Pub Date : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239449
B. Patella, R. Russo, G. Aiello, C. Sunseri, R. Inguanta
Nitrogen, in the forms of nitrate (NO3-), nitrite, or ammonium, is a nutrient needed for plant growth and it is a common constituent of fertilizers [1]. When fertilizers are overused, they contaminate the ground water and then the food chain. For humans, a low level of nitrate is advisable because it increases the blood flow and has a good effect on both blood pressure and cardiovascular system. On the contrary, a high concentration of nitrate can be dangerous for humans. Nitrate ions undergoes different chemical transformations (i.e. to nitrite ions by Escherichia coli) producing different nitrogen-based compound such as nitrite ions, nitric oxide and ammonia [2]. These chemicals lead to several problems such as cancer, neurodegenerative disease and gastritis. Furthermore, nitrate ions are responsible of the blu-baby disease because they oxide hemoblogin to methemoglobine which has a lower capability to transport oxygen [3]–[4]. Considering all these hazards, the Environmental Protection Agency (EPA) has fixed the maximum allowed concentration of nitrates in drinking water to 44 ppm [5]. Nowadays, nitrate ions quantification is performed by spectroscopy ensuring Limit Of Detection (LOD) in the ppb range [6]–[7]. However, this technique consists of hard procedure (conversion of nitrates to nitrite using cadmium or zinc salts) and requires skilled personnel. Furthermore, it lacks of sensitivity when coloured or opaque samples are analysed. Such disadvantages confine this technique to a lab-based analysis making impossible to detect nitrate ions in real time and/or in situ.
{"title":"Vertical standing copper nanowires for electrochemical sensor of nitrate in water","authors":"B. Patella, R. Russo, G. Aiello, C. Sunseri, R. Inguanta","doi":"10.1109/FLEPS49123.2020.9239449","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239449","url":null,"abstract":"Nitrogen, in the forms of nitrate (NO3-), nitrite, or ammonium, is a nutrient needed for plant growth and it is a common constituent of fertilizers [1]. When fertilizers are overused, they contaminate the ground water and then the food chain. For humans, a low level of nitrate is advisable because it increases the blood flow and has a good effect on both blood pressure and cardiovascular system. On the contrary, a high concentration of nitrate can be dangerous for humans. Nitrate ions undergoes different chemical transformations (i.e. to nitrite ions by Escherichia coli) producing different nitrogen-based compound such as nitrite ions, nitric oxide and ammonia [2]. These chemicals lead to several problems such as cancer, neurodegenerative disease and gastritis. Furthermore, nitrate ions are responsible of the blu-baby disease because they oxide hemoblogin to methemoglobine which has a lower capability to transport oxygen [3]–[4]. Considering all these hazards, the Environmental Protection Agency (EPA) has fixed the maximum allowed concentration of nitrates in drinking water to 44 ppm [5]. Nowadays, nitrate ions quantification is performed by spectroscopy ensuring Limit Of Detection (LOD) in the ppb range [6]–[7]. However, this technique consists of hard procedure (conversion of nitrates to nitrite using cadmium or zinc salts) and requires skilled personnel. Furthermore, it lacks of sensitivity when coloured or opaque samples are analysed. Such disadvantages confine this technique to a lab-based analysis making impossible to detect nitrate ions in real time and/or in situ.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123022322","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239552
Shahid Malik, Laxmeesha Somappa, Meraj Ahmad, S. Sonkusale, M. Baghini
A simple, low cost, screen-printed flexible capacitive sensor for moisture, and water level detection is presented in this paper. The sensor is fabricated on the flexible polyamide substrate. The interdigitated structure electrodes are screen printed on the substrate to form the capacitive fingers using carbon paste. The relative permittivity of the medium changes due to the water vapors on the sensor, which in turn changes the capacitance of the sensor due to the fringing field. A novel auto-nulling based signal conditioning circuit was utilized to measure the capacitance of the sensor. The flexible nature of the sensor enhances the use of the fabricated capacitive sensor in applications such as diaper wetness monitoring, soil moisture monitoring, body hydration monitoring.
