Position and velocity sensors

Details Position and velocity sensors Position and velocity sensors

1976-08-20

1978-07-11

Goldberg, Gerald

Electricity: power supply or regulation systems

Remote sensing

101 9309, 323 52, 323 92, 340199, 324207, G05F 700

Patent

active

041004809

ABSTRACT:
A sensor of the linear voltage differential transformer (LVDT) type is described, with a moveable core, which has both high permeability and magnetic retentivity, to thereby provide both position and velocity signals. Also described are various embodiments of a position sensor which provides a position signal of the same amplitude, example a null, whenever the sensor's core is at any one of controllable selected positions within the sensor. Any of these sensors may include a core with magnetic retentivity to provide a velocity signal. A servo control system is disclosed, utilizing the position signals from one of the sensors, as described, to control the positioning of an element at either of two positions.

REFERENCES:
patent: 2555853 (1951-06-01), Irwin
patent: 2764019 (1956-09-01), Lindholm et al.
patent: 3085191 (1963-04-01), Sleeper
patent: 3225289 (1965-12-01), Koppel
patent: 3244956 (1966-04-01), Mierendorf
patent: 3911814 (1975-10-01), Helms et al.
patent: 3943443 (1976-03-01), Kimura et al.
Electronics World, Dec. 1968, pp. 47-50, 66, 67, "Differential Transformers", by S. L. Silver.
Schmintz Info. Trans. Mod. & Noise; McGraw Hill; Jan. 30, 1959; "LVDT Application Note S9-14", pp. 1-8.

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