CN114815935B - Environment test condition cutting method and environment test control system - Google Patents
Environment test condition cutting method and environment test control system Download PDFInfo
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Abstract
The invention provides an environmental test condition cutting method and an environmental test control system, comprising the following steps: determining test environmental factors according to equipment service areas; combining the determined experimental environment factors to obtain corresponding environment equivalent and environment equivalent level; obtaining an environmental equivalent conversion coefficient; acquiring the service time length of environmental test times of each environmental section of the equipment; the environmental test control system adopts the clipping method. By adopting the scheme of the invention, after the environmental test is carried out in one typical area, the related test results of other areas can be rapidly given, the newly developed equipment used for a plurality of areas can be rapidly subjected to test evaluation, and standard tests are not required to be carried out in each area like the traditional mode, thereby greatly saving test cost and test time, and the invention belongs to the field of changing the existing 'point-to-point test mode' into the 'point-to-face test mode'.
Description
Technical Field
The invention belongs to the technical field of environmental tests, and particularly relates to an environmental test condition cutting method based on equipment environmental profile and environmental equivalent analysis, and an environmental test control system adopting the cutting method.
Background
The tailoring involved in conducting environmental tests on equipment or its components/materials is a process of selecting or changing test procedures, test conditions, test magnitudes, with the purpose of helping to ensure that the equipment will not over-design and under-design, over-test and under-test in the particular environmental aspects expected to be encountered during its lifetime, so that a given piece of equipment will be manufactured and tested to operate reliably under the influence of the various environmental factors and magnitudes experienced throughout its lifetime.
At present, the cutting of the rapid environmental test conditions is mainly based on extreme values and measured values to develop environmental stress selection. The test stress of the former is biased to the extremum, but the equipment is not always used or stored under the extremum condition, the test strength of the extremum is larger than the actual service difference, the product needs to meet higher environmental strength, and the development side increases extra cost; the latter needs a large amount of measured data, and for new products, the most missing is measured data, only a small amount of measured data exists in the initial stage or the prototype stage, and the small amount of measured data cannot represent generality, so that the latter method has a certain defect in the logic level during the development test of the new product. More critically, new developed equipment for multiple areas cannot be quickly experimentally evaluated using existing methods.
The prior document CN113933086B provides a method for cutting and optimizing the test conditions of the whole low-temperature environment of an aircraft in a laboratory, which comprises the following steps: quantitative analysis of performance of a key motion mechanism of an airplane; cutting under low-temperature environmental test conditions; quantitative measurement of the performance of a key motion mechanism of an airplane in a low-temperature environment; correction of cutting temperature data; determining cold soaking time of the aircraft after the hair is stopped; optimizing the test spectrum of the low-temperature environment test conditions of the whole aircraft in the laboratory. However, the scheme is only optimized for cutting the low-temperature environment test conditions of the whole aircraft, and cannot quantitatively represent the environment equivalent faced in the service life of equipment and accurately determine the environment test conditions.
Disclosure of Invention
The invention aims to provide an environmental test condition cutting method based on equipment environmental profile and environmental equivalent analysis, which not only can quantitatively represent environmental equivalent faced in equipment life and accurately determine environmental test conditions, but also overcomes the defects of two methods (extremum and actual measurement), can obtain the damage effect of the equipment under a selected environment, and can assist in judging similar environments of a tested product with an equivalent relation and has adaptability under different value levels.
In order to achieve the above object, the present invention adopts the following technical scheme.
An environmental test condition clipping method based on equipment environmental profile and environmental equivalent analysis comprises the following steps:
step 1, determining test environment factors according to equipment service areas;
step 2, combining the determined experimental environmental factors to obtain corresponding environmental equivalent and environmental equivalent level;
step 3, obtaining the conversion coefficient of the environmental equivalent according to the formula (I),
wherein F represents an environmental equivalent conversion coefficient; w (W) i An environmental equivalent representing environmental factors of each environmental profile of the equipment; w (W) max The maximum value is represented, and the environment equivalent of a reference environment factor is usually selected;
step 4, according to formula (III)
K＝1/F……………………………(Ⅲ)
And obtaining the service length K of the environmental test times of the equipment in each environmental section.