{"title":"A Fringing Field Based Screen-Printed Flexible Capacitive Moisture and Water Level Sensor","authors":"Shahid Malik, Laxmeesha Somappa, Meraj Ahmad, S. Sonkusale, M. Baghini","doi":"10.1109/FLEPS49123.2020.9239552","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239552","url":null,"abstract":"A simple, low cost, screen-printed flexible capacitive sensor for moisture, and water level detection is presented in this paper. The sensor is fabricated on the flexible polyamide substrate. The interdigitated structure electrodes are screen printed on the substrate to form the capacitive fingers using carbon paste. The relative permittivity of the medium changes due to the water vapors on the sensor, which in turn changes the capacitance of the sensor due to the fringing field. A novel auto-nulling based signal conditioning circuit was utilized to measure the capacitance of the sensor. The flexible nature of the sensor enhances the use of the fabricated capacitive sensor in applications such as diaper wetness monitoring, soil moisture monitoring, body hydration monitoring.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115823678","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239547
A. K. Bose, D. Maddipatla, X. Zhang, M. Panahi, S. Masihi, B. B. Narakathu, B. Bazuin, M. Atashbar
A printed strain gauge based on silver/carbon composite was successfully fabricated and characterized for strain monitoring applications. The silver-carbon (Ag/C) composite ink was prepared by blending 81% wt. of silver with 19% wt. of carbon ink. The strain gauge was fabricated by screen printing Ag/C composite ink on a flexible and stretchable thermoplastic polyurethane (TPU) substrate in a meandering pattern to achieve a desired resistance of $sim 350 Omega$. The capability of the printed strain gauge to detect varying strains ranging from 0% to 5% was investigated. It was observed that the strain gauge had a linear response till 2.5% strain. At 2.5% of tensile strain a relative resistive change of 7.8% and a gauge factor of 3.1 was observed. However, as the strain increased beyond 2.5% the strain gauge had a non-linear response. It was observed that at a tensile strain of 5%, the strain gauge had a maximum relative resistive change of 285.6% resulting in 57.2 gauge factor. The results demonstrate that a screen-printed Ag/C composite ink-based strain gauge with on a TPU substrate can be utilized for strain monitoring. The electromechanical response of the fabricated strain gauge as a function of resistance is investigated and presented in this paper.
成功制备了一种基于银/碳复合材料的印刷应变片,并对其进行了表征,用于应变监测。采用81掺杂法制备银碳(Ag/C)复合油墨% wt. of silver with 19% wt. of carbon ink. The strain gauge was fabricated by screen printing Ag/C composite ink on a flexible and stretchable thermoplastic polyurethane (TPU) substrate in a meandering pattern to achieve a desired resistance of $sim 350 Omega$. The capability of the printed strain gauge to detect varying strains ranging from 0% to 5% was investigated. It was observed that the strain gauge had a linear response till 2.5% strain. At 2.5% of tensile strain a relative resistive change of 7.8% and a gauge factor of 3.1 was observed. However, as the strain increased beyond 2.5% the strain gauge had a non-linear response. It was observed that at a tensile strain of 5%, the strain gauge had a maximum relative resistive change of 285.6% resulting in 57.2 gauge factor. The results demonstrate that a screen-printed Ag/C composite ink-based strain gauge with on a TPU substrate can be utilized for strain monitoring. The electromechanical response of the fabricated strain gauge as a function of resistance is investigated and presented in this paper.
