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检索条件"机构=Key Laboratory of Modern Measurement&Control Technology"

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WIRELESS SPHYGMOMANOMETER BASED ON ZIGBEE

WIRELESS SPHYGMOMANOMETER BASED ON ZIGBEE

引用

2012 IEEE 2nd International Conference on Cloud Computing and Intelligence Systems

作者： Guangtao Zhuang Xiaoping Zou Changfei Guo Yan Liu Research Center for Sensor Technology Beijing Key Laboratory for sensorMinistry-of-Education Key Laboratory for Modern Measurement and Control TechnologySchool of Applied SciencesBeijing information Science and Technology UniversityJianxiangqiao CampusBeijing 100101China

The Internet of Things which is known as the third wave of the information industry is expected to become the next trillion-level information industrial engine. The development of medical care system based on The Internet of Things will be a new climax. Zigbee have played an important role in the Internet of Things. This paper introduces that wireless remote sphygmomanometer, which based on Zigbee. The zigebee will make the sphygmomanometer have the function of wireless transmission. Sphygmomanometer measures blood pressure. Then the data transmit to Zigbee wireless transmission module through a serial port. Zigbee wireless transmission module transmits the data to receiving point after processing the data.

关键词： Zigbee Sphygmomanometer Wireless CC2430

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Research on fault prediction method faced to internal combustion engine group based on IOT

Research on fault prediction method faced to internal combus...

引用

第四届国际自动化测试与仪器仪表学术会议

作者： Xu Xiaoli Jiang Zhanglei Chen Peng School of Mechanical and Vehicle Engineering Beijing Institute of Technology Key Laboratory of Modern Measurement & Control Technology Ministry of EducationBeijing Information Science and Technology University Department of Environmental Science and Engineering Faculty of Bio-resources Mie University

In order to carry out safety protection in advance and implement predictive maintenance,and also to prevent accident occurrence by using fault prediction method to reveal the fault feature.A fault prediction method faced to internal combustion engine group based on Internet of Things(IOT) is ***'s beneficial to improve the operation stability of key equipment group and promote the emerging IOT technology application in equipment *** fault prediction model mainly includes the system of remote online sample acquisition based on IOT,constructing fault prediction model coupling the physical information and numerical rules information of the mechanical systems,both to reflect the physical nature of the mechanical system,but also reflects the fault indicates numerical rules of the mechanical *** feature is used to predict fault trend in order to ensure safe and stable operation of internal combustion engine group.

关键词： internal combustion engine IOT feature extraction fault prediction

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Fault feature extraction based on optimal energy using lifting wavelet packet

Fault feature extraction based on optimal energy using lifti...

引用

2011 International Conference on Information Science and technology, ICIST 2011

作者： Xu, Xiaoli Chen, Tao Wang, Shaohong Key Laboratory of Modern Measurement and Control Technology Beijing Information Science and Technology University Beijing Institute of Technology Beijing China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science and Technology University Beijing China

ISBN: (纸本)9781424494408

Fault prediction is the key technology to guarantee the safe operation of large mechanical equipment,and fault feature extraction is a key issue in fault prediction. To extract fault feature from the non-stationary fault signals, this paper proposed a fault feature extraction method using lifting wavelet packet, and constructed the fault feature vector of optimal energy. The fault feature extraction analysis shows that the proposed method can highlight the energy change within the optimal decomposition frequency band, and effectively reflect the fault status. © 2011 IEEE.

关键词： Feature extraction

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Remote monitoring and control of photovoltaic system using wireless sensor network

Remote monitoring and control of photovoltaic system using w...

引用

International Conference on Electric Information and control Engineering

作者： Xu, Xiaoli Qiao, Daoe Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science and Technology University Beijing China

ISBN: (纸本)9781424480395

Efficient energy yield is a major concern in photovoltaic systems in solar energy supply. Smart photovoltaic modules offer a potential solution to allow solar generators to maximize their productivity. This paper describes details of the design and instrumentation of smart photovoltaic modules, a wireless sensor network, and software for real-time sensing and control of a photovoltaic system with maximum power point tracking at module level. Field condition is monitored by voltage, current, irradiance, and temperature sensors distributed across the photovoltaic field. The sensory data are periodically sampled and transmitted to a base station. The power point is controlled by a integrated DC-DC converter. The output voltage in the converter is regulated by a digital controller. The reference voltage is calculated based on a neural network model, which is used to identify maximum power point. The communication data for remote monitoring and distributed control are successfully transmitted using a low-cost ZigBee wireless network. The web-based software developed in this paper offers stable remote access to field conditions and real-time control of the power points in the smart photovoltaic system. © 2011 IEEE.

关键词： Solar energy

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IFDS operation mechanism and its implementation

IFDS operation mechanism and its implementation

引用

2011 International Conference on Electric Information and control Engineering, ICEICE 2011

作者： Liu, Qiushuang Xu, Xiaoli School of Mechanical Engineering Beijing Institute of Technology China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science and Technology University China

ISBN: (纸本)9781424480395

In order to deal better with the changeful market demand, based on IFDS for modern instrument manufacturing, people make researches on the product family and the operation mechanism of IFDS. In the design process, first, people determine the variants of products through grid dividing markets;and then find main related design parameters in the product family. In order to establish flexible product platform, people have to find out the core structure of a product and refine its public module and flexible module by the aid of IFDS operation mechanism;and finally add specific elements to the platform. In the end, the author takes the development of the product family of concentrator solar energy system for example to prove the effectiveness of this method. © 2011 IEEE.

