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US 5,675,094 AGranted
Load variation detector
AssigneeSensortech L.P.
InventorsRobert D. Klauber, Erik B. Vigmostad
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AssigneeSensortech L.P.
InventorsRobert D. Klauber, Erik B. Vigmostad
Estimating the term…
A method and apparatus to detect variations in load by comparing signals related to, but not necessarily accurately correlated with, stress/strain states of a load transmitting member. In one embodiment, a first signal is obtained relating to the time rate of change of stress in the member produced by a first loading event or series of events. A second signal is obtained which relates to the time rate of change of stress in the member produced by a second loading event or series of events. The first and second signals are compared to detect significant variations in loading. Each of the two signals may be a composite of other signals. A magnetostrictive sensor may preferably be used to obtain the signals relating to the stress in the load transmitting member. The load may be applied force, torque, stress, strain, or deflection. In another embodiment, the time rate of change of a single segment of an analog signal related to, but not directly correlated with, stress is used to determine rapid changes in load. In yet another embodiment, a statistical value derived from a plurality of signals is used to determine variation in load. Applications comprise internal combustion engine and driveline torque variation diagnostics, brake pedals, and suspension systems.
A method for detecting variation in load in a load transmitting member which experiences a plurality of load producing events at different times, at least one of which load producing events may be a zero load, said method comprising the steps of:
A method for detecting variation in load in a load transmitting member which experiences a plurality of load producing events at different times, at least one of which load producing events may be a zero load, said method comprising the steps of:
A method for detecting variation in load in a load transmitting member which experiences a series of load producing events at different times, said method comprising the steps of:
A method for detecting variation in load in a load transmitting member which experiences a plurality of load producing events, at least one of which may be a zero load, said method comprising the steps of:
A method for detecting variation in load in a load transmitting member which experiences a plurality of load producing events, at least one of which may be a zero load, said method comprising the steps of:
Dependencies are inferred from the claim text.