Positioner and Valve Control System
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United States of America Patent
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Apr 20, 2017
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Apr 21, 2016
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Abstract
A positioner has an electro-pneumatic converter that supplies a pneumatic signal obtained by converting an electrical signal for designating a valve opening of a control valve to operate a valve shaft, a valve-shaft position detection unit that detects a position of the valve shaft, and a control signal generating unit that generates the electrical signal based on a valve opening target and the position of the valve shaft. The positioner includes a first communication unit performing communication with the host device, a second communication unit performing communication with at least one sensor for monitoring the peripheral environment of the control valve by wireless communication, and a communication controller that controls the first communication unit to transmit information on the peripheral environment acquired from the sensor by the second communication unit through the first communication unit to the host device.
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