Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260956
P. Adhyapak, U. Mulik, D. Amalnerkar, I. Mulla
α-Fe2O3 nanorods have been prepared at low temperature by a facile surfactant free chemical route. The advantage of this method is good composition control and homogeneity. The products were characterized using various physicochemical characterization techniques such as X-ray Diffractometry, Raman spectroscopy, UV-Visible spectroscopy and Field Emission Scanning Electron Microscopy. These powders were further studied for their humidity sensing performance. The sensors exhibited quick responses for change in the humidity. The resistance systematically varies by four orders of magnitude on exposure to humidity from 20 to 90 % RH.
{"title":"α-Fe2O3 nanorods: Low temperature synthesis, characterization and humidity response properties","authors":"P. Adhyapak, U. Mulik, D. Amalnerkar, I. Mulla","doi":"10.1109/ISPTS.2012.6260956","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260956","url":null,"abstract":"α-Fe2O3 nanorods have been prepared at low temperature by a facile surfactant free chemical route. The advantage of this method is good composition control and homogeneity. The products were characterized using various physicochemical characterization techniques such as X-ray Diffractometry, Raman spectroscopy, UV-Visible spectroscopy and Field Emission Scanning Electron Microscopy. These powders were further studied for their humidity sensing performance. The sensors exhibited quick responses for change in the humidity. The resistance systematically varies by four orders of magnitude on exposure to humidity from 20 to 90 % RH.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81599171","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 : 2012-03-07DOI: 10.1109/ISPTS.2012.6260883
B. N. Shivananju, M. K. Priydarshi, D. Roy Mahapatra, G. Hegde, S. Asokan
In this paper we show a novel chemo-mechanical-optical sensing mechanism in single and multi-layer hydrogel coated Fiber Bragg Grating (FBG) and demonstrate specific application in pH activated processes. The sensing device is based on the ionizable monomers inside the hydrogel which reversibly dissociates as a function of the pH and consequently resulting in osmotic pressure difference between the gel and the solution. This pressure gradient causes the hydrogel to deform which in turn induces secondary strain on the FBG sensor resulting in shift in the Bragg wavelength. We also report on the sensitivity factor of single and multilayer hydrogel coated FBG at various different pH.
{"title":"pH sensing by single and multi-layer hydrogel coated Fiber Bragg Grating","authors":"B. N. Shivananju, M. K. Priydarshi, D. Roy Mahapatra, G. Hegde, S. Asokan","doi":"10.1109/ISPTS.2012.6260883","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260883","url":null,"abstract":"In this paper we show a novel chemo-mechanical-optical sensing mechanism in single and multi-layer hydrogel coated Fiber Bragg Grating (FBG) and demonstrate specific application in pH activated processes. The sensing device is based on the ionizable monomers inside the hydrogel which reversibly dissociates as a function of the pH and consequently resulting in osmotic pressure difference between the gel and the solution. This pressure gradient causes the hydrogel to deform which in turn induces secondary strain on the FBG sensor resulting in shift in the Bragg wavelength. We also report on the sensitivity factor of single and multilayer hydrogel coated FBG at various different pH.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89804465","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 : 2012-03-07DOI: 10.1109/ISPTS.2012.6260876
A. Moshayedi, D. Gharpure
Plume tracking has to deal with tracking strategy and geometrical design of sensors array. This research paper proposes a Priority base (PB) algorithm, modeling the insect behavior to localize the odor source and acquire better response from sensor array. The sensor array designed includes five gas sensors (three TGS 813 and two MQ2) and three temperature sensor used to track wind. The array in mounted on a movable platform Mokhtar [7] for tracking the plume and localizing the source.
{"title":"Priority based algorithm for Plume tracking Robot","authors":"A. Moshayedi, D. Gharpure","doi":"10.1109/ISPTS.2012.6260876","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260876","url":null,"abstract":"Plume tracking has to deal with tracking strategy and geometrical design of sensors array. This research paper proposes a Priority base (PB) algorithm, modeling the insect behavior to localize the odor source and acquire better response from sensor array. The sensor array designed includes five gas sensors (three TGS 813 and two MQ2) and three temperature sensor used to track wind. The array in mounted on a movable platform Mokhtar [7] for tracking the plume and localizing the source.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87895177","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 : 2012-03-07DOI: 10.1109/ISPTS.2012.6260940
D. Kharbanda, P. K. Khanna, C. Shekhar, A. Mohan
Low temperature co-fired ceramics (LTCC)-technology, which is widely used for packaging and manufacturing high frequency RF components, is used for fabrication of micro-hotplates (MHP). Gas sensors produced using this technology leads to low power consumption (500 mW for 226 °C) due to low thermal conductivity (3–4 W/(m-K)). For small series, this technology is remarkably inexpensive compared to the expensive silicon technology. Thermal properties such as temperature distribution and power consumption have been investigated using FEM (Finite Element Method) simulations. Mathematical modeling of these hotplates is also done in accordance with the simulated results.
