Equivalent calculation method for cold wave meteorological temperature, product cold wave temperature test system and storage medium

Abstract

The invention discloses a cold wave meteorological temperature equivalent calculation method and a product cold wave temperature test system, the method comprises collecting historical cold wave meteorological temperature data, establishing a functional relationship between temperature and time according to the cold wave meteorological temperature data, obtaining the temperature cumulative effect value in each cold wave time period according to the functional relationship, determining an equivalent temperature curve, calculating the cold wave temperature cumulative effect mean value equivalent to the lowest temperature of the equivalent temperature curve, equating the cumulative effect value of the equivalent temperature curve in time with the mean value of the cold wave temperature cumulative effect value, thereby obtaining the lowest temperature duration of the equivalent temperature curve, and finally determining the equivalent temperature curve. The method effectively solves the problems of difficulty and time of temperature loading test according to the actual cold wave meteorological temperature in the test scene, effectively shortens the test time, and makes the result more in line with reality.

Description

Technical Field

[0001] The invention belongs to the field of meteorological data processing and testing, and specifically relates to a cold wave meteorological temperature equivalent calculation method, a product cold wave temperature testing system and a storage medium. Background Art

[0002] Cold wave is an extreme meteorological phenomenon, usually accompanied by extremely low temperatures and short duration. Such severe weather conditions can have a negative impact on various products and equipment, causing their performance to deteriorate or even be damaged. In order to deeply study the impact of cold wave disasters on products, it is crucial to conduct cold wave resistance tests. The purpose of these tests is to evaluate the performance of products under cold wave conditions to ensure that they have sufficient reliability and safety.

[0003] However, the existing testing technology methods do not have a temperature equivalent method specifically for cold wave weather, which can be used as a laboratory cold wave resistance testing method for products. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a cold wave meteorological temperature equivalent calculation method, a product cold wave temperature testing system and a storage medium, which solves the problem of difficulty and time in conducting temperature loading tests according to actual cold wave temperatures in test scenarios in the prior art.

[0005] The present invention adopts the following technical solutions to solve the above technical problems:

[0006] A method for calculating the equivalent temperature of cold wave meteorology comprises the following steps:

[0007] Step 1, collect historical meteorological data and extract cold wave meteorological temperature data;

[0008] Step 2, establish a functional relationship between temperature and time, and obtain the cumulative temperature effect value in each cold wave period according to the functional relationship;

[0009] Step 3, determine the lowest temperature of the equivalent temperature curve, and calculate the mean value of the cumulative effect of the cold wave temperature equivalent to the lowest temperature;

[0010] Step 4: Take the mean value of the cumulative effect of the cold wave temperature as the cumulative effect value of the equivalent temperature curve in time, obtain the minimum temperature duration of the equivalent temperature curve, and determine the equivalent temperature curve.

[0011] In step 1, the specific steps for extracting cold wave meteorological temperature data are as follows:

[0012] Step 1.1, collect historical meteorological data information, including temperature data and corresponding time;

[0013] Step 1.2, search for time nodes that meet the definition of cold waves in historical temperature data, and determine the start and end time of each cold wave;

[0014] Step 1.3: According to the start and end time of each cold wave, intercept the cold wave meteorological temperature data.

[0015] In step 2, the functional relationship between temperature and time is established. The specific steps for obtaining the temperature cumulative effect value in each cold wave period according to the functional relationship are as follows:

[0016] Step 2.1, assuming that the temperature change between two adjacent temperature data in the meteorological temperature data is a linear relationship, that is, linear interpolation is used to determine the temperature value between two adjacent points, and finally the temperature curve during the cold wave is obtained;

[0017] Step 2.2: Integrate the temperature curve during the cold wave over time, calculate the area enclosed by the temperature curve below 0°C during the cold wave and 0°C, and obtain the cumulative effect value of the cold wave temperature.

[0018] In step 3, the specific steps for determining the minimum temperature of the equivalent temperature curve and calculating the mean value of the cumulative effect of the cold wave temperature equivalent to the minimum temperature are as follows:

[0019] Step 3.1, according to the distribution of initial temperature at the beginning of the cold wave, determine the initial temperature and the end temperature in the equivalent temperature curve, and determine the rate parameters of temperature drop and rise in the equivalent temperature curve;

[0020] Step 3.2: Determine the lowest cold wave temperature required to resist the cold wave in the test as the lowest temperature of the equivalent temperature curve.

