Vibration wave detecting method and vibration wave detector
AssigneeSumitomo Metal Industries, Ltd.
InventorsShigeru Ando, Muneo Harada
Life of this patent
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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. It is possible to control a gain of a specific frequency band by changing a voltage to be applied to the parallel circuit or changing the resistance value of each piezoresistor.
Claims27
A vibration wave detecting method comprising:
- transmitting a vibration wave to be detected through a plurality of resonators, each having a different resonant frequency and being provided with a detector;
- and
- detecting an electric output generated by resonance of said each resonator at the resonant frequency by adjusting a gain of said electric output.
A vibration wave detector comprising:
- a plurality of resonators, each resonating at each different specific frequency;
- and
- a plurality of detectors, each detecting an electric output generated by resonance of each resonator at said frequency due to a vibration wave to be detected that has bees transmitted to each resonator,
- wherein said each detector is an electric-output variable gain detector in each resonator.
A vibration wave detector comprising:
- a vibration-wave input section for receiving a vibration wave to be detected;
- a plurality of resonators each of which resonates at a different specific frequency;
- a transmitting section for transmitting the vibration wave received by said vibration-wave input section to said resonators;
- a plurality of detectors each of which detects an electric output generated by resonance of each resonator at said frequency due to the vibration wave that has been transmitted to each resonator;
- and
- an adjusting device for adjusting a gain of an electric output of each resonator by adjusting a voltage to be applied to each detector.
A vibration wave detector comprising:
- a plurality of resonators, each resonating at the same specific frequency;
- and
- a plurality of detectors, each detecting an electric output generated by resonance of each resonator at said frequency due to a vibration wave to be detected that has been transmitted to each resonator,
- wherein said each detector is an electric-output variable gain detector in each resonator.
Dependencies are inferred from the claim text.