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A load balancing algorithm based on probabilistic multi-tree for wireless sensor networks 基于概率多树的无线传感器网络负载均衡算法
2011 Fifth International Conference on Sensing Technology Pub Date : 2011-11-01 DOI: 10.1109/ICSENST.2011.6137035
T. Chung, Tzu-Shiang Lin, Xiang-Yao Zheng, P. Yen, Joe-Air Jiang
{"title":"A load balancing algorithm based on probabilistic multi-tree for wireless sensor networks","authors":"T. Chung, Tzu-Shiang Lin, Xiang-Yao Zheng, P. Yen, Joe-Air Jiang","doi":"10.1109/ICSENST.2011.6137035","DOIUrl":"https://doi.org/10.1109/ICSENST.2011.6137035","url":null,"abstract":"To extend the lifetime of a large wireless sensor network, it is important to spread the inevitable energy consumption (loads) across the network, and thus reduce hot spots. This article introduces a two-step solution to this issue based on the AODV tier allocation with multiple paths to disperse loads from hot spots. After the allocation, paths for nodes to transmit data back to the sink are decided through a probabilistic approach. By computer simulation, it is shown with various indexes that the performance of the proposed algorithm is better than that of deterministic approaches after network deployment, and an appropriate state can be reached in reasonable time.","PeriodicalId":202062,"journal":{"name":"2011 Fifth International Conference on Sensing Technology","volume":"70 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116251846","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}
引用次数: 9
Gas sensing characteristics of pure and Fe-doped tungsten oxide thin films 纯氧化钨和掺铁氧化钨薄膜的气敏特性
2011 Fifth International Conference on Sensing Technology Pub Date : 2011-11-01 DOI: 10.1109/ICSENST.2011.6136949
T. Tesfamichael, M. Ahsan, A. Ponzoni, G. Faglia
{"title":"Gas sensing characteristics of pure and Fe-doped tungsten oxide thin films","authors":"T. Tesfamichael, M. Ahsan, A. Ponzoni, G. Faglia","doi":"10.1109/ICSENST.2011.6136949","DOIUrl":"https://doi.org/10.1109/ICSENST.2011.6136949","url":null,"abstract":"In this study gas sensing characteristics of pure and 10at% Fe-doped nanostructured tungsten oxide thin films of various thicknesses (100–500 nm) prepared by electron beam evaporation are reported. The sensing performances of the films towards various gasses (H<inf>2</inf>, NH<inf>3</inf>, NO<inf>2</inf>, N<inf>2</inf>O) at different operating temperatures (150–280°C) have been investigated. Very high sensing response of both types of films towards NO<inf>2</inf> compared to the other target gasses was observed. This indicated that the WO<inf>3</inf> based sensors are highly selective to NO<inf>2</inf> exhibiting much lower response to the other target gasses. The pure WO<inf>3</inf> sensor of 300 nm film thickness has shown the highest response amplitude at lower temperature (150°C). Doping of the tungsten oxide film with Fe significantly increases the base conductance of the pure film but also decreases the gas sensing response. The amount of Fe additives (10 at%) has not been optimized which can be one factor for the decrease of sensing response. A film thickness of 400 nm has shown the optimum sensing responses among the WO<inf>3</inf>:Fe films. However, change of operating temperature between 200–250°C has shown little variation to the sensing response of the different films (100–500 nm). The high sensing performance of the WO<inf>3</inf> based sensors to NO<inf>2</inf> can be attributed due to the nanostructural nature of the films obtained through e-beam evaporation and subsequent annealing of the films at 300°C for 1 hour in air.","PeriodicalId":202062,"journal":{"name":"2011 Fifth International Conference on Sensing Technology","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123608329","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}
引用次数: 2
Refractive index measurement using laser diffractometer 用激光衍射仪测量折射率
2011 Fifth International Conference on Sensing Technology Pub Date : 2011-11-01 DOI: 10.1109/ICSENST.2011.6137002
C. Hsu, T. Liu
{"title":"Refractive index measurement using laser diffractometer","authors":"C. Hsu, T. Liu","doi":"10.1109/ICSENST.2011.6137002","DOIUrl":"https://doi.org/10.1109/ICSENST.2011.6137002","url":null,"abstract":"For refractive index measurement, this paper presents a new method based on a laser diffractometer, in which a reflective diffraction beam coincides with an incident beam. Calculation by using the angle of a reentry beam, grating pitch, and laser wavelength yields the refractive index. Based on a Littrow configuration, grating pitch measurement and immersion diffractometry are implemented to determine the refractive index of transparent liquids such as water, oil, and translucent liquids mixed with particles. Experimental results are presented to demonstrate variation in solution composition and the refractive index.","PeriodicalId":202062,"journal":{"name":"2011 Fifth International Conference on Sensing Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130467012","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}
引用次数: 2
Study of nano Fe2O3 MOS thick films as ethanol gas sensor 纳米Fe2O3 MOS厚膜乙醇气体传感器的研究
2011 Fifth International Conference on Sensing Technology Pub Date : 2011-11-01 DOI: 10.1109/ICSENST.2011.6136944
G. Jain, N. K. Pawar
