Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1988-12-29
1990-03-06
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324242, 328167, 328168, 341139, G01N 2782, G01R 3312, G01R 1925, H03M 118
Patent
active
049069284
ABSTRACT:
A transient electromagnetic apparatus for use in detecting irregularities on conductive walls of containers forms a multichannel distributed system and includes at least one transmitting antenna, at least one transmitter unit, plural receiving antennas, plural receiver units, and a computer for controlling the transmitter and receiver units. The receiver units each include elements that suppress noise in the received signals. Each receiver unit has a preamplifier, first and second low pass Bessel type filters, a gain ranging amplifier, and an A/D converter. The gain ranging amplifier receives feedback from the output of the A/D converter and provides increased small signal resolution. Each receiver unit also rejects common mode noise with a choke and balanced input impedances in the preamplifier. The apparatus allows an arbitrary number of receiving antennas, receiver units, and even transmitting antennas, and transmitting units, so that the apparatus can be configured to a variety of containers. Each receiver unit has control logic for controlling the electronics therein and memory for storing data for transfer to the computer. The apparatus includes a median filter for filtering out sferics noise.
REFERENCES:
patent: 3685047 (1972-08-01), Sherer et al.
patent: 3707672 (1972-12-01), Miller et al.
patent: 3737768 (1973-06-01), Lazenby et al.
patent: 3790886 (1974-02-01), Kurtin et al.
patent: 3819864 (1974-06-01), Carroll et al.
patent: 4016557 (1977-04-01), Zitelli et al.
patent: 4027281 (1977-05-01), Greve et al.
patent: 4247821 (1981-01-01), Buselli et al.
patent: 4600356 (1986-07-01), Bridges et al.
patent: 4717006 (1988-01-01), Chapman et al.
patent: 4831378 (1989-05-01), Baars et al.
patent: 4843320 (1989-06-01), Spies
Bednar, "Applications of Median Filtering to Deconvolution, Pulse Estimation, and Statistical Editing of Seismic Data", Geophysics, vol. 48, No. 12 (Dec. 1983), pp. 1598-1610.
McCracken et al., "A Comparison of Electromagnetic Exploration Systems", Geophysics, vol. 51, No. 3 (Mar. 1986), pp. 810-818.
Ott, "Noise Reduction Techniques in Electronic Systems", John Wiley & Sons, pp. 91-97.
Atlantic Richfield Company
Mantooth Geoffrey
Strecker Gerard R.
LandOfFree
Transient electromagnetic apparatus with receiver having digital does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transient electromagnetic apparatus with receiver having digital, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transient electromagnetic apparatus with receiver having digital will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-49627