A greenhouse gas assessment method for environmental monitoring

Abstract

The present application relates to the field of environmental monitoring technology and discloses a greenhouse gas assessment method for environmental monitoring. The method comprises configuring a sample gas, establishing a first relationship and a second relationship based on a first measurement result of the sample gas, monitoring a target gas in the greenhouse based on a preset period, and establishing a third relationship based on a second measurement result of the target gas, setting and determining a wavelength monitoring interval based on a preset absorbance, obtaining the concentration corresponding to the absorbance of the sample gas within the wavelength monitoring interval based on the second relationship, and then calculating the concentration of the target gas based on the first relationship and the third relationship, and obtaining and determining the remaining power of a sensor component power supply when the concentration of the target gas decreases or increases relative to the most recently obtained gas concentration at the time of target gas acquisition, and adjusting the gas monitoring period and wavelength monitoring interval based on the remaining power of the sensor component power supply. The present application can ensure the continuity of gas concentration data and the accuracy of measurement.

Description

Technical Field

[0001] The present application relates to the technical field of environmental monitoring, and in particular to a greenhouse gas assessment method for environmental monitoring. Background Art

[0002] In order to accurately monitor and evaluate greenhouse gases, traditional monitoring methods have limited monitoring range and are difficult to meet environmental monitoring needs.

[0003] Similar prior art includes a Chinese patent application with publication number CN114441670A, which discloses a method for monitoring and evaluating dissolved gases in transformer oil, relating to the technical field of transformer status assessment. The assessment method includes the following steps: first, the content of dissolved gases in the insulating oil is measured in real time using an online transformer oil chromatography monitoring system. A connected backend computer system can extract and display the information collected by the monitoring system; then, the three characteristic gas content values ​​of acetylene, total hydrocarbons, and hydrogen collected by the monitoring system are converted into corresponding gas scores according to a score function relationship; finally, the main transformer score representing the operating status of the transformer is obtained based on the three gas scores. The monitoring system includes an alarm unit that can issue a first-level warning and a second-level alarm based on the set attention value and alarm conditions, respectively. This invention can analyze the characteristic gas content values ​​in the transformer oil to obtain the main transformer score to assess the operating status of the transformer.

[0004] Similar prior art includes Chinese patent application CN118858533A, which provides a greenhouse gas assessment method for a carbon sink intelligent monitoring system. The method involves first establishing a fixed monitoring plot, deploying carbon dioxide, methane, and nitrous oxide detectors, determining the average age of the entire forest, and calculating a baseline carbon sink based on the average age of the entire forest. Based on this baseline carbon sink, the carbon dioxide balance of the entire forest is assessed, combined with the detected carbon dioxide balance and the methane and nitrous oxide values ​​over a period of time. This inventive method, by establishing a carbon sink intelligent monitoring system, forms a new method for assessing greenhouse gas emissions.

[0005] However, the gas assessment methods in the above two applications do not take into account the continuity and accuracy of greenhouse gas concentration monitoring. Summary of the Invention

[0006] To solve the above technical problems, the present application provides a greenhouse gas assessment method for environmental monitoring, which can ensure the continuity of the concentration data of the monitored greenhouse gases and improve the accuracy of gas concentration measurements.

[0007] In a first aspect, the present application provides a greenhouse gas assessment method for environmental monitoring, the method comprising:

[0008] Step S1: configuring a sample gas, and establishing a first relationship and a second relationship based on a first measurement result of the sample gas;

[0009] Step S2: Based on a preset period, the gas analyzer monitors the target gas in the greenhouse, and establishes a third relationship based on a second measurement result of the target gas;

[0010] Step S3: setting and determining a wavelength monitoring interval based on a preset absorbance, obtaining a concentration corresponding to the absorbance of the sample gas within the wavelength monitoring interval based on the second relationship, and then calculating the concentration of the target gas based on the first relationship and the third relationship;

[0011] Step S4: When the concentration of the target gas decreases or increases from the most recently acquired concentration of the target gas, the remaining power of the sensor component power supply is acquired and determined, and the gas monitoring period and the wavelength monitoring interval are adjusted based on the remaining power of the sensor component power supply.

