Gas control system and program for gas control system
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United States of America Patent
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Nov 27, 2018
Grant Date -
Apr 13, 2017
app pub date -
Oct 12, 2016
filing date -
Oct 13, 2015
priority date (Note) -
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Abstract
A gas control system includes: a first valve that is provided in a carrier gas line or in a gas supply line; a flow rate control mechanism that is provided in a diluent gas line and includes a flow rate sensor and a second valve; a contactless type first concentration sensor; a first valve control part; a diluent gas setting flow rate calculation part adapted to, on the basis of a preset setting total flow rate of a post-dilution mixed gas and a post-dilution measured concentration, calculate a diluent gas setting flow rate that is a flow rate of a diluent gas to be flowed through the diluent gas line; and a second valve control part adapted to control the opening level of the second valve so as to decrease the deviation between the diluent gas setting flow rate and a measured flow rate measured by the flow rate sensor.
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