Temperature-humidity-height test program determination method

Abstract

The invention belongs to the field of equipment environment tests, and particularly relates to a temperature-humidity-height test program determination method. The method comprises the following steps: S1, cutting a standard according to an equipment use environment, and preliminarily determining a test program of equipment; s2, adjusting test conditions according to the actual bearing capacity of the equipment; s3, adjusting a test program according to a test assessment principle in combination with the adjusted test conditions; and S4, confirming and optimizing the adjusted test conditions according to the adjusted test program. When the actual equipment use environment requirement is lower than the standard requirement, the test program and the test condition can be adjusted. The application range of the standard to the equipment is expanded to a certain extent, and the completeness of the adjusted test program, the rationality of the condition severity and the feasibility of the test operation are confirmed, so that the adjusted test requirement can meet the actual use requirement.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of equipment environmental test, and particularly relates to a temperature-humidity-altitude test procedure determination method. BACKGROUND

[0002] When natural environment adaptability requirements are proposed for airborne equipment, existing specifications and standards are referred to, and the natural environment test conditions are determined in combination with the development experience of the aircraft and the airborne equipment and the actual use environment. Currently, GJB150.A-2009 Military Equipment Laboratory Environmental Test Methods is mainly referred to, which is a relatively severe general environmental test requirement determination standard. The actual use environment of certain airborne equipment does not reach the severity of the environment in the standard, and the actual bearing capacity of the airborne equipment to the environmental stress does not meet the requirements of the standard. For example, a certain airborne equipment does not meet the requirements of storage and work at-65℃ in GJB150.4A Military Equipment Laboratory Environmental Test Methods Part 4: Low Temperature Test. The airborne equipment cannot be normally started at-65℃, and needs to be normally started at a higher temperature (such as-50℃) to meet the environmental adaptability requirements of working at-65℃. In view of this situation, the high-temperature and low-temperature test requirements need to be adjusted according to the actual use environment of the airborne equipment and the bearing capacity of the equipment, and the temperature-humidity-altitude test conditions and procedures are simultaneously adjusted.

[0003] Therefore, there is an urgent need for a technical solution to overcome or alleviate at least one of the above-mentioned defects of the prior art. SUMMARY

[0004] The purpose of the present application is to provide a temperature-humidity-altitude test procedure determination method to solve the problem that the temperature-humidity-altitude test procedure is difficult to cut and adjust when the temperature requirements in the standard for the natural environment adaptability of the aircraft airborne equipment are too severe.

[0005] The technical solution of the present application is:

[0006] A temperature-humidity-altitude test procedure determination method, comprising:

[0007] Step S1, cutting the standard according to the equipment use environment, and preliminarily determining the test procedure of the equipment;

[0008] Step S2, adjusting the test conditions according to the actual bearing capacity of the equipment;

[0009] Step S3, adjusting the test procedure according to the test examination principle in combination with the adjusted test conditions;

[0010] Step S4, confirming and optimizing the adjusted test conditions according to the adjusted test procedure.

[0011] In at least one embodiment of the present application, in step S1, the standard is tailored according to the equipment use environment, including:

[0012] Identifying the combination of natural environmental factors that the equipment actually faces in the use environment, and tailoring the test procedures of the environmental test from the standard based on the combination of natural environmental factors.

[0013] In at least one embodiment of the present application, the equipment is an airborne device considering temperature-humidity-altitude test requirements.

[0014] In at least one embodiment of the present application, the use environment includes the aircraft use scenario and the airborne device installation position.

[0015] In at least one embodiment of the present application, in step S2, the actual bearing capacity of the equipment is evaluated by the equipment material properties and the numerical simulation results.

[0016] In at least one embodiment of the present application, in step S2, the test conditions are adjusted according to the actual bearing capacity of the equipment, including:

[0017] According to the material properties of the camera equipment, the camera equipment can meet the storage requirements at a low temperature of-65℃, and according to the numerical simulation results, the lowest temperature for normal startup of the camera equipment is-50℃;

[0018] The adjusted test conditions are that the camera equipment works normally at-65℃ and starts normally at-50℃.

[0019] In at least one embodiment of the present application, in step S3, the test conditions in the temperature-humidity-altitude test environmental profile of the test procedure are adjusted simultaneously according to the adjusted temperature, humidity, and altitude test conditions.

[0020] In at least one embodiment of the present application, in step S3, the adjusted test procedure meets three principles: the integrity of the test procedure, the rationality of the condition severity, and the feasibility of the test operation.

