Do wireless charging mobile phones emit radiation?丨MSH

The radiation of the wireless charger is calculated by taking a lithium battery with a capacity of 1000mAh as an example. 50% charging capacity is about 1.7~1.8Wh. If it is required to be fully charged in about two hours, the maximum charging power must be at least 1W (the maximum power of a GSM900 mobile phone is about 2W). Since the wireless charging method of mobile phones is to place the mobile phone above the charger instead of inside, the radiation leakage rate may not be small.

At present, some special mobile phones can be charged with wireless chargers, but according to the current technology, the charging efficiency is not comparable to that of wired chargers, and the technology of many wireless chargers is immature, and charging the mobile phone will make the mobile phone abnormal. fever.

Is the radiation value of wireless chargers really greater than that of mobile phones? The staff at Dajiaoting Store, a business hall of Beijing Telecom, tested this. The staff took out a high-sensitivity radiation tester. The instrument can measure the radiation value of mobile phones and other items, and can also sense the degree of electromagnetic pollution in the surrounding environment. The higher the value, the more serious the radiation.

The wireless charger is connected to the power supply, and the instrument test window is placed. The value increases to 150 to 180. The increment is not obvious, but it proves that there is radiation.

The next test is the mobile phone. I made a call with the Samsung mobile phone i579 of the staff in the business hall. The radiation value reached 427 at the moment of connection, and it was about 200 after connection. Then I placed the Sharp SH8010C in the test window to make a call, and the value soared to 2000 at the moment of connection. The value floats around 1000.

According to the "Electromagnetic Radiation Protection Regulations", the average specific absorption rate (SAR) of the whole body for any 6 minutes in a day and 24 hours for ordinary users should be less than 0.02W/kg. But at present, there is no standard specifically for wireless charging.

He Guili, the director of the Tel Laboratory of the Telecommunications Research Institute of the Ministry of Industry and Information Technology, said that it is inevitable that the wireless charger will emit radiation, but since it has been listed, it means that it must meet international standards and will not cause harm to the human body. "As long as the wireless charger is done in accordance with the technical specifications, it will not have radiation hazards to the human body." He Guili said.

It can be seen that the rumors on the Internet are not true. Nowadays, people are more and more concerned about their own health, so they are also paying more and more attention to the radiation problem of electronic equipment. The wireless charging technology is realized by the principle of electromagnetic induction. Although it will also generate radiation, it will not cause harm to the human body.

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