1. Police in Nanjing, Jiangsu Province, destroyed the black industryChain, found that most of the black heart manufacturers disguised it as a charging bank, plug and other daily necessities. This has to make us think about the extreme fear, how many hidden eavesdropping cameras and other black products around us? As we all know, citizens' privacy is protected by citizens' rights, and the current illegal and criminal behavior of this black industrial chain seriously infringes on citizens' information security.
2, common professional eavesdropping equipment, generally for the police; The so-called wiretapping that can be seen in the consumer market only involves recording, GPS, and video, which are functions that we can see and use on mobile phones, and electronics companies have separated, independent, and heavy related functionsAbout 2 meters of high-power wireless charging transmission distance of up to 5 meters wireless charging technology can be divided into low-power wireless charging and high-power wireless charging two ways. Small power wireless charging often uses electromagnetic induction Nanjing mobile phone wireless charge , such as the Qi method of mobile phone charging Nanjing mobile phone wireless charge , but ZTE's electric vehicle wireless charging method uses induction.
Distance greater than 10 cm, conversion effectThe rate is only about 60%, that is, the sent power is 1000W, and the received power is only 600W.
If the charging efficiency is relatively normal and harmless to the human body, the farthest distance that can be done now should be 5-10cm, and the domestic micro goose technology and Qualcomm should be able to do it. And this is not the public familiar with Qi wireless charging, is magnetic resonance wireless charging, based on the principle of magnetic resonance. Although there are also 1 meter or even farther wireless charging technology, but the current charging power of these are too small, charging speed is too slow, difficult to put into daily use.
Wireless charging distanceThe phone and charger can not be more than 10cm away, the closer the effect is better. Wireless charging technology has always been only related to "small" mobile devices such as smartphones and small-size tablets. However, A4WP (" Wireless Charging Alliance "), one of the three major wireless charging camps, recently announced that its technical standards have been upgraded, and the charging power supported has increased to 50 watts, which means that high-power devices such as laptops and tablets can also achieve wireless charging.
In addition, we shouldUnderstand the charging standards of wireless chargers, because there are different ways of charging standards, there are probably two kinds now, so it is also very important to choose which one is good. In addition, we should also pay attention to the choice of power, because the higher the power, the faster the charging efficiency, but if the power is higher, it may also bring some shortcomings, that is, damage the phone.
Try to choose more than 10W power: with the more mature technology, more and more people pursue charging speed, buy a high-power wireless charger, the future software system upgrade can also be used. It is recommended that you choose power as much as possible when purchasing wireless charging equipmentFor more than 10W wireless charger.
No. The higher the power of wireless charging, the faster the charging. But after a certain speed, it can't go any faster. Otherwise, it's bad for the battery. Affect the service life.
Under the same conditions, the higher the efficiency, the faster the charging speed. However, efficiency is not the only factor determining charging speed. Some manufacturers with strong technical strength improve chip performance, optimize program design, and adjust the current output so that the speed of wireless charging can match or even exceed the speed of wired charging. Choose professional big brands. The principle of wireless charger seems simple, but the performance is great.
Wireless charging efficiency is related to power, the greater the general power, the greater the magnetic field range, the closer the distance, the better the efficiency, and the closer the receiving coil and the sending coil, the more energy conversion efficiencyHigh, power efficiency from 100% to 0% depending on the distance size. The distance is greater than 10 cm, and the conversion efficiency is only about 60%, that is, the sent power is 1000W, and the received power is only 600W.