Multielement inductive sensor for non-destructive testing of electrically conducting components; has matrix of identical windings on flexible support and means of reversing their currents

摘要

A matrix of identical coils (1) is fixed to a flexible support (2), which may be applied to flat or curved surfaces. Each coil is associated with a device (4) to measure terminal voltage and a device (5) to reverse its exciting current. An electrical supply (7) is connected to the matrix through a multiplexor (6) which allows the coils to operate as transmitters or receivers and the exciting current to be reversed