A gas concentration calibration method and apparatus for carbon emission gas detection

Abstract

This application provides a gas concentration calibration method and apparatus for detecting carbon emission gases, comprising: acquiring the measured concentration values ​​of CO, CO2, and N2O of the carbon emission gas to be detected, as well as expressions for the interference of N2O on CO, the interference of CO on N2O, and the interference of CO2 on CO; establishing a system of equations based on the fact that the sum of the actual N2O concentration value and the interference of CO on N2O equals the measured N2O concentration value, and the sum of the actual CO concentration value and the interferences of N2O and CO2 on CO equals the measured CO concentration value, to obtain the actual N2O concentration value and the actual CO concentration value. This method can solve the problem of inaccurate gas concentration measurement caused by cross-interference between gases in carbon emission gases.

Description

Technical Field

[0001] This application relates to the field of gas detection technology, and in particular to a gas concentration calibration method and apparatus for detecting carbon emission gases. Background Technology

[0002] In carbon emission gas measurement environments, there are many types of gases. Due to cross-interference between gases, after the gas to be measured enters the analyzer, the sensor also reacts to non-target gases, causing errors in the reading of the target gas (too high or too low), thus resulting in inaccurate measurement results.

[0003] Depending on the characteristics of the interfering gas's reaction in the sensor, cross-interference can be divided into negative cross-interference (interfering gas reduces sensor reading) or positive cross-interference (interfering gas increases sensor reading). Obviously, cross-interference can fundamentally and directly affect the accuracy of target gas concentration measurement. Summary of the Invention

[0004] In view of this, this application provides a gas concentration calibration method and apparatus for carbon emission gas detection, in order to solve the problem in the prior art where cross-interference between different gases in carbon emission gas leads to inaccurate concentration measurement of the target gas.

[0005] In a first aspect, this application provides a gas concentration calibration method for detecting carbon emission gases, comprising:

[0006] Obtain the measured concentration values ​​of CO, CO2, and N2O of the carbon emission gas to be detected;

[0007] Using the N2O interference formula for CO and the actual N2O concentration value, the expression for the amount of N2O interference on CO is obtained;

[0008] Using the formula for the interference of CO on N2O and the actual concentration of CO, we obtain an expression for the amount of interference of CO on N2O.

[0009] The amount of interference of CO2 on CO is obtained by using the formula for the interference of CO2 on CO and the measured concentration of CO2.

[0010] Based on the fact that the sum of the actual N2O concentration and the interference of CO on N2O equals the measured N2O concentration, and the sum of the actual CO concentration and the interference of N2O and CO2 on CO equals the measured CO concentration, a system of equations is established, and the actual N2O concentration and the actual CO concentration are obtained by solving the equations.

[0011] Furthermore, using the N2O interference formula for CO and the actual N2O concentration value, an expression for the amount of N2O interference on CO is obtained; including:

[0012] Substituting the actual N2o concentration value X into the predetermined N2o interference formula y1=mx1, where m is a coefficient, x1 is the N2o concentration value, and y1 is the interference of N2o on co, we obtain the expression for the interference of N2o on co δ1: δ1=mX.

[0013] Furthermore, using the formula for the interference of CO on N2O and the actual concentration value of CO, an expression for the amount of interference of CO on N2O is obtained; including:

[0014] Substitute the actual CO concentration value Y into the predetermined formula for CO's interference with N2O: y2 = ax2 2 +bx2, where a and b are coefficients, x2 is the CO concentration, and y2 is the interference of CO on N2O. The expression for the interference δ2 of CO on N2O is: δ2=aY 2 +bY.

[0015] Furthermore, using the formula for the interference of CO2 on CO and the measured concentration of CO2, the amount of interference of CO2 on CO is obtained, including:

[0016] Substituting the measured CO2 concentration value C into the predetermined CO2 interference formula y3=px3, where p is a coefficient, x3 is the CO2 concentration value, and y3 is the amount of CO2 interference on CO, we obtain the value of the amount of CO2 interference on CO δ3: δ3=pC.

[0017] Furthermore, the system of equations established based on the fact that the sum of the actual N2o concentration and the interference of CO on N2o equals the measured N2o concentration, and the sum of the actual CO concentration and the interference of N2o and CO2 on CO equals the measured CO concentration, is as follows:

[0018] X + δ² = A

[0019] Y + δ1 + δ3 = B

[0020] Where X is the true concentration of N2o, Y is the true concentration of CO, δ1 is the interference of N2o on CO, δ2 is the interference of CO on N2o, δ3 is the interference of CO2 on CO, A is the measured concentration of N2o, and B is the measured concentration of CO.

