TUBE INSPECTION UNIT WITH EDDY CURRENT PROBE AND CORRESPONDING METHOD

The invention relates to a tube inspection unit (10) comprising an eddy current probe (14), said probe (14) having a plurality of inductors and a plurality of receivers. The receivers are magnetoresistors having a substantially linear functional zone. The inductors of the probe (14) are linked to a controller (26). The controller (26) is programmed to inject into the inductors a voltage with a sinusoidal component and a non-zero direct-current component, such that the receivers have a polarization centre situated inside the substantially linear functional zone. 本发明涉及一种管道检查单元(10)，其包括涡流探头(14)，该探头(14)具有多个电感器和多个接收器。接收器是具有实质上线性的功能区域的磁致电阻。探头(14)的电感器连接至控制器(26)。控制器(26)被编程为向电感器中注入具有正弦分量和非零直流分量的电压，使得接收器具有位于实质上线性的功能区域内部的极化中心。