CN117310144A - Zero drift compensation method and device, expiration measurement equipment and storage medium - Google Patents
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- 238000005259 measurement Methods 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000004364 calculation method Methods 0.000 claims description 16
- 238000004590 computer program Methods 0.000 claims description 9
- 230000002452 interceptive effect Effects 0.000 claims description 4
- 230000009897 systematic effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 12
- 239000007789 gas Substances 0.000 description 193
- 239000003570 air Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The invention relates to the technical field of expiration detection, and discloses a zero drift compensation method, a zero drift compensation device, expiration measurement equipment and a storage medium, which are applied to the expiration measurement equipment, wherein a concentration sensor is arranged in the expiration measurement equipment, and the method comprises the following steps: before measuring the concentration of target gas in sample gas, introducing zero gas without the target gas into a measurement gas path, and acquiring a first measured value of the concentration sensor in the zero gas for the target gas; calculating a first interference value of the first measured value according to the interference gas component in the zero gas; and calculating the zero drift value of the concentration sensor according to the first interference value and the first measured value. The accuracy of the subsequent measurement of the target gas concentration is ensured by acquiring the zero drift value before actual measurement.
Description
Technical Field
The invention relates to the field of expiration measurement, in particular to a zero drift compensation method, a zero drift compensation device, expiration measurement equipment and a storage medium.
Background
Electronic devices such as sensors inevitably drift in measurement results with temperature changes, or with time, during use. Accurate measurement of end-tidal target gas is required, and zero calibration of the sensor is required. The calibration work needs to be carried out at a specific temperature by using standard gas, so that the user can not calibrate the instrument easily and can not calibrate each measurement. At the same time, the calibration needs expert knowledge, and it is difficult for an ordinary user to calibrate correctly and effectively.
Disclosure of Invention
In a first aspect, the present application provides a zero drift compensation method applied to an exhalation measurement apparatus, in which a concentration sensor is disposed, the method comprising:
before measuring the concentration of target gas in sample gas, introducing zero gas without the target gas into a measurement gas path, and acquiring a first measured value of the concentration sensor in the zero gas for the target gas;
calculating a first interference value of the first measured value according to the interference gas component in the zero gas;
and calculating the zero drift value of the concentration sensor according to the first interference value and the first measured value.
Further, the method further comprises:
introducing sample gas into the measuring gas path, and obtaining a second measured value of the target gas in the sample gas through the concentration sensor;
calculating a second interference value of the second measured value according to the interference gas component in the sample gas;
and calculating the concentration of the target gas in the sample gas according to the zero drift value, the second measured value and the second interference value.
Further, the calculating the concentration of the target gas in the sample gas according to the zero drift value, the second measurement value and the second interference value includes:
calculating the concentration by a concentration calculation expression, the concentration calculation expression being:
X=Y-Y1-S；
wherein X is the concentration, Y is the second measured value, Y1 is the second interference value of the second measured value, and S is the zero drift value.
Further, before the concentration of the target gas in the sample gas is measured, introducing zero gas without the target gas into a measurement gas path, and obtaining a first measured value of the concentration sensor in the zero gas for the target gas, wherein the method comprises the following steps:
introducing environmental gas into a gas path containing the target gas eliminator to obtain the zero gas, and then introducing the zero gas into the measurement gas path;
a first measurement value obtained by measuring the target gas by a concentration sensor is read.
Further, the calculating a first interference value of the first measurement value according to the interference gas component in the zero gas includes:
determining an interference coefficient according to the concentration sensor;
measuring a concentration of the interfering gas by the concentration sensor;
and calculating a first interference value of the first measured value according to the concentration of the interference gas and the interference coefficient.
Further, the calculating, according to the first interference value and the first measured value, a zero drift value of the concentration sensor includes:
the calculation expression of the zero drift value is as follows:
S= y-y1；
wherein S is the zero drift value, y is the first measurement value, and y1 is the first interference value.
Further, the calculation expression of the first interference value is:
y1=λa；
wherein y1 is the first interference value, λ is the interference coefficient, and a is the concentration of the interference gas.
