The radiation waves emitted by computers are often ignored by people. According to the international MPR Ⅱ radiation safety regulations: in the 50cm distance must be less than or equal to 25V / M radiation exposure.
But do you know how much radiation is emitted by a computer? Notebook2500V / m computer radiation, the keyboard 1000V / m2, the mouse 450V / m3 screen 218V / m4 host 170V / m5
In addition, electromagnetic radiation on the human body has eight major injuries:
> 1, the role of cellular carcinoma in the promotion of
2, abnormal hormones
Calcium ions intense loss, caused by dementia
Abnormal pregnancy abnormal birth
6, hypertension heart disease
8 increase in suicide 7, electromagnetic wave allergies
> computer, you have to pay attention to the dangers of computer radiation as follows: four!)
Computer radiation pollution affects the body's circulatory system, immune, reproductive and metabolic functions, serious and also induces cancer, and will accelerate the spread of human cancer.
It affects people's reproductive system mainly men, pregnant women experience spontaneous abortion and fetal malformation sperm quality is reduced. 2} N
3, affecting people's cardiovascular system palpitations, insomnia, some women, menstrual disorders, bradycardia, decreased cardiac blood flow, sinus arrhythmia, leukopenia, decreased immune function. 5S
4, the human eye visual system has an adverse effect on the human body on the sensitive organs of electromagnetic radiation, excessive electromagnetic radiation pollution will affect the visual system. The main manifestation of vision loss, causing cataracts and so on. ZC =
Published yesterday by the State General Administration of Quality Supervision, Inspection and Quarantine of the latest computer product quality supervision and sampling results show that electromagnetic radiation in the computer can not be ignored.
The State General Administration of Quality Supervision, Inspection and Quarantine samples 14 provinces and cities of Beijing, Shanghai, Tianjin, Chongqing, Zhejiang, Hubei and other computer products, the sampling pass rate of 72%. It is understood that the sampling results show that computer products in computing speed, multimedia features and hardware and software support in the domestic market in the past than has greatly improved, but the product quality level of some enterprises is not stable enough. In this sampling, the four passes, HP, Muze computer products of well-known enterprises have been recognized as unqualified products.
It is understood that the main quality problems found in the quality inspection of computer products, check the process of electromagnetic compatibility in the radiated nuisance, conducted nuisance indicators exceed the standard. Radiation harassment is a computer workspace emission of electromagnetic interference, this interference will affect other electrical appliances, especially high-sensitivity electrical appliances work properly carried out interference will affect the normal operation of other electrical appliances in the same power grid, like the composition of the entire system motherboards, graphics cards, switching power supplies, monitors, keyboards, mice, buy bad will cause excessive radiation harassment. Sampling found that some companies understand the standard is not enough, parts procurement control and production line assembly quality control is not strict, the lack of the necessary detection means, resulting in unqualified product quality. p> Computer human health risks from the type of radiation, including computers at work, issued by electromagnetic radiation (electromagnetic rays and electromagnetic waves, etc.), sound (noise), light (ultraviolet and infrared radiation and visible light light, etc.) and other radiation pollution. "
From the source of radiation, including CRT monitor radiation source radiation source, chassis and speakers, printers, copiers and other peripheral equipment radiation source CRT (cathode ray tube) monitor imaging principle, it is difficult to completely eliminate the decision of the harmful radiation in the process of use, because it is in the work of its internal high-frequency electron gun, the deflection coil, the ignition coil, and peripheral Circuitry, will produce such as ionizing radiation (low-energy X-rays), non-ionizing radiation (low-frequency, high-frequency radiation), electrostatic fields, optical radiation (including ultraviolet and infrared radiation as well as visible light) and a variety of rays and electromagnetic waves. Liquid crystal display is the use of the physical properties of liquid crystal, its working principle is completely different from the CRT display, is inherently radiation-free (negligible), environmentally friendly "health" type display; chassis of various components, including high-frequency power-consuming CPU internal integration of a large number of transistors in the main chip board, high-speed DC servo motors drives, floppy disk drives and hard disk drives, several power supplies inside the transformer cooling fan, the work will emit low-frequency electromagnetic radiation and noise interference. In addition, external speakers can be connected, peripheral equipment such as photocopiers radiation source is also an important source. "
From the degree of harm, there is no doubt about the harm of electromagnetic radiation. Medical experts at home and abroad research shows that long-term, excessive electromagnetic radiation on the human reproductive system, nervous system and immune system causing direct harm, cardiovascular disease, diabetes, cancer mutation of the main factors leading to miscarriage, infertility, tire abnormality and other lesions of the predisposing factors can directly affect the minor's body tissues and bone development, caused by visual acuity, memory loss and decrease in the function of liver hematopoiesis, and in severe cases can lead to retinal detachment. Serious cases can lead to retinal detachment. In addition, electromagnetic radiation caused by information security risks, the use of special signal receiving devices to receive deciphered, resulting in information leakage, causing unnecessary losses. Excessive electromagnetic radiation around will also interfere with other electronic equipment, affecting its normal operation and electromagnetic compatibility (EMC) problems occur.
