Apparatus subject to random accelerative motion for sensing moti

Details Apparatus subject to random accelerative motion for sensing moti Apparatus subject to random accelerative motion for sensing moti

1985-01-31

1987-08-04

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

324225, 310328, G01B 714, G01N 2772, G01R 3300, H01L 4104

Patent

active

046848886

ABSTRACT:
A magnetically susceptible part motion sensor where the sensor is subject to random accelerative conditions. The sensor comprises a first accelerometer and magnet combination and a second accelerometer and nonmagnetic body combination. The accelerometers are substantially identical and the nonmagnetic body is substantially identical in weight, size and other characteristics to the magnet. Therefore the signal produced by the accelerometers due to random accelerative motion are identical but the first accelerometer produces a signal component corresponding to the passage of the magnetically susceptible part. A differential amplifier is connected to receive the outputs of the two accelerometers and to produce an output signal corresponding substantially only to the passage of the magnetically susceptible part.

REFERENCES:
patent: 3221213 (1965-11-01), McKinney
patent: 3750010 (1973-07-01), Abnett et al.
patent: 3988620 (1976-10-01), McDavid
patent: 4409548 (1983-10-01), Focht

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