Strain within a substrate is measured by attaching thereto a magnetic circuit comprising a magnetostrictive, soft ferromagnetic element, and sensing a change in the coercive field of the element caused by strain therewith....http://www.google.fr/patents/US5142227?utm_source=gb-gplus-shareBrevet US5142227 - Method and apparatus for measuring strain within a ferromagnetic material by sensing change in coercive field
Method and apparatus for measuring strain within a ferromagnetic material by ...
