According to foreign media reports, researchers from the University of California, San Diego, said on Tuesday that its research team has developed a proof-of-concept and more secure and effective Bluetooth wireless technology. This technology can use the natural magnetic field of the human body to transmit data, and will be used in the ultra-low-power wireless communication field of wearable devices in the future.
Although Bluetooth is the preferred standard for short-range wireless communication technology, this technology is not without its drawbacks. For example, two devices that transmit data via Bluetooth usually have to be “unblocked†between each other. If a human-like object is blocked from it, a so-called “path loss†phenomenon will occur, resulting in an increase in equipment. Power to maintain communication stability.
The research results of the University of California, San Diego have technically avoided the above problems. The school's researchers used insulated protection coils to create magnetic fields on the human body and successfully communicated data between the two devices. The principle of this technology is similar to that of nuclear magnetic resonance and wireless medical implants, but the former requires much less energy. In addition, compared with the traditional Bluetooth technology, the "path loss" caused by the conduction of the human body magnetic field can be reduced by a factor of ten. If it is widely used in wearable devices in the future, it will greatly improve the battery life.
“Wearing devices, such as smart watches, etc., one of the problems currently faced is that they run for a short time because they can only use batteries of very small size. With the human body magnetic field communication system, we can expect a significant reduction in energy consumption of the equipment. And the number of charging cycles has dropped dramatically," said Jiwoong Park, Ph.D. student and project leader at the University of California, San Diego.
In addition, the transmission of data through the human body also helps to improve safety. Bluetooth signals are usually distributed in all directions, and theoretically anyone within 30 feet can capture the signal and intercept its content. And if we switch to the human body to conduct, the eavesdropper is not likely to intercept the transmission of data without direct physical contact.
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