巨磁致伸缩材料磁机械耦合系数的测量

Measurement of Magnetomechanical Coupling Coefficient for Giant Magnetostrictive Materials

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.测试结果表明,采用锁相放大器技术所测得的磁机械耦合系数是准确可靠的.

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. The magnetomechanical coupling coefficient has been measured in the system and it has been shown that the measurement valu-e of the magnetomechanical coupling coefficient is accurate and reliable.