[0021] Step 3.3: Calculate the mean of the cumulative effect values ​​of all cold wave temperatures.

[0022] In step 4, the mean value of the cumulative effect of the cold wave temperature is used as the cumulative effect value of the equivalent temperature curve in time to obtain the minimum temperature duration of the equivalent temperature curve. The specific steps for determining the equivalent temperature curve are as follows:

[0023] Step 4.1, after determining the initial temperature, end temperature and temperature drop and rise rate of the equivalent temperature curve, take the minimum temperature duration as an unknown variable to determine the equivalent temperature curve;

[0024] Step 4.2, integrate the equivalent temperature curve over time, and calculate the cumulative effect value of the equivalent temperature curve below 0°C;

[0025] Step 4.3: Under the condition that the cumulative effect value of the equivalent temperature curve is equal to the mean of the cumulative effect value of the cold wave temperature, calculate the minimum temperature duration of the equivalent temperature curve to obtain the final form of the equivalent temperature curve.

[0026] The cumulative effect value of cold wave temperature is calculated according to the following formula:

[0027]

[0028] In the formula, is the cumulative effect value of cold wave temperature, This is the temperature curve during the cold wave.

[0029] Cumulative effect value of equivalent temperature curve The specific calculation formula is as follows:

[0030]

[0031] is the absolute value of the lowest temperature of the equivalent temperature curve, and are the temperature rise and fall rates of the equivalent temperature curve, The duration of the lowest temperature.

[0032] Cumulative effect value of equivalent temperature curve The mean of the cumulative effect value of cold wave temperature The minimum temperature duration of the equivalent temperature curve is calculated based on the condition of equality. The specific calculation formula is as follows:

[0033]

[0034] In the formula, is the number of cold waves, Cumulative effect value for each cold wave temperature.

[0035] A product cold wave temperature testing system comprises a product testing device, wherein the product testing device adjusts the temperature according to a historical cold wave equivalent temperature curve to perform a cold wave temperature test on the product.

[0036] A computer-readable storage medium stores computer-readable instructions, which, when executed by a processor, call all or part of the steps of the method.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The equivalent method provided by the present invention is based on historical cold wave meteorological temperature data. The average value of the temperature cumulative effect obtained by integrating the cold wave temperature over time is equivalent to the temperature integral of the equivalent temperature curve, thereby obtaining the loading time of the equivalent temperature curve, filling the gap in the equivalent calculation of cold wave temperature.

[0039] 2. The temperature equivalent calculation method provided by the present invention solves the technical problem of inconvenient loading in variable temperature tests, can effectively accelerate the temperature test process, help reduce the difficulty of cold wave temperature tests, and improve test efficiency.

[0040] 3. The temperature equivalence method is often used to convert and compare experimental results under different temperature conditions, thereby saving time and resources. This method can provide significant benefits, especially when large-scale experiments need to be conducted under multiple temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The present invention is a flow chart of the cold wave meteorological temperature equivalent calculation method.

[0042] Figure 2 This is a historical temperature data diagram of the area in the embodiment of the present invention.

[0043] Figure 3 This is an example diagram of the temperature of a cold wave in the area of ​​the embodiment of the present invention.

[0044] Figure 4 It is an equivalent temperature curve diagram of the area of ​​the embodiment of the present invention.

[0045] Figure 5 It is a schematic diagram of the specific calculation process of the cumulative effect value of the equivalent temperature curve of the present invention. DETAILED DESCRIPTION

[0046] The structure and working process of the present invention will be further described below in conjunction with the accompanying drawings.

[0047] Temperature equivalence methods are often used to convert and compare experimental results under different temperature conditions, thus saving time and resources. This method can provide significant benefits, especially when large-scale experiments under multiple temperature conditions are required.

[0048] Considering the particularity of cold waves, we need a new temperature equivalent method suitable for cold wave tests. This will help to more effectively evaluate the performance of products under different cold wave conditions, improve research efficiency, and reduce experimental costs. By researching and developing a temperature equivalent method suitable for cold wave tests, we can better understand the impact of cold waves on products, ensure that products can still operate reliably under extreme meteorological conditions, and reduce unnecessary losses and risks.

