CN117723527A - Optimized control method of oxygen partial pressure sensor, electronic equipment and storage medium - Google Patents
Optimized control method of oxygen partial pressure sensor, electronic equipment and storage medium Download PDFInfo
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- 239000001301 oxygen Substances 0.000 title claims abstract description 99
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 99
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 81
- 238000003860 storage Methods 0.000 title claims abstract description 22
- 230000014509 gene expression Effects 0.000 claims abstract description 95
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000004590 computer program Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000004020 luminiscence type Methods 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000005284 excitation Effects 0.000 description 14
- 230000003287 optical effect Effects 0.000 description 12
- 238000012545 processing Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000010791 quenching Methods 0.000 description 7
- 230000000171 quenching effect Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012886 linear function Methods 0.000 description 2
- 150000002926 oxygen Chemical class 0.000 description 2
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
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- 238000007619 statistical method Methods 0.000 description 1
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Abstract
The application relates to an optimal control method, electronic equipment and a storage medium of an oxygen partial pressure sensor, wherein the numerical value of a parameter to be fitted in the working process of the oxygen partial pressure sensor is acquired; performing association fitting on parameters to be fitted according to the values of the parameters to be fitted to obtain a first expression; generating a second expression according to the first expression and the Stern-Volmer equation, wherein the second expression is an expression of the driving current with respect to temperature and phase; and obtaining a driving current according to the second expression and the real-time working parameter, and controlling the oxygen partial pressure sensor to work according to the driving current. According to the technical scheme, the driving current of the oxygen partial pressure sensor is controlled by fitting part of parameters in the operation of the oxygen partial pressure sensor, so that the error of the oxygen partial pressure sensor can be reduced, and the measurement accuracy of the oxygen concentration is improved.
Description
Technical Field
The application relates to the technical field of oxygen sensors, in particular to an optimal control method of an oxygen partial pressure sensor, electronic equipment and a storage medium.
Background
The fluorescence quenching method oxygen partial pressure sensor is an advanced technology for high-precision nondestructive monitoring of oxygen concentration. The method realizes accurate measurement of the oxygen concentration through fluorescence quenching reaction, and has the advantages of high precision, no damage, quick response, good stability and the like. In the application in the fields of industry, environment, medical treatment and the like, the fluorescence quenching method oxygen partial pressure sensor plays an important role, helps enterprises to improve the product quality, protects the environment and ensures personnel safety.
In the course of conception and implementation of the present application, the applicant has found at least the following problems: the existing fluorescence quenching method oxygen partial pressure sensor is mainly suitable for-10-50 ℃, and the fluorescence quenching method oxygen partial pressure sensor has great application potential in the fields of aviation, aerospace, navigation and the like, and the application temperature of the application fields can reach-40-70 ℃. The fluorescence quenching method oxygen partial pressure sensor used in the existing normal temperature environment cannot be suitable for the part of the scene. In addition, the existing fluorescence quenching method oxygen partial pressure sensor has the problems of poor precision, large error and the like under the condition of high oxygen.
Disclosure of Invention
Aiming at the technical problems, the application provides an optimal control method, electronic equipment and storage medium of an oxygen partial pressure sensor, wherein the driving current of the oxygen partial pressure sensor is controlled by fitting partial parameters in the working process of the oxygen partial pressure sensor, so that the error of the oxygen partial pressure sensor can be reduced, and the measurement accuracy of the oxygen concentration is improved.
In order to solve the above technical problems, the present application provides an optimization control method of an oxygen partial pressure sensor, including:
collecting the numerical value of a parameter to be fitted in the working process of the oxygen partial pressure sensor;
performing association fitting on the parameters to be fitted according to the values of the parameters to be fitted to obtain a first expression;
generating a second expression according to the first expression and the Stern-Volmer equation, wherein the second expression is an expression of driving current with respect to temperature and phase;
and obtaining a driving current according to the second expression and the real-time working parameter, and controlling the oxygen partial pressure sensor to work according to the driving current.
