Pub Date : 2020-10-25DOI: 10.1109/SENSORS47125.2020.9278940
Kian Kadan-Jamal, Aakash Jog, M. Sophocleous, Dayananda Desagani, Orian Teig-Sussholz, J. Georgiou, A. Avni, Y. Shacham-Diamand
This paper presents the dielectric behaviour of suspensions of tomato cells (MSK8) and tobacco cells (BY2) in Murashige and Skoog, and Phosphate Buffer solutions. The behaviour of various concentrations of such suspensions is studied over a wide range of frequencies (1 kHz to 20 GHz). A distinct trend is observed in the relation between cell concentration and the capacitance of the first dispersion (i.e. at low frequencies), whilst the capacitance of the second dispersion (at medium frequencies) shows a clear relationship with the medium used. As the concentration of the cells increases, the capacitance observed increases for both cell types in both media. Furthermore, the capacitance observed for the MSK8 cells is higher than that for the BY2 cells in both media; furthermore, the normalized impedance magnitude of the MSK8 cell suspensions at low frequencies is higher than that of the equivalent normalized impedance magnitude for BY2 cells. Finally, the capacitance corresponding to the second dispersion is higher in Phosphate Buffer solution compared to that in Murashige and Skoog solution.
{"title":"A Study on the Dielectric Behaviour of Plant Cell Suspensions using Wideband Electrical Impedance Spectroscopy (WB-EIS)","authors":"Kian Kadan-Jamal, Aakash Jog, M. Sophocleous, Dayananda Desagani, Orian Teig-Sussholz, J. Georgiou, A. Avni, Y. Shacham-Diamand","doi":"10.1109/SENSORS47125.2020.9278940","DOIUrl":"https://doi.org/10.1109/SENSORS47125.2020.9278940","url":null,"abstract":"This paper presents the dielectric behaviour of suspensions of tomato cells (MSK8) and tobacco cells (BY2) in Murashige and Skoog, and Phosphate Buffer solutions. The behaviour of various concentrations of such suspensions is studied over a wide range of frequencies (1 kHz to 20 GHz). A distinct trend is observed in the relation between cell concentration and the capacitance of the first dispersion (i.e. at low frequencies), whilst the capacitance of the second dispersion (at medium frequencies) shows a clear relationship with the medium used. As the concentration of the cells increases, the capacitance observed increases for both cell types in both media. Furthermore, the capacitance observed for the MSK8 cells is higher than that for the BY2 cells in both media; furthermore, the normalized impedance magnitude of the MSK8 cell suspensions at low frequencies is higher than that of the equivalent normalized impedance magnitude for BY2 cells. Finally, the capacitance corresponding to the second dispersion is higher in Phosphate Buffer solution compared to that in Murashige and Skoog solution.","PeriodicalId":338240,"journal":{"name":"2020 IEEE Sensors","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114755760","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 : 2020-10-25DOI: 10.1109/SENSORS47125.2020.9278794
S. Pourang, Debnath Maji, U. Sekhon, A. Gupta, M. Suster, P. Mohseni
This paper reports on the use of a microfluidic dielectric sensor, termed ClotChip, for monitoring the fibrin polymerization effects on whole blood coagulation. The ClotChip sensor readout captures the temporal variation in the normalized real part of the blood dielectric permittivity at 1MHz as it undergoes coagulation. A new readout parameter, Smax, is identified in the ClotChip readout curve, which represents the maximum permittivity slope after a permittivity peak is reached. Experiments based on ex vivo treatment of whole blood samples with H-Gly-Pro-Arg-Pro-OH (GPRP) – a fibrin-polymerization inhibitor – demonstrate that Smax decreases with increasing GPRP concentrations corresponding to higher levels of fibrin inhibition. Furthermore, Smax is shown to exhibit a strong positive correlation (Pearson’s r = 0.883, p < 0.001, n = 12) with the α-angle readout parameter of rotational thromboelastometry – a clinical, viscoelastometry-based, comprehensive assay of blood coagulation. This work shows the ClotChip potential as a point-of-care platform for rapid assessment of fibrin-polymerization defects and their impact on the overall hemostatic status.
