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高炉炉身、炉腹温度在线检测传感系统
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作者 董大明 孙一博 +4 位作者 李丽荣 孙采鹰 潘刚 颉新春 黄森 《工业仪表与自动化装置》 2017年第6期72-74,共3页
以红外测温原理为基础,考虑到高炉炉身、炉腹复杂工况条件,提出一种针对高炉炉身、炉腹温度的在线检测方法,并通过软件实现系统温度在线检测。系统由热辐射传播介质、光电转换模块、无线发射模块、无线接收模块和上位机5部分组成。该文... 以红外测温原理为基础,考虑到高炉炉身、炉腹复杂工况条件,提出一种针对高炉炉身、炉腹温度的在线检测方法,并通过软件实现系统温度在线检测。系统由热辐射传播介质、光电转换模块、无线发射模块、无线接收模块和上位机5部分组成。该文着重阐述光电转换模块的组成,从发射频率、CCD摄像机、灵敏度等几个角度进行分析,从而为温度在线检测系统提供理论依据。 展开更多
关键词 高炉 炉身炉腹 温度 检测传感系统
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油罐计量中的光纤传感检测系统 被引量:4
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作者 郑平 吴明 张国忠 《石油化工设备》 CAS 2010年第2期70-73,共4页
介绍了利用光纤传感技术研制的一种新型油品储罐液位和温度测量系统。该系统通过力的平衡原理测量液位,利用光纤特性随温度变化的原理测量温度,采用光纤传感器探测和传输信号,能够对油罐群进行多点、多参量(液位、温度、油水界面等)、... 介绍了利用光纤传感技术研制的一种新型油品储罐液位和温度测量系统。该系统通过力的平衡原理测量液位,利用光纤特性随温度变化的原理测量温度,采用光纤传感器探测和传输信号,能够对油罐群进行多点、多参量(液位、温度、油水界面等)、在线、高精度、数字化和远距离传输测量。现场应用表明,该系统的各项性能指标符合生产要求,运行稳定,性能可靠。该系统的应用改变了油品储罐液位和温度测量靠人工读数工作效率低、误差大,而且无法实现自动化控制和管理的状况。 展开更多
关键词 油罐 液位 温度 光纤检测系统 测量
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光纤传感振动检测系统及其实验研究 被引量:6
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作者 朱启荣 方如华 +2 位作者 曾伟明 曹正元 张林春 《力学季刊》 CSCD 北大核心 2004年第1期46-50,共5页
实际工程结构中的振动检测是十分重要的,也是十分复杂的,常用的结构振动检测传感器易受工程现场恶劣环境的影响,而光纤传感器具有小巧、抗电磁干扰、灵敏度高、适合长期监测等优点。本文建立了基于马赫—曾德(Mech-Zehnder)干涉原理的... 实际工程结构中的振动检测是十分重要的,也是十分复杂的,常用的结构振动检测传感器易受工程现场恶劣环境的影响,而光纤传感器具有小巧、抗电磁干扰、灵敏度高、适合长期监测等优点。本文建立了基于马赫—曾德(Mech-Zehnder)干涉原理的光纤传感振动检测系统,研制了运用先进的数字信号处理技术采集和处理数据的专用软件,并在典型结构件——钢制悬臂梁结构上进行了外加信号作用下的强迫振动检测和冲击载荷作用下的自由衰减振动检测,测量了该结构件的频率及振幅,其结果与同时进行的成熟的电测结果相近,说明光纤传感器用于结构件的振动测量是可靠的。本文为光纤传感器应用于实际工程的振动检测提供了新的技术装置,具有工程应用前景。 展开更多
关键词 光纤 数字信号处理 马赫-曾德干涉原理 光纤振动检测系统 结构振动
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基于物联网技术的井下安全网络传感检测控制系统构建的研究 被引量:3
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作者 陈国庆 《电子世界》 2014年第6期1-2,共2页
物联网技术与移动通信领域的CDMA技术以及GSM网不同的是,物联网服务对象是工业现场自动化控制数据传输,这种技术简单,使用方便,工作可靠,价格低,采用物联网技术减少了井下人员数量减低了工作强度,有助于矿井的精确监控与矿井自动化的实... 物联网技术与移动通信领域的CDMA技术以及GSM网不同的是,物联网服务对象是工业现场自动化控制数据传输,这种技术简单,使用方便,工作可靠,价格低,采用物联网技术减少了井下人员数量减低了工作强度,有助于矿井的精确监控与矿井自动化的实现本文会从物联网技术传感检测系统的信号控制方面做一些探究与讨论。 展开更多
关键词 物联网技术 检测控制系统 系统构建
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基于FPGA的光纤传感气体检测系统的实现 被引量:4
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作者 季兴安 熊凌 +1 位作者 李家荣 王兴 《光通信技术》 CSCD 北大核心 2011年第10期41-43,共3页
工矿行业环境中有害气体的检测直接关系到工作人员的生命安全,传统的光纤传感气体检测系统,硬件结构复杂、抗电磁干扰能力弱,检测的气体浓度不准确。项目结合FPGA技术,利用硬件编程语言VerilogHDL设计硬件电路,替代了传统的DDS、倍频、... 工矿行业环境中有害气体的检测直接关系到工作人员的生命安全,传统的光纤传感气体检测系统,硬件结构复杂、抗电磁干扰能力弱,检测的气体浓度不准确。项目结合FPGA技术,利用硬件编程语言VerilogHDL设计硬件电路,替代了传统的DDS、倍频、移相等复杂硬件结构。在抗干扰性和精度上都有了很大提高,优化了传统的检测系统。 展开更多
关键词 光纤检测系统 FPGA VERILOGHDL DDS
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集成恒温和搅拌功能的小型化、高精度电化学传感检测系统的设计与实现
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作者 武文斌 焦宇涛 +3 位作者 孙鹏 成林洋 赵二刚 岳钊 《南开大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第1期79-85,共7页
出于生化量现场便携检测的目的,同时为了提高传感检测系统的集成度和适用范围,将恒温控制、磁力搅拌和高精度电化学检测相结合,设计了一种小型化、多功能、高精度电化学传感检测系统.系统硬件端采用微控制器搭配信号处理、驱动控制和电... 出于生化量现场便携检测的目的,同时为了提高传感检测系统的集成度和适用范围,将恒温控制、磁力搅拌和高精度电化学检测相结合,设计了一种小型化、多功能、高精度电化学传感检测系统.系统硬件端采用微控制器搭配信号处理、驱动控制和电源管理等芯片完成电路硬件设计,同时选用微型的电机和加热装置等器件,实现整个检测系统的小型化;软件端不仅在硬件电路中加入操作系统,并且结合上位机程序,实现电化学检测、恒温控制、磁力搅拌、实时显示和数据存储多种功能.电化学检测部分采用低噪声芯片配合后端滤波电路提高了电化学传感检测精度,恒温控制部分加入了比例积分微分算法来提高精度.经过验证,检测系统整体体积为30 cm×30 cm×30 cm,可完成计时电流法、循环伏安法等多种电化学检测功能,电流测量精度可低至0.15 n A,恒温控制精度可达到±0.3℃,搅拌转速精度可达到4%.测量数据验证了所研发的电化学传感检测系统的可靠性和实用性. 展开更多