Therefore, electromagnetic radiation has been the World Health Organization's fourth largest source of environmental pollution of water, atmosphere, noise, and become an invisible "killer", harmful to human health, electromagnetic radiation, protection has become a priority.
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]: Protection
Health measures of the plan of the spear and shield
As the saying goes: the devil is one foot high and the road is ten feet high. In view of the hazards of electromagnetic radiation from computers, the relevant international professional organizations and computer manufacturers, very early on to protect against computer radiation. After years of effort, manufacturing, computers and other electronic products, such as radiation, energy saving, environmental protection, ergonomics and other aspects of the development of MPR, TCO, FCC, UL and other stringent certification standards to ensure that human health is not compromised. At the same time, the so-called energy-saving, environmentally friendly, radiation-free "green computer" was born in recent years.
The hazards of electromagnetic radiation from computers, take active defense and passive defense of the two methods. Passive protection method, that is, in addition to improving the working environment and pay attention to the use of it to bring it to your regular contact and personnel to operate the computer radiation clothing radiation shielding, radiation curtains, anti-radiation glass measures to reduce or eliminate the harm of electromagnetic radiation; active protection method ", is the computer "source" of electromagnetic radiation - monitor and chassis components. " - monitor and chassis components to eliminate or shield.
First of all, buy, buy the market have the strength of the manufacturers have launched a "green computer" standard; DIY, buy through a variety of certification standards of "green" computer accessories, to create their own healthy computer. Here, we focus on how to choose the radiation standard accessories to DIY healthy computer.
The imaging principle of CRT (Cathode Ray Tube) monitors determines that harmful radiation is difficult to completely eliminate by using it for distribution. In order to maximize the protection of the user's health, to reduce the intensity of its harmful radiation international authoritative organizations have launched a series of anti-electromagnetic radiation certification standards, initially MPR I (1987), MPR Monitors and Other Electronic Devices II (1990), TCO '92 (1992) to the latest TCO '99, TCO '03 (Figure 1), the monitor radiation, energy saving, environmental protection, ergonomic design formulated The TCO'99, TCO'03 (Figure 1), set strict standards for radiation, energy efficiency, environmental protection, and ergonomic design, and only displays that are tracked and tested to the latest standards in the design, production, product, and other sectors can be called "green".
Up to 20 display-related certification standards. One of the better known ones is the MPR II for testing and measurement, the TCO series of the Swedish Professional Employees' Union (TCO), the U.S. Environmental Protection Agency's (EPA's) EnergyStar (ENERGY STAR), the U.S. Federal Communications Commission's (FCC) FCC, and China's 3C certification standards. Here we focus on a few common certification marks for monitors to understand and master.
