Monks J.S.,Innerspec Technologies Inc.
Iron and Steel Technology | Year: 2010
The in-line electromagnetic acoustic transducers (EMAT) ultrasonic weld inspection method used for ERW tube mills using guided ultrasonic waves is presented. The interaction of elastic waves in the presence of a magnetic field induces currents in the receiving EMAT coil circuit. The magnetostriction produces additional stresses for ferromagnetic conductors that enhance the signals to much higher levels than could be obtained by the Lorentz force alone. The guided waves for ERW weld inspection offer several advantages such as guided waves fill the volume of the material independent of thickness, enabling inspection of the entire weld, and detect hook cracks, zipper welds, lack of fusion. Other advantages include that separate transmitter and receiver permits normalization of the signal for self-calibration, and allows for up to 55° of weld drift with a minimum amount of sensors, resulting in cost-effective systems, easier to install and maintain.
ultrasonic or electromagnetic acoustic transducer carbon steel inspection system comprised of optical, sonic and/or magnetic sensors, computer hardware, display and keyboard, and related mechanical hardware.
Innerspec Technologies Inc. | Date: 2009-04-14
Electronic circuit cards for use in high-power ultrasonic testing; software for use in controlling and operating electronic instruments used in conducting high-power ultrasonic testing.
Innerspec Technologies Inc. and The Babcock & Wilcox Company | Date: 1995-12-26
Innerspec Technologies Inc. | Date: 2008-09-30
Ultrasonic equipment, namely, ultrasonic electromagnetic acoustic transducer instruments for use in non-destructive testing.