等效相控接收阵及其在声波测井波形处理中的应用

The Equivalent Phased Receiver Array and Its Application in Processing of Acoustic Logging Waveforms

通过调节施加于相控线阵发射探头相邻阵元的激励信号的延迟时间 ,改变相控线阵辐射声波能量的方向 ,使得各个阵元辐射的声波信号在介质的传播过程中某个给定方向上的能量最大。根据声场的互易原理 ,当对一个接收阵列的不同阵元接收到的信号进行延时相加时 ,调节阵列接收器中每个阵元所接收的声波信号的延迟时间使它们同相位叠加 ,也可以有利于接收某一个特定方向的声波 ,从而使得接收到的声波能量最大。利用该思想处理了声波全波信号 ,取得了预期效果。

For linear phased array emitter, if appropriate delay times of sources are exerted on elements of phased array, the direction of acoustic beam radiated from the array can be steered so that the propagating energy radiated from each element is maximum in certain direction. According to reciprocity principle, when adjusting the delay time of neighboring element of a receiver array and stacking the shifting signals of different elements, the received stacking energy can also be maximal in certain direction when waveforms satisfy in-phase stacking. This paper adopts the above idea to process the acoustic full waveforms with the anticipated results.