Sensing Technologies + Applications最新文献_第5页

Micro enzymatic biofuel cells: from theoretical to experimental aspect 微酶生物燃料电池:从理论到实验

Sensing Technologies + Applications Pub Date : 2015-05-15 DOI: 10.1117/12.2180125

Yin Song, R. Agrawal, Chunlei Wang

{"title":"Micro enzymatic biofuel cells: from theoretical to experimental aspect","authors":"Yin Song, R. Agrawal, Chunlei Wang","doi":"10.1117/12.2180125","DOIUrl":"https://doi.org/10.1117/12.2180125","url":null,"abstract":"Miniaturized enzymatic biofuel cells (EBFCs) that convert biological energy into electrical energy by using enzymemodified electrodes are considered as one of the promising candidates to power the implantable medical devices and portable electronics. However, their low power density and insufficient cell lifetime are two big obstacles to need to be tackled before EBFCs become viable for practical application. In this study, the theoretical simulation of this EBFC system is conducted using finite element analysis from COMSOL 4.3a in terms of cell performance, efficiency and optimum cell configurations. We optimized the electrodes design in steady state based on a three dimensional EBFC chip and studied the effect of orientation of the microelectrode arrays in blood artery. In the experimental part, we demonstrated an EBFC system that used 3D micropillar arrays integrated with graphene/enzyme composites. The fabrication process of this system combined top-down carbon microelectromechanical system (CMEMS) technology to fabricate the 3D micropillar arrays platform and bottom-up electrophoretic deposition (EPD) to deposit graphene/enzyme composite onto the 3D micropillar arrays. The amperometric response of the graphene based bioelectrodes exhibited excellent electrochemical performance and the 3D graphene/enzyme based EBFC generated a maximum power density of 136.3 μWcm-2 at 0.59 V, which is about 7 times of the maximum power density of the bare 3D carbon based EBFC.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127084447","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: 5

Small hole inner profile measurement methods 小孔内轮廓测量方法

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177362

Yi Liao, K. Harding, Rajesh Ramamurthy

引用次数: 1

A brief survey of sensing for metal-based powder bed fusion additive manufacturing 金属基粉末床熔融增材制造传感技术综述

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2180654

B. Foster, E. Reutzel, A. Nassar, C. Dickman, B. Hall

{"title":"A brief survey of sensing for metal-based powder bed fusion additive manufacturing","authors":"B. Foster, E. Reutzel, A. Nassar, C. Dickman, B. Hall","doi":"10.1117/12.2180654","DOIUrl":"https://doi.org/10.1117/12.2180654","url":null,"abstract":"Purpose – Powder bed fusion additive manufacturing (PBFAM) of metal components has attracted much attention, but the inability to quickly and easily ensure quality has limited its industrial use. Since the technology is currently being investigated for critical engineered components and is largely considered unsuitable for high volume production, traditional statistical quality control methods cannot be readily applied. An alternative strategy for quality control is to monitor the build in real time with a variety of sensing methods and, when possible, to correct any defects as they occur. This article reviews the cause of common defects in powder bed additive manufacturing, briefly surveys process monitoring strategies in the literature, and summarizes recently-developed strategies to monitor part quality during the build process. Design/methodology/approach – Factors that affect part quality in powder bed additive manufacturing are categorized as those influenced by machine variables and those affected by other build attributes. Within each category, multiple process monitoring methods are presented. Findings – A multitude of factors contribute to the overall quality of a part built using PBFAM. Rather than limiting processing to a pre-defined build recipe and assuming complete repeatability, part quality will be ensured by monitoring the process as it occurs and, when possible, altering the process conditions or build plan in real-time. Recent work shows promise in this area and brings us closer to the goal of wide-spread adoption of additive manufacturing technology. Originality/value - This work serves to introduce and define the possible sources of defects and errors in metal-based PBFAM, and surveys sensing and control methods which have recently been investigated to increase overall part quality. Emphasis has been placed on novel developments in the field and their contribution to the understanding of the additive manufacturing process.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129448048","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: 26

Computational imaging in a multiplexed imager with static multispectral encoding 静态多光谱编码复用成像仪中的计算成像

