Home  Contact Us
  Follow Us On:
 
Search:
Advertising Advertising Free Newsletter Free E-Newsletter
Magazine
  
      2024       2023       2022       2021       2020       2019       2018       2017       2016       2015       2014       2013       2012       2011       2010       2009       2008

TECH: First Battery-Free Mobile Phone Powered By Radio Signals
Share to

First Battery-Free Mobile Phone
Powered By Radio Signals
By Fanny Bates

BT 201812 tech 01首款无电池手机
由无线电信号供电

如果现代智能手机有什么问题,那绝对是因为电池耗尽。 世界各地的移动电话正在执行三种基本操作:通信,发送语音和接收语音,扬声器。 几十年来,他们的角色已经发生变化并变得更加复杂,因此将电池续航时间保持在100%是非常难以实现的。 然而,有一种新的,改变游戏规则的技术将大大降低设备成本,并开辟通向全新一代无电池的道路。

来自西雅图华盛顿大学的研究人员发明了一种无电池手机的原型,其功耗远低于当今世界上任何其他手机。 科学家和电气工程师团队在“交互式,移动式,可穿戴式和无处不在的技术协会论文集”上发表了他们的研究论文,向一个没有充电器和电池的世界迈出了一大步。 他们能够创造出一种功能比任何其他手机都要少得多的设备,并从周围的无线电信号和光线中获取所需的微瓦功率。 到目前为止,这是最先进的模拟信号到数字数据的移动传输。

talking through earphonesIf there’s a glitch in modern-day smartphone technologies, it’s definitely a phone running out of battery. Mobile phones around the world are performing three basic operations: communicate with the base station., transmit the speech and receive the speech and actuate the speakers. Throughout decades, their role has changed and has become more complex, so keeping your battery life at 100% is really hard to achieve. However, there’s a new, game-changing technology which will significantly reduce the cost of devices and open a path to a completely new generation of battery-free gadgets.
 

Battery-Free Phone - Future Of Mobile Devices

A team of researchers from the University of Washington from Seattle has invented a prototype of the battery-free phone that uses much less power than any other phone in today’s world. The team of scientists and electrical engineers have published their research paper in the Proceedings of the Association for Computing Machinery on Interactive, Mobile, Wearable and Ubiquitous Technologies, taking a major leap forward to a world without chargers and batteries. They were able to create a device functioning with much less power than any other phone and harvesting those few microwatts of power it requires from the surrounding radio signals and light. So far, this is the most modern mobile transmission of analog signals to digital data.
 

Converting analog signals to digital has been the most difficult and power-consuming process in mobile phones. To eliminate this, the team of scientists has invented a device that can rely on ambient power sources, radio signals and light. Team member Vamsi Talla says the phone picks up small electrical signals known as radio frequency, or RF waves: “Ambient RF waves are all around us. So, as an example, your FM station broadcasts radio waves, your AM stations do that, your TV stations, your cell phone towers. They all are transmitting RF waves.” Built with off-the-shelf materials, the battery-free phone functions like a walky-talky; instead of a screen, it has a small, touch-sensitive number pad. It keeps the signal analog, and to receive a call, the user must wear headphones. “You can either talk or receive at a single point of time,“ says Talla.

battery free research teamGathering Energy From The Ambient Power

For the phone to gather enough energy, it registers tiny vibrations from the microphone and uses the backscatter technique to transmit signals to a base station. This is a familiar process in physics, used for waves, particles or signals to go back to the original source of energy. So far, it has been widely used in astronomy, photography, and medical ultrasonography. The inspiration to use this type of technique came from one of the team members, whose father served in the army during the Cold War. During that time the Soviet Union bugged a carving of the Great Seal of United States with a device functioning with no battery, before giving it to the American Ambassador as a gift. The latest kind of prototype, believe it or not, gathers radio signals from a base station located at a distance of nine meters.
 

The team also designed a custom base station and, by using Skype, they were able to receive incoming calls as well as dial numbers and place calls on hold. Further on, they have announced that this type of technology could be integrated anywhere, including Wi-Fi routers or standard cellular network. “You could imagine in future that all cell towers or Wi-Fi routers could come with our base station technology embedded in it,” said co-author Vamsi Talla, a former UW electrical engineering doctoral student, and Allen School research associate. “And if every house has a Wi-Fi router in it, you could get battery-free cellphone coverage everywhere.”
 

Future Challenges

Even though it operates without physical batteries, this battery-free phone still requires a small amount of energy, a power budget of 3.5 microwatts. This amount of energy still isn't enough to perform any sort of operation than making and receiving calls. the conversations are not encrypted and the team is working hard to fix this issue, as well as to add some visual display features. Signal strength weakens with distances and the challenge with too many signals in one base station is yet to be resolved. But the product has a bright future, it has the potential to be extremely affordable to manufacture, even less than a dollar.

    Subscription    |     Advertising    |     Contact Us    |
Address: Magnetic Plaza, Building A4, 6th Floor, Binshui Xi Dao.
Nankai District. 300381 TIANJIN. PR CHINA
Tel: +86 22 23917700
E-mail: webmaster@businesstianjin.com
Copyright 2024 BusinessTianjin.com. All rights reserved.