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检索条件"主题词=Laboratory Virtual Instrumentation Engineering Workbenc"

共 98 条记录，以下是81-90 订阅

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Remotely Accessible Wind-Tunnel Measurement Platform for Academic Purposes

Remotely Accessible Wind-Tunnel Measurement Platform for Aca...

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IEEE Conference on Power Electronics and Renewable Energy (CPERE)

作者： Mohanad Odema Ihab Adly Hani Ghali Ahmed El-Baz Amr Abdelkader Centre for Emerging Learning Technologies (CELT) The British University in Egypt Cairo Egypt The British University in Egypt Cairo Egypt

ISBN: (纸本)9781728109114

This paper presents the design, development and implementation of a remotely accessible wind-tunnel testing platform. NI CompactDAQ has been selected to act as the primary control unit, which is connected to the host PC with the developed web-application to enable the remote accessibility. The web-application has been developed based on LabVIEW to ensure smooth compatibility with the NI device. The web-application includes multiple-interfaces corresponding to different measurement scenarios. This includes; 1) variable speed operation of the wind-tunnel fan, 2) three force balance to measure drag, lift and moment forces on a test airfoil within the tunnel test section, 3) torque and rpm of an external rotor. Testing has been performed both on-site and remotely, where no measurement delay has been observed in the online testing. The implemented testing platform serves for both undergraduate students as well as postgraduates in relevant courses related to wind-energy.

关键词： Wind-tunnel Wind-energy Remote testing Online testing LabVIEW on line detection wind tunnels laboratory virtual instrumentation engineering workbenc Wind energy telemetry detection zone

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Detection of TATP Precursors with MOX gas sensors combined with Solid Phase Micro Extraction

Detection of TATP Precursors with MOX gas sensors combined w...

引用

IEEE Sensors Conference

作者： Jesús Lozano José Ignacio Suárez José Manuel Ordiales Teodoro Aguilera Research Group on Sensory Systems University of Extremadura Badajoz Spain

ISBN: (纸本)9781467346412

We present here a system for the detection of TATP precursors based on Headspace Solid Phase Micro Extraction (SPME) as sampling method and Tin Oxide gas sensors. The system includes a nitrogen bottle with a gas flowmeter connected to the injector of a gas chromatograph. The cell containing a tin dioxide multisensor was mounted inside the chromatograph oven connected to the injector, replacing the chromatographic column. The sensor response is measured using a Keithley K2700 with a 20-channel switch and connected trough GPIB interface to a computer. A program developed in Labview controls the system. The program displays and controls the measurement parameters and generates the response database. Multivariate analyses like Principal Component Analysis (PCA) and Artificial Neural Networks (ANN) have been applied to the data to discriminate among the different group of samples. The results show that both the precursors of TATP and the interferents measured are detected with the designed system.

关键词： Precursors TATP Detection Gas sensors precursors jet device measurement parameter headspace solid phase microextraction gas flowmeter Solid phases design system laboratory virtual instrumentation engineering workbenc MOXD1 gene mixed oxides stannic oxide sampling methods injectors sensor response

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An HF Digital Communication System Based on Software-Defined Radio

An HF Digital Communication System Based on Software-Defined...

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Smart Technology and Applications (ICoSTA), 2020 International Conference on

作者： Agung Wicaksono Achmad Mauludiyanto Gamantyo Hendrantoro Dept. of Electrical Engineering Institut Teknologi Sepuluh Nopember Surabaya Indonesia

ISBN: (数字)9781728130835

ISBN: (纸本)9781728130842

High Frequency (HF) communication systems use radio waves at frequencies in the range of 3-30 MHz propagating in the form of skywave with the help of the ionosphere. For emergency communication applications, the HF communication system is expected to send text messages by implementing a digital communication system. This paper presents the design of the HF digital communication system on a Software-Defined Radio (SDR) platform for easy implementation. To achieve a good error rate performance, the AX.25 protocol is used at the data link layer. The system performance is evaluated by measuring Signal to Noise Ratio (SNR), Bit Error Rate (BER), Character Error Rate (CER), and Frame Error Rate (FER) with and without the AX.25 protocol. The results show that the system has been successfully implemented on the USRP platform with LabView as the user interface, while the use of the AX.25 protocol generates a zero error rate.

关键词： HF digital communication system software-defined radio (SDR) error rate AX.25 protocol. Error analysis Software radio COMMUNICATION SYSTEMS Digital communication systems System performance User Interface Device Component Bit error rate laboratory virtual instrumentation engineering workbenc Hf(hafnium) frequency ranges radio waves signal to noise ratios High frequency ionospheres

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Quasi-noise illumination in mm-wave imaging: from concept to realization

Quasi-noise illumination in mm-wave imaging: from concept to...