Further, the method also comprises the steps of 5 and 6:
step 5, obtaining the total equivalent of the test environment of the equipment according to the formula (II),
W＝L×I×F×(1+E)………………………………(Ⅱ)
wherein: w represents the total equivalent of the test environment of the equipment; t represents the length of time (typically in years) the equipment is to experience the environment; i represents an environmental equivalent reference value of an equipment service area; f represents an environmental equivalent conversion coefficient; e represents an expansion coefficient, and usually takes the value of the year and the relative standard deviation of the average value of the year to be high, and E takes 0.10 in general;
and 6, establishing an equipment test environment recommendation table by combining the environment equivalent conversion coefficient and the test environment total equivalent, and determining an acceleration test condition according to the test environment total equivalent.
Preferably, the environmental equivalent conversion coefficient comprises a storage accumulated temperature environmental equivalent conversion coefficient divided by geographic areas, a temperature-humidity coupling environmental equivalent conversion coefficient divided by geographic areas, a humidity-heat coupling environmental equivalent conversion coefficient divided by environmental types, an atmospheric temperature-solar irradiation environmental equivalent conversion coefficient divided by geographic areas and an atmospheric temperature-solar irradiation equivalent conversion coefficient divided by environmental types.
Another object of the present invention is to provide an environmental test control system capable of quickly and accurately determining environmental test conditions, including a memory, a processor, and a program stored on the memory and executable on the processor; the method is characterized in that:
the program comprises an operable test environment factor data module, an environment equivalent and conversion coefficient data module, a calculation module, an input module and an output module;
the test environment factor data module comprises readable and callable contents in a table 1;
TABLE 1 environmental factors for testing
The environment equivalent and conversion coefficient data module thereof comprises readable and callable contents in tables 2 to 6;
TABLE 2 stored thermal environment equivalents and conversion factors for geographical regions
TABLE 3 temperature and humidity coupled environment equivalents and conversion coefficients thereof divided by geographical region
TABLE 4 damp-heat coupling environmental equivalent and conversion coefficient thereof divided by environmental type
TABLE 5 atmospheric temperature-environmental equivalents of solar radiation divided by geographical region and conversion coefficient thereof
TABLE 6 atmospheric temperature-solar irradiation equivalent and conversion coefficient thereof are divided by environmental type
Wherein, the calculation module is used for calculating the total equivalent of the test environment according to the formula (II),
W＝L×I×F×(1+E)………………………………(Ⅱ)
wherein: w represents the total equivalent of the test environment of the equipment; t represents the length of time the equipment is to experience the environment; i represents an environmental equivalent reference value of an equipment service area; f represents an environmental equivalent conversion coefficient; e represents an expansion coefficient, and usually takes the value of the year and the relative standard deviation of the average value of the year to be high, and E takes 0.10 in general;
then calculating an acceleration test condition according to the total equivalent of the obtained test environment;
the input module is used for inputting or selecting the category, application scene and time length of the equipment to be tested or the parts/materials thereof; the output module is used for outputting a device test environment recommendation table and acceleration test conditions;
the processor, when executing the program, performs the steps of:
step 1, a memory reads the category, application scene and time length of equipment or parts/materials thereof selected by an input module to be subjected to the environment of an equipment service area, and matches the read information with related data stored on the memory;
step 2, calling the matched related data, calculating the total equivalent weight W of the test environment according to the formula (II), calculating the acceleration test condition according to the obtained total equivalent weight of the test environment, calculating the doubling time K according to the formula (III),
K＝1/F……………………………(Ⅲ)
wherein: f represents an environmental equivalent conversion coefficient;
step 3: generating an environment test recommendation table according to the matched related data and the obtained total equivalent of the test environment and the test conditions;
step 4: and the processor displays the matched related data, the calculated total equivalent of the test environment, the accelerated test conditions and the environment test recommendation table through a human-computer interaction interface.
Further, in step 3: matching the matched environmental equivalent conversion coefficient F with corresponding information in the table 7, and marking a recommended item;
TABLE 7 environmental test recommendation table
The beneficial effects are that: the invention provides the steps of environmental profile and environmental equivalent analysis of the equipment environmental test, designs a complete process, cuts the environmental conditions of the equipment environmental test based on the equipment environmental profile and the environmental equivalent analysis, objectively reflects the types of main environmental factors in the equipment environmental profile during the service life, quantitatively characterizes the environmental equivalents faced in the equipment service life, is beneficial to quickly selecting and determining (cutting) the proper environmental stress types and the proper environmental stress equivalent levels, designs the equipment environmental test conditions more scientifically and reasonably, improves the equipment environmental damage evaluation and service life evaluation accuracy, effectively shortens the test time, and is suitable for the equipment and product environmental adaptability assessment.