Optionally, the parameter to be fitted includes at least two of a driving current, a fluorescence amplitude and a fluorescence luminescence intensity of the oxygen partial pressure sensor, and the performing association fitting on the parameter to be fitted according to the value of the parameter to be fitted to obtain a first expression, including:
drawing a scatter diagram according to the numerical value of at least one group of parameters to be fitted;
determining a linear and/or nonlinear fitting method according to a discrete point distribution rule in the scatter diagram;
and performing function fitting on the parameters to be fitted based on the fitting method to obtain a first expression.
Optionally, the performing function fitting on the parameter to be fitted based on the fitting method to obtain a first expression, and further includes:
if the fitting method is nonlinear, nonlinear fitting is carried out on the parameters to be fitted to obtain a nonlinear fitting expression;
performing linear fitting on the parameters to be fitted to obtain a linear fitting expression;
and if the error between the linear fitting result and the nonlinear fitting result is smaller than or equal to a preset value, determining the linear fitting expression as a first expression.
Optionally, when the parameters to be fitted are fluorescence intensity and driving current, the first expression is:
wherein I is 0 Is the luminous intensity under the anaerobic condition; k (k) 1 Is a calibration coefficient; i.e d Is the driving current of the oxygen partial pressure sensor.
Optionally, when the parameters to be fitted are fluorescence intensity and fluorescence amplitude, the first expression is:
wherein V is the fluorescence amplitude detected under the aerobic condition; v (V) 0 Is the fluorescence amplitude detected under anaerobic conditions; i is fluorescence luminous intensity under the aerobic condition; k (k) 2 Is a calibration coefficient; i c Is the critical value of fluorescence intensity.
Optionally, the second expression is:
wherein i is d A drive current for the oxygen partial pressure sensor; k (K) po2 Is a Stern-Volmer constant; k (k) 1 、k 2 、k 3 Is a calibration coefficient; θ is the phase under aerobic conditions; θ 0 Is the phase under anaerobic condition; p (P) O2 Is the partial pressure of oxygen; k (T) is a second order expression for temperature T, i.eWherein a is 1 、a 2 、a 3 Is the calibration coefficient.
Optionally, the method further comprises:
deforming the second expression into an approximate three-coefficient second-order expression:
wherein E (T), F (T), G (T) are second order expressions with respect to temperature T, i.eWherein a is 51 、a 52 、a 53 、a 61 、a 62 、a 63 、a 71 、a 72 、a 73 For calibrating coefficient。
Optionally, after the generating the second expression according to the first expression and the stem-Volmer equation, the method further includes:
under the preset temperature condition, the driving current of the oxygen partial pressure sensor is regulated;
measuring a fluorescence amplitude that varies with a variation of the drive current;
stopping adjusting the driving current when the fluorescence amplitude reaches the critical value of the linear interval and the nonlinear interval;
and determining the calibration coefficient in the second expression according to the recorded temperature, phase and driving current.
The application also provides electronic equipment, which comprises a storage medium and a controller, wherein the storage medium is stored with a computer program, and the computer program realizes the steps of the optimized control method of the oxygen partial pressure sensor when being executed by the controller.
The present application also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method for optimizing control of an oxygen partial pressure sensor as described above.
As described above, the optimized control method, the intelligent terminal and the storage medium of the oxygen partial pressure sensor provided by the application collect the numerical value of the parameter to be fitted in the working process of the oxygen partial pressure sensor; performing association fitting on parameters to be fitted according to the values of the parameters to be fitted to obtain a first expression; generating a second expression according to the first expression and the Stern-Volmer equation, wherein the second expression is an expression of the driving current with respect to temperature and phase; and obtaining a driving current according to the second expression and the real-time working parameter, and controlling the oxygen partial pressure sensor to work according to the driving current. According to the technical scheme, the driving current of the oxygen partial pressure sensor is controlled by fitting part of parameters in the operation of the oxygen partial pressure sensor, so that the error of the oxygen partial pressure sensor can be reduced, and the measurement accuracy of the oxygen concentration is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic diagram of the structure of an oxygen partial pressure sensor.
Fig. 2 is a flow chart illustrating an optimized control method of an oxygen partial pressure sensor according to an embodiment of the present application.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings. Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the element defined by the phrase "comprising one … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element, and furthermore, elements having the same name in different embodiments of the present application may have the same meaning or may have different meanings, a particular meaning of which is to be determined by its interpretation in this particular embodiment or by further combining the context of this particular embodiment.