关键词 电化学 恒温控制 高精度 检测系统 小型化
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设施园艺作物生长信息智能化检测装备的创新设计 被引量:5
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作者 李惠玲 张晓东 +3 位作者 李苇 申婷婷 黄健荣 朱寒豹 《现代农业装备》 2020年第5期30-35,41,共7页
设施园艺智能化装备技术是现代设施农业发展的迫切需要。温室作物生长信息智能化监测装备能够对作物的营养、长势和环境信息进行综合监测,为温室的水肥和环境优化调控提供科学依据,是设施园艺智能化的关键装备,本研究针对不同生长阶段... 设施园艺智能化装备技术是现代设施农业发展的迫切需要。温室作物生长信息智能化监测装备能够对作物的营养、长势和环境信息进行综合监测,为温室的水肥和环境优化调控提供科学依据,是设施园艺智能化的关键装备,本研究针对不同生长阶段和不同株形作物的检测需求以及温室非结构化环境的作业需要,开发了能够在温室内自主巡航的轮式和履带式作物生长及环境信息监测系统;同时,为了满足大株型作物的检测需求,还开发了悬轨式作物生长和环境信息检测系统,该系统将多传感检测系统通过云台悬挂安装在温室桁架内的回旋轨道上,由于检测位置较高,能够对黄瓜、番茄等较大株型的温室作物实现定时巡航生长监测。为了实现作物生长信息的全面探测,研发了园艺作物信息多传感检测系统,利用可见光—近红外双目多光谱相机、红外探测传感器、激光测距传感器以及环境温湿度和光照传感器等仪器设备,通过多传感信息融合,实现了设施园艺作物营养、长势和环境信息的综合监测,取得了较好的应用效果。 展开更多
关键词 设施园艺 生长信息 智能检测 检测系统 信息融合
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New Monitoring Technologies for Overhead Contact Line at 400 km.h-1 被引量:2
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作者 Chul.Jin Cho Young Park 《Engineering》 SCIE EI 2016年第3期360-365,共6页
Various technologies have recently been developed for high-speed railways, in order to boost commercial speeds from 300 km.h: to 400 km.h-1. Among these technologies, this paper introduces the 400 km-h-1 class curren... Various technologies have recently been developed for high-speed railways, in order to boost commercial speeds from 300 km.h: to 400 km.h-1. Among these technologies, this paper introduces the 400 km-h-1 class current collection performance evaluation methods that have been developed and demonstrated by Korea. Specifically, this paper reports details of the video-based monitoring techniques that have been adopted to inspect the stability of overhead contact line (OCL) components at 400 km.h-1 without direct contact with any components of the power supply system. Unlike conventional OCL monitoring systems, which detect contact wire positions using either laser sensors or line cameras, the developed system measures parameters in the active state by video data. According to experimental results that were obtained at a field-test site established at a commercial line, it is claimed that the proposed mea- surement system is capable of effectively measuring OCL parameters. 展开更多
关键词 High-speed railway Overhead contact lines Condition monitoring Image processing based measurement
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Design and application of electrical fire monitoring system in mining industry 被引量:3
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作者 Diao Jinxia Zhang Guilin +2 位作者 Hu Haidong Zou Zhihui Zhang Baojin 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第2期305-310,共6页
To protect mining areas from electrical fire, it is very important to install electrical nre momtormg system to ensure safety in development of mineral resources and for buildings. In this paper, design for electrical... To protect mining areas from electrical fire, it is very important to install electrical nre momtormg system to ensure safety in development of mineral resources and for buildings. In this paper, design for electrical fire monitoring and detection system with optional sensor modules has been proposed. In addition, necessity and suitability of electrical fire