According to the invention, the environment is quantized, a fixed quantization algorithm is used for calculating the characteristic attribute value of one type of environment factor value or combination of multiple types of environment factors, equivalent normalization comparison is carried out on the environments of the same type, the level of the environmental stress or the combined stress of the environment in various environments can be quantitatively described by utilizing the value, and the interval from the general level to the extreme value level is covered. Before the equipment environment test is carried out, a user can select proper stress level for new products to carry out test and examination according to the self environment adaptability requirement, and the stress level with deviation is not only an extreme value level or is determined by a small amount of measured values; the invention overcomes the defects of two methods (extreme value and actual measurement), can obtain the damage effect of the test object under the selected environment, and can assist in judging the adaptability of the similar environments of the test object under different quantity levels in equivalent relation.
By adopting the scheme of the invention, after the environmental test is carried out in one typical area, the related test results of other areas can be rapidly given, the newly developed equipment used for a plurality of areas can be rapidly subjected to test evaluation, and standard tests are not required to be carried out in each area like the traditional mode, thereby greatly saving test cost and test time, and the invention belongs to the field of changing the existing 'point-to-point test mode' into the 'point-to-face test mode'.
Detailed Description
The present invention is further illustrated below with reference to the following examples, which are provided to aid in understanding the principles of the present invention and its core ideas, but are not intended to limit the scope of the present invention. It should be noted that modifications to the present invention without departing from the principles of the invention would be obvious to one of ordinary skill in this art and would fall within the scope of the invention as defined in the appended claims.
Example 1
An environmental test condition clipping method based on equipment environmental profile and environmental equivalent analysis comprises the following steps:
step 1, determining test environment factors according to equipment service areas.
The equipment or its components/materials must experience different application scenarios during life, different application scenarios represent different environmental profiles, and environmental factors under each profile have different effects and destructive effects on the equipment. In a general outdoor state, the equipment is mainly influenced by environmental factors such as high and low temperature, damp heat, solar radiation and the like, and the influence of temperature (accumulated temperature) in a storage state in a warehouse is more prominent, so that the influence on solar radiation is small and even negligible.
In this step, environmental factors or factor combination categories (abbreviated as test environmental factors) are determined according to the service areas of the equipment, and are mainly classified into 3 categories of I (single factor), II (double factor) and III (multiple factor), and are shown in Table 1. It should be noted that, since the test is focused on the influence and evaluation of life span and the period is generally long, the environmental equivalent in the present invention generally adopts an annual value as a basic characteristic value. Of course, the method is not limited to the annual value, and values of other unit time periods can be used as basic characteristic values, such as month values and quarter values, but when calculating the environmental equivalent, the equivalent normalization comparison is needed by using the values of the same unit time period.
TABLE 1 environmental factors for testing
And 2, acquiring the corresponding environment equivalent and environment equivalent level by combining the determined experimental environment factors.
After defining the environmental factors and their combined categories, an environmental equivalence class is selected. The method comprises the steps of dividing the accumulated environmental equivalent of various environmental factors and combinations under different environmental conditions in different climatic regions of a complete natural year into five grades, namely, low grade, medium grade, high grade and high grade according to statistical calculation, dividing the grades of the various environmental factors and combinations into the grades with low equivalent number of 1-2, medium equivalent number of 3-4, medium equivalent number of 5-6, medium equivalent number of 7-8, medium equivalent number of 9-10 and high equivalent number of 9-10, wherein the specific environmental equivalent division is shown in tables 2-1, 2-2 and 2-3, and the storage accumulated temperature environmental equivalent grade according to the geographical region division is shown in tables 2-4, 2-5 and 2-6.
