Greenhouse gas evaluation method for environmental monitoring

Abstract

The invention relates to the technical field of environmental monitoring, and discloses a greenhouse gas evaluation method for environmental monitoring, which comprises the following steps: configuring a sample gas, and 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 on the basis of preset absorbance, acquiring the concentration corresponding to the absorbance of the sample gas in the wavelength monitoring interval on the basis of the second relationship, and calculating the concentration of the target gas on the basis of the first relationship and the third relationship; and when the concentration of the target gas is reduced or increased from the gas concentration obtained at the latest target gas obtaining time, obtaining and judging the residual electric quantity of the sensor assembly power supply, and adjusting the gas monitoring period and the wavelength monitoring interval based on the residual electric quantity of the sensor assembly power supply. According to the invention, the continuity of gas concentration data and the accuracy of measurement can be ensured.

Description

Technical Field

[0001] This 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 the problem that the monitoring range is limited and it is difficult to meet the needs of environmental monitoring.

[0003] A similar prior art is a Chinese patent application with the publication number CN114441670A, which discloses a method for monitoring and evaluating dissolved gases in transformer oil, and relates to the technical field of transformer condition assessment. The assessment method includes the following steps: First, the content of dissolved gases in insulating oil is measured in real time through an on-line monitoring system for transformer oil chromatography, and the background computer system connected to it can extract and display the information collected by the monitoring system; Then, the content values of three characteristic gases, acetylene, total hydrocarbons, and hydrogen, collected by the monitoring system are converted into corresponding gas scores according to the score function relationship; Finally, the main transformer score indicating the operating state of the transformer can be obtained based on the scores of the three gases. Among them, the monitoring system includes an alarm unit, and the alarm unit can issue a first-level warning and a second-level alarm respectively according to the set attention value and alarm conditions. This invention can analyze the main transformer score based on the content values of characteristic gases in transformer oil to evaluate the operating state of the transformer.

[0004] Another similar prior art is a Chinese patent application with the publication number CN118858533A, which provides a greenhouse gas assessment method for a carbon sink intelligent monitoring system, including first establishing a fixed monitoring plot, arranging detectors for carbon dioxide, methane, and nitrous oxide, judging the average age of the whole forest, calculating the baseline carbon sink based on the average age of the whole forest, and evaluating the carbon dioxide balance of the whole forest based on the baseline carbon sink, combined with the detected carbon dioxide balance and the detected values of methane and nitrous oxide over a period of time. The method of this invention forms a new greenhouse gas emission assessment method by establishing a carbon sink intelligent monitoring system.

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

[0006] To solve the above technical problems, this 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 measurement.

[0007] In a first aspect, this application provides a greenhouse gas assessment method for environmental monitoring, and the method includes:

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

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

[0010] Step S3: Set and determine the wavelength monitoring range based on a preset absorbance. Within the wavelength monitoring range, based on the second relationship, obtain the concentration corresponding to the absorbance of the sample gas, and then based on the first relationship and the third relationship, calculate the concentration of the target gas;

[0011] Step S4: When the concentration of the target gas decreases or increases from the gas concentration obtained most recently at the time of obtaining the target gas, obtain and judge the remaining power of the sensor component power supply, and based on the remaining power of the sensor component power supply, adjust the period of gas monitoring and the wavelength monitoring range.

[0012] Combined with the first aspect, in the first implementation manner of the first aspect of the present application, the step S1 further includes:

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

[0014] Combined with the first aspect, in the second implementation manner of the first aspect of the present application, the step S2 further includes:

[0015] Measure and record the absorbance of the target gas to light at each wavelength as the second measurement result, and based on the second measurement result, establish a third relationship between the wavelength of the light in the target gas and the absorbance of the target gas to the light, where the type of the target gas is the same as the type of the sample gas.

[0016] Combined with the first aspect, in the third implementation manner of the first aspect of the present application, setting the preset absorbance includes:

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

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

[0019] Based on the preset absorbance, obtain a plurality of target wavelengths from the third relationship where the absorbance at each wavelength is less than or equal to the preset absorbance. Take the smallest wavelength among the target wavelengths as the starting wavelength of the wavelength monitoring range, and the largest wavelength among the target wavelengths as the ending wavelength of the wavelength monitoring range.