[0012] In combination with the first aspect, in a first implementation of the first aspect of the present application, step S1 further includes:

[0013] Prepare sample gases of various concentrations, use the light-emitting component of the gas analyzer to emit light of different wavelengths to a container containing the sample gas, calculate and record the absorbance of the sample gas of each concentration at each wavelength of light as a first measurement result, and based on the first measurement result, establish a first relationship between the wavelength of light corresponding to the same concentration and the absorbance of the sample gas by light, and a second relationship between the absorbance of light corresponding to the sample gas by light at the same wavelength and the concentration of the sample gas.

[0014] In combination with the first aspect, in a second implementation of the first aspect of the present application, step S2 further includes:

[0015] The absorbance of the target gas to light at each wavelength is measured and recorded as a second measurement result, and based on the second measurement result, a third relationship between the wavelength of light in the target gas and the absorbance of the target gas to light is established, wherein the type of the target gas is the same as the type of the sample gas.

[0016] In combination with the first aspect, in a third implementation of the first aspect of the present application, setting the preset absorbance includes:

[0017] Based on the first relationship, the maximum absorbance of the sample gas to light at different wavelengths is obtained as a first absorbance, and a preset absorbance is set based on the first absorbance, wherein the preset absorbance is less than or equal to the first absorbance.

[0018] In combination with the first aspect, in a fourth implementation of the first aspect of the present application, determining the wavelength monitoring interval includes:

[0019] Based on the preset absorbance, multiple target wavelengths whose absorbance at each wavelength is less than or equal to the preset absorbance are obtained from the third relationship, and the smallest wavelength among the target wavelengths is used as the starting wavelength of the wavelength monitoring interval, and the largest wavelength among the target wavelengths is used as the ending wavelength of the wavelength monitoring interval.

[0020] In combination with the first aspect, in a fifth implementation of the first aspect of the present application, adjusting the wavelength monitoring interval includes:

[0021] The maximum absorbance in the third relationship is taken as the second absorbance. If the second absorbance is less than the preset absorbance, the wavelength corresponding to the second absorbance is obtained as the starting wavelength of the wavelength monitoring interval, and the maximum wavelength in the second measurement result is used as the ending wavelength of the wavelength monitoring interval; if the second absorbance is greater than or equal to the preset absorbance, the wavelength corresponding to the preset absorbance is obtained as the starting wavelength of the wavelength monitoring interval, and the maximum wavelength in the second measurement result is used as the ending wavelength of the wavelength monitoring interval.

[0022] In combination with the first aspect, in a sixth implementation of the first aspect of the present application, calculating the concentration of the target gas includes:

[0023] Based on the second relationship, obtain the concentration corresponding to the absorbance of the sample gas, compare the first relationship and the third relationship, and calculate the average value of the ratio of the absorbance of the target gas to the absorbance of the sample gas to light at each wavelength within the wavelength monitoring range; based on the average value, calculate the concentration of the target gas, wherein the concentration of the target gas is equal to the concentration corresponding to the absorbance of the sample gas multiplied by the average value.

[0024] In combination with the first aspect, in a seventh implementation of the first aspect of the present application, step S4 further includes:

[0025] When the remaining power of the sensor component power supply is less than or equal to a preset percentage of the total power of the sensor component power supply, if the concentration of the target gas is decreasing from the gas concentration last obtained at the target gas acquisition time, the period of the gas analyzer monitoring the gas in the greenhouse is extended; if the concentration of the target gas is increasing from the gas concentration last obtained at the target gas acquisition time, the period of the gas analyzer monitoring the gas in the greenhouse is shortened.

