Knowledge of electromagnetic radiation hazards and environmental measurement
Electromagnetic pollution
Recently, the production and usage of mobile phones in China have ranked first, with mobile phone transmission base stations everywhere and household and similar appliances being widely used. Large screen multimedia displays are becoming increasingly popular, and high-voltage power lines and substation facilities are entering urban areas. While these devices and facilities benefit humanity, the accompanying electromagnetic radiation is also affecting our living environment. According to a survey by the World Health Organization, the harm of high doses of electromagnetic radiation to health is multifaceted and complex. The main hazards include harm to the nervous system, harm to bodily function, harm to the cardiovascular system, harm to the reproductive and genetic systems, harm to the visual system, and carcinogenic effects. However, it should be noted that electromagnetic radiation and electromagnetic pollution are two different concepts, and not all electromagnetic radiation constitutes electromagnetic pollution.
With the popularization of scientific knowledge and the continuous strengthening of public self-protection awareness, the public's attention to the impact of electromagnetic radiation on the environment and human health is increasing, especially on the radiation situation of mobile communication base stations and power substations. From the research and literature review of departments such as the Sichuan Health Organization, it can be seen that electromagnetic radiation can only pose a threat to human health if it reaches a certain intensity. Due to the difficulty in detecting the hazards of electromagnetic radiation, a considerable number of the public may overreact to it, and there are often reports of residents protesting against the installation of high-voltage substations and communication base stations around residential areas.
Some special groups (such as pregnant women) have adopted excessive protection measures against electromagnetic radiation, which has affected their work and life. Therefore, it is necessary to establish scientific and reasonable electromagnetic radiation exposure limits and measurement methods, while accurately measuring them, so that the public can understand the situation of electromagnetic radiation. Reasonable protective measures should be taken without causing panic; It is beneficial for protecting public health without hindering the development of industries.
Electromagnetic environment measurement
The intensity of electromagnetic fields has significant differences in their harm to human health. According to literature from relevant research institutions, weaker electromagnetic fields do not pose a threat to human health. Just like the temperature of water, human contact with water around 30 ℃ does not pose a threat to health, while contact with water at 100 ℃ can cause harm. Therefore, it is very important to establish an accurate and reliable measuring and testing device to measure the size of the electromagnetic field.
In addition to the basic limits, in the field of electromagnetic environment, the quantities involved in deriving limits (such as V/m of electric field strength and A/m of magnetic field strength) are also commonly used quantities. These quantities are traditional physical quantities and are also frequently used in other fields.
Knowledge of electromagnetic radiation hazards and environmental measurement
