Roundness Error Measurement of Shaft Parts Based on Virtual Instrument

2012 ◽  
Vol 591-593 ◽  
pp. 2595-2598
Author(s):  
Feng Guo Jiang ◽  
Bin Zhu ◽  
Yan Tao Wang ◽  
Peng Liu
Keyword(s):  
Virtual Instrument ◽  
Modular Design ◽  
Least Square Method ◽  
Least Square ◽  
Measuring System ◽  
Measuring Instruments ◽  
Roundness Error ◽  
Development Platform ◽  
Similar Product ◽  
Data Acquisition Card

Roundness error is widely measured in machinery industry, but existing roundness error measuring instruments have much weakness such as single function and low intelligent level, etc. Aimed at the shortage of traditional roundness error measuring instruments, the roundness error measuring system based on virtual instrument is developed. This system which takes NI LabVIEW8.5 as development platform, evaluates roundness error with the least square method, adopts modular design, combines with 610H IPC, PCI-1716 data acquisition card, stepping motors, LVDT sensor and other hardware can realize fast, precise measurement of roundness error of shaft parts. It is verified to be feasible by measuring standard parts. Compared with the similar product, this system has many advantages such as simple operation, intuitive display, high intelligent level and so on.

Study on the Virtual Instrument for Coaxiality Error

2012 ◽  
Vol 220-223 ◽  
pp. 45-48
Author(s):  
Li Jie Chen ◽  
Ping Zou
Keyword(s):  
High Precision ◽  
Virtual Instrument ◽  
Least Square Method ◽  
Least Square ◽  
Manufacturing Cost ◽  
Zone Method ◽  
Hardware Platform ◽  
Experimental Teaching ◽  
Data Acquisition Card ◽  
Minimum Zone

Used LabWindows/CVI as software platform, existing apparatus in laboratory and a data acquisition card as hardware platform, the virtual instrument for coaxiality error was developed. It combines the theory to measure form and position error with technology about virtual instrument. Coaxiality error by least square method and the minimum zone method is measured. The image of coaxiality error can be displayed on the screen to analyse the causes of error, so as to control the manufacturing error. The virtual instrument has the advantages of high precision, stablity, low manufacturing cost, especially the excellent function expandability. It can be used for experimental teaching and the actual production.

Design of Ground Monitoring System Guidance System Based on Virtual Instrument

2014 ◽  
Vol 644-650 ◽  
pp. 1180-1184
Author(s):  
Bo Zhang
Keyword(s):  
Monitoring System ◽  
Virtual Instrument ◽  
Standard Test ◽  
Guidance System ◽  
Missile Guidance ◽  
Monitoring Methods ◽  
Development Platform ◽  
Data Acquisition Card ◽  
Ground Monitoring ◽  
Guidance Device

For backward status of a missile guidance device monitoring methods, developed a set of ground monitoring system based on virtual instrument technology. The system meets the standard test of a certain type of missile guidance device, the data acquisition card and controller of PXI bus as the hardware platform, using LabVIEW as the software development platform, The acquisition of analog signal, video signal and serial communication set in one, it can detect the performance and parameters of the guidance device, and monitoring the flight trajectory of the missile qualitatively. The application results show that the monitoring system is stable and reliable, improve the efficiency and accuracy of monitoring, and has a certain popularization value.

Design of the Remote Environment Monitoring System Based on Virtual Instrument

2012 ◽  
Vol 155-156 ◽  
pp. 111-114 ◽  
Author(s):  
Rong Chun Sun ◽  
Xue Son
Keyword(s):  
Instrument Development ◽  
Virtual Instrument ◽  
Test Results ◽  
Environment Monitoring ◽  
Development Platform ◽  
High Intelligence ◽  
Data Acquisition Card ◽  
Remote Environment ◽  
Measurement Devices ◽  
Remote Client

Environment monitoring technology is widely applied in industry, agriculture and other fields. Engineers usually need to integrate multiple measurement devices to complete a monitoring tusk, and make these different devices to be connected, which always spend a lot of time. Based on virtual instrument development platform, this paper described how to achieve the temperature and humidity data collection via the data acquisition card, sensors and PC, and realized the real-time display on the remote client through the DataSocket technology. The test results show that the system has the advantages of convenient operation, high intelligence and high accuracy, compared with the traditional instruments.

Subpixel Edge Detection Algorithm of the Glass Bottle Based on Zernike Moments

2011 ◽  
Vol 80-81 ◽  
pp. 1345-1349
Author(s):  
Hao Yang ◽  
Lei Pei
Keyword(s):  
Edge Detection ◽  
Fast Algorithm ◽  
Least Square Method ◽  
Threshold Value ◽  
Detection Algorithm ◽  
Zernike Moments ◽  
Least Square ◽  
Measuring System ◽  
Zernike Moment ◽  
Glass Bottle

The accuracy of edge detection determines the accuracy of actual dimension measurement，in order to improve the measuring accuracy, this paper proposes a fast algorithm of detecting the glass bottle dimension based on Zernike moments. Firstly, combines the traditional Zernike moment-based method with Otsu adaptive threshold algorithm and a new fast algorithm for edge detection is proposed. Then uses this fast algorithm to detect the edge of glass bottle with subpixel-level and uses the least square method to fit ellipses formed by the glass bottle mouth and bottom. Calibrated the system with standard gauge block and obtain the actual dimension at last. Experimental results show that the improved algorithm not only can make the edge detection reach the subpixel-level accuracy, but also can avoid the edge misidentification and inefficient causing by repeatedly manual adjustments to select the threshold value when detecting the edge. Making a rapid, accurate, non-contact measuring system becomes a reality.