{"title":"Screen Printed Silver/Carbon Composite Strain Gauge on a TPU Platform for Wearable Applications","authors":"A. K. Bose, D. Maddipatla, X. Zhang, M. Panahi, S. Masihi, B. B. Narakathu, B. Bazuin, M. Atashbar","doi":"10.1109/FLEPS49123.2020.9239547","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239547","url":null,"abstract":"A printed strain gauge based on silver/carbon composite was successfully fabricated and characterized for strain monitoring applications. The silver-carbon (Ag/C) composite ink was prepared by blending 81% wt. of silver with 19% wt. of carbon ink. The strain gauge was fabricated by screen printing Ag/C composite ink on a flexible and stretchable thermoplastic polyurethane (TPU) substrate in a meandering pattern to achieve a desired resistance of $sim 350 Omega$. The capability of the printed strain gauge to detect varying strains ranging from 0% to 5% was investigated. It was observed that the strain gauge had a linear response till 2.5% strain. At 2.5% of tensile strain a relative resistive change of 7.8% and a gauge factor of 3.1 was observed. However, as the strain increased beyond 2.5% the strain gauge had a non-linear response. It was observed that at a tensile strain of 5%, the strain gauge had a maximum relative resistive change of 285.6% resulting in 57.2 gauge factor. The results demonstrate that a screen-printed Ag/C composite ink-based strain gauge with on a TPU substrate can be utilized for strain monitoring. The electromechanical response of the fabricated strain gauge as a function of resistance is investigated and presented in this paper.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124372471","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239543
Sasikumar Arumugam, Yi Li, James E Pearce, D. Harrowven, M. Charlton, J. Tudor, S. Beeby
In this article, we report the fabrication of LECs on wearable textile substrates. The standard polyester cotton woven textile substrate is smoothed by screen-printing the polyurethane layer that is then UV cured. Solution processable spray coating method is utilised to deposit all functional layers including top and bottom electrodes. The spray coating is performed inside the nitrogen filled glove box to avoid exposure of the ambient air. The LECs are fabricated on ITO glass substrates with the same process parameters as a reference device. Finally, the devices were sealed using encapsulation polymer and tested in the ambient air conditions.
{"title":"Spray Coated Light Emitting Electrochemical Cells on Standard Polyester Cotton Woven Textiles","authors":"Sasikumar Arumugam, Yi Li, James E Pearce, D. Harrowven, M. Charlton, J. Tudor, S. Beeby","doi":"10.1109/FLEPS49123.2020.9239543","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239543","url":null,"abstract":"In this article, we report the fabrication of LECs on wearable textile substrates. The standard polyester cotton woven textile substrate is smoothed by screen-printing the polyurethane layer that is then UV cured. Solution processable spray coating method is utilised to deposit all functional layers including top and bottom electrodes. The spray coating is performed inside the nitrogen filled glove box to avoid exposure of the ambient air. The LECs are fabricated on ITO glass substrates with the same process parameters as a reference device. Finally, the devices were sealed using encapsulation polymer and tested in the ambient air conditions.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"09 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127448581","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239497
M. Vinchurkar, Rajul S. Patkar, M. Ashwin, M. Baghini, V. Rao
In this work, we demonstrate the development of a Microlectromechanical system (MEMS) based, cleanroom free fabricated, piezoresistive hydrogen sulfide (H2 S) gas sensor using a flexible polyethylene terephthalate (PET) substrate. This relatively cheap, simple to use, calibration-free sensor is highly sensitive, selective and operates at ambient conditions of temperature and humidity. This gas sensor would be ideal for agricultural applications where farmers are at risk for exposure to toxic gases, particularly H2 S exposure in manure pits and livestock work.