TABLE 2-1 equivalent and grade division by storage temperature (heat accumulation)
| Sequence number | Accumulated temperature equivalent degree of temperature of the heart | Level of |
| 1 | ≤50000 | △ |
| 2 | 50001～70000 | ▲ |
| 3 | 70001～90000 | ▲△ |
| 4 | 90001～110000 | ▲▲ |
| 5 | 110001～130000 | ▲▲△ |
| 6 | 130001～150000 | ▲▲▲ |
| 7 | 150001～170000 | ▲▲▲△ |
| 8 | 170001～190000 | ▲▲▲▲ |
| 9 | 190001～210000 | ▲▲▲▲△ |
| 10 | ≥210001 | ▲▲▲▲▲ |
TABLE 2-2 outdoor atmospheric temperature-solar irradiation equivalent and grade division
| Sequence number | Equivalent weight of solar radiation W.hr/m 2 | Level of |
| 1 | ≤300000 | 〇 |
| 2 | 300001～350000 | ● |
| 3 | 350001～400000 | ●〇 |
| 4 | 400001～450000 | ●● |
| 5 | 450001～500000 | ●●〇 |
| 6 | 500001～550000 | ●●● |
| 7 | 550001～600000 | ●●●〇 |
| 8 | 600001～650000 | ●●●● |
| 9 | 650001～700000 | ●●●●〇 |
| 10 | ≥7000001 | ●●●●● |
Tables 2-3 are divided by temperature and humidity coupling equivalent and level
| Sequence number | Temperature and humidity coupling equivalent (cal. Hr/m) 3 ) | Level of |
| 1 | ≤10000000 | ☆ |
| 2 | 10000001～15000000 | ★ |
| 3 | 1500001～20000000 | ★☆ |
| 4 | 20000001～25000000 | ★★ |
| 5 | 2500001～30000000 | ★★☆ |
| 6 | 30000001～35000000 | ★★★ |
| 7 | 3500001～40000000 | ★★★☆ |
| 8 | 40000001～45000000 | ★★★★ |
| 9 | 45000001～50000000 | ★★★★☆ |
| 10 | ≥50000001 | ★★★★★ |
Tables 2-4 storage thermal environment equivalent level by geographical region division
| Longitudinal line | Equivalent weight | Level of | Two longitudinal lines | Equivalent weight | Level of | Three longitudinal lines | Equivalent weight | Level of |
| Wanning | 233768.4 | ▲▲▲▲▲ | Urban port prevention | 208371.7 | ▲▲▲▲▲ | Kunming | 114859.9 | ▲▲△ |
| Guangzhou style | 199985.2 | ▲▲▲▲△ | Gui Lin | 178420.3 | ▲▲▲▲ | Chongqing | 182962.6 | ▲▲▲▲ |
| Fuzhou (Fu Zhou) | 182114.8 | ▲▲▲▲ | Long sand | 154124.1 | ▲▲▲△ | Mianyang (lingering yang) | 152873.4 | ▲▲▲△ |
| Tin-free | 152985 | ▲▲▲△ | (Wuhan) | 153739.5 | ▲▲▲△ | Xi ' an | 153069.2 | ▲▲▲△ |
| Shanghai | 153346.5 | ▲▲▲△ | Zhengzhou | 145762.6 | ▲▲▲ | Dunhuang tea | 113146.6 | ▲▲△ |
| Qingdao | 124285.6 | ▲▲△ | Taiyuan (Taiyuan) | 104181.5 | ▲▲ | Lanzhou (Ruo lan) | 88127.9 | ▲△ |
| Yanji (Chinese character of yanji) | 62371.9 | ▲ | Gagnedaqi | 62909.3 | ▲ | Xining medicine | 71164.1 | ▲△ |
| Tianchi | 27820.7 | △ | Desert river | 54688.1 | △ |
Tables 2-5 partition of temperature and humidity coupled environment equivalence classes by geographic region
| Longitudinal line | Equivalent weight | Level of | Two longitudinal lines | Equivalent weight | Level of | Three longitudinal directionsWire (C) | Equivalent weight | Level of |
| Wanning | 44824233 | ★★★★ | Gui Lin | 31077882 | ★★★ | Kunming | 21238629 | ★★ |
| Guangzhou style | 38055349 | ★★★☆ | Long sand | 28305761 | ★★☆ | Chongqing | 29872803 | ★★☆ |
| Fuzhou (Fu Zhou) | 31347528 | ★★★ | (Wuhan) | 28100625 | ★★☆ | Mianyang (lingering yang) | 25385665 | ★★☆ |
| Shanghai | 28563751 | ★★☆ | Zhengzhou | 19807960 | ★☆ | Lanzhou | 13116345 | ★ |
| Qingdao | 21861191 | ★★ | Taiyuan (Taiyuan) | 14777539 | ★ | Xining medicine | 11173032 | ★ |
| Yanji (Chinese character of yanji) | 14852806 | ★ | Gagnedaqi | 11375761 | ★ | |||
| Desert river | 11759026 | ★ |
Tables 2-6 divide outdoor atmospheric temperature-solar irradiation coupled environment equivalent conversion levels by geographic region
| Longitudinal line | Equivalent weight | Level of | Two longitudinal lines | Equivalent weight | Level of | Three longitudinal lines | Equivalent weight | Level of |
| Wanning | 637210 | ●●●● | Gui Lin | 484777 | ●●〇 | Kunming | 642416 | ●●●● |
| Guangzhou style | 465130 | ●●〇 | Long sand | 375519 | ●〇 | Chongqing | 304161 | ● |
| Fuzhou (Fu Zhou) | 513045 | ●●● | (Wuhan) | 430139 | ●● | Mianyang (lingering yang) | 364400 | ●〇 |
| Shanghai | 467115 | ●●〇 | Zhengzhou | 477933 | ●●〇 | Dunhuang tea | 682761 | ●●●●● |
