A versatile magnetostrictive displacement transducer

摘要: A magnetostrictive displacement transducer of exceptional versatility is obtained by forming a wire into helical spring. Displacements producing extension or compression the spring are transformed this configuration torsional strains within element. The biaxial principal stresses establish preferred orientations which helically disposed around axis. sense magnetization these domains switched alternating current pulses through wire. degree anisotropic orientation sensed as emf induced in solenoid wound along Simplified theory predicts range approximately linear response supported measurements on prototypes. device derives from wide attainable compliance. This flexibility allow construction simples devices with useful displacements 10−3 to 102 mm indicating applications similar those LVDTs.