Thermocouple Automatic Verificating Device Based on Virtual Instrument Technology

2013 ◽  
Vol 303-306 ◽  
pp. 588-596 ◽  
Author(s):  
Jing Hui Zhao ◽  
Bing Zhou
Keyword(s):  
Virtual Instrument ◽  
Measurement Data ◽  
Temperature Stability ◽  
Test Point ◽  
Potential Measurement ◽  
Development Platform ◽  
Repeatability Error ◽  
Constant Change ◽  
Data Acquisition Card ◽  
Input Module

The thermocouple automatic verification device is constructed of Advantech PCI-1716 bus data transmission automatic calibration multi-function data acquisition card, USB-4718 eight-channel thermocouple input module, JKH-C series SCR phase-shift trigger, PC machine as hardware and the U.S. National Instruments (NI)Labview as software development platform. According to temperature test point determined by thermocouple verification regulation, the device controls the temperature of calibration furnace, acquires the standard and the thermocouple millivolt values automatically and calculates the error at each testing point in line with its measurement data processing formula, realizing the functions such as visual operation interface, test data saving and verification certificate printing. Device accuracy: potential measurement error is no more than 0.005. Resolution: potential is 0.01μV. Temperature control accuracy: error deviating the test temperature is no more than ±5°C when testing it. Temperature stability: the constant change is no more than 0.2°C/min in its testing process. The thermocouple calibration uncertainty is better than 0.7°C and the repeatability error is less than 0.25°C.

An Algorithm and Design for RFID Velocity Measurement Based on Least Square Method

2011 ◽  
Vol 317-319 ◽  
pp. 1573-1576
Author(s):  
Lin Ying Jiang ◽  
Heng Zhang ◽  
Han Qing Tan
Keyword(s):  
Great Degree ◽  
Velocity Measurement ◽  
Least Square Method ◽  
Least Square ◽  
Measuring System ◽  
Rfid Technology ◽  
Velocity Measuring ◽  
The Cost

This paper comes up with an algorithm and application for velocity measurement based on RFID technology. This measurement can reduce the cost of velocity-measuring system to a great degree, and improve the accuracy of velocity measurement on the basis of the algorithm.

Vibration Monitoring System Design

2014 ◽  
Vol 1027 ◽  
pp. 325-330
Author(s):  
Wen Xing Li ◽  
Meng Jia
Keyword(s):  
Fault Diagnosis ◽  
Virtual Instrument ◽  
Computer Software ◽  
Development Trend ◽  
Vibration Monitoring ◽  
Vibration Test ◽  
Test Analysis ◽  
Development Platform ◽  
Data Acquisition Card ◽  
Analysis System

Along with the computer software technology, the virtual instrument is gradually become the development direction of the test area. The realizing vibration test which is analyzed by adopting the virtual instrument has become the development trend of vibration test. It firstly introduces relevant simulation technology theory, the principle of fault diagnosis, the significance and the development present situation. Then according to the research for the development current situation of condition monitoring and fault diagnosis at home and abroad, it puts forward the vibration test analysis system composed the necessary sensors, signal disposal device and data acquisition card. At last it uses labwindows software produced in NI to do the development platform.

A Study on Velocity Decay of φ6mm Tungsten Ball Fragment

2014 ◽  
Vol 1042 ◽  
pp. 154-158
Author(s):  
Chun Lin Yi ◽  
De Ren Kong ◽  
Yi Zhao Li ◽  
Li Ping Li ◽  
Jin Qiu Zhang ◽  
...  
Keyword(s):  
High Speed ◽  
Least Square Method ◽  
Least Square ◽  
Experimental Results ◽  
Measuring System ◽  
Low Speed ◽  
Velocity Decay ◽  
Velocity Attenuation ◽  
Attenuation Models ◽  
Velocity Measuring

In order to explore the velocity attenuation law and model of φ6mm tungsten ball fragment, theory analysis combined with tests is employed to study its velocity experimental results. First of all, a fragment velocity measuring system including 12 groups of cutting device is established. Then the attenuation experiments of φ6mm tungsten ball fragment in high speed and low speed velocity are performed by the measuring system. Based on the least-square method, MATLAB software is adopted to analysis the experimental data and obtained the high speed and low speed velocity attenuation models. The results show that φ6mm tungsten ball fragment speed attenuation coefficient is consistent in high speed and low. Thus, the analysis on velocity experimental results verifies that the established model is reasonable.

Design of Data Acquisition System Based on LabVIEW

2012 ◽  
Vol 569 ◽  
pp. 808-813 ◽  
Author(s):  
Ling Gang Liu ◽  
Jun Hui Li ◽  
Lu Hua Deng
Keyword(s):  
Data Acquisition ◽  
Virtual Instrument ◽  
Development Time ◽  
Single Channel ◽  
Data Acquisition System ◽  
Signal Acquisition ◽  
Graphical Programming ◽  
Development Platform ◽  
Data Acquisition Card ◽  
Machine Interface

Based on LabVIEW, this paper presents a design scheme of data acquisition, which it proposes using computer and ordinary data collection card as the main hardware and LabVIEW as software development platform, thus constructs the virtual instrument system for signal acquisition. The system can realize synchronous data acquisition of single channel or multi-channel signal, as well as real-time display and preservation. The practice shows that this scheme can not only effectively play performance of ordinary data acquisition card, but also reduce greatly program development time and beautify interface through LabVIEW which has powerfully visual human-machine interface editor and graphical programming function.

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