in the mid-2th century, with the rapid development of industrial production and the rapid popularization and application of polymer materials, on the one hand, the extensive application of some polymer materials with high resistivity, such as plastics and rubber, and the high speed of modern production process made the electrostatic energy accumulate to a very high degree. On the other hand, the production and use of electrostatic sensitive materials, such as light oil, gunpowder and solid-state electronic devices, have become more and more harmful to industrial and mining enterprises. It has caused it to cause tens of billions of dollars in annual losses to the electronics industry, which does not include potential losses. In the aerospace industry, electrostatic discharge causes rocket and satellite launch failure and interferes with the operation of aerospace vehicles. In the petrochemical industry, there were 116 fire and explosion accidents caused by static electricity in the United States from 196 to 1975. At the end of 1969, in less than a month, the static electricity generated by three 2,-ton supertankers in the Netherlands, Norway and Britain caused explosions one after another, which attracted the attention of scientists all over the world. In recent years, there have been more than 3 large electrostatic accidents in petrochemical enterprises in China, including several cases with losses of more than one million yuan. For example, the 2m3 toluene tank of a petrochemical company in Shanghai, the rubber residue tank of a petrochemical company in Shandong and the aviation fuel tank of a petrochemical company in Fushun all caused serious fire and explosion accidents due to static electricity. After World War II, many industrialized countries have established electrostatic research institutions.
some scientific research institutes in China began to carry out some research work on static electricity in the late 196s, and by the late 197s, Beijing Institute of Labor Protection Science, Beijing Institute of Technology, Petrochemical Corporation and Fudan University had carried out more systematic and in-depth research work on static electricity. Especially since the 198s, the research on static electricity in China has developed rapidly. In 1981, the Electrostatic Professional Committee of the Chinese Physical Society was established and the first national electrostatic academic conference was held. The national and local electrostatic academic conferences were held continuously, and the scope of electrostatic research and application was wider and wider. The scientific research team was growing, and electrostatic technology was increasingly valued by leaders at all levels and national scientific and technological workers. In 1988 and 1993, three international electrostatic application academic conferences were held in Beijing, China, in 1997 and in Beijing in 199. More than ten national electrostatic academic conferences have been held in China.
in the electronic industry, ESD is becoming a hot technology, ESD control has become an independent profession, and the research and development of anti-static devices has also become a rapidly developing field. Suppliers of electrostatic testing equipment, electrostatic protection equipment, anti-ESD products and ESD technical services have made their debut in BLACKPINK. Even so, the harm of ESD cannot be completely eliminated. After all, electrostatic protection runs through the whole life cycle of products. In the process of using and maintaining computers, we should also cultivate awareness of prevention and take appropriate preventive measures.
1. It is best to install anti-static floor in the computer room, and the computer casing needs reliable grounding. For the shielding and grounding of the chassis, we should pay attention to two points: (1) All parts of the chassis should keep good contact, otherwise, the parts that are not connected to the ground will lose the shielding effect; (2) If there is no ground wire in the building, it is necessary to make a simple ground wire. In recent years, newly-built buildings usually have ground wires that meet the specifications. During circuit construction, the live wire, neutral wire and ground wire must be connected to the correct positions on the socket or plug-in strip respectively according to the distribution specifications.
2. Humidifiers should be used in autumn and winter in northern areas to keep indoor air with certain humidity and prevent static electricity from accumulating on equipment, furniture and body.
3. During transportation and storage, the whole computer or parts should be transported in electrostatic shielding bags or conductive handling boxes to prevent the integrated circuit chips from being broken down by static electricity.
4. During use and maintenance, when touching any circuit in the computer, remember to touch the metal case first to discharge the static electricity on your body. Professionals generally have this habit, but the standard practice is to wear anti-static wristbands.
5, computer maintenance, maintenance personnel to carry out maintenance, should be equipped with anti-static pads, anti-static gloves, measuring instruments, soldering irons and other tools and equipment that directly touch the circuit should be grounded to prevent induced static electricity or leakage from damaging the computer chip.
how to control human static electricity (human static electricity protection)?
The human body is the most common source of electrostatic hazards. For static electricity, the human body is a conductor, so measures can be taken to ground the human body
1. Use anti-static floor/anti-static shoes/socks (static electricity is conducted from feet to the ground)
Wear anti-static floor, floor mat and carpet with feet, and people put on anti-static shoes and socks to form combined grounding.
2. Wear an antistatic wrist strap and ground it (static electricity is conducted from the hand to the ground)
It is used to release static electricity from the human body through the hand. It consists of anti-static elastic band, movable snap fastener, spring cord, protective resistor and plug or chuck. The inner layer of elastic band is woven with antistatic yarn, and the outer layer is woven with ordinary yarn.