Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Patent
1995-05-09
1998-01-20
Karlsen, Ernest F.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
324636, 364174, G01R 3332
Patent
active
057105146
ABSTRACT:
A piston position sensing system in which tabulated resonance width related information is stored in a form correlated with piston travel so that measured resonance width information can be compared with the stored information in determining piston position and compensation for the velocity of the piston is provided by correction for a time difference in serial sensing between the initial and the following extremes of a resonance signal as the piston moves. the compensation is developed from velocity information identified through previous and current processing cycles which assures reliability in detection of the subsequently sensed portion of the resonance signal envelope and enhanced sensitivity and accuracy through automatic application incrementally in a dynamic gain adjustment of the sensing system.
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Crayton John W.
Lee Eric F.
Morgan Denny
Schumacher Dennis L.
Caterpillar Inc.
Karlsen Ernest F.
Kibby Steven G.
Riddles Alvin J.
Solis Jose M.
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