Electronic force sensing with sensor normalization
June 1, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesTouch terminal with reliable pad selection Self-correcting electronically scanned pressure sensor Transducer calibration system Measurement calibration Marine seismic signal processor with D.C. offset compensation method Method and apparatus for cursor motion having variable response Sensor monitoring arrangement with error correction Pressure transducer compensation system Multiple variable compensation for transducers Method for compensating errors in a pressure transducer InventorsAssigneeApplicationNo. 069717 filed on 06/01/1993US Classes:324/601, Calibration324/130, Self-calibration702/109For transfer function determinationExaminersPrimary: Karlsen, Ernest F.Attorney, Agent or FirmForeign Patent References
International ClassesG04F 010/00G01L 007/04 AbstractMethods and apparatus are disclosed for normalizing electronic sensor data to correct for variations in individual sensor transfer characteristics which are not known in advance. A general characteristic transfer function for a sensor type of interest is determined empirically. A baseline response reading is acquired from an individual sensor, and that baseline response applied to the general transfer function to determine a specific transfer function for the individual sensor. The specific transfer function is used to calculate normalized data. One application of the invention is in computer cursor control pointing devices such as a joystick. Because the invention compensates for wide variations in sensor characteristics, inexpensive sensors such as force-sensitive resistors may be used in a joystick without sacrificing pointing accuracy and ergonomic efficiency.Other References
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