关键词： Product design

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Method for diagnosing photovoltaic array fault in solar photovoltaic system

Method for diagnosing photovoltaic array fault in solar phot...

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Asia-Pacific Power and Energy Engineering Conference

作者： Xu, Xiaoli Wang, Huan Zuo, Yunbo School of Mechanical Engineering Beijing Institute of Technology Beijing China Key Laboratory of Modern Measurement and Control Technology Beijing Information Science and Technology University Beijing China

ISBN: (纸本)9781424462551

Solar photovoltaic(PV) array power generation, as a utilization form of solar energy, has been widely applied in solar generator systems throughout the world. Effective guarantee of PV array normal power generation, rapid and accurate detection of fault location and the prediction of fault occurrence are of great significance. This paper, based on the analysis of solar photovoltaic power generation performance, raises new voltage and current detection method. The original current and voltage detection method can not distinguish the environmental factors which causes the decrease in power generation capacity. This new test method can overcome such defect, and can accurately judge the location where cell array fault occurs;this technology is very important to safe and reliable operation of solar photovoltaic generation system and the improvement of power generation efficiency. © 2011 IEEE.

关键词： Fault detection

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Flue gas turbine condition trend prediction based on improved echo state network

Flue gas turbine condition trend prediction based on improve...

引用

International Conference on Measuring technology and Mechatronics Automation

作者： Wang, Shaohong Chen, Tao Xu, Xiaoli School of Mechanical Engineering Beijing Institute of Technology Beijing 100081 China Ministry of Education Key Laboratory for Modern Measurement and Control Technology Beijing Information Science and Technology University Beijing 100192 China

ISBN: (纸本)9780769542966

Fault prediction is the key technology for ensuring safe operation and scientific maintenance of large equipment. As the running of flue gas turbine has nonlinear characteristics, echo state network (ESN) was introduced to predict the condition trend of the turbine. Singular value decomposition was used to improve the linear regression algorithm of ESN, and the prediction workflow was given. Condition trend prediction results showed the effectiveness of the proposed method. © 2011 IEEE.

关键词： Flue gases

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PCA-AR based fault prognosis for turbine machine

PCA-AR based fault prognosis for turbine machine

引用

2011 IEEE International Conference on Mechatronics and Automation, ICMA 2011

作者： Wang, Qiuyan Ma, Jie Xu, Xiaoli Department of Automation Beijing Information Science and Technology University Beijing 100192 China Key Laboratory of Modern Measurement and Control Ministry of Education Beijing Information Science and Technology University Beijing 100192 China

ISBN: (纸本)9781424481149

In this paper, a multivariate fault prognosis approach based on statistical process monitoring (SPM) methods and time series prediction for turbine machine was proposed. A principal component analysis (PCA) model using sample data under normal state was built. Firstly, fault is detected by squared prediction error (SPE) index, then predicted by AR model. With development of fault process, the SPE will produce a corresponding change and carry important fault information, so calculate statistics of SPE can be characterized and predict the trend of fault and level. A case study on the huge stack gas turbine shows the efficiency of the proposed approach. © 2011 IEEE.

关键词： Principal component analysis

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Adaptive sliding mode control of electromechanical actuator with improved parameter estimation

Adaptive sliding mode control of electromechanical actuator ...

引用

作者： Li, Hao Bai, Yongqiang Su, Zhong School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Beijing Institute of Technology Ministry of Education Beijing 100081 China Key Laboratory of Modern Measurement and Control Technology Beijing Information Science and Technology University Ministry of Education Beijing 100101 China

ISBN: (纸本)9788995605646

An adaptive sliding mode control scheme for electromechanical actuator has been presented. The adaptive control strategy can estimate the uncertain parameters and adaptively compensate the modeled dynamical uncertainties, while the sliding mode control method overcomes the unmodelled dynamics. In the adaptive law an equivalent output injection of the sliding mode observer which contains the parameter estimation error is used, and estimates of parameters can approximate the true values without prediction-error that is typically used in compositive adaptive law. Due to the improved estimation of uncertain parameters, the sliding mode law can robustifies the design against model uncertainties with a small swithcing gain. Stability of the system with the proposed approach has been proved and it has also been shown that the system states can reach the sliding mode in finite time. Finally, the effectiveness of the proposed control scheme has been exhibited via simulation examples. © 2011 Asian control Association.

关键词： Parameter estimation

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Flexible Evaluation System for the Flexible Platform Oriented Towards the Research and Development of modern Instruments

Flexible Evaluation System for the Flexible Platform Oriente...

引用

2011 China control and Decision Conference(2011中国控制与决策会议 CCDC)

作者： Qiushuang Liu Guoxin Wu Xiaoli Xu Beijing Institute of Technology BeijingCO100192China Key Laboratory of Modern Measurement & Control Technology (Ministry of Education) Beijing Informatio

In order to improve the flexible platform oriented towards the research and development of modern instruments, the concept and connotation of “flexible” and “the connotation of the flexible platform oriented towards the research and development of modern instruments” is explained;The flexible evaluation method is provided. The creation of research and development of modern instruments is oriented and optimized by flexibility measurement system of flexible platform.

关键词： Instruments IFDS System Integratability Flexible Evaluation System

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