[0049] A method for calculating the equivalent temperature of cold wave meteorology comprises the following steps:

[0050] Step 1, collect historical meteorological data and extract cold wave meteorological temperature data;

[0051] Step 2, establish a functional relationship between temperature and time, and obtain the cumulative temperature effect value in each cold wave period according to the functional relationship;

[0052] Step 3, determine the lowest temperature of the equivalent temperature curve, and calculate the mean value of the cumulative effect of the cold wave temperature equivalent to the lowest temperature;

[0053] Step 4: Take the mean value of the cumulative effect of the cold wave temperature as the cumulative effect value of the equivalent temperature curve in time, obtain the minimum temperature duration of the equivalent temperature curve, and determine the equivalent temperature curve.

[0054] Specific embodiments, such as Figures 1 to 5 As shown,

[0055] A method for calculating a cold wave temperature equivalent temperature curve comprises the following steps:

[0056] Step 1: Collect historical meteorological data and extract cold wave meteorological temperature data.

[0057] Further, the step 1 includes the following sub-steps:

[0058] Step 1.1, collect historical meteorological data information, including temperature data and corresponding time, such as Figure 2 shown.

[0059] Step 1.2: According to the requirements of Section 3.3 of the national standard GBT 21987-2017 Cold Wave Level, search for time nodes that meet the definition of cold waves in historical temperature data and determine the start time of each cold wave; the specific determination method is as follows:

[0060] The start date of a cold wave can be determined based on the definition of a cold wave. The standard "GBT21987-2017 Cold Wave Level" stipulates that a cold wave is defined as "cold air activity that causes the daily minimum temperature in a certain place to drop by ≥8°C within 24 hours, or ≥10°C within 48 hours, or ≥12°C within 72 hours, and causes the daily minimum temperature in the area to ≤4°C."

[0061] Calculate the daily minimum temperature for each day in the historical temperature, and find out whether the daily minimum temperature of a certain day meets the following conditions:

[0062] 1. The daily minimum temperature drops by ≥8°C within 24 hours;

[0063] 2. The daily minimum temperature drops by ≥10℃ within 48 hours;

[0064] 3. The daily minimum temperature drops by ≥12°C within 72 hours;

[0065] If the daily minimum temperature on a certain day meets this condition, and the daily minimum temperature is ≤4℃ during the subsequent cooling process, this day is considered to be the starting day of the cold wave. For example, the daily minimum temperature on the mth day is 10℃, and the daily minimum temperature on the m+1th day is 0℃, which meets the requirement that the daily minimum temperature drops by ≥8℃ within 24 hours, and also meets the requirement that the daily minimum temperature is ≤4℃, that is, the mth day is considered to be the starting day of the cold wave.

[0066] Determine the end time of the cold wave, and define the end time of the cold wave as the time when the daily minimum temperature is higher than that of the previous day and the daily minimum temperature is greater than 4°C.

[0067] Step 1.3, according to the start and end time of each cold wave, intercept the cold wave meteorological temperature data, where the cold wave meteorological temperature data is as follows: Figure 3 shown.

[0068] Step 2: Establish a functional relationship between temperature and time, and obtain the cumulative temperature effect value during each cold wave period based on the functional relationship.

[0069] Further, the step 2 includes the following sub-steps:

[0070] Step 2.1, assuming that the temperature change between two adjacent temperature data in the meteorological temperature data is a linear relationship, that is, linear interpolation is used to determine the temperature value between two adjacent points, and finally the temperature curve during the cold wave is obtained as follows:

[0071]

[0072] Where: is the linear interpolation function between every two adjacent points, expressed as:

[0073]

[0074] is an indicator function, expressed as:

[0075]

[0076] , , , are the time and temperature of two adjacent monitoring points, An integer greater than 0.

[0077] Step 2.2, integrate the temperature curve during the cold wave over time, and calculate the area between the temperature curve below 0℃ during the cold wave and 0℃, that is, the cumulative effect value of the cold wave temperature. The specific calculation formula is as follows:

[0078]

[0079] In the formula, is the cumulative effect value of cold wave temperature, is the temperature curve during the cold wave. The obtained cumulative effect value of cold wave temperature is shown in Table 1.

[0080] Table 1: Partial cold wave information table of the embodiment area:

[0081]

[0082] Step 3: Determine the lowest temperature of the equivalent temperature curve and calculate the mean cumulative effect of the cold wave temperature equivalent to the lowest temperature.

[0083] Further, the step 3 includes the following sub-steps:

[0084] Step 3.1, according to the distribution of initial temperature at the beginning of the cold wave, determine the initial temperature and end temperature in the equivalent temperature curve to be 10°C. According to the temperature loading capacity of the test equipment, determine the temperature drop rate in the equivalent temperature curve to be 3°C / h and the temperature rise rate to be 2°C / h.

