Washington University in the United States developed a Wi-Fi charging technology
In the era of mobile Internet, Wi-Fi network is more and more common, and at the same time, mobile phone users are still in "battery shortage anxiety disorder". If you can use the Wi-Fi network to charge the phone, which is what a wonderful thing! This is not a joke. According to the U.S. Science News Web site Connection, Washington State University has successfully developed a technology that uses Wi-Fi networks to charge hardware devices and has succeeded in filling devices such as digital cameras with Wi-Fi coverage of about 10 meters Electricity. The future is expected to charge the phone. Wi-Fi network almost everywhere, the University of Washington R & D team's purpose is to use the Wi-Fi router as a wireless charging device to charge smart phones and other devices. This will be more than the current wireless charging technology to solve user problems. The university has developed a so-called "Wi-Fi power supply system." The system mainly consists of two components, one is a Wi-Fi access point (router), the other part is a custom charge sensor. VamsiTalla, a researcher at the project, said that the charge sensors installed on hardware devices are designed to receive power from radio frequency (RF) signals and convert them to direct current for charging. The team has developed software solutions that make Wi-Fi routers a power source while playing the role of data transfer for traditional routers. It should be pointed out that this Wi-Fi charging technology does not need to replace the traditional wireless router and only needs to deploy programs such as software to provide the charging function without affecting the function of the Internet access. According to the report by the United States, "Science of the Public", after the United States Energous company has introduced a device that uses RF signals in the air to provide power, this device will not be able to serve as a Wi-Fi router when charging. Washington University's new technology allows Wi-Fi networks to transmit electricity and data simultaneously. More precisely, this technique uses the radio waves in Wi-Fi data transmission to transmit power. According to reports, Washington University's research team, looking for a clever solution for Wi-Fi network data transmission and power transmission, do not interfere with each other. BryceKellogg, another researcher at the project, said if people want to make high-power charging using a Wi-Fi network, that will crash the Wi-Fi network because all communication channels transmit power. Teams optimized devices such as routers and sensors to deliver power in the context of not disrupting Wi-Fi data transmission. The transmission of electrical energy does not continue to occupy the Wi-Fi channel, but rather through the decentralization of three Wi-Fi channels. The team tested the Wi-Fi charging system and successfully charged a temperature sensor, digital camera and rechargeable battery at three distances of 6 meters, 5.18 meters and 8.53 meters respectively. Why is there no experiment to charge the more common smartphones? The reason is that the United States Federal Communications Commission (FCC) regulations. The agency provides Wi-Fi router output power up to one watt, why the provisions of this power, is unknown. If this restriction is relaxed, you can see that Wi-Fi charging technology charges more hardware, including cell phones. This exciting new technology, has long been out of the laboratory stage. The University of Washington research team installed an ASUS RT-AC68U router with wireless charging technology in six homes in the city of Seattle. The project team deliberately used the market is very common, has been selling the old router for many years. The researchers said that the process of deploying charging technology, in fact, is an upgrade to the firmware of the router. This technology has not yet invested in large-scale commercial, Washington University research team is also exploring the market opportunities. According to the connection site reported that the research team has formed a new company, hoping to convert Wi-Fi charging technology into a product on the market. In addition, they also need to further enhance the technology, such as to further improve the recoverable straight line distance, the other through software code optimization, so that the router charging and data transmission more stable and efficient. Researcher Tang La said: "We have published research results, can be regarded as the first technical proof of concept, this is not the best solution, we are making better technical performance." In addition, the research team is also considering the use of Wi-Fi charging technology in other industrial and commercial areas. However, further promotion and application, and the United States FCC for the router output power directly related to the restrictions. The Wired Web site commented that while the current Wi-Fi charging technology is only able to charge devices for the time being, it is still a remarkable achievement to "fix the floods." As technology matures, future users of mobile phones and consumer electronics devices may forget about the concept of charging interfaces and charging lines, and only need to use the Wi-Fi network to charge them. This machine is applicable to the twisting, preshrinking and false twisting of the polyester filament yarn. The crepe yarn is used as raw material for the silk-like polyester fabrics. 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