本文报道了一种称为ClotChip的微流体介质传感器，用于监测纤维蛋白聚合对全血凝固的影响。ClotChip传感器读数捕捉血液介电常数在1MHz的归一化实部的时间变化，因为它经历凝固。在ClotChip读出曲线中确定了一个新的读出参数Smax，它表示达到介电常数峰值后的最大介电常数斜率。用纤维蛋白聚合抑制剂H-Gly-Pro-Arg-Pro-OH (GPRP)对全血样本进行体外处理的实验表明，Smax随着GPRP浓度的增加而降低，对应于更高水平的纤维蛋白抑制。此外，Smax显示出很强的正相关(Pearson’s r = 0.883, p < 0.001, n = 12)与旋转血栓弹性测量的α-角度读数参数-一种基于粘弹性测量的临床综合血液凝固分析。这项工作显示了ClotChip作为快速评估纤维蛋白聚合缺陷及其对整体止血状态影响的即时护理平台的潜力。
{"title":"Monitoring Fibrin Polymerization Effects on Whole Blood Coagulation Using a Microfluidic Dielectric Sensor","authors":"S. Pourang, Debnath Maji, U. Sekhon, A. Gupta, M. Suster, P. Mohseni","doi":"10.1109/SENSORS47125.2020.9278794","DOIUrl":"https://doi.org/10.1109/SENSORS47125.2020.9278794","url":null,"abstract":"This paper reports on the use of a microfluidic dielectric sensor, termed ClotChip, for monitoring the fibrin polymerization effects on whole blood coagulation. The ClotChip sensor readout captures the temporal variation in the normalized real part of the blood dielectric permittivity at 1MHz as it undergoes coagulation. A new readout parameter, Smax, is identified in the ClotChip readout curve, which represents the maximum permittivity slope after a permittivity peak is reached. Experiments based on ex vivo treatment of whole blood samples with H-Gly-Pro-Arg-Pro-OH (GPRP) – a fibrin-polymerization inhibitor – demonstrate that Smax decreases with increasing GPRP concentrations corresponding to higher levels of fibrin inhibition. Furthermore, Smax is shown to exhibit a strong positive correlation (Pearson’s r = 0.883, p < 0.001, n = 12) with the α-angle readout parameter of rotational thromboelastometry – a clinical, viscoelastometry-based, comprehensive assay of blood coagulation. This work shows the ClotChip potential as a point-of-care platform for rapid assessment of fibrin-polymerization defects and their impact on the overall hemostatic status.","PeriodicalId":338240,"journal":{"name":"2020 IEEE Sensors","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115131962","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 : 2020-10-25DOI: 10.1109/SENSORS47125.2020.9278689
Sheng-Kai Yeh, Chao-Chun Ning, C. Yeh, S. Tseng, Y. Juang, W. Fang
This study presents a simple approach to design and implement a solid-state micro tactile force sensor using the standard CMOS process (Fig. 1). By using the inductive sensing mechanism with the magnetic force contact interface and the CMOS on-chip analog circuit, the normal force is detected by the inductance change of the sensing coil and readout by characterizing the frequency variation of the LC tank oscillator. The proposed micro tactile force sensor has two major merits: (1) the fabrication process of the proposed tactile sensor is straightforward, and the fragile suspended structure is not required to detect the tactile load. Therefore, the process issues and the design concerns of the unwanted deformation induced by the residual stress of the CMOS thin films can be avoided. (2) Taking the advantages of the standard CMOS process (TSMC 1P6M CMOS process), the sensing component and the processing circuitry are monolithically integrated for direct signal processing with a better signal-to-noise ratio (SNR). The measurement results verify the feasibility and functionality of the proposed micro tactile sensor. For future perspectives, the proposed device can be exploited to the applications required compact tactile force sensing system. Moreover, more processing circuit components can be incorporated monolithically to provide more versatilities.
