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Unconstrained monitoring of ECG and respiratory variation in infants with underwear during sleep using a bed-sheet electrode unit

Unconstrained monitoring of ECG and respiratory variation in...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Akinori Ueno Yoshihiro Yama Department of Electrical and Electronic Engineering Tokyo Denki University Chiyoda Tokyo Japan Masters Program in Electronic and Computer Engineering Tokyo Denki University Hatoyama Saitama Japan

An approach is proposed for obtaining both electrocardiographic potential and respiratory variation signal from infants lying supine with underwear during sleep. Capacitively coupled bed-sheet electrode unit and a methodology of capacitive sensing were employed to realize the approach. A pilot device was fabricated to explore the feasibility of the approach and evaluation experiments were conducted for 5 infants aged from 43 to 174 days. The results revealed that two outputs of the developed device synchronized respectively with the reference ECG and sleep breath in all experiments. The present device appears promising for application to bedding as an unconstrained method for ECG and respiratory variation monitoring of neonates or infants during sleep.

关键词： Electrocardiography Electrodes Pediatrics Low-pass filters Couplings Monitoring Sensors

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A handle electrode system for measuring heart rate while riding a bicycle

A handle electrode system for measuring heart rate while rid...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Masutaka Watanabe Sosuke Tsukamoto Hiroshi Hoshino Masters Program in Electronic and Computer Engineering Graduate School of Science and Engineering Tokyo Denki University Hiki Saitama Japan School of Science and Engineering Tokyo Denki University Hiki Saitama Japan

In this paper, a handle-electrode system is proposed for obtaining the heart rate of a user while riding a bicycle. The system was designed to measure the user's heart rate by only gripping the handle of a bicycle. Three electrodes made from conductive cloth were adhered to the handle. A method detecting heart-rate from the obtained electrocardiogram was also proposed. To assess the applicability of the proposed system, a simple experiment was performed. The experiment was performed in four conditions of road surfaces; lawn, asphalt, a tiled, and an uneven road. Experimental result suggests that the proposed system can be useful for obtaining R waves while riding a bicycle.

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Two-dimensional location and direction estimating method

Two-dimensional location and direction estimating method

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Teruhiro Haga Sosuke Tsukamoto Hiroshi Hoshino Masters Program in Electronic and Computer Engineering Graduate School of Science and Engineering Tokyo Denki University Hiki Saitama Japan School of Science and Engineering Tokyo Denki University Hiki Saitama Japan

In this paper, a method of estimating both the position and the rotation angle of an object on a measurement stage was proposed. The system utilizes the radio communication technology and the directivity of an antenna. As a prototype system, a measurement stage (a circle 240mm in diameter) with 36 antennas that placed in each 10 degrees was developed. Two transmitter antennas are settled in a right angle on the stage as the target object, and the position and the rotation angle is estimated by measuring efficiency of the radio communication of each 36 antennas. The experimental result revealed that even when the estimated location is not so accurate (about a 30 mm error), the rotation angle is accurately estimated (about 2.33 degree error on average). The result suggests that the proposed method will be useful for estimating the location and the direction of an object.

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Development of a Wireless Capacitive Sensor for Ambulatory ECG Monitoring over Clothes

Development of a Wireless Capacitive Sensor for Ambulatory E...

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29th Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBS 2007), vol.14

作者： Yoshihiro Yama Akinori Ueno Yoshinori Uchikawa Masters Program in Electronic and Computer Engineering Tokyo Denki University Hatoyama Saitama Japan Department of Electrical and Electronic Engineering Tokyo Denki University Tokyo Japan Department of Electronic and Computer Engineering Tokyo Denki University Saitama Japan

We present a wireless capacitive sensor for ambulatory ECG monitoring. The device is capable of detecting electrocardiographic potential through underwear. It is based on capacitive coupling involving the electrode, the underwear, and the skin. Validation of the system revealed the following: (1) The frequency response of the device with the underwear revealed that the gain of the detected signal was reduced, but distortion of the signal within the pass-band (from 6 to 45 Hz) was minimal even with the underwear. (2) The signal displayed a periodic waveform synchronized with the simultaneously recorded ECG, even when the underwear was inserted between the electrode and the skin. (3) Although the signal was seemed deteriorated slightly while walking, R-waves were recognized easily. Although there is still room for improvement in terms of its practical use, the proposed approach appears promising for application to ambulatory ECG monitoring.

关键词： Wireless sensor networks Capacitive sensors Electrocardiography Monitoring Electrodes Skin Frequency response Signal detection Distortion Frequency synchronization

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A Noncontact Measurement of Saccadic Eye Movement with Two High-speed Cameras

A Noncontact Measurement of Saccadic Eye Movement with Two H...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Akinori Ueno Yuji Otani Yoshinori Uchikawa Department of Electronic and Computer Engineering Tokyo Denki University Saitama Japan Masters Program in Electronic and Computer Engineering Tokyo Denki University Saitama Japan

A noncontact method for measuring saccadic eye movement with two high-speed cameras is proposed. The method is based on image processing for acquiring the center gravity of one pupil of the subject and also on stereo photogrammetry for estimating three-dimensional coordinate of the pupil. The proposed method was examined through experiments using a imitated eye ball and using a real human subject. The results showed a possibility of the method for the measurement. Since dynamic characteristics of the saccadic eye movement is reported as a promising index for monitoring human vigilance level according to the author's previous research works, this method can be utilized for accident prevention system in the future. However, there is still room for improvement in measuring accuracy and stability to the body motion in terms of its practical use

关键词： Cameras Image processing Monitoring Gravity Motion measurement Humans Vehicle dynamics Accident prevention Psychology Cities and towns

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An Application of Capacitive Electrode for Detecting Electrocardiogram of Neonates and Infants

An Application of Capacitive Electrode for Detecting Electro...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Tsuyoshi Kato Akinori Ueno Sachiyo Kataoka Hiroshi Hoshino Yoji Ishiyama Masters Program in Electronic and Computer Engineering Tokyo Denki University Saitama Japan Department of Electronic and Computer Engineering Tokyo Denki University Saitama Japan Apprica Childcare Institute Tokyo Japan School of Health Sciences Kyorin University Tokyo Japan

A new system has been developed for obtaining electrographic potential through thin underwear inserted between the measuring electrodes and the skin of a neonate or an infant when lying supine. The system is based on capacitive coupling involving the electrode, the underwear, and the skin. Validation of the system revealed the following: (1) the signal detected using the system displayed a periodic waveform synchronized with the simultaneously recorded ECG, even when thin underwear was inserted between the electrode and the skin, (2) the gain of the system when the cloth was inserted decreased as the frequency increased. The present system appears promising for application to bedding as a non-invasive and awareness-free method for ECG monitoring of neonates or infants. However, there is still room for improvement in terms of its practical use, because the high-frequency component of the signal was depressed in comparison with the reference ECG

关键词： Pediatrics Electrodes Electrocardiography Skin Educational institutions Dielectrics and electrical insulation Biomedical monitoring Bioelectric phenomena Cardiac disease Educational technology

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