Test And Analysis Of Electromagnetic Compatibility Of Medical Electrical Equipment Using Radio Frequency Energy

Along with the swift development of electronic science and technology,electrical products have been widely applied in various industries.As we known,the science and technology brings benefits to us human beings,generating seriouselectromagnetic pollution likewise.The extensiveexistence of electromagnetic pollution would not only impact the normal operation of electrical equipment,but also the safety and health problem of humans.Consequently,the electromagnetic compatibility has been attachedgreat importance to by all over the world,meanwhile,relevantstandard has been formulated to regulate in medical device industry.In this paper,standard content has been interpreted on the basis of specialized standardsYY 0505-2012 of medical electrical equipment forelectromagnetic compatibility,accordinglyanalyzing the relationship between special requirements from the specialized standards of medical electrical equipment on account of electromagnetic compatibility and general standard.Further investigation and analysis forelectromagnetic compatibility testing of medical electrical equipment using radio frequency energy has been carried on,focusing on the testing frequency band,testing arrangement and testing approach ofmedical electrical equipment using radio frequency energy in radiated emission under different working frequency.Moreover,taking microwave therapy equipment,the high-riskClass-III Medical Devices as an example,nonlinear problem has been detected in the testing equipment.The solution to settle the nonlinear problem has been explored with the aid of theoretical analysis and experimental verification,as well as the evaluation principle for the fundamental performance and conformitycriterion of medical electrical equipment using radio frequency energy.In this paper,combined with electromagnetic compatibility designtheory,unsatisfactory products in radiated emission has been analyzed by taking microwave therapy equipment as an example.installed bandpass filter in The output port and installed filter on power cable,installed Metal spring in zhe Shielding body,Adopting shielding andfiltering method,the radiated emission could be reduced in 1GHz~3GHz,which makes it possible to apply this products dispense withshielded room condition,hence,declining the usage cost for this kind of products.On this basis,corresponding improvement program has been proposed and subsequent consequence after the above rectification has been evaluated aswell.We expect that the experiment achievement could be contribute reference and enlightenment to the electromagnetic compatibility testing of medical electrical equipment using radio frequency energy,further guiding the design of electromagnetic compatibility.