Sweden MPR II Certification Testing and Measurement Authority in 1987 and one of the earliest standards for electric and magnetic field radiation on human health - MPR I. Building on this, in 1990, after opening its expansion to MPR II, more strictly limit the strength of the magnetic field generated in the use of monitors, 21 display standards, including flickering, jumping, linearity, brightness, reflection and font size, display of ultra-low and low level. font size, and maximum limits on the display of ultra low frequency (ELF) and very low frequency (VLF) radiation. The MPR II standard has become a globally recognized, rigorous test standard for electromagnetic radiation. With the exception of a few low-cost products available on the market, most displays comply with the MPR II specification.
TCO series certified by the Swedish Professional Employees Union (TCO), based on MPR II in 1992, sets higher requirements and stricter standards for monitors and other electronic devices for ecology (ecology), energy (energy), radiation (radiation), and ergonomics (ergonomics) and has gradually evolved into the current worldwide standards, including TCO'92/TCO'95/TCO'99/TCO'95/TCO'99/TCO'99/TCO'99/TCO'99. 95 / TCO'99 / TCO'03, the TCO series of standards. TCO'92 standards for monitors include electromagnetic radiation, power auto shut-off, power consumption data, compliance with fire and electrical safety, as well as many other standards; TCO'95 TCO'92 is based on requirements for environmental protection and ergonomics, emphasizing on low electromagnetic radiation, low magnetic field radiation standards, and its coverage involves monitors, keypads, and system units; and TCO'99 further proposes stricter and more comprehensive standards for environmental protection, user comfort, and user comfort. TCO'99 further proposes more stringent and comprehensive environmental protection, user comfort standards, and specific regulations for keyboard and laptop design. TCO'03 as the fourth generation of TCO certification standards, the display of ecological, energy, radiation, ergonomic requirements, in addition to radiation aspects, TCO'03 TCO'99 than has been strengthened, becoming the world's most comprehensive and strict certification of a new generation of high-quality display standards. /> /> The U.S. Federal Communications Commission (FCC) is an organization that certifies electronic devices tested for electromagnetic signals. It issued the FCC certification specification developed a digital device is limited by the amount of noise and electromagnetic radiation emitted by switching power supplies. FCC certification is divided into two classes, A and B. Class B has more stringent technical requirements. The powerful electromagnetic waves generated by Class A products may interfere with radio, television and other electrical appliances, and are therefore unsuitable for home use, but may be used in places such as offices; Class B products, which means that the electromagnetic waves generated are relatively weak and do not interfere with microwave signals, so they can be used at home or in the office, e.g., personal computers or cell phones belong to this category of products.
CCCC certification CCC "China Compulsory Certification (ChinaCompulsoryCerlification) of the English acronym, China's recent implementation of mandatory product certification mark. 3C certification original CCEE (electrician), CCIB (import and export quarantine), EMC (electromagnetic compatibility) triple Certification, electrical safety, electromagnetic compatibility and radio interference, stability, and comprehensive provisions of the standard. Where included in the implementation of mandatory product certification directory of products, must be certified by the designated certification body qualified to obtain the relevant country's certificate of approval, and affixed with the certification mark before leaving the factory sales, imports and use in business activities. 3C mark has two versions: CCC (S) and CCC (S & & E), CCC (S) stands for only through the safety standards certification, CCC (S & & E), CCC (S) stands for only through the safety standards certification, CCC (S & & E), CCC (S) stands for only through the safety standards certification. S && E) product safety and electromagnetic compatibility certification (Figure 2).