monitoring and detection system with optional sensor modules in mining areas have been reviewed. The designed electrical fire monitoring and detection system suit- able for work environment of mining industry is composed by host-computer monitoring software and slave-computer detectors. Monitoring detectors are manufactured by using embedded technology. Exter- nal shells deployed have superior enclosure performances and explosion-proof properties. It is easy to install and maintain the system. In general, the system has reached, or even exceeded standards specified in national standards for performances and appearances of such devices. Test results show application of electrical fire monitoring and detection system can effectively enhance monitoring intensity over the mining areas and provide reliable guarantee to ensure orderly development of mineral resources and to protect physical and property safety of citizens in these areas. 展开更多
关键词 Mineral resource Electrical fire Aftercurrent Monitoring detector Intelligent building
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基于概念设计的木料螺旋挤压机方案设计
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作者 夏翔 徐学林 《木工机床》 2003年第4期10-12,4,共4页
本设计利用机械系统概念设计中机电一体化的设计原成理。将整个进料系统分解为三个子系统,既广义传动及执行机构子系统、传感检测子系统、信息处理及控制子系统。
关键词 系统概念设计 广义动及执行机构子系统 检测系统 信息处理及控制子系统 螺旋木料挤压机 数学模型 方案设计
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Research on the Strategy of Underwater United Detection Fusion and Communication Using Multi-sensor
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作者 Zhenhua Xu Jianguo Huang Hai Huang Qunfei Zhang 《Journal of Marine Science and Application》 2011年第3期358-363,共6页
In order to solve the distributed detection fusion problem of underwater target detection, when the signal to noise ratio (SNR) of the acoustic channel is low, a new strategy for united detection fusion and communicat... In order to solve the distributed detection fusion problem of underwater target detection, when the signal to noise ratio (SNR) of the acoustic channel is low, a new strategy for united detection fusion and communication using multiple sensors was proposed. The performance of detection fusion was studied and compared based on the Neyman-Pearson principle when the binary phase shift keying (BPSK) and on-off keying (OOK) modes were used by the local sensors. The comparative simulation and analysis between the optimal likelihood ratio test and the proposed strategy was completed, and both the theoretical analysis and simulation indicate that using the proposed new strategy could improve the detection performance effectively. In theory, the proposed strategy of united detection fusion and communication is of great significance to the establishment of an underwater target detection system. 展开更多
关键词 detection fusion likelihood ratio test(LRT) Neyman-Pearson (NP) low signal to noise ratio
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Optically Powered Pressure Sensor with Optical Fiber Link
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作者 LIU Zhiyan WANG Yutian(Yanshan University. Qinhuangdao 066004. CHN) 《Semiconductor Photonics and Technology》 CAS 1996年第1期18-24,共7页
