Position sensor
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United States of America Patent
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-
Jul 20, 1982
Grant Date -
N/A
app pub date -
Aug 29, 1980
filing date -
Aug 29, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A position sensor comprising a ferromagnetic member operatively connected to an operation means and movable in response to displacement of the operation means, a magnetically soft member surrounded by an electrical coil secured adjacent to a range of movement of the ferromagnetic member, and a displacement pulse phase conversion unit including a permanent magnet. Voltage pulses are applied to one end of the electrical coil, the other end of which is connected in series with a resistor. A voltage drop across the resistor is detected and a time lag of the resistor voltage, which time lag corresponds to displacement of the operation means, is provided in the form of an analog voltage or a digital code.
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