参差调谐宽带阵列超声换能器研究

On wideband stagger-tuned array

提出用波束等价和采样合成定理对参差宽带阵列进行阵元布阵和波束优化设计的方法．给出根据这一方法进行模拟实验的结果．结果表明，通过等价模拟可得到合理的布阵方案和最优波束分布．在±２０°范围内，模拟精度在１％以内；在主瓣范围±５°以内，实验结果与模拟结果吻合较好．

A new method for element arranging and beam optimizing of the wideband stagger-tunde array (WSTA),based on the beam equivalence principle and the sampling composing law, is presented.A simulation study and the experiments by using this method are described. The results show that, with equivalent simulation,a reasonable arrangement and an expected optimizing beam distribution can be obtained.In the range of ±20°,the precision of simulation reaches l%. And within the main--lobe (l 5), the experimentalresults coincide well with the simulation.