摘要
为了提高利用小孔反射法测量超声波扩散角的准确度,采用多点测量获得小孔反射波强度分布曲线,通过数据处理软件得到此分布曲线的半峰全宽,在此基础上校正小孔尺寸对测量结果的影响.
To increase the accuracy of detecting the divergence of ultrasonic beam by the pinhole reflection method, the intensity distribution curve of the ultrasonic beam reflected by a pinhole was obtained by the multi-point measurement method. The effect of the size of the pinhole on the full width at half maximum of this intensity distribution curve was eliminated to improve the accuracy of the obtained divergence of the ultrasonic beam.
出处
《物理实验》
北大核心
2011年第6期31-32,共2页
Physics Experimentation
基金
国家自然科学基金(No.11075017)
北京市自然科学基金(No.1092013)
高等学校博士学科点专项科研基金(No.200800271021)
证据科学教育部重点实验室(中国政法大学)开放基金资助课题(No.2010KFKT01)
北京市优秀人才培养(No.2010C009012000005)
关键词
超声波
扩散角
小孔反射
ultrasonic beam
scattering angle
pinhole reflection
