Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1983-09-30
1984-09-25
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
73517B, 310319, 310330, H01L 4108
Patent
active
044737688
ABSTRACT:
A strong-motion force-balance accelerometer system responsive to accelerations along the axis of its housing, and having an annular diaphragm fixed with respect to the housing normal to the axis, the diaphragm having a winding extending around the periphery of the diaphragm and forming with the diaphragm the proof mass of the accelerometer system, a transducer disc fixed to the surface of the diaphragm and operative to flex with the diaphragm and generate a voltage in response to displacement thereof, a magnetic flux path having an annular flux gap around the periphery of the diaphragm, the gap being occupied by the winding, and an amplifier circuit including a forward amplifier connected to receive the voltage generated by the transducer disc and to deliver an output signal in response to displacement of the diaphragm and the circuit including a feed back amplifier connected to said output signal and operative to feed back current to the winding tending to opposed displacement of the diaphragm.
REFERENCES:
patent: 3120622 (1964-02-01), Dranetz et al.
patent: 3229531 (1966-01-01), Stiles
patent: 4186324 (1980-01-01), Hartzell, Jr.
Kerr James D.
Thompson Howard
Budd Mark O.
Teledyne Industries Inc.
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