[0026] In combination with the first aspect, in an eighth implementation of the first aspect of the present application, step S4 further includes:

[0027] If the period of the gas analyzer monitoring the gases in the greenhouse is extended, then when measuring the current target gas concentration, the starting wavelength of the wavelength monitoring interval is increased based on the wavelength monitoring interval corresponding to the most recently obtained gas concentration; if the period of the gas analyzer monitoring the gases in the greenhouse is shortened, then when measuring the current target gas concentration, the starting wavelength of the wavelength monitoring interval is reduced based on the wavelength monitoring interval corresponding to the most recently obtained gas concentration.

[0028] In conjunction with the first aspect, in a ninth implementation of the first aspect of the present application, calculating the absorbance of the sample gas at each concentration at each wavelength of light includes:

[0029] By formula The absorbance of the sample gas to light at each wavelength is calculated, wherein f represents the absorbance of the sample gas to light, q0 represents the incident intensity of light, and q1 represents the intensity of light after passing through the sample gas.

[0030] Compared with the prior art, the beneficial effects of the present invention are at least as follows:

[0031] In the technical solution provided in this application, by configuring a sample gas, first measuring the absorbance of the sample gas, and then analyzing the concentration of greenhouse gases in the monitoring environment with reference to the absorbance of the sample gas, a first relationship is established based on the first measurement result of the sample gas, namely the relationship between the wavelength and absorbance corresponding to each concentration, and a second relationship, namely the relationship between concentration and absorbance, which provides a reference basis for subsequent greenhouse gas assessment. By monitoring based on a preset cycle, the gas concentration in the greenhouse can be continuously obtained, facilitating the timely detection and response to abnormal gas concentrations. For each monitoring cycle, the wavelength of the target gas and the corresponding absorbance data are calculated and recorded. Based on the second measurement result of the target gas, the relationship between the wavelength of the target gas and the absorbance is established as a third relationship.

[0032] The maximum absorbance of the sample gas is used to set a preset absorbance, providing a reference for determining the wavelength monitoring interval. Within the wavelength monitoring interval, the concentration corresponding to the sample gas absorbance is obtained based on the second relationship, and the concentration of the target gas is then calculated based on the first and third relationships, thereby increasing the accuracy of the calculated target gas concentration data. When the target gas concentration decreases or increases relative to the most recently acquired target gas concentration, the remaining power of the sensor assembly power supply is obtained and determined. Based on the remaining power of the sensor assembly power supply, the gas monitoring period and wavelength monitoring interval are adjusted to ensure the continuity of the monitored greenhouse gas concentration data and the accuracy of the gas concentration measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 Schematic diagram of a greenhouse gas assessment method for environmental monitoring in an embodiment of the present application;

[0035] Figure 2 This is a schematic diagram of a gas analyzer installed in a greenhouse in an embodiment of the present application;

[0036] Figure 3 The first measurement result of the sample gas in the embodiment of the present application;

[0037] Figure 4 Schematic diagram of the relationship between wavelength and absorbance when the carbon dioxide concentration is 200 ppm in the embodiment of the present application;

[0038] Figure 5 Schematic diagram of the concentration of carbon dioxide corresponding to different absorbances at a wavelength of 1550nm in the embodiment of the present application;

[0039] Figure 6 The second measurement result of the target gas in the embodiment of the present application;

[0040] Figure 7 Schematic diagram of the relationship between the wavelength and absorbance of the target gas in the embodiment of the present application;

[0041] Figure 8 Schematic diagram of the relationship between wavelength and absorbance in an embodiment of the present application when the concentration of the target gas is lower than the concentration of the sample gas;

[0042] Figure 9 This is a schematic diagram of the relationship between wavelength and absorbance in an embodiment of the present application when the concentration of the target gas is higher than the concentration of the sample gas. DETAILED DESCRIPTION

[0043] The present application embodiment provides a kind of greenhouse gas assessment method for environmental monitoring. The term "first", "second", "third", "fourth" etc. (if any) in the specification and claims of the present application and the above-mentioned drawings is used to distinguish similar objects, and is not necessarily used to describe a specific order or precedence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiment described here can be implemented in an order other than the content illustrated or described here. In addition, the term "including" or "having" and any variation thereof are intended to cover non-exclusive inclusion, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0044] For ease of understanding, the specific process of the embodiment of the present application is described below. Figure 1 In one embodiment of the present application, a greenhouse gas assessment method for environmental monitoring includes:

[0045] Installing gas analyzers in greenhouses, see Figure 2 As shown, the gas analyzer includes a spectrum component, a light emitting component, a container for containing gas, and a sensor component. The light emitting component can generate light of multiple wavelengths.