In a second aspect, the present application further provides a zero drift compensation device applied to an exhalation measurement apparatus, in which a concentration sensor is disposed, the device comprising:
the zero gas measuring module is used for introducing zero gas without the target gas into the measuring gas path before measuring the concentration of the target gas in the sample gas, and acquiring a first measured value of the concentration sensor in the zero gas to the target gas;
the calculation module is used for calculating the interference value of the first measured value according to the interference gas component in the zero gas;
and the compensation module is used for calculating the zero drift value of the concentration sensor according to the interference value and the first measured value.
In a third aspect, the present application further provides an exhalation measurement apparatus, including an ambient gas path, a sample gas path, a measurement gas path, a processor, and a memory, where the ambient gas path contains an eliminator for eliminating a target gas, the ambient gas path and the sample gas path are respectively connected with the measurement gas path, and the memory stores a computer program, where the computer program executes the zero drift compensation method when running on the processor.
In a fourth aspect, the present application also provides a readable storage medium storing a computer program which, when run on a processor, performs the zero drift compensation method.
The invention discloses a zero drift compensation method, a zero drift compensation device, an expiration measurement device and a storage medium, which are applied to the expiration measurement device, wherein a concentration sensor is arranged in the expiration measurement device, and the method comprises the following steps: before measuring the concentration of target gas in sample gas, introducing zero gas without the target gas into a measurement gas path, and acquiring a first measured value of the concentration sensor in the zero gas for the target gas; calculating a first interference value of the first measured value according to the interference gas component in the zero gas; and calculating the zero drift value of the concentration sensor according to the first interference value and the first measured value. The zero drift value is obtained before actual measurement, so that the accuracy of the concentration of the target gas to be measured is ensured, the effectiveness of the zero drift value is also ensured, meanwhile, the whole process is simple and automatic, the calculation of the zero drift value can be completed without professional knowledge of a user, the whole process is noninductive to the user, and the user experience is enhanced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are required for the embodiments will be briefly described, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope of the present invention. Like elements are numbered alike in the various figures.
Fig. 1 shows a schematic flow chart of a zero drift compensation method according to an embodiment of the present application;
FIG. 2 shows a schematic diagram of an air path structure of an exhalation measurement apparatus according to an embodiment of the present application;
FIG. 3 illustrates a flow diagram of exhalation detection according to an embodiment of the present application;
fig. 4 shows a schematic structural diagram of a zero drift compensation device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
The terms "comprises," "comprising," "including," or any other variation thereof, are intended to cover a specific feature, number, step, operation, element, component, or combination of the foregoing, which may be used in various embodiments of the present invention, and are not intended to first exclude the presence of or increase the likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the invention belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments of the invention.
The technical scheme of this application is applied to before measuring expiration, carries out the zero drift compensation operation of check out test set, generates zero through using the ambient gas to in letting in the measurement gas circuit with zero, through the detection to zero, confirm the zero drift value, then use this zero drift value to carry out actual concentration test operation, so that the concentration of the target gas that detects can not be influenced by the zero drift phenomenon of equipment.
The technical scheme of the application is described in the following specific embodiments.
Example 1
As shown in fig. 1, the zero drift compensation method of the present embodiment includes:
step S100, before measuring the concentration of target gas in sample gas, introducing zero gas without the target gas into a measurement gas path, and obtaining a first measured value of the concentration sensor in the zero gas for the target gas;
the technical scheme of the embodiment is mainly used for operation before measurement of expiration, namely, the technical scheme is applied to expiration measurement equipment. The exhalation measuring apparatus is shown in fig. 2, and includes an ambient gas path 100, a sample gas path 200, and a measurement gas path 300, where an eliminator 101 is disposed in the ambient gas path 100, and is used for eliminating a target gas, and the eliminator 101 may be a substance such as a catalyst.
The measurement gas path 300 is provided with a concentration sensor 301, which is an electronic device for measuring the concentration of a target gas, specifically, an infrared sensor or the like. The concentration sensor 301 may have more than one type, that is, the concentration sensor for measuring the concentration of a plurality of gases may be included in the gas path 300, so as to provide a function of measuring the concentration of a plurality of gases.