It should be noted that, in this document, step numbers such as S401 and S402 are adopted, and the purpose of the present invention is to more clearly and briefly describe the corresponding content, and not to constitute a substantial limitation on the sequence, and those skilled in the art may execute S402 before S401 in the implementation, which are all within the scope of protection of the present application.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The following provides a detailed description of what is presented in connection with the various figures.
An oxygen partial pressure sensor is a device for measuring the partial pressure of oxygen in a gas mixture or body fluid. The oxygen partial pressure monitoring system can convert the partial pressure of oxygen into an electric signal or a digital signal, so that the real-time monitoring and recording of the oxygen partial pressure are realized. Fig. 1 is a schematic diagram of the structure of an oxygen partial pressure sensor. As shown in fig. 1, the oxygen partial pressure sensor includes an optical signal supply device 1, a photoelectric conversion device 2, and an electrical signal processing device 3. The optical signal providing apparatus 1 includes an excitation lamp 11, a reference lamp 12, a spectroscope 13, and an optical filter 14. The reference lamp 12 and the excitation lamp 11 are disposed on the same straight line, and the light directions are respectively directed toward each other when light is emitted. The spectroscope 13 is disposed at the midpoint of the straight line where the reference lamp 12 and the excitation lamp 11 are located, and the filter 14 is disposed on the optical path where the fluorescent substance 4 emits fluorescence. An optical filter 15 is arranged between the excitation lamp 11 and the spectroscope 13, and an attenuation sheet 16 is arranged between the reference lamp 12 and the spectroscope 13.
In the oxygen partial pressure detection, the fluorescent substance 4, the spectroscope 13 and the optical filter 14 are arranged on one straight line, and the reference lamp 12, the spectroscope 13 and the excitation lamp 11 are arranged on the other straight line, and the two straight lines are perpendicular to each other. The electric signal processing device 3 is electrically connected to the reference lamp 12 and the excitation lamp 11, and is configured to send a light emission command to the reference lamp 12 and the excitation lamp 11, so that the reference lamp 12 and the excitation lamp 11 emit light.
The electric signal processing device 3 sends out a luminous instruction to the excitation lamp 11, so that the excitation lamp 11 sends out excitation light, the excitation light 11 is reflected to the fluorescent substance 4 through the spectroscope 13 arranged in the light path direction, the fluorescent substance 4 sends out fluorescence and passes through the spectroscope 13 and then passes through the optical filter 14, the fluorescence reaches the photoelectric conversion device 2 to be converted into a fluorescence electric signal, and the fluorescence electric signal is processed by the electric signal processing device 3. The electric signal processing device 3 sends out a luminous instruction to the reference lamp 12, so that the reference lamp 12 emits reference light, the reference light is reflected by the spectroscope 13 arranged in the light path direction and then directly passes through the optical filter 14, the reference light reaches the photoelectric conversion device 2 to be converted into a reference photoelectric signal, and the reference photoelectric signal is processed by the electric signal processing device 3.
The photoelectric conversion device 2 includes a photodetector, an amplifying circuit, and a filter circuit electrically connected in this order. The photodetector is used for converting the optical signal passing through the optical filter into an electrical signal. Since the fluorescence intensity is weak, the fluorescence electric signal is amplified by the amplifying circuit. After the fluorescent electric signal is amplified, noise is amplified, and the amplified fluorescent electric signal is filtered by a filter circuit. The photoelectric conversion device 2 is electrically connected to the electric signal processing device 3, and is configured to transmit the converted electric signal to the electric signal processing device 3.
In order to solve the problems of large error, low precision and the like of an oxygen partial pressure sensor in the prior art, the embodiment of the application provides an optimal control method of the oxygen partial pressure sensor. Fig. 2 is a flow chart illustrating an optimized control method of an oxygen partial pressure sensor according to an embodiment of the present application. As shown in fig. 2, the method for optimizing and controlling the oxygen partial pressure sensor of the present application includes:
s401: and acquiring the numerical value of the parameter to be fitted in the working process of the oxygen partial pressure sensor.