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

[0021] Take the largest absorbance in the third relationship as the second absorbance. If the second absorbance is less than the preset absorbance, obtain the wavelength corresponding to the second absorbance as the starting wavelength of the wavelength monitoring range, and the largest wavelength in the second measurement result as the ending wavelength of the wavelength monitoring range; if the second absorbance is greater than or equal to the preset absorbance, obtain the wavelength corresponding to the preset absorbance as the starting wavelength of the wavelength monitoring range, and the largest wavelength in the second measurement result as the ending wavelength of the wavelength monitoring range.

[0022] In combination with the first aspect, in the sixth implementation manner 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 within the wavelength monitoring range, calculate 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. Based on the average value, calculate the concentration of the target gas, where 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 the seventh implementation manner of the first aspect of the present application, the 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 compared to the gas concentration obtained most recently at the target gas acquisition time, extend the period for the gas analyzer to monitor the gas in the greenhouse; if the concentration of the target gas is increasing compared to the gas concentration obtained most recently at the target gas acquisition time, shorten the period for the gas analyzer to monitor the gas in the greenhouse.

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

[0027] If the period for the gas analyzer to monitor the gas in the greenhouse is extended, when measuring the current target gas concentration, based on the wavelength monitoring range corresponding to the gas concentration obtained most recently, increase the starting wavelength of the wavelength monitoring range; if the period for the gas analyzer to monitor the gas in the greenhouse is shortened, when measuring the current target gas concentration, based on the wavelength monitoring range corresponding to the gas concentration obtained most recently, decrease the starting wavelength of the wavelength monitoring range.

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

[0029] Through the formula Calculate the absorbance of the sample gas at each wavelength, where f represents the absorbance of the sample gas to light, q 0 represents the incident intensity of light, and q 1 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 by the present application, by configuring the sample gas, first measuring the absorbance of the sample gas, and then analyzing the concentration of greenhouse gas in the monitoring environment with reference to the absorbance of the sample gas, based on the first measurement result of the sample gas, a first relationship, that is, the relationship between the wavelength corresponding to each concentration and the absorbance, and a second relationship, that is, the relationship between the concentration and the absorbance, are established, providing a reference basis for subsequent greenhouse gas evaluation. By monitoring based on a preset period, the gas concentration in the greenhouse can be continuously obtained, facilitating the timely discovery and response to abnormal gas concentration situations. For each monitoring period, calculate and record the wavelength and corresponding absorbance data of the target gas, and based on the second measurement result of the target gas, establish the relationship between the wavelength and absorbance of the target gas as a third relationship.

[0032] Also, set the preset absorbance through the maximum absorbance of the sample gas to provide a reference for determining the wavelength monitoring range. Within the wavelength monitoring range, based on the second relationship, obtain the concentration corresponding to the absorbance of the sample gas, and then based on the first relationship and the third relationship, calculate the concentration of the target gas, making the calculated concentration data of the target gas more accurate. When the concentration of the target gas decreases or increases from the gas concentration obtained most recently at the time of target gas acquisition, obtain and judge the remaining power of the sensor component power supply, and based on the remaining power of the sensor component power supply, adjust the gas monitoring period and the wavelength monitoring range to ensure the continuity of the monitored greenhouse gas concentration data and the accuracy of gas concentration measurement. Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

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

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

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

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

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

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

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

[0042] Figure 9 Schematic diagram when the concentration of the target gas is higher than that of the sample gas in the relationship between wavelength and absorbance in an embodiment of the present application. Detailed implementation manners

[0043] The embodiments of the present application provide a greenhouse gas assessment method for environmental monitoring. Terms such as "first", "second", "third", "fourth", etc. (if any) in the specification, claims and the above-mentioned drawings of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the term "comprising" or "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0044] For ease of understanding, the specific process of the embodiments of the present application will be described below. Please refer to Figure 1 , an embodiment of a greenhouse gas assessment method for environmental monitoring in the embodiments of the present application includes:

[0045] Install a gas analyzer in the greenhouse. Refer to Figure 2 As shown, the gas analyzer includes a spectral 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: Configure a sample gas, and based on the first measurement result of the sample gas, establish a first relationship and a second relationship.

