Pub Date : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827730
S. Banerjee, Changzhan Gu, Changzhi Li
This paper presents a novel noncontact vital sign detection (VSD) system, which integrates an entire radar transceiver along with advanced signal processing algorithms in one compact PXI (Peripheral Component Interconnect eXtensions for Instrumentation) system. Realtime signal processing has been implemented using automatic DC calibration based on compressed sensing algorithm and ‘differentiate and cross-multiply’ (DACM) demodulation algorithm. Experimental results show that the proposed compact instrument based radar is able to measure respiration motions with simple hardware configuration. This facilitates many proof-of-concept studies for noncontact vital sign detection.
{"title":"PXI-based non-contact vital sign detection system","authors":"S. Banerjee, Changzhan Gu, Changzhi Li","doi":"10.1109/BIOWIRELESS.2014.6827730","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827730","url":null,"abstract":"This paper presents a novel noncontact vital sign detection (VSD) system, which integrates an entire radar transceiver along with advanced signal processing algorithms in one compact PXI (Peripheral Component Interconnect eXtensions for Instrumentation) system. Realtime signal processing has been implemented using automatic DC calibration based on compressed sensing algorithm and ‘differentiate and cross-multiply’ (DACM) demodulation algorithm. Experimental results show that the proposed compact instrument based radar is able to measure respiration motions with simple hardware configuration. This facilitates many proof-of-concept studies for noncontact vital sign detection.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"210 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130158417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827735
Yeh-Cheng Chen, Hung-Min Sun, Ruey-Shun Chen
With the upcoming aging society and emerging of some newly discovered chronic diseases, the demand of hospital nursing for elderly patients had been significantly increased. It is a critical issue for health worker to provide a comprehensive, proactive health care in hospital, especially for those vulnerable patients who are unable to speak or behave for themselves. This study proposes an innovative, wearable RFID tag which embedded body temperature monitoring sensor, and equipped with automatic identification and localization, real-time emergency notification for health care workers. Additionally, operating with the intelligent backend system architecture, this system can also provide immediate physician advices in case if emergency situation happens without doctor near the site. The result of this study provides a ubiquitous medical care throughout whole hospital, and the new-invented tag may bring a significant change to normal health care process, especially in patient care.
{"title":"Design and implementation of wearable RFID tag for real-time ubiquitous medical care","authors":"Yeh-Cheng Chen, Hung-Min Sun, Ruey-Shun Chen","doi":"10.1109/BIOWIRELESS.2014.6827735","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827735","url":null,"abstract":"With the upcoming aging society and emerging of some newly discovered chronic diseases, the demand of hospital nursing for elderly patients had been significantly increased. It is a critical issue for health worker to provide a comprehensive, proactive health care in hospital, especially for those vulnerable patients who are unable to speak or behave for themselves. This study proposes an innovative, wearable RFID tag which embedded body temperature monitoring sensor, and equipped with automatic identification and localization, real-time emergency notification for health care workers. Additionally, operating with the intelligent backend system architecture, this system can also provide immediate physician advices in case if emergency situation happens without doctor near the site. The result of this study provides a ubiquitous medical care throughout whole hospital, and the new-invented tag may bring a significant change to normal health care process, especially in patient care.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131366757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827740
Yiran Li, Guochao Wang, Changzhan Gu, Changzhi Li
Doppler radar has the capability to remotely monitor human respiration. However, in real applications random body movements during measurement will cause drift of “DC” level in the experiment results. Also, the dc level will shift slowly with the temperature change of the radar circuit. Those DC drifts will cause inaccurate measurement results. To solve the dc drift issue during the experiments, an automatic DC-correction algorithm is developed. Experiment results show that this algorithm eliminates undesirable DC drifts and offset while recovering useful information of the original respiration signal. It is able to provide reliable respiration measurement even if there are large body movements that otherwise overwhelm the desired signal.
{"title":"Movement-immune respiration monitoring using automatic DC-correction algorithm for CW Doppler radar system","authors":"Yiran Li, Guochao Wang, Changzhan Gu, Changzhi Li","doi":"10.1109/BIOWIRELESS.2014.6827740","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827740","url":null,"abstract":"Doppler radar has the capability to remotely monitor human respiration. However, in real applications random body movements during measurement will cause drift of “DC” level in the experiment results. Also, the dc level will shift slowly with the temperature change of the radar circuit. Those DC drifts will cause inaccurate measurement results. To solve the dc drift issue during the experiments, an automatic DC-correction algorithm is developed. Experiment results show that this algorithm eliminates undesirable DC drifts and offset while recovering useful information of the original respiration signal. It is able to provide reliable respiration measurement even if there are large body movements that otherwise overwhelm the desired signal.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124925020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827725
P. Soh, G. Vandenbosch, F. H. Wee, M. Mercuri, A. van den Bosch, M. Martínez-Vázquez, D. Schreurs
This work presents a systematic investigation of the Specific Absorption Rate (SAR) of two ultra wideband (UWB) textile antennas. These popular UWB topologies are implemented using similar materials and evaluated at a common frequency point for comparison purposes in a certified SAR facility. Evaluations indicate that the antenna ground plane area and the distance to the body phantom also seriously affects SAR levels. This evaluation has also quantified the SAR measurement repeatability at various distances at a maximum of 10 %.
