An inductive method for estimating the composition and size of metal particles
I M Flanagan; J R Jordan; H W Whittington; I M Flanagan; Dept. of Electr. Eng., Edinburgh Univ., UK; J R Jordan; Dept. of Electr. Eng., Edinburgh Univ., UK; H W Whittington; Dept. of Electr. Eng., Edinburgh Univ., UK
Журнал:
Measurement Science and Technology
Дата:
1990-05-01
Аннотация:
A method for estimating the composition and size of metal particles is described. An inductive coil sensor is used which, on the introduction of a metal particle, changes impedance. The nature of the impedance change, for a given coil, depends on the composition and size of the particle which can be detected by incorporating the coil into a marginal oscillator circuit and effecting amplitude and frequency demodulation. Experimental results are given for various materials and an application of the method to lubricant wear-debris condition monitoring is described.
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