[0047] Specifically, when assessing greenhouse gases, the concentration of greenhouse gases in the directly measured environment may be interfered by various factors, such as the non-linear absorption characteristics of the gas, the interference of other gases, etc., which may lead to inaccurate measurement results. Therefore, by configuring a sample gas, first measure the absorbance of the sample gas, and then analyze the concentration of greenhouse gases in the monitored environment with reference to the absorbance of the sample gas. Suppose we want to evaluate the concentration of carbon dioxide in the greenhouse. Based on the above step S1, for example, configure a series of carbon dioxide sample gases with known concentrations, such as 100 ppm, 200 ppm, 500 ppm, and 800 ppm, etc. Use the gas analyzer 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 the 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 for absorbance will be described below. Based on the first measurement result, establish a first relationship, that is, the relationship between the wavelength corresponding to each concentration and the absorbance, and draw a relationship curve of wavelength and absorbance. Refer to Figure 4The relationship curve between the wavelength and the absorbance at a carbon dioxide concentration of 200 ppm as shown; a second relationship, i.e., the relationship between the concentration and the absorbance, is also established. For each wavelength, a relationship curve between the concentration and the absorbance is plotted. See Figure 5 The absorbances corresponding to different concentrations of carbon dioxide at a wavelength of 1550 nm as shown. Step S1 provides a reference basis for subsequent greenhouse gas assessments and ensures the accuracy of the monitoring results. In addition to carbon dioxide, this method is also applicable to monitoring other greenhouse gases in the greenhouse, such as methane, nitrous oxide, etc., and can also ensure the monitoring accuracy under different environmental conditions.

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

[0049] Specifically, in order to continuously and real-time monitor the gas concentration in the greenhouse and obtain the change of the 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 as shown, i.e., the second measurement result. The relationship between the wavelength and the absorbance of the target gas is established and used as the third relationship. See Figure 7 as shown. Through the monitoring of the preset period, the gas concentration in the greenhouse can be continuously obtained, which is convenient for timely discovering and dealing with abnormal situations of the gas concentration.

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

[0051] Specifically, the preset absorbance is set based on the maximum absorbance of the sample gas, and the specific setting will be described below. By setting the preset absorbance, a basis is provided for determining the wavelength monitoring range. 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, and combining the known concentration of the sample gas, the concentration of the target gas is calculated. Within the wavelength monitoring range, the absorbance decreases with the increase of the wavelength. Based on the relationship between the absorbance and the concentration within this wavelength monitoring range, the calculated concentration data of the target gas can be more accurate. The calculation method for 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 from the gas concentration obtained most recently at the target gas acquisition time, obtain and judge the remaining power of the sensor component power supply, and based on the remaining power of the sensor component power supply, adjust the gas monitoring period and the wavelength monitoring range.

[0053] Specifically, during the long-term monitoring of greenhouse gases according to a preset period, the remaining power of the power supply of the sensor component, such as a battery, will gradually decrease. The sensor may be deployed in an environment with space limitations and inconvenient charging, resulting in inability to charge in time. At this time, a method is needed to dynamically adjust the monitoring period to maintain continuous monitoring of the gas concentration. Through the above Step S4, the remaining power of the power supply of the sensor component can be effectively managed, the gas monitoring period can be optimized, and continuous and accurate monitoring of the gas concentration in the greenhouse can be ensured under different power supply states. By extending the monitoring period, the monitoring interruption caused by power exhaustion can be avoided. After adjusting the gas monitoring period, the wavelength monitoring range is also adjusted to make the measurement of the gas concentration more accurate.

[0054] Through the cooperation between the above steps, the present application can ensure the continuity of the concentration data of the monitored greenhouse gases and improve the accuracy of the gas concentration measurement, especially suitable for the monitoring of complex and changeable atmospheric environments.

[0055] Further, the above Step S1 further includes: preparing sample gases with multiple concentrations, using the light-emitting component of the gas analyzer to emit lights with different wavelengths to a container filled with the sample gas, calculating and recording the light absorbance of each concentration of the sample gas at each light wavelength as the first measurement result, and based on the first measurement result, establishing a first relationship between the wavelength of the light corresponding to the same concentration and the light absorbance of the sample gas, and a second relationship between the light absorbance of the sample gas corresponding to the same wavelength and the concentration of the sample gas. The first relationship describes the absorption of the sample gas with different concentrations at different wavelengths, and the second relationship describes the change of the light absorbance with the concentration at the same wavelength.

