CN105371925A - An anaesthesia machine flow sensor calibration method - Google Patents
An anaesthesia machine flow sensor calibration method Download PDFInfo
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- CN105371925A CN105371925A CN201410390218.2A CN201410390218A CN105371925A CN 105371925 A CN105371925 A CN 105371925A CN 201410390218 A CN201410390218 A CN 201410390218A CN 105371925 A CN105371925 A CN 105371925A
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Abstract
The invention relates to the field of anaesthesia machines, and specifically provides an anaesthesia machine flow sensor calibration method. The method comprises the steps of dividing a work flow range of an anaesthesia machine into a plurality of sections according to flow; determining one flow value for each section as the calibration value of the section; delivering air flow corresponding to the calibration value of each section to a flow sensor successively and measuring the sensor voltage value corresponding to each calibration value; obtaining a flow-voltage curve according to the sensor voltage values corresponding to the calibration values; selecting the flow values of n points on the curve as comparison values and judging whether the ratio of the corresponding voltage values of the flow-voltage curve to the corresponding voltage values of a standard flow-voltage curve under the flow values of the n points is greater than or identical to a lower limit and less than or identical to an upper limit; if so, judging that the accuracy of the flow sensor is qualified, and otherwise, judging that the accuracy of the flow sensor is not qualified. The method can calibrate anaesthesia machine flow sensors without providing stable high-flow air flow, thereby improving the measurement accuracy.
Description
Technical field
The present invention relates to Anesthesia machine field, be specifically related to a kind of flow transducer of anesthesia apparatus calibration steps.
Background technology
Anesthesia, as a kind of medical procedure, is more and more familiar with by medical profession and uses.Namely inhalation anesthesia is the alveolar by the mechanical circuit of Anesthesia machine, arcotic (agent) being sent into patient, forms arcotic partial pressure, after permeating into blood, directly inhibiting effect occurs to central nervous system, thus produces the effect of general anesthesia.But Anesthesia machine is operating room security, stability, the exigent equipment of handiness.
The flow sensor of Anesthesia machine is the core devices of Anesthesia machine, and the core index tidal volume of Anesthesia machine is obtained by the integral and calculating of the gas flow by flow sensor, so the degree of accuracy of flow sensor determines the precision of tidal volume.
In the prior art, the calibration of flow sensor often adopts multiple spot calibration method or zero point correction method.Current multiple spot calibration method, from 0L/min flow, every the sensor voltage that a little interval traffic sampling is once corresponding, progressively strengthens, until 110L/min.So when adopting the calibration of multiple spot calibration method, require that flow keeps stable.
Although although multiple spot calibration method precision is high, because multiple spot calibration method needs stable air-flow, and to progressively increase.And user hospital is there, can not ensure to provide large discharge and stable air-flow, therefore its service condition is limited.
Current zero point correction method, only needs this point of calibration 0L/min.Be written with a voltage-flow curve in advance in a program, the value of each point in practical application is that the voltage-flow curve write in advance in program deducts value at zero point.That is to say that in a program, voltage-flow curve has moved up and down.
But being the mean value of multiple flow transducer of anesthesia apparatus curves of the same model tested in laboratory due to the voltage-flow curve in zero point correction method, is not the calibration to single flow transducer of anesthesia apparatus.So the shape of the flow sensor curve of same model Anesthesia machine is all identical, not that every platform Anesthesia machine adjusts separately, so the precision obtained is accurate not.
Due to the defect of above two kinds of calibration stepss, need badly and want a kind of new flow transducer of anesthesia apparatus calibration steps, to solve the accurate not problem of the service condition existed in prior art calibration accuracy that is limited or flow sensor.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of flow transducer of anesthesia apparatus calibration steps, adopt the method namely can avoid the air-flow providing stably large discharge, also every platform flow transducer of anesthesia apparatus is calibrated, improve measuring accuracy.