| Dalian (Chinese character) | 568051 | ●●●〇 | Taiyuan (Taiyuan) | 607657 | ●●●● | Lanzhou | 673032 | ●●●●〇 |
| Desert river | 473557 | ●●〇 | Yinchuan | 566740 | ●●●〇 |
Step 3, calculating the environment equivalent of various environmental factors of the equipment in different stages of the life period, representing the level of the various environmental factors in each stage of the life period by the environment equivalent of the environmental factors, defining the environment equivalent conversion coefficient, specifically obtaining the environment equivalent conversion coefficient according to a formula (I),
wherein F represents an environmental equivalent conversion coefficient; w (W) i An environmental equivalent representing environmental factors of each environmental profile of the equipment; w (W) max Representing the maximum value of environmental equivalent of the service area of the equipment, and is usually selected fromEnvironmental equivalents of the baseline environmental factors;
the conversion coefficients of the obtained partial area thermal environment equivalent, thermal-wet coupling environment equivalent and thermal-wet coupling environment equivalent are shown in tables 2, 3 and 4.
TABLE 2 stored thermal environment equivalents and conversion factors for geographical regions
TABLE 3 temperature and humidity coupled environment equivalents and conversion coefficients thereof divided by geographical region
TABLE 4 damp-heat coupling environmental equivalent and conversion coefficient thereof divided by environmental type
The temperature-solar irradiation environment equivalent conversion coefficient of the obtained partial region is shown in tables 5 and 6.
TABLE 5 atmospheric temperature-environmental equivalents of solar radiation divided by geographical region and conversion coefficient thereof
TABLE 6 atmospheric temperature-solar irradiation equivalent and conversion coefficient thereof are divided by environmental type
Step 4, combining the environmental equivalent conversion coefficient obtained in the previous step and the length of time L of the environment to which the equipment is subjected (i.e. the length of service of the equipment in a service area, usually in years), obtaining the total equivalent of the test environment of the equipment according to formula (II),
W＝L×I×F×(1+E)………………………………(Ⅱ)
wherein: w represents the total equivalent of the test environment of the equipment; l represents the length of time the equipment is to experience in the environment of the service area of the equipment; i represents an environmental equivalent reference value of an equipment service area; f represents an environmental equivalent conversion coefficient; e represents an expansion coefficient, and usually has a higher relative standard deviation between the annual value and the annual average value, and typically E is 0.10.
And 5, establishing an equipment environment test recommendation table, shown in table 7, by combining the environment equivalent conversion coefficient and the total test environment equivalent, and determining test conditions according to the total test environment equivalent (the test conditions determined according to the total test environment equivalent belong to the conventional technology and are not described in detail herein).
TABLE 7 environmental test recommendation table
Further description will be given in specific cases.
The rubber products and the metallurgical powder products are adopted as accessories for certain novel equipment due to the structural function, the subtropical marine atmospheric environment in a specific area and the atmospheric environment adaptation performance of the desert in a specific area are required to be checked through environmental tests, and failure data are required to be obtained as soon as possible so as to help to formulate maintenance and accessory replacement cycles.
