Development of the Measurement and Analysis System of Nanoparticles Size Distribution

2010 ◽  
Vol 121-122 ◽  
pp. 168-171 ◽  
Author(s):  
Zhen Mei Li ◽  
Wen Ge Li ◽  
Jin Shen ◽  
Wei Liu
Keyword(s):  
Light Scattering ◽  
Size Distribution ◽  
Virtual Instrument ◽  
High Speed ◽  
Photon Counting ◽  
Peak Position ◽  
Time Data ◽  
The Real ◽  
Measurement And Analysis ◽  
Analysis System

The measurement and analysis system of nanoparticles size distribution was developed by using virtual instrument technology, while the photon counting technology was applied in the system to replace the expensive correlator. High speed photon pulse counter was designed. The real-time data of nanoparticles dynamic light scattering were analyzed in the mixed program of MATLAB and LabVIEW, where the time autocorrelation functions of nanoparticles light scattering signals of monodisperse and polydisperse are reversed by NNLS arithmetic. Experiments results show that the peak position, peak width and symmetry of inverse distribution are very close to the real simulate particles.

The Analysis System of Ultrafine Particles Dynamic Light Scattering Signals Based on B/S Mode

2010 ◽  
Vol 121-122 ◽  
pp. 172-176
Author(s):  
Zhen Mei Li ◽  
Jin Shen ◽  
Wei Liu ◽  
Wen Ge Li
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Power Spectrum ◽  
Real Time ◽  
Virtual Instrument ◽  
Ultrafine Particles ◽  
Scattered Light ◽  
The Real ◽  
Time Frequency ◽  
Analysis System

By integrating network technology, virtual instrument technology, video image network transmission and web page fusion technology, the analysis system of ultrafine particles dynamic light scattering signals based on B/S mode was developed，Through internet explorer, the remote client can browse the real-time monitoring data, such as diameters of particles, the autocorrelation function curve, inversion results, power spectrum density, time-frequency distribution. The photon counting technology was applied in the system to replace the expensive correlator, the real-time data of ultrafine particles dynamic light scattering were analyzed by using Burg arithmetic of AR model, Much useful information of the particle size can be obtained by comparing the power spectrum of standard polystyrene particles scattered light signals of 450nm, 300nm, 200nm.

Effect of Pantograph and Bogie on Interior Noise of High-Speed Train in Tunnel

2013 ◽  
Vol 664 ◽  
pp. 191-196
Author(s):  
You Gang Xiao ◽  
Yu Shi
Keyword(s):  
High Speed ◽  
Sound Pressure ◽  
Broad Band ◽  
Pressure Level ◽  
Channel Noise ◽  
High Speed Train ◽  
Noise Sources ◽  
Vehicle Noise ◽  
Measurement And Analysis ◽  
Analysis System

For clarifying the noise in tunnel affected by pantograph and bogie, which are the most important noise sources, the noises near pantograph and bogie in a high-speed train were tested by multi-channel noise measurement and analysis system in tunnel, and compared with those measured outside the High-speed train and on an open field. The results show that the interior vehicle noise is spatially non-homogeneous in the whole carriage, the larger sound pressure level (SPL) near pantograph are next to ceiling, and near bogie next to floor. The noise spectra show a broad band feature, and dominated by the frequency contents among 100Hz-2kHz, so the countermeasures against noise should be within these range.

A Measurement and Analyze System for the KY231 Material Strain Tester Base on STM8S207 and Virtual Instrument

2013 ◽  
Vol 785-786 ◽  
pp. 1341-1347
Author(s):  
Tie Wang Liang ◽  
Yan Ren
Keyword(s):  
Experimental Data ◽  
Circuit Design ◽  
Measurement System ◽  
Virtual Instrument ◽  
Historical Data ◽  
Usb Interface ◽  
Measurement And Analysis ◽  
Analysis System ◽  
As Stress ◽  
Physical Quantities

A measurement and analysis system is designed base on the requirement of digital upgrade to the KY231 Material strain tester. This system is made up of two parts :The analyze system based on the LABWINDOWS and the measurement system based on STM8S207. The physical quantities (such as stress, pressure, deformation, etc.) of the metal specimen are acquired, displayed and analyzed digitally in this system, meanwhile the experimental data and curves can be stored in the systerm and compared to the historical data saved in the previous files. Because the USB interface is too complex to the MCU systerm form the aspart of the programming and circuit design, the PL2303 is used to simulate USB interface as virtual RS232 for the communication between the measurement system and the analyze system.

The Measurement and Analysis System Development of 3D Roll Forming Machine Dynamic Characteristics Based on Virtual Instrument

2014 ◽  
Vol 889-890 ◽  
pp. 726-731
Author(s):  
Yuan Sheng Hu ◽  
Qiang Li ◽  
Yan Zhi Guan
Keyword(s):  
Dynamic Characteristics ◽  
Virtual Instrument ◽  
System Development ◽  
Three Dimensional ◽  
Field Measurements ◽  
Test System ◽  
Roll Forming ◽  
Development Platform ◽  
Measurement And Analysis ◽  
Analysis System

For the study dynamic characteristics of three-dimensional roll forming machine, this paper develops a dynamic characteristics measurement and analysis system of three-dimensional roll forming machine, which is based on the U.S. NI company software development platform, including the development of hardware and software part .The realization of dimensional roll forming machine dynamics parameters collection and analysis, the experiment proved that the test system can be easily field measurements demand dynamics parameters, to improve the three-dimensional roll forming machine precision and control accuracy to provide an experimental basis.