{"title":"Design, simulation and modelling of LTCC based micro hotplate for gas sensor applications","authors":"D. Kharbanda, P. K. Khanna, C. Shekhar, A. Mohan","doi":"10.1109/ISPTS.2012.6260940","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260940","url":null,"abstract":"Low temperature co-fired ceramics (LTCC)-technology, which is widely used for packaging and manufacturing high frequency RF components, is used for fabrication of micro-hotplates (MHP). Gas sensors produced using this technology leads to low power consumption (500 mW for 226 °C) due to low thermal conductivity (3–4 W/(m-K)). For small series, this technology is remarkably inexpensive compared to the expensive silicon technology. Thermal properties such as temperature distribution and power consumption have been investigated using FEM (Finite Element Method) simulations. Mathematical modeling of these hotplates is also done in accordance with the simulated results.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88758313","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 : 2012-03-07DOI: 10.1109/ISPTS.2012.6260872
A. Tripathi, Abhishek Shrimali, B. Padhy
In this paper, fiber Bragg grating (FBG) array incorporating three FBGs in SMG-28 fiber with distinct centre wavelengths at 1545.01 nm, 1550.03 nm and 1555.03 nm has been investigated for multipoint sensing of monotonic temperature fields. The response and sensitivity of the commercially available FBG array is compared with OptiGrating 4.2.1 simulations. The findings can be used for optimizing the key parameters of FBG array sensor for cost effective and spectrally enhanced multipoint and distributed sensors.
{"title":"Analysis of fiber Bragg grating array based multipoint sensor for monotonic temperature fields","authors":"A. Tripathi, Abhishek Shrimali, B. Padhy","doi":"10.1109/ISPTS.2012.6260872","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260872","url":null,"abstract":"In this paper, fiber Bragg grating (FBG) array incorporating three FBGs in SMG-28 fiber with distinct centre wavelengths at 1545.01 nm, 1550.03 nm and 1555.03 nm has been investigated for multipoint sensing of monotonic temperature fields. The response and sensitivity of the commercially available FBG array is compared with OptiGrating 4.2.1 simulations. The findings can be used for optimizing the key parameters of FBG array sensor for cost effective and spectrally enhanced multipoint and distributed sensors.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84624983","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 : 2012-03-07DOI: 10.1109/ISPTS.2012.6260885
M. Srinavasan
As more and more demands are placed on sensors in terms of points of application, environment, ease of use, sensitivity and overall performance, availability of information, etc., new materials, configurations and technologies are required to deliver systems that can meet stringent and uncompromising application requirements. This presentation will examine the role of nanomaterials in sensing and focus on controlled their manipulation at the nano- and molecular levels to provide engineered interfaces that can meet current and future demands.
{"title":"Materials and assembly for sensors: Nano-structuring at interfaces","authors":"M. Srinavasan","doi":"10.1109/ISPTS.2012.6260885","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260885","url":null,"abstract":"As more and more demands are placed on sensors in terms of points of application, environment, ease of use, sensitivity and overall performance, availability of information, etc., new materials, configurations and technologies are required to deliver systems that can meet stringent and uncompromising application requirements. This presentation will examine the role of nanomaterials in sensing and focus on controlled their manipulation at the nano- and molecular levels to provide engineered interfaces that can meet current and future demands.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78128542","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 : 2012-03-07DOI: 10.1109/ISPTS.2012.6260914
S. Gujare, Gaurav Jagtap, D. Gharpure, S. Ananthakrishnan
This paper presents prototype design of the FPGA based digital back-end for data acquisition and processing. The system consists of acquiring 1024 samples of data. The stored data is input to FFT core for data analysis. An RS 232 port has been implemented to aid in testing and debugging the system. Various modules are developed in VHDL and integrated to realize the complete system. The design is implemented and tested on SPARTAN 3E platform.
{"title":"FPGA based data acquisition and analysis system","authors":"S. Gujare, Gaurav Jagtap, D. Gharpure, S. Ananthakrishnan","doi":"10.1109/ISPTS.2012.6260914","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260914","url":null,"abstract":"This paper presents prototype design of the FPGA based digital back-end for data acquisition and processing. The system consists of acquiring 1024 samples of data. The stored data is input to FFT core for data analysis. An RS 232 port has been implemented to aid in testing and debugging the system. Various modules are developed in VHDL and integrated to realize the complete system. The design is implemented and tested on SPARTAN 3E platform.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76927190","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 : 2012-03-07DOI: 10.1109/ISPTS.2012.6260923
R. Nisha, K. Madhusoodanan, T. V. Vimalkumar, K. Vijayakumar
NO2 gas Sensing characteristics of thin films of Zinc oxide obtained by spray pyrolysis were studied. The film thickness was about 550nm. The effect of indium doping on the sensor performance were also studied. The sensing behavior in the temperature range of 100–225°C was measured to find out the optimal working temperature.
