Pub Date : 2015-03-07DOI: 10.1109/ISPTS.2015.7220149
S. Mukherji
Summary form only given. An optical sensor is probably the most engaging areas of research at present, given the number of publications that come out in this area. Starting with simple optical fiber sensors for physical parameters such as temperature, strain, etc. to the more complex biosensing strategies, optical sensors promise immunity to electrical interferences, ease of manufacturing and easy acceptance from the user community. Although various complex bio/chemical sensors have been developed riding on the wave of nanotechnology, there are simple strategies to exploit nanoscale phenomena to develop powerful bio/chemical sensors. In the Biosensors and Bioinstrumentation (BSBI) lab of IIT Bombay, research is conducted on using modulations of the evanescent field on optical fibers or waveguides for chemical and biological sensing. This talk will concentrate on sensors developed using multimode optical fibers for detection of pathogens in water, proteins in serum and even trace explosive vapors in air. The sensitivity of these sensors canbeen improved by incorporating nanostructures (e.g. gold nanospheres, dendrimers, etc.) and polymers on the surface of the fibers.
{"title":"IT09. Nanoscale coatings on optical fibers for sensitivity and specificity enhancement","authors":"S. Mukherji","doi":"10.1109/ISPTS.2015.7220149","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220149","url":null,"abstract":"Summary form only given. An optical sensor is probably the most engaging areas of research at present, given the number of publications that come out in this area. Starting with simple optical fiber sensors for physical parameters such as temperature, strain, etc. to the more complex biosensing strategies, optical sensors promise immunity to electrical interferences, ease of manufacturing and easy acceptance from the user community. Although various complex bio/chemical sensors have been developed riding on the wave of nanotechnology, there are simple strategies to exploit nanoscale phenomena to develop powerful bio/chemical sensors. In the Biosensors and Bioinstrumentation (BSBI) lab of IIT Bombay, research is conducted on using modulations of the evanescent field on optical fibers or waveguides for chemical and biological sensing. This talk will concentrate on sensors developed using multimode optical fibers for detection of pathogens in water, proteins in serum and even trace explosive vapors in air. The sensitivity of these sensors canbeen improved by incorporating nanostructures (e.g. gold nanospheres, dendrimers, etc.) and polymers on the surface of the fibers.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"5 1","pages":"XIX-XIX"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73218101","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 : 2015-03-07DOI: 10.1109/ISPTS.2015.7220127
Umesh Yadav, Ravindra Sarje, A. Shaligram, S. Gangal
An electrochemical amperometric sensor measures the electric current on the surface of the working electrodes and estimates the concentration of chemical or biological species. Electrochemical sensor is fast and selective but electrochemical sensing is a complex phenomenon involving both physical and chemical processes. With a view to understand the basic operation of electrochemical sensor, present study demonstrates a steady-state analysis of the current drawn in a cell of electrolyte solution with two and three electrode configuration. Simulations are carried out for 2- dimensional geometry using COMSOL Multiphysics suite. Effect of variation in cell dimensions, electrolyte concentrations and electrode dimensions on the performance of the sensor is studied. For validation of simulation result, a two electrode electrochemical cell is fabricated and tested for NO2 gas sensing.
