Sensing Technologies + Applications最新文献_第8页

High contrast imaging in the presence of a bright background 在明亮背景下进行高对比度成像

Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177506

H. Dhadwal, J. Rastegar, D. Feng

引用次数: 1

Characterization and calibration of Raman based distributed temperature sensing system for 600°C operation 600°C下基于拉曼的分布式温度传感系统的表征和校准

Sensing Technologies + Applications Pub Date : 2015-05-13 DOI: 10.1117/12.2179703

S. Mandal, Sachin Dekate, Boon Lee, R. Guida, M. Mondanos, J. Yeo, Marc Goranson

{"title":"Characterization and calibration of Raman based distributed temperature sensing system for 600°C operation","authors":"S. Mandal, Sachin Dekate, Boon Lee, R. Guida, M. Mondanos, J. Yeo, Marc Goranson","doi":"10.1117/12.2179703","DOIUrl":"https://doi.org/10.1117/12.2179703","url":null,"abstract":"Fiber optic distributed temperature sensing based on Raman scattering of light in optical fibers has become a very attractive solution for distributed temperature sensing (DTS) applications. The Raman scattered signal is independent of strain within the fiber, enabling simple packaging solutions for fiber optic temperature sensors while simultaneously improving accuracy and robustness of temperature measurements due to the lack of strain-induced errors in these measurements. Furthermore, the Raman scattered signal increases in magnitude at higher fiber temperatures, resulting in an improved SNR for high temperature measurements. Most Raman DTS instruments and fiber sensors are designed for operation up to approximately 300˚C. We will present our work in demonstrating high temperature calibration of a Raman DTS system using both Ge doped and pure silica core multi-mode optical fiber. We will demonstrate the tradeoffs involved in using each type of fiber for high temperature measurements. In addition, we will describe the challenges of measuring large temperature ranges (0 – 600˚C) with a single DTS interrogator and will demonstrate the need to customize the interrogator electronics and detector response in order to achieve reliable and repeatable high temperature measurements across a wide temperature range.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"119 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120916443","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: 3

Optimization of detonation velocity measurements using a chirped fiber Bragg grating 啁啾光纤布拉格光栅爆轰速度测量的优化

Sensing Technologies + Applications Pub Date : 2015-05-13 DOI: 10.1117/12.2176565

Y. Barbarin, A. Lefrançois, G. Zaniolo, V. Chuzeville, L. Jacquet, Sylvain Magne, J. Luc, A. Osmont

{"title":"Optimization of detonation velocity measurements using a chirped fiber Bragg grating","authors":"Y. Barbarin, A. Lefrançois, G. Zaniolo, V. Chuzeville, L. Jacquet, Sylvain Magne, J. Luc, A. Osmont","doi":"10.1117/12.2176565","DOIUrl":"https://doi.org/10.1117/12.2176565","url":null,"abstract":"Dynamic measurements of detonation velocity profiles are performed using long Chirped Fiber Bragg Gratings (CFBGs). Such thin probes, with a diameter of typically 150 μm, are inserted directly into a high explosive sample or simply positioned laterally. During the detonation, the width of the reflected optical spectrum is continuously reduced by the propagation of the wave-front, which physically shortens the CFBG. The reflected optical intensity delivers a ramp down signal type, which is directly related to the detonation velocity profile. Experimental detonation velocity measurements were performed on the side of three different high explosives (TNT, B2238 and V401) in a bare cylindrical stick configuration (diameter: 2 inches, height: 10 inches). The detonation velocity range covered was 6800 to 9000 m/s. The extraction of the detonation velocity profiles requires a careful calibration of the system and of the CFBG used. A calibration procedure was developed, with the support of optical simulations, to cancel out the optical spectrum distortions from the different optical components and to determine the wavelength-position transfer function of the CFBG in a reproducible way. The 40-mm long CFBGs were positioned within the second half of the three high explosive cylinders. The excellent linearity of the computed position-time diagram confirms that the detonation was established for the three high explosives. The fitted slopes of the position-time diagram give detonation velocity values which are in very good agreement with the classical measurements obtained from discrete electrical shorting pins.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"335 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124711806","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

Leptospirosis risk around a potential source of infection 潜在传染源周围的钩端螺旋体病风险

Sensing Technologies + Applications Pub Date : 2015-05-13 DOI: 10.1117/12.2177008

Erica Loaiza-Echeverry, D. Hincapié-Palacio, Jesús Ochoa Acosta, Juan Fernando Ospina Giraldo