These certification standards are understood and recognized, you will be shown in the "green" to do the purchase "in mind". In fact, when you buy just like the law, the rare TCO'99, TCO'03, 3C certification in these products can pass the most stringent TCO'99 standard testing of the product in the design of each process, materials, manufacturing, factory, sales, every step should be as far as possible in conformity with the relevant certification requirements of the standard, so there is basically no need to understand the product's technical details as long as it Passed the TCO '99 certification, electromagnetic radiation and other hazards minimized product can be used safely. Through such TCO '95 shows that meets ISO9241 ergonomic design, IE950 safety standards, widely used in materials recycling environmentally friendly non-toxic materials, production, manufacturing, process plant to meet the ISO series of standards, low electromagnetic radiation (EMI), low magnetic field radiation (EMC) requirements, and so on. It can be seen that TCO is not the only standard is very strict, extremely demanding test process and test procedures, therefore, in line with the TCO'95 certification standards for displays, ecological, energy, radiation, and ergonomic aspects are able to meet the requirements of the green "display, is a truly high quality, high security monitor, of course, is your wise choice. From the proportion of certified displays, radiation-free, environmentally friendly TFT LCD accounted for a large portion. In order to prevent fraud, you can log on to the TCO Evaluation Organization's official search site website (www. TCOdevelopment.com) where all certified TCO standard manufacturers and brands can be found.
TCO'99 and above certified monitors are plentiful in the market, with manufacturers such as Philips, LG, BenQ, Acer, TPV, Patriot (Aigo), NESO, and Meg launching their own over-the-top products.
Buy chassis to determine whether it has the function of anti-electromagnetic radiation, the easiest way is to see whether such as EMI, FCC, 3C, such as radiation standards certification. More representative of the typical products currently on the market Huaqi Patriot Century Star, Gold and Tian, Foxconn, Galaxy, colorful, TT and other brands of radiation protection chassis.
Using a computer to adjust the brightness of the screen, in general, the greater the brightness of the screen, electromagnetic radiation is strong, and vice versa, the smaller. However, it can not be adjusted too dark, so as not to affect the brightness is too small TV ratings, it is easy to cause eye fatigue.
Operate the computer, pay attention to the screen to maintain an appropriate distance. Closer to the human body from the screen exposed to electromagnetic radiation, the best from the screen is greater than 0.5m.
In addition, when operating the computer, his face will absorb a lot of electromagnetic radiation particles, to wash your face with water in a timely manner, so that the radiation received to reduce more than 70%.
Computer placement is very important. Do not let the back of the screen as far as possible towards someone's place, because the strongest computer radiation is the back, followed by the left and right sides, the front of the screen, but the weakest radiation. To be able to see the words prevail, or at least 50 centimeters to 75 centimeters away, which can reduce the damage of electromagnetic radiation.
To pay attention to indoor ventilation: scientific research has confirmed that the computer screen can produce a carcinogen called brominated dibenzofuran. Therefore, stand in the same room with the computer, it is best to install ventilation fans, if not, the Internet, especially pay attention to ventilation.
Nursing: aging of the face is the most obvious place is the eyes, so eye care is particularly important.
Cream: moisturizing effect, can reduce the dark circles under the eyes, bags, but also has the effect of improving wrinkles, fine lines.
Eye gel: almost efficacy of the eye cream, just gel texture rub skin more refreshing no burden feeling during the day, most of them are to eliminate under-eye bags, dark circles, soothing eye skin symptoms.
Eighty-three percent of people drink tea
Commonly used computer eye fatigue, back pain, 64% often feel shoulder pain, many people appear tearful, loss of appetite, sore throat, cough, chest tightness and other symptoms, and even slow, memory loss.
Computer radiation not only jeopardizes human health, but also affects the quality and efficiency of work. For people who live a stressful and busy life, the easiest way to ward off computer radiation is to drink 2-3 cups of green tea and eat an orange in the morning. Tea is rich in vitamin A original, it is absorbed by the body, can be quickly converted into vitamin A vitamin A not only synthesize retinal quality, but also can make the eyes in the dark light to see things more clearly, so green tea can not only eliminate the harm of computer radiation, but also to protect and improve eyesight. If you are not used to drinking green tea, chrysanthemum tea can also play a role in resisting computer radiation and regulating body functions.
This is the most exciting time, the brain before 6:00 in the morning from 8:00 to 10:00, after 12:00, you have to protect your eyes Oh, I remember to take a ten-minute break from time to time, it is best to install a computer secretary to prompt you.