Back to results
US 11,906,374 B2Granted
Measurement method and measurement apparatus
AssigneeYamaha Corporation
InventorTomoya Miyata
Life of this patent
Estimating the term…
Abstract
Provided is a measurement method including measuring, by using a piezoelectric sheet sensor in contact with a measurement object, vibration transmitted from the measurement object to the piezoelectric sheet sensor and measuring pressing force between the measurement object and the piezoelectric sheet sensor.
Claims16
A measurement method, comprising:
- measuring, by using a piezoelectric sheet sensor in contact with a measurement object, vibration transmitted from the measurement object to the piezoelectric sheet sensor;
- and
- measuring a pressing force between the measurement object and the piezoelectric sheet sensor, wherein
- in the measuring of the pressing force, the pressing force between the measurement object and the piezoelectric sheet sensor is measured based on a signal generated between a pressing force measurement electrode arranged on a first surface of a sheet-like piezoelectric body and a second electrode arranged on a second surface of the sheet-like piezoelectric body,
- in the measuring of the vibration, the vibration transmitted from the measurement object to the piezoelectric sheet sensor is detected based on a signal generated between a vibration measurement electrode arranged on the first surface of the sheet-like piezoelectric body and the second electrode, and
- the pressing force measurement electrode is electrically separated from the vibration measurement electrode.
3 more elements
A measurement apparatus, comprising:
- a piezoelectric sheet sensor configured to come into contact with a measurement object;
- and
- a measurement control unit configured to use the piezoelectric sheet sensor to measure vibration transmitted from the measurement object to the piezoelectric sheet sensor and a pressing force between the measurement object and the piezoelectric sheet sensor, wherein
- in the measurement of the pressing force, the pressing force between the measurement object and the piezoelectric sheet sensor is measured based on a signal generated between a pressing force measurement electrode arranged on a first surface of a sheet-like piezoelectric body and a second electrode arranged on a second surface of the sheet-like piezoelectric body,
- in the measurement of the vibration, the vibration transmitted from the measurement object to the piezoelectric sheet sensor is detected based on a signal generated between a vibration measurement electrode arranged on the first surface of the sheet-like piezoelectric body and the second electrode, and
- the pressing force measurement electrode is electrically separated from the vibration measurement electrode.
3 more elements
A piezoelectric sheet sensor, comprising:
- a vibration measurement electrode and a pressing force measurement electrode arranged on a same side of a common sheet-like piezoelectric body, wherein
- the vibration measurement electrode is electrically separated from the pressing force measurement electrode, and
- a first period for measuring a vibration at least partially overlaps a second period for measuring pressing force.
Dependencies are inferred from the claim text.