电阻应变片法是测量水泵轴功率的主要方法之一。但目前生产的集流环装置均有接触电阻大、磨损尘粒易堆积、温升不易散发和滑环与碳刷接触压力不好调节等缺点。为提高测量精度,我们设计了一种简易集流环(图1),可以避免以上缺点。 Resistance strain gauge method is one of the main methods of measuring pump shaft power. But the current production of the current collector ring devices have contact resistance, easy to wear debris accumulation, temperature is not easy to issue and slip ring and carbon brush contact pressure is not good regulation and other shortcomings. To improve the measurement accuracy, we designed a simple slip ring (Figure 1) to avoid the above drawbacks.