[0046] Step S1: configuring a sample gas, and establishing a first relationship and a second relationship based on a first measurement result of the sample gas.

[0047] Specifically, when evaluating greenhouse gases, the directly measured greenhouse gas concentration in the environment may be interfered with by various factors, such as the nonlinear absorption characteristics of the gas, interference from other gases, etc., which will lead to inaccurate measurement results. Therefore, by configuring the sample gas, first measure the absorbance of the sample gas, and then analyze the concentration of greenhouse gases in the monitoring environment with reference to the absorbance of the sample gas. Assuming that the concentration of carbon dioxide in the greenhouse is to be evaluated, based on the above step S1, for example, a series of carbon dioxide sample gases with known concentrations are configured, and the known concentrations are 100ppm, 200ppm, 500ppm and 800ppm, etc., and a gas analyzer is used to measure the absorbance of each concentration of carbon dioxide sample gas at different wavelengths, including introducing the sample gas into the container of the gas analyzer, using a light-emitting component to irradiate the sample gas, measuring the light intensity at different wavelengths, and calculating the absorbance at each wavelength based on the intensity of the incident light and the intensity of the light after passing through the sample gas. Figure 3 Is the first measurement result of the sample gas. The specific calculation method of absorbance will be described below. Based on the first measurement result, the first relationship is established, that is, the relationship between the wavelength and absorbance corresponding to each concentration, and the relationship curve between wavelength and absorbance is drawn. See Figure 4The relationship between wavelength and absorbance when the carbon dioxide concentration is 200 ppm is shown; a second relationship is also established, that is, the relationship between concentration and absorbance. For each wavelength, a curve of the relationship between concentration and absorbance is drawn, see Figure 5 The absorbance corresponding to different concentrations of carbon dioxide at a wavelength of 1550nm is shown. Step S1 provides a reference for subsequent greenhouse gas assessments, ensuring the accuracy of the monitoring results. In addition to carbon dioxide, this method is also applicable to monitoring other greenhouse gases, such as methane and nitrous oxide, while ensuring monitoring accuracy under different environmental conditions.

[0048] Step S2: Based on a preset period, the gas analyzer monitors the target gas in the greenhouse, and establishes a third relationship based on a second measurement result of the target gas.

[0049] Specifically, in order to continuously and in real time monitor the gas concentration in the greenhouse and obtain the changes in gas concentration over time, in the above step S2, the gas analyzer automatically monitors the gas in the greenhouse according to a preset period, such as once an hour. During each monitoring, the gas analyzer measures the absorbance of carbon dioxide in the greenhouse. For each monitoring period, the wavelength and the corresponding absorbance data are calculated and recorded, see Figure 6 The measurement result of the target gas shown is the second measurement result. The relationship between the wavelength and absorbance of the target gas is established and used as the third relationship. Figure 7 By monitoring at preset intervals, the gas concentration in the greenhouse can be continuously acquired, facilitating timely detection and response to abnormal gas concentrations.

[0050] Step S3: Set and determine the wavelength monitoring interval based on the preset absorbance, obtain the concentration corresponding to the absorbance of the sample gas within the wavelength monitoring interval based on the second relationship, and then calculate the concentration of the target gas based on the first relationship and the third relationship.

