An Automatic Control and Measurement System of Compressor Experimental Operation Platform

2013 ◽  
Vol 333-335 ◽  
pp. 2417-2421
Author(s):  
Zhi Feng Liu ◽  
Yan Lv ◽  
Ji Kai Ma
Keyword(s):  
Automatic Control ◽  
Measurement System ◽  
Virtual Instrument ◽  
Actual Measurement ◽  
Labview Software ◽  
Data Acquisition Card ◽  
Automatic Acquisition ◽  
Set Up ◽  
Operation Platform ◽  
Control And Measurement System

According to actual needs of measurement system, the virtual instrument with functions of automatic acquisition and automatic control was built by NI data acquisition card. Then, automatic control and measurement system with modular features was set up using LabVIEW software. The mode of autonomous configuration is flexible and convenient, which can greatly improve the adaptability of the device in the actual measurement. The experimental efficiency was enhanced, and the experimental data was reliable.

The Design and Implementation of Liquid Surface Tension Coefficient Measurement System Based on Virtual Instrument

2010 ◽  
Vol 108-111 ◽  
pp. 921-925
Author(s):  
Wen Lian Li ◽  
Xiang Dong Ren ◽  
Jing Jing Zhang ◽  
Yang Li
Keyword(s):  
Surface Tension ◽  
Measurement System ◽  
Virtual Instrument ◽  
Liquid Surface ◽  
Surface Tension Coefficient ◽  
Labview Software ◽  
Liquid Surface Tension ◽  
Data Acquisition Card ◽  
Coefficient Measurement ◽  
Sensitive Sensor

With Virtual Instrument technology, the authors designed liquid surface tension coefficient measurement system which has realized the computer measurement of the liquid surface tension coefficient by using of computers and data acquisition card and ELVIS and LabVIEW software and combining with the stress-sensitive sensor. Not only measurement speed is faster and more accurate, processing data is more convenient, operating performance is more stable, but also the measurement’s digitization and computerization is realized, and the system has laid a good foundation for processing the data further.

The Research and Design of Virtual Spindle Vibration Test System

2014 ◽  
Vol 556-562 ◽  
pp. 2903-2905
Author(s):  
Fang Dong ◽  
Jian Cheng Yang ◽  
Tian Zhu Gao ◽  
Yu Xie ◽  
Lei Guo ◽  
...  
Keyword(s):  
Virtual Instrument ◽  
Vibration Signal ◽  
Scientific Basis ◽  
Test System ◽  
Vibration Testing ◽  
Labview Software ◽  
Data Acquisition Card ◽  
Spindle Vibration ◽  
Analysis System ◽  
New Generation

In order to facilitate dynamic analysis of spindle, improve the vibration characteristics of the spindle and achieve the goal of control of spindle motion stability. A spindle vibration testing system is developed with necessary sensor, signal conditioner and data acquisition card based on Labview software in this paper. The spindle vibration testing and analysis system is formed based on virtual instrument graphical programming language Labview. The hardware is reduced in testing process. At the same time, acquisition, processing and analysis for vibration signal are realized, and the costs of hardware are greatly reduced. The testing work is made more convenient and quick by this system, and test is made more intuitive by its real-time display function. It will provide a scientific basis for searching for measures to reduce the spindle vibration and developing a new generation of mechanical structure of the spindle.

scholarly journals Development of Virtual Resistance Meters using LabVIEW

2018 ◽  
Vol 8 (1) ◽  
pp. 133 ◽  
Author(s):  
Suman Lata ◽  
H. K. Verma ◽  
Puja Kumari
Keyword(s):  
Data Acquisition ◽  
Virtual Instrument ◽  
Current Source ◽  
Excitation Source ◽  
Voltage Source ◽  
Dc Voltage ◽  
Labview Software ◽  
Final Measurement ◽  
Data Acquisition Card ◽  
Dc Current

This paper presents the development of three virtual resistance meters using LabVIEW. The unknown resistance is measured in terms of a known resistance of high accuracy by employing (a) a real dc voltage source, (b) a real dc current source, and (c) a virtual dc voltage source. In each case, ratio of two voltage signals is acquired by a single-ADC based multichannel data acquisition card. Therefore error of the ADC gets cancelled, when ratio of two voltages is used in the final calculation of the value of unknown resistance. The first two VRMs use a real excitation source and are thus semi-virtual instruments, whereas the third one is fully-virtual as the excitation source is also implemented in the LabVIEW software along with DAC section of the data acquisition card. The three virtual resistance meters have been successfully implemented. The principle of ratio-metric measurement used makes the accuracy (uncertainty) of final measurement free from the uncertainties of the ADC, the DAC and the excitation source. Standard deviations of the readings taken with the three VRMs have been evaluated and compared. It is concluded that the fully-virtual instrument has the lowest and excellent value of standard deviation.

