Richard P. Reiff
Engineers at Blueflax Dr, Pueblo, CO
License number
Colorado 19115
Issued Date
Feb 19, 1982
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
4364 Blueflax Dr, Pueblo, CO 81001
Professional information
Transverse Crack Detection In Rail Head Using Low Frequency Eddy Currents
US Patent:
2003002, Jan 30, 2003
Filed:
Jul 17, 2001
Appl. No.:
09/907249
Inventors:
Gopichand Katragadda - San Antonio TX, US
Douglas Earnest - San Antonio TX, US
Gregory Garcia - Pueblo CO, US
Richard Reiff - Pueblo CO, US
Douglas Earnest - San Antonio TX, US
Gregory Garcia - Pueblo CO, US
Richard Reiff - Pueblo CO, US
International Classification:
B61K009/10, G01N027/82
US Classification:
324/217000
Abstract:
A method and system for detecting transverse cracks beneath horizontal cracks in the rail way track. As a transporter moves over rail, a saturation magnetic field is generated into and across the rail head using a toroidal-shaped DC saturation magnet located a predetermined distance above the rail head. Any transverse cracks in the rail head are detected with a low frequency eddy current probe mounted centrally between the opposing pole ends of the DC magnet and over the rail head. A force is applied to the low frequency eddy current probe to hold the probe towards the rail head as the transporter moves on the rail so as to follow the wear pattern of the rail head and to minimize lift-off. A second sensor is used to sense the presence of non-relevant indications that falsely indicate possible transverse cracks by the low frequency eddy current probe.