The oxygen partial pressure sensor relates to various parameters in the working process, and through theoretical analysis and test data, the correlation relationship among one or more groups of parameters can be determined. And the parameters with the association relation are subjected to association fitting, so that key influence factors can be intuitively and specifically analyzed. Based on the analysis, it is determined that the parameters to be fitted include at least two of a drive current, a fluorescence amplitude, and a fluorescence emission intensity of the oxygen partial pressure sensor. Wherein, based on analysis, the drive current of the known oxygen partial pressure sensor and the fluorescence luminous intensity have positive correlation, and the fluorescence amplitude has positive correlation with the fluorescence luminous intensity. The driving current is the current that drives the oxygen partial pressure sensor to operate. The fluorescence emission intensity is the emission intensity of fluorescence emitted from the fluorescent substance 4 after excitation. The fluorescence amplitude refers to the amplitude of the electric signal detected by the electric signal processing device after the emitted fluorescence passes through the photoelectric conversion device 2.
It should be noted that when the value of the parameter to be fitted in the working process of the oxygen partial pressure sensor is collected, the parameter variable which does not participate in fitting should be controlled, so that the accuracy of the fitting result is ensured. For example, when the parameters to be fitted are the driving current and the fluorescence intensity, it should be ensured that the values of temperature, oxygen concentration and fluorescent substance content, the intensities of the reference light and the excitation light, the waveform, etc. remain unchanged during the data acquisition.
S402: and performing associated fitting on the parameters to be fitted according to the values of the parameters to be fitted, so as to obtain a first expression.
In an embodiment, the parameters to be fitted include at least two of a driving current, a fluorescence amplitude and a fluorescence luminescence intensity of the oxygen partial pressure sensor, and the performing associated fitting on the parameters to be fitted according to the value of the parameters to be fitted to obtain a first expression, including:
drawing a scatter diagram according to the numerical value of at least one group of parameters to be fitted;
determining a linear and/or nonlinear fitting method according to a discrete point distribution rule in the scatter diagram;
and performing function fitting on parameters to be fitted based on a fitting method to obtain a first expression.
Here, according to the collected values of one or more groups of parameters x and y to be fitted, a scatter diagram of x and y is drawn so as to intuitively show the association relationship of x and y. Based on the distribution rule of the inner scattered points in the scattered points, judging whether linear or nonlinear fitting is needed. And selecting a proper fitting method according to the characteristics of the data. For linear fitting, statistical methods such as least squares can be used; for non-linear fitting, more complex optimization algorithms, such as gradient descent, etc., need to be used. The data is then fitted using the selected fitting method to find the best fit parameters. For linear fitting, a best fit line can be found by solving a system of linear equations; for non-linear fits, it may be necessary to use iterative algorithms to find the best fit curve or surface.
In an embodiment, performing function fitting on parameters to be fitted based on a fitting method to obtain a first expression, and further including:
if the fitting method is nonlinear, nonlinear fitting is carried out on parameters to be fitted to obtain a nonlinear fitting expression;
performing linear fitting on parameters to be fitted to obtain a linear fitting expression;
and if the error between the linear fitting result and the nonlinear fitting result is smaller than or equal to a preset value, determining that the linear fitting expression is a first expression.
Here, in order to better describe the relationship between the parameters to be fitted, nonlinear fitting may be performed first. And taking the nonlinear fitting result as a reference, and performing linear fitting. The accuracy of the linear fit results is then assessed. With the nonlinear fitting result as a reference, if the error of the linear fitting result relative to the nonlinear fitting result does not exceed 5%, the relationship between the parameters to be fitted may be described using the linear fitting, i.e., the expression of the linear fitting is determined to be the first expression.
Of course, in other embodiments, the fitting may also be performed in a piecewise fashion. That is, for a portion in a scatter plot that is linearly distributed, a linear fit is employed; for the portion of the nonlinear distribution, a nonlinear fit is employed.
S403: a second expression is generated from the first expression and the Stern-Volmer equation, the second expression being an expression of the drive current with respect to temperature and phase.