[0056] Specifically, referring to Figure 3 the first measurement result shown, for each concentration of the sample gas, draw a relationship curve between the wavelength and the light absorbance, referring to Figure 4 the relationship curve between the wavelength and the light absorbance of carbon dioxide with a concentration of 200 ppm shown, analyze the characteristics of the curve, and determine in which wavelength ranges the light absorbance decreases with the increase of the wavelength, and in which wavelength ranges the light absorbance increases or changes irregularly with the increase of the wavelength. For each wavelength, also draw a relationship curve between the light absorbance and the concentration at different concentrations, referring to Figure 5 the relationship curve between the light absorbance corresponding to different concentrations of carbon dioxide at a wavelength of 1550 nm shown.

[0057] Further, step S2 further includes: measuring and recording the absorbance of the target gas to light at each wavelength as the 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 the wavelength and the absorbance can be established as the third relationship, providing a calculation basis for calculating the concentration of the target gas. If other gases are monitored, the sample gas can be configured as the same type of gas as the monitored target gas when configuring the sample gas.

[0059] Further, setting the preset absorbance includes: based on the first relationship, obtaining the maximum absorbance among the absorbances 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 the measurement in practical applications, the absorbances of carbon dioxide at different wavelengths are obtained. Refer to Figure 4 the shown relationship curve, and find the maximum absorbance among the absorbances of the sample gas to light from Figure 4 it, that is, the first absorbance. For example, at a wavelength of 1530 nm, the maximum absorbance is 0.47. Then set the preset absorbance to 0.47. Setting the preset absorbance can effectively avoid the interference of the absorbance and the wavelength in the rapid rise region on the calculation of the gas concentration, improve the accuracy of the concentration measurement, and at the same time provide a basis for determining and adjusting the wavelength monitoring range.

[0061] Further, determining the wavelength monitoring range includes:

[0062] Based on the preset absorbance, obtaining multiple target wavelengths at which the absorbance at each wavelength is less than or equal to the preset absorbance from the third relationship, taking the smallest wavelength among the target wavelengths as the starting wavelength of the wavelength monitoring range, and taking the largest wavelength among the target wavelengths as the ending wavelength of the wavelength monitoring range.

[0063] Specifically, from the third relationship, filter out the wavelength monitoring ranges where the absorbances of the target gas to light are all less than or equal to the preset absorbance. From Figure 7It can be seen that in the wavelength range of 1550 nm to 1600 nm, the absorbance is less than 0.47. From the selected target wavelengths, find the smallest wavelength. For example, in the wavelength range of 1550 nm to 1600 nm, the smallest wavelength is 1550 nm. From the selected target wavelengths, find the largest wavelength. For example, in the wavelength range of 1550 nm to 1600 nm, the largest wavelength is 1600 nm. Outside the wavelength range of 1550 nm to 1600 nm, the absorbance will increase rapidly, and the relationship between the wavelength and the absorbance is abnormal. To ensure the accuracy of the measurement quantity, select the wavelength in the range of 1550 nm to 1600 nm as the wavelength monitoring range, so that the calculation result of the gas concentration is more accurate.

[0064] Further, adjusting the wavelength monitoring range includes: taking the maximum absorbance in the third relationship as the second absorbance. If the second absorbance is less than the preset absorbance, obtain the wavelength corresponding to the second absorbance as the starting wavelength of the wavelength monitoring range, and the largest wavelength in the second measurement result as the ending wavelength of the wavelength monitoring range; if the second absorbance is greater than or equal to the preset absorbance, obtain the wavelength corresponding to the preset absorbance as the starting wavelength of the wavelength monitoring range, and the largest wavelength in the second measurement result as the ending wavelength of the wavelength monitoring range. Among them, taking the maximum absorbance in the third relationship as the second absorbance means 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, and equipment needs to be replaced when exceeding the concentration range. Through the above method, this application adjusts the wavelength monitoring range to adapt to a wider range of gas concentration measurements. For example, when monitoring the concentration of carbon dioxide in a greenhouse, refer to Figure 8 As shown, when the concentration of carbon dioxide in the greenhouse is lower than the concentration of the sample gas, obtain the maximum absorbance of carbon dioxide at different wavelengths, that is, the second absorbance mentioned above. In the wavelength range of 1500 nm to 1600 nm, the second absorbance is 0.4, and the wavelength corresponding to the second absorbance is 1530 nm. Then, set the wavelength monitoring range from 1530 nm to 1600 nm, because within this range, the absorbance decreases with the increase of the wavelength, and the calculated gas concentration is more accurate.