The embodiment of the present invention is by the following technical solutions:
A kind of flow transducer of anesthesia apparatus calibration steps, comprises step:
S10, according to uninterrupted the operating flow range of Anesthesia machine to be divided into that several are interval;
S20, determine a flow value in each interval, as the calibration value in this interval;
S30, pass into air-flow corresponding to the calibration value in each interval successively to flow sensor, and measure the sensor voltage value corresponding to each calibration value;
S40, sensor voltage corresponding to each calibration value measured in step S30 are worth outflow-voltage curve;
S50, the flow-voltage curve drawn in step S40 and normal flow-voltage curve to be compared, described curve is got the flow value of n point as fiducial value, judge whether the magnitude of voltage ratio the magnitude of voltage that the flow value down-off-voltage curve of described n point is corresponding is corresponding with normal flow-voltage curve is more than or equal to lower limit and is less than or equal to higher limit, if so, then judge that flow sensor degree of accuracy is qualified; Otherwise, then judge that flow sensor degree of accuracy is defective, described n>=1.
As preferably, in step s 40, the method obtaining outflow-voltage curve comprises the following steps:
In flow-voltage coordinate system, mark the coordinate points that the sensor voltage value measured in several calibration values step S30 corresponding is respectively corresponding, and be connected by each coordinate points straight line, curve obtained is flow-voltage curve.
As preferably, in step slo, the operating flow range of Anesthesia machine is 0L/min-110L/min, the gas flow flowing through flow sensor is divided into three sections, is respectively 0L/min-10L/min, 15L/min-40L/min, 45L/min-110L/min.
As preferably, in step S20, the calibration value span of 0L/min-10L/min section is 4L/min-6L/min; The calibration value span of 15L/min-40L/min section is 20L/min-30L/min; The calibration value span of 45L/min-110L/min section is 40L/min-60L/min.
As preferably, the calibration value value of 0L/min-10L/min section is 5L/min; The calibration value value of 15L/min-40L/min section is 25L/min; The calibration value value of 45L/min-110L/min section is 50L/min.
As preferably, described lower limit span is 0.8-0,95; Described higher limit span is 1.05-1.2.
As preferably, described lower limit is 0,9; Described higher limit is 1.1.
The Advantageous Effects of the technical scheme that the embodiment of the present invention proposes is: because operating flow range is divided into several intervals according to uninterrupted by the method, a flow value is determined in each interval, as the calibration value in this interval, and the sensor voltage value measured corresponding to each calibration value, after obtaining outflow-voltage curve, flow-voltage curve and normal flow-voltage curve are compared, judge whether the magnitude of voltage ratio the magnitude of voltage that all flow value down-off-voltage curves are corresponding is corresponding with normal flow-voltage curve is more than or equal to lower limit and is less than or equal to higher limit, if, then judge that flow sensor degree of accuracy is qualified, otherwise, then judge that flow sensor degree of accuracy is defective, so adopt the method namely can avoid the air-flow providing stably large discharge, avoid the restriction that some place can not provide the air-flow of stably large discharge, also every platform flow transducer of anesthesia apparatus is calibrated, improve measuring accuracy, the corresponding measuring accuracy also improving the core index tidal volume of Anesthesia machine.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing the embodiment of the present invention is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the content of the embodiment of the present invention and these accompanying drawings.
Fig. 1 is the flow transducer of anesthesia apparatus calibration steps process flow diagram that the inventive method embodiment provides;
Fig. 2 is flow-voltage curve that the inventive method embodiment provides.
Embodiment
The technical matters solved for making the present invention, the technical scheme of employing and the technique effect that reaches are clearly, be described in further detail below in conjunction with the technical scheme of accompanying drawing to the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the flow transducer of anesthesia apparatus calibration steps process flow diagram that the inventive method embodiment provides.As shown in Figure 1, this flow transducer of anesthesia apparatus calibration steps, comprises step:
S10, according to uninterrupted the operating flow range of Anesthesia machine to be divided into that several are interval.Division rule is determined by frequency of utilization, and when a certain interval censored data uses more in actual applications, this is interval just shorter; When a certain interval censored data uses less in actual applications, this is interval just longer.
S20, determine a flow value in each interval, as the calibration value in this interval.
S30, pass into air-flow corresponding to the calibration value in each interval successively to flow sensor.This process need carries out gas flow modulation by the flow regulator of standard, can ensure as calibration value to make the air-flow of inflow flow sensor.And the sensor voltage value measured corresponding to each calibration value.
