摘要
研究了非整数维超声相控阵聚焦特性以及在石油井下的扫描探测方法,首先对1.25D,1.5D和1.75D相控阵聚焦声场进行了分析,对如何提高仰角方向分辨率及减少动态阵元数等问题进行了深入的讨论;然后,研究了环形和分割环形相控阵列聚焦声场及声束偏转等特性,并和2D面阵进行了对比分析;论文还对1.25D、1.5D、1.75D、环形和分割环形相控阵列在石油测井中的应用方法进行了研究和讨论,为超声相控阵技术在井下应用提供了理论基础。
The non-integer dimension ultrasonic phased array and its scanning and testing methods in acoustic logging are studied. At first, the focusing acoustic field excited by a 1.25D, 1.5D, and 1.75D phased arrays is analyzed, and the imaging resolution in the elevation direction and the reduction of dynamic elements are investigated. Then, the focusing and deflexion characteristics of the acoustical fields excited by the annular and segmented annular phased arrays are studied and compared with 2D surface array. The application method of 1.25D, 1.5D, 1.75D, annular and segmented annular phased arrays in acoustic logging is analyzed and discussed. It provides a theoretical foundation for application of the ultrasonic phased array in acoustic logging.
出处
《声学学报》
EI
CSCD
北大核心
2008年第6期555-561,共7页
Acta Acustica
基金
国家自然科学基金资助课题(10774158)
关键词
超声相控阵
探测方法
非整数
井下应用
聚焦特性
聚焦声场
相控阵列
石油测井
Acoustic fields
Acoustics
Harvesting
Logging (forestry)
Two dimensional
Ultrasonic imaging
Ultrasonic testing
Ultrasonic transducers
Ultrasonics
