The measurement system of magnetomechanical coupling coefficient for giant magnetostrictive materials has been built by using a lock-in amplifier, according to the measurement theory.

• 根据磁机械耦合系数的测量原理,利用锁相放大器建立了磁机械耦合系数测量系统,并应用该系统测量了巨磁致伸缩材料的磁机械耦合系数。