Environmental test condition cutting 1
Simulating the subtropical ocean atmospheric environment in a specific area and the desert atmospheric environment condition in the specific area, cutting and designing the environmental test condition of rubber materials of a certain brand, and comprising the following four steps:
step 1, determining test environment factors according to equipment service areas: firstly, analyzing application scenes experienced by a certain brand of rubber in the service life of the novel equipment, wherein rubber parts are mainly used as elastic materials and are mainly influenced by outdoor atmospheric temperature and solar radiation, and determining test environment factors or factor combination categories according to the service environment of products to be mainly classified into II types (atmospheric temperature/solar radiation factors);
step 2, combining the determined experimental environment factors to obtain the corresponding environment equivalent and environment equivalent level: selecting a typical area with most environmental representativeness in subtropical ocean atmospheric environment and desert atmospheric environment, selecting Hainanning in subtropical ocean environment area, selecting Dunhuang in Gansu environment area, and respectively calculating the temperature-solar radiation coupling environment equivalent of the two areas, wherein the result is shown in Table 8;
TABLE 8 environmental factors, environmental equivalents, and environmental equivalent grades
| Sequence number | Environment type | Region of | Environmental equivalent | Level of |
| 1 | Subtropical ocean environment | Wanning | 637210 | ●●●● |
| 2 | Dry hot desert environment | Dunhuang tea | 682761 | ●●●●〇 |
Step 3, obtaining an environmental equivalent conversion coefficient: calculating environmental equivalent of environmental factors according to the selected typical areas, and obtaining environmental equivalent conversion coefficients of two areas of Wanning and Dunhuang according to tables 5 and 6, wherein the environmental equivalent conversion coefficients are respectively 0.93 and 1.00;
step 4, obtaining the total equivalent of the test environment of the rubber material of the equipment: calculating the total environment equivalent of the rubber material in subtropical ocean atmospheric environment and desert atmospheric environment, wherein
Dunhuang area: w (W) 1 ＝4.0×682761×1×(1+0.10)＝3004148
Region of Wanning: w (W) 2 ＝4.0×637210×0.93×(1+0.10)＝2607463
The rubber material environmental test recommendation table of the equipment is established by combining the environmental equivalent conversion coefficient and the total equivalent of the test environment, and is shown in Table 9, and the test conditions are determined according to the total equivalent of the test environment.
Table 9 recommended Table for environmental test of rubber Material equipped with
By carrying out environmental tests in Dunhuang areas, a test sample (rubber material) is loaded into a special compression tool according to a predetermined compression rate during the test, the test sample is taken out of the tool after being placed for one day in a standard laboratory environment of a test station, and the height of the test sample is measured by using a rubber thickness gauge after being placed for one day in the same environment, and is taken as an initial height h 0 The method comprises the steps of carrying out a first treatment on the surface of the And then compressing the sample, and periodically detecting the compression set retention rate of the sample to obtain the natural environment test result numberAs seen in table 9, the retention of compression set for the test specimens in service for 4 years decreased by approximately 4 to the failure threshold. By combining the scheme of the invention, the failure or near failure of the test sample (rubber material) in the Wanning area in 1606 days can be directly obtained according to the conversion coefficient and the doubling time.
And (3) further verifying: carrying out natural environment tests on samples (rubber materials) in Wanning areas respectively, wherein the Wanning areas are carried out according to 1.11 times of service time (1606 days); the results are shown in Table 10.
Table 9 results of natural environmental test of samples in Dunhuang
Table 10 results of Natural environmental test of samples in Wanning region
As can be seen from tables 9 and 10, the retention rate of compression set of the samples at each stage was decreased in the same ratio, and was decreased by about 4 to the failure threshold value at the end of the test, indicating that the replacement cycle had been reached. In addition, the retention rate of compression set of the test specimen (rubber material) after 1606 days of service in the Wanning area was 0.6014, which was consistent with the requirement of the previous evaluation (failure or near failure after 1606 days of service in the Wanning area).
The test result shows that after the environmental test is carried out in one typical area, the relevant test results of other areas can be rapidly given, the newly developed equipment used for a plurality of areas can be rapidly subjected to test evaluation, and standard tests are not required to be carried out in each area like the traditional mode, so that the method belongs to the field of changing the existing 'point-to-point test mode' into the 'point-to-face test mode', and the test cost and the test time are greatly saved.
Environmental test condition cutting 2
Simulating serial atmospheric environmental conditions, cutting and designing environmental test conditions of a certain brand of metallurgical powder material, and comprising the following four steps:
step 1, determining test environment factors according to equipment service areas: firstly, analyzing application scenes experienced by a novel device of a certain brand of metallurgical powder in the service life, wherein the metallurgical powder is mainly used as a structural material, is mainly influenced by outdoor atmospheric temperature and humidity, and is mainly classified into class II (atmospheric temperature/humidity factors) according to the determined experimental environmental factors or factor combination categories of the service environment of the product;
step 2, combining the determined experimental environment factors to obtain the corresponding environment equivalent and environment equivalent level: representative typical areas are selected, and the temperature-humidity coupling environment equivalent is calculated respectively, and the results are shown in Table 11;
table 11 typical regional environmental equivalents and grades
| Sequence number | Environment type | Region of | Environmental equivalent | Level of |
| 1 | Subtropical ocean environment | Wanning | 44824233 | ★★★★ |
| 2 | Inland humid and hot climate environment | Chongqing (Jiangjin) | 29872803 | ★★☆ |
| 3 | Dry hot desert environment | Dunhuang tea | 8777810 | ☆ |
Step 3, obtaining an environmental equivalent conversion coefficient: calculating environment equivalent of environment factors according to the selected typical areas, and obtaining environment equivalent conversion coefficients of Wanning, chongqing and Dunhuang areas according to a lookup table 6 and a lookup table 7, wherein the environment equivalent conversion coefficients are 1, 0.67 and 0.2 respectively;
step 4, obtaining the total equivalent of the test environment of the rubber material of the equipment: calculating the total environment equivalent of the metallurgical powder material in subtropical ocean atmospheric environment, inland damp-heat environment and desert atmospheric environment, wherein
Dunhuang area: w (W) 11 ＝3×8777810×0.2×(1+0.10)＝5793355
Chongqing (Jiangjin) area: w (W) 12 ＝3×29872803×0.67×(1+0.10)＝66048707
Region of Wanning: w (W) 13 ＝3×44824233×1×(1+0.10)＝147919969
The recommended table for the metallurgical powder material environment test of the equipment is established by combining the conversion coefficient of the environment equivalent and the total equivalent of the test environment, and is shown in table 12, and the test condition is determined according to the total equivalent of the test environment.
