Method and arrangement for diagnosis of a final control element
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United States of America Patent
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Feb 28, 2012
Grant Date -
May 29, 2008
app pub date -
Nov 19, 2007
filing date -
Nov 25, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
The disclosure relates to a method and an arrangement for diagnosis of a final control element, which is actuated by a pneumatically operated actuating mechanism under the control of a control device, and which emits acoustic signals during conventional use. It is proposed to detect acoustic signals fed back into the pneumatic system of the actuating mechanism, and to derive from them the status data of the final control element. For this purpose, an acoustic sensor is arranged in the pneumatic-fluid supply line of the actuating mechanism, with the acoustic sensor being electrically connected to an analysis device. A pressure sensor is used as the acoustic sensor.
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