The radiation waves emitted by the computer are often ignored by people. According to the international MPR Ⅱ radiation safety regulations: in the 50cm distance must be less than equal to 25V / m radiation exposure.
But you know how much computer radiation? Computer radiation: 1, keyboard 1000V/m2, mouse 450V/m3, screen 218V/m4, host 170V/m5, Notebook 2500V/m
In addition, the radiation electromagnetic waves on the human body has eight major harm:
1, cellular cancerous promotion
2, hormonal irregularities
3
3, calcium ion intense loss
4, dementia triggered
5, abnormal pregnancy abnormal birth
6, high blood pressure heart disease
7, electromagnetic wave allergies
8, an increase in suicidal
Use of computers you have to pay attention to the four major hazards of computer radiation are as follows: !)
1, computer radiation pollution will affect the human body's circulatory system, immunity, reproduction and metabolic functions, serious also induce cancer, and will accelerate the proliferation of cancer cells in the human body. `
2, affecting people's reproductive system is mainly manifested in men's sperm quality, pregnant women spontaneous abortion and fetal malformation, etc. 2.}N
3, affecting people's cardiovascular system is manifested in palpitations, insomnia, part of the women's menstrual period disorders, bradycardia, cardiac blood volume, sinus irregularities, leukocytes, immune function, etc. 5S
4, on people's visual system, radiation pollution will affect the human circulatory system, immunity, reproduction and metabolic function, serious cancer, and will accelerate the proliferation of cancer cells. >4, on people's visual system has an adverse effect due to the eyes belong to the human body on the sensitive organ of electromagnetic radiation, excessive electromagnetic radiation pollution will also have an impact on the visual system. The main manifestation of vision loss, causing cataracts, etc. Zc=
The State Administration of Quality Supervision yesterday announced the latest computer product quality national supervision and sampling results show that the electromagnetic radiation in the computer can not be ignored.
The AQSIQ sampling of computer products in Beijing, Shanghai, Tianjin, Chongqing, Zhejiang, Hubei and other 14 provinces and cities, the sampling pass rate of 72%. It is understood that the sampling results show that the current domestic market in the computer products in the computing speed, multimedia features and hardware and software supportability than before have improved, but some companies are not stable enough product quality level. In this sampling, four pass, HP, Muze and other well-known enterprises of computer products were also identified as unqualified products.
It is understood that the computer product quality national inspection and sampling process found in the main quality problems is electromagnetic compatibility in the radiation nuisance, conducted nuisance indicators exceed the standard. Radiation harassment is a computer work to space emitted by an electromagnetic wave interference, this interference will affect other electrical appliances, especially high-sensitivity electrical appliances work properly; Conducted harassment will affect the normal operation of other electrical appliances in the same grid, such as the composition of the entire system of motherboards, display cards, switching power supplies, monitors, keyboards, mice, etc., if you buy a bad radiation harassment caused by the exceeding standards. Sampling found that some enterprises due to insufficient understanding of the standard, parts and components import control and production line assembly quality control is not strict, the lack of the necessary means of detection, resulting in unqualified product quality.
Computer on human health hazards, from the type of radiation, mainly including computers at work and issued by electromagnetic radiation (various electromagnetic rays and electromagnetic waves, etc.), sound (noise), light (ultraviolet, infrared radiation, as well as visible light, etc.), and other radiation "pollution".
From the point of view of the source of radiation, they include CRT monitor radiation sources, chassis radiation sources, as well as speakers, printers, copiers and other peripheral equipment radiation sources. One of the CRT (cathode ray tube) monitor imaging principle, determines that it is difficult to completely eliminate harmful radiation in the use of the process. Because it is working, its internal high-frequency electron gun, deflection coil, high-voltage packages and peripheral circuits, will produce such as ionizing radiation (low-energy X-rays), non-ionizing radiation (low-frequency, high-frequency radiation), electrostatic fields, optical radiation (including ultraviolet, infrared radiation and visible light, etc.) and other rays and electromagnetic waves. While the liquid crystal display is the use of physical properties of liquid crystal, its working principle is completely different from the CRT display, inherently radiation-free (negligible), environmentally friendly "health" type of display; chassis internal components, including high-frequency, power consumption of the CPU, with a large number of internal integration of transistors of the main chip of the card The various components inside the chassis, including high-frequency, power-consuming CPU, various boards with a large number of internal transistors integrated into the main chip, with high-speed DC servo motors of the CD-ROM drive, floppy drive and hard disk, a number of cooling fans and transformers inside the power supply, etc., when the work of the low-frequency electromagnetic radiation and noise interference. In addition, external speakers, copiers and other peripheral equipment radiation source is also a not to be ignored "source".