[0021] In at least one embodiment of the present application, the integrity of the test procedure includes that the temperature-humidity-altitude test environmental profile of the adjusted test procedure includes three large stages of cold-dry, warm-humid, and hot-dry, and several small stages, and the three large stages each include a performance detection stage.

[0022] In at least one embodiment of the present application, the rationality of the condition severity includes that the adjusted test procedure has equipment use environment stress evaluation means, reasonable arrangement of test stage sequence, and reasonable number of cycles.

[0023] In at least one embodiment of the present application, the feasibility of the test operation includes that the adjusted test procedure can be implemented normally under the laboratory verification conditions, and the partial stages of the test procedure cannot be inoperable due to the adjustment.

[0024] The present application has at least the following beneficial technical effects:

[0025] The temperature-humidity-altitude test procedure determination method of the present application can adjust the test procedure and test conditions when the actual equipment use environment requirement is lower than the standard requirement. To some extent, the standard application range of the equipment is expanded, and through the confirmation of the integrity of the adjusted test procedure, the rationality of the condition severity, and the feasibility of the test operation, it can be ensured that the adjusted test requirement can meet the needs of actual use. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the test procedure before adjustment of one embodiment of the present application;

[0027] Figure 2 is a schematic diagram of the test procedure after adjustment of one embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiments of the present application will be described in more detail below in combination with the drawings of the embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.

[0029] The embodiments of the present application will be described in detail below in combination with the drawings. Figures 1 to 2 The present application will be described in further detail.

[0030] The present application provides a temperature-humidity-altitude test procedure determination method, comprising the following steps:

[0031] Step S1, according to the equipment use environment, the standard is tailored, and the test procedure of the equipment is preliminarily determined;

[0032] Step S2, adjusting the test conditions according to the actual bearing capacity of the equipment;

[0033] Step S3, adjusting the test procedure according to the test examination principle combined with the adjusted test conditions;

[0034] Step S4, confirm and optimize the adjusted test conditions according to the adjusted test procedure.

[0035] The temperature-humidity-altitude test procedure determination method of the present application, in step S1, identifies the combination of natural environmental factors actually faced by the equipment in the use environment, and based on the combination of natural environmental factors, the test procedure of the environmental test is tailored from the standard. The present application is only applicable to airborne equipment considering temperature-humidity-altitude test requirements. The use environment includes the aircraft use scenario and the airborne equipment installation position.

[0036] The environmental adaptability requirements of military equipment are currently mainly referred to GJB 150.A Military Equipment Laboratory Environmental Test Methods, and on this basis, the test items of equipment environmental test are tailored to preliminarily determine the environmental adaptability requirements of the equipment. The key points of test tailoring at this stage are to determine the use environment of the equipment, such as determining the use scenario of the aircraft and the installation position of the airborne equipment, and tailoring the standard based on the natural environmental factors that may be encountered in the use environment.

[0037] In an embodiment of the present application, according to the standards such as GJB 150.A and the aircraft use scenario, it is determined that the minimum temperature of a certain type of aircraft in the air use environment is-65℃, and the minimum use environment temperature on the ground is-50℃. A certain type of camera equipment is installed in a non-airtight area and has no temperature control measures. The minimum temperature of the use environment of the camera equipment should also be-65℃, and should meet the corresponding temperature-humidity-altitude requirements. The specific test procedure is as shown in Figure 1 .

[0038] The temperature-humidity-altitude test procedure determination method of the present application, in step S2, evaluates the actual bearing capacity of the equipment through the material properties of the equipment and the numerical simulation results. In an embodiment of the present application, the adjustment method of the test conditions is: according to the material properties of the camera equipment, it is obtained that the camera equipment can meet the storage requirements at a low temperature extreme of-65℃, and according to the numerical simulation results, it is obtained that the minimum temperature for normal start of the camera equipment is-50℃; the adjustment of the test conditions is: the camera equipment normally works at-65℃ and normally starts at-50℃.

[0039] The test conditions proposed in Military Equipment Laboratory Environmental Test Methods are relatively severe requirements, and there is a certain difference between them and the actual use environment conditions of the equipment and the actual bearing capacity of the equipment, i.e. the standard requirements may be over-constrained for some equipment. Based on this, it is necessary to clarify whether the reason for not meeting the GJB requirements is unreasonable design or unreasonable natural environmental adaptability requirements, and if the requirements are unreasonable, the maximum environmental stress that the equipment can bear is evaluated by using numerical simulation and other evaluation methods to adjust the corresponding test conditions.