The Design of Digital Storage Oscilloscope Based on Virtual Instrument

2014 ◽  
Vol 687-691 ◽  
pp. 1109-1112
Author(s):  
Zhang Hui ◽  
Mei Shan Jin ◽  
Yan Nan Zhai ◽  
Ling Gao ◽  
Jun Li
Keyword(s):  
Virtual Instrument ◽  
Software Module ◽  
Storage Oscilloscope ◽  
Labview Software ◽  
Digital Storage ◽  
Digital Storage Oscilloscope ◽  
Data Acquisition Card ◽  
Long Term Preservation ◽  
Multiple Display

We use LabVIEW software and PCI-6024E data acquisition card to design the virtual digital storage oscilloscope. The oscilloscope makes full use of the capabilities of computer storage and connected with the external device.The measurement waveform can storage once, long-term preservation and multiple display,so that we can observe the signal of single change and slow change. Waveform have a variety of ways output. The hardware is open, we can increase the software module by modifying to increase the function of the instrument.

Measuring Method for the Signal Distortion of Axial Thrust and Mechanical Vibration Platform

2013 ◽  
Vol 397-400 ◽  
pp. 1685-1690
Author(s):  
Shang Sheng Wu ◽  
Xiao Meng Lin ◽  
Zhen Wei Lu
Keyword(s):  
Virtual Instrument ◽  
Mechanical Vibration ◽  
Measuring Method ◽  
Signal Distortion ◽  
Charge Amplifier ◽  
Axial Thrust ◽  
Labview Software ◽  
Data Acquisition Card ◽  
Working Principle ◽  
Analysis System

This paper introduced a new mechanical construction for the vibration platform and its working principle. Based on virtual instrument, this paper used sensor, charge amplifier, DAQ(data acquisition card), computer, driver program and LabVIEW software to design signal measuring and analysis system of mechanical vibration platform. This paper used ADAMS simulate vibration platform motion and used LabVIEW calculate distortion degree of acceleration, velocity and position of the vibration platform.

scholarly journals Novel Control Platform Development for PMLSM Drive System Based on Virtual Instrument

2013 ◽  
Vol 416-417 ◽  
pp. 530-535
Author(s):  
Jian Xun Jin ◽  
Wei Xu ◽  
Yan Chen ◽  
You Guang Guo ◽  
Jian Guo Zhu
Keyword(s):  
Data Acquisition ◽  
Virtual Instrument ◽  
Digital Signal Processor ◽  
Pulse Width Modulation ◽  
Digital Signal ◽  
Drive System ◽  
Signal Source ◽  
Computational Capability ◽  
Data Acquisition Card ◽  
Platform Development

A novel control platform for the permanent magnet linear synchronous motor (PMLSM) drive system has been built up based on virtual instrument (VI) and relavant data acquisition card (DAQ) devices. In the traditional control platform, it mostly depends on digital signal processor (DSP), which needs a lot of time to further develop the interface between the personal computer (PC) and operators, and its computational capability is not strong than computer. To overcome these shortages, a novel control platform is presented on the base of one PC, one LabVIEW, and one multifunctional data acquisition card. Firstly, a space vector pulse width modulation (SVPWM) signal source is executed in the VI. Then in order to improve the precision of control system, the field oriented control (FOC) is proposed for the PMLSM. Finally comprehensive experiments verify with relative simulations.