[0051] Specifically, the preset absorbance is set based on the maximum absorbance of the sample gas, and the specific settings will be described below. By setting the preset absorbance, a basis is provided for determining the wavelength monitoring interval. By comparing the relationship between the absorbance of the sample gas to light and the absorbance of the target gas to light at the same wavelength, combined with the known concentration of the sample gas, the concentration of the target gas is calculated. Within the wavelength monitoring interval, the absorbance decreases with increasing wavelength. The relationship between the absorbance and concentration within the wavelength monitoring interval can ensure that the calculated target gas concentration data is more accurate. The method for calculating the concentration of the target gas will be described in detail below.

[0052] Step S4: When the concentration of the target gas decreases or increases compared to the most recently acquired concentration of the target gas, the remaining power of the sensor component power supply is obtained and determined, and the gas monitoring period and wavelength monitoring interval are adjusted based on the remaining power of the sensor component power supply.

[0053] Specifically, during the long-term monitoring of greenhouse gases according to a preset cycle, the power supply of the sensor assembly, such as the remaining power of the battery, will gradually decrease. The sensor may be deployed in an environment where space is restricted and charging is inconvenient, resulting in an inability to charge in time. At this time, a method is needed to dynamically adjust the monitoring cycle to maintain continuous monitoring of gas concentrations. Through the above-mentioned step S4, the remaining power of the power supply of the sensor assembly can be effectively managed, the gas monitoring cycle can be optimized, and it can be ensured that the gas concentration in the greenhouse can be continuously and accurately monitored under different power supply states. By extending the monitoring cycle, monitoring interruptions caused by power exhaustion are avoided. After the gas monitoring cycle is adjusted, the wavelength monitoring interval is adjusted to make the measurement of gas concentration more accurate.

[0054] Through the coordination of the above steps, the present application can ensure the continuity of the monitored greenhouse gas concentration data and improve the accuracy of gas concentration measurement, and is particularly suitable for complex and changeable atmospheric environment monitoring.

[0055] Furthermore, step S1 further includes: preparing sample gases of various concentrations, emitting light of different wavelengths into a container containing the sample gases using a light emitting component of a gas analyzer, calculating and recording the absorbance of each concentration of the sample gases at each wavelength of light as a first measurement result, and establishing, based on the first measurement result, a first relationship between the wavelength of light corresponding to the same concentration and the absorbance of the sample gases, and a second relationship between the absorbance of the sample gases at the same wavelength and the concentration of the sample gases. The first relationship describes the absorption of light by sample gases of different concentrations at different wavelengths, and the second relationship describes how absorbance varies with concentration at the same wavelength.

[0056] Specifically, see Figure 3 The first measurement result shown is a curve of wavelength versus absorbance for each concentration of sample gas. Figure 4 The wavelength-absorbance curve shown is for a carbon dioxide concentration of 200 ppm. Analyze the characteristics of the curve to determine in which wavelength ranges the absorbance decreases with increasing wavelength, and in which wavelength ranges the absorbance increases or is irregular with increasing wavelength. For each wavelength, also plot the absorbance-concentration curve at different concentrations, see Figure 5 As shown in the figure, the absorbance relationship curve corresponding to different concentrations of carbon dioxide at a wavelength of 1550nm.

[0057] Furthermore, the above-mentioned step S2 also includes: measuring and recording the absorbance of the target gas to light at each wavelength as a second measurement result, and based on the second measurement result, establishing a third relationship between the wavelength of light in the target gas and the absorbance of the target gas to light, wherein the type of the target gas is the same as the type of the sample gas.

[0058] Specifically, by measuring the absorbance of the target gas at different wavelengths, a relationship between wavelength and absorbance can be established as a third relationship, providing a basis for calculating the concentration of the target gas. If monitoring other gases, simply configure the sample gas to be the same type as the target gas being monitored.

[0059] Furthermore, setting the preset absorbance includes: based on the first relationship, obtaining the maximum absorbance of the sample gas to light at different wavelengths as the first absorbance, and setting the preset absorbance based on the first absorbance, wherein the preset absorbance is less than or equal to the first absorbance.

