Inductive flow sensor for determining the position of flowing elements and method of determining the position of flow
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United States of America Patent
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Dec 28, 2004
Grant Date -
Feb 20, 2003
app pub date -
Jun 27, 2002
filing date -
Jun 27, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An inductive path sensor for determining the position of the influencing element (2) is described, with several coils (4) arranged in succession, with one capacitor (5), with an amplifier element (6), with at least one changeover switch (7) and with an evaluation unit (8), one coil (4) at a time and a capacitor (5) forming an oscillating circuit, and one oscillating circuit and the amplifier element (6) forming an oscillator (9), the individual coils (4) being chosen in succession by the changeover switch or switches (7) and the evaluation unit (8) measuring the change of impedance of the coil (4) chosen by the changeover switch (7) or of the oscillating circuit chosen by the changeover switch (7) depending on the position of the influencing element (2) relative to the respective coil (4).
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