Inductance sensor and circuit arrangement for the detection of v

Details Inductance sensor and circuit arrangement for the detection of v Inductance sensor and circuit arrangement for the detection of v

1988-01-15

1989-08-08

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

324236, 34087031, G01B 714, G08C 1906

Patent

active

048560987

ABSTRACT:
A circuit for the detection of vehicle attitude, comprising a signal sensor, which is arranged inside the cylinder of a shock absorber and coaxial with the piston thereof. The sensor cooperates with a processor for receiving and processing the sensor signals. The sensor includes a first coil electrically connected to a second coil. The free ends of the coils are electrically connected to capacitive circuit means so as to form a variable-frequency resonant circuit fed by an AC power supply through suitable terminals. The circuit is connected to the inputs of parallel processors which convert the frequencies of the variable signal controlled by the sensor and of the fixed signal provided by the power supply to variable-voltage signals, respectively. Both converted signals are applied to a comparator circuit at the output terminals of which any voltage change is measured so as to detect any relative position change of the piston with respect to the cylinder.

REFERENCES:
patent: 3022451 (1962-02-01), Chapman et al.
patent: 3255405 (1966-06-01), French
patent: 3737764 (1973-06-01), Dufayet
patent: 3891918 (1975-06-01), Ellis
patent: 4103233 (1978-07-01), Timmermans et al.
patent: 4350954 (1982-09-01), Seilly
patent: 4629983 (1986-12-01), Boomgaard et al.

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