[0060] Specifically, through practical application measurements, the absorbance of carbon dioxide at different wavelengths is obtained, see Figure 4 The relationship curve shown is Figure 4 Find the maximum absorbance among the absorbances of the sample gas to light, that is, the first absorbance. For example, at a wavelength of 1530nm, the maximum absorbance is 0.47, then set the preset absorbance to 0.47. Setting the preset absorbance can effectively avoid the interference of absorbance and wavelength in the rapidly rising area on the calculated gas concentration, improve the accuracy of concentration measurement, and provide a basis for determining and adjusting the wavelength monitoring range.

[0061] Furthermore, determining the wavelength monitoring interval includes:

[0062] Based on the preset absorbance, multiple target wavelengths whose absorbance at each wavelength is less than or equal to the preset absorbance are obtained from the third relationship, and the smallest wavelength among the target wavelengths is used as the starting wavelength of the wavelength monitoring interval, and the largest wavelength among the target wavelengths is used as the ending wavelength of the wavelength monitoring interval.

[0063] Specifically, from the third relationship, the wavelength monitoring intervals where all the absorbances of the target gas to light are less than or equal to the preset absorbance are screened out, and the wavelength monitoring intervals where the target gas to light absorbance is less than or equal to the preset absorbance are selected. Figure 7As can be seen in the figure, within the wavelength range of 1550nm to 1600nm, the absorbance is less than 0.47. From the selected target wavelengths, find the minimum wavelength. For example, within the wavelength range of 1550nm to 1600nm, the minimum wavelength is 1550nm. From the selected target wavelengths, find the maximum wavelength. For example, within the wavelength range of 1550nm to 1600nm, the maximum wavelength is 1600nm. Outside the wavelength range of 1550nm to 1600nm, the absorbance increases rapidly, and the relationship between wavelength and absorbance is abnormal. To ensure the accuracy of the measured quantity, select the wavelength range of 1550nm to 1600nm as the wavelength monitoring range, so that the calculated gas concentration results are more accurate.

[0064] Furthermore, adjusting the wavelength monitoring interval includes: using the maximum absorbance in the third relationship as the second absorbance; if the second absorbance is less than a preset absorbance, obtaining the wavelength corresponding to the second absorbance as the starting wavelength of the wavelength monitoring interval, and the maximum wavelength in the second measurement result as the ending wavelength of the wavelength monitoring interval; if the second absorbance is greater than or equal to the preset absorbance, obtaining the wavelength corresponding to the preset absorbance as the starting wavelength of the wavelength monitoring interval, and the maximum wavelength in the second measurement result as the ending wavelength of the wavelength monitoring interval. The maximum absorbance in the third relationship as the second absorbance refers to the maximum absorbance of carbon dioxide in the greenhouse at different wavelengths.

[0065] Specifically, because traditional gas analyzers can only provide accurate measurement results within a specific concentration range, the equipment needs to be replaced if the concentration range is exceeded. This application uses the above method to adjust the wavelength monitoring range to adapt to a wider range of gas concentration measurements. For example, to monitor the concentration of carbon dioxide in a greenhouse, see Figure 8 As shown, when the concentration of carbon dioxide in the greenhouse is lower than the concentration of the sample gas, the maximum absorbance of carbon dioxide at different wavelengths is obtained, that is, the second absorbance mentioned above. In the wavelength range of 1500nm to 1600nm, the second absorbance is 0.4, and the wavelength corresponding to the second absorbance is 1530nm. Then the wavelength of 1530nm to 1600nm is defined as the wavelength monitoring interval, because the absorbance in this interval decreases with increasing wavelength, and the calculated gas concentration is more accurate.

[0066] See also Figure 9As shown, when the concentration of carbon dioxide in the target gas is higher than that of the sample gas, the preset absorbance is obtained. In the wavelength range of 1550nm to 1600nm, the absorbance is less than the preset absorbance of 0.47. The wavelength corresponding to the preset absorbance is 1550nm. Then the wavelength of 1550nm to 1600nm is set as the wavelength monitoring interval. Compared with when the concentration of carbon dioxide is low, the wavelength monitoring interval used to calculate the wavelength when the concentration of carbon dioxide is high is smaller, because only in this interval does the absorbance decrease with the increase of wavelength, and the obtained gas concentration can be more accurate. By dynamically adjusting the wavelength monitoring interval, the present application can maintain the accuracy of measurement within a larger gas concentration range, enhancing its applicability in different application scenarios.

