Electricity: measuring and testing – Magnetic – Fluid material examination
Patent
1993-10-28
1996-01-16
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Fluid material examination
324234, 324633, 324655, 340631, G01N 2774, G01R 3312
Patent
active
054850835
ABSTRACT:
A system for sensing metallic debris in fluid flow, including an inductive probe utilizing one or more capacitors with a single turn resonant coil disposed about the flow passageway wherein a second, co-linear, multiple turn coil is provided about the passageway and loosely coupled via mutual inductance to the resonant coil such that the two windings produce a step-up transformer with increased impedance to closely match the impedance of the electrical output cable. This impedance matching reduces output signal loss permitting the sensitive components of the system to be remotely located from the usually hostile environment of the probe. Additionally, a toroid element of low loss, low reluctance material is disposed between the probe and its conductive housing to provide a guiding path for the magnetic "lines of force" of the sensing field produced by the probe, to avoid losses in the housing.
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patent: 4926120 (1990-05-01), Veronesi et al.
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patent: 5041856 (1991-08-01), Veronesi et al.
patent: 5146164 (1992-09-01), Masui et al.
Casella Anthony J.
Hespos Gerald E.
Smiths Industries
Strecker Gerard R.
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