{"title":"Design, simulation, fabrication and testing of electrochemical NO2 gas sensor","authors":"Umesh Yadav, Ravindra Sarje, A. Shaligram, S. Gangal","doi":"10.1109/ISPTS.2015.7220127","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220127","url":null,"abstract":"An electrochemical amperometric sensor measures the electric current on the surface of the working electrodes and estimates the concentration of chemical or biological species. Electrochemical sensor is fast and selective but electrochemical sensing is a complex phenomenon involving both physical and chemical processes. With a view to understand the basic operation of electrochemical sensor, present study demonstrates a steady-state analysis of the current drawn in a cell of electrolyte solution with two and three electrode configuration. Simulations are carried out for 2- dimensional geometry using COMSOL Multiphysics suite. Effect of variation in cell dimensions, electrolyte concentrations and electrode dimensions on the performance of the sensor is studied. For validation of simulation result, a two electrode electrochemical cell is fabricated and tested for NO2 gas sensing.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"114 1","pages":"268-272"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77733624","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 : 2015-03-07DOI: 10.1109/ISPTS.2015.7220092
B. C. Keswani, R. Kambale, Y. D. Kolekar
Ferroelectric and piezoelectric properties of lead-free BaTiO3 (BT), Ba0.92Ca0.08TiO3 (BCT8) and Fe doped (~ 1.25, 1.5 and 2 wt. %) BCT8 electroceramics prepared by solid state reaction have been studied. X-ray diffraction results confirm the formation of tetragonal crystal lattice symmetry. All the samples exhibit typical polarization-electric field (P-E) hysteresis loop as well as strain-electric field (S-E) butterfly loop endorses the ferroelectric and piezoelectric nature, respectively. The ferroelectric (polarization) and piezoelectric (strain) properties of BCT 8 were observed to be suppressed with Fe doping. The 2 wt. % Fe doped BCT8 electroceramics shows the typical magnetization-magnetic field (M-H) hysteresis loop at room temperature evidences the presence of multiferroic nature.
{"title":"Ferroelectric and piezoelectric properties of Fe doped lead free BaTiO3-CaTiO3 electroceramics","authors":"B. C. Keswani, R. Kambale, Y. D. Kolekar","doi":"10.1109/ISPTS.2015.7220092","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220092","url":null,"abstract":"Ferroelectric and piezoelectric properties of lead-free BaTiO3 (BT), Ba0.92Ca0.08TiO3 (BCT8) and Fe doped (~ 1.25, 1.5 and 2 wt. %) BCT8 electroceramics prepared by solid state reaction have been studied. X-ray diffraction results confirm the formation of tetragonal crystal lattice symmetry. All the samples exhibit typical polarization-electric field (P-E) hysteresis loop as well as strain-electric field (S-E) butterfly loop endorses the ferroelectric and piezoelectric nature, respectively. The ferroelectric (polarization) and piezoelectric (strain) properties of BCT 8 were observed to be suppressed with Fe doping. The 2 wt. % Fe doped BCT8 electroceramics shows the typical magnetization-magnetic field (M-H) hysteresis loop at room temperature evidences the presence of multiferroic nature.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"51 1","pages":"102-105"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80834091","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 : 2015-03-07DOI: 10.1109/ISPTS.2015.7220143
A. Paul
Summary form only given. The non judicious application of a particular class of pesticides - organophosphates (OPs) to control agricultural pest has become a serious environmental issue leading to soil and subsequently surface & ground water pollution. The environmental concerns regarding persistence of organophosphates and toxic metabolites in soil and ground water has stimulated the research to develop rapid and sensitive bio-assay. Fluorescence-based biosensors have generated considerable interest over other biosensors as they allow the safe non electrical remote sensing of materials in hazardous or sensitive environments which derive an analytical signal from the fluorescence emission process. Recently, there has been an intense research effort to develop biosensor devices for the determination of organophosphorus pesticides (OPs) and Organophosphorus hydrolase (OPH), a biological catalyst, can effectively catalyze the hydrolysis of wide range of OPs resulting in the detection of these pesticides. Detection of OPs has been demonstrated by the conjugation of Organophosphorus hydrolase (OPH) and the fluorophorei.e 8-hydroxypyrene-1,3,6-trisulfonic acid (HPTS or pyranine). The hydrolysis of the OPs by the enzyme decreases the pH in its vicinity which is being detected by the pH reporter fluorophore. The fluorophorepyranine has excitation at 460 nm and emission at 510 nm which can be used as pH indicator in the pH range of 7-10 and this has been monitored by developing the associated instrumentation. Enhancement in fluorescence detection signal was observed when amine functionalized silver nanoparticles were covalently attached to OPH6His-pyranine conjugate due to `Metal Enhanced Fluorescence' which in turn has resulted in lower detection limits of ~ 2ppb for paraoxon which are much better as compared to other enzyme based biosensors for organophosphate pesticides. The enhancement in the sensitivity of the biosensing assay due to introduction of silver nanoparticles with amine group is because of the metal enhanced fluorescence and stability of the bond between AgNPs and bioconjugate comprising of OPH6His-pyranine. This opens the possibility of the assay to be used for rapid field detection for organophosphates and contributing towards preserving environment.
