【摘要】 实际使用中,声学多普勒流速剖面仪(ADCP)常常处于倾斜状态。为了ADCP能用于各种场合,设计时必须解决一个首要问题:如何判断四个波束上同一水层对应的回波。通过坐标变换推导了该判断公式,该公式利用ADCP的姿态角确定不同回波的到达时间。在此基础上通过矢量分解推导了流速的解算公式,该公式利用四个波束中测得的相应的速度值和ADCP的姿态角确定流速。根据该方法设计的ADCP既可用于竖直布放也可用于非竖直布放,具有更大的适用范围。更多还原

【Abstract】 A four-beam acoustic doppler current profiler(ADCP) is often used at an angle.In order to enable it to be applicable in that case,the problem of how to judge that the backscattered echoes along four beams are from the same depth water mass must be solved first in the engineering design of the ADCP.By means of the coordinate transformation the judging formula is deduced.The formula indicates that the varied time for those echoes to arrive is determined by the attitude of the ADCP.Furthermore,by means of the vector resolution the formula for calculating flow velocity is deduced.That formula indicates that flow velocity is determined by the attitude of the ADCP and the corresponding speed data from four beams.The ADCP designed with the given formulae is applicable in both erect and slantwise placement,so it has applicability in a greater extent.更多还原