Patent ID: 6911826
Filing Date: 2005-06-28
Classification: G01N

Abstract:
1. A pulsed eddy current sensor probe comprising: a sensor array board; a plurality of sensors arranged on said sensor array board and operable to sense and generate output signals from the transient electromagnetic flux in a part being inspected, each of said sensors having a differential output comprising a positive and a negative output, wherein said sensors are positioned at an edge of said sensor array board, and each of said sensors has an axis of sensitivity that is oriented substantially normal to said edge; at least one drive coil disposed adjacent to said sensors and operable to transmit transient electromagnetic flux into the part being inspected; a first multiplexer arranged on said sensor array board and operable to switch between said sensors; and a second multiplexer arranged on said sensor array board and operable to switch between said sensors, wherein said first multiplexer is connected to the positive outputs of said sensors, and wherein said second multiplexer is connected to the negative outputs of said sensors.