Fundamental Study of Smart IC Card System Using Ultrasonic Information Transmission

Suzuki, Satoshi; Ishihara, Manabu; Katane, Tamotsu; Saito, Osami; Kobayashi, Kazuto

doi:10.1143/jjap.45.4550

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…The signal wave is a square wave with a very small duty ratio, similar to an impulse signal, to reduce the use of battery power. 24) By applying the signal wave to the piezooscillator in the WD, a modulated ultrasonic wave is sent to the R/W-side oscillator through the human body. The R/W receives the ultrasonic waves and generates a voltage.…”

Section: Transmitter With One-chip Microcomputermentioning

confidence: 99%

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Fundamental Development of Ultrasonic Information Transmission System for Wearable Devices

Suzuki¹,

Ishihara²,

Kobayashi³

et al. 2009

Jpn. J. Appl. Phys.

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A wearable device is an electronic device miniaturized to a wearable size with computing and wireless communication functions. In this study, we have applied a communication system using ultrasonic waves to a wearable device. Ultrasonic waves are safe for the human body and do not cause the malfunction of electronic equipment. In addition, communication using ultrasonic waves is effective for preventing ''skimming'' because ultrasonic waves can transmit through the human body and have a large attenuation in air. Wearable devices can also be used in areas where electromagnetic waves are limited. We have developed an experimental prototype device. The prototype contains a one-chip microcomputer used to verify the size and battery consumption of the wearable device. As a result, the developed prototype realized bidirectional communication with a suitable device size and power consumption. The communication speed corresponds to 250 kbps. This value is equivalent to that of a conventional IC card system using electromagnetic waves. With this proposed system, we can achive various practical applications that can maintain absolute privacy while transmitting information through the human body.

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Section: Transmitter With One-chip Microcomputermentioning

confidence: 99%

“…We have studied digital information transmission [21][22][23][24] using modulated ultrasonic waves. [25][26][27][28][29][30] Ultrasonic waves are safe for the human body [31][32][33] and do not cause the malfunction of various electronic instruments.…”

Section: Introductionmentioning

confidence: 99%