S40, sensor voltage value corresponding to each calibration value measured in step S30 draw out flow-voltage curve in flow-voltage coordinate system.
S50, the normal flow-voltage curve write in advance in the flow-voltage curve drawn in step S40 and program to be compared, described curve is got the flow value of n point as fiducial value, judge whether the magnitude of voltage ratio the magnitude of voltage that the flow value down-off-voltage curve of described n point is corresponding is corresponding with the normal flow-voltage curve write in advance in program is more than or equal to lower limit and is less than or equal to higher limit, if so, then judge that flow sensor degree of accuracy is qualified; Otherwise, then judge that flow sensor degree of accuracy is defective, described n>=1.
In the present embodiment, in step s 40, the method obtaining outflow-voltage curve comprises the following steps:
In flow-voltage coordinate system, mark the coordinate points that the sensor voltage value measured in several calibration values step S30 corresponding is respectively corresponding, and be connected by each coordinate points straight line, curve obtained is flow-voltage curve.
In the present embodiment, preferably, in step slo, the operating flow range of Anesthesia machine is 0L/min-110L/min, the gas flow flowing through flow sensor is divided into three sections, is respectively 0L/min-10L/min, 15L/min-40L/min, 45L/min-110L/min.But the gas flow flowing through flow sensor is not limited to and is divided into three sections, also can be greater than three sections.Divide the endpoint value of every section to be not limited thereto, also can get other values.The interval of every section is also not limited to this.
In the present embodiment, preferably, in step S20, the calibration value span of 0L/min-10L/min section is 4L/min-6L/min; The calibration value span of 15L/min-40L/min section is 20L/min-30L/min; The calibration value span of 45L/min-110L/min section is 40L/min-60L/min.Certainly, the calibration value span of every section is not limited thereto, and also can get other scope.
In the present embodiment, as further preferred version, the calibration value value of 0L/min-10L/min section is 5L/min; The calibration value value of 15L/min-40L/min section is 25L/min; The calibration value value of 45L/min-110L/min section is 50L/min.Selected value is optimal value above, and when getting this calibration value, the measuring accuracy of flow sensor is the highest.
In the present embodiment, preferably, described lower limit span is 0.8-0,95; Described higher limit span is 1.05-1.2.But the span of lower limit and higher limit is not limited thereto.
In the present embodiment, as further preferred version, described lower limit is 0,9; Described higher limit is 1.1.
0L/min-10L/min is divided into, 15L/min-40L/min, 45L/min-110L/min tri-sections with the gas flow flowing through flow sensor; The calibration value value of 0L/min-10L/min section is 5L/min; The calibration value value of 15L/min-40L/min section is 25L/min; The calibration value value of 45L/min-110L/min section is 50L/min; Lower limit is 0,9, and described higher limit is 1.1 is example, is described calibration steps.
First, pass into the air-flow of 5L/min, 25L/min, 50L/min successively to flow sensor, this process need carries out gas flow modulation by the flow regulator of standard, can ensure as calibration value to make the air-flow of inflow flow sensor.And sensor voltage value corresponding when passing into the air-flow of 0L/min, 5L/min, 25L/min, 50L/min successively by magnitude of voltage checkout equipment measuring flow sensor.
Then in flow-voltage coordinate system, mark the coordinate points of the sensor voltage value of the air-flow difference correspondence of 0L/min, 5L/min, 25L/min, 50L/min, and each coordinate points is connected with straight line successively, curve obtained is flow-voltage curve, as shown in Figure 2.
Finally compared by the normal flow-voltage curve write in advance in the flow-voltage curve drawn and program, whether the magnitude of voltage ratio that the magnitude of voltage that when judging that gas flow values is 1L/min, flow-voltage curve is corresponding is corresponding with the normal flow-voltage curve write in advance in program is more than or equal to 0.9 and is less than or equal to 1.1.The like, use identical method judge respectively gas flow values for 2L/min, 3L/min, 4L/min, 5L/min until 110L/min time magnitude of voltage corresponding to the flow-voltage curve magnitude of voltage ratio corresponding with the normal flow-voltage curve write in advance in program whether be all more than or equal to 0.9 and be less than or equal to 1.1, if so, then judge that flow sensor degree of accuracy is qualified; Otherwise, then judge that flow sensor degree of accuracy is defective.If flow sensor degree of accuracy is defective, then further improvement of production process, finally makes flow sensor degree of accuracy qualified.
