The automatic four quadrant characteristic test system of centrifugal pump was introduced, and the implementation method of the hardware and software of the test system were given.
本文结合实际介绍了离心泵四象限运行特性曲线自动化试验系统的测试回路，并给出了测试系统的硬件方案和软件设计方法。
The experiment came into use single light path critical angle method, output signals were detected by four-quadrant receiver, micro-displacement drive element were piezoelectric ceramics.
实验采用单光路临界角法，用四象限探测器探测输出信号，物面微位移采用压电陶瓷作为驱动元件。
The system error introduced by the four-quadrant photocell and the error correction method are analyzed emphatically.
文中对测量误差进行了简要的论述，分析了四象限光电池引入的系统误差和修正方法。
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