As can be seen from the gas path structure in fig. 2, the ambient gas path 100 is mainly used for generating the zero gas through the ambient gas, and because the eliminator 101 is disposed in the ambient gas path 100, the ambient gas path 100 can be used for eliminating the target gas in the ambient gas, generating the zero gas, and then transmitting the zero gas to the subsequent measurement gas path. The sample gas path 200 is specially used for passing the sample gas to be tested, the ambient gas and the sample gas are separated through the two gas paths, and the sample gas is introduced while the zero gas is discharged after the first measurement value is obtained by using the zero gas measurement through the sequence of ventilation, so as to complete the subsequent detection work.
Before actually measuring the target gas in the sample gas, the embodiment performs a zero drift value test to determine what the zero drift error of the concentration sensor is in the current state.
Specifically, the ambient air is collected first, and then passed through the ambient air path 100 to obtain a zero air without the target air, and then the zero air is introduced into the measurement air path 300.
Theoretically, the concentration value measured by the concentration sensor 301 should be 0 because the target gas is not contained in the zero gas, but the first measurement value obtained is often not 0 because the zero drift exists in the concentration sensor 301 due to the too long use time and some environmental factors, that is, the non-zero data appears when the concentration sensor 301 should measure the concentration of 0, so that the first measurement value can be obtained.
The zero drift value represents a value at which the concentration sensor measures the target gas and the target gas concentration is 0. If the measured value is 0, it means that there is no zero drift value, and if it is not 0, the measured value of the sensor can be directly used, and if it is not 0, the zero drift value needs to be considered in actual measurement to compensate the actual measured value.
Step S200, calculating a first interference value of the first measured value according to the interference gas component in the zero gas;
in addition to the zero drift value, the concentration sensor may measure the concentration of the target gas in the zero gas, and the measurement result may be non-zero due to the presence of the interfering gas, for example, for an infrared sensor, when the concentration of carbon monoxide is measured in the environment where carbon dioxide is present, the concentration of the measured carbon monoxide is often interfered by the carbon dioxide, for example, the infrared sensor for detecting carbon monoxide may have a larger deviation of the detected concentration of carbon monoxide from the actual value due to the too high concentration of carbon dioxide, so that the interference value caused by the interfering gas needs to be considered.
The interference value is related to the concentration of the interference gas in the zero gas and the system performance of the concentration sensor, so that the interference coefficient can be obtained according to the system performance of the concentration sensor, and then the first interference value is calculated by measuring the concentration of the interference gas.
Specifically, the first interference value is calculated as:
y1=λa；
wherein y1 is the first interference value, λ is the interference coefficient, and a is the concentration of the interference gas. The concentration of the disturbance gas can be measured by a sensor for measuring the disturbance gas, and the disturbance factor can be obtained by a sensor for measuring the target gas, so that the first disturbance value can be obtained quickly.
And step S300, calculating the zero drift value of the concentration sensor according to the first interference value and the first measured value.
After the first interference value and the first measured value are determined, a zero drift value can be obtained, and assuming that the current drift value is S, the current measured value y=y1+s can be obtained, so that s=y-y 1.
Therefore, the embodiment realizes the calculation of the zero point drift value by manufacturing the zero gas through the ambient gas, and then the concentration of the target gas in the sample gas can be detected by using the zero point drift value.
Specifically, as shown in fig. 3, the flow of target gas concentration detection using the zero drift value includes:
and step S400, introducing sample gas into the measuring gas path, and obtaining a second measured value of the target gas in the sample gas through the concentration sensor.
The sample gas may be gas exhaled from the population, and the sample gas enters the detection gas path 300 along the sample gas path 200, and the concentration sensor in the detection gas path 300 detects the concentration of the target gas in the sample gas, so as to obtain a second measurement value.
It will be appreciated that the second measurement value at this time, which is composed of the true target gas concentration, the zero drift value and the disturbance value, is a measurement value having errors, and therefore, in order to obtain the true target gas concentration, it is also necessary to exclude these errors.