{"title":"IT03. Bio-nano sensing and instrumentation: Evolution and trends","authors":"A. Paul","doi":"10.1109/ISPTS.2015.7220143","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220143","url":null,"abstract":"Summary form only given. The non judicious application of a particular class of pesticides - organophosphates (OPs) to control agricultural pest has become a serious environmental issue leading to soil and subsequently surface & ground water pollution. The environmental concerns regarding persistence of organophosphates and toxic metabolites in soil and ground water has stimulated the research to develop rapid and sensitive bio-assay. Fluorescence-based biosensors have generated considerable interest over other biosensors as they allow the safe non electrical remote sensing of materials in hazardous or sensitive environments which derive an analytical signal from the fluorescence emission process. Recently, there has been an intense research effort to develop biosensor devices for the determination of organophosphorus pesticides (OPs) and Organophosphorus hydrolase (OPH), a biological catalyst, can effectively catalyze the hydrolysis of wide range of OPs resulting in the detection of these pesticides. Detection of OPs has been demonstrated by the conjugation of Organophosphorus hydrolase (OPH) and the fluorophorei.e 8-hydroxypyrene-1,3,6-trisulfonic acid (HPTS or pyranine). The hydrolysis of the OPs by the enzyme decreases the pH in its vicinity which is being detected by the pH reporter fluorophore. The fluorophorepyranine has excitation at 460 nm and emission at 510 nm which can be used as pH indicator in the pH range of 7-10 and this has been monitored by developing the associated instrumentation. Enhancement in fluorescence detection signal was observed when amine functionalized silver nanoparticles were covalently attached to OPH6His-pyranine conjugate due to `Metal Enhanced Fluorescence' which in turn has resulted in lower detection limits of ~ 2ppb for paraoxon which are much better as compared to other enzyme based biosensors for organophosphate pesticides. The enhancement in the sensitivity of the biosensing assay due to introduction of silver nanoparticles with amine group is because of the metal enhanced fluorescence and stability of the bond between AgNPs and bioconjugate comprising of OPH6His-pyranine. This opens the possibility of the assay to be used for rapid field detection for organophosphates and contributing towards preserving environment.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"30 1","pages":"IV-IV"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89680188","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 : 2015-03-07DOI: 10.1109/ISPTS.2015.7220087
S. Rastogi, B. Praveenkumar, P. Divya, Ashavani Kumar
In the current paper lead-free piezoelectric ceramics BNKT, [Bi0.5(Na0.85K0.15)0.5]1-xSrxTiO3 (where x=0, 0.02, 0.04, 0.06) are prepared by conventional solid state route. Calcination studies are carried out to optimize the properties. XRD studies are carried out to confirm the perovskite phase formation. The powders are prepared in the form of discs of 10 mm diameter and 1.0 mm thickness. Subsequently, compacted samples are sintered in the range of 1175 °C to 1200 °C to improve the density. The relative densities of all the samples are determined by first principle method. Poling dependence and stability of lead free BNKT ceramic system are investigated. The effect of Sr doping piezoelectric charge coefficient (d33), and coupling coefficient (Kp) are discussed in detail. Dielectric properties are studied by varying strontium content. Partial doping of Sr on BNKT ceramic improved the piezoelectric and dielectric properties substantially. The electric measurements reveals that the ceramic with x=0.03 & 0.04 has the better piezoelectric and dielectric properties. The obtained properties are piezoelectric charge coefficient (d33), 140 pC/N, dielectric constant (ε), 850 and dielectric loss (tan δ), 0.045. BNKT ceramic prototypes are designed to operate with lamb waves for the purpose of monitoring the structural integrity of structures.
