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。

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The test results show that this test system has good stability and reliability, which can test some important characteristic parameters accurately.

试验结果表明，本检测系统具有良好的稳定性和可靠性，能够准确地检测电控喷油器的重要特性参数。

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Based on analysis of the principle of overflow valve dynamic characteristic test, virtual instrument system for the overflow valve measurement was designed.

在分析溢流阀动态特性测试原理的基础上，设计了溢流阀动态特性测试虚拟仪器系统。

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