In order to improve the accuracy of batch interface detection in product oil pipe-lines combined with physical acoustics theory(sounds speed in different kinds of oil were not the same), the existing ultrasonic flowmeters were used in station to upload the collected ve-locity values of fluid in the pipeline, then the remote transmission of data was completed, and the interface was detected finally. The values of density, sound velocity and OID curves of the batch interface were drawn in the same time axis when it got into Zhengzhou oil station. The axis showed that the density and velocity values changed basically the same, while the OID trend was contrary. The curve of the sonic value changing with the density value showed that the relationship of the above two was linear which indicates that the sonic value is equivalent to the density value in the batch interface detection.%为了提高成品油管道中批次界面检测的准确性，结合物理声学理论（声音在不同种类油品中其传播速度不同），并将站场现有的超声波流量计采集的管道内流体声速值进行上传，完成该数据的远传，最终达到界面检测目的。通过数据处理软件，将郑州站批次界面进站时密度值、声速值及OID数值变化曲线绘制在同一时间轴下，可以看到三者基本同步变化，密度值与声速值变化趋势基本相同，而OID趋势变化相反。研究声速值随密度变化曲线可知，二者变化呈线性关系，这表明在检测批次界面时，使用声速值与密度值是等效的。
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