{"title":"CMOS Chip for Solid-State Tactile Force Sensor","authors":"Sheng-Kai Yeh, Chao-Chun Ning, C. Yeh, S. Tseng, Y. Juang, W. Fang","doi":"10.1109/SENSORS47125.2020.9278689","DOIUrl":"https://doi.org/10.1109/SENSORS47125.2020.9278689","url":null,"abstract":"This study presents a simple approach to design and implement a solid-state micro tactile force sensor using the standard CMOS process (Fig. 1). By using the inductive sensing mechanism with the magnetic force contact interface and the CMOS on-chip analog circuit, the normal force is detected by the inductance change of the sensing coil and readout by characterizing the frequency variation of the LC tank oscillator. The proposed micro tactile force sensor has two major merits: (1) the fabrication process of the proposed tactile sensor is straightforward, and the fragile suspended structure is not required to detect the tactile load. Therefore, the process issues and the design concerns of the unwanted deformation induced by the residual stress of the CMOS thin films can be avoided. (2) Taking the advantages of the standard CMOS process (TSMC 1P6M CMOS process), the sensing component and the processing circuitry are monolithically integrated for direct signal processing with a better signal-to-noise ratio (SNR). The measurement results verify the feasibility and functionality of the proposed micro tactile sensor. For future perspectives, the proposed device can be exploited to the applications required compact tactile force sensing system. Moreover, more processing circuit components can be incorporated monolithically to provide more versatilities.","PeriodicalId":338240,"journal":{"name":"2020 IEEE Sensors","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114682534","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 : 2020-10-25DOI: 10.1109/SENSORS47125.2020.9278623
G. Kaniak, W. Rohringer, M. Brauns, Nils Panzer, F. Lücking, B. Fischer, S. Brand, C. Große
In this paper three case studies of the application of a compact non-contact, non-destructive setup are presented. The herein employed method is based on the air-coupled detection of acoustic waves in the frequency range up to 2 MHz.
{"title":"Enhanced non-contact ultrasonic testing using an air-coupled optical microphone","authors":"G. Kaniak, W. Rohringer, M. Brauns, Nils Panzer, F. Lücking, B. Fischer, S. Brand, C. Große","doi":"10.1109/SENSORS47125.2020.9278623","DOIUrl":"https://doi.org/10.1109/SENSORS47125.2020.9278623","url":null,"abstract":"In this paper three case studies of the application of a compact non-contact, non-destructive setup are presented. The herein employed method is based on the air-coupled detection of acoustic waves in the frequency range up to 2 MHz.","PeriodicalId":338240,"journal":{"name":"2020 IEEE Sensors","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115081391","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 : 2020-10-25DOI: 10.1109/SENSORS47125.2020.9278589
I. Sobrón, I. Landa, I. Eizmendi, M. Vélez
In recent years, localization based on Ultra-Wide Band (UWB) systems has been widely used due to its good positioning performance. However, the system reliability can severely degrade in non-line-of-sight (NLOS) conditions since time of arrival (TOA) estimation is highly conditioned by the presence or absence of line of sight (LOS). This manuscript evaluates an adaptive TOA estimation scheme based on prior knowledge of LOS/NLOS for TDOA-based UWB positioning. Assuming previous identification of LOS/NLOS channels, two correlation-based approaches have been employed for TOA estimation. The adaptive scheme has been assessed in terms of horizontal position error for several LOS and NLOS scenarios. Additionally, the robustness of the adaptive proposal has been studied when employing noisy LOS/NLOS estimates. Simulation results show that the proposed flexible solution outperforms traditional positioning schemes in different channel conditions despite errors in the LOS/NLOS estimates.