{"title":"SAR evaluation of ultra wideband (UWB) textile antennas","authors":"P. Soh, G. Vandenbosch, F. H. Wee, M. Mercuri, A. van den Bosch, M. Martínez-Vázquez, D. Schreurs","doi":"10.1109/BIOWIRELESS.2014.6827725","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827725","url":null,"abstract":"This work presents a systematic investigation of the Specific Absorption Rate (SAR) of two ultra wideband (UWB) textile antennas. These popular UWB topologies are implemented using similar materials and evaluated at a common frequency point for comparison purposes in a certified SAR facility. Evaluations indicate that the antenna ground plane area and the distance to the body phantom also seriously affects SAR levels. This evaluation has also quantified the SAR measurement repeatability at various distances at a maximum of 10 %.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123740882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827739
Hao Jiang, Ben Lariviere, Di Lan, Junmin Zhang, Jing Wang, R. Fechter, M. Harrison, Shuvo Roy
Providing electrical power to an implantable microelectronic device (IMD) via wireless power transfer technology is critical to implant's efficacy. The inductive coupling based wireless power transfer technology has been the primary approach to remotely power an IMD [1]. Reducing the coil size and improving efficiency are the two primary design goals for the power harvesting component in an IMD. A pulse-width-modulated (PWM) boost converter has been demonstrated to efficiently convert the low-voltage (much less than the regular diode's turn-on voltage) AC power generated by a miniaturized receiving coil to a desired high-voltage DC power [2]. In [2], the switching frequency of the PWM is much higher than the frequency of the input AC power. The high switching frequency not only dissipates more power during the switching, which deteriorates the converter's overall efficiency, but also prevents the circuit from handling the high-frequency input AC power. In this paper, a low switching frequency AC to DC boost converter is demonstrated. By aligning the PWM signal with the input AC, the boost converter is able to convert the AC power, whose amplitude is 500 mV at the open-circuit condition, to a >5 V DC output. The converter demonstrated in this paper has the potential to significantly improve the conversion efficiency by reducing the dissipated power associated with the PWM switch, especially when the input AC is at higher frequencies.
{"title":"A low switching frequency AC-DC boost converter for wireless powered miniaturized implants","authors":"Hao Jiang, Ben Lariviere, Di Lan, Junmin Zhang, Jing Wang, R. Fechter, M. Harrison, Shuvo Roy","doi":"10.1109/BIOWIRELESS.2014.6827739","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827739","url":null,"abstract":"Providing electrical power to an implantable microelectronic device (IMD) via wireless power transfer technology is critical to implant's efficacy. The inductive coupling based wireless power transfer technology has been the primary approach to remotely power an IMD [1]. Reducing the coil size and improving efficiency are the two primary design goals for the power harvesting component in an IMD. A pulse-width-modulated (PWM) boost converter has been demonstrated to efficiently convert the low-voltage (much less than the regular diode's turn-on voltage) AC power generated by a miniaturized receiving coil to a desired high-voltage DC power [2]. In [2], the switching frequency of the PWM is much higher than the frequency of the input AC power. The high switching frequency not only dissipates more power during the switching, which deteriorates the converter's overall efficiency, but also prevents the circuit from handling the high-frequency input AC power. In this paper, a low switching frequency AC to DC boost converter is demonstrated. By aligning the PWM signal with the input AC, the boost converter is able to convert the AC power, whose amplitude is 500 mV at the open-circuit condition, to a >5 V DC output. The converter demonstrated in this paper has the potential to significantly improve the conversion efficiency by reducing the dissipated power associated with the PWM switch, especially when the input AC is at higher frequencies.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133179157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827724
M. Tofighi, Shi-Min Huang
Most attentions regarding the performance of implantable antennas have been paid to the reflection coefficient (S11 with respect to 50 Ω), bandwidth, and far-field radiation pattern, while little effort has been dedicated to investigate the radiation efficiency during the implant design process. Analysis of two slot-type (annular and meandered) and two strip-type (ring and meandered PIFA) antennas embedded in muscle is presented in this paper at 2.4 GHz ISM band. It reveals that the slot types have superior performance in terms of their radiation efficiency. Also, the radiation efficiency is improved by operating away from the resonance, mostly where the admittance is inductive. The radiation efficiency may vary over an order of magnitude or more depending on the choice of the antenna and its resonance point, a fact that deserves further attention.
