Non-Contact Stress Measuring Device

Author:  Kevin Allan Dooley
Source:  US Patent 9,128,063
Doc ID:  2015060
Year of Publication:  2015
Abstract:  
Apparatus and methods for measuring stress or strain in a conductive material without physical contact with the material are provided. The device comprises an inductor circuit configured to induce an alternating current into the material along a first path; and a detector configured to detect a signal representative of the stress in the material along the first path when current is induced in the material.