非整数维超声相控阵探测方法研究  

Non-integer dimension ultrasonic phased array testing

作　　者：章成广[1,2] 张碧星[1,3] 邓方青[3] 师芳芳[3] 

机构地区：[1]长江大学地球物理与石油资源学院,湖北荆州434023 [2]武汉大学空间环境与大地测量教育部重点实验室,武汉430079 [3]中国科学院声学研究所声场声信息国家重点室,北京100190

出　　处：《声学学报》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)

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.

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 

分 类 号：TB553[理学—物理]