基于四维切片图的相控阵超声辐射声场研究

Study on Phased Array Ultrasonic Radiated Sound Field Based on The Four-Dimensional Slices

声束聚焦是超声相控阵区别于常规超声检测方式的主要特点之一。该文研究了单源矩形换能器与一维线阵的辐射声场。在四维切片图的基础上详细分析了频率、阵元数和阵元间距对声束聚焦时焦斑和焦深的影响,进而分析了对检测分辨力和声压值的影响,换能器参数的优化结果对于相控阵探头的优化设计具有一定的参考价值。

The focusing beam is one of main characters of ultrasonic phased array which differs from the conven- tional ultrasonic test method. The sound field of monophyletic rectangular transducer and one dimensional linear ar- ray were studied in this paper. The effects of frequency, element numbers and space of element space on the focal spot and depth of focus were analyzed based on the fouvdimensional slice figure. Furthermore, the influence on the resolution and sound pressure value were analyzed The optimized results of transducer parameters have certain refer ence value for optimal design of phased array probe.