Torque sensors using wire explosion magnetostrictive alloy layers

The wire explosion spraying technique was applied to prepare magnetostrictive layers with strong adhesion to substrates. It has been shown that the Ni, Fe-Ni and Fe-Co-Ni layers sprayed in the form of chevron on stainless steel shafts are applicable to constitute torque sensors showing very linear output-torque characteristics with almost zero hysteresis in combination with a two-core type multivibrator bridge circuit.