From the point of view of the degree of harm, there is no doubt that electromagnetic radiation is the most harmful. Medical experts at home and abroad research shows that long-term, excessive electromagnetic radiation will cause direct harm to the human reproductive system, nervous system and immune system, is the main cause of cardiovascular disease, diabetes, cancer mutation and cause pregnant women miscarriage, infertility, teratology and other lesions of the triggering factors, and can directly affect the minors of the body's tissues and bone development, caused by visual acuity, memory loss and decreased hematopoietic function of the liver! In addition, electromagnetic radiation can directly affect the development of minors' body tissues and bones, cause vision, memory loss and decrease in liver hematopoietic function, and lead to retinal detachment in serious cases. In addition, electromagnetic radiation is also a hidden danger to information security, the use of specialized signal receiving equipment can be received and deciphered, resulting in information leakage and unnecessary losses. Excessive electromagnetic radiation will also interfere with other electronic equipment around, affecting its normal operation and electromagnetic compatibility (EMC) problems.
Therefore, electromagnetic radiation has been listed by the World Health Organization as the fourth largest source of environmental pollution following the water, air, noise, and become a hazard to human health of the invisible "killers", protection against electromagnetic radiation has become a priority.
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]: Protection
Health Countermeasures A plan of the spear and shield
As the saying goes: the devil is one foot high, the road is high. In view of the harmful effects of electromagnetic radiation from computers, the relevant international and domestic professional organizations and computer manufacturers have long since begun the work of protecting against computer radiation. After years of efforts, the computer and other electronic products manufacturing, 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 jeopardized. At the same time, the so-called energy-saving, environmentally friendly, radiation-free "green computer" also came into being in recent years.
The harm of electromagnetic radiation for the computer, can be taken to active protection and passive protection of two methods. Passive protection method, that is, in addition to improving the working environment and pay attention to the use of methods, take to frequent contact and operation of computers equipped with radiation clothing, radiation screen, radiation curtains, radiation glass and other measures to reduce or eliminate the harm of electromagnetic radiation; active protection method, it is from the computer electromagnetic radiation "source" -- monitor and chassis components. -- monitor and chassis and other components to start, it will eliminate or shielding.
One is to buy, that is, to buy the strength of manufacturers on the market to meet the "green computer" standard products; the second is DIY, that is, to buy through a variety of certification standards, "green" computer accessories, to create their own healthy computer. Here we will focus on how to choose to meet the radiation protection standard accessories to DIY healthy computer.
The imaging principle of CRT monitors determines that it is difficult to completely eliminate the harmful radiation emitted during use. In order to minimize the intensity of its harmful radiation and protect users' health, international authoritative organizations have successively launched a series of anti-electromagnetic radiation certification standards for electronic devices such as monitors, ranging from the initial MPR Ⅰ (1987), MPR Ⅱ (1990), TCO '92 (1992) to the latest TCO '99, TCO'03 (Figure 1), strict standards have been set for radiation, energy saving, environmental protection, ergonomics and other aspects of the monitor, and only products that have followed and passed the testing of the latest relevant standards in design, manufacturing and finished products can be called "green
Currently, there are nearly 20 certification standards related to monitors. Some of the more famous ones are: the Swedish National Measurement and Testing Authority's MPR II, the Swedish Professional Employees Union's (TCO) TCO series, the U.S. Environmental Protection Agency's (EPA's) EnergyStar, the U.S. Federal Communications Commission's (FCC's) FCC, and China's newest 3C and other certification standards. Below we focus on understanding and mastering a few common certification marks on monitors.