FFT Analysis Using LabView as a Part of Vibration and Preventive Maintenance Class for Senior Level MET students

2005 ◽  
Author(s):  
Aniruddha Mitra ◽  
Sahana Sen
Keyword(s):  
Preventive Maintenance ◽  
Laboratory Experiments ◽  
Vibration Signal ◽  
Engineering Technology ◽  
Technology Program ◽  
Student Activities ◽  
Labview Software ◽  
Vibration Data ◽  
Set Up ◽  
Fft Analysis

An existing senior level elective course on vibration in Mechanical Engineering Technology program at Georgia Southern University has been modified significantly. Two major components have been added to this course. Those are theoretical topics on preventive maintenance and laboratory experiments. As a part of laboratory experiments, Fast Fourier Transform (FFT) was introduced as a possible tool for vibration analysis for the purposes of machine diagnosis. Utilizing the current laboratory set up for the data acquisition systems, LabView software has been used for FFT analysis of signals from various sources. Four different modules were developed and implemented. The modules are as follows: random variation in acceleration of a toy cart due to roughness of the track and pulley, regular uniform wave signal which is generated by the lateral vibration of a cantilever beam at its natural frequency, signal generated by the imported raw data from other sources (e.g. MATLAB) and vibration signal of a shaft mounted on ball bearings in order to detect the defects in the bearing. Each of these modules is illustrated in this paper with suitable examples and suggested student activities and involvements. The results from FFT analysis have been cross checked using other methods and observations. As a follow up, students have been taken to a local industry where significant amount of emphasis is given to preventive maintenance of machineries by vibration data analysis using FFT. Future possible projects include the analysis of vibration data gathered from actual machine shop. This project opens the scope for greater collaborative effort between local industries and classroom activities.

scholarly journals The Influence of Composite Polymeric Materials Topology Over the Shearing Modulus Using Virtual Instruments

2018 ◽  
Vol 55 (4) ◽  
pp. 524-530
Author(s):  
Marinela Marinescu ◽  
Larisa Butu ◽  
Claudia Borda ◽  
Delicia Arsene ◽  
Mihai Butu
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Virtual Instrument ◽  
Mechanical Characteristics ◽  
Polymeric Materials ◽  
Mechanical Impedance ◽  
Impedance Analysis ◽  
Cross Linking ◽  
Labview Software ◽  
Different Temperatures

This study presents research regarding the calculation of the mechanical characteristics of composite polymeric materials. By using LabVIEW� software a virtual instrument was created used for monitoring in real time the process of cross-linking the composite polymeric materials. The experiments were realized based on composite materials containing epoxy/fiberglass resin of different topologies. By means of the virtual instrument and of a sensor created based on the mechanical impedance analysis, implanted in the composite material, it was determined the G shearing module of the composite material at different temperatures.

scholarly journals ANALYSIS AND IMPROVISATION IN EXTRACTING AUDIO SIGNAL AMPLITUDE USING LABVIEW

2020 ◽  
pp. 273-278
Author(s):  
Adarsh V Srinivasan ◽  
Mr. N. Saritakumar
Keyword(s):  
Virtual Instrument ◽  
Sampling Rate ◽  
Audio Signal ◽  
Signal Amplitude ◽  
Audio Signals ◽  
Virtual Instrumentation ◽  
Audio Processing ◽  
Reading And Writing ◽  
Labview Software ◽  
Frequency Sampling

In this paper, either a pre-recorded audio or a newly recorded audio is processed and analysed using the LabVIEW Software by National Instruments. All the data such as bitrate, number of channels, frequency, sampling rate of the Audio are analyzed and improvising the signal by a few operations like Amplification, De-Amplification, Inversion and Interlacing of Audio Signals are done. In LabVIEW, there are a few Sub Virtual Instrument’s available for Reading and Writing Audio in .wav formats and using them and array Sub Virtual Instrument, all the processing are done. KEYWORDS: Virtual Instrumentation (VI), LabVIEW (LV), Audio, Processing, audio array.

The Research on the Motion Control of Industrial Robots Based on LabVIEW

2013 ◽  
Vol 433-435 ◽  
pp. 117-120
Author(s):  
Fei Tao ◽  
Ping An Mu ◽  
Shu Guang Dai
Keyword(s):  
Motion Control ◽  
Virtual Instrument ◽  
Data Exchange ◽  
Communication Protocol ◽  
Industrial Robots ◽  
Labview Software ◽  
Software Program ◽  
Instrument Technology ◽  
Labview Program

This paper puts forward a method to control the industrial robots based on the NI Corporations LabVIEW virtual instrument technology. By designing the communication protocol between the LabVIEW software program on PC and industrial robots, the LabVIEW program can take the control of industrial robots by using RS232 serial ports, including the operation instructions' transmission, the feedback of the robots' running, and the data exchange between the two. The result shows that can effectively realize the motion control of industrial robots based on LabVIEW.

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