REDUCTION OF CROSSTALK IN ROW-COLUMN ADDRESSED ARRAY PROBES

Techniques for reducing or eliminating cross talk in row-column addressed array (RCA) probes are described. A diode can be connected in series to piezo-composite element in each pixel of the RCA to prevent cross talk. A resistor can also be provided in parallel to the piezo-composite element for dis...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG, Jin-Chi, MAHIEU, Gautier, LANDRY, Frédéric
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
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Beschreibung
Zusammenfassung:	Techniques for reducing or eliminating cross talk in row-column addressed array (RCA) probes are described. A diode can be connected in series to piezo-composite element in each pixel of the RCA to prevent cross talk. A resistor can also be provided in parallel to the piezo-composite element for discharging purposes and providing DC paths for the forward and backward bias voltages to the diodes. Thus. RCA probes using the techniques disclosed herein can use sub-apertures for, among other things, inspecting longitudinal and transverse flaws, and for more efficient local focusing for an acoustic camera without significant cross talk interference.