在液压马达出厂试验中，容积效率的测定可用额定工况卜在恒定的时间内，人工读取流量计上的量值或外泄漏量值，然后进行计算；另一种是采用计算机采样即液压CAD系统。前者的测量精度完全由人为控制，并不能满足标准规定的要求；后者虽测试精度较高，但测试成本高。本文设计了一 In the hydraulic motor factory test, the volumetric efficiency can be used to determine the rated load Bu in a constant period of time, manually read the flow meter on the amount of value or external leakage, and then calculate; the other is the use of computer sampling that hydraulic CAD system. The former measurement accuracy completely by the human-controlled, and can not meet the requirements of the standard requirements; the latter although the test accuracy is high, but the test cost is high. This article designed one