METHOD AND SYSTEM FOR SENSING POSITION OF MOVING OBJECT AND CLUTCH PISTON POSITION SENSING SYSTEM WTIH SLEEP FUNCTION
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United States of America Patent
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Feb 3, 2017
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Feb 6, 2016
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The invention provides a method and a system for sensing position of a moving object. A relatively long stroke of a moving object is divided into multiple areas. A sensing element is disposed in each area to sense a magnetic field signal when a magnet apparatus moves along with a moving object and passes through each area, and to generate a sensed signal of each area. A microcontrol unit receives sensed signals of segments and performs temperature compensation and correction on the sensed signals, then combines the sensed signal according to time and a stroke sequence to form a continuous moving-object movement signal that reflects the entire stroke. The invention also provides a clutch piston position sensing system with a sleep function, having a magnet apparatus disposed on the piston and moving along with the piston in the stroke; a sleep control circuit having a sleep sensing element and configured to sense a position of the magnet apparatus and generate a sleep control signal to control the clutch piston position sensing system to be in a started or sleep mode; and a microcontrol unit for receiving the sleep control signal and control the clutch piston position sensing system to be in a sleep or started state.
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