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IEEE Convention of Electrical and Electronics Engineers in Israel

作者： Boris Kapilevich Yosef Pinhasi Michael Anisimov Boris Litvak Danny Hardon Ariel University Center of Samaria Department of Electrical and Electronics Eng.

ISBN: (纸本)9781467346825

The paper describes the W-band single-pixel imaging detector with a pulse-noise source in the Tx-channel and the direct detecting circuitry in the Rx-channel. The detector is maintained on X-Y programmable scanner controlled by LabView interface which is integrated with MatLab used for online image reconstruction. The application of an incoherent illumination generated by the frequency-limited quasi noise source improves image quality compared with the coherent mode widely used in conventional active imagers.

关键词： Noise sources image reconstruction millimeter wave MATLAB Image quality incoherent illumination illumination Lighting imaging detector imaging instrument laboratory virtual instrumentation engineering workbenc Electric circuits PROGRAMMABLE Scanner

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Development of a Portable 12 Lead ECG Signal Acquisition System using National Instruments' MyRio-1900

Development of a Portable 12 Lead ECG Signal Acquisition Sys...

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International Conference on Electrical, Control and instrumentation engineering (ICECIE)

作者： Engr. Stanley Glenn E. Brucal Engr. Sergio R. Peruda Daichi A. Cabesas Elliah James C. Ramos Jeane Dominique A. Roa Tristan John Dwayne R. Tuico School of Engineering Asia Pacific College Makati City Philippines

ISBN: (纸本)9781728139401

The 12-Lead ECG using NI MYRIO 1900 is a portable device for acquisition of heart signals to be used in interpretation and analysis. The rural areas of the Philippines have few health professionals, and high cost of healthcare services, making people inaccessible to primary healthcare including heart health. This portable medical device can be very useful for them. A portable electrocardiograph (ECG) can help the people monitor heart conditions much easier because of its accessibility and easy-to-understand functions. This device is developed using graphical programming through NI LabView and a reconfigurable input/output device which is NI MyRIO 1900. It can produce ECG values of Heart Rate, QRS Duration and QT Interval of patients of different ages and have interpretation and Data Analytics. During the system testing, the ECG values obtained from the device were compared to the ECG values of the same patients obtained from the conventional ECG test done in hospitals and clinics. The system achieved an accuracy rate of 90.68 percent. The results of this study show that the system can benefit the community on having an on-hand analysis of their primary heart status.

关键词： ECG portable MyRIO LabView Data Analytics Electrocardiography electrochemical grinding laboratory virtual instrumentation engineering workbenc 12 lead ecg Heart accuracy rate Nickel QT Interval Portable equipment signal acquisition Primary Health Care

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Processing of audio signal in all fiber-optic sensor system

Processing of audio signal in all fiber-optic sensor system

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9th International Conference on Optical Communications and Networks (ICOCN 2010)

作者： Xuedian Zhang Xinglian Lu Zhangheng Xu Chen Yao School of Optical-electrical and Computer Engineering University of Shanghai for Science and Technology Shanghai China

ISBN: (纸本)9781617828515

This paper discusses the disposal of audio signal of all fiber optic vibration sensor. Disvantages what electricity and light being combined together in traditional audio transmission cannot be divided has been overcome. The system also diminishes the interference from noise, electromagnetism, and so on. It also processes the advantage that can transfer audio signal in a long distance. Audio signal of this new fiber sensor also has been studied in the paper. Audio signal has been extracted and stored by using labview, and stored by using labview, and the noise reduction filter of audio signal has come true by matlab. At the end of the experiment, the result tells us that signal has been well extracted and stored through the disposal of matlab, audio noise has been decreased a lot.

关键词： elliptic digital filter fiber-optic sensors signal processing speech denoising audio signals Fiber optic sensors laboratory virtual instrumentation engineering workbenc signal processing DISPOSAL MATLAB Audio noise

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A case study: Validating a LabVIEW simulation models presentation of fundamental principles in emerging renewable energy systems

A case study: Validating a LabVIEW simulation models present...

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IEEE International Conference on Emerging Technologies and Innovative Business Practices for the Transformation of Societies (EmergiTech)

作者： Pierre E Hertzog Arthur James Swart Department of Electrical Central University of Technology Bloemfontein South Africa

ISBN: (纸本)9781509007073

LabVIEW has the advantage of being able to customize a graphical user interface to produce visual results at different stages, performing signal acquisition and processing of several stages simultaneously. It has become an integral part of many laboratories as academics seek new ways to help fuse theory and practice. The purpose of this paper is to validate the results obtained from a developed LabVIEW simulation model by comparing its results of a specific case study to those obtained from HOMER. HOMER software was developed by the National Renewable Energy laboratory to assist engineers in the design of micro-power systems and makes extensive use of environmental parameters specific to a given location. The LabVIEW simulation model was developed to demonstrate fundamental principles of an energy generation system, with specific reference to a standalone PV system, where energy flow, efficiency and storage are demonstrated. Correlating the results between the LabVIEW simulation model and HOMER reveals that both simulation packages propose a minimum array size of 10 kW for a specific case study. The LabVIEW simulation module can thus be used with confidence.

