When it is applied in the wireless charging scenario, charging can be achieved by carrying energy. This feeling is really full of technology. Long-distance charging has never been a big problem in terms of technical implementation, the distance and charging time that can be achieved by this air separation charging technology.
Millet space charging, the technical core isThe self-developed air separation charging pile has 5 built-in phase interference antennas, which can conduct millisecond spatial positioning of the mobile phone, accurately detect the position of the mobile phone phase control array composed of 144 antennas, and transmit the millimeter wave to the mobile phone through beamforming.
The core of millet's air separation charging technology lies in accurate spatial positioning and energy transmission. The self-developed air separation charging pile has 5 built-in phase interference antennas, which can lock the position of the mobile phone with millisecond accuracy. Through the phase control array composed of 144 antennas, the beam forming technology is used to accurately transmit the millimeter wave to the hand, using the latest wireless charging technology Wireless charging RF , wireless charging technology in 2007 obtained 20 patents wireless charging RF , A variety of devices can use a charging base station, mobile phones, MP3 players, power tools and its wireless charging RF his power adapter wired charging situation will not exist.
2, wireless charging principle, the transmitting end is the electric energy through the relevant circuit to produce high-frequency oscillation,They become high-frequency electromagnetic waves (radio waves) and are emitted outward. The receiving end receives electromagnetic waves through the adjustment loop, and after rectification, electric energy is formed for charging the mobile phone. The motor generates electricity, is a (hair) motor, passively rotates, by cutting the magnetic field line of force, so that the motor coil generates current and outputs electrical energy.
3, the following will detail the difference between the two charging methods. Advantages and disadvantages of wired charging and wireless charging Advantages and disadvantages of wired charging are fast charging speed, good stability, and data transmission can also be carried out at the same time. The disadvantage is that the connection line is required and the use is not convenient enough. The advantage of wireless charging is that it is easy to use and does not require a cableYou only need to place the device on the charging base to charge it.
4, the disadvantages of wireless charging efficiency is slightly lower Wireless charging RF : The general charger also has a transformer, but the wireless charging transformer composed of the transmitting coil and the receiving coil is limited in structure, and the energy transmission efficiency is theoretically slightly lower than the general charger. Slow charging speed: Due to the current mobile phone and other receiving devices, most limit the input power, so the charging speed is slow.
5, Qi wireless charging system is composed of base stations and mobile devices. The base station contains one or moreA transmitter. The transmitter will provide the power to receive it. The mobile device contains a receiver that provides power to the load (such as a battery), and the receiver also provides information to the transmitter. An energy conversion unit in the transmitter converts electrical energy into a wireless energy signal, and an energy collection unit in the receiver converts the wireless energy signal into electrical energy.
6, it is the first generation of mobile phone wireless charging, the technology is mature, but can only be single-to-single short-range charging (qi standard, within 1cm, within 5 watts), and can not be similar to WiFi single-to-multiple charging.
Mobile phones use wireless charging, you need to buy a wireless charging base or wireless charging back case to use. Connect the charger to the wireless charging base, and then place the phone or a phone with a wireless charging back case on the wireless charging base. Take off the holster If the phone's holster is too thick or not the original charging holster, it may affect the charging effect, it is recommended to take off the holster and try charging.
Some high-end mobile phones of Huawei can support wireless charging in addition to super wired fast charging, and wireless chargers need to be purchased separately to use wireless charging. NahuaHow to use a wireless charger? Connect the charger (the charging tip that came with your phone or was purchased separately) to a power source. Connect the data cable Connect the charger to the wireless charger using the data cable. Place the phone Place the rechargeable area of the phone in the center of the upper surface of the wireless charger, and the phone shows that it is charging.
Some mobile phones support wireless charging. After the wireless charger is powered, the mobile phone can be charged directly by placing the screen facing up in the center position of the charger or the position suggested by the manufacturer.
Huawei mobile phones can use wireless chargers, the following is an introduction to use. Device: Huawei mobile phone p40pro system: Android 10 First open the desktop of the phone, enter the 【 Service 】 menu. Click My at the bottom right and select My Device. Click and select [View device parameters] to continue the next step. Select the "Fast charge" option to check whether the current phone supports wireless charging.
First of all, not all wireless chargers on the market can be competent for watch charging. Many products do not clearly label the radiation value, which is somewhat worrisome. byThe radiation standard of wireless charging technology has not yet been perfected, and we need to be concerned about the current regulatory requirements, such as the "Electromagnetic radiation Protection Regulations", which stipulate that the electromagnetic radiation of the user in continuous contact with the wireless charger within 24 hours shall not exceed the specific absorption rate (SAR) limit of 0.02W/kg.
