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Method for correcting relation of voltage and airflow speed of mass flow sensor

A technology of mass flow rate and air velocity, which is applied in the field of anesthesia machines, can solve problems such as difficulty in ensuring accuracy and heavy workload, and achieve the effects of improving accuracy, improving efficiency, and good consistency

Inactive Publication Date: 2009-12-30
BEIJING AEONMED
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Problems solved by technology

[0002] When monitoring the gas flow of mass flow sensors in anesthesia machines, it is first necessary to calibrate the inhaled and exhaled mass flow sensors; at present, two methods are usually used for the calibration of mass flow sensors in anesthesia machines: one is to consider a mass flow The characteristic curve of the sensor is consistent in all anesthesia machines, and it is corrected according to the method of the characteristic curve. Using this monitoring method is relatively simple, but the accuracy is difficult to guarantee; the second is to perform multi-point calibration on the sensor, which can ensure Accuracy, but the workload of calibration is large

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  • Method for correcting relation of voltage and airflow speed of mass flow sensor

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[0017] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0018] figure 1 is a flowchart of the method according to the invention.

[0019] Such as figure 1 As shown, the method includes the following steps:

[0020] S102, placing the first mass flow sensor and the second mass flow sensor at the inhalation port and the exhalation port of the anesthesia machine, respectively;

[0021] S104, setting the anesthesia machine so that the gas can only enter from the exhalation port and can only be discharged from the inhalation port; and

[0022] S106, providing gases with different flow rates to the exhalation port, and simultaneously correcting the first mass flow sensor and the second mass flow sensor according to the measu...

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Abstract

The invention provides a method for correcting a relation of voltage and airflow speed of a mass flow sensor. The method comprises the following steps: step one, placing a first mass flow sensor and a second mass flow sensor at an air suction port and an exhalation port of an anesthesia machine respectively; step two, setting the anesthesia machine so that the air can enter only from the exhalation port and can be exhausted only from the air suction port; and step three, providing gas of different flow speeds to the exhalation port, and synchronously correcting respective relation of the voltage and the airflow speed of the first mass flow sensor and the second mass flow sensor according to the voltage value corresponding to the measured airflow flowing through the first mass flow sensor and the second mass flow sensor respectively. Therefore, compared with separate correction, by adopting the method of the invention, the correction can keep better consistency, and the correction precision can be improved; and simultaneously, the correction method is simplified, unnecessary workload is reduced, and the correction efficiency is improved.

Description

technical field [0001] The present invention relates to anesthesia machines, and more particularly, to a method for calibrating the relationship between the voltage of a mass flow sensor and the airflow velocity. Background technique [0002] When monitoring the gas flow of mass flow sensors in anesthesia machines, it is first necessary to calibrate the inhaled and exhaled mass flow sensors; at present, two methods are usually used for the calibration of mass flow sensors in anesthesia machines: one is to consider a mass flow The characteristic curve of the sensor is consistent in all anesthesia machines, and it is corrected according to the method of the characteristic curve. Using this monitoring method is relatively simple, but the accuracy is difficult to guarantee; the second is to perform multi-point calibration on the sensor, which can ensure Accuracy, but the workload of calibration is large. Contents of the invention [0003] The problem to be solved by the prese...

Claims

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Application Information

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IPC IPC(8): G01F25/00A61M16/01
Inventor 丛玉孟
Owner BEIJING AEONMED
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