{"title":"Sr doped BNKT sensor materials for structural health monitoring","authors":"S. Rastogi, B. Praveenkumar, P. Divya, Ashavani Kumar","doi":"10.1109/ISPTS.2015.7220087","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220087","url":null,"abstract":"In the current paper lead-free piezoelectric ceramics BNKT, [Bi0.5(Na0.85K0.15)0.5]1-xSrxTiO3 (where x=0, 0.02, 0.04, 0.06) are prepared by conventional solid state route. Calcination studies are carried out to optimize the properties. XRD studies are carried out to confirm the perovskite phase formation. The powders are prepared in the form of discs of 10 mm diameter and 1.0 mm thickness. Subsequently, compacted samples are sintered in the range of 1175 °C to 1200 °C to improve the density. The relative densities of all the samples are determined by first principle method. Poling dependence and stability of lead free BNKT ceramic system are investigated. The effect of Sr doping piezoelectric charge coefficient (d33), and coupling coefficient (Kp) are discussed in detail. Dielectric properties are studied by varying strontium content. Partial doping of Sr on BNKT ceramic improved the piezoelectric and dielectric properties substantially. The electric measurements reveals that the ceramic with x=0.03 & 0.04 has the better piezoelectric and dielectric properties. The obtained properties are piezoelectric charge coefficient (d33), 140 pC/N, dielectric constant (ε), 850 and dielectric loss (tan δ), 0.045. BNKT ceramic prototypes are designed to operate with lamb waves for the purpose of monitoring the structural integrity of structures.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"62 1","pages":"79-82"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89953328","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 : 2015-03-07DOI: 10.1109/ISPTS.2015.7220132
Amir Javadpour, Hamidreza Memarzadeh-Tehran
Thispaper presents the design and realization of a context-aware wireless health monitoring system for recording the heartbeat (HR) and respiration (RR) rate based on an indirect measurement approach. The system consists of a contact-less medical sensor as well as a communication infrastructure for handling the transmission and reception of the measured results. The contact-less sensor includes a highly sensitive tri-axial accelerometer, an accurate temperature and air pressure sensor that enable one to inspect patients' health condition by continuously monitoring of two critical signs related to the cardiorespiratory system. The developed system can also be utilized in performing a number of long-term inspection on the heart and lungs while measuring the HR and RR values in addition to calculating the HR and RR ratio, which is denoted by HRR. The obtained results show the potential of the developed system for versatile monitoring applications applied to telemedicine.
{"title":"A wearable medical sensor for provisional healthcare","authors":"Amir Javadpour, Hamidreza Memarzadeh-Tehran","doi":"10.1109/ISPTS.2015.7220132","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220132","url":null,"abstract":"Thispaper presents the design and realization of a context-aware wireless health monitoring system for recording the heartbeat (HR) and respiration (RR) rate based on an indirect measurement approach. The system consists of a contact-less medical sensor as well as a communication infrastructure for handling the transmission and reception of the measured results. The contact-less sensor includes a highly sensitive tri-axial accelerometer, an accurate temperature and air pressure sensor that enable one to inspect patients' health condition by continuously monitoring of two critical signs related to the cardiorespiratory system. The developed system can also be utilized in performing a number of long-term inspection on the heart and lungs while measuring the HR and RR values in addition to calculating the HR and RR ratio, which is denoted by HRR. The obtained results show the potential of the developed system for versatile monitoring applications applied to telemedicine.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"1 1","pages":"293-296"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88591374","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 : 2015-03-07DOI: 10.1109/ISPTS.2015.7220137
S. Saranya, A. Sankar
Electro-chemical discharge machining (ECDM) is a recent technique used to machine insulating materials like glass and ceramics. This paper presents the results of the combined effects of tool feed-rate and tool shape on the micro-machining of a quartz substrate using an ECDM process. The investigations show that a tool with a spherical tip provides a profile with a reduced entrance diameter and the overcut can be considerably reduced by controlling the tool feed-rate.
