Split coil arrangement for non-disruptive measurement of axial magnetic flux as part of system to infer machine health
AssigneeAnalog Devices International Unlimited Company
InventorsJonathan Ephraim David Hurwitz, Christopher Thomas Brown
Life of this patent
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Abstract
Axial magnetic flux sensors are described. The axial magnetic flux sensors comprise multiple substrates with conductive traces on them in some embodiments, and in other embodiments a single substrate or no substrate. When multiple substrates are provided, the substrates couple together such that the conductive traces connect to form a coil. The coil may be a continuous, multi-loop coil. When the substrates are coupled together, they may define an opening to accommodate a shaft or other piece of equipment.
Claims21
An axial magnetic flux sensor device comprising:
- a first substrate;
- a second substrate couplable with the first substrate to form a substantially planar closed loop;
- a first plurality of partial loop conductive traces on the first substrate;
- a second plurality of partial loop conductive traces on the second substrate;
- and
- a first pin and socket connector and a second pin and socket connector configured to couple the first and second pluralities of partial loop conductive traces in a single, continuous, substantially planar multi-loop coil.
A flux detection system, comprising:
- a motor comprising a casing and a shaft extending out of the casing;
- an axial flux sensor positioned around the shaft outside the casing, and comprising:
- first and second coupled supports forming an opening through which the shaft passes;
- a first plurality of partial loop conductive traces on the first support;
- a second plurality of partial loop conductive traces on the second support;
- a first trace connector coupling the first plurality of partial loop conductive traces with the second plurality of partial loop conductive traces;
- a second trace connector coupling the first plurality of partial loop conductive traces with the second plurality of partial loop conductive traces;
- and
- readout circuitry coupled to at least one trace of the first plurality of partial loop conductive traces and configured to amplify a signal from the at least one trace.
A sensor for sensing axial magnetic flux, the sensor comprising:
- two couplable substrates, couplable to form a substantially planar closed loop;
- partial loop conductive traces on one substrate of the two substrates;
- partial loop conductive traces on another substrate of the two substrates;
- and
- two trace connectors configured to couple the partial loop conductive traces on the two substrates in a single, continuous, substantially planar multi-loop coil.
An axial magnetic flux sensor device comprising:
- a rigid substrate;
- a first plurality of partial loop conductive traces on the rigid substrate;
- a flex ribbon of conductive traces coupled to the rigid substrate at one end and couplable to the first substrate at a second end of the flex ribbon;
- a first pin and socket connector configured to couple the second end of the flex ribbon to the rigid substrate to form a single, continuous, substantially planar multi-loop coil.
Dependencies are inferred from the claim text.