[0040] In an embodiment of the present application, according to the low temperature limit that the camera equipment material can withstand and the numerical simulation results under the equipment use environment, it is found through evaluation that the equipment can meet the requirement of storage at a low temperature limit of -65℃, but cannot be normally started at -65℃, and needs to be started at a higher temperature before it can work normally at -65℃, so the low temperature limit for starting needs to be adjusted. Through simulation and evaluation in combination with the aircraft use environment (the minimum ground temperature is -50℃), it is found that the camera equipment can be normally started at a low temperature limit of -50℃ on the ground, so the low temperature working environment test requirement is adjusted to: normally started at -50℃; normally worked at -65℃. The temperature-humidity-altitude test requirement is changed synchronously.

[0041] In the method for determining the temperature-humidity-altitude test procedure of the present application, in step S3, the test procedure is determined according to the test evaluation principle in combination with the adjusted test conditions, and the test conditions in the temperature-humidity-altitude test environment profile of the test procedure are adjusted synchronously according to the adjusted temperature, humidity and altitude test conditions. The adjustment of the test conditions may affect the determination of the test procedure. For the temperature-humidity-altitude test procedure, if the high temperature and low temperature conditions are adjusted, the test conditions in the temperature-humidity-altitude test environment profile also need to be adjusted synchronously to match the actual use environment and the actual bearing capacity of the equipment.

[0042] Three principles should be observed when adjusting the temperature-humidity-altitude test procedure: the integrity of the test procedure, the reasonableness of the condition severity and the feasibility of the test operation. First, the integrity of the test procedure: the temperature-humidity-altitude test environment profile includes three large stages from “cold-dry” to “warm-humid” to “hot-dry” and several small stages, and when adjusting the test procedure, it should be ensured that each test stage exists, including the detection stage of functions / properties. Second, the reasonableness of the condition severity: the reasonableness can be ensured by correct evaluation of the actual use environment stress of the airborne equipment, appropriate arrangement of the test stage sequence and reasonable clipping of the cycle number. Third, the feasibility of the test operation: the adjusted test procedure should be able to be normally implemented under laboratory verification conditions, and should not cause some stages of the test procedure to be inoperable due to adjustment, such as causing some functions / properties to be unable to be detected.

[0043] In an embodiment of the present application, the normal temperature-humidity-altitude test cycle procedure is as follows: Figure 1As shown, the initial stage is a "cold-dry" stage, which can be compared to low-temperature storage and work test, so after the above adjustment under the condition of low-temperature work test, the test procedure of the "cold-dry" stage should change the "change to cold-dry" and "soaking" stages to start under the condition of-50°C, and should add the "cooling" and "temperature stabilization" stages to reduce the temperature from-50°C to-65°C, so that the test enters the low-temperature work stage of-65°C. The adjusted temperature-humidity-altitude test cycle procedure is as follows Figure 2 As shown.

[0044] The temperature-humidity-altitude test procedure determination method of the present application, in step S4, confirms and optimizes the adjusted temperature-humidity-altitude test conditions, to ensure the integrity of the adjusted test procedure, the rationality of the harshness of the test conditions, and the feasibility of the test operation. If there are corresponding problems in the integrity, rationality and feasibility, the problems should be solved through optimization of the test procedure.

[0045] In an embodiment of the present application, in addition to the "change to cold-dry" and "soaking" stages corresponding to-65°C, the adjusted test procedure contains all the test procedures before the adjustment, and the first two stages are essentially low-temperature storage tests, which can be evaluated through low-temperature storage tests, so the integrity of the test procedure can be ensured. Through analysis and evaluation of the in-flight / ground use requirements of the aircraft and the starting and working ability of the airborne equipment under low temperature, it is determined that the camera equipment can be started on the ground and worked in the air, so that the low-temperature resistance of the equipment and the harshness of the actual use of the low-temperature environment of the equipment can be considered at the same time; at the same time, the sequence setting of the temperature-humidity-altitude test cycle procedure also meets the actual use sequence and environmental stress evaluation requirements, so the rationality of the harshness of the test conditions can be ensured, that is, neither over-constrained (requiring more harsh than the actual use conditions) nor under-constrained (requiring less harsh than the actual use conditions). In terms of test operation, the adjusted test procedure only adds two processes of "cooling" and "temperature stabilization", and the operation of these two processes and the subsequent stage of changing from "temperature / humidity" to "hot-dry" is basically the same, so the feasibility of the test operation can also be ensured.

