相控阵超声波束时空特性模糊控制方法的研究

Research on the Fuzzy Control Method Used for Phased ArrayUltrasonic Beam Time -Space Characteristics

相控阵超声波束的时空特性直接影响Ｂ超图象的质量。作者提出了一种基于模糊控制理论的波束时空控制方法，使得电子聚焦的焦距和孔径大小能够随回波信号动态地改变，有效地改善了相控阵Ｂ超图象的质量，这一方法开创了模糊控制理论在医学超声领域的应用。

Phased array ultrasonic beam time -space characteristics affect the image quality directly.Anew beam time-space control method, basd on fuzzy control theory, is proposed in thispaper. As. a result, the electric focal length and aperture can vary dynamically with echosignal, and the quality of phased array B-mode ultrasonic image is improved effectively. Thismethod initiates the application of fuzy control theory in medical ultrasonic field.