{"title":"Adaptive TOA Estimation with Imperfect LOS and NLOS Knowledge in UWB Positioning Systems","authors":"I. Sobrón, I. Landa, I. Eizmendi, M. Vélez","doi":"10.1109/SENSORS47125.2020.9278589","DOIUrl":"https://doi.org/10.1109/SENSORS47125.2020.9278589","url":null,"abstract":"In recent years, localization based on Ultra-Wide Band (UWB) systems has been widely used due to its good positioning performance. However, the system reliability can severely degrade in non-line-of-sight (NLOS) conditions since time of arrival (TOA) estimation is highly conditioned by the presence or absence of line of sight (LOS). This manuscript evaluates an adaptive TOA estimation scheme based on prior knowledge of LOS/NLOS for TDOA-based UWB positioning. Assuming previous identification of LOS/NLOS channels, two correlation-based approaches have been employed for TOA estimation. The adaptive scheme has been assessed in terms of horizontal position error for several LOS and NLOS scenarios. Additionally, the robustness of the adaptive proposal has been studied when employing noisy LOS/NLOS estimates. Simulation results show that the proposed flexible solution outperforms traditional positioning schemes in different channel conditions despite errors in the LOS/NLOS estimates.","PeriodicalId":338240,"journal":{"name":"2020 IEEE Sensors","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117316888","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 : 2020-10-25DOI: 10.1109/SENSORS47125.2020.9278751
Chani Park, H. Yoon, Md. Abu Zahed, Jaeyeong Park
In this work, a highly conductive treated PEDOT:PSS (poly(3,4-ethylenedioxythiophene) : poly(styrene sulfonate)) layer was utilized for the transduction layer of an ion-selective flexible electrode (ISFE) and well-deposited on the carbon paste and polyethylene terephthalate (PET) substrate. The PEDOT:PSS was also treated by a co-solvent of ethylene glycol (EG) using bath-sonication to enhance electrical and electrochemical characteristics and finally coated with Ca2+ selective membrane cocktail. Electrochemical properties exhibited that EG treated PEDOT:PSS drop-casted ISFE achieves improved charge transport with remarkable electric conductivity enhancement. The fabricated Ca2+-ISFE was demonstrated a near-Nernst response of 31.9 mV/decade between 10-4 and 10-1 M with the rapid response (< 20 seconds). Moreover, the EG-treated PEDOT:PSS based ISFE proved significant potential stability with a negligible potential drift of 0.34 mV/min, compared to pristine PEDOT:PSS based ISFE (0.56 mV/min). Based on these analyses, it can be expected that the EG-treated PEDOT:PSS will pave the way for other bio-chemical compounds monitoring.
{"title":"A Highly Stable Ca2+ Ion-Selective Flexible Sensor Based on Treated PEDOT:PSS Transducing Layer","authors":"Chani Park, H. Yoon, Md. Abu Zahed, Jaeyeong Park","doi":"10.1109/SENSORS47125.2020.9278751","DOIUrl":"https://doi.org/10.1109/SENSORS47125.2020.9278751","url":null,"abstract":"In this work, a highly conductive treated PEDOT:PSS (poly(3,4-ethylenedioxythiophene) : poly(styrene sulfonate)) layer was utilized for the transduction layer of an ion-selective flexible electrode (ISFE) and well-deposited on the carbon paste and polyethylene terephthalate (PET) substrate. The PEDOT:PSS was also treated by a co-solvent of ethylene glycol (EG) using bath-sonication to enhance electrical and electrochemical characteristics and finally coated with Ca2+ selective membrane cocktail. Electrochemical properties exhibited that EG treated PEDOT:PSS drop-casted ISFE achieves improved charge transport with remarkable electric conductivity enhancement. The fabricated Ca2+-ISFE was demonstrated a near-Nernst response of 31.9 mV/decade between 10-4 and 10-1 M with the rapid response (< 20 seconds). Moreover, the EG-treated PEDOT:PSS based ISFE proved significant potential stability with a negligible potential drift of 0.34 mV/min, compared to pristine PEDOT:PSS based ISFE (0.56 mV/min). Based on these analyses, it can be expected that the EG-treated PEDOT:PSS will pave the way for other bio-chemical compounds monitoring.","PeriodicalId":338240,"journal":{"name":"2020 IEEE Sensors","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116412696","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 : 2020-10-25DOI: 10.1109/SENSORS47125.2020.9278923
L. Horsthemke, C. Bischoff, P. Glösekötter, B. Burchard, R. Staacke, J. Meijer
An improvement on a concept for all optical mag- netometry using nitrogen vacancies in diamond is presented. The concept is based on the fluorescence attenuation of optically pumped nitrogen vacancies by magnetic fields up to ≈ 50 mT. The attenuation is registered by modulating the pumping power to generate a constant signal at a photodetector. A sensitivity of $2.6mu {text{T}}/sqrt {{text{Hz}}} $ at a sampling frequency of 500 Hz is achieved.
