EDDY CURRENT INSPECTION DEVICE

摘要

An eddy current inspection device (11) detects material irregularities in electrically conductive composite materials and employs a metallic shoe (63) for passively modifying the eddy current penetration depth. The device also employs a sensor head (15) including a transmitter coil (35) and an oscillator (31) for pulsing the transmitter coil (35) at a selected frequency to induce an eddy current in the composite material. A receiver coil (41) having first and second sections is arranged such that one section is positioned outside the transmitter coil (35), the first and second sections being connected with their respective outputs opposite.