Activities carried out to maintain functional reliability in all environments of intended use, transportation or storage
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synonymenvironmental test(Environmental test) generally refers to environmental simulation test
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Environmental simulation test is an activity carried out to maintain functional reliability under all environments of expected use, transportation or storage.It refers to exposing the product to natural or artificial environmental conditions to undergo its action, so as to evaluate the performance of the product under the environmental conditions of actual use, transportation and storage, and analyze and study the influence degree and action mechanism of environmental factors.
Environmental simulation test equipment is a method for enterprises or institutions to verify the quality of raw materials, semi-finished products and finished products under the conditions of transportation, handling, vibration, etc.The purpose is to verify whether materials and products meet the expected quality objectives in R&D, design and manufacturing by using various environmental test equipment for tests.Widely used in colleges and universities, aviation, aerospace, military, shipbuilding, electricians, electronics, medical, instrumentation, petroleum instrumentation, petrochemical, medical, automotive and motorcycle and other fields.
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The environmental simulation test equipment can carry out high temperature, low temperature, temperature shock (gaseous and liquid), immersion, temperature cycle, low pressure, high low temperature low pressure, constant damp heat, alternating damp heat, high-pressure cooking, sand dust, explosion resistance, salt spray corrosion, gas corrosion, mold, rain, solar radiation, light aging, etc. according to IEC, MIL, ISO, GB, GJB and other standards or user requirements.
(1) Low pressure test: the test is applicable to the weapons transported by air in the cargo hold of the aircraft, and the pressure of the weapons and air transport weapons used on the plateau drops rapidly after the aircraft is injured.The purpose of the test is to test the performance of weapons in low pressure environment and the impact of rapid pressure drop on the performance of weapons.The maximum height of the simulation can reach 30000 m (m), and the temperature value corresponding to the height shall be taken during the test.
(2)High temperature test: During the test, the weapon was in high temperature air, but not directly exposed to sunlight.The test is aimed at storing or using weapons indoors or in a confined space or near heat sources such as engines in high temperature seasons.Only whenSolar radiation testThis test can only be carried out when the high temperature effect cannot be tested.The purpose of the test is to check the performance of storage or use in high temperature environment.
(3) Low temperature test: the test is applicable to the test pieces that are likely to be used in the low temperature environment in the life cycle.The purpose of the test is to test whether the test piece can be stored, manipulated, controlled and operated in a long-term low-temperature environment.
(4) Thermal shock test: the test is applicable to weapons that often experience extremely rapid temperature changes in the predetermined use area or use mode.For example: electronic equipment hangar, missile, photoelectric equipment on the aircraft taking off from the desert airport and rising to high altitude;Weapons dropped from high altitude to desert areas;Weapons transferred from indoor to outdoor in the Arctic.Only the thermal shock test in air will be carried out, and the thermal shock test from air to water may be carried out in the future.The purpose of thermal shock test is to test the impact of sudden changes in ambient temperature on weapon performance.
(5) Solar radiation (sunshine) test: this is a test on weapons exposed to the sun and their manufacturing materials.Solar radiation can causePhotochemical effectAnd thermal effects.In most cases, this test can replaceHigh temperature test。The influence of solar radiation on the use or outdoor storage of weapons or related materials can be examined through sunshine test.
(6)Rain test: The test is applicable to weapons that may be exposed to rain during use.The rain test includes the rain test when there is no wind and the rain test when there is wind.The purpose of the rain test is to inspect the waterproof performance of the rain shielding equipment and the performance of weapons during and after the rain.China Reliability Network
(7) Damp proof test: the test is applicable to weapons that may be used in warm and humid environment.The warm and humid environment is characterized by different seasons in tropical regions and mid latitude regions.The purpose of the test is to test the adaptability of weapons to warm and humid environment.
(8) Mould proof test: warm and humid are conditions for microbial growth, which are widely found in tropical and mid latitude areas.All standard general weapons and equipment shall be designed with mildew prevention in mind.The purpose of the test is to evaluate the degree of mildew of weapons and the impact of mildew on the performance or use of weapons.
(9)Salt spray testSalt is widely distributed on the earth.There is salt in the sea, atmosphere, ground, lakes and rivers, especially in coastal areas where the salt content is relatively large, and the salt content in the sea is the largest.There is no weapon without contact with salt.Therefore, all weapons are in some form of salt environment in their life cycle.The purpose of salt spray test is to examine the influence of salty humid atmosphere on weapon performance, especially to examine the performance of coating protective layer and the compatibility of materials.
(10) Sand dust test: the test is applicable to all mechanical, electrical, electronic and electrochemical weapons used in dry sand or air with high dust content.The test is divided into dust raising test and sand raising test.Dust and fine sand are used for dust raising test, and fine dust can enter gaps, cracks, bearings and joints.The sand lifting test uses 149~850 μ m (μ m) sand particles. Large and sharp sand particles can cause erosion and blockage, reducing the effectiveness, reliability and maintainability of equipment.The purpose of the sand and dust test is to test the use and storage capacity of weapons in the sand and dust environment.
(11) Water immersion test: The water immersion test includes water immersion, dripping and pressurized water tests.The water immersion test is applicable to equipment requiring water tightness and equipment used in full or partial immersion in water.In some cases, this test can replaceRain testCheck the water tightness.The purpose of the test is to test the weapon's ability to be immersed in water without leakage.
(12) Frost rain test: the test is applicable to equipment that will encounter freezing rain in normal use.The purpose of the test is to examine the impact of rain, fog and splashed seawater on the equipment performance after falling on it and icing, and also to evaluate the deicing device and technology.