S404: and obtaining a driving current according to the second expression and the real-time working parameter so as to control the oxygen partial pressure sensor to work.
The following describes the implementation procedure of the method in the embodiment of the present application in detail:
according to the Stern-Volmer equation, the expression between the fluorescence emission intensity, the fluorescence average lifetime and the oxygen partial pressure of a fluorescent substance:
(1)
in the method, in the process of the invention,is the luminous intensity under the anaerobic condition; />Is the luminous intensity under the aerobic condition; />Is the average fluorescence lifetime under anaerobic conditions; />Is the average fluorescence lifetime under aerobic conditions; when the fluorescence lifetime is measured by a frequency domain method, +.>Is the phase under anaerobic conditions, +.>Is the phase under aerobic conditions. And->、/>And->Are all functions of temperature; p (P) O2 Is the partial pressure of oxygen; k (K) PO2 Is the Stern-Volmer constant.
And (3) deriving the two sides of the formula (1):
(2)
when the parameters to be fitted are fluorescence luminous intensity and driving current, the first expression comprises a linear function, namely, when the luminous intensity is in vacuum, the linear relation of the LED driving current is as follows:
(3)
wherein I is 0 Is the luminous intensity under the anaerobic condition; k (k) 1 Is a coefficient constant; d is the driving current of the oxygen partial pressure sensor.
From formulas (1) and (3), it is possible to obtain:
(4)
wherein I is fluorescence luminous intensity under the aerobic condition; k (k) 1 Is a coefficient constant; θ is the phase under aerobic conditions; θ 0 Is the phase under anaerobic condition; i.e d Is the driving current of the oxygen partial pressure sensor.
When the parameters to be fitted are fluorescence intensity and fluorescence amplitude, the first expression further includes a piecewise function:
(5)
wherein V is the fluorescence amplitude detected under the aerobic condition; v (V) 0 Is the fluorescence amplitude detected under anaerobic conditions; i is fluorescence luminous intensity under the aerobic condition; k (k) 2 Is a coefficient constant, I c Is the critical value of fluorescence intensity. From equation (5), I<I c When I and V are in linear relation; i>I c When I and V are nonlinear.
In one embodiment, when the parameters to be fitted are fluorescence intensity and phase background noise, the first expression further includes a linear function:
(6)
wherein delta theta is phase background noise, V is fluorescence amplitude detected under aerobic condition, and k 3 Is a coefficient constant.
The phase background noise is inversely proportional to the fluorescence amplitude V, and according to formulas (1) and (3), the phase background noise is obtained as a piecewise function with respect to the luminous intensity:
(7)
when the light emission intensity does not exceed the detection limit value, substitution of formulas (4) and (7) in formula (2) yields:
(8)
the expression (i.e., the second expression) of the driving current, which is obtainable from the formula (8), is:
(9)
wherein i is d A drive current for the oxygen partial pressure sensor; i 0 Is the fluorescence luminous intensity under the anaerobic condition; k (K) po2 Is a Stern-Volmer constant; k (k) 1 、k 2 、k 3 Is a coefficient constant; θ is the phase under aerobic conditions; θ 0 Is the phase under anaerobic condition; p (P) O2 Is the partial pressure of oxygen; k (T) is a second order expression for temperature T, i.eWherein a is 1 、a 2 、a 3 Is the calibration coefficient.
The second expression of the third order of the single coefficient can be expanded into the expression of the second order of the three coefficients by taking other influencing factors existing in actual use into consideration:
(10)
in the method, in the process of the invention,e (T), F (T), G (T) are second order expressions with respect to temperature T, i.eWherein a is 51 、a 52 、a 53 、a 61 、a 62 、a 63 、a 71 、a 72 、a 73 Is the calibration coefficient.
In one embodiment, after generating the second expression from the first expression and the Stern-Volmer equation, the method further includes:
under the preset temperature condition, the driving current of the oxygen partial pressure sensor is regulated;
measuring a fluorescence amplitude that varies with a variation of the drive current;
stopping adjusting the driving current when the fluorescence amplitude reaches the critical value of the linear interval and the nonlinear interval;
and determining the calibration coefficient in the second expression according to the recorded temperature, phase and driving current.
