Flow calibrating method and flow calibrating system for flow sensors of anaesthesia machines

Abstract

A flow calibration method and system for an anesthesia machine flow sensor, the method comprising the following steps: gradually increasing the flow rates of a plurality of anesthesia machines, and when preset conditions are satisfied, acquiring the voltage values of the flow sensors (S101); calculating the average voltage value of the plurality of sampling points of each anesthesia machine, and obtaining, by means of the average voltage value of the plurality of sampling points of each anesthesia machine, the default voltage curve of the flow sensors (S102); dividing the default voltage curve into 3 sections, and selecting in the 3 sections 4 calibration points and acquiring the voltage value of each calibration point (S103); calculating the voltage difference, for each calibration point, between the acquired voltage and the default voltage curve, and according to the voltage difference, accurately calibrating the flow of the anesthesia machine (S104). According to the method, by means of determining the calibration points within a segmented range and according to the voltage differences between the default voltage curve and the calibration points, the flows of other acquisition points can be determined, reducing the level of complexity of the calibration process and also ensuring calibration accuracy.

Description

technical field [0001] The invention relates to the technical field of anesthesia machines, in particular to a flow calibration method and system for a flow sensor of an anesthesia machine. Background technique [0002] The flow sensor is a key component for monitoring the inspiratory and expiratory flow on the anesthesia machine. During the ventilation process, the anesthesia machine can measure the real-time inspiratory and expiratory flow rate, and calculate the expiratory and inspiratory flow rate based on the inspiratory and expiratory flow rate. Tidal volume, so the accuracy of the flow sensor is of great importance. [0003] In order to ensure the measurement accuracy of the flow sensor, it needs to be calibrated before use, that is, the corresponding data relationship table is established by measuring the sampling voltage of the flow sensor and the corresponding flow rate value, and the actual use is calculated through the sampling voltage by looking up the table. A...

AI Technical Summary

Problems solved by technology

Since a large number of collection points need to be recorded for each calibration, and the calibration data reaches dozens, there are defects such as long time consumption, inconvenient operation, and low efficiency.

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