{"title":"MEMS based polymeric H2 S gas sensor for agricultural applications","authors":"M. Vinchurkar, Rajul S. Patkar, M. Ashwin, M. Baghini, V. Rao","doi":"10.1109/FLEPS49123.2020.9239497","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239497","url":null,"abstract":"In this work, we demonstrate the development of a Microlectromechanical system (MEMS) based, cleanroom free fabricated, piezoresistive hydrogen sulfide (H2 S) gas sensor using a flexible polyethylene terephthalate (PET) substrate. This relatively cheap, simple to use, calibration-free sensor is highly sensitive, selective and operates at ambient conditions of temperature and humidity. This gas sensor would be ideal for agricultural applications where farmers are at risk for exposure to toxic gases, particularly H2 S exposure in manure pits and livestock work.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133525779","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239478
Prakash Karipoth, R. Dahiya
Printed strain sensors are on high demand for flexible electronics and smart wearables. They are expected to exhibit high Figure of merits in terms of sensitivity, reliability, cost effectiveness, ease of fabrication etc. However, it is challenging to meet these attributes simultaneously. In this paper, we present a simple yet efficient method to fabricate the printed piezoresistive strain sensors with composite of carbon-based and silver-based pastes. The composite paste containing 80% and 20% by volume of carbon and silver paste was printed on poly vinyl chloride (PVC) substrate to realize the piezoresistive strain sensor over an area of 20 mm x 2 mm. The electromechanical characterization of the sensor demonstrated sensitivity of the order of 80% ($Delta$R/R) with good repeatability and stability. The piezoresistive behaviour of presented printed composite material is owing to the modulation of electrical conductivity and conduction path by the minor inclusion of highly conductive silver fillers in a slightly less conductive carbon matrix. Finally, the strain sensor was integrated on the finger of a vinyl glove and response was monitored with finger movements. The obtained results point towards the potential use of the sensor for flexible electronics, robotics and smart wearable devices.
印刷应变传感器对柔性电子产品和智能可穿戴设备的需求很高。它们有望在灵敏度、可靠性、成本效益、易于制造等方面表现出很高的优点。然而,同时满足这些属性是具有挑战性的。本文提出了一种简单而有效的碳基和银基复合材料印刷压阻应变传感器的制备方法。在聚氯乙烯(PVC)衬底上印刷了含有80%和20%体积碳和银的复合浆料,实现了面积为20mm x 2mm的压阻式应变传感器。该传感器的机电特性表明,灵敏度为80% ($Delta$R/R),具有良好的重复性和稳定性。所提出的印刷复合材料的压阻行为是由于电导率和传导路径的调制,通过少量的高导电性银填料在导电性稍差的碳基体中。最后,将应变传感器集成在乙烯基手套的手指上,并通过手指的运动来监测响应。获得的结果指向了传感器在柔性电子、机器人和智能可穿戴设备上的潜在应用。
{"title":"Printed Piezoresistive Strain sensors for Wearable Systems","authors":"Prakash Karipoth, R. Dahiya","doi":"10.1109/FLEPS49123.2020.9239478","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239478","url":null,"abstract":"Printed strain sensors are on high demand for flexible electronics and smart wearables. They are expected to exhibit high Figure of merits in terms of sensitivity, reliability, cost effectiveness, ease of fabrication etc. However, it is challenging to meet these attributes simultaneously. In this paper, we present a simple yet efficient method to fabricate the printed piezoresistive strain sensors with composite of carbon-based and silver-based pastes. The composite paste containing 80% and 20% by volume of carbon and silver paste was printed on poly vinyl chloride (PVC) substrate to realize the piezoresistive strain sensor over an area of 20 mm x 2 mm. The electromechanical characterization of the sensor demonstrated sensitivity of the order of 80% ($Delta$R/R) with good repeatability and stability. The piezoresistive behaviour of presented printed composite material is owing to the modulation of electrical conductivity and conduction path by the minor inclusion of highly conductive silver fillers in a slightly less conductive carbon matrix. Finally, the strain sensor was integrated on the finger of a vinyl glove and response was monitored with finger movements. The obtained results point towards the potential use of the sensor for flexible electronics, robotics and smart wearable devices.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134099545","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239533
Ayoub Zumeit, D. Shakthivel, R. Dahiya
This paper presents the fabrication and characterization of transfer printed Si nanoribbons (NRs) based field effect transistor (NRFETs). The critical steps such as high-k gate dielectric (silicon nitride (SiN)) were carried out at room temperature (RT), by using inductively coupled plasma chemical vapour deposition (ICP-CVD) method. The presented device exhibit mobility (~ 656 cm2 V−1.s−1) and On/Off ratio (>106) at par with conventional Si devices. The fabricated flexible Si NRFETs were evaluated under multiple bending cycles (~100) and the performance was found to be stable. The presented approach demonstrates the potential for direct printing of high performance flexible electronics.