Here, the calibration coefficients in the second expression may be realized by a pre-calibration manner. The pre-calibration method comprises the steps of selecting isothermal points at-40 ℃, 10 ℃, 35 ℃, 50 ℃ and 70 ℃, wherein the number of the isothermal points is not less than 4, each temperature value corresponds to 7-8 oxygen partial pressure values, and the method at least comprises a high-temperature high-oxygen environment and a low-temperature low-oxygen environment. The driving current of the oxygen partial pressure sensor is regulated, so that the fluorescence amplitude values under different temperatures and different oxygen partial pressures can be obtained. As the drive current increases, the fluorescence amplitude also increases. The temperature, phase and magnitude of the drive current are recorded for the fluorescence amplitude over the linear interval. Substituting a plurality of sets (at least 28 sets) of known temperature values, drive current values and phase values into the second expression to obtain a plurality of sets of polynomials comprising the calibration coefficients, and solving the polynomials to obtain the values of the calibration coefficients.
Thus, by controlling the change of the fluorescence amplitude and the change of the driving current in the linear range, nonlinear errors caused by excessively high driving current or fluorescence luminous intensity can be effectively avoided. In addition, the calibration coefficients in the driving current expression are respectively calibrated at the extreme temperature point, so that the oxygen partial pressure sensor can keep the driving current and the fluorescence luminous intensity to change linearly under the extreme temperature or oxygen concentration environment, and the near background noise under different temperatures and oxygen partial pressures can be realized. The driving current is adjusted to control the fluorescence amplitude to change in the linear interval, so that the error of the oxygen partial pressure sensor is kept linear and consistent in the whole, the nonlinear error is reduced, the signal-to-noise ratio of the oxygen partial pressure sensor under high temperature, high oxygen and low temperature is improved, and the detection accuracy of the oxygen concentration is improved.
As described above, the optimized control method, the intelligent terminal and the storage medium of the oxygen partial pressure sensor provided by the application collect the numerical value of the parameter to be fitted in the working process of the oxygen partial pressure sensor; performing association fitting on parameters to be fitted according to the values of the parameters to be fitted to obtain a first expression; generating a second expression according to the first expression and the Stern-Volmer equation, wherein the second expression is an expression of the driving current with respect to temperature and phase; and obtaining a driving current according to the second expression and the real-time working parameter so as to control the oxygen partial pressure sensor to work. According to the technical scheme, the driving current of the oxygen partial pressure sensor is controlled by fitting part of parameters in the operation of the oxygen partial pressure sensor, so that the error of the oxygen partial pressure sensor can be reduced, and the measurement accuracy of the oxygen concentration is improved.
The application also provides an electronic device comprising a storage medium and a controller, the storage medium having stored thereon a computer program which, when executed by the controller, implements the steps of the method as described in the above embodiments.
The present application also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method as described in the above embodiments.
It can be understood that the above scenario is merely an example, and does not constitute a limitation on the application scenario of the technical solution provided in the embodiments of the present application, and the technical solution of the present application may also be applied to other scenarios. For example, as one of ordinary skill in the art can know, with the evolution of the system architecture and the appearance of new service scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.
The units in the device of the embodiment of the application can be combined, divided and pruned according to actual needs.
In this application, the same or similar term concept, technical solution, and/or application scenario description will generally be described in detail only when first appearing, and when repeated later, for brevity, will not generally be repeated, and when understanding the content of the technical solution of the present application, etc., reference may be made to the previous related detailed description thereof for the same or similar term concept, technical solution, and/or application scenario description, etc., which are not described in detail later.
In this application, the descriptions of the embodiments are focused on, and the details or descriptions of one embodiment may be found in the related descriptions of other embodiments.