{"title":"Effect of tool shape and tool feed rate on the machined profile of a quartz substrate using an electrochemical discharge machining process","authors":"S. Saranya, A. Sankar","doi":"10.1109/ISPTS.2015.7220137","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220137","url":null,"abstract":"Electro-chemical discharge machining (ECDM) is a recent technique used to machine insulating materials like glass and ceramics. This paper presents the results of the combined effects of tool feed-rate and tool shape on the micro-machining of a quartz substrate using an ECDM process. The investigations show that a tool with a spherical tip provides a profile with a reduced entrance diameter and the overcut can be considerably reduced by controlling the tool feed-rate.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"15 1","pages":"313-316"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80654150","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 : 2015-03-07DOI: 10.1109/ISPTS.2015.7220156
A. Shah, O. P. Chauhan
Summary form only given. The agri-food market the world over has increased biological, chemical and physical threats to food products, triggering a bigger consumer demand on process control, quality and safety of these products. Bio-sensors can play a vital role in the agricultural and food sectors to control production processes and ensure greater food quality and safety by reliable, fast and cost effective monitoring procedures. Bio-sensors are promising alternatives to conventional analytical tools since they offer advantages in size, cost, specificity, rapid response, precision and sensitivity. Each step in the agricultural and food production chain is susceptible to myriad threats in terms of loss of quality and transmission of diseases. These biological, chemical and / or physical threats can emanate from environmental contamination or failures during food handling, processing, packaging and distribution. Bio-sensors can detect, analyse and quantify molecules of different biological origins and throw light on the quality of food or agri-material in terms of their spiking with pesticides, fertilizers and dioxins residues, in addition to providing information on contaminated water and soil residues, genetically modified organisms, pathogenic microorganisms and their toxins, and food components such as antinutrients, allergens, drugs, additives, and hydrocarbons. Biosensors are also useful for the evaluation of food composition that undergo transformation during post-harvest operations and processing. Biosensors enable real time monitoring of variables such as pH, temperature, pressure, oxygen, flow and volatile substances. Biosensors can also play a useful role in the implementation of hazard analysis and critical control points (HACCP) plans by detection of food borne pathogens and chemical contaminants. Suitably developed and designed biosensors can effectively screen air, water, soil, food, fresh and waste plant and animal agro-material for mitigation of bio-threat paradigm also by rapid detection of pathogenic microbes. Biosensors enable capturing of genetic signatures of various bio-pathogens and their toxic metabolites, that can pose a potential threat to human health and well being during outbreak of any unfortunate biological warfare (BW).
{"title":"IT16. Applications of bio-sensors in agri-food industry and mitigation of bio-threat paradigm","authors":"A. Shah, O. P. Chauhan","doi":"10.1109/ISPTS.2015.7220156","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220156","url":null,"abstract":"Summary form only given. The agri-food market the world over has increased biological, chemical and physical threats to food products, triggering a bigger consumer demand on process control, quality and safety of these products. Bio-sensors can play a vital role in the agricultural and food sectors to control production processes and ensure greater food quality and safety by reliable, fast and cost effective monitoring procedures. Bio-sensors are promising alternatives to conventional analytical tools since they offer advantages in size, cost, specificity, rapid response, precision and sensitivity. Each step in the agricultural and food production chain is susceptible to myriad threats in terms of loss of quality and transmission of diseases. These biological, chemical and / or physical threats can emanate from environmental contamination or failures during food handling, processing, packaging and distribution. Bio-sensors can detect, analyse and quantify molecules of different biological origins and throw light on the quality of food or agri-material in terms of their spiking with pesticides, fertilizers and dioxins residues, in addition to providing information on contaminated water and soil residues, genetically modified organisms, pathogenic microorganisms and their toxins, and food components such as antinutrients, allergens, drugs, additives, and hydrocarbons. Biosensors are also useful for the evaluation of food composition that undergo transformation during post-harvest operations and processing. Biosensors enable real time monitoring of variables such as pH, temperature, pressure, oxygen, flow and volatile substances. Biosensors can also play a useful role in the implementation of hazard analysis and critical control points (HACCP) plans by detection of food borne pathogens and chemical contaminants. Suitably developed and designed biosensors can effectively screen air, water, soil, food, fresh and waste plant and animal agro-material for mitigation of bio-threat paradigm also by rapid detection of pathogenic microbes. Biosensors enable capturing of genetic signatures of various bio-pathogens and their toxic metabolites, that can pose a potential threat to human health and well being during outbreak of any unfortunate biological warfare (BW).","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"51 1","pages":"XXXII-XXXII"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79983939","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 : 2015-03-07DOI: 10.1109/ISPTS.2015.7220069
A. Narayan, H. Dasgupta, Himangshu Pal
The objective of this work is to make a Surface Electromyography (EMG) signal detection sensor to test and analyze human motion pattern. EMG signal has a very small amplitude level and a frequency range of 20 Hz to 200 Hz. In order to realize the sensor, a circuit and its single layer PCB has been designed to amplify and filter the differential potential between Ag/AgCl electrodes at different points. After that the signal has been stored in computer using NI ELVIS II (DAQ) and LABVIEW at a sampling rate of 1000Hz. Then the signal has been used to calculate the stride length of a particular foot by a single threshold comparison method. The ultimate result shows that the calculated and actual stride length matches in 89% of the cases.
