Through the spread time of ultrasonic signal is processed by digital correlation method, measuring the velocity of ultrasonic speedily and accurately is achieved.
Through the spread time of ultrasonic signal is processed by digital correlation method, measuring the velocity of ultrasonic speedily and accurately is achieved.
利用超声脉冲回波法在温度箱内测定了某合金材料在－20℃~60℃的弹性常数，研究了温度对该材料弹性模量的影响。