{"title":"All optical readout scheme for photoluminescence based magnetic field sensors","authors":"L. Horsthemke, C. Bischoff, P. Glösekötter, B. Burchard, R. Staacke, J. Meijer","doi":"10.1109/SENSORS47125.2020.9278923","DOIUrl":"https://doi.org/10.1109/SENSORS47125.2020.9278923","url":null,"abstract":"An improvement on a concept for all optical mag- netometry using nitrogen vacancies in diamond is presented. The concept is based on the fluorescence attenuation of optically pumped nitrogen vacancies by magnetic fields up to ≈ 50 mT. The attenuation is registered by modulating the pumping power to generate a constant signal at a photodetector. A sensitivity of $2.6mu {text{T}}/sqrt {{text{Hz}}} $ at a sampling frequency of 500 Hz is achieved.","PeriodicalId":338240,"journal":{"name":"2020 IEEE Sensors","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123495106","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 : 2020-10-25DOI: 10.1109/SENSORS47125.2020.9278620
Tahmid Latif, Laura Gonzalez, J. Dieffenderfer, Yuwei Liao, M. Hernandez, V. Misra, E. Lobaton, A. Bozkurt
Multi-modal wearable sensors monitoring physiology and environment simultaneously would offer a great promise to manage respiratory health, especially for asthmatic patients. In this study, we present a preliminary investigation of the correlation between ozone exposure, heart rate, heart rate variability, and lung function. As the first step, we tested the effect of low-level ozone exposure in a sample size of four healthy individuals. Test subjects underwent controlled exposure from 0.06 to 0.08 ppm of ozone and filtered air on two separate exposure days. Our results indicate an increment in mean heart rate in three out of four test subjects when exposed to ozone. We have also observed that changes in mean heart rate has a positive correlation with changes in lung function and a negative correlation with changes in neutrophil count. These results provide a baseline understanding of healthy subjects as a control group.
{"title":"Preliminary Assessment of Human Biological Responses to Low-level Ozone","authors":"Tahmid Latif, Laura Gonzalez, J. Dieffenderfer, Yuwei Liao, M. Hernandez, V. Misra, E. Lobaton, A. Bozkurt","doi":"10.1109/SENSORS47125.2020.9278620","DOIUrl":"https://doi.org/10.1109/SENSORS47125.2020.9278620","url":null,"abstract":"Multi-modal wearable sensors monitoring physiology and environment simultaneously would offer a great promise to manage respiratory health, especially for asthmatic patients. In this study, we present a preliminary investigation of the correlation between ozone exposure, heart rate, heart rate variability, and lung function. As the first step, we tested the effect of low-level ozone exposure in a sample size of four healthy individuals. Test subjects underwent controlled exposure from 0.06 to 0.08 ppm of ozone and filtered air on two separate exposure days. Our results indicate an increment in mean heart rate in three out of four test subjects when exposed to ozone. We have also observed that changes in mean heart rate has a positive correlation with changes in lung function and a negative correlation with changes in neutrophil count. These results provide a baseline understanding of healthy subjects as a control group.","PeriodicalId":338240,"journal":{"name":"2020 IEEE Sensors","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123943103","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 : 2020-10-25DOI: 10.1109/SENSORS47125.2020.9278812
Weijie Luo, D. Young
This paper presents the design, implementation, and characterization results of miniature, non-invasive, tail-cuff-based heart rate (HR) sensors for real-time laboratory mice monitoring. 3D-printed lightweight tail-cuffs incorporating MEMS piezo-resistive pressure sensors are developed to minimize animal stress. A tail-cuff design employing two pressure sensors is proposed to suppress differential motion artifacts. The prototype tail-cuff sensors have demonstrated the capability of detecting blood pressure (BP) pulse waveform from a laboratory mouse tail, from which HR and heart rate variability (HRV) can be obtained. Compared to a tail-cuff design employing one pressure sensor, the two-sensor tail-cuff design exhibits a maximum HR error of 4.9%, which is 16 times lower than that obtained from the one-sensor tail-cuff design. Further, a miniature wireless transmitter module is demonstrated to be suitable for BP pulse waveform telemetry.