[0067] Furthermore, calculating the concentration of the target gas includes: based on the second relationship, obtaining the concentration corresponding to the absorbance of the sample gas, comparing the first relationship and the third relationship, and calculating the average value of the ratio of the absorbance of the target gas to light to the absorbance of the sample gas to light at each wavelength within the wavelength monitoring range; based on the average value, calculating the concentration of the target gas, wherein the concentration of the target gas is equal to the concentration corresponding to the absorbance of the sample gas multiplied by the average value.

[0068] Specifically, taking the concentration of target gas as lower than the concentration of sample gas as a reference, multiple ratios of the absorbance of target gas to the absorbance of sample gas at each wavelength in the wavelength monitoring range of 1530nm to 1600nm are calculated, 0.4 / 0.47=0.851, 0.2 / 0.3=0.667,..., 0.038 / 0.038=1, and then the average value of the multiple ratios is calculated to be equal to 0.886. Then, the concentration corresponding to the absorbance of sample gas to light obtained from the second relationship is 200ppm, and the concentration of target gas = 200*0.886=177.2ppm.

[0069] Furthermore, step S4 further includes: when the remaining power of the sensor assembly power supply is less than or equal to a preset percentage of the total power of the sensor assembly power supply, if the concentration of the gas most recently acquired since the target gas acquisition time is decreasing, then extending the period during which the gas analyzer monitors the greenhouse gases; and if the concentration of the gas most recently acquired since the target gas acquisition time is increasing, then shortening the period during which the gas analyzer monitors the greenhouse gases. This reduces the monitoring frequency and power consumption, thereby ensuring continuity of gas monitoring even when the power supply is insufficient.

[0070] Furthermore, if the cycle of the gas analyzer monitoring greenhouse gases is extended, then when measuring the current target gas concentration, the starting wavelength of the wavelength monitoring interval is increased by one adjacent wavelength based on the wavelength monitoring interval corresponding to the most recently acquired gas concentration, thereby reducing the wavelength monitoring interval and improving the accuracy of gas concentration measurement. If the cycle of the gas analyzer monitoring greenhouse gases is shortened, then when measuring the current target gas concentration, the starting wavelength of the wavelength monitoring interval is reduced by one adjacent wavelength based on the wavelength monitoring interval corresponding to the most recently acquired gas concentration, thereby increasing the wavelength monitoring interval and covering a wider range of gas concentrations. By increasing or decreasing the wavelength monitoring interval, the gas concentration measurement results are made more accurate.

[0071] Further, the absorbance of each concentration of the sample gas at each wavelength of light is calculated, including: using the formula Calculate the absorbance of the sample gas to light at each wavelength, where f represents the absorbance of the sample gas to light, q0 represents the incident intensity of light, and q1 represents the intensity of light after passing through the sample gas.

[0072] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described systems, systems and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0073] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program code.

