Diagnostic apparatus and diagnostic method
AssigneeKabushiki Kaisha Toshiba
InventorsTatsuhiko Goto, Akihiko Enamito, Osamu Nishimura
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Abstract
According to an embodiment, a diagnostic apparatus includes a sound-emitting unit, at least one measurement unit, and a processor. The sound-emitting unit includes a plurality of speakers arranged at equal angular intervals on a circumference of a circle, and is configured to emit a first vibration sound to a target by using the speakers. The at least one measurement unit is arranged on a central axis of the circle, and is configured to measure a vibration of the target generated in response to the first vibration sound, or a second vibration sound radiated from the target due to the vibration. The processor is configured to diagnose the target based on an output from the at least one measurement unit.
Claims11
A diagnostic apparatus comprising:
- a sound-emitting unit including a plurality of speakers arranged at equal angular intervals on a circumference of a circle, the sound-emitting unit being configured to emit a first vibration sound to a target by using the speakers;
- at least one measurement unit arranged on a central axis of the circle, the at least one measurement unit being configured to measure a vibration of the target generated in response to the first vibration sound, or a second vibration sound radiated from the target due to the vibration;
- and
- a processor configured to diagnose the target based on an output from the at least one measurement unit,
- wherein the sound-emitting unit includes Lp speakers as the speakers, and is configured to emit a vibration sound in a Lobe mode as the first vibration sound, Lp≥2M+1 is satisfied where M (M≥1) is an order of the Lobe mode, and a phase difference depending on Lp and M is set between two speakers adjacent to each other on the circumference.
A diagnostic apparatus comprising:
- a sound-emitting unit including a plurality of speakers arranged at equal angular intervals on a circumference of a circle, the sound-emitting unit being configured to emit a first vibration sound to a target by using the speakers;
- at least one measurement unit arranged on a central axis of the circle, the at least one measurement unit being configured to measure a vibration of the target generated in response to the first vibration sound, or a second vibration sound radiated from the target due to the vibration;
- and
- a processor configured to diagnose the target based on an output from the at least one measurement unit,
- wherein the sound-emitting unit includes Lp speakers as the speakers, is configured to emit a vibration sound in a Lobe mode as the first vibration sound, the Lobe mode being selected from a plurality of Lobe modes, and Lp≥2Mmax+1 is satisfied where Mmax is a maximum value of orders of the plurality of Lobe modes.
A diagnostic method comprising:
- emitting a first vibration sound to a target by using speakers arranged at equal angular intervals on a circumference of a circle;
- measuring a vibration of the target generated in response to the first vibration sound, or a second vibration sound radiated from the target due the vibration, by using at least one measurement unit arranged on a central axis of the circle;
- and
- diagnosing the target based on an output from the at least one measurement unit,
- wherein emitting the first vibration sound uses Lp speakers as the speakers to emit a vibration sound in a Lobe mode as the first vibration sound, Lp≥2M+1 is satisfied where M (M≥1) is an order of the Lobe mode, and a phase difference depending on Lp and M is set between two speakers adjacent to each other on the circumference.
Dependencies are inferred from the claim text.