{"title":"Study of nano Fe2O3 MOS thick films as ethanol gas sensor","authors":"G. Jain, N. K. Pawar","doi":"10.1109/ICSENST.2011.6136944","DOIUrl":"https://doi.org/10.1109/ICSENST.2011.6136944","url":null,"abstract":"Thick films of AR Grade nano Fe<inf>2</inf>O<inf>3</inf> material with n type semiconducting properties were prepared and tested for their gas sensing performances. Thick films of the materials were prepared by screen printing technique. The gas sensing performance was studied using static gas sensing system. The material was tested for various gases such as CO, CO<inf>2</inf>, NH<inf>3</inf>, Cl<inf>2</inf>, H<inf>2</inf>, LPG, ethanol and H<inf>2</inf>S. The nano Fe<inf>2</inf>O<inf>3</inf> film showed maximum sensitivity to Ethanol gas at 350°C temperature and at 250 ppm concentration with short response time and large recovery time. Physical and structural properties of the films material were studied by TEM, XRD.","PeriodicalId":202062,"journal":{"name":"2011 Fifth International Conference on Sensing Technology","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121432270","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}
引用次数: 0
A real time fiber optic micro displacement level sensor 一种实时光纤微位移液位传感器
2011 Fifth International Conference on Sensing Technology Pub Date : 2011-11-01 DOI: 10.1109/ICSENST.2011.6136998
D. Sengupta, M. Sai Shankar, P. Saidi Reddy, R.L.N SaiPrasad, K. S. Narayana, P. Kishore
{"title":"A real time fiber optic micro displacement level sensor","authors":"D. Sengupta, M. Sai Shankar, P. Saidi Reddy, R.L.N SaiPrasad, K. S. Narayana, P. Kishore","doi":"10.1109/ICSENST.2011.6136998","DOIUrl":"https://doi.org/10.1109/ICSENST.2011.6136998","url":null,"abstract":"Detection of micro change in liquid level using PMMA fiber in real time is demonstrated in this article. This sensor operates on light intensity modulation and such modulation results due to displacement of a floating reflector. The sensor system consists of light source, encapsulated PMMA fiber, floating reflector, photo detector, transimpedence amplifier, multimeter and a data acquisition system for the static and dynamic measurement. A change of 0.0073V at the output of the transimpedence amplifier was observed for 1 µm change in level. high sensitivity, good linearity, simple design and low cost make this sensor suitable for industry.","PeriodicalId":202062,"journal":{"name":"2011 Fifth International Conference on Sensing Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120937088","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}
引用次数: 1
LED based spectroscopy - A low cost solution for high resolution concentration measurements e.g. for gas monitoring applications 基于LED的光谱-用于高分辨率浓度测量的低成本解决方案，例如用于气体监测应用
2011 Fifth International Conference on Sensing Technology Pub Date : 2011-11-01 DOI: 10.1109/ICSENST.2011.6136951
M. Degner, H. Ewald, E. Lewis
{"title":"LED based spectroscopy - A low cost solution for high resolution concentration measurements e.g. for gas monitoring applications","authors":"M. Degner, H. Ewald, E. Lewis","doi":"10.1109/ICSENST.2011.6136951","DOIUrl":"https://doi.org/10.1109/ICSENST.2011.6136951","url":null,"abstract":"Reliable online sensor measurement data are the foundation of autonomous controlled processes. One important issue for a high quality production (closed loop control) as well as for environmental protection (waste reduction, reduction of harmful exhausts) is the in-situ concentration measurement of substances. Especially the selective and high resolved detection of individual substances is a complex issue for low cost sensor solutions. Optical spectroscopy is a valuable method according the selectivity and resolution but appropriate setups are quite complex (e.g. specialized light sources, spectral filtering optics, mechanical accuracy) thus they are cost intensive and almost not autonomous. This paper presents a low cost and high resolution (ppm and ppb range) spectrometric sensor system for gas detection in harsh environment. New LEDs are utilized as wavelength selective light sources in combination with standard photodiodes and optical fibers to realize robust in-situ gas measurements. Referenced measurement results for different applications are shown and discussed.","PeriodicalId":202062,"journal":{"name":"2011 Fifth International Conference on Sensing Technology","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124035172","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}
引用次数: 16
A half-ring GMR sensor for detection of magnetic beads immobilized on a circular micro-trap 用于检测固定在圆形微阱上的磁珠的半环GMR传感器
2011 Fifth International Conference on Sensing Technology Pub Date : 2011-11-01 DOI: 10.1109/ICSENST.2011.6136942
C. Gooneratne, C. Liang, A. Useinov, J. Kosel, I. Giouroudi