MPR Ⅱ certification Sweden Measurement and Testing Agency in 1987 on the electric and magnetic field radiation on human health effects and put forward one of the earliest standards - MPR Ⅰ. Based on this, it was expanded to MPRⅡ in 1990, which more strictly limits the intensity of magnetic fields generated by monitors in use, etc. It provides 21 monitor standards, including flickering, skipping, linearity, brightness, reflectivity and font size, etc., and puts forward the greatest limitations on the ultra-low-frequency (ELF) and very-low-frequency (VLF) radiations of the monitors.The MPRⅡ standard has become a globally recognized and more stringent electromagnetic radiation. The MPR II standard has become a globally recognized and more stringent electromagnetic radiation detection standard. Most monitors on the market today are MPR II compliant, with the exception of a few inexpensive models.
TCO Series CertificationThe Swedish Confederation of Professional Employees (TCO) began in 1992, on the basis of MPR II, to monitors and other electronic equipment in the ecology (Ecology), energy (Energy), radiation (Emissions) and ergonomics (Ergonomics) and other aspects of the higher requirements and more stringent standards, and gradually evolved into the world's common, more stringent standards. TCO'92/TCO'95/TCO'99/TCO'03 standards have evolved into a series of TCO standards that are now common in the world, including TCO'92/TCO'95/TCO'99/TCO'03 and so on. TCO'92 is a series of standards for monitors, including electromagnetic radiation, automatic power shutdown, provision of power consumption data, compliance with fire prevention and electrical safety, etc. TCO'95 adds requirements for environmental protection and ergonomics on the basis of TCO'92, emphasizing low electromagnetic radiation and low magnetic field radiation standards. TCO'95 adds requirements for environmental protection and ergonomics on the basis of TCO'92, emphasizing low electromagnetic radiation and low magnetic field radiation standards, and its coverage involves monitors, keyboards and system units, etc. TCO'99 further proposes stricter and more comprehensive standards for environmental protection and user comfort, and also puts forward specific regulations for the design of keyboards and portable machines. TCO'03, as the fourth generation of TCO certification standards, has strengthened TCO'03 over TCO'99 in terms of ecology, energy, radiation, and ergonomics of monitors, with the exception of radiation, and has become the world's most comprehensive and stringent certification standard for the new generation of This makes TCO'03 the world's most comprehensive and rigorous certification standard for next-generation, high-quality displays.
FCC certificationThe U.S. Federal Communications Commission (FCC) is an organization that examines electromagnetic signals and electronic devices. It issues FCC certificates which mainly set up electromagnetic specifications to limit the amount of radiated noise emitted by digital devices and switching power supplies, etc. FCC certificates are divided into two levels, A and B, with more stringent technical requirements for Level B. Level A certificates are issued by the FCC on a case-by-case basis. Class A products produce strong electromagnetic waves that can interfere with radios, televisions and other electrical appliances, so they are not suitable for home use, but can be used in offices and other places; while Class B products are said to produce relatively weak electromagnetic waves that do not interfere with microwave signals, so they can be used at home or in the office, such as personal computers or telephones belong to this type of product.
CCCC certification CCC is "China Compulsory Certification (ChinaCompulsoryCerlification)" abbreviation, is China's newly implemented mandatory product certification mark. At the same time 3C certification is also the original CCEE (electrician), CCIB (import and export quarantine), EMC (electromagnetic compatibility) certification of the three in one, respectively, from the safety of electricity, electromagnetic compatibility and wave interference, stability and other comprehensive provisions of the standard. Where included in the national implementation of mandatory product certification directory of products, must be certified by the state-specified certification body to obtain the relevant certificates and affix the certification mark before the factory sales, imports and use in business activities. 3C mark has two versions: CCC (S) and CCC (S&&E). CCC (S) represents only certified by the safety standards, CCC (S&&E). (S&&E) means that the product is certified for both safety and electromagnetic compatibility (e.g., Figure 2).
