| With the rapid development of science and technology, a growing number of household appliances and electronic equipment appear in living environment, Which makes people's lives become more convenient than before. However, people become increasingly concerned about safety issues related to electromagnetic radiation since numerous researches shows that significant exposure to high intensity of electromagnet radiation will cause serious harm to human body.On the basis of the senior's research, this paper designs a portable electromagnetic radiometer. This radiometer can display the value of radiation power density in surrounding environment on the screen of Android mobile terminal devices. The major work and innovating of the article is:(1) Select planar archimedean spiral antenna as the receiving antenna, Then designs a solution tointegrate the antenna and power detection circuit By simulating and test.(2) A power detection circuit is designed, which includes impendence matching network andattenuating circuit.(3) Via processing C8051F410 MCU and CH340 T UART/USB converter on a circuit board, thispaper designs a A/D converter & UART/USB converter circuit, and then develops a micro-shipprogram to realize A/D conversion.(4) A Android application for displaying the measured results of the produced radiometer isimplemented, and the accuracy of produced radiometer verified on the lab environment, whoseresults can meet the requirement of practical application. |
PDF Full Text Request