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, and a synthesizer 103 that combines the phase-shifted first phase signal with the phase-shifted second phase signal.

Abstract: It is possible to reduce power consumption of a pulsimeter while suppressing a degradation in an accuracy of measuring pulse. A pulsimeter (1) includes a light emitter (10), a photodetector (12), an AD converter (14), a frequency analyzing unit (15), and an adjusting unit (17). The light emitter (10) emits light to a blood vessel of a measurement target. The photodetector (12) detects light emitted by the light emitter (10) via the blood vessel. The AD converter (14) analog/digital converts an output signal of the photodetector (12). The frequency analyzing unit (15) frequency-analyzes data converted by the AD converter (14). The adjusting unit (17) adjusts an amount of light emitted by the light emitter (10) based on the analysis result by the frequency analyzing unit (15).

Abstract: A signal converter 100 includes, for at least two-phase signals detected by a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter 101 that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter 102 that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, and a synthesizer 103 that combines the phase-shifted first phase signal with the phase-shifted second phase signal.

Abstract: A control apparatus includes, for at least two-phase signals detected from a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, a signal generator that generates a correction signal for canceling out an error component of the carrier signal, and a synthesizer that synthesizes the phase-shifted first phase signal, the phase-shifted second signal, and the correction signal for canceling out the error component, in order to create a phase-modulated signal that is the carrier signal being modulated at a rotation angle of a rotor of the resolver.

Abstract: It is possible to reduce power consumption of a pulsimeter while suppressing a degradation in an accuracy of measuring pulse. A pulsimeter 1 includes a light emitter 10, a photodetector 12, an AD converter 14, a frequency analyzing unit 15, and an adjusting unit 17. The light emitter 10 emits light to a blood vessel of a measurement target. The photodetector 12 detects light emitted by the light emitter 10 via the blood vessel. The AD converter 14 analog/digital converts an output signal of the photodetector 12. The frequency analyzing unit 15 frequency-analyzes data converted by the AD converter 14. The adjusting unit 17 adjusts an amount of light emitted by the light emitter 10 based on the analysis result by the frequency analyzing unit 15.

Abstract: A signal converter 100 includes, for at least two-phase signals detected by a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter 101 that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter 102 that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, and a synthesizer 103 that combines the phase-shifted first phase signal with the phase-shifted second phase signal.

Abstract: A signal converter 100 includes, for at least two-phase signals detected by a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter 101 that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter 102 that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, and a synthesizer 103 that combines the phase-shifted first phase signal with the phase-shifted second phase signal.

Abstract: A signal converter 100 includes, for at least two-phase signals detected by a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter 101 that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter 102 that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, and a synthesizer 103 that combines the phase-shifted first phase signal with the phase-shifted second phase signal.

Abstract: A control apparatus includes, for at least two-phase signals detected from a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, a signal generator that generates a correction signal for canceling out an error component of the carrier signal, and a synthesizer that synthesizes the phase-shifted first phase signal, the phase-shifted second signal, and the correction signal for canceling out the error component, in order to create a phase-modulated signal that is the carrier signal being modulated at a rotation angle of a rotor of the resolver.

Abstract: The present invention provides a signal processor that improves a resolution of a phase detection without increasing a clock frequency of a controller or decreasing a frequency of an excitation signal. A signal processor 10 includes a comparator 11 that compares a signal obtained by phase modulating a carrier frequency at a rotor rotation angle of a resolver with a dither signal.

Abstract: A signal converter 100 includes, for at least two-phase signals detected by a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter 101 that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter 102 that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, and a synthesizer 103 that combines the phase-shifted first phase signal with the phase-shifted second phase signal.

Abstract: A signal converter 100 includes, for at least two-phase signals detected by a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter 101 that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter 102 that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, and a synthesizer 103 that combines the phase-shifted first phase signal with the phase-shifted second phase signal.

Abstract: A signal converter 100 includes, for at least two-phase signals detected by a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter 101 that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter 102 that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, and a synthesizer 103 that combines the phase-shifted first phase signal with the phase-shifted second phase signal.

Abstract: It is possible to reduce power consumption of a pulsimeter while suppressing a degradation in an accuracy of measuring pulse. A pulsimeter 1 includes a light emitter 10, a photodetector 12, an AD converter 14, a frequency analyzing unit 15, and an adjusting unit 17. The light emitter 10 emits light to a blood vessel of a measurement target. The photodetector 12 detects light emitted by the light emitter 10 via the blood vessel. The AD converter 14 analog/digital converts an output signal of the photodetector 12. The frequency analyzing unit 15 frequency-analyzes data converted by the AD converter 14. The adjusting unit 17 adjusts an amount of light emitted by the light emitter 10 based on the analysis result by the frequency analyzing unit 15.

Abstract: It is possible to reduce power consumption of a pulsimeter. A pulsimeter 2 includes a light emitter 10, a photodetector 12, a sample and hold circuit 20, an AD converter 14, and a time measurement unit 22. The light emitter 10 periodically repeats a light emission for a predetermined period of time to a blood vessel of a measurement target. The photodetector 12 detects light emitted by the light emitter 10 via the blood vessel. The sample and hold circuit 20 takes and holds an output voltage of the photodetector 12. The AD converter 14 analog/digital converts an output voltage of the sample and hold circuit 20. The time measurement unit 22 measures a time for an output of the sample and hold circuit to be constant. A light emitting time of the light emitter is set by the time measured by the time measurement unit 22.