Electricity: measuring and testing – Magnetic – Magnetic sensor within material
Patent
1982-01-29
1984-09-18
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetic sensor within material
307234, 307360, 324140R, 328111, G01N 2782, G01R 3312, G01R 19165, H03K 522
Patent
active
044726805
ABSTRACT:
An electrical signal representative of the detection of a mechanical coupling within a string of tubular goods is coupled into one input of each of a pair of parallel configured comparators. When the input signal level exceeds the value of complimentary reference levels the respective comparator generates an output signal. The composite output signal from the comparators is converted to a d.c. level which is compared to a fixed reference potential related to the duty cycle of a typical input signal. The comparator output signal is integrated and the peak value of which is stored by a peak detector. In the preferred embodiment the peak value is converted into digital form by an analog-to-digital converter.
REFERENCES:
patent: 2967994 (1962-01-01), Peterson
patent: 3434046 (1969-03-01), Wilson et al.
patent: 4131857 (1978-12-01), Clymer
patent: 4162453 (1979-07-01), Rudolph
patent: 4208627 (1980-06-01), Ebert
patent: 4217506 (1980-08-01), Sawyer et al.
Patent Application Ser. No. 963,875-Lichtenberg et al., Abstract.
Byron Richard M.
Dresser Industries Inc.
McCollum Patrick H.
Strecker Gerard R.
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