Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1986-11-24
1989-11-21
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324 57Q, 324 61QL, G01R 2726, G01R 2702
Patent
active
048825352
ABSTRACT:
An electronic device for monitoring changes in characterizing properties of a tested sample by observing displacements of a selected point on a curve of a frequency spectrum of a tested sample. The device includes a generator for generating at least one continuous wave of a predetermined constant frequency and a constant amplitude, or for generating a continuous wave of a predetermined frequency modulation about a constant frequency and amplitude, a resonator applicable to a tested sample to form a resonating system, the system being connected in circuit to the generator and driven thereby when the continuous wave is passed therethrough, and a circuit for continuously demodulating the output signal of the resonating system to form an amplitude modulated waveform representative, of the instantaneous displacements of the selected point occuring when the continuous wave is passed through the tested sample. The waveform is capable of being displayed for real time monitoring of property changes of the tested sample. A method for monitoring changes in characterising properties of a tested sample is also provided.
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Anon, Method of and Apparatus for Selectively Measuring the Amount of at Least One Material in a Combination of Two Materials, 1-1975, pp. 35-36.
Eisenzopf Reinhard J.
Harvey Jack B.
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