New Technology Enables Mobile Phones To Run Without Electricity: Wireless Signals Are Used As Energy Sources.

2013/9/6 22:44:00 59

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Mobile Phones Wireless Signals Energy Sources

< p > environmental backreflection technology was developed by researchers from University of Washington. They made small devices without batteries, and the antennas they installed could detect, utilize and reflect television signals that could be acquired by other similar devices. The information can be exchanged by spanmitting the existing signals, and the two devices can communicate with each other. "We can turn wireless signals in the surrounding environment into energy sources and communication media," said Shyam glauta, assistant professor of computer science and engineering at University of Washington. This technology is expected to be applied in many areas, including wearable devices, smart homes and self-sustaining sensor networks "/p".
< p > environmental backreflection technology allows devices and < a href= "http://www.91se91.com/news/index_cj.asp" > sensor > /a > network to spanmit data by reflecting existing signals for information exchange without using batteries. Joshua Smith, an associate professor of computer science, engineering and electrical engineering at University of Washington, said: "our equipment can be" out of nothing "into a network of terrain. You can < a href= "http://sjfzxm.com/DESIGN/designer/index.asp > > /a > these signals, and Morse code communication between battery free devices." < /p >
< p > this technology can be integrated into the mobile phone to provide emergency power when the battery consumes light. In addition, the battery free communication technology can also be used to communicate with each other. For example, an environmental backreflection technique can be installed for a deck chair to let users know where the door a href= "http://www.91se91.com/news/index_z.asp" > key "/a" is located. The smart sensors developed by University of Washington can be permanently implanted into any building to allow communication between buildings. For example, sensors can be implanted into bridges to monitor the health of reinforced concrete. If cracks are found, an alarm will be issued. < /p >
< p > the researchers used the prototype equipment of credit card size to test the environment back reflection technology. They installed antennas on the circuit of each device, and the LED lights on them will flash when they receive signals from another device. Under different circumstances in Seattle, the researchers tested two devices, including apartment buildings, street corners and the top floor of underground parking lots. These tests range from a TV tower to a distance of less than 0.6 miles (about 0.9 kilometers) to about 6.5 miles (10.4 kilometers). < /p >
< p > then, the researchers demonstrated how a payment card could spanfer to another card with the help of the technology of environmental backreflection. This spanfer takes advantage of the surrounding wireless signals. The radio frequency signal in the surrounding environment can act as an energy source as well as a communication medium. They found communication between devices, even between the farthest devices from the TV station. At a distance of 2.5 feet (75 centimeters) and 1.5 feet apart (45 centimeters apart), the receiving device can receive signals from another device at a speed of 1 thousand bits per second. This is enough for data spanmission such as sensor readings, SMS and contact modes. The researchers hope to improve the capacity and scope of the environment back reflection technology communication network. < /p >