The technical features of the technical solutions of the present application may be arbitrarily combined, and for brevity of description, all possible combinations of the technical features in the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the present application.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as above, including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, a controlled terminal, or a network device, etc.) to perform the method of each embodiment of the present application.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable devices. The computer instructions may be stored in a storage medium or transmitted from one storage medium to another storage medium, for example, from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line), or wireless (e.g., infrared, wireless, microwave, etc.) means. The storage media may be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains an integration of one or more available media. Usable media may be magnetic media (e.g., floppy disks, storage disks, magnetic tape), optical media (e.g., DVD), or semiconductor media (e.g., solid State Disk (SSD)), among others.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (10)
1. An optimization control method of an oxygen partial pressure sensor is characterized by comprising the following steps:
collecting the numerical value of a parameter to be fitted in the working process of the oxygen partial pressure sensor;
performing association fitting on the parameters to be fitted according to the values of the parameters to be fitted to obtain a first expression;
generating a second expression according to the first expression and the Stern-Volmer equation, wherein the second expression is an expression of driving current with respect to temperature and phase;
and obtaining a driving current according to the second expression and the real-time working parameter, and controlling the oxygen partial pressure sensor to work according to the driving current.
2. The method of claim 1, wherein the parameters to be fitted include at least two of a driving current, a fluorescence amplitude and a fluorescence luminescence intensity of an oxygen partial pressure sensor, and the performing the correlation fitting on the parameters to be fitted according to the values of the parameters to be fitted to obtain a first expression includes:
drawing a scatter diagram according to the numerical value of at least one group of parameters to be fitted;
determining a linear and/or nonlinear fitting method according to a discrete point distribution rule in the scatter diagram;
and performing function fitting on the parameters to be fitted based on the fitting method to obtain a first expression.
3. The method according to claim 2, wherein the performing, based on the fitting method, the function fitting on the parameters to be fitted to obtain a first expression includes:
if the fitting method is nonlinear, nonlinear fitting is carried out on the parameters to be fitted to obtain a nonlinear fitting expression;
performing linear fitting on the parameters to be fitted to obtain a linear fitting expression;
and if the error between the linear fitting result and the nonlinear fitting result is smaller than or equal to a preset value, determining the linear fitting expression as a first expression.
4. The method of claim 2, wherein when the parameters to be fitted are fluorescence intensity and driving current, the first expression is:
wherein I is 0 Is the luminous intensity under the anaerobic condition; k (k) 1 Is a calibration coefficient; i.e d Is the driving current of the oxygen partial pressure sensor.
5. The method of claim 4, wherein when the parameters to be fitted are fluorescence intensity and fluorescence amplitude, the first expression is:
wherein V is the fluorescence amplitude detected under the aerobic condition; v (V) 0 Is the fluorescence amplitude detected under anaerobic conditions; i is fluorescence luminous intensity under the aerobic condition; k (k) 2 Is a calibration coefficient; i c Is the critical value of fluorescence intensity.
6. The method of claim 5, wherein the second expression is:
wherein i is d A drive current for the oxygen partial pressure sensor; k (K) po2 Is a Stern-Volmer constant; k (k) 1 、k 2 、k 3 Is a calibration coefficient; θ is the phase under aerobic conditions; θ 0 Is the phase under anaerobic condition; p (P) O2 Is the partial pressure of oxygen; k (T) is a second order expression for temperature T, i.eWherein a is 1 、a 2 、a 3 Is the calibration coefficient.
7. The method according to claim 6, further comprising:
deforming the second expression into an approximate three-coefficient second-order expression:
wherein E (T), F (T), G (T) are second order expressions with respect to temperature T, i.eWherein a is 51 、a 52 、a 53 、a 61 、a 62 、a 63 、a 71 、a 72 、a 73 Is the calibration coefficient.
8. The method of claim 6 or 7, wherein after the generating a second expression from the first expression and the stem-Volmer equation, the method further comprises:
under the preset temperature condition, the driving current of the oxygen partial pressure sensor is regulated;
measuring a fluorescence amplitude that varies with a variation of the drive current;
stopping adjusting the driving current when the fluorescence amplitude reaches the critical value of the linear interval and the nonlinear interval;
and determining the calibration coefficient in the second expression according to the recorded temperature, phase and driving current.
9. An electronic device comprising a storage medium and a controller, characterized in that the storage medium has stored thereon a computer program which, when executed by the controller, implements the steps of the method according to any of claims 1 to 8.
10. A storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to any of claims 1 to 8.
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