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177062

Johann Veras, R. Muise, K. Hines, Abhijit Mahalanobis, M. Neifeld

引用次数: 0

Method for controlling a laser additive process using intrinsic illumination 使用本征照明控制激光加性过程的方法

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2182511

R. Tait, Guoshuang Cai, M. Azer, Xiaobin Chen, Yong Liu, K. Harding

引用次数: 1

Measuring accuracy of in-plane and out-of-plane deformation simultaneous measurement of speckle interferometry using multi-recording method 多记录散斑干涉法同时测量面内、面外变形的测量精度

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2181198

Y. Arai

引用次数: 2

An analysis of spectral transformation techniques on graphs 图的谱变换技术分析

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177188

I. Djurović, E. Sejdić, Nikola Bulatovic, M. Simeunović

{"title":"An analysis of spectral transformation techniques on graphs","authors":"I. Djurović, E. Sejdić, Nikola Bulatovic, M. Simeunović","doi":"10.1117/12.2177188","DOIUrl":"https://doi.org/10.1117/12.2177188","url":null,"abstract":"Emerging methods for the spectral analysis of graphs are analyzed in this paper, as graphs are currently used to study interactions in many fields from neuroscience to social networks. There are two main approaches related to the spectral transformation of graphs. The first approach is based on the Laplacian matrix. The graph Fourier transform is defined as an expansion of a graph signal in terms of eigenfunctions of the graph Laplacian. The calculated eigenvalues carry the notion of frequency of graph signals. The second approach is based on the graph weighted adjacency matrix, as it expands the graph signal into a basis of eigenvectors of the adjacency matrix instead of the graph Laplacian. Here, the notion of frequency is then obtained from the eigenvalues of the adjacency matrix or its Jordan decomposition. In this paper, advantages and drawbacks of both approaches are examined. Potential challenges and improvements to graph spectral processing methods are considered as well as the generalization of graph processing techniques in the spectral domain. Its generalization to the time-frequency domain and other potential extensions of classical signal processing concepts to graph datasets are also considered. Lastly, it is given an overview of the compressive sensing on graphs concepts.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122079382","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

Multi-view TWRI scene reconstruction using a joint Bayesian sparse approximation model 基于联合贝叶斯稀疏逼近模型的多视图TWRI场景重建

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2180096

Van Ha Tang, A. Bouzerdoum, S. L. Phung, F. Tivive

引用次数: 2

3D tracking for borescope inspections 用于管镜检查的3D跟踪

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2176636

Yong Yang, G. Song, K. Harding

{"title":"3D tracking for borescope inspections","authors":"Yong Yang, G. Song, K. Harding","doi":"10.1117/12.2176636","DOIUrl":"https://doi.org/10.1117/12.2176636","url":null,"abstract":"Service providers perform regular borescope inspection of field products to ensure system performance and prevent accidents. A full borescope inspection for large equipment usually takes several days to cover every region of interest in the turbine. One of the challenges that causes this long inspection time is the difficulty in navigating the borescope tip to some position of interest and aiming the view of the borescope in given direction. The image from the borescope tip is the only information available to the operator to judge the position of tip. In some cases, the operator can get lost due to the limited field-of-view and illumination provided by the borescope. It is very hard to tell the borescope tip position from one borescope image. This increases the difficulty of correlating the inspection results obtained at different times that might be used to predict potential machinery failure. This paper discusses various methods that have been investigated for 3D borescope tracking and presents a new approach using a shape sensor integrated in the borescope tube used with image based location determination to determine the position of the borescope tip during inspections. The shape sensor provides a real time estimate of the borescope tip position and orientation then the image based analysis uses the part CAD model to fine tune this position information. The tracking result can provide better information of the tip position for the operator. This enhanced position information can be used to better monitor defect changes over time by comparing the inspection result at different times in the parts lifetime.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130443943","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

Compressive spectral polarization imaging with coded micropolarizer array 压缩光谱偏振成像与编码微偏振器阵列

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177813

Chen Fu, H. Arguello, Brian M. Sadler, G. Arce

引用次数: 1