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US 4,733,151 AGranted
Control system for vibration testing apparatus
AssigneeLing Electronics, Inc.
InventorGary Butts
Life of this patent
Estimating the term…
Abstract
A load support servomechanism circuit controls the armature of a shaker apparatus. The circuit includes a position sensor, peak detectors connected to outputs of the position sensor, an A/D converter connected to outputs of the peak detectors through a switching bank, a power supply and a microprocessor which provides clock, read, write and ready signals and which automatically controls the position of the armature through solenoids operating on an exhaust valve and a pressure valve. Manual operation of the shaker armature is also provided.
Claims7
A load support servomechanism for a shaker apparatus circuit comprising:
- a position sensor which provides a current proportional to the position of an armature of said shaker apparatus;
- a pair of peak detectors connected to an output of said position sensor which output has said proportional current flowing therethrough;
- a bank of switches with individual switches of said bank of switches connected to respective buffered outputs of said peak detectors;
- an A/D converter connected to a buffered output of said bank of switches;
- a microprocessor which receives inputs from said A/D converter over a bus and which conveys clock, read and write signals to said A/D converter;
- a power supply which comprises means for generating AC and DC voltage and which has an AC voltage connection to said switching bus and DC connections to said A/D converter, said microprocessor, and to a buffer circuit which produces said buffered output of said bank of switches;
- and
- a pair of amplifying and switching means converted to respective outputs of said microprocessor and to a DC voltage source.
5 more elements
Dependencies are inferred from the claim text.