[0021] Furthermore, the method also includes:

[0022] Different concentrations of N2O were introduced into a container equipped with a CO sensor, and the corresponding CO sensor readings were recorded. Based on the different concentrations of N2O and the corresponding CO sensor readings, the coefficient m of the N2O interference formula y1=mx1 was obtained.

[0023] Furthermore, the method also includes:

[0024] Different concentrations of CO were introduced into a container equipped with an N2O sensor, and the corresponding N2O sensor readings were recorded. Based on the different CO concentrations and the corresponding N2O sensor readings, the interference formula of CO on N2O, y2=ax2, was fitted. 2 The coefficients a and b of +bx2.

[0025] Furthermore, the method also includes:

[0026] Different concentrations of CO2 were introduced into a container equipped with a CO sensor, and the corresponding readings of the CO sensor were recorded. Based on the different concentrations of CO2 and the corresponding readings of the CO sensor, the coefficient p of the interference formula y3=px3 of CO2 on CO was obtained by fitting.

[0027] Secondly, this application provides a gas concentration calibration device for detecting carbon emission gases, comprising:

[0028] The acquisition unit is used to acquire the measured concentration values ​​of CO, CO2, and N2O of the carbon emission gas to be detected;

[0029] The first processing unit is used to obtain an expression for the amount of interference of N2O on CO using the N2O interference formula and the actual N2O concentration value.

[0030] The second processing unit is used to obtain an expression for the amount of interference of CO on N2O using the interference formula of CO on N2O and the actual concentration value of CO.

[0031] The third processing unit uses the CO2 interference formula and the measured CO2 concentration value to obtain the amount of CO2 interference on CO.

[0032] The calculation unit is used to establish a system of equations based on the fact that the sum of the actual N2o concentration value and the interference of CO on N2o equals the measured N2o concentration value, and the sum of the actual CO concentration value and the interference of N2o on CO, and the interference of CO2 on CO equals the measured CO concentration value, and solves the system of equations to obtain the actual N2o concentration value and the actual CO concentration value.

[0033] Thirdly, this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method provided in the first aspect of this application.

[0034] Fourthly, this application provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the method provided in the first aspect of this application.

[0035] This application can solve the problem of cross-interference between gases during carbon emission gas measurement, which causes inaccurate gas sensor readings, thereby improving the accuracy of carbon emission gas measurement. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 A flowchart of a gas concentration calibration method for carbon emission gas detection provided in an embodiment of this application;

[0038] Figure 2 A functional structure diagram of a gas concentration calibration device for carbon emission gas detection provided in an embodiment of this application;

[0039] Figure 3 This is a structural diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0042] First, a brief introduction to the design concept of the embodiments of this application will be given.

[0043] In carbon emission gas measurement environments, there are many types of gases. Due to cross-interference between gases, after the target gas enters the analyzer, the sensor may also react to non-target gases, causing errors in the target gas reading (too high or too low), thus leading to inaccurate measurement results. Depending on the characteristics of the interfering gas's reaction in the sensor, cross-interference can be categorized as negative cross-interference (interfering gas lowers the sensor reading) or positive cross-interference (interfering gas increases the sensor reading). Clearly, cross-interference can fundamentally and directly affect the accuracy of target gas concentration measurement.

[0044] To address the aforementioned technical problems, this application provides a gas concentration calibration method for detecting carbon emission gases.

[0045] When detecting the concentration of various gas components in carbon emission gases, N2O and CO cross-interference, and CO2 also interferes with CO. The presence of interfering gases will cause the sensor readings of N2O and CO to be inaccurate. The sensor readings consist of two parts: one part is the actual value of the interfered gas, and the other part is the influence value of the interfering gas on the interfered gas.

[0046] Experiments showed that the interference curve of N2O on co was a straight line (passing through zero, with no constant term), the interference curve of co on N2O was a quadratic curve (rising segment on the left, passing through zero, with no constant term), and the interference curve of co2 on co was a straight line (passing through zero, with no constant term).

[0047] This application introduces interfering gases of different concentrations, obtains the sensor readings of the corresponding interfering gases, and determines the interference formula between the gases based on the different concentrations of the interfering gases and the sensor readings of the interfering gases.

