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Patent Searching and Data


Title:
ELECTROPNEUMATIC POSITIONER
Document Type and Number:
Japanese Patent JP3511458
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To reduce work load and eliminate mistake in setting up in a work site and periodic maintenance.
SOLUTION: An automatic setting command is given to an electropneumatic positoner. Thereby, in the electropneumatic positoner, in the case of converting an input current I(4 to 20 mA) into a pneumatic pressure, a valve opening position of a regulating valve is obtained as XIMIN and XIMAX (step 104, 107) when a coil drive current IM is set to 0 mA and maximum value, a valve opening position X10 of the regulating valve in the case of the coil drive current IM in 0 mA is obtained from a relative position relation of this XIMIN, XIMAX and a valve cock form of the regulating valve, and from the obtained valve opening position X10, a maximum/minimum value 20 mA, 4 mA of the input current I is set to be a signal controlling a valve opening of the regulating valve in any direction of full opening/closing (step 109).


Inventors:
Nagasaka, Fumio
Application Number:
JP33750397A
Publication Date:
March 29, 2004
Filing Date:
December 08, 1997
Export Citation:
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Assignee:
YAMATAKE CORP
International Classes:
F16K31/04; F15B9/07; F16K37/00; G05B19/19; G05B19/23; (IPC1-7): F16K37/00; F15B9/07
Attorney, Agent or Firm:
山川 政樹 (外4名)