scholarly journals Determination of PV GeneratorI-V/P-VCharacteristic Curves Using a DC-DC Converter Controlled by a Virtual Instrument

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
E. Durán ◽  
J. M. Andújar ◽  
J. M. Enrique ◽  
J. M. Pérez-Oria
Keyword(s):  
Measurement System ◽  
Virtual Instrument ◽  
High Speed ◽  
Low Cost ◽  
Fast Response ◽  
Prototype System ◽  
System Control ◽  
Systematic Testing ◽  
Testing And Measurement

A versatile measurement system for systematic testing and measurement of the evolution of theI-Vcharacteristic curves of photovoltaic panels or arrays (PV generators) is proposed in this paper. The measurement system uses a circuit solution based on DC-DC converters that involves several advantages relative to traditional methods: simple structure, scalability, fast response, and low cost. The measurement of the desired characteristics of PV generators includes high speed of response and high fidelity. The prototype system built is governed by a microcontroller, and experimental results prove the proposed measurement system useful. A virtual instrument (VI) was developed for full system control from a computer. The developed system enables monitoring the suitable operation of a PV generator in real time, since it allows comparing its actual curves with those provided by the manufacturer.

Design and Application of an In-Line Measurement System for Polarization Parameters

2013 ◽  
Vol 321-324 ◽  
pp. 447-452
Author(s):  
Zhang Bin Wen ◽  
Mi Zhou ◽  
Zhe Chen ◽  
Yun Han Luo
Keyword(s):  
Measurement System ◽  
High Speed ◽  
Low Cost ◽  
Extinction Ratio ◽  
Polarization State ◽  
Light Polarization ◽  
Polarization Measurement ◽  
Degree Of Polarization ◽  
Stokes Vector ◽  
Line System

An in-line all-fiber measurement system for polarization parameters is designed and fabricated in this paper. This system implements accurate control of polarization state, together with in-line, accurate, and high-speed measurement of Stokes vector. It can measure the light polarization parameters such as States of Polarization (SOP), Degree of Polarization (DOP), Light Polarization Extinction Ratio (LPER), and related losses of polarization. Besides, polarization monitoring and stabilizing can be achieved using this system. Because there is no discrete device concluded, the optical path of this system is completely constituted by optical fiber, which makes the entire system low-cost, with small size and low insertion loss. Keywords: All-fiber, polarization control, polarization measurement, in-line system, Stokes vector

Design and Realization of the Dynamic Magnetic Measurement System for Soft Magnetic Material

2011 ◽  
Vol 346 ◽  
pp. 719-723
Author(s):  
Liang Zheng ◽  
Zhi Hua Ying ◽  
Wei Peng Kong ◽  
Feng Sun ◽  
Wei Wei Hu ◽  
...  
Keyword(s):  
Magnetic Material ◽  
Measurement System ◽  
Virtual Instrument ◽  
High Speed ◽  
Magnetic Measurement ◽  
Excitation Power ◽  
Soft Magnetic Material ◽  
Soft Magnetic ◽  
Digital Integration ◽  
High Frequency Ac

A dynamic magnetic measurement system for soft magnetic material based on virtual instrument technology is presented. High frequency AC excitation power supply is adopted to drive soft magnetic material. High speed data transport system composed by FPGA chip ALTERA EP1C12Q240C8N and USB microcontroller Cypress CY7C68013A. The problem of phase-shift of hardware integrator which is difficult to control is solved by digital integration. LabVIEW with powerful data processing capabilities is used to simplifies the hardware structure and improve the testing accuracy and automation level of measurement. The paper also points out problems of digital integration and gives a solution.

scholarly journals Low cost NodeMcu based development water rocket measurement system applied to STEM education

2019 ◽  
Author(s):  
Andi Susilo ◽  
Yasmiati ◽  
Ahmad Apandi
Keyword(s):  
Stem Education ◽  
Measurement System ◽  
Velocity Measurement ◽  
High Speed ◽  
Low Cost ◽  
Smartphone Application ◽  
Water Volume ◽  
Learning Tools ◽  
Rocket Measurement ◽  
School Activity