Taking 1000mAh capacity lithium battery as an example, the radiation of wireless charger is calculated. 50% charging capacity is about 7~8Wh. If it is required to be full for about two hours, the maximum charging power should reach at least 1W (the maximum power of the GSM900 mobile phone is about 2W); Since mobile phone wireless charging method is willThe phone is placed above the charger rather than inside, so the radiation leakage rate can be significant.
The test found that using a high-sensitivity radiation meter, the radiation value of the wireless charger is between 150 and 180, although it is smaller than the 250 to 627 values in front of a computer screen or the thousands of values when making a call on a mobile phone, but the cumulative effect may not be negligible. At the same time, when wireless chargers, mobile phones, computers and other electronic devices are used together, the radiation value will increase significantly.
1, where there is current, there will be radiation, and where there is signal, there will be radiation. With the advent of the mobile Internet era, the relationship between life and radiation is becoming more and more intimate: they used to "play ambiguous", but now they are "married". With the rise of wireless charging function, the radiation problem is first placed in front of users. With reference to mobile phones, the amount of radiation is negligible.
2, the mobile phone is carried closely, and the wireless router is almost not used closely, so the data traffic radiation is slightly greater than the mobile WiFi Internet access. Extension: in closeIn the case of wireless routers, the electromagnetic radiation test results of the routers are significantly lower than our standard (40μW/cm2), but also far lower than the European standard. As long as the use of qualified Internet access equipment, whether it is WAP data traffic Internet access or mobile phone WiFi Internet access do not have to worry about radiation affecting health. 3, in general, staying in the WiFi environment for a long time, the harm to the human body is not large, if you are still worried, you can stay away from the router, so that you can talk more about the radiation brought by WiFi.
4, WiFi wireless Internet accessThe electromagnetic wave band is generally 4GHz to 5GHz, and the radio frequency electromagnetic wave band used by mobile phones is relatively close (slightly higher than that of mobile phones), which is non-ionizing radiation, its frequency is far lower than ionizing radiation, the thermal effect is minimal, and there is no danger of chemical bond breakage. Mainly, the heating effect on human tissues may affect health, and a relatively large intensity is required to cause harm.
5, radiation is more harmful to the elderly, children, pregnant women In the process of wireless network use, wireless routers, wireless AP and other devices are emitting radio waves all the time, and high doses of electromagnetic radiation will shadowSound and destroy the original biological current and biological magnetic field of the human body, so that the original electromagnetic field in the human body is abnormal. 6, do not deliberately avoid WiFi signal In addition to some people think that WiFi signal like mobile phone signal, can affect human health and sperm quality, some people used to sleep every night must turn off WiFi.
There are four basic principles of wireless charging, which are electromagnetic induction charging, magnetic resonance charging, radio wave charging, and electric fieldCoupled charging, the mainstream standards on the market mainly include Qi standard, PMA standard, A4WP standard, iNPOFi technology and Wi-Po technology. Let's take a look at the principle of wireless charging.
At present, there are four main technical ways to achieve wireless charging: magnetic induction technology, magnetic resonance technology, microwave technology and electric field coupling technology. Among them, magnetic induction technology and magnetic resonance technology are the technologies that are basically used in the current mass production products.
Radio wave type. This is a more mature technology, similar to the early use of ore radios, mainly microConsisting of a wave transmitter and a microwave receiver, it captures the radio wave energy bouncing off the wall, maintaining a stable DC voltage while adjusting with the load. This method requires only a transmitter mounted in a wall plug and a "mosquito" receiver that can be installed in any low-voltage product.
Electromagnetic induction charging, very simple, and the principle of electromagnetic induction in high school is similar, wireless charging the charging base and the terminal are built with coils, so that the two are close to the charging seat and start to supply power from the charging seat to the terminal. Many wireless charging mobile phones are this principle, but the location must be relatively homogeneousCan charge efficiently. And there is also coupling radiation problem, electromagnetic wave coupling will not exist a large magnetic field leakage.
Convenient: no need to connect with a wire when charging, as long as it is placed near the charger. Technically, a charger can power multiple electrical devices, and in the case of multiple electrical devices, it can save multiple chargers, do not occupy multiple power sockets, and there is no trouble of multiple wires winding each other.
The main parameters of dynamic wireless power supply technology include power transmission distance, power, efficiency, adaptability of coupling mechanism to side shift, electromagnetic compatibility and so on.