Inductive transducer with calibrating balancing core for measuri

Electricity: measuring and testing – Magnetic – Displacement

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Details

324173, 324202, 32420712, 32420723, 376258, G01B 714, G01P 342, G01R 3500, G21C 1700

Patent

active

051171813

ABSTRACT:
The invention makes it possible to detect and measure the movement of a moving member (50) through an amagnetic or low permeability metal wall. The installation requires ferromagnetic material targets placed at regular intervals over the moving member. The transducer is positioned facing the moving member by its detection face (16). It comprises two ferromagnetic cores (2, 8) surrounded both by an exciting coil (4) and a measuring coil (10), at whose terminals the measuring signal is taken. The latter is proportional to the variable reluctance of the magnetic circuit, which varies as a function of the position of the ferromagnetic targets (48). The transducer is completed by a balancing core (34). Application to the measurement of the displacement of control rods in the vessel of a pressurized water reactor.

REFERENCES:
patent: 3246219 (1966-04-01), Devol et al.
patent: 3290487 (1966-12-01), Scott
patent: 3617874 (1971-11-01), Forster
patent: 3863235 (1975-01-01), McKee et al.
patent: 4430615 (1984-02-01), Calvert
patent: 4786869 (1988-11-01), Kanai et al.
patent: 4810964 (1989-03-01), Granberg et al.

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