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计算机仿真表明一种用于深层局部高温加热的新型具有空间几何开关的超声相控阵发生器有重要的潜力。此阵列对三维热模型提供了精确控制,阵列元素在球形断面上形成一矩形点阵,因此,当阵列元素根据相位趋动时,阵列自然聚焦于其几何中心。与具有相同结构的平面阵列比较,球形断面阵列能产生更强的焦点光强增益,因而它对深部穿透和热定位是极有用的。而且,此阵列(与具有相同中心间距离和元素数目的平面阵列相比)相对光波瓣(与焦点比较)对于扫描焦点的合成是较低的。
Computer simulation shows that a new type of ultrasonic phased array generator with spatial geometry switch for deep local high temperature heating has great potential. The array provides precise control over the three-dimensional thermal model. The array elements form a rectangular lattice on the spherical cross-section so that the array naturally focuses at its geometric center as the array elements move in phase. Compared with a planar array of the same structure, the spherical cross-section array produces a stronger focal light gain and is therefore extremely useful for deep penetration and thermal positioning. Moreover, this array (as compared to a planar array with the same center-to-center distance and number of elements) relative to the light lobes (compared to the focus) is low for the synthesis of the scanning focus.