In the present embodiment, when the flow-voltage curve drawn and normal flow-voltage curve being compared, the point of selected gas flow values can be integer, can be also non-integer, determine as the case may be.
Adopt the method namely can avoid the air-flow providing stably large discharge, avoid the restriction that some place can not provide the air-flow of stably large discharge, also every platform flow transducer of anesthesia apparatus is calibrated, improve measuring accuracy, the corresponding measuring accuracy also improving the core index tidal volume of Anesthesia machine.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (7)
1. a flow transducer of anesthesia apparatus calibration steps, is characterized in that, comprises step:
S10, according to uninterrupted the operating flow range of Anesthesia machine to be divided into that several are interval;
S20, determine a flow value in each interval, as the calibration value in this interval;
S30, pass into air-flow corresponding to the calibration value in each interval successively to flow sensor, and measure the sensor voltage value corresponding to each calibration value;
S40, sensor voltage corresponding to each calibration value measured in step S30 are worth outflow-voltage curve;
S50, the flow-voltage curve drawn in step S40 and normal flow-voltage curve to be compared, described curve is got the flow value of n point as fiducial value, judge whether the magnitude of voltage ratio the magnitude of voltage that the flow value down-off-voltage curve of described n point is corresponding is corresponding with normal flow-voltage curve is more than or equal to lower limit and is less than or equal to higher limit, if so, then judge that flow sensor degree of accuracy is qualified; Otherwise, then judge that flow sensor degree of accuracy is defective, described n>=1.
2. flow transducer of anesthesia apparatus calibration steps as claimed in claim 1, it is characterized in that, in step s 40, the method obtaining outflow-voltage curve comprises the following steps:
In flow-voltage coordinate system, mark the coordinate points that the sensor voltage value measured in several calibration values step S30 corresponding is respectively corresponding, and be connected by each coordinate points straight line, curve obtained is flow-voltage curve.
3. flow transducer of anesthesia apparatus calibration steps as claimed in claim 2, it is characterized in that, in step slo, the operating flow range of Anesthesia machine is 0L/min-110L/min, the gas flow flowing through flow sensor is divided into three sections, be respectively 0L/min-10L/min, 15L/min-40L/min, 45L/min-110L/min.
4. flow transducer of anesthesia apparatus calibration steps as claimed in claim 3, it is characterized in that, in step S20, the calibration value span of 0L/min-10L/min section is 4L/min-6L/min; The calibration value span of 15L/min-40L/min section is 20L/min-30L/min; The calibration value span of 45L/min-110L/min section is 40L/min-60L/min.
5. flow transducer of anesthesia apparatus calibration steps as claimed in claim 4, it is characterized in that, the calibration value value of 0L/min-10L/min section is 5L/min; The calibration value value of 15L/min-40L/min section is 25L/min; The calibration value value of 45L/min-110L/min section is 50L/min.
6. flow transducer of anesthesia apparatus calibration steps as claimed in claim 1, it is characterized in that, described lower limit span is 0.8-0,95; Described higher limit span is 1.05-1.2.
7. flow transducer of anesthesia apparatus calibration steps as claimed in claim 6, it is characterized in that, described lower limit is 0,9; Described higher limit is 1.1.
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| CN112827034A (en) * | 2020-12-31 | 2021-05-25 | 北京谊安医疗系统股份有限公司 | Calibration system and method for air suction valve of pneumatic electric control anesthesia machine |
| CN114082059A (en) * | 2021-12-24 | 2022-02-25 | 河北谊安奥美医疗设备有限公司 | Automatic calibration device and method for anesthesia machine |
| CN114271809A (en) * | 2021-12-08 | 2022-04-05 | 知心健(南京)科技有限公司 | Manual calibration method and system for human body respiratory flow test |
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