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Development of digital stroke sensing cylinder and its performance evaluation

Published online by Cambridge University Press:  09 March 2009

S.Y. Yang ,
M.C. Lee ,
M.H. Lee  and
S. Arimoto
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Extract

Automation of heavy construction machinery needs sensors that can detect each position under severe construction fields. Motivated by this need a hydraulic cylinder equipped with Hall sensors of Ga-As type has been developed. However, this sensor device has some problems associated with incorrect detection of positions owing to the existence of some magnetic slope and electric noises. To solve these problems, this paper proposes a digital stroke sensing cylinder enhanced by digital signal processing. An apparatus of two hydraulic systems coupled with each other is installed in an experimental setup to evaluate the performance of the developed digital stroke sensing cylinder. In order to control the position of a cylinder rod, a PWM method is used. Evaluation of the performance is carried out under artificial disturbances such as an impulse, addition of some magnetic slope, and additional noises.

Keywords

Digital stroke sensing cylinderHall sensorMagnetic slopeDigital signal processingPWM ControlS/N Ratio.
Type
Research Article
Information
Robotica , Volume 14 , Issue 6 , November 1996 , pp. 687 - 694
Copyright
Copyright © Cambridge University Press 1996

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