The principle of the ultrasonic method applied to measure elastic coefficient is by measuring the velocity of ultrasonic摘要弹性系数的超声检测，即借助固体弹性常数与超声波波速间的固有关系，通过测量纵波及横波在固体中的传播速度来获取材料的弹性模量、剪切模量及泊松比。