AUTOMATIC IMPEDANCE MATCHING FOR EMAT

An automatic impedance matching system that can read the input impedance of an EMAT electrical circuit and automatically select the appropriate impedance matching by combining components from a built-in selection of matching circuitry. A Vector Network Analyzer or similar impedance measuring circuit...

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Bibliographic Details
Main Authors Lopez Jauregui, Borja, Huggins, Nathaniel Quinn, Cox, Philip Haywood
Format Patent
LanguageEnglish
Published 02.05.2024
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
RESONATORS
TESTING
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Summary:An automatic impedance matching system that can read the input impedance of an EMAT electrical circuit and automatically select the appropriate impedance matching by combining components from a built-in selection of matching circuitry. A Vector Network Analyzer or similar impedance measuring circuit is connected to the EMAT electrical circuit and measures the impedance of the EMAT RF coil, coil cable, and conductive material to be inspected at a given material lift-off, and relies on the information to the system processor. The processor uses this information to adjust the overall impedance by selecting appropriate capacitors and transformer taps on a programmable impedance matching circuit connected between the system pulser/receiver and the RF coil cable. The system can work in either pulse-echo (same transmitter and receiver) or pitch-catch (different transmitter and receiver).
Bibliography:Application Number: US202217976539