[0085] Step 3.2, determine the lowest cold wave temperature required to resist the cold wave in the test, and set -5℃ as the lowest temperature of the equivalent temperature curve.

[0086] Step 3.3, calculate the mean of the cumulative effect values ​​of these cold wave temperatures.

[0087]

[0088] In the formula, is the mean of the cumulative effect value of cold wave temperature, is the number of cold waves, The cumulative effect value of temperature for each cold wave.

[0089] Among all the cold waves, the ones with the lowest temperature equivalent to the lowest temperature of the equivalent temperature curve, that is, the cold waves with the lowest temperature equivalent to -5℃, totaled 141 times, and the final average of the cumulative effect value of the cold wave temperature was 34.7.

[0090] Step 4: Take the mean value of the cumulative effect of the cold wave temperature as the cumulative effect value of the equivalent temperature curve in time, obtain the minimum temperature duration of the equivalent temperature curve, and determine the equivalent temperature curve.

[0091] Further, the step 4 includes the following sub-steps:

[0092] Step 4.1: In step 3, the initial temperature, end temperature and temperature drop rate of the equivalent temperature curve have been determined. The duration of the lowest temperature is taken as an unknown variable. , determine the equivalent temperature curve.

[0093] Step 4.2, integrate the equivalent temperature curve over time, calculate the area of ​​the equivalent temperature curve below 0℃, that is, the cumulative effect value of the equivalent temperature curve, and use It is actually the expression of the area enclosed by the equivalent temperature curve and 0℃, which can be regarded as an integral of the curve. The calculation process is as follows Figure 5 As shown, It is from 0℃ to The time required is also From The time required to heat up to 0°C. The final specific calculation formula is as follows:

[0094]

[0095] In the formula, is the absolute value of the lowest temperature of the equivalent temperature curve, and are the temperature rise and fall rates of the equivalent temperature curve, respectively, and both the temperature rise and fall rates are positive values. The duration of the lowest temperature.

[0096] Step 4.3, using the cumulative effect value of the equivalent temperature curve The mean of the cumulative effect value of cold wave temperature As the condition of equality, find the minimum temperature duration of the equivalent temperature curve, that is, , based on the determined temperature rate and minimum temperature, calculate The parameters of the final form of the equivalent temperature curve are shown in Table 2.

[0097] Table 2 Parameters of the final form of the equivalent temperature curve:

[0098]

[0099] Finally, the parameters of the final form of the equivalent temperature curve are implemented in Figure 4 hour, Figure 4 The indicators are shown in Table 3, assuming that there is a 30-minute stabilization time before the curve starts.

[0100] Table 3 Figure 4 Parameter table of the final form of the equivalent temperature curve:

[0101]

[0102] The present invention proposes a method for calculating the equivalent temperature curve of cold wave temperature, which equates the average value of the temperature cumulative effect obtained by integrating the cold wave temperature over time to the temperature integral of the equivalent temperature curve, thereby obtaining the loading time of the equivalent temperature curve, filling the gap in the equivalent calculation of cold wave temperature. At the same time, it solves the technical problem that it is inconvenient to load using a variable temperature test, can effectively accelerate the temperature test process, help reduce the difficulty of cold wave temperature tests, and improve test efficiency.

[0103] Based on the above-mentioned temperature equivalent curve calculation method, the present solution also provides a product cold wave temperature testing system, including a product testing device, which adjusts the temperature according to the historical cold wave equivalent temperature curve to perform a cold wave temperature test on the product.

[0104] This method can be applied to any product that needs to be tested for cold wave. The obtained cold wave equivalent temperature curve is used as a benchmark to apply the corresponding temperature to the product for testing. It effectively solves the problems of difficulty and time in performing temperature loading tests according to actual cold wave temperatures in test scenarios, effectively shortens the test time, and makes the results more realistic.

[0105] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0106] A computer-readable storage medium stores computer-readable instructions, which, when executed by a processor, call all or part of the steps of the method.

[0107] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the 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, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0108] Those skilled in the art should understand that they can implement variations by combining the prior art and the above embodiments. Such variations do not affect the essence of the present solution and are not described in detail here.