[0046] The temperature-humidity-altitude test procedure determination method of the present application, in combination with the use scene of the aircraft, preliminarily trims the environmental test requirements of the airborne equipment according to GJB 150.A-2009 "Military Equipment Laboratory Environmental Test Method", and further determines the temperature type test conditions of the airborne equipment according to the installation position of the airborne equipment on the aircraft and the environmental stress conditions that the airborne equipment may be subjected to in the use process. The bearing capacity of the airborne equipment to the temperature type environmental stress is evaluated, combined with the actual use environment, to give a conclusion whether the GJB 150A requirement is too harsh, and if it is too harsh, the temperature type test conditions are adjusted by analyzing and evaluating the maximum environmental stress actually used by the airborne equipment.

[0047] The temperature-humidity-altitude test procedure determination method of the present application can adjust the test procedure and test conditions when the actual equipment use environment requirement is lower than the standard requirement. To some extent, the standard is expanded to the applicable range of equipment. Through the confirmation of the integrity of the adjusted test procedure, the rationality of the condition severity and the feasibility of the test operation, it can be ensured that the adjusted test requirement can meet the needs of actual use.

[0048] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for determining a temperature-humidity-altitude test procedure, characterized in that, include: Step S1: Adapt the standard according to the equipment's operating environment and preliminarily determine the equipment's testing procedures; Step S2: Adjust the test conditions according to the actual bearing capacity of the equipment; Step S3: Adjust the test procedure according to the test evaluation principles and the adjusted test conditions; Step S4: Confirm and optimize the adjusted test conditions according to the adjusted test procedure.

2. The method for determining the temperature-humidity-altitude test procedure according to claim 1, characterized in that, In step S1, the standard is tailored according to the equipment's operating environment, including: Identify the actual combination of natural environmental elements that the equipment faces in its operating environment, and tailor environmental testing procedures from standards based on this combination of natural environmental elements.

3. The method for determining the temperature-humidity-altitude test procedure according to claim 2, characterized in that, The equipment is an airborne system designed to meet the requirements of temperature, humidity, and altitude testing.

4. The method for determining the temperature-humidity-altitude test procedure according to claim 3, characterized in that, The usage environment includes the aircraft usage scenario and the installation location of airborne equipment.

5. The method for determining the temperature-humidity-altitude test procedure according to claim 4, characterized in that, In step S2, the actual load-bearing capacity of the equipment is evaluated by the material properties of the equipment and the results of numerical simulation.

6. The method for determining the temperature-humidity-altitude test procedure according to claim 5, characterized in that, In step S2, the test conditions are adjusted according to the actual bearing capacity of the equipment, including: Based on the material properties of the camera equipment, it is determined that the camera equipment can meet the storage requirements at a low temperature of -65℃. According to the numerical simulation results, the minimum temperature for normal startup of the camera equipment is -50℃. The test conditions were adjusted to: the camera equipment should operate normally at -65℃ and start normally at -50℃.

7. The method for determining the temperature-humidity-altitude test procedure according to claim 6, characterized in that, In step S3, the test conditions in the temperature-humidity-altitude test environment profile of the test procedure are adjusted synchronously according to the adjusted temperature, humidity, and altitude test conditions.

8. The method for determining the temperature-humidity-altitude test procedure according to claim 7, characterized in that, In step S3, the experimental procedure is adjusted to meet three principles: the completeness of the experimental procedure, the reasonableness of the condition severity, and the feasibility of the experimental operation.

9. The method for determining the temperature-humidity-altitude test procedure according to claim 8, characterized in that, The completeness of the test procedure includes: the adjusted test procedure temperature-humidity-altitude test environment profile includes three major stages: cold-dry, warm-humid, and hot-dry, as well as several minor stages, and each of the three major stages includes a performance testing stage.

10. The method for determining the temperature-humidity-altitude test procedure according to claim 9, characterized in that, The rationality of the stringency of the conditions includes: the adjusted test procedure has means for assessing the stress of the equipment's operating environment, a reasonable arrangement of the test phase sequence, and a reasonable reduction in the number of cycles.

11. The method for determining the temperature-humidity-altitude test procedure according to claim 10, characterized in that, The feasibility of the test operation includes: the adjusted test procedure can be carried out normally under laboratory verification conditions, and the adjustment should not cause some stages of the test procedure to become inoperable.

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