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

[0067] Further, 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 within the wavelength monitoring interval, calculating the average value of the ratios of the absorbance of the target gas to light to the absorbance of the sample gas to light at each wavelength; based on the average value, calculating the concentration of the target gas, where 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 the target gas being lower than that of the sample gas as a reference, calculate multiple ratios 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 interval of 1530 nm to 1600 nm, 0.4 / 0.47 = 0.851, 0.2 / 0.3 = 0.667,..., 0.038 / 0.038 = 1, and then calculate the average value of the multiple ratios equal to 0.886. Then, obtain the concentration corresponding to the absorbance of the sample gas to light from the second relationship as 200 ppm, and the concentration of the target gas = 200 * 0.886 = 177.2 ppm.

[0069] Further, the above 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 gas obtained most recently from the time of obtaining the target gas is decreasing, then extend the period of the gas analyzer for monitoring the gas in the greenhouse, and if the concentration of the gas obtained most recently from the time of obtaining the target gas is increasing, then shorten the period of the gas analyzer for monitoring the gas in the greenhouse. To reduce the monitoring frequency and the power consumption, so as to ensure the continuity of gas monitoring even when the power is insufficient.

[0070] Further, if the period for the gas analyzer to monitor the gas in the greenhouse is extended, when measuring the current target gas concentration, based on the wavelength monitoring range corresponding to the gas concentration obtained most recently, increase the starting wavelength of the wavelength monitoring range by an increment equal to one adjacent wavelength, so that the wavelength monitoring range becomes smaller, thereby improving the accuracy of gas concentration measurement; if the period for the gas analyzer to monitor the gas in the greenhouse is shortened, when measuring the current target gas concentration, based on the wavelength monitoring range corresponding to the gas concentration obtained most recently, decrease the starting wavelength of the wavelength monitoring range by an increment equal to one adjacent wavelength, so that the wavelength monitoring range becomes larger, and the measurable gas concentration range is wider. By increasing or decreasing the wavelength monitoring range, the result of measuring the gas concentration is more accurate.

[0071] Further, calculate the absorbance of the sample gas at each concentration at each wavelength of light, including: through the formula calculate the absorbance of the sample gas at each wavelength of light, where f represents the absorbance of the sample gas at the light, and q 0 represents the incident intensity of the light, and q 1 represents the intensity of the light after passing through the sample gas.

[0072] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described system, system, and unit can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[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 such an understanding, the technical solution of the present application, in essence, 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. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

[0074] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate 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; Step S2: Based on a preset period, using a gas analyzer to monitor the target gas in the greenhouse, and establishing a third relationship based on a second measurement result of the target 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; 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 The step S1 further comprises: 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 light 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 light of the sample gas, and a second relationship between the absorbance of light of the sample gas corresponding to the same wavelength and the concentration of the sample gas.

3. The method according to claim 1, characterized in that The step S2 further comprises: 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.

4. The method according to claim 1, characterized in that: Setting a preset absorbance includes: 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.

5. The method according to claim 1, characterized in that: Determine the wavelength monitoring interval including: 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.

6. 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, 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 largest wavelength in the second measurement result is used as the ending wavelength of the wavelength monitoring interval.

7. The method according to claim 1, characterized in that Calculation of the target gas concentration includes: Based on the second relationship, the concentration corresponding to the absorbance of the sample gas is obtained, the first relationship and the third relationship are compared, and within the wavelength monitoring interval, the average value of the ratio of the absorbance of the target gas to light to the absorbance of the sample gas to light is calculated; based on the average value, the concentration of the target gas is calculated, 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.

8. The method according to claim 1, characterized in that The step S4 further comprises: 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 last gas concentration 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 last gas concentration obtained at the target gas acquisition time, the period of the gas analyzer monitoring the gas in the greenhouse is shortened.

9. The method according to claim 8, characterized in that The step S4 further comprises: 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.

10. The method according to claim 2, characterized in that Calculate the absorbance of the sample gas at each concentration at each wavelength of light, including: 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.

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