公开(公告)号：EP1158284A3

公开(公告)日：2009-05-27

申请号：EP01304439.1

申请日：2001-05-21

申请人： GENERAL ELECTRIC COMPANY

发明人： Ostendorf, Arthur Devol ,  Hopster, Joseph Henry

IPC分类号： G01H11/06

CPC分类号： G01H11/06

摘要： A capacitance probe (10) measures and tracks frequency and amplitude changes of a component during a high cycle fatigue portion of a life test. The probe includes an internal oscillator (14), an adjustable receiver circuit (16), a product detector (18), and a pair of gain amplifiers (40, 42). The oscillator generates a single controlled frequency output. The receiver circuit receives the frequency and creates a DC voltage shift that nulls the capacitance bridge. The product detector detects an amplitude modulated product of the oscillator and rejects (92) undesirable frequencies. gain amplifiers detect (100) a DC voltage shift and permit the capacitance effect to be easily nulled.

公开(公告)号：EP1158284A2

公开(公告)日：2001-11-28

申请号：EP01304439.1

申请日：2001-05-21

申请人： GENERAL ELECTRIC COMPANY

发明人： Ostendorf, Arthur Devol ,  Hopster, Joseph Henry

IPC分类号： G01H11/06

CPC分类号： G01H11/06

摘要： A capacitance probe (10) measures and tracks frequency and amplitude changes of a component during a high cycle fatigue portion of a life test. The probe includes an internal oscillator (14), an adjustable receiver circuit (16), a product detector (18), and a pair of gain amplifiers (40, 42). The oscillator generates a single controlled frequency output. The receiver circuit receives the frequency and creates a DC voltage shift that nulls the capacitance bridge. The product detector detects an amplitude modulated product of the oscillator and rejects (92) undesirable frequencies. gain amplifiers detect (100) a DC voltage shift and permit the capacitance effect to be easily nulled.

摘要翻译： 电容探针（10）在寿命试验的高周期疲劳部分测量和跟踪部件的频率和振幅变化。 探头包括内部振荡器（14），可调节接收器电路（16），产品检测器（18）和一对增益放大器（40,42）。 振荡器产生单个受控频率输出。 接收器电路接收频率并产生使电容桥无效的直流电压偏移。 产品检测器检测振荡器的幅度调制产物并拒绝（92）不期望的频率。 增益放大器检测（100）直流电压偏移，并允许电容效应容易为零。