{"title":"Effect of Indium doping on the Gas sensing behavior of Zinc oxide films obtained by Chemical spray pyrolysis method","authors":"R. Nisha, K. Madhusoodanan, T. V. Vimalkumar, K. Vijayakumar","doi":"10.1109/ISPTS.2012.6260923","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260923","url":null,"abstract":"NO2 gas Sensing characteristics of thin films of Zinc oxide obtained by spray pyrolysis were studied. The film thickness was about 550nm. The effect of indium doping on the sensor performance were also studied. The sensing behavior in the temperature range of 100–225°C was measured to find out the optimal working temperature.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76804139","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 : 2012-03-07DOI: 10.1109/ISPTS.2012.6260868
P. Das, G. Singh
Copper substituted NiZn ferrite powder of a chemical formula Ni0.5−xCuxZn0.5Fe2O4 (0≤ × ≤0.3) is synthesized by auto combustion process at 350°C followed by the calcination at 600, 900 and 1000°C for 2h. The derived powder shows well distinct total seven peaks of cubic spinel structure with space group Fdℨ̅m. The considerable increments in the lattice constant and the reduction in an average crystallite sizes are observed with increasing the Cu content. At the optimal condition of x = 0.1, the crystallite size as small as 26 nm and the coercivity as high as 158 Oe is obtained in samples calcined at 600°C. The dielectric (έ, ε″, and tanδ) analyses show the frequency sensitive behavior in the low frequency region and the frequency independent characteristics at high frequency side due to the Maxwell-Wagner type of interfacial polarization and also due to hopping of charges between Fe2+ ↔Fe3+. The highest dielectric constant ∼ 48 at 1 kHz and the lowest dielectric loss ∼ 0.06 at 4 MHz are obtained in the studied frequency range, whereas the maximum frequency sensing response ∼ 92% is observed at 4 MHz in same sample.
{"title":"Structural, magnetic and dielectric properties in Cu substituted Ni-Zn ferrite for sensors applications","authors":"P. Das, G. Singh","doi":"10.1109/ISPTS.2012.6260868","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260868","url":null,"abstract":"Copper substituted NiZn ferrite powder of a chemical formula Ni<inf>0.5−x</inf>Cu<inf>x</inf>Zn<inf>0.5</inf>Fe<inf>2</inf>O<inf>4</inf> (0≤ × ≤0.3) is synthesized by auto combustion process at 350°C followed by the calcination at 600, 900 and 1000°C for 2h. The derived powder shows well distinct total seven peaks of cubic spinel structure with space group Fdℨ̅m. The considerable increments in the lattice constant and the reduction in an average crystallite sizes are observed with increasing the Cu content. At the optimal condition of x = 0.1, the crystallite size as small as 26 nm and the coercivity as high as 158 Oe is obtained in samples calcined at 600°C. The dielectric (έ, ε″, and tanδ) analyses show the frequency sensitive behavior in the low frequency region and the frequency independent characteristics at high frequency side due to the Maxwell-Wagner type of interfacial polarization and also due to hopping of charges between Fe<sup>2+</sup> ↔Fe3<sup>+</sup>. The highest dielectric constant ∼ 48 at 1 kHz and the lowest dielectric loss ∼ 0.06 at 4 MHz are obtained in the studied frequency range, whereas the maximum frequency sensing response ∼ 92% is observed at 4 MHz in same sample.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74351939","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 : 2012-03-07DOI: 10.1109/ISPTS.2012.6260921
P. C. Clinsha, V. Jayaraman, T. Gnanasekaran
Nominal compositions of general formula In2−xMnxO3−δ were prepared by solid-state route and their electrical conductivity and hydrogen sensing characteristics were investigated. With manganese addition, the conductivity was found to increase initially and then decrease while the activation energy for the conduction process was increasing. In1.99Mn0.01O3-δ, In1.985Mn0.015O3-δ, In1.98Mn0.02O3-δ were found to sense 100 vppm to 2 % of hydrogen at 623 K. Preliminary results indicated the possibility of two types of gas sensing mechanisms operating at low and high concentrations of hydrogen in air.
{"title":"Gas sensing properties of In2−xMnxO3−δ","authors":"P. C. Clinsha, V. Jayaraman, T. Gnanasekaran","doi":"10.1109/ISPTS.2012.6260921","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260921","url":null,"abstract":"Nominal compositions of general formula In<inf>2−x</inf>Mn<inf>x</inf><inf>O3−δ</inf> were prepared by solid-state route and their electrical conductivity and hydrogen sensing characteristics were investigated. With manganese addition, the conductivity was found to increase initially and then decrease while the activation energy for the conduction process was increasing. In<inf>1.99</inf>Mn<inf>0.01</inf>O<inf>3-δ</inf>, In<inf>1.985</inf>Mn<inf>0.015</inf>O<inf>3-δ</inf>, In<inf>1.98</inf>Mn<inf>0.02</inf>O<inf>3-δ</inf> were found to sense 100 vppm to 2 % of hydrogen at 623 K. Preliminary results indicated the possibility of two types of gas sensing mechanisms operating at low and high concentrations of hydrogen in air.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74566201","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：