Inductive sensor for shock absorber
AssigneeKSR IP Holdings, LLC
InventorsRyan W. Elliott, Lingmin Shao, Shaun Fuller, Benjamin Scott Hill
Life of this patent
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Abstract
An inductor sensor assembly for determining to position of object includes a layer of ferrite overlaying exciting and receiving coils formed on a substrate. A magnet attached to the target produces a virtual coupler in an area of ferrite overlaying the coils. An application for a shock absorber includes a sensor module mounted in a recess in a dust cover and a magnet mounted to a cylinder tube of the shock absorber.
Claims14
An inductive sensor assembly for determining a position of a target on an object, the inductive sensor assembly comprising:
- a substrate having at least one transmitting coil and at least one receiving coil mounted to the substrate;
- a resonator connected to the at least one transmitting coil;
- a processing module connected to the at least one receiving coil, the processing module measuring eddy currents produced in the receiving coil;
- a layer of ferrite having magnetic permeability greater than 10 covering the at least one transmitting coil and the at least one receiving coil;
- a magnet mounted to a movable object spaced apart from the layer of ferrite, the magnet producing a magnetic field acting on an area of the ferrite layer to inductively couple the at least one transmitting coil with the at least one receiving coil in a region adjacent the area.
A sensor assembly for sensing a position of a shock absorber, the sensor assembly comprising:
- a housing;
- a sensor module mounted to the housing, the module having at least one transmitting coil and at least one receiving coil, the module further having a layer of ferrite covering the at least one transmitting coil and at least one receiving coil;
- a magnet mounted to the shock absorber, the magnet spaced apart from the ferrite layer, the magnet having a magnetic field action on the ferrite layer to inductively couple the at least one transmitting coil to the at least one receiving coil to produce a signal indicative of the position of the magnet and object relative to the housing.
Dependencies are inferred from the claim text.