An optically powered sensor for measuring pressure which is linked by optical fiber is developed in new scheme. Its pulse position modulation (PPM) optical signal and optical supply power for electronics in probe are... An optically powered sensor for measuring pressure which is linked by optical fiber is developed in new scheme. Its pulse position modulation (PPM) optical signal and optical supply power for electronics in probe are transmitted via a single optical fiber. The optical power is carried by a 1 300 nm laser diode (LD) and the sensing data are carried by a 850 nm LED. The remote probe uses all CMOS chips and particular modulations (PPM and PWM). Its electrical consumption including signal manipulation and LED driven current from optically converted is less than 100 μW. The laser diode supplies 5 mW optical power into the fiber. A photodetector converts sufficiently this power into electrical power to drive the whole probe operation. The optically powered distance gets up to 500 m. The novel sensor combines optical fiber and electronics technology into a system. Because of using the principle of ratio measurement between measured and reference signals, as well as light feedback,the system is available with high reliable, outstanding accuracy and repeatability. 展开更多
关键词 Pressure Sensors Signal Detection Optical Fiber Measurement System
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机电一体化产品的基本特征及其功能求解模型
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作者 邹慧君 张青 郭为忠 《机械设计与研究》 CSCD 2004年第z1期85-89,共5页
阐述了机电一体化产品的基本特征、基本组成和机电一体化产品的核心子系统,提出了机电一体化产品功能求解模型,研究了功能原理和工艺动作过程的构思、工艺动作过程分解和实现工艺动作的广义执行机构解等一系列关键问题.
关键词 现代机械系统 广义执行机构子系统 检测系统 信息处理和控制子系统 FPAM功能求解模型 工艺动作过程构思
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Generalized Approach to Signal Processing in CollaborativeWireless Sensor Systems for Target Detection
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作者 Vyacheslav Tuzlukov 《Computer Technology and Application》 2011年第5期358-369,共12页
Collaboration in wireless sensor systems must be fault-tolerant due to the harsh environmental conditions at which such systems can be deployed. This paper focuses on finding the signal processing algorithms for colla... Collaboration in wireless sensor systems must be fault-tolerant due to the harsh environmental conditions at which such systems can be deployed. This paper focuses on finding the signal processing algorithms for collaborative target detection based on the generalized approach to signal processing (GASP) in the presence of noise. The signal processing algorithms are efficient in terms of communication cost, precision, accuracy, and number of faulty sensors tolerable in the wireless sensor systems. Two types of generalized signal processing algorithms, namely, value fusion and decision fusion constructed according to GASP in the presence of noise, are identified first. When comparing their performance and communication overhead, the decision fusion algorithm is found to become superior to the value fusion algorithm as the ratio of faulty sensors to fault free sensors increases. The use of GASP under designing the value and decision fusion algorithms in wireless sensor systems allows us to obtain the same performance, but at low values of signal energy, as well as under employment of the universally adopted signal processing algorithms widely used in practice. 展开更多
关键词 Target detection generalized receiver probability of detection probability of false alarm wireless sensor system.