[0074] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A greenhouse gas assessment method for environmental monitoring, characterized in that: The method comprises: Step S1: configuring a sample gas, and establishing a first relationship and a second relationship based on a first measurement result of the sample gas; The step S1 further includes: preparing sample gases of various concentrations, emitting light of different wavelengths to a container containing the sample gases using a light emitting component of the gas analyzer, calculating and recording the absorbance of the sample gases of each concentration at each wavelength of light as a first measurement result, and establishing, based on the first measurement result, a first relationship between the wavelength of light corresponding to the same concentration and the absorbance of the sample gases by light, and a second relationship between the absorbance of the sample gases by light corresponding to the same wavelength and the concentration of the sample gases; Step S2: Based on a preset period, using a gas analyzer to monitor a target gas in the greenhouse, and establishing a third relationship based on a second measurement result of the target gas; The step S2 further includes: measuring and recording the absorbance of the target gas to light at each wavelength as a second measurement result, and establishing a third relationship between the wavelength of light in the target gas and the absorbance of the target gas to light based on the second measurement result, wherein the type of the target gas is the same as the type of the sample gas; Step S3: setting and determining a wavelength monitoring interval based on a preset absorbance, obtaining a concentration corresponding to the absorbance of the sample gas within the wavelength monitoring interval based on the second relationship, and then calculating the concentration of the target gas based on the first relationship and the third relationship; Setting the preset absorbance includes: based on the first relationship, obtaining the maximum absorbance of the sample gas to light at different wavelengths as a first absorbance, and setting the preset absorbance based on the first absorbance, wherein the preset absorbance is less than or equal to the first absorbance; Determining the wavelength monitoring interval includes: based on the preset absorbance, obtaining from the third relationship a plurality of target wavelengths whose absorbance at each wavelength is less than or equal to the preset absorbance, using the smallest wavelength among the target wavelengths as the starting wavelength of the wavelength monitoring interval, and using the largest wavelength among the target wavelengths as the ending wavelength of the wavelength monitoring interval; Calculating the concentration of the target gas based on the first relationship and the third relationship includes: obtaining a concentration corresponding to the absorbance of the sample gas based on the second relationship, comparing the first relationship with the third relationship, and calculating an average value of a ratio of the absorbance of the target gas to the absorbance of the sample gas at each wavelength within the wavelength monitoring interval; and calculating the concentration of the target gas based on the average value, wherein the concentration of the target gas is equal to the concentration corresponding to the absorbance of the sample gas multiplied by the average value; Step S4: When the concentration of the target gas decreases or increases from the most recently acquired concentration of the target gas, the remaining power of the sensor component power supply is acquired and determined, and the gas monitoring period and the wavelength monitoring interval are adjusted based on the remaining power of the sensor component power supply.

2. The method according to claim 1, characterized in that Adjusting the wavelength monitoring interval includes: Taking the maximum absorbance in the third relationship as the second absorbance, and if the second absorbance is less than the preset absorbance, obtaining the wavelength corresponding to the second absorbance as the starting wavelength of the wavelength monitoring interval, and the maximum wavelength in the second measurement result as the ending wavelength of the wavelength monitoring interval; If the second absorbance is greater than or equal to the preset absorbance, the wavelength corresponding to the preset absorbance is obtained as the starting wavelength of the wavelength monitoring interval, and the maximum wavelength in the second measurement result is used as the ending wavelength of the wavelength monitoring interval.

3. The method according to claim 1, characterized in that The step S4 further includes: When the remaining power of the sensor component power supply is less than or equal to a preset percentage of the total power of the sensor component power supply, if the concentration of the target gas is decreasing from the gas concentration last obtained at the target gas acquisition time, the period of the gas analyzer monitoring the gas in the greenhouse is extended; if the concentration of the target gas is increasing from the gas concentration last obtained at the target gas acquisition time, the period of the gas analyzer monitoring the gas in the greenhouse is shortened.

4. The method according to claim 3, characterized in that The step S4 further includes: If the period of the gas analyzer monitoring the gases in the greenhouse is extended, then when measuring the current target gas concentration, the starting wavelength of the wavelength monitoring interval is increased based on the wavelength monitoring interval corresponding to the most recently obtained gas concentration; if the period of the gas analyzer monitoring the gases in the greenhouse is shortened, then when measuring the current target gas concentration, the starting wavelength of the wavelength monitoring interval is reduced based on the wavelength monitoring interval corresponding to the most recently obtained gas concentration.

5. The method according to claim 1, wherein Calculate the absorbance of the sample gas at each concentration at each wavelength of light, including: By formula Calculate the absorbance of the sample gas to light at each wavelength, where: represents the absorbance of the sample gas to light, q0 represents the incident intensity of light, and q1 represents the intensity of light after passing through the sample gas.

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