Wherein, an air pump may be disposed in the measurement air path 300, and the air pump absorbs the sample air from the sample air path 200 and eliminates the zero air in the detection air path in advance, thereby ensuring the cleanliness of the detection environment.
Step S500, calculating a second interference value of the second measurement value according to the interference gas component in the sample gas.
The second disturbance value is a value at which the disturbance gas causes the concentration detector to erroneously detect the concentration of the target gas in the sample gas.
Similar to the above step S200, the present step obtains the concentration value of the interference gas in the sample gas by the sensor capable of detecting the concentration of the interference gas, and then calculates the second interference value by combining the interference coefficient λ. The calculation expression is similar to the calculation expression of the first interference value in step S200, and the second interference value can be calculated by equivalently replacing the parameters therein, which is not described herein.
And step S600, calculating the concentration of the target gas in the sample gas according to the zero drift value, the second measured value and the second interference value.
Calculating the concentration by a concentration calculation expression, the concentration calculation expression being:
X=Y-Y1-S；
wherein X is the concentration, Y is the second measured value, Y1 is the second interference value of the second measured value, and S is the zero drift value.
I.e. by subtracting the second disturbance value and the zero drift value in the second measurement value, the actual concentration X of the target gas is obtained.
As can be seen from the above steps, the zero drift compensation method of this embodiment ensures the effectiveness of the zero drift value by detecting the zero drift value before detecting the sample gas, then collecting and introducing the sample gas, measuring the sample gas through the sample gas path 200 in the measurement gas path 300, and finally outputting the final concentration of the target gas by the calculation method as described above, thereby completing the concentration measurement of the target gas. The process is automatic, no special knowledge is required for a user, standard gas is not required to be used at a specific temperature, normal detection flow is not disturbed, the zero drift value is detected before each detection, and the compensation value is required to be used for compensation when the concentration of the target gas is detected next, so that more accurate measurement values are obtained, the measurement accuracy is improved, the use difficulty is reduced, the measurement equipment can be used for measurement operation in any environment, and the stability and the environmental adaptability of the whole equipment are improved.
Example 2
As shown in fig. 4, the present application further provides a zero drift compensation device applied to an exhalation measurement apparatus, in which a concentration sensor is disposed, the device includes:
the zero gas measurement module 10 is used for introducing zero gas without the target gas into a measurement gas path before measuring the concentration of the target gas in the sample gas, and acquiring a first measured value of the concentration sensor in the zero gas for the target gas;
a calculating module 20, configured to calculate an interference value of the first measurement value according to the interference gas component in the zero gas;
and the compensation module 30 is configured to calculate a zero drift value of the concentration sensor according to the interference value and the first measurement value.
The application also provides an expiration measuring device, which comprises an ambient gas path, a sample gas path, a measuring gas path, a processor and a memory, wherein the ambient gas path contains an eliminator for eliminating target gas, the ambient gas path and the sample gas path are respectively communicated with the measuring gas path, the memory stores a computer program, and the computer program executes the zero drift compensation method when running on the processor.
The present application also provides a readable storage medium storing a computer program which when run on a processor performs the zero drift compensation method, the method comprising: before measuring the concentration of target gas in sample gas, introducing zero gas without the target gas into a measurement gas path, and acquiring a first measured value of the concentration sensor in the zero gas for the target gas; calculating a first interference value of the first measured value according to the interference gas component in the zero gas; and calculating the zero drift value of the concentration sensor according to the first interference value and the first measured value. The zero drift value is obtained in real time, so that the subsequent detection operation is compensated, and the accuracy of concentration is improved when the sample gas is detected.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners as well. The apparatus embodiments described above are merely illustrative, for example, of the flow diagrams and block diagrams in the figures, which illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules or units in various embodiments of the invention may be integrated together to form a single part, or the modules may exist alone, or two or more modules may be integrated to form a single part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a smart phone, a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention.