{"title":"Si Nanoribbons based High Performance Printed FETs using Room-Temperature deposited Dielectric","authors":"Ayoub Zumeit, D. Shakthivel, R. Dahiya","doi":"10.1109/FLEPS49123.2020.9239533","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239533","url":null,"abstract":"This paper presents the fabrication and characterization of transfer printed Si nanoribbons (NRs) based field effect transistor (NRFETs). The critical steps such as high-k gate dielectric (silicon nitride (SiN)) were carried out at room temperature (RT), by using inductively coupled plasma chemical vapour deposition (ICP-CVD) method. The presented device exhibit mobility (~ 656 cm2 V−1.s−1) and On/Off ratio (>106) at par with conventional Si devices. The fabricated flexible Si NRFETs were evaluated under multiple bending cycles (~100) and the performance was found to be stable. The presented approach demonstrates the potential for direct printing of high performance flexible electronics.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134232193","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239515
P. Escobedo, Libu Manjakkal, M. Ntagios, R. Dahiya
This paper presents a miniaturized potentiostat readout circuit patch developed for electrochemical or biosensors. The presented patch has been fabricated on a flexible polyimide substrate using off-the-shelf electronics. In contrast to the traditional bulky equipment for electrochemical analysis, the presented patch is conformable and portable. As a proof of concept, the system has been used for pH measurements in buffer solution (6- 8 pH values) with a printed thick film potentiometric pH sensor having platinum counter electrode. The obtained results are in line with a commercially available potentiostat that has been used for benchmarking.
{"title":"Flexible Potentiostat Readout Circuit Patch for Electrochemical and Biosensor Applications","authors":"P. Escobedo, Libu Manjakkal, M. Ntagios, R. Dahiya","doi":"10.1109/FLEPS49123.2020.9239515","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239515","url":null,"abstract":"This paper presents a miniaturized potentiostat readout circuit patch developed for electrochemical or biosensors. The presented patch has been fabricated on a flexible polyimide substrate using off-the-shelf electronics. In contrast to the traditional bulky equipment for electrochemical analysis, the presented patch is conformable and portable. As a proof of concept, the system has been used for pH measurements in buffer solution (6- 8 pH values) with a printed thick film potentiometric pH sensor having platinum counter electrode. The obtained results are in line with a commercially available potentiostat that has been used for benchmarking.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114787529","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239562
A. Komolafe, Helga Nunes-Matos, M. Glanc-Gostkiewicz, R. Torah
To achieve durable printed circuits on textiles, it is necessary to print low-cost polymer films that interface the fabric with the printed circuit. The film smooths the surface of the fabric to enable the printing of thin and flexible conductive films on the fabric. When printed, the thickness of the polymer films can dominate the fabric and limit the flexibility of the printed e-textile. This paper investigates the reduction of the polymer film thickness for printed and wearable e-textiles by controlling the thread count of the fabric using different blends of polyester/silk/cotton fabrics. A $50 mu mathrm{m}$ thick polyurethane interface layer with a surface roughness, Ra value of $1.7 mu mathrm{m}$ is reported on a 100% plain weave polyester fabric. The PU thickness is 4 times less than the state of the art and shows more than 80 % reduction in the proportion of interface material to fabric thickness of the printed e-textile. This minimizes the impact of the printed film on the fabric.
