In-line metallic debris particle detection system

Details In-line metallic debris particle detection system In-line metallic debris particle detection system

1988-12-27

1990-05-15

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Fluid material examination

324636, 324698, 324650, 340631, G01V 300, G01R 3312

Patent

active

049261207

ABSTRACT:
An arrangement for detecting metallic particles carried by a fluid includes a metallic probe member which surrounds an elongated passage through which the fluid flows and which is constituted by a split tube having two marginal portions delimiting a gap which extends along said passage and completely separates the marginal portions from one another. Capacitors are arranged at the gap and alternating electric current is caused to flow in the probe member around the passage so that the probe member and the capacitors form a tank circuit having resonance characteristics that are influenced by any inclusion then present in the passage in a manner dependent on the electromagnetic properties of the inclusion. The character of any metallic particle then present in the passage is determined from variations in the alternating electric current that reflect the influence of such metallic particle on the resonance characteristics.

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patent: 4435680 (1984-03-01), Froncisz
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patent: 4553094 (1985-11-01), Gehrke
patent: 4570137 (1986-02-01), DiSilvestro
patent: 4623835 (1986-11-01), Mehdizadeh
patent: 4654598 (1987-03-01), Arulanandan
patent: 4721913 (1988-01-01), Hyde
patent: 4724389 (1988-02-01), Hyde

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