Table 12 recommended Metallurgical powder Material environmental test Meter
Example 2
An environmental test (computer) control system includes a memory, a processor, and a program stored on the memory and executable on the processor; the program comprises an operable test environment factor data module, an environment equivalent and conversion coefficient data module, a calculation module, an input module and an output module;
the test environment factor data module comprises readable and callable contents in a table 1;
TABLE 1 environmental factors for testing
The environment equivalent and conversion coefficient data module thereof comprises readable and callable contents in tables 2 to 6;
TABLE 2 stored thermal environment equivalents and conversion factors for geographical regions
TABLE 3 temperature and humidity coupled environment equivalents and conversion coefficients thereof divided by geographical region
TABLE 4 damp-heat coupling environmental equivalent and conversion coefficient thereof divided by environmental type
TABLE 5 atmospheric temperature-environmental equivalents of solar radiation divided by geographical region and conversion coefficient thereof
TABLE 6 atmospheric temperature-solar irradiation equivalent and conversion coefficient thereof are divided by environmental type
Wherein, the calculation module is used for calculating the total equivalent of the test environment according to the formula (II),
W＝L×I×F×(1+E)………………………………(Ⅱ)
wherein: w represents the total equivalent of the test environment of the equipment; l represents the length of time the equipment is to experience the environment; i represents an environmental equivalent reference value of an equipment service area; f represents an environmental equivalent conversion coefficient; e represents an expansion coefficient, and usually takes the value of the year and the relative standard deviation of the average value of the year to be high, and E takes 0.10 in general;
then calculating an acceleration test condition according to the total equivalent of the obtained test environment;
the input module is used for inputting or selecting the category, application scene and time length of the equipment to be tested or the parts/materials thereof; the output module is used for outputting an equipment environment test recommendation table and acceleration test conditions;
the processor, when executing the program, performs the steps of:
step 1, a memory reads the category, application scene and time length of equipment or parts/materials thereof selected by an input module to be subjected to the environment of an equipment service area, and matches the read information with related data stored on the memory;
step 2, calling the matched related data, calculating the total equivalent weight W of the test environment according to the formula (II), calculating the acceleration test condition according to the obtained total equivalent weight of the test environment, calculating the service doubling time according to the formula (III),
K＝1/F……………………………(Ⅲ)
wherein: f represents an environmental equivalent conversion coefficient;
step 3: generating an environment test recommendation table according to the matched related data and the obtained total equivalent of the test environment;
step 4: and the processor displays the matched related data, the calculated total equivalent of the test environment, the accelerated test conditions and the environment test recommendation table through a human-computer interaction interface.
In step 3 of the present embodiment: matching the matched environmental equivalent conversion coefficient F with corresponding information in the table 7, and marking a recommended item; for example, after the relevant data in the environmental test condition clip 1 in the embodiment 1 is obtained, the table 13 may be directly generated and displayed through the man-machine interface, and the user may directly select the comprehensive grade 1 and the comprehensive grade 2.
TABLE 7 environmental test recommendation table
Table 13 environmental test recommended Table (example)
The invention provides the steps of environmental profile and environmental equivalent analysis of the equipment environmental test, designs a complete process, cuts the environmental conditions of the equipment environmental test based on the equipment environmental profile and the environmental equivalent analysis, objectively reflects the types of main environmental factors in the equipment environmental profile during the service life, quantitatively characterizes the environmental equivalents faced in the equipment service life, is beneficial to quickly selecting and determining (cutting) the proper environmental stress types and the proper environmental stress equivalent levels, designs the equipment environmental test conditions more scientifically and reasonably, improves the equipment environmental damage evaluation and service life evaluation accuracy, effectively shortens the test time, and is suitable for the equipment and product environmental adaptability assessment.