[0109] It should be understood that the present solution is not limited to the above-mentioned specific implementation methods, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present solution without departing from the scope of the technical solution of the present solution, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essential content of the present solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present solution without departing from the content of the technical solution of the present solution still falls within the scope of protection of the technical solution of the present solution.

Claims

1. A method for calculating equivalent temperature of cold wave meteorological conditions, characterized in that: The steps include: Step 1, collect historical meteorological data and extract cold wave meteorological temperature data; Step 2, establish a functional relationship between temperature and time, and obtain the cumulative temperature effect value in each cold wave period according to the functional relationship; Step 3, determining the lowest temperature of the equivalent temperature curve, and calculating the mean value of the cumulative effect of the cold wave temperature equivalent to the lowest temperature; specifically comprising the following steps: Step 3.1, according to the distribution of initial temperature at the beginning of the cold wave, determine the initial temperature and the end temperature in the equivalent temperature curve, and determine the rate parameters of temperature drop and rise in the equivalent temperature curve; Step 3.2, determine the lowest cold wave temperature required to resist the cold wave in the test as the lowest temperature of the equivalent temperature curve; Step 3.3, calculate the mean of all the cumulative effect values ​​of cold wave temperatures; Step 4, taking the mean value of the cumulative effect of the cold wave temperature as the cumulative effect value of the equivalent temperature curve in time, obtaining the minimum temperature duration of the equivalent temperature curve, and determining the equivalent temperature curve, specifically includes the following steps: Step 4.1, after determining the initial temperature, end temperature and temperature drop and rise rate of the equivalent temperature curve, take the minimum temperature duration as an unknown variable to determine the equivalent temperature curve; Step 4.2, integrate the equivalent temperature curve over time, and calculate the cumulative effect value of the equivalent temperature curve below 0°C; Step 4.3: Under the condition that the cumulative effect value of the equivalent temperature curve is equal to the mean of the cumulative effect value of the cold wave temperature, calculate the minimum temperature duration of the equivalent temperature curve to obtain the final form of the equivalent temperature curve.

2. The method for calculating the equivalent temperature of cold wave meteorology according to claim 1 is characterized in that: In step 1, the specific steps for extracting cold wave meteorological temperature data are as follows: Step 1.1, collect historical meteorological data information, including temperature data and corresponding time; Step 1.2, search for time nodes that meet the definition of cold waves in historical temperature data, and determine the start and end time of each cold wave; Step 1.3: According to the start and end time of each cold wave, intercept the cold wave meteorological temperature data.

3. The cold wave meteorological temperature equivalent calculation method according to claim 1 is characterized in that: In step 2, the functional relationship between temperature and time is established. The specific steps for obtaining the temperature cumulative effect value in each cold wave period according to the functional relationship are as follows: Step 2.1, assuming that the temperature change between two adjacent temperature data in the meteorological temperature data is a linear relationship, that is, linear interpolation is used to determine the temperature value between two adjacent points, and finally the temperature curve during the cold wave is obtained; Step 2.2: Integrate the temperature curve during the cold wave over time, calculate the area enclosed by the temperature curve below 0°C during the cold wave and 0°C, and obtain the cumulative effect value of the cold wave temperature.

4. The method for calculating the equivalent temperature of cold wave meteorology according to claim 1 is characterized in that: The cumulative effect value of cold wave temperature is calculated according to the following formula: ， In the formula, is the cumulative effect value of cold wave temperature, This is the temperature curve during the cold wave.

5. The method for calculating the equivalent temperature of cold wave weather according to claim 4 is characterized in that: Cumulative effect value of equivalent temperature curve The specific calculation formula is as follows: ， is the lowest temperature value of the equivalent temperature curve, and are the temperature rise and fall rates of the equivalent temperature curve, The duration of the lowest temperature.

6. The method for calculating the equivalent temperature of cold wave meteorology according to claim 4 is characterized in that: Cumulative effect value of equivalent temperature curve The mean of the cumulative effect value of cold wave temperature The minimum temperature duration of the equivalent temperature curve is calculated based on the condition of equality. The specific calculation formula is as follows: ， In the formula, is the number of cold waves, The cumulative effect value of temperature for each cold wave.

7. A product cold wave temperature testing system based on the method according to any one of claims 1 to 6, characterized in that: It includes a product testing device, which adjusts the temperature according to a historical cold wave equivalent temperature curve to perform a cold wave temperature test on the product.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-readable instructions, and when the computer-readable instructions are executed by a processor, all or part of the steps of the method described in any one of claims 1 to 6 are called.

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