FLOW CONTROL METHOD FOR PROPORTIONAL VALVE OF BREATHING MACHINE

Title:

FLOW CONTROL METHOD FOR PROPORTIONAL VALVE OF BREATHING MACHINE

Document Type and Number:

WIPO Patent Application WO2017008548

Kind Code:

A1

Abstract:

A flow control method for a proportional valve of a breathing machine. The method comprises: step 1) acquiring a minimum flow value a and a maximum flow value b of a proportional valve and corresponding drive voltage values thereof, uniformly dividing an interval [a, b] into N flow segment intervals, acquiring a voltage at the left endpoint of each of the N intervals as a feed-forward voltage by means of linear fitting, taking the feed-forward voltage as an initial voltage to calculate, through a closed-loop control algorithm, a drive voltage corresponding to a flow at the left endpoint of each interval, and then performing linear fitting on flows and drive voltages of the N intervals so as to establish a linear relationship between the flows and the drive voltages of the proportional valve of a breathing machine; step 2) according to a proportional valve flow value required to be output, firstly finding out the flow segment interval where the value is located, and then calculating a drive voltage value corresponding to the flow value according to the fitted linear relationship; and step 3) adjusting the voltage of the proportional valve to the drive voltage value obtained in step 2), and then the flow output by the proportional valve satisfying a requirement.

Inventors:

KONG DEYU (CN)

Application Number:

PCT/CN2016/079342

Publication Date:

January 19, 2017

Filing Date:

April 15, 2016

Export Citation:

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Assignee:

BEIJING AEONMED CO LTD (CN)

International Classes:

G05D16/20

Domestic Patent References:

WO1993010844A1

1993-06-10

Foreign References:

CN203745923U	2014-07-30
US4823788A	1989-04-25
US5474062A	1995-12-12
CN104707228A	2015-06-17
CN101614575A	2009-12-30

Other References: