提高电涡流传感器可靠性试验和分析方法研究

Test and Analysis of Reliability Improvement for Eddy Current Sensor

电涡流传感器在磁悬浮系统中被用于轨道与电磁铁间隙的检测,系统控制间隙稳定性和运行的安全性在很大程度上依赖于传感器的可靠性和测试输出的稳定性。为评价和改进产品的可靠性,本文提出并采用了基于模拟现场试验和数据分析以提高该电涡流传感器执行性能和可靠性的过程和方法。文中首先阐述了该过程方法的原理,并对可能影响传感器系统性能的各种因素进行了总结分析。结合该定性分析结果,介绍了基于不确定性静态分析的数据分析方法。根据工作条件和环境条件设计并实施试验过程,并通过对试验数据的分析,得到系统性能的定量评价。通过定量结果与影响因素的对应关系分析,对系统存在的设计薄弱环节进行了准确定位,从而有效地指导了设计改进过程,提高了系统的可靠性。

Eddy current sensor is used for detecting the gap between the track and the electrical magnet. The stability of gap control and security of operation mostly rely on the reliability of the sensor and the stability of the detection output. In this article, a process based on simulating fieldwork test and test data analysis is presented to promote performance and reliability of the sensor. At first, the principle of this process is addressed. Then various factors that influence the performance of the sensor are qualitatively analyzed. Based on this qualitative analysis resuit, a data analysis method based on static uncertainty analysis is proposed. Test process is designed and executed according to the working condition and environment condition. Quantitative evaluation of the system performance is assessed through the analysis of the test data. Weakness segments are discovered from the relationship between quantitative result and its corresponding qualitative result. And the weakness spot of the design is positioned exactly, so that the design can be improved effectively. At last the reliability of this system is enhanced.