Patent ID: 7282822
Filing Date: 2007-10-16
Classification: G01H,G01P

Abstract:
1. A method of indicating and sensing a deviation, caused to a pertinent part in relation to a permanent state, whereby said detection is based upon a temporary inner material oscillation, a so called acoustic emission in real time, whereby a deviation dependent element being at least partly surrounded by one or more multi-turn coils, wherein: one or more band formed elements are applied in a freely suspended manner to said pertinent part, said band element is formed from an amorphous and/or nano-crystalline material, said band formed element is influenced by a bias magnetization, by applying a direct current through a pickup coil and/or using a permanent magnet, said deviation being transferred to said band element by causing internal atomic movements (oscillations) within said band element, and said deviation is causing an indication and a sensing of a detectible magnetic flow change (dB/dt) within said coil in proportion to said atomic movement or an indication and sensing of a detectable inductance change within said coil.