Digital filtering of EL CID data

Details Digital filtering of EL CID data Digital filtering of EL CID data

1992-09-15

1994-06-14

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of ground fault indication

324545, 324551, 340647, G01R 3114

Patent

active

053213629

ABSTRACT:
An electrical generator inspection system comprises an electro-magnetic core imperfection detector that provides an analog signal representative of fault currents detected between adjacent laminations of a stator core; an analog-to-digital converter coupled to the detector for converting the analog signal to a digital signal; a digital filter coupled to the output of the converter for digitally filtering the digital signal to remove noise therefrom; and means for storing predetermined signal criteria and for comparing the filtered digital signal to the predetermined criteria to determine the location of the insulation defects along the stator core. In one embodiment, the system further comprises means for storing the filtered digital signal in a memory.

REFERENCES:
patent: 4301399 (1981-11-01), Miller et al.
patent: 4803563 (1989-02-01), Dailey et al.
patent: 4825422 (1989-04-01), Takeda
patent: 4889000 (1989-12-01), Jaafar et al.
patent: 4970890 (1990-11-01), Jaafar et al.
patent: 4996486 (1991-02-01), Posedel
patent: 5032826 (1991-07-01), Miller et al.
patent: 5105658 (1992-04-01), Jaafer et al.

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