According to the invention, the environment is quantized, a fixed quantization algorithm is used for calculating the characteristic attribute value of one type of environment factor value or combination of multiple types of environment factors, equivalent normalization comparison is carried out on the environments of the same type, the level of the environmental stress or the combined stress of the environment in various environments can be quantitatively described by utilizing the value, and the interval from the general level to the extreme value level is covered. Before the equipment environment test is carried out, a user can select proper stress level for new products to carry out test and examination according to the self environment adaptability requirement, and the stress level with deviation is not only an extreme value level or is determined by a small amount of measured values; the invention overcomes the defects of two methods (extreme value and actual measurement), can obtain the damage effect of the test object under the selected environment, and can assist in judging the adaptability of the similar environments of the test object under different quantity levels in equivalent relation.
Claims (1)
1. An environmental test control system includes a memory, a processor, and a program stored on the memory and capable of running on the processor; the method is characterized in that: the program comprises a test environment factor data module, an environment equivalent and conversion coefficient data module, a calculation module, an input module and an output module which can be operated;
the test environment factor data module comprises contents in a table 1 which can be read and called;
TABLE 1 environmental factors for testing
The environment equivalent and conversion coefficient data module thereof comprise contents in tables 2 to 6 which can be read and called;
TABLE 2 stored thermal environment equivalents and conversion factors for geographical regions
TABLE 3 temperature and humidity coupled environment equivalents and conversion coefficients thereof divided by geographical region
TABLE 4 damp-heat coupling environmental equivalent and conversion coefficient thereof divided by environmental type
TABLE 5 atmospheric temperature-environmental equivalents of solar radiation divided by geographical region and conversion coefficient thereof
TABLE 6 atmospheric temperature-solar irradiation equivalent and conversion coefficient thereof are divided by environmental type
Wherein, the calculation module is used for calculating the total equivalent of the test environment according to the formula (II),
W＝L×I×F×(1+E)………………………………(Ⅱ)
wherein: w represents the total equivalent of the test environment of the equipment; t represents the length of time the equipment is to experience the environment; i represents an environmental equivalent reference value of an equipment service area; f represents an environmental equivalent conversion coefficient; e represents an expansion coefficient, and the relative standard deviation between the annual value and the annual average value is high;
the environment equivalent conversion coefficient comprises a storage accumulated temperature environment equivalent conversion coefficient divided by a geographic area, a temperature-humidity coupling environment equivalent conversion coefficient divided by a geographic area, a humidity-heat coupling environment equivalent conversion coefficient divided by an environment type, an atmosphere temperature-solar irradiation environment equivalent conversion coefficient divided by a geographic area and an atmosphere temperature-solar irradiation equivalent conversion coefficient divided by an environment type;
wherein the environmental equivalent conversion coefficient F is calculated according to the formula (I),
in which W is i An environmental equivalent representing environmental factors of each environmental profile of the equipment; w (W) max Expressing the maximum value, and selecting the environment equivalent of the reference environment factor;
then calculating an acceleration test condition according to the total equivalent of the obtained test environment;
the input module is used for inputting or selecting the category, application scene and time length of the equipment to be tested or the parts/materials thereof; the output module is used for outputting an equipment environment test recommendation table and acceleration test conditions;
the processor, when executing the program, performs the steps of:
step 11, the memory reads the category, application scene and time length of the equipment or the parts/materials thereof selected by the input module to be subjected to the equipment service area environment, and matches the read information with the related data stored in the memory;
step 12, calling the matched related data, calculating the total equivalent weight W of the test environment according to the formula (II), calculating the acceleration test condition according to the obtained total equivalent weight of the test environment, calculating the doubling time K according to the formula (III),
K＝1/F……………………………(Ⅲ)
wherein: f represents an environmental equivalent conversion coefficient;
step 13: generating an environment test environment recommendation table according to the matched related data and the obtained total equivalent of the test environment and the accelerated test conditions;
in step 13: matching the matched environmental equivalent conversion coefficient F with corresponding information in the table 7, and marking a recommended item;
TABLE 7 environmental test recommendation table
Step 14: and the processor displays the matched related data, the calculated total equivalent of the test environment, the accelerated test conditions and the test environment recommendation table through a human-computer interaction interface.
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