本工作的目的是制造一种表面肌电信号检测传感器来测试和分析人体的运动模式。肌电图信号的幅度非常小，频率范围为20 ~ 200 Hz。为了实现该传感器，设计了一个电路及其单层PCB来放大和滤波不同位置Ag/AgCl电极之间的差分电位。然后用NI ELVIS II (DAQ)和LABVIEW以1000Hz的采样率将信号存储在计算机中。然后用单阈值比较法计算某只脚的步长。最终结果表明，计算出的步幅和实际步幅在89%的情况下是匹配的。
{"title":"Instrumentation of a portable EMG sensor in a single PCB for human motion pattern detection","authors":"A. Narayan, H. Dasgupta, Himangshu Pal","doi":"10.1109/ISPTS.2015.7220069","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220069","url":null,"abstract":"The objective of this work is to make a Surface Electromyography (EMG) signal detection sensor to test and analyze human motion pattern. EMG signal has a very small amplitude level and a frequency range of 20 Hz to 200 Hz. In order to realize the sensor, a circuit and its single layer PCB has been designed to amplify and filter the differential potential between Ag/AgCl electrodes at different points. After that the signal has been stored in computer using NI ELVIS II (DAQ) and LABVIEW at a sampling rate of 1000Hz. Then the signal has been used to calculate the stride length of a particular foot by a single threshold comparison method. The ultimate result shows that the calculated and actual stride length matches in 89% of the cases.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"41 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81486565","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 : 2015-03-07DOI: 10.1109/ISPTS.2015.7220120
C. R. Bobade, S. Mahajan, M. Uplane
Cadmium zinc oxide (CdXZn1-XO) thin films were deposited at low substrate temperature using advanced spray pyrolysis technique. Aqueous solution of cadmium acetate and zinc acetate were used as initial ingredients. The films were prepared by keeping optimized preparative parameters constant. Influence of variation of zinc in the `CdXZn1-XO' system on the structural, electrical and gas sensing properties of the films has been investigated. X-ray diffraction studies indicate polycrystalline nature of the films. Field emission scanning electron micrograph measurements reveal that the grain size decreases with increase in zinc content. It is found that films are sensitive to H2S gas and maximum response is observed at the operating temperature of 300°C.
{"title":"H2S gas sensing studies of CdXZn1−XO thin films synthesized at low temperature by advanced spray pyrolysis technique","authors":"C. R. Bobade, S. Mahajan, M. Uplane","doi":"10.1109/ISPTS.2015.7220120","DOIUrl":"https://doi.org/10.1109/ISPTS.2015.7220120","url":null,"abstract":"Cadmium zinc oxide (CdXZn1-XO) thin films were deposited at low substrate temperature using advanced spray pyrolysis technique. Aqueous solution of cadmium acetate and zinc acetate were used as initial ingredients. The films were prepared by keeping optimized preparative parameters constant. Influence of variation of zinc in the `CdXZn1-XO' system on the structural, electrical and gas sensing properties of the films has been investigated. X-ray diffraction studies indicate polycrystalline nature of the films. Field emission scanning electron micrograph measurements reveal that the grain size decreases with increase in zinc content. It is found that films are sensitive to H2S gas and maximum response is observed at the operating temperature of 300°C.","PeriodicalId":6520,"journal":{"name":"2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)","volume":"107 1","pages":"240-244"},"PeriodicalIF":0.0,"publicationDate":"2015-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74273953","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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