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An Experience of On-site PD Testing for Condition Monitoring of an 11 kV PILC Cable Insulation System
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作者 Xiaosheng Peng Chengke Zhou Xiaodi Song 《Journal of Energy and Power Engineering》 2012年第1期140-145,共6页
A cable circuit of a substation in the United Kingdom showed high level of PD activities during a survey using hand hold PD testing equipment. The authors were invited to carry out on-site PD testing experiment to fur... A cable circuit of a substation in the United Kingdom showed high level of PD activities during a survey using hand hold PD testing equipment. The authors were invited to carry out on-site PD testing experiment to further diagnose and locate the potential problem of the cable system. This paper presents the experience of the present authors carrying out the cable test. Following a brief introduction to the experiment equipments and physical connections, the paper analyses the data collected from the testing, including PD pulse shape analysis, frequency spectrum analysis and phase resolved PD pattern analysis. Associated with PD propagation direction identification, PD source diagnosis and localisation was made. Four different types of sensors, which were adapted during the testing, are shown to have different frequency bandwidths and performed differently. Aider comparing the parameters of the sensor and the PD signals detected by individual sensor, optimal PD monitoring bandwidth for cable system is suggested. 展开更多
关键词 PD identification on-site testing PILC cable switchgear box insulation defect PD propagation direction sensor.
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Distributed optical fiber vibration sensing system based on polarization detection 被引量:11
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作者 刘佳 于晋龙 +3 位作者 郭精忠 高超 王文睿 杨恩泽 《Optoelectronics Letters》 EI 2011年第6期458-462,共5页
A novel distributed optical fiber vibration sensing system based on polarization detection is proposed and demonstrated. A Faraday rotator mirror is employed at the end of the system, which eliminates the slow polariz... A novel distributed optical fiber vibration sensing system based on polarization detection is proposed and demonstrated. A Faraday rotator mirror is employed at the end of the system, which eliminates the slow polarization variation of signal light and only responses to rapid polarization change caused by external vibration interference. Based on the sensing signal characteristics, the location of polarization disturbance point can be detected accurately. Experiments on polarization controller simulation and actual vibration detection show that a higher localization accuracy better than 1% is successfully obtained in 13.8 kin, 21.2 km and 35.8 km sensing fibers systems. 展开更多
关键词 Optical fibers SENSORS Signal detection Slow light
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Recent Advancement in Optical Fiber Sensing for Aerospace Composite Structures 被引量:5
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作者 Shu MINAKUCHI Nobuo TAKEDA 《Photonic Sensors》 SCIE EI CAS 2013年第4期345-354,共10页
Optical fiber sensors have attracted considerable attention in health monitoring of aerospace composite structures. This paper briefly reviews our recent advancement mainly in Brillouin-based distributed sensing. Dama... Optical fiber sensors have attracted considerable attention in health monitoring of aerospace composite structures. This paper briefly reviews our recent advancement mainly in Brillouin-based distributed sensing. Damage detection, life cycle monitoring and shape reconstruction systems applicable to large-scale composite structures are presented, and new technical concepts, "smart crack arrester" and "hierarchical sensing system", are described as well, highlighting the great potential of optical fiber sensors for the structural health monitoring (SHM) field. 展开更多
关键词 Carbon fiber reinforced plastic (CFRP) Brillouin-based system fiber Bragg grating (FBG)
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Fiber Bragg Grating (FBG) Sensors Used in Coal Mines 被引量:4
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作者 Jinyu WANG Tongyu LIU +4 位作者 Guangdong SONG Hongjing XIE Lianqing LI Xiaolin DENG Zhijie GONG 《Photonic Sensors》 SCIE EI CAS 2014年第2期120-124,共5页
The fiber Bragg grating (FBG) strain sensors were used for on-line monitoring of the stress variation of the lined wall in the gateway retained along the goaf of No. 3203 coal mining face in Dongtan Mine. The result... The fiber Bragg grating (FBG) strain sensors were used for on-line monitoring of the stress variation of the lined wall in the gateway retained along the goaf of No. 3203 coal mining face in Dongtan Mine. The results showed that the FBG strain sensor with the wide measuring range could measure the stress variation accurately during the support process of the gateway retained along the goaf and could provide the basis to further optimize the support structure and to determine the support plan of the gateway retained along the goaf. The FBG micro-seismic sensors were used in Xinglong Mine to detect the micro-seismic signal. The signals were well received and analyzed to determine the location and energy level of the source of the micro-seismic event warning. The FBG sensors and detecting system show a significant potential for micro-seismic detection and geological disasters detection. 展开更多
