Is the work of the power station harmful to the body?
Electromagnetic Emission (Electromagnetic Emission) is a kind of electromagnetic energy emitted from the source out of the phenomenon can be divided into radiation emission (Radiated Emission) and conduction emission (Conducted Emission), radiation emission is what we call electromagnetic radiation, Through the space, the useful or unwanted electromagnetic energy ". In general, the main influence factor of the electromagnetic environment is electromagnetic radiation. According to the order of wavelength or frequency of these electromagnetic waves arranged, that is, electromagnetic spectrum. If the frequency of each band is arranged from low to high, they are frequency electromagnetic waves, radio waves, infrared rays, visible light, ultraviolet rays, X-rays and r-rays. The longest wavelength of the radio, the shortest wavelength of cosmic rays. Types of electromagnetic radiation sources 1 Radio and television transmission equipment, the main departments for the radio and television stations around the transmitter and the turntable. This is the most serious electromagnetic radiation, because generally are kilowatt high-power transmitter. 2 communication radar and navigation transmitter equipment communication, including shortwave transmitting station, microwave communication station, terrestrial satellite communication station, mobile communication station.
3 industrial, scientific research, medical high-frequency equipment This type of equipment to convert energy into heat or other energy to be used, but accompanied by electromagnetic radiation generated and leaked out, causing workplace environmental pollution. Industrial electromagnetic radiation equipment: mainly for high-frequency furnace, plastic heat sealing machine, high-frequency medium heating machine. Medical electromagnetic radiation equipment: mainly for high-frequency physiotherapy machine, ultrashort wave therapy machine, ultraviolet therapy machine. Scientific research Electromagnetic radiation equipment: mainly for the electronic accelerator and a variety of ultrasonic devices, such as electromagnetic cookers. .4 traffic system electromagnetic radiation interference, including: electrified railway, light rail and electrified railway, rail tram, no track tram and so on.
The thermal power of the electromagnetic wave power density of 10mW / cm2; micro-thermal effect of 1 mW - mW / cm2; shallow heat effect of 10mW / cm2 below. Thermal effects can cause human tissue or organ irreparable damage, such as: eye cataract, male infertility: when the power of 1000W microwave direct exposure to people, in a few seconds to cause death. 2 non-thermal effects: the body's organs and tissues are weak electromagnetic fields, they are stable and orderly, once the interference by the external electromagnetic field, in a state of balance of the weak electromagnetic field is about the human body's non-thermal effect is reflected in the following aspects: System: the human body repeatedly by electromagnetic radiation, the central nervous system and other aspects of the function changes. Such as conditioned reflex activity is inhibited, there bradycardia and so on. Sensory system: low-intensity electromagnetic radiation, can make people's sense of smell down, when the head by the low-frequency low-power audio pulse, it will make people hear like a machine sound, insects or birds singing sound.
5 power system electromagnetic radiation, high voltage transmission lines, including overhead transmission lines and underground cables, substations, including power plants and transformer power plants. 6 household appliances electromagnetic radiation, including computers, monitors, televisions, microwave ovens, wireless phones and so on. Then what is the harm of electromagnetic radiation on the human body led to people so panic? 1, electromagnetic radiation harm the body of the mechanism of electromagnetic radiation harm the body's mechanism is mainly thermal effects, non-thermal effects and cumulative effects. 1 thermal effect: more than 70% of the human body is water, water molecules by electromagnetic radiation after the friction, causing the body temperature, thus affecting the normal work of the body organs.
