Method and apparatus for monitoring actuators

Details Method and apparatus for monitoring actuators Method and apparatus for monitoring actuators

1997-10-21

2000-09-19

Williams, Hezron

Measuring and testing

Blower, pump, and hydraulic equipment

73 9, G01M 1900, G01N 356

Patent

active

061195154

ABSTRACT:
A method and apparatus for operational monitoring of an actuator, which has a drive force unit that requires a characteristic time for build-up of the force, the apparatus including at least one position signal generator detecting a rest position of the actuator, a drive switch unit for actuating the drive force unit, and signal connections to an analyzing arrangement having a memory and a comparison unit so that, during operation, the time difference between the actuation of the drive switch unit and the possible response of the position signal generator allocated to the preceding rest limit position of the actuator is monitored, a comparison of the measured quantity to characteristic data deposited in the memory is implemented and a conclusion about the condition of the actuator is obtained from this analyzation.

REFERENCES:
patent: 4274438 (1981-06-01), LaCoste
patent: 4523286 (1985-06-01), Koga et al.
patent: 4976144 (1990-12-01), Fitzgerald
patent: 4993259 (1991-02-01), LaFountain
patent: 5329956 (1994-07-01), Marriott et al.
patent: 5492009 (1996-02-01), Kempf et al.
patent: 5549137 (1996-08-01), Lenz et al.

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