文档介绍：The impact of mobile phone radiation on the human body
Lecturer:Liu Fei
The introduction of ic pollution
1
2
Research of mobile phone radiation
3
My summary
4
目
录
Mobile phone radiation mechanism
2018/10/9
made by liufei
2
1
2
3
Maryland, USA,
from 1969 to 1982, 951 men died of a brain tumor, the majority of people are electronic engineers and "Big Brother"
A study released by the Taiwan female long-term use puter-induced breast cancer risk was 43% higher than the average puter staff
By calculating, children under the age of 15 are exposed to average ic induction greater than environment, the risk of leukemia chance for children times more
三个案例
2018/10/9
made by liufei
3
四大污染
Air pollution
Water Pollution
Noise pollution
世界三大污染
What is the number 4 ?
ic pollution
2018/10/9
made by liufei
4
ic Pollution Situation
ic pollution became premier physical contaminated factors
Air conditioning, computers, televisions, microwave ovens, electric blankets, phone, electric shavers and other household appliances, small to large radar, munications, munications, telemetry and remote sensing electrical equipment in normal working hours will have a variety of different wavelengths and the frequency of the ic wave.
小至空调、电脑、电视、微波炉、电热毯、手机、电动剃须刀等家用电器, 大到雷达、中继通信、卫星通信、遥测遥感等电器设备, 在正常工作时都会产生各种不同波长和频率的电磁波。
2018/10/9
made by liufei
5
神经系统、热作用
刺激
LF
HF/RF
Hz kHz MHz GHz
生物效应与频率的关系
频率
中国手机注册用户仅2007年就达到4亿,且市场上使用的手机频为900MHZ和1800MHZ,故研究手机对人体的电磁辐射很有必要。
2018/10/9
made by liufei
6
2018/10/9
made by liufei
9
Mobile phone radiation mechanism
(1)The thermal effects of mobile phone radiation
The thermal effects of mobile phone radiation e from two aspects.
手机在通话过程中, 通过手机天线发射和接收电磁波, 在靠近手机附近的人体头部处于手机辐射的近场中。
由于人体组织和细胞的主要成份是水, 水分子是极性分子, 所以当水分子处在高频的电磁场中, 会随着外界频率的急速变化而不停地快速取向转动摩擦生热, 最后动能转化成热能
人体细胞中的细胞质含有的液体含有各种带电离子, 在电磁场的作用下会形成传导电流, 电流流动时因为人体的介质损耗会由电能转化成热能
first
second
2018/10/9
made by liufei
10