{"title":"A Miniature Non-Invasive Wireless Tail-Cuff-Based Heart Rate Sensor With Motion Artifacts Suppression for Real-Time Monitoring of Laboratory Mice","authors":"Weijie Luo, D. Young","doi":"10.1109/SENSORS47125.2020.9278812","DOIUrl":"https://doi.org/10.1109/SENSORS47125.2020.9278812","url":null,"abstract":"This paper presents the design, implementation, and characterization results of miniature, non-invasive, tail-cuff-based heart rate (HR) sensors for real-time laboratory mice monitoring. 3D-printed lightweight tail-cuffs incorporating MEMS piezo-resistive pressure sensors are developed to minimize animal stress. A tail-cuff design employing two pressure sensors is proposed to suppress differential motion artifacts. The prototype tail-cuff sensors have demonstrated the capability of detecting blood pressure (BP) pulse waveform from a laboratory mouse tail, from which HR and heart rate variability (HRV) can be obtained. Compared to a tail-cuff design employing one pressure sensor, the two-sensor tail-cuff design exhibits a maximum HR error of 4.9%, which is 16 times lower than that obtained from the one-sensor tail-cuff design. Further, a miniature wireless transmitter module is demonstrated to be suitable for BP pulse waveform telemetry.","PeriodicalId":338240,"journal":{"name":"2020 IEEE Sensors","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125934653","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 : 2020-10-25DOI: 10.1109/SENSORS47125.2020.9278645
F. J. Romero, Inmaculada Ortiz-Gómez, A. Salinas, D. Morales, N. Rodríguez, A. Rivadeneyra
Laser reduced graphene oxide (LrGO) has been considered as temperature sensor and its thermal sensitivity has been studied as a function of the reduction laser power level. To do so, LrGO squares of 1 cm2 on a flexible substrate have been fabricated. We found that for the lower tested power (50 mW), both the nominal resistance (about 500 Ω) and temperature sensitivity (around -0.41 Ω/°C) are about 1.5 times higher than the values obtained with an increase in power of 10 mW. The sensor also presented a very linear response (higher than 0.99) and low variation with relative humidity (5 Ω in the RH range from 20% to 90%).
{"title":"Temperature sensing by Laser Reduced Graphene Oxide at different Laser Power Levels","authors":"F. J. Romero, Inmaculada Ortiz-Gómez, A. Salinas, D. Morales, N. Rodríguez, A. Rivadeneyra","doi":"10.1109/SENSORS47125.2020.9278645","DOIUrl":"https://doi.org/10.1109/SENSORS47125.2020.9278645","url":null,"abstract":"Laser reduced graphene oxide (LrGO) has been considered as temperature sensor and its thermal sensitivity has been studied as a function of the reduction laser power level. To do so, LrGO squares of 1 cm2 on a flexible substrate have been fabricated. We found that for the lower tested power (50 mW), both the nominal resistance (about 500 Ω) and temperature sensitivity (around -0.41 Ω/°C) are about 1.5 times higher than the values obtained with an increase in power of 10 mW. The sensor also presented a very linear response (higher than 0.99) and low variation with relative humidity (5 Ω in the RH range from 20% to 90%).","PeriodicalId":338240,"journal":{"name":"2020 IEEE Sensors","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125976218","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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