[0048] Based on the obtained interference formula, the influence value of the interfering gas on the target gas in the gas to be tested is obtained. Based on the fact that the sensor display value of the target gas is equal to the sum of the actual value of the target gas and the influence value of the interfering gas on the target, two linear equations in two variables are listed and solved (in the case of cross-interference, the two gases are both interfering gases and target gases), and the actual value of the target gas can be obtained.

[0049] This application can solve the problem of cross-interference between gases during carbon emission gas measurement, which causes inaccurate gas sensor readings, thereby improving the accuracy of carbon emission gas measurement, promoting carbon emission trading, and contributing to energy conservation and emission reduction.

[0050] After introducing the application scenarios and design concepts of the embodiments of this application, the technical solutions provided by the embodiments of this application will be described below.

[0051] like Figure 1As shown in the embodiment of this application, a gas concentration calibration method for carbon emission gas detection is provided, including:

[0052] Step 101: Obtain the measured concentration values ​​of CO, CO2, and N2O of the carbon emission gas to be detected;

[0053] In this embodiment of the application, the CO concentration value of the carbon emission gas to be detected can be obtained by a CO sensor; the CO2 concentration value of the carbon emission gas to be detected can be obtained by a CO2 sensor; and the N2O concentration value of the carbon emission gas to be detected can be obtained by an N2O sensor.

[0054] Step 102: Using the N2O interference formula for CO and the actual N2O concentration value, obtain the expression for the amount of N2O interference on CO;

[0055] In this embodiment of the application, the step specifically includes:

[0056] Substituting the actual N2o concentration value X into the predetermined N2o interference formula y1=mx1, where m is a coefficient, x1 is the N2o concentration value, and y1 is the interference of N2o on co, we obtain the expression for the interference of N2o on co δ1: δ1=mX.

[0057] Step 103: Using the formula for the interference of CO on N2O and the actual concentration of CO, obtain the expression for the amount of interference of CO on N2O;

[0058] In this embodiment of the application, the step specifically includes:

[0059] Substitute the actual CO concentration value Y into the predetermined formula for CO's interference with N2O: y2 = ax2 2 +bx2, where a and b are coefficients, x2 is the CO concentration, and y2 is the interference of CO on N2O. The expression for the interference δ2 of CO on N2O is: δ2=aY 2 +bY.

[0060] Step 104: Using the formula for the interference of CO2 on CO and the measured concentration of CO2, obtain the amount of interference of CO2 on CO;

[0061] In this embodiment of the application, the step specifically includes:

[0062] Substituting the measured CO2 concentration C into the predetermined interference formula y3 = px3 for CO2, where p is a coefficient, x3 is the CO2 concentration, and y3 is the interference of CO2 on CO, we obtain the interference δ3 of CO2 on CO: δ3 = pC. Since CO2 is not affected by other gases, its measured concentration is the same as its true concentration.

[0063] Step 105: Based on the fact that the sum of the actual N2o concentration value and the interference of CO on N2o equals the measured N2o concentration value, and the sum of the actual CO concentration value and the interference of N2o on CO, and the interference of CO2 on CO equals the measured CO concentration value, establish a system of equations and solve them to obtain the actual N2o concentration value and the actual CO concentration value.

[0064] In this embodiment of the application, the system of equations is established as follows:

[0065] X + δ² = A

[0066] Y + δ1 + δ3 = B

[0067] Where X is the true concentration of N2o, Y is the true concentration of CO, δ1 is the interference of N2o on CO, δ2 is the interference of CO on N2o, δ3 is the interference of CO2 on CO, A is the measured concentration of N2o, and B is the measured concentration of CO.

[0068] In this embodiment of the application, the method may further include:

[0069] A pre-set concentration of N2O is introduced into an air-filled container equipped with a CO sensor until the container is full of N2O. This process takes a period of time, and the CO sensor reading is recorded only after the container reaches a stable state. Multiple CO sensor readings are obtained by introducing multiple different concentrations of N2O according to the above process.

[0070] In this embodiment of the application, multiple N2o concentrations may include: N2o at 20% range, N2o at 50% range, and N2o at 80% range. However, this embodiment of the application does not specifically limit the N2o concentration setting, and those skilled in the art can select different concentration values ​​as needed.

[0071] Based on different N2O concentrations and the corresponding CO sensor readings, the coefficient m of the N2O interference formula y1=mx1 is obtained by fitting using the least squares method.

[0072] In the embodiments of this application, the above-described fitting method is only an example, and other fitting methods that can be conceived by those skilled in the art are all within the scope of this application.

