Method for eliminating spurious signals in a measuring installat

Details Method for eliminating spurious signals in a measuring installat Method for eliminating spurious signals in a measuring installat

1984-07-19

1986-12-23

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

128777, 324225, 328165, G01B 714, A61B 510

Patent

active

046314776

ABSTRACT:
A method for measuring the position, attitude and/or positional or attitudinal change of a fixed body in space, such as the lower jaw of a patient in a dental examination, utilizes signals obtained from a number of magnetic flux pickup blocks arranged at a distance from a magnetic field generator, the magnetic field generator being disposed on or a short distance from the fixed body and generating a defined irregular field. The pickup blocks detect the field flux, or the field flux alteration, during a measurement. In order to eliminate interference signals occurring in the region of the measuring system the signals from all of the pickup blocks are first added and the aggregate interference signals formed therefrom are respectively subtracted from the individual pickup block signals.

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