Oct 27 , 2021
The role of environmental climate simulation test chamber and selection
Environmental climate simulation test chamber is the use of scientific and technological means to simulate the natural environmental climate, the destructive nature of modern industrial products caused by the environmental test chamber representative test are: low pressure (high altitude) test, high-temperature test, low-temperature test, thermal shock test, solar radiation (sunshine) test, rain test, moisture test, mold test, salt spray test, sand, and dust test, etc…
In the selection of simulation test items, should be a specific analysis of the use of the test items to be used requirements, should make the selection of test items both on behalf of the main use of the environment, but also to speed up the test, save money. During World War II and the post-war, Western countries, especially the United States established a series of environmental testing sites and laboratories, the development of environmental testing standards. The U.S. Army requires all weapons and equipment, parts and materials, and ammunition must first be sent to the environmental laboratory to simulate environmental testing, and then sent to the environmental test site for field environmental testing, only after passing these tests can be officially delivered to the troops. The U.S. Army has made environmental testing a part of the testing and qualification process.
(1) Low-pressure (high-altitude) test: The test applies to weapons airlifted in the cargo hold of an aircraft, weapons used on a plateau, and airlifted weapons in situations where a rapid drop in pressure occurs after an aircraft injury. The purpose of the test is to test the performance of the use of the weapon in a low-pressure environment and the effect of rapid pressure drop on the performance of the weapon. Simulation of the maximum altitude of up to 30,000m (m), the test takes the temperature value corresponding to the height.
(2) High-temperature test: the test weapon in the high-temperature air, but not by direct sunlight. Test for the high-temperature season in the indoor or confined space or close to the engine and other heat sources of storage or use of weapons. This test is conducted only when the solar radiation test cannot test the effects of high temperatures. The purpose of the test is to test the performance of storage or use in a high-temperature environment.
(3) low-temperature test: the test is applicable to the life cycle is likely to be used in low-temperature environment test pieces. The purpose of the test is to test whether the test piece can be stored in a long-term low-temperature environment, manipulation control, and combat.
(4) Thermal Shock Test: The test is applicable to weapons that are frequently subjected to extremely rapid temperature changes in a predetermined area of use or mode of use. Examples include bombs in electronic equipment pods, missiles, electro-optical equipment, and bomb pods on aircraft that take off from desert airfields and ascend to high altitudes; weapons that are airdropped from high altitudes into desert areas; and weapons that are transferred from indoors to outdoors in Arctic regions. Currently, only airborne thermal shock tests are conducted, but in the future, it is possible to conduct thermal shock tests from air to water. The purpose of the thermal shock test is to test the effect of sudden changes in ambient temperature on the performance of the weapon.
(5) Solar radiation (sunlight) test: This is a test of weapons and their manufacturing materials exposed to sunlight. Solar radiation can cause photochemical and thermal effects. In most cases, this test can replace the high-temperature test. Sunlight tests can test the impact of solar radiation on the use of weapons or related materials or open storage.
(6) rain test: the test is applicable to the use of the process may be subject to rain weapons. The rain test includes no wind when the rain test and the wind when the rain test. The purpose of the rain test is to test the waterproof performance of the rain cover equipment, test the performance of the weapon during and after the rain.
(7) moisture test: the test applies to weapons that may be used in a warm and humid environment. Tropical areas throughout the year, mid-latitude areas have a year of varying lengths of the season in this warm and humid environment. The purpose of the test is to test the adaptability of the weapon to the warm and humid environment.
(8) mold test: warm and humid are the conditions for the growth of microorganisms, widely present in the tropics and mid-latitudes. All standard general armaments and equipment in the design should be considered mold problems. The purpose of the test is to assess the degree of mildew and mildew on the performance of the weapon or the use of the degree of impact.
(9) salt spray test: salt is very widely distributed on the earth. The ocean, the atmosphere, the ground, lakes, and rivers have salt, especially in coastal areas with a relatively large amount of salt, the ocean contains the largest amount of salt. There is no weapon that does not come into contact with salt. Therefore, all weapons are in some form of the salt environment during their life cycle. The purpose of the salt spray test is to test the effect of the salt-containing humid atmosphere on the performance of the weapon, especially to test the performance of the protective coating and the compatibility of the material.
(10) sand and dust test: the test applies to all mechanical, electrical, electronic, and electrochemical weapons used in dry sand or dusty air with relatively high content. The test is divided into the dust test and the sand test. The dust test uses dust and fine sand, and fine dust can enter crevices, cracks, bearings, and joints. The sand test uses 149 to 850 μm (micron) grains of sand. Large, sharp grains of sand can have an erosive and clogging effect, reducing the effectiveness, reliability, and maintainability of the equipment. The purpose of the sand test is to test the use and storage capacity of the weapon in the sandy environment.
(11) water immersion test: water immersion test includes immersion, drip, and pressurized water test. The water immersion test applies to equipment requiring water tightness and full or partial immersion in water for use. In some cases, this test can replace the rain test to test the water tightness. The purpose of the test is to test the ability of the weapon to be immersed in water without leakage.