Water rockets have become one of learning tools for STEM Education in schools. Generally water rockets make in school activity have no parachute load, altitude, and velocity measurement. Rocket can go any direction and also will cause hard collision to the ground that break the high speed rocket. It will take time and need more cost to make a new one for students. This study propose the low cost NodeMcu based water rocket measurement system to solve the problem. Altitude and velocity measurement are added and deployment system to release the parachute to make water rocket fall to the ground smoothly. Smartphone application used to monitor altitude and velocity of water rocket. Variables consist of water volume and air pressure. Five experiments had been conducted and recorded. The result found that the system could calculate Altitude, Velocity, and Deployment System also could release the parachute automatically in Coasting Descent position.

On Using Fast Response Pressure Sensors in Aerodynamic Probes to Measure Total Temperature and Entropy Generation in Turbomachinery Blade Rows

2013 ◽  
Vol 135 (10) ◽  
Author(s):  
Mehmet Mersinligil ◽  
Jean-François Brouckaert ◽  
Nicolas Courtiade ◽  
Xavier Ottavy
Keyword(s):  
Temperature Measurement ◽  
Entropy Generation ◽  
High Speed ◽  
Fast Response ◽  
Absolute Pressure ◽  
Temperature Calibration ◽  
Test Rig ◽  
Total Temperature ◽  
Sensor Probe

This contribution addresses the possibility of exploiting the temperature dependency of piezoresistive sensors as a temperature measurement per se. This requires the characterization of the sensor, or the probe as a temperature probe, i.e., determination of the recovery factor between the sensor temperature and the flow temperature. This temperature calibration as well as the determination of the thermal response time was performed for two probe geometries: a high temperature flush-mounted and a low temperature subsurface mounted single sensor total pressure probe, both with a probe head diameter of 2.5 mm. Two applications are reported. The first application was performed with the flush-mounted sensor probe in the high-speed 312-stage axial compressor CREATE tested in the 2 MW test rig of LMFA at École Centrale de Lyon, in France. The probes were traversed at each inter-row section up to temperatures of 180°C and an absolute pressure of 3 bar. The second application was performed with the subsurface mounted sensor probe in the high-speed single stage R-4 compressor test rig of the von Karman Institute in Belgium. Both applications have shown results in extremely good agreement with simultaneous total temperature measurements with a Kiel-type thermocouple probe. They also underline the necessity of a very accurate temperature calibration. Finally, considering the fact that a simultaneous temperature measurement can be obtained at the same location as the pressure measurement from the sensor, it is possible to derive entropy generation after a blade row, based on the average pressure and temperature quantities. This unveils another extremely interesting aspect of using the fast response probe technique in turbomachinery applications.

Determination of anionic surfactants in real samples using a low-cost and high sensitive solid contact surfactant sensor with MWCNTs as the ion-to-electron transducer

2017 ◽  
Vol 9 (15) ◽  
pp. 2305-2314 ◽  
Author(s):  
Nikola Sakač ◽  
Maja Karnaš ◽  
Marija Jozanović ◽  
Martina Medvidović-Kosanović ◽  
Sanja Martinez ◽  
...  
Keyword(s):  
Anionic Surfactants ◽  
Low Cost ◽  
Fast Response ◽  
Solid Contact ◽  
Real Samples ◽  
Long Life ◽  
Pencil Lead

Long-life, low-cost and fast-response graphite pencil lead surfactant sensors based on MWCNTs.

High Speed Transaction Hardware Channel in Loosely-Coupled Reconfigurable Computing Emulation System

2012 ◽  
Vol 462 ◽  
pp. 456-463
Author(s):  
Bo Wei Zhang ◽  
Guo Chang Gu ◽  
Xing Zhou Zhang ◽  
Dong Liu
Keyword(s):  
Reconfigurable Computing ◽  
High Speed ◽  
Low Cost ◽  
Direct Memory Access ◽  
Maximum Speed ◽  
Prototype System ◽  
Pci Express ◽  
Loosely Coupled ◽  
Computing Model ◽  
Key Features

The loosely-coupled reconfigurable computing model includes the host microprocessor in conjunction with an external stand-alone reconfigurable hardware which takes advantage of low cost in technology and development time. It can work as a fast emulation approach to study reconfigurable computing prototype system. One of the key features of such emulation system is the ability to perform the communication. In this paper, we proposed a high speed hardware channel with direct memory access(DMA) transaction method based on Xilinx ML555 development kit and PCI-express(peripheral component interconnection express) endpoint block IP. Experiments show that both read and write transaction speed in this design meet the theoretical maximum speed.