The Measurement and Analysis of Torsional Vibration for Rotating Machinery

2013 ◽  
Vol 365-366 ◽  
pp. 750-753
Author(s):  
Wei Hao Yao ◽  
Ke Gang Zhao
Keyword(s):  
Torsional Vibration ◽  
Virtual Instrument ◽  
High Speed ◽  
Test System ◽  
Rotating Machinery ◽  
Detection Scheme ◽  
Frequency Detection ◽  
Measurement And Analysis ◽  
High Speed Data ◽  
Instrument Technology

In this paper, the virtual instrument technology is used in torsional vibration study to create a set of torsional vibration natural frequency detection scheme for rotating machinery which is based on the characteristics of controllable one-way overrunning clutch. Also, a test system that is highly sampling frequency, good accuracy and fast data processing capability is developed. This system consists of high-precision dynamic torque sensor, microprocessor-based high-speed data relay module, IPC-based workbench. Finally, the measured results and the calculated results were compared, and it shows that the measured and the calculated results come very close.

Design and Research on the Test and Analysis System for the Proportional Relief Valve Characteristics

2011 ◽  
Vol 317-319 ◽  
pp. 1411-1417
Author(s):  
Chuan Xi Liu ◽  
Xian Ju Meng
Keyword(s):  
Virtual Instrument ◽  
Modular Design ◽  
Automatic Measurement ◽  
Test Method ◽  
Dynamic State ◽  
Time Data ◽  
Relief Valve ◽  
Starting Point ◽  
Stable Performance ◽  
Analysis System

With economic and practical as a starting point, we design and develop the hydraulic platform for proportional relief valve characteristics and automatic test and analysis system that based on virtual instrument and MATLAB software. A new modular design (MD) has been applied to test method for proportional relief valve characteristics, which realized the real-time data acquisition for multi-path pressure signal of automatic measurement & control and hydraulic system for steady state and dynamic state of DBE series proportional relief valve, and conducted analysis such as time domain, frequency domain, visualization and so on to collected data, obtained rather valuable test data and characteristics conclusion. Experiments show that this system has reasonable design and stable performance, enhances the test precision, improves the test method, enriches the analysis means and has good cost performance and research practicability.

Design of Image Processing System Based on FPGA

2011 ◽  
Vol 403-408 ◽  
pp. 1281-1284
Author(s):  
Guo Sheng Xu
Keyword(s):  
Real Time ◽  
Data Storage ◽  
High Speed ◽  
Design Method ◽  
Processing System ◽  
Video Data ◽  
Scanning System ◽  
Time Data ◽  
The Real ◽  
Video Data Compression

To speed up the image acquisition and make full use of effective information, a design method of CCD partial image scanning system is presented. The system achieves to functions of the high -speed data collection, the high -speed video data compression the real time video data Network Transmission and the real time compression picture data storage. the data processed was transferred to PC through USB2.0 real-time to reconstruct defects microscopic images. Experiments show that the system has stable performance, real-time data transmission and high quality images, feasible by adopting the algorithm and scheme proposed in this paper.

Parameter Measurement and Analysis System of Multi-Phase Electric Machine Using Labview-Based Virtual Instrument

2012 ◽  
Vol 503-504 ◽  
pp. 1381-1384
Author(s):  
Yu Qi Rang ◽  
Qiang Wu ◽  
Guang Wei Meng ◽  
Zhan Qing Yang
Keyword(s):  
Virtual Instrument ◽  
High Performance ◽  
Measurement Data ◽  
Automatic Measurement ◽  
Parameter Measurement ◽  
Report Generation ◽  
Measurement And Analysis ◽  
Hardware Configuration ◽  
Analysis System ◽  
Multi Phase

This paper introduces an automatic parameter measurement and analysis system of multi-phase electric machines based on Labview, presents the system hardware configuration, designs the various measuring and analysis modules, discusses the algorithm including automatic measurement, data analysis and report generation and implements the multi-channel and high-performance parallel data acquisition. Compared with the old methods, it has many advantages such as more flexible software application, higher measuring accuracy and simpler hardware configuration.

Design of Signal Acquisition and Analysis System Based on LabVIEW

2011 ◽  
Vol 71-78 ◽  
pp. 4065-4068
Author(s):  
Gui Ji Tang ◽  
Zi Rui Wang ◽  
Jing Jing Sun
Keyword(s):  
Data Acquisition ◽  
Virtual Instrument ◽  
Signal Analysis ◽  
Processing System ◽  
Signal Acquisition ◽  
Functional Requirements ◽  
Time Data ◽  
Dual Channel ◽  
Signal Simulation ◽  
Analysis System

This paper designed a signal acquisition and analysis system based on the characteristics of the graphical programming language of LabVIEW. The system adopted NI USB -9234 data collection card, applied with the virtual instrument and related technology for the signal collecting and processing system. The system also has dual-channel data acquisition, real time data acquisition, signal analysis in time domain and frequency domain, FFT implementation Waterfall conversion, signal simulation capabilities. On the basis of analysis the systems functional requirements, a detailed description of the functional programming and design of the front panel is approached. At last the feasibility of system is experimental inspected and detailed. Experiments have shown that the virtual instrument is a good solution to the efficient implementation of various missions.

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