Electricity: measuring and testing – Magnetic – Displacement
Patent
1995-06-06
1997-04-08
Snow, Walter E.
Electricity: measuring and testing
Magnetic
Displacement
32420716, G01B 714, G01R 3300
Patent
active
056191332
ABSTRACT:
A control circuit electrically coupled to the conductive coil of the elongated probe includes an energization circuit for coupling an alternating current signal to the coil. A monitoring circuit monitors a signal from the coil as the alternating current signal is applied to the coil that changes with a degree of overlap between the coupling member and the elongated probe and for providing an output signal related to the relative positions of two moveable members. A feedback control circuit adjusts the alternating current signal coupled to the coil to a control level based on the monitored signal from the monitoring circuit. Use of the feedback control enhances a dynamic range of the output signal from the monitoring circuit.
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Cooper Stephen R. W.
Shank David
Nartron Corporation
Snow Walter E.
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