Claims (10)
1. A zero drift compensation method applied to an exhalation measurement apparatus having a concentration sensor disposed therein, the method comprising:
before measuring the concentration of target gas in sample gas, introducing zero gas without the target gas into a measurement gas path, and acquiring a first measured value of the concentration sensor in the zero gas for the target gas;
calculating a first interference value of the first measured value according to the interference gas component in the zero gas;
and calculating the zero drift value of the concentration sensor according to the first interference value and the first measured value.
2. The zero drift compensation method according to claim 1, further comprising:
introducing sample gas into the measuring gas path, and obtaining a second measured value of the target gas in the sample gas through the concentration sensor;
calculating a second interference value of the second measured value according to the interference gas component in the sample gas;
and calculating the concentration of the target gas in the sample gas according to the zero drift value, the second measured value and the second interference value.
3. The zero drift compensation method according to claim 2, wherein the calculating the concentration of the target gas in the sample gas based on the zero drift value, the second measurement value, and the second disturbance value includes:
calculating the concentration by a concentration calculation expression, the concentration calculation expression being:
X=Y-Y1-S；
wherein X is the concentration, Y is the second measured value, Y1 is the second interference value of the second measured value, and S is the zero drift value.
4. The zero drift compensation method according to claim 1, wherein before measuring the concentration of the target gas in the sample gas, introducing a zero gas without the target gas into the measurement gas path, and acquiring a first measured value of the concentration sensor in the zero gas for the target gas, comprises:
introducing the ambient gas into an ambient gas circuit containing the target gas eliminator to obtain the zero gas, and then introducing the zero gas into the measurement gas circuit;
and reading a first measured value obtained by measuring the target gas by the concentration sensor.
5. The zero drift compensation method according to claim 1, wherein the calculating the first disturbance value of the first measurement value according to the disturbance gas component in the zero gas includes:
determining an interference coefficient according to the systematic error of the concentration sensor;
measuring a concentration of the interfering gas by the concentration sensor;
and calculating a first interference value of the first measured value according to the concentration of the interference gas and the interference coefficient.
6. The zero drift compensation method of claim 5, wherein the first interference value is calculated as:
y1=λa；
wherein y1 is the first interference value, λ is the interference coefficient, and a is the concentration of the interference gas.
7. The method according to claim 1, wherein calculating the zero drift value of the concentration sensor according to the first interference value and the first measured value includes:
the calculation expression of the zero drift value is as follows:
S= y-y1；
wherein S is the zero drift value, y is the first measurement value, and y1 is the first interference value.
8. A zero drift compensation device for use in an exhalation measurement apparatus having a concentration sensor disposed therein, the device comprising:
the zero gas measuring module is used for introducing zero gas without the target gas into the measuring gas path before measuring the concentration of the target gas in the sample gas, and acquiring a first measured value of the concentration sensor in the zero gas to the target gas;
the calculation module is used for calculating the interference value of the first measured value according to the interference gas component in the zero gas;
and the compensation module is used for calculating the zero drift value of the concentration sensor according to the interference value and the first measured value.
9. An exhalation measurement device, comprising an ambient gas path, a sample gas path, a measurement gas path, a processor, and a memory, wherein the ambient gas path contains an eliminator for eliminating a target gas, the ambient gas path and the sample gas path are respectively communicated with the measurement gas path, and the memory stores a computer program that executes the zero drift compensation method according to any one of claims 1 to 7 when running on the processor.
10. A readable storage medium, characterized in that it stores a computer program which, when run on a processor, performs the zero drift compensation method of any one of claims 1 to 7.
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| CN103399127A (en) * | 2013-08-16 | 2013-11-20 | 中国环境科学研究院 | Gas analyzer calibration measurement apparatus and calibration measurement method thereof |
| CN207964796U (en) * | 2018-08-06 | 2018-10-12 | 力合科技（湖南）股份有限公司 | Gas detecting system |
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| CN114814091A (en) * | 2022-04-08 | 2022-07-29 | 天津光电华典科技有限公司 | Atmospheric gaseous pollutant detection method and device and electronic equipment |
| CN116338094A (en) * | 2023-03-17 | 2023-06-27 | 青岛明华电子仪器有限公司 | Gas concentration calibration method and device for carbon emission gas detection |
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