【作者】 韩丽娜； 张小凤；

【Author】 HAN Li-na;ZHANG Xiao-feng;Key Laboratory of Ultrasonic Shaanxi Province, School of Physics and Information Technology Shaanxi Normal University;

【机构】 陕西省超声学重点实验室陕西师范大学物理学与信息技术学院；

【摘要】 本文提出了两种方法探究生理盐水溶液的声阻抗,两种方法均是以实验回波信号为基础建立了参数模型,第一种方法结合了以蒸馏水为标准液的系统校验法对声阻抗进行估计,第二种是通过比重瓶测得生理盐水的密度之后,结合参数模型法对声速的估计,然后通过计算得出生理盐水的声阻抗。结果表明,两种方法均能有效准确的估计出生理盐水的声阻抗。更多还原

【Abstract】 This paper presents two methods to explore the acoustic impedance of the saline solution. The parameters model are established based on the experimental results for the two methods. The difference of the two methods is that the first method estimates the acoustic impedance combined with distilled water for standard solution of system calibration method,while the second method compute the acoustic impedance by combined measurement of the saline density using the proportion method with the parameter model method of velocity estimation. The results show that the two methods can effectively and accurately estimate the acoustic impedance of normal saline.更多还原