摘要
水听器是医学超声定量检测标准器,对其灵敏度的准确测量是进行声场参数计量的基础,也是保障超声诊断、理疗和治疗设备安全性的关键环节。为了解决水听器的空间平均效应引起灵敏度误差增大的问题,在使用比较法校准水听器时,采用了基于空间平均效应修正的水听器校准方法。首先在脉冲波下扫描声场得到各频点下的声束宽度,然后结合水听器的有效直径建模得到空间平均修正模型,最后引入修正模型。通过实验与修正前的结果进行比较,修正后的平均相对误差减小了4.1%,测量不确定度为1.3 dB(k=2),验证了该方法的有效性。
The hydrophone is a quantitative detection standard in medical ultrasound,and the accurate measurement of its sensitivity is the fundamental for the measurement of sound field parameters and a key link to ensure the safety and effectiveness of ultrasound diagnostic,physical therapy and treatment equipment.In order to solve the problem of increasing sensitivity error caused by the spatial averaging effect of hydrophones,A calibration method based on the spatial averaging effect correction is proposed when using the comparison method to calibrate the hydrophones.Firstly,the sound field is scanned under the pulse wave to obtain the sound beam width at each frequency point,and then the spatially averaged correction model is modeled with the effective diameter of the hydrophone,finally the correction model is introduced.By comparing the experimental results with those before correction,the average relative error is reduced by 4.1%after correction,and the measurement uncertainty is 1.3 dB(k=2),and the experimental results verified the effectiveness of the method.
作者
鲁宗蕊
钱飞明
邢广振
陈洋
杨博
LU Zong-rui;QIAN Fei-ming;XING Guang-zhen;CHEN Yang;YANG Bo(College of Information Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China;College of Instrument Science and Engineering,Harbin Institute of Technology,Harbin,Heilongjiang 150006,China;National Institute of Metrology,Beijing 100029,China;College of Mechanical and Electrical Engineering,Guangzhou University,Guangzhou,Guangdong 510000,China)
出处
《计量学报》
CSCD
北大核心
2023年第12期1856-1862,共7页
Acta Metrologica Sinica
基金
国家自然科学基金(11904347)
广州市科技计划(202102020313)。
关键词
计量学
水听器
空间平均效应
校准
超声检测
metrology
hydrophone
spatial averaging effect
calibration
ultrasonic testing