{"title":"Leptospirosis risk around a potential source of infection","authors":"Erica Loaiza-Echeverry, D. Hincapié-Palacio, Jesús Ochoa Acosta, Juan Fernando Ospina Giraldo","doi":"10.1117/12.2177008","DOIUrl":"https://doi.org/10.1117/12.2177008","url":null,"abstract":"Leptospirosis is a bacterial zoonosis with world distribution and multiform clinical spectrum in men and animals. The etiology of this disease is the pathogenic species of Leptospira, which cause diverse manifestations of the disease, from mild to serious, such as the Weil disease and the lung hemorrhagic syndrome with lethal proportions of 10% - 50%. This is an emerging problem of urban health due to the growth of marginal neighborhoods without basic sanitary conditions and an increased number of rodents. The presence of rodents and the probability of having contact with their urine determine the likelihood for humans to get infected. In this paper, we simulate the spatial distribution of risk infection of human leptospirosis according to the proximity to rodent burrows considered as potential source of infection. The Bessel function K0 with an r distance from the potential point source, and the scale parameter α in meters was used. Simulation inputs were published data of leptospirosis incidence rate (range of 5 to 79 x 10 000), and a distance of 100 to 5000 meters from the source of infection. We obtained an adequate adjustment between the function and the simulated data. The risk of infection increases with the proximity of the potential source. This estimation can become a guide to propose effective measures of control and prevention.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"1996 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123785327","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

Ring resonators in polymer foils for sensing of gaseous species 用于气体传感的聚合物薄膜环形谐振器

Sensing Technologies + Applications Pub Date : 2015-05-13 DOI: 10.1117/12.2183336

E. Pichler, Konrad Bethmann, U. Zywietz, Christian Spad, U. Gleißner, Christian Kelb, B. Roth, C. Reinhardt, U. Willer, W. Schade

引用次数: 3

A graphene-modified cellulose paper microchip for HIV detection 一种用于HIV检测的石墨烯改性纤维素纸微芯片

Sensing Technologies + Applications Pub Date : 2015-05-13 DOI: 10.1117/12.2183217

Mohammadali Safavieh, Sultan Khetani, Vivasvat Kaul, D. Kuritzkes, H. Shafiee

引用次数: 5

Investigation of the optical and sensing characteristics of nanoparticle arrays for high temperature applications 纳米粒子阵列在高温下的光学和传感特性研究

Sensing Technologies + Applications Pub Date : 2015-05-13 DOI: 10.1117/12.2177572

G. Dharmalingam, M. Carpenter

{"title":"Investigation of the optical and sensing characteristics of nanoparticle arrays for high temperature applications","authors":"G. Dharmalingam, M. Carpenter","doi":"10.1117/12.2177572","DOIUrl":"https://doi.org/10.1117/12.2177572","url":null,"abstract":"Monitoring polluting gases such as CO and NOx emitted from gas turbines in power plants and aircraft is important, in order to both reduce the effects of such gases on the environment as well as to optimize the performance of the respective power system. Fuel cost savings as well as a reduced environmental impact can be realized if air traffic utilized next generation jet turbines with an emission/performance control sensing system. These monitoring systems must be sensitive and selective to gases as well as be reliable and stable under harsh environmental conditions where the operation temperatures are in excess of 500 °C within a highly reactive environment. In this work, plasmonics based chemical sensors with nanocomposites of a combination of gold nano particles and Yttria Stabilized Zirconia (YSZ) has enabled the sensitive (PPM) and stable detection (100s of hrs.) of H2, NO2 and CO at temperatures of 500 °C. Selectivity remains a challenging parameter to optimize and a layer by layer sputter deposition approach has been recently demonstrated to modify the resulting sensing properties through a change in the morphology of the deposited films. It is expected that further enhancements would be realized through control of the shape and geometry of the catalytically active Au nanoparticles. This level of control has been realized through the use of electron beam lithography to fabricate nanocomposite arrays. Sensing results towards the detection of H2 will be highlighted with specific concerns related to optimization of these nanorod arrays detailed.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"9491 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129604898","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

Dispersive Raman spectroscopy excited at 1064nm to classify the botanic origin of honeys from Calabria and quantify the sugar profile 在1064nm激发色散拉曼光谱对卡拉布里亚蜂蜜的植物来源进行分类，并量化糖谱

Sensing Technologies + Applications Pub Date : 2015-05-13 DOI: 10.1117/12.2179699