为了在纺织品上实现耐用的印刷电路,有必要印刷低成本的聚合物薄膜,使织物与印刷电路相连接。该薄膜使织物表面光滑,从而能够在织物上印刷薄而柔韧的导电薄膜。印刷时,聚合物薄膜的厚度会支配织物,并限制印刷电子纺织品的柔韧性。本文研究了通过控制涤纶/真丝/棉织物不同混纺织物的支数来减少印花和可穿戴电子纺织品的聚合物膜厚度。在100%平纹涤纶织物上制备了一层50 mu mathrm{m}$厚的表面粗糙度为1.7 mu mathrm{m}$的聚氨酯界面层。PU厚度比目前的技术水平少4倍,并且显示印刷电子纺织品的界面材料占织物厚度的比例减少了80%以上。这样可以最大限度地减少印刷膜对织物的影响。
{"title":"Influence of textile structure on the wearability of printed e-textiles","authors":"A. Komolafe, Helga Nunes-Matos, M. Glanc-Gostkiewicz, R. Torah","doi":"10.1109/FLEPS49123.2020.9239562","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239562","url":null,"abstract":"To achieve durable printed circuits on textiles, it is necessary to print low-cost polymer films that interface the fabric with the printed circuit. The film smooths the surface of the fabric to enable the printing of thin and flexible conductive films on the fabric. When printed, the thickness of the polymer films can dominate the fabric and limit the flexibility of the printed e-textile. This paper investigates the reduction of the polymer film thickness for printed and wearable e-textiles by controlling the thread count of the fabric using different blends of polyester/silk/cotton fabrics. A $50 mu mathrm{m}$ thick polyurethane interface layer with a surface roughness, Ra value of $1.7 mu mathrm{m}$ is reported on a 100% plain weave polyester fabric. The PU thickness is 4 times less than the state of the art and shows more than 80 % reduction in the proportion of interface material to fabric thickness of the printed e-textile. This minimizes the impact of the printed film on the fabric.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126408914","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239563
Chaoming Fang, Yixuan Wang, Shuo Gao
Benefiting from the development of the Internet of Healthcare Things (IoHT) in recent years, locomotion mode recognition using wearable sensors plays an important role in the field of in-home rehabilitation. In this paper, a smart sensing system utilizing flexible electromyography (EMG) sensors and ground reaction force (GRF) sensors for locomotion mode recognition is presented, together with its use under the IoHT architecture. EMG and GRF information from ten healthy subjects in five common locomotion modes in daily life were collected, analyzed, and then transmitted to remote end terminals (e.g., personal computers). The data analysis process was implemented with machine learning techniques (Support Vector Machine), through which the locomotion modes were determined with a high accuracy of 96.38%. This article demonstrates a feasible means for accurate locomotion mode recognition by combining wearable sensing techniques and the machine learning algorithm, potentially advancing the development for IoHT based in-home rehabilitation.
{"title":"Utilizing Wearable GRF and EMG Sensing System and Machine Learning Algorithms to Enable Locomotion Mode Recognition for In-home Rehabilitation","authors":"Chaoming Fang, Yixuan Wang, Shuo Gao","doi":"10.1109/FLEPS49123.2020.9239563","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239563","url":null,"abstract":"Benefiting from the development of the Internet of Healthcare Things (IoHT) in recent years, locomotion mode recognition using wearable sensors plays an important role in the field of in-home rehabilitation. In this paper, a smart sensing system utilizing flexible electromyography (EMG) sensors and ground reaction force (GRF) sensors for locomotion mode recognition is presented, together with its use under the IoHT architecture. EMG and GRF information from ten healthy subjects in five common locomotion modes in daily life were collected, analyzed, and then transmitted to remote end terminals (e.g., personal computers). The data analysis process was implemented with machine learning techniques (Support Vector Machine), through which the locomotion modes were determined with a high accuracy of 96.38%. This article demonstrates a feasible means for accurate locomotion mode recognition by combining wearable sensing techniques and the machine learning algorithm, potentially advancing the development for IoHT based in-home rehabilitation.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122743857","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}