Temperature compensated permanent magnet/moving coil acceleromet

Details Temperature compensated permanent magnet/moving coil acceleromet Temperature compensated permanent magnet/moving coil acceleromet

1977-09-21

1978-12-05

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

Temperature compensator

73517B, 335217, G01P 1508

Patent

active

041280105

ABSTRACT:
A temperature compensated accelerometer of the type having a permanent magnet, moving coil rebalance system is disclosed. A cylindrical permanent magnet and surrounding sleeve produce radial magnetic fields in annular regions in which are located rebalance coils on a suspended bobbin. A noninductive temperature sensing winding on the magnet is connected in a bridge input circuit to an amplifier which produces a current in an auxillary winding for augmenting the fields produced by the permanent magnet so as to maintain constant magnetic field strength in the annular regions.

REFERENCES:
patent: 2591921 (1952-04-01), Cosgriff et al.
patent: 2888256 (1959-05-01), Sedgfield
patent: 3152485 (1964-10-01), Lones
patent: 3613454 (1971-10-01), McFadin

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