Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1982-08-04
1985-11-26
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324239, G01B 710, G01R 3312
Patent
active
045556652
ABSTRACT:
A method and apparatus are provided for effecting the inspection of a ferromagnetic element, or piping, and particularly piping that is already installed. The invention incorporates a device for indicating wall thickness of a length of the ferromagnetic element, including means for producing a value of magnetic flux extending longitudinally through a portion of the element. A voltage generating device is disposed in surrounding relationship to the element and is movable axially relative to the length of the element containing the value of the magnetic flux. Means for indicating the voltage generated in the voltage generating means by the value of the magnetic flux also are provided. A saturation level of magnetic flux is induced by a multi-turn supplied with electrical current sufficient to produce saturation. The voltage induced in a central pickup coil is amplified, integrated and correlated to average thickness of the pipe. The differential of the voltages generated by the two end pickup coils is amplified, integrated and correlated to discontinuities from the average thickness.
REFERENCES:
patent: 2982888 (1961-05-01), Whearley
patent: 4292588 (1981-09-01), Smith
Bradfield James E.
Knauer, Jr. Robert C.
Milewits Marvin
Stanley Roderic K.
PA Incorporated
Snow Walter E.
Strecker Gerard R.
LandOfFree
Magnetic flux method for measuring tubular wall thickness does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic flux method for measuring tubular wall thickness, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic flux method for measuring tubular wall thickness will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-271409