[0073] In this embodiment of the application, the method may further include:

[0074] A pre-set concentration of CO is introduced into an air-filled container equipped with an N2O sensor until the container is full of CO. This process takes a period of time, and the reading of the N2O sensor is recorded only after a stable state is reached. Multiple N2O sensor readings are obtained by introducing multiple CO concentrations in accordance with the above process.

[0075] In this embodiment of the application, multiple concentrations of CO may include: CO at 20% range, CO at 50% range, and CO at 80% range. However, this embodiment of the application does not specifically limit the concentration setting of CO. Those skilled in the art can select different concentration values ​​as needed.

[0076] Based on different CO concentrations and the corresponding N2O sensor readings, the interference formula of CO on N2O, y2=ax2, was obtained by fitting using the least squares method. 2 The coefficients a and b of +bx2.

[0077] In the embodiments of this application, the above-described fitting method is only an example, and other fitting methods that can be conceived by those skilled in the art are all within the scope of this application.

[0078] In this embodiment of the application, the method may further include:

[0079] A pre-set concentration of CO2 is introduced into an air-filled container equipped with a CO sensor until the container is full of CO2. This process takes a period of time, and the CO sensor reading is recorded only after the container reaches a stable state. Multiple CO2 concentrations are introduced in the same manner to obtain multiple corresponding CO sensor readings.

[0080] In this embodiment, multiple CO2 concentrations may include: CO2 at 20% of the range, CO2 at 50% of the range, and CO2 at 80% of the range. However, this embodiment does not specifically limit the concentration setting of CO2. Those skilled in the art can select different concentration values ​​as needed.

[0081] Based on different CO2 concentrations and the corresponding CO sensor readings, the coefficient p of the CO2 interference formula y3=px3 is obtained by fitting using the least squares method.

[0082] In the embodiments of this application, the above-described fitting method is only an example, and other fitting methods that can be conceived by those skilled in the art are all within the scope of this application.

[0083] Based on the gas concentration calibration method for carbon emission gas detection provided in the embodiments of this application, the embodiments of this application also provide a gas concentration calibration device for carbon emission gas detection, see below. Figure 2 As shown, the gas concentration calibration device 200 for carbon emission gas detection provided in this application embodiment includes at least:

[0084] The acquisition unit 201 is used to acquire the measured concentration values ​​of CO, CO2, and N2O of the carbon emission gas to be detected;

[0085] The first processing unit 202 is used to obtain an expression for the amount of interference of N2O on CO using the N2O interference formula and the actual N2O concentration value.

[0086] The second processing unit 203 is used to obtain an expression for the amount of interference of co on N2o by using the interference formula of co on N2o and the actual concentration value of co.

[0087] The third processing unit 204 uses the CO2 interference formula and the measured CO2 concentration value to obtain the amount of CO2 interference on CO.

[0088] The calculation unit 205 is used to establish a system of equations based on the fact that the sum of the actual N2o concentration value and the interference of co on N2o equals the measured N2o concentration value, and the sum of the actual co concentration value and the interference of N2o on co, and the interference of co2 on co equals the measured co concentration value, and to solve the system of equations to obtain the actual N2o concentration value and the actual co concentration value.

[0089] It should be noted that the principle of the gas concentration calibration device 200 for carbon emission gas detection provided in this application embodiment to solve the technical problem is the same as the method provided in this application embodiment. Therefore, the implementation of the gas concentration calibration device 200 for carbon emission gas detection provided in this application embodiment can refer to the implementation of the method provided in this application embodiment, and the repeated parts will not be described again.

[0090] like Figure 3 As shown, this application embodiment also provides an electronic device 300 for implementing the gas concentration calibration method for carbon emission gas detection provided in this application embodiment. The electronic device 300 includes at least: a processor 301, a memory 302, and a computer program stored in the memory 302 and executable on the processor 301. When the processor 301 executes the computer program, it implements the gas concentration calibration method for carbon emission gas detection provided in this application embodiment.

[0091] The electronic device 300 provided in this application embodiment may further include a bus 303 connecting different components (including processor 301 and memory 302). The bus 303 represents one or more types of bus structures, including memory bus, peripheral bus, local area bus, etc.

[0092] The memory 302 may include a readable medium in the form of volatile memory, such as random access memory (RAM) 3021 and / or cache memory 3022, and may further include read-only memory (ROM) 3023.