关键词： Computational modeling Storms Mars laboratory virtual instrumentation engineering workbenc Computational modeling storms Mars Simulation models Case studies NATIONAL RENEWABLE ENERGY laboratory design engineering signal acquisition Renewable energy ELECTRIC POWER GENERATION SYSTEMS

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Health Monitoring of Human Breathing by Graphene Oxide Based Sensors

Health Monitoring of Human Breathing by Graphene Oxide Based...

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Sensors and Measuring Systems;19th ITG/GMA-Symposium

作者： A. Al-Hamry E. Panzardi M. Mugnaini O. Kanoun Technische Universitat Chemnitz Chair of Measurement and Sensor Technology Information Engineering and Mathematics Universita di Siena

Monitoring of human health is of high importance to enable early detection of illness and improve the quality of life from diseases such as lung cancer or sleep apnea. Breath monitoring is highly interesting in this regard. Graphene oxide is one of the most studied materials for sensing applications and has exceptional properties like large surface area, mechanical stability, and tunable electrical properties. In this paper, we introduce a breath sensor made of a graphene oxide film. Graphene oxide dispersion was deposited on silver interdigitated electrode on flexible substrate, which was then thermally annealed to partially reduce the graphene oxide. The breathing signal was acquired by a digital oscilloscope and the data saved using a LabVIEW interface. The sensors show ultra low response time of less than one second and excellent repeatability. Impedance spectroscopy measurements were carried out at different humidity levels to characterize the sensor. The sensor impedance shows a high decrease by several orders of magnitudes by increasing the relative humidity. Sensitivity to humid air results from the high hydrophilicity of the graphene oxide due to its oxygen functional groups. The change of transport mechanism from Nyquist plot shows the change of the sensor impedance from the capacitive behavior to a semicircle of parallel resistance and capacitance. The high sensitivity of GO to humid air as well as the ultrafast response makes it suitable as a noninvasive and flexible breath-monitoring sensor.

关键词： Component Graphene Oxide (GO) Interdigitated electrodes Impedance spectroscopy Breath sensor and humidity sensor impedance spectroscopy Sensors impedance-spectroscopy graphene oxide parallel resistance digital oscilloscope respiration maladjustment Nyquist diagrams Semicircle laboratory virtual instrumentation engineering workbenc Menopause electrical properties HEALTH MONITORING Breath

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High Sensitivity Accelerometer Operating on the Border of Stability with Digital Sliding Mode Control

High Sensitivity Accelerometer Operating on the Border of St...

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IEEE Sensors

作者： Elie H. Sarraf Ahmed Sharkia Siamak Moori Mrigank Sharma Edmond Cretu Microsystems and Nanotechnology Group (MiNa) Department of Electrical and Computer Engineering The University of British Columbia Vancouver British Columbia Canada

ISBN: (纸本)9781467346412

We propose a novel sliding mode control (SMC), implemented on FPGA, for robust stabilization and high sensitivity operation of a capacitive micro-accelerometer on the pull-in border of stability. SMC feedback enforces a maximum sensitivity position of the proof mass in a normally unstable equilibrium, while the value of the external acceleration is extracted from the "chattering" noise bitstream produced by the controller action. Experimental results show a stabilization of the proof mass at the pull-in position and a measurement of small accelerations. The proposed technique, implemented in LabView and FPGA hardware, represents a promising alternative for the digital control of capacitive MEMS devices, with a lighter implementation footprint than common sigma-delta approaches used for inertial sensors.

关键词： Variable structure systems laboratory virtual instrumentation engineering workbenc MEMS devices inertia sensor accelerometers capacitance Numerical controls acceleration

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Using myDAQ and LabVIEW to Develop a Single-Channel EEG for a Multi-Modality Epileptic Seizure Detection Platform

Using myDAQ and LabVIEW to Develop a Single-Channel EEG for ...

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Annual Northeast Bioengineering Conference

作者： David Wang Lunal Khuon Department of Electrical and Computer Engineering Villanova University Villanova PA 19085

ISBN: (纸本)9781467349284

We present a work in progress of a single-channel electroencephalograph (EEG) system used in a multiple modality platform for epileptic seizure detection. This system consists of an EEG amplifier circuit that provides signal gain and filtering and a myDAQ unit that both simulates and acquires EEG signals which is controlled by a LabVIEW graphical program that performs feature extraction and signal classification. We describe the desired performance for the amplifier circuit and present preliminary measurement results and output examples from the amplifier circuit and LabVIEW program.

关键词： EEG myDAQ LabVIEW laboratory virtual instrumentation engineering workbenc amplifier circuit Electroencephalography epileptic seizure single-channel signal gain signal classification work in progress

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