Mobile phone radiation health assessment method based on radiation cooling effect

Abstract

The invention discloses a mobile phone radiation health assessment method based on radiation heat dissipation effect, which mainly solves the problem that the mobile phone radiation health assessed bythe prior art is not accurate. The implementation scheme comprises the steps of 1 establishing a mobile phone geometry model and a human body geometry model, adopting a tetrahedron unit to divide themobile phone geometry model and the human head geometry model; 2 using a frequency domain finite element method to carry out the electromagnetic simulation on the mobile phone model and the human head model, and obtaining the electric field value of each unit center point of mobile phone model and human head model; 3 calculating the specific absorptivity value of each unit center point of the human head model according to the electric field value; 4 according to the specific absorptivity, using the time-domain finite element method to solve the bio-thermal equation, and setting the radiationheat dissipation effect condition in the process of solving, and obtaining the temperature distribution series of human body. By considering the radiation heat dissipation effect, the method of the invention can effectively improve the accuracy of the radiation health assessment of the mobile phone, and can provide an important reference basis for the radiation health assessment of the mobile phone.

Description

technical field [0001] The invention belongs to the technical field of computational electromagnetics, in particular to a mobile phone radiation health assessment method, which can be used for mobile phone radiation health assessment. Background technique [0002] In recent years, with the rapid development of mobile communication technology and the popularization of mobile phones, whether the electromagnetic radiation of mobile phones will affect people's health has aroused people's great attention. Mobile phones can radiate electromagnetic waves, and part of the energy of electromagnetic waves is absorbed by human tissues, which will cause human organs to heat up. If the temperature of human organs rises too high, it may cause harm to the human body. Due to ethical considerations, it is obviously inappropriate to conduct experiments on electromagnetic and thermal effects on the human body, so numerical simulation technology is widely used in mobile phone radiation health a...

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Problems solved by technology

By reviewing the literature, it is found that the Finite Difference Time Domain (FDTD) method is widely used in mobile phone radiation health assessment ([1] P.Bernardi, M.Cavagnaro, S.Pisa and E.Piuzzi, "Power absorption and temperature elevations induced in the human head by a dual-band monopole-helix antenna phone,"IEEE Transactions on Microwave Theory and Techniques,vol.49,no.12,pp.2539-2546,Dec 2001.[2]T.Togashi et al. , "FDTD Calculations of Specific Absorption Rate in FetusCaused by Electromagnetic Waves From Mobile Radio Terminal Using PregnantWoman Model," IEEE Transactions on Microwave Theory and Techniques, vol.56, no.2, pp.554-559, Feb.2008.), However, this method requires the use of orthogonal grids for geometric discretization, which is difficult to accurately fit curved surfaces, and there is a step approximation error

In addition, when the existing numerical simulation technology simulates the thermal effect of the human body, the thermal radiation effect of the human skin is often ignored, which will also reduce the simulation accuracy.

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