[0093] The memory 302 may also include a program tool 3024 having a set (at least one) of program modules 3025, including but not limited to: an operating subsystem, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0094] Electronic device 300 can also communicate with one or more external devices 304 (e.g., keyboard, remote control, etc.), and with one or more devices that enable a user to interact with electronic device 300 (e.g., mobile phone, computer, etc.), and / or with any device that enables electronic device 300 to communicate with one or more other electronic devices 300 (e.g., router, modem, etc.). This communication can be performed through input / output (I / O) interface 305. Furthermore, electronic device 300 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) through network adapter 306. Figure 3 As shown, network adapter 306 communicates with other modules of electronic device 300 via bus 303. It should be understood that, although... Figure 3 As not shown, other hardware and / or software modules may be used in conjunction with electronic device 300, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, Redundant Arrays of Independent Disks (RAID) subsystems, tape drives, and data backup storage subsystems.

[0095] It should be noted that, Figure 3 The electronic device 300 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0096] This application also provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the gas concentration calibration method for carbon emission gas detection provided in this application.

[0097] Furthermore, although the operations of the method of this application are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0098] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A gas concentration calibration method for detecting carbon emission gases, characterized in that, include: Obtain the carbon emission gas to be detected Measure concentration value, Measured concentration value and Measure concentration value; use right The interference formula and The true concentration value was obtained. right The expression for the interference quantity includes: Will True concentration value Substitute the predetermined right Interference formula ,in For coefficients, for Concentration value, for right The amount of interference was obtained. right Interference amount The expression: ; use right The interference formula and The true concentration value was obtained. right The expression for the interference quantity includes: Will True concentration value Substitute the predetermined right Interference formula ,in All are coefficients. for Concentration value, for right The amount of interference was obtained. right Interference amount The expression: ; use right The interference formula and Measure the concentration value to obtain right The amount of interference includes: Measured concentration value Substitute the predetermined right Interference formula ,in For coefficients, for Concentration value, for right The amount of interference was obtained. right Interference amount Value: ; based on True concentration value and right The sum of the interference amounts equals Measure concentration value, True concentration value and right Interference amount right The sum of the interference amounts equals A system of equations was established by measuring the concentration values, and the results were obtained. True concentration value and Actual concentration value.

2. The method according to claim 1, characterized in that, based on True concentration value and right The sum of the interference amounts equals Measure concentration value, True concentration value and right Interference amount right The sum of the interference amounts equals The specific set of equations established by measuring concentration values ​​is as follows: ， ， Where X is True concentration value for True concentration value for right The amount of interference, for right The amount of interference, for right The amount of interference, A is The measured concentration value, B is... Measure the concentration value.

3. The method according to claim 1, characterized in that, The method further includes: To the installed Different concentrations of [substance / material] are introduced into the sensor's container. Record the corresponding The sensor readings are based on Different concentrations and corresponding The sensor readings were fitted to obtain right Interference formula coefficient .

4. The method according to claim 1, characterized in that, The method further includes: To the installed Different concentrations of [substance / material] are introduced into the sensor's container. Record the corresponding The sensor readings are based on Different concentrations and corresponding The sensor readings were fitted to obtain right Interference formula coefficient and .

5. The method according to claim 1, characterized in that, The method further includes: To the installed Different concentrations of [substance / material] are introduced into the sensor container. Record the corresponding The sensor readings are based on Different concentrations and corresponding The sensor readings were fitted to obtain right Interference formula coefficient .

6. A gas concentration calibration device for detecting carbon emission gases, characterized in that, include: Acquisition unit, used to acquire the carbon emission gas to be detected Measure concentration value, Measured concentration value and Measure concentration value; The first processing unit is used to utilize right The interference formula and The true concentration value was obtained. right The expression for the disturbance quantity includes... True concentration value Substitute the predetermined right Interference formula ,in For coefficients, for Concentration value, for right The amount of interference was obtained. right Interference amount The expression: ; The second processing unit is used to utilize right The interference formula and The true concentration value was obtained. right The expression for the disturbance quantity includes... True concentration value Substitute the predetermined right Interference formula Where a and b are both coefficients. for Concentration value, for right The amount of interference was obtained. right Interference amount The expression: ; The third processing unit utilizes right The interference formula and Measure the concentration value to obtain right The amount of interference, including Measured concentration value Substitute the predetermined right Interference formula ,in For coefficients, for Concentration value, for right The amount of interference was obtained. right Interference amount Value: ; Computational unit, used for... True concentration value right The sum of the interference amounts equals Measure concentration value, True concentration value and right Interference amount right The sum of the interference amounts equals A system of equations was established by measuring the concentration values, and the results were obtained. True concentration value and Actual concentration value.

7. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method as claimed in any one of claims 1-5.

Images