{"title":"Radiation efficiency of planar implantable antennas at ISM band","authors":"M. Tofighi, Shi-Min Huang","doi":"10.1109/BIOWIRELESS.2014.6827724","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827724","url":null,"abstract":"Most attentions regarding the performance of implantable antennas have been paid to the reflection coefficient (S11 with respect to 50 Ω), bandwidth, and far-field radiation pattern, while little effort has been dedicated to investigate the radiation efficiency during the implant design process. Analysis of two slot-type (annular and meandered) and two strip-type (ring and meandered PIFA) antennas embedded in muscle is presented in this paper at 2.4 GHz ISM band. It reveals that the slot types have superior performance in terms of their radiation efficiency. Also, the radiation efficiency is improved by operating away from the resonance, mostly where the admittance is inductive. The radiation efficiency may vary over an order of magnitude or more depending on the choice of the antenna and its resonance point, a fact that deserves further attention.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128331928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827738
B. Venema, Matthias Simon Wolke, V. Blazek, S. Leonhardt
An unobtrusive, mobile in-ear pulse oximeter for body sensor network with predictive power-management optimization algorithm is presented. The system can be connected via Bluetooth to a smartphone for online visualization of vital signs, recording or telemonitoring via UMTS (Universal Mobile Telecommunications System). The work focuses on energy saving strategies. Main part of the work is a significant reduction of the PPG-on-time by means of a real-time heart rate estimation routine. The concept is tested on sleep apnea patients with 96.8 % correct estimated heart events at a mean power consumption of 103 mW.
{"title":"A power consumption optimized reflective in-ear pulse oximeter for mobile health monitoring","authors":"B. Venema, Matthias Simon Wolke, V. Blazek, S. Leonhardt","doi":"10.1109/BIOWIRELESS.2014.6827738","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827738","url":null,"abstract":"An unobtrusive, mobile in-ear pulse oximeter for body sensor network with predictive power-management optimization algorithm is presented. The system can be connected via Bluetooth to a smartphone for online visualization of vital signs, recording or telemonitoring via UMTS (Universal Mobile Telecommunications System). The work focuses on energy saving strategies. Main part of the work is a significant reduction of the PPG-on-time by means of a real-time heart rate estimation routine. The concept is tested on sleep apnea patients with 96.8 % correct estimated heart events at a mean power consumption of 103 mW.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"40 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131471818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827737
D. Teichmann, Thorsten Bartelt, S. Leonhardt, M. Walter
This paper presents a novel device for cardiac output monitoring based on electromagnetic coupling between the sensor and the thoracic tissue. The device works in a noncontact way and is integrated into a shirt. Since the device is wearable, mobile, wireless, and easily operated, it would allow the incorporation of cardiac output measurements into home monitoring systems.
{"title":"A mobile and wireless approach for cardiac output monitoring","authors":"D. Teichmann, Thorsten Bartelt, S. Leonhardt, M. Walter","doi":"10.1109/BIOWIRELESS.2014.6827737","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827737","url":null,"abstract":"This paper presents a novel device for cardiac output monitoring based on electromagnetic coupling between the sensor and the thoracic tissue. The device works in a noncontact way and is integrated into a shirt. Since the device is wearable, mobile, wireless, and easily operated, it would allow the incorporation of cardiac output measurements into home monitoring systems.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"24 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120841802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/BIOWIRELESS.2014.6827731
F. L. Cabrera, F. R. de Sousa
This paper presents a method for optimal design of inductive links using geometric programming. The optimization proposed allows the inclusion of all geometric and electric constraints associated to the link. As an example, we design the dimensions of the primary inductor and frequency when the secondary inductor has a diameter of 4 mm. The set of inductors designed for a distance of 15 mm was implemented. The maximum efficiency measured is 30% at 415 MHz, which agrees with the expected values.
{"title":"Optimal design of energy efficient inductive links for powering implanted devices","authors":"F. L. Cabrera, F. R. de Sousa","doi":"10.1109/BIOWIRELESS.2014.6827731","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827731","url":null,"abstract":"This paper presents a method for optimal design of inductive links using geometric programming. The optimization proposed allows the inclusion of all geometric and electric constraints associated to the link. As an example, we design the dimensions of the primary inductor and frequency when the secondary inductor has a diameter of 4 mm. The set of inductors designed for a distance of 15 mm was implemented. The maximum efficiency measured is 30% at 415 MHz, which agrees with the expected values.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123879545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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