System for Measurement and Control of Coil-launcher Based on Virtual Instrument

2011 ◽  
Author(s):  
Hongjun Xiang ◽  
Zhiyuan Li ◽  
Xinbao Gao
Keyword(s):  
Virtual Instrument ◽  
And Control ◽  
Measurement And Control

Software System Development of Measurement and Control System for a Nonlinear Absorber by Virtual Instrument

2011 ◽  
Vol 188 ◽  
pp. 236-240
Author(s):  
Cong Ling Zhu ◽  
Wei Zhu Jin ◽  
D.R. Ci ◽  
Zhi Gang Ding ◽  
S.T. Wu
Keyword(s):  
Control System ◽  
Virtual Instrument ◽  
System Development ◽  
System Structure ◽  
Software System ◽  
Measurement And Control System ◽  
Nonlinear Absorber ◽  
New Development ◽  
And Control ◽  
Measurement And Control

Measurement and control system is the key equipment for testing and analyzing of the dynamic characteristics for a nonlinear absorber.It is the necessary means of accomplishing to design the rationalization of the nonlinear absorber. This article has conducted the detailed research in the new development of absorber test equipment to the desing of system structure, The constituent of software system, and The process design, and The development of the computer program based on virtual techniques. Debugging and running this software system have shown that the precision and reliability of it have been proved.

An Implementation of Petri Net Based on Graphical Programming Language

2011 ◽  
Vol 464 ◽  
pp. 327-331 ◽  
Author(s):  
Tian Yan Du ◽  
De An Zhao ◽  
Li Huang
Keyword(s):  
Control System ◽  
Petri Nets ◽  
Programming Language ◽  
Petri Net ◽  
Virtual Instrument ◽  
Measurement And Control System ◽  
Graphical Programming ◽  
And Control ◽  
Measurement And Control ◽  
Graphical Programming Language

This paper deals with an implementation method of component-based Petri nets system based on a graphical programming language (LabVIEW). LabVIEW is not only a graphical programming language, but also a virtual instrument platform which is widely used in virtual measurement and control system. The Places (token number) of Petri nets are represented by Numeric Controls of LabVIEW. The Transitions of Petri nets are represented by subVIs of LabVIEW. Transition subVI will change the tokens of Places by the Numeric Controls' Reference when it is fired. This method will make it ease to implement a Petri net by simply combining Place and Transition components (subVI). The example implementing a special Petri net shows that the Front Panel of the controller reflects the system operating state directly; the Block Diagram is similar to the topology of original Petri net. The combination of two graphic languages makes the modeling, analysis and formal verification of measurement and control system based on Petri nets easier.

Based on the Sensor Network and Virtual Instrument Circuit Board Reliability Test System

2012 ◽  
Vol 522 ◽  
pp. 731-735
Author(s):  
Sheng Yi Chen ◽  
Gui Tang Wang ◽  
Ying Ge Li
Keyword(s):  
Sensor Network ◽  
Virtual Instrument ◽  
Test System ◽  
Auxiliary Function ◽  
Control Circuit ◽  
Circuit Board ◽  
Test Model ◽  
Control Node ◽  
And Control ◽  
Measurement And Control

Aiming at the problem that the quality of fans control circuit board is not stable, this paper designs and develops of multiparameter networked reliability testing system of eclectic fans circuit board based on the virtual instrument Labview. This system adopts distributed structure, which consists of three parts: the measurement and control node, virtual instrument PC, interference sources. The sensing nets measurement and control node with embedded processor, controls test model,process,jamming signals voltage and frequency of circuit interference source, and real-time online collects parameters of control circuit boards key components on operation process ,such as, voltage and temperature, and then through the sensor network sends those dates to Labview virtual instrument machine. The Labview software does display storage, and comprehensive analysis of operation. The application shows that the system can accurately and rapidly acquire circuit board components parameters, operate stably and reliably, and play an important auxiliary function to find the products quality problem and improve the circuit board design.

Temperature Measurement and Control of Fiber Drawing Furnace Based on Virtual Instrument

2012 ◽  
Vol 529 ◽  
pp. 507-511
Author(s):  
Lei Chen ◽  
Zhong Dong Wang
Keyword(s):  
Temperature Measurement ◽  
Virtual Instrument ◽  
Current Source ◽  
Constant Current ◽  
Instrumentation Amplifier ◽  
Fiber Drawing ◽  
Constant Current Source ◽  
And Control ◽  
Measurement And Control ◽  
Conditioning Circuit

The temperature in fiber drawing is one of the key factors influencing fiber’s performance. To the temperature measurement and control problem, the four-wire lead configuration of Pt100 with current excitation was adopted, the signal conditioning circuit includes constant current source, instrumentation amplifier and anti-aliasing filter. The computer collected signals from the conditioning circuit and output control signals by data acquisition card PCI-6221M. The software program was based on LabVIEW, the function relationship between resistance and temperature based on international thermometric scale and the digital filter were applied to calculate temperature. The improved PID control algorithm and the PWM technique were used to realize the temperature control. The experiment results show that the deviation is 0.71°C when the average temperature of the furnace center is 170.25 °C, which satisfies the design requirements.

Combine Harvester Noise and Emissions Detecting System Based on Virtual Instrument

2014 ◽  
Vol 644-650 ◽  
pp. 1019-1022
Author(s):  
Ya Wei Zhang ◽  
Dong Wang ◽  
Shu Mao Wang
Keyword(s):  
Virtual Instrument ◽  
Detection System ◽  
National Standards ◽  
Practical Applications ◽  
Software Interface ◽  
Combine Harvester ◽  
Level Meter ◽  
The Stability ◽  
And Control ◽  
Measurement And Control

To evaluate the noise and emissions of combine harvest meet the national standards or not, a noise and emissions testing and analyzing system was developed based on virtual instrument. A high precision digital noise level meter and an opacimeter were connected to a computer via a RS232 cable, and used to detect the noise and emissions of a working combine harvester respectively. A measurement and control software was developed to collect, process and analysis the measured data automatically in real-time, and the experimental data also could be stored and printed when necessary. The analyzed results were shown on the software interface by curves and LED. To verify the stability and reliability of the system, a serial of tests were made with a Xinjiang-2A combine harvester, the results showed that this detection system meet the need of different kinds of practical applications.

Measurement and Control System for Analysis of the Operation of the Stepper Motor

2017 ◽  
Vol 260 ◽  
pp. 113-126 ◽  
Author(s):  
Roland Pawliczek ◽  
Piotr Soppa
Keyword(s):  
Control System ◽  
Measurement System ◽  
Virtual Instrument ◽  
Stepper Motor ◽  
Measurement And Control System ◽  
Extended Analysis ◽  
Motor Operation ◽  
And Control ◽  
Measurement And Control ◽  
Step Control

The paper describes a control and measurement system for controlling and analysing operation of a stepper motor. The system design is based on the concept of virtual instrument, where data acquisition and transmission use standard solutions, whereas software serves both as a generator and a measurement system – an oscilloscope. The generator allows efficient control of motor operation in the following control modes: wave, full-step and half-step control. There were no winding powering sequence errors observed. The measurement system allows presenting and analysing voltage waveforms in individual windings with possibility to detect couplings and overvoltages. It was also shown that it is possible to detect locking of rotor rotation.The proposed virtual instruments have open structure, which enables extended analysis based on available measurements or expand range of measurements as long as measurement and control system instrumentation allows that.

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