A. Mignani, L. Ciaccheri, A. Mencaglia, R. Di Sanzo, S. Carabetta, M. Russo

引用次数: 2

On-chip surface-enhanced Raman spectroscopy (SERS)-linked immuno-sensor assay (SLISA) for rapid environmental-surveillance of chemical toxins 片上表面增强拉曼光谱(SERS)连接免疫传感器测定(SLISA)用于化学毒素的快速环境监测

Sensing Technologies + Applications Pub Date : 2015-05-13 DOI: 10.1117/12.2182591

V. Bhardwaj, S. Srinivasan, A. McGoron

{"title":"On-chip surface-enhanced Raman spectroscopy (SERS)-linked immuno-sensor assay (SLISA) for rapid environmental-surveillance of chemical toxins","authors":"V. Bhardwaj, S. Srinivasan, A. McGoron","doi":"10.1117/12.2182591","DOIUrl":"https://doi.org/10.1117/12.2182591","url":null,"abstract":"The increasing threat of an intentional (attack) or accidental release of toxins, in particular chemical toxins, including chemical warfare agents (CWAs) and toxic industrial chemicals (TICs) has increased public fear. The major problem in such attacks/accidents is to detect toxins present in very low levels. Indeed, several detection techniques are currently being used for the same. However, none of them meet the most critical requirements of a RISE (Rapid, Inexpensive, Simple and Effective) detect-to-protect class of biosensors. To address this critical demand our group has developed a prototype lab-on-a-chip (LOC) using a colloidal silver-based, surface-enhanced Raman spectroscopy (SERS)-linked immuno-sensor assay (SLISA). The LOC-SLISA was tested for the measurement of RAD54, a stress-marker protein expressed by yeast in response to hydrogen peroxide (H2O2), a toxin in the EPA priority list of chemical toxins. We found SLISA has good correlation in accuracy with the traditional ELISA technique and outperforms the latter by being rapid and easy-to-use. SLISA is more sensitive, provides qualitative information on immuno-sensor’s chemical characterization and antigen-antibody binding, and allows direct detection with minimal or no chance of uncertainty, which is a stringent limitation of all label-based biosensor technologies including ELISA. For translational significance of our work, we correlated our results to U.S. EPA (environmental protection agency) defined risk exposure guideline levels of H2O2 to validate the commercial potential of our on-chip SLISA. The label-free, cell-based and RISE detection offered by SERS can allow development of biomedical and environmental sensor technology (BEST) needed for direct, rapid and continuous monitoring of human health and environment","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129012304","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

Underwater depth imaging using time-correlated single photon counting 水下深度成像的时间相关单光子计数

Sensing Technologies + Applications Pub Date : 2015-05-13 DOI: 10.1117/12.2176959

Aurora Maccarone, A. Mccarthy, Ximing Ren, R. Warburton, A. Wallace, James Moffat, Y. Pétillot, G. Buller

{"title":"Underwater depth imaging using time-correlated single photon counting","authors":"Aurora Maccarone, A. Mccarthy, Ximing Ren, R. Warburton, A. Wallace, James Moffat, Y. Pétillot, G. Buller","doi":"10.1117/12.2176959","DOIUrl":"https://doi.org/10.1117/12.2176959","url":null,"abstract":"We investigate the potential of a depth imaging system for underwater environments. This system is based on the timeof- flight approach and the time correlated single-photon counting (TCSPC) technique. We report laboratory-based measurements and explore the potential of achieving sub-centimeter xyz resolution at 10’s meters stand-off distances. Initial laboratory-based experiments demonstrate depth imaging performed over distances of up to 1.8 meters and under a variety of scattering conditions. The system comprised a monostatic transceiver unit, a fiber-coupled supercontinuum laser with a wavelength tunable acousto-optic filter, and a fiber-coupled individual silicon single-photon avalanche diode (SPAD). The scanning in xy was performed using a pair of galvonometer mirrors directing both illumination and scattered returns via a coaxial optical configuration. Target objects were placed in a 110 liter capacity tank and depth images were acquired through approximately 1.7 meters of water containing different concentrations of scattering agent. Depth images were acquired in clear and highly scattering water using per-pixel acquisition times in the range 0.5-100 ms at average optical powers in the range 0.8 nW to 120 μW. Based on the laboratory measurements, estimations of potential performance, including maximum range possible, were performed with a model based on the LIDAR equation. These predictions will be presented for different levels of scattering agent concentration, optical powers, wavelengths and comparisons made with naturally occurring environments. The experimental and theoretical results indicate that the TCSPC technique has potential for highresolution underwater depth profile measurements.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"303 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121738223","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: 135