关键词 FB stress sensor acceleration sensor stress monitoring micro-seismic activity seismic signal
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Development and characterization of a microfluidic glucose sensing system based on an enzymatic microreactor and chemiluminescence detection 被引量:2
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作者 MOON B.-U. de VRIES M.G. +1 位作者 WESTERINK B.H.C. VERPOORTE E. 《Science China Chemistry》 SCIE EI CAS 2012年第4期515-523,共9页
Chemiluminescence detection was developed as an alternative to amperometric detection for glucose analysis in a portable, microfluidicsbased continuous glucose monitoring system. Amperometric detection allows easy det... Chemiluminescence detection was developed as an alternative to amperometric detection for glucose analysis in a portable, microfluidicsbased continuous glucose monitoring system. Amperometric detection allows easy determination of hydrogen peroxide, a product of the glucose oxidasecatalyzed reaction of glucose with oxygen, by oxidation at a microelectrode. However, (micro)electrodes in direct contact with physiological sample are subject to electrode fouling, which leads to signal drift, decreased reproducibility and shortened detector lifetimes. Moreover, there are a few species present in the body (e.g. ascorbic acid, uric acid) which can undergo oxidation at the same applied potential as hydrogen peroxide. These species can thus inter- fere with the glucose measurement, reducing detection specificity. The rationale for exploring chemiluminescence as opposed to amperometric detection is thus to attempt to improve the lifetime and reproducibility of glucose analysis for monitoring purposes, while reducing interference caused by other chemicals in the body. The study reported here represents a first step in this direction, namely the realization of a microfluidic device with integrated silicon photodiode for chemiluminescence detection of glucose. This microflow device uses a chaotic mixing approach to perform enzymatic conversion of glucose, followed by reaction of the hydrogen peroxide produced with luminol to produce light at 425 nm. The chemil reaction is catalyzed by horseradish peroxidase in the presence of iodophenol. The performance of the fabricated chip was characterized to establish optimal reaction conditions with respect to sample and reagent flow rates, pH, and concentrations. A linear calibra- tion curve was obtained for current response as a function of glucose concentration in the clinically relevant range between 2 and 10 mM, with a sensitivity of 39 pA/mM (R = 0.9963, one device, n = 3) and a limit of detection of 230 ktM (S/N - 3). 展开更多
关键词 microfluidic chip glucose sensing system enzymatic microreactor chemiluminescence chaotic mixing
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Nanoparticles-based nanochannels assembled on a plastic flexible substrate for label-free immunosensing
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作者 Alfredo de la Escosura-Muniz Marisol Espinoza-Castaneda +2 位作者 Madoka Hasegawa Laetitia Philippe Arben Merkoci 《Nano Research》 SCIE EI CAS CSCD 2015年第4期1180-1188,共9页
A novel, cheap, disposable and single-use nanoparticles-based nanochannel platform assembled on a flexible substrate for label-free immunosensing is pre- sented. This sensing platform is formed by the dip-coating of a... A novel, cheap, disposable and single-use nanoparticles-based nanochannel platform assembled on a flexible substrate for label-free immunosensing is pre- sented. This sensing platform is formed by the dip-coating of a homogeneous and assembled monolayer of carboxylated polystyrene nanospheres (PS, 200 and 500 nm-sized) onto the working area of flexible screen-printed indium tin oxide/polyethylene terephthalate (ITO/PET) electrodes. The spaces between the self-assembled nanospheres generate well-ordered nanochannels, with inter-PS particles distances of around 65 and 24 nm respectively. The formed nanochannels are used for the effective immobilization of antibodies and subsequent protein detection based on the monitoring of [Fe(CN)6]^4- flow through diffusion and the decrease in the differential pulse voltammetric signal upon immunocomplex formation. The obtained sensing system is nanochannel-size dependent and allows human immunoglobulin G (IgG) (chosen as a model analyte) to be detected at levels of 580 ng/mL. The system also exhibits an excellent specificity against other proteins present in real samples and shows good performance with a human urine sample. The developed device represents an integrated and simple biodetection system which overcomes many of the limitations of previously reported nanochannels-based approaches and can be extended in the future to several other immuno and DNA detection systems. 展开更多
关键词 NANOCHANNEL dip-coating.electrochemical biosensor label-free immunosensing
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