{"title":"A half-ring GMR sensor for detection of magnetic beads immobilized on a circular micro-trap","authors":"C. Gooneratne, C. Liang, A. Useinov, J. Kosel, I. Giouroudi","doi":"10.1109/ICSENST.2011.6136942","DOIUrl":"https://doi.org/10.1109/ICSENST.2011.6136942","url":null,"abstract":"Utilizing magnetic principles in biological immunoassays is an attractive option given its ability to remotely and non-invasively manipulate and detect cells tagged with micro/nano size superparamagnetic type beads and due to the fact that even the most complex biological immunoassays will have very little magnetic effect. The presence of magnetic beads can be detected by a magnetic sensor which quantifies the amount of target cells present in the immunoassay. In order to increase the detection rate a circular conducting micro-trap is employed to attract, trap and transport the magnetic beads to the sensing area. In this research we propose a half-ring spin valve type giant magnetoresistance (GMR) sensor for the measurement of stray fields produced by 2 µm magnetic beads which are around the circular micro-trap. A couple of half-ring GMR sensors can be used to cover the entire circular border width, in order to detect the majority of the immobilized magnetic beads. Analytical and numerical analysis leading towards the fabrication of the half-ring GMR sensor are presented. DC characterization of the fabricated sensor showed a magnetoresistance of 5.9 %. Experimental results showed that the half-ring GMR sensor detected the presence of 2 µm magnetic beads. Hence, half-ring GMR sensors integrated with a circular micro-trap have great potential to be used as an effective disease diagnostic device.","PeriodicalId":202062,"journal":{"name":"2011 Fifth International Conference on Sensing Technology","volume":"369 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115198138","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}
引用次数: 2
Intensity control of a phase-shift based laser scanner for reducing distance errors caused by different surface reflectivity 基于相移激光扫描器的强度控制以减小不同表面反射率引起的距离误差
2011 Fifth International Conference on Sensing Technology Pub Date : 2011-11-01 DOI: 10.1109/ICSENST.2011.6136958
Junhwan Jang, Sungui Hwang, Kyihwan Park
{"title":"Intensity control of a phase-shift based laser scanner for reducing distance errors caused by different surface reflectivity","authors":"Junhwan Jang, Sungui Hwang, Kyihwan Park","doi":"10.1109/ICSENST.2011.6136958","DOIUrl":"https://doi.org/10.1109/ICSENST.2011.6136958","url":null,"abstract":"In the phase-shift measurement method, the distance light travels can be obtained based on the phase difference between the reference signal and the measured signal. When the object having various colors is measured, the intensity of the measured signal much varies even at the same distance, and it causes different phase delay due to wide dynamic range input to a signal processing circuit. In this work, an intensity control method is proposed to solve this phase delay problem.","PeriodicalId":202062,"journal":{"name":"2011 Fifth International Conference on Sensing Technology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128762742","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}
引用次数: 4
Detection of surface cracks in fibre reinforced composites using ultrasonic Rayleigh waves 超声瑞利波检测纤维增强复合材料表面裂纹
2011 Fifth International Conference on Sensing Technology Pub Date : 2011-11-01 DOI: 10.1109/ICSENST.2011.6137019
M. Thomson, G. Gouws, P. Harris
{"title":"Detection of surface cracks in fibre reinforced composites using ultrasonic Rayleigh waves","authors":"M. Thomson, G. Gouws, P. Harris","doi":"10.1109/ICSENST.2011.6137019","DOIUrl":"https://doi.org/10.1109/ICSENST.2011.6137019","url":null,"abstract":"The use of ultrasound to detect defects in fibre reinforced composites (FRCs) is challenging due to the conflicting need to use high frequencies for adequate resolution, but simultaneously ensure adequate wave propagation in the material despite scattering from the fibres. This paper explores the use of Rayleigh surface waves in order to detect exterior cracks in a glass FRC rod. These surface waves are excellent at detecting surface cracks and are conveniently identified when immersed via energy leakage. Finite Element Analysis (FEA) models are used to simulate the propagation of a Rayleigh wave and the effect of surface cracks on this propagation. Experimental studies on glass and a composite material are then used to investigate the applicability of Rayleigh waves to detecting surface cracks.","PeriodicalId":202062,"journal":{"name":"2011 Fifth International Conference on Sensing Technology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116503545","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}
引用次数: 2
The use of dielectric models to determine moisture content in aggregate material 使用介电模型来测定集料中的水分含量
2011 Fifth International Conference on Sensing Technology Pub Date : 2011-11-01 DOI: 10.1109/ICSENST.2011.6136962
I. Platt, I. Woodhead, M. Hagedorn
{"title":"The use of dielectric models to determine moisture content in aggregate material","authors":"I. Platt, I. Woodhead, M. Hagedorn","doi":"10.1109/ICSENST.2011.6136962","DOIUrl":"https://doi.org/10.1109/ICSENST.2011.6136962","url":null,"abstract":"This paper provides a preliminary study on the properties of dielectric modeling when applied to composite aggregate materials under the action of Time Domain Reflectometry (TDR). While only the bounds of the values are determined, results indicate that models that take account of ionic exchange processes can come close to representing composite aggregate material. For high precision work however these existing models are not be accurate enough and a new mixing model is required.","PeriodicalId":202062,"journal":{"name":"2011 Fifth International Conference on Sensing Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121579231","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}
引用次数: 2
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