Research of Reconfigurable Virtual Instrument Technology

2013 ◽  
Vol 711 ◽  
pp. 569-574
Author(s):  
Hong Lai ◽  
Yin Feng Wang ◽  
Zhi Liang Xu
Keyword(s):  
Software Architecture ◽  
Measurement System ◽  
Virtual Instrument ◽  
Data Exchange ◽  
Low Cost ◽  
System Software ◽  
Reusable Components ◽  
Data Process ◽  
Application Requirements ◽  
Event Based

Reconfigurable system is desired in measurement applcation for low-cost products and short time to market. In this paper, we propose a software architecture of dynamical reconfigrualbe virtual instrument, which is built on component based array. In our architecture, the measurement system software is viewed as an integration of a set of reusable components, which are modelled with a set of event-based extern interfaces, internal interfaces for modifing own properties, a data process logic for executing own behavioural specifications and a series of communication ports for data exchange with others. The behaviours of the measurement system software can be viewed as an integration of components and their interactions, which is based on Extend Markup Language (XVIML). XVIML based dynamical interpreter and components based reassembled model are introduced to implement reassemble. The software can be easily reconfigured by changing reusable components and their interactions to adapt to the changing application requirements. Finally, a reconfigurable measurement platform based on above software architecture for testing engineering signal has been developed.

scholarly journals Determination of Contact Potential Difference by the Kelvin Probe (Part II) 2. Measurement System by Involving the Composite Bucking Voltage

2016 ◽  
Vol 53 (6) ◽  
pp. 57-66 ◽  
Author(s):  
O. Vilitis ◽  
M. Rutkis ◽  
J. Busenbergs ◽  
D. Merkulovs
Keyword(s):  
Measurement System ◽  
Low Cost ◽  
Contact Potential Difference ◽  
Indirect Measurement ◽  
Potential Difference ◽  
Variable Component ◽  
Kelvin Probe ◽  
Contact Potential ◽  
Electronic Work Function

Abstract The present research is devoted to creation of a new low-cost miniaturised measurement system for determination of potential difference in real time and with high measurement resolution. Furthermore, using the electrode of the reference probe, Kelvin method leads to both an indirect measurement of electronic work function or contact potential of the sample and measurement of a surface potential for insulator type samples. The bucking voltage in this system is composite and comprises a periodically variable component. The necessary steps for development of signal processing and tracking are described in detail.

scholarly journals Design and Build of an Electrical Machines’ High Speed Measurement System at Low Cost

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Constantinos C. Kontogiannis ◽  
Athanasios N. Safacas
Keyword(s):  
Operating Systems ◽  
Measurement System ◽  
High Speed ◽  
Low Cost ◽  
Difficult Problem ◽  
Electrical Machines ◽  
Reliable Communication ◽  
Single Task ◽  
Speed Measurement ◽  
Driver Support

The principal objective of this paper is to demonstrate the capability of high speed measurement and acquisition equipment design and build in the laboratory at a very low cost. The presented architecture employees highly integrated market components eliminating thus the complexity of the hardware and software stack. The key element of the proposed system is a Hi-Speed USB to Serial/FIFO development module that is provided with full software and driver support for most popular operating systems. This module takes over every single task needed to get the data from the A/D to the user software gluelessly and transparently, solving this way the most difficult problem in data acquisition systems which is the fast and reliable communication with a host computer. Other ideas tested and included in this document offer Hall Effect measuring solutions using some excellent features and very low cost ICs widely available on the market today.

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