大阵元超声相控阵多组扫查系统研究

大阵元超声相控阵多组扫查系统，可提供更好的扫查灵活性、图像对比度，增加聚焦法则多样性并实现分布式扫查。为在资源有限的条件下提高资源利用率，保证实时性，实现分布式扫查，需要研究系统资源复用以及数据处理协同调度，减少仪器硬件开销和避免信号处理混叠冲突，提高仪器性能。因此重点研究大阵元超声相控阵多组扫查系统中多组延时聚焦、多组同构流水信号处理、异构分层多DAG(有向无环图)信号处理等方面调度理论方法与关键技术，并应用于大阵元超声相控阵多组扫查仪器研制。

Research on Large Array Multi-group Scanning Ultrasonic Phased Array System

The large array multi-group scanning ultrasonic phased array system can provide better scanning flexibility, imagecontrast, increase the diversity of focal law and realize distributed scanning. In order to improve resource utilization, ensure realtimeperformance and realize distributed scanning under limited resources, it is necessary to study system resource reuse and dataprocessing cooperative scheduling, reduce hardware consumption and avoid signal processing overlapping conflicts, and improve instrumentperformance. Therefore, the scheduling theory, methods and key technologies of multi-group delay and focus, multi-grouphomogeneous flowshop signal processing, heterogeneous hierarchical multi-DAG (directed acyclic graph) signal processing in multigroupscanning system ultrasonic phased array with large array are mainly studied. The method also applied to the development ofmulti-group scanning instrument of large-element ultrasonic phased array.