Vibration wave detecting method and vibration wave detector
US6223601A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1999 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | May 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H11/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vibration wave detector in which: a plurality of resonator beams, each having a different length and being allowed to resonate at a specific frequency, are provided; a piezoresistor is installed in each resonator beam; and the piezoresistors are parallel-connected so that vibration is converted to an electric signal by the piezoresistors so as to output the sum of vibration waveforms at the respective resonator beams. Utilizing the fact that the magnitude of strain is different depending on positions on the resonator beam, the installation position of the piezoresistor is adjusted on each of the resonator beams so as to set the level of an output signal from each frequency band at a desired level; thus, it becomes possible to control the gain of a specific frequency band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.