Understanding and mastering the above certification standards, you will be in the purchase of "green" monitor to do "mind". In fact, when you buy, you only need to "follow the prescription", specializing in picking those through the TCO '99, TCO '03, 3C and other certified products can be. Because these products through the most stringent standards such as TCO'99 testing, they are in the design, materials, manufacturing, factory, sales and other every process, each link, to try to comply with the relevant certifications contained in the standard requirements. So there is basically no need for users to understand the specific technical details of the product, as long as it passes the TCO'99 and other certifications, it means that the product's electromagnetic radiation and other hazards are minimized, is safe to use. For example, a monitor through the TCO '95, in the design to comply with ISO9241 ergonomics, IE950 safety standards, in the material to be widely used in recycling environmentally friendly non-toxic materials, in the production, manufacturing, factory process to comply with the ISO series of relevant standards as well as low electromagnetic radiation (EMI), low magnetic radiation (EMC) requirements and so on. ) requirements, and so on. It can be seen that TCO not only has very strict standards, but also its testing process and testing programs are extremely demanding. Therefore, displays that meet the TCO'95 certification standards are able to meet the requirements as "green" displays in terms of ecology, energy, radiation and ergonomics, and so on. It is certainly a wise choice for you to choose a monitor that is truly high-quality and safe. In terms of the percentage of certified monitors, radiation-free and environmentally friendly TFT LCD monitors account for a large portion of the total. To prevent counterfeiting, you can log on to the official inquiry website of the TCO evaluation organization (www. TCOdevelopment.com), where all manufacturers and brand names certified to the TCO standard can be found.
There are many monitors certified by TCO'99 and above on the market today, with major manufacturers such as Philips, LG, BenQ, acer, AOC, Patriot (aigo), NESO, and Meagher launching their own excellent products.
In the purchase of the chassis to determine whether it has the function of anti-electromagnetic radiation, the easiest way is to check whether it has passed such as EMI, FCC, 3C and other relevant radiation standards certification. Currently on the market more representative of the typical products, there are Huaqi Patriot, Century Star, Gold and Tian, Foxconn, Galaxy, colorful, Tt and other brands of radiation protection chassis.
When using the computer, to adjust the brightness of the screen, in general, the greater the screen brightness, the stronger the electromagnetic radiation, and vice versa, the smaller. However, it can not be adjusted too dark, so as not to affect the effect of viewing because the brightness is too small, and easy to cause eye fatigue.
When operating the computer, pay attention to the screen to maintain an appropriate distance. The closer the screen, the greater the electromagnetic radiation suffered by the human body, so the better is 0.5M away from the screen.
In addition, in the operation of the computer, the face will adsorb a lot of electromagnetic radiation particles, to wash your face with water in a timely manner, which will reduce the radiation received by more than 70%.
The placement of the computer is very important. Try not to let the back of the screen toward the place where there are people, 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, at least 50 centimeters to 75 centimeters away, which can reduce the damage of electromagnetic radiation.
Pay attention to indoor ventilation: scientific research has confirmed that the computer screen can produce a carcinogen called brominated dibenzofuran. Therefore, it is best to install a ventilation fan in the room where the computer is placed, and if not, pay particular attention to ventilation when surfing the Internet.
Care: The most visible part of facial aging is the eyes, so it is especially important to take care of the eyes.
Eye cream: It has a moisturizing effect, and in addition to reducing the problem of dark circles and bags under the eyes, it also has the effect of improving wrinkles and fine lines.
Eye gel: and the effect of eye cream is similar, just gel texture rub up more refreshing, daytime use of the skin without the burden of feeling, most of the elimination of under-eye bags, dark circles, soothing eye skin symptoms.
There is a kind of tea
Commonly used computer in 83% of the people feel eye fatigue, 64% often feel shoulder pain and back pain, in addition, a lot of people appeared to tear, loss of appetite, sore throat, cough, chest tightness and other symptoms, and even slow action, 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 to 3 cups of green tea and eat an orange every 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 can synthesize retinol, but also can make the eyes in the dark light to see things more clearly, so green tea can not only eliminate the hazards 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.
6:00 am to 10:00 pm 8:00 pm before 12:00 pm This is the most exciting time for the brain, to protect the eyes of Oh, remember to rest for ten minutes every once in a while, it's best to install a computer secretary tips you.