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We present Geographic Information System model, which is developed on the basis of metasystem approach and it is focused on application as monitoring system of complex object. The model is described on the basis of set-theoretic approach, functions according to scenarios, integrates, processes and monitors the space-time and coordinate information. The problem of acquisition and reversible compression...
The use of virtual instruments has a very important role in both specialized laboratories and academic ones. Because it is a modern method, it provides increased comfort in monitoring electrical circuits in the long term, as well as reduced costs of implementing and developing laboratories. This paper deals with the efficiency of virtual instruments in monitoring electrical circuits as compared to...
This paper describes a virtual instrumentation architecture to measure and monitor partial discharges (PD) in high voltage equipment. The system has been successfully applied in the diagnosis of several rotating machines in Brazil. The proposed solution for PD measurement using virtual instrumentation involved defining architecture for the measurement system, the specification of suitable hardware...
Voltage dips are the most common voltage disturbance in electrical networks operation. A single phase dip is characterized by several amounts such as amplitude, phase shift, start point on wave and end point on wave. Given that electricity grids are three-phase grids and voltage dips can affect one, two or all three phases, researchers have proposed over time many methods of classifying them, which...
With the development of computer technology, communication technology, and multimedia technology, more and more attention has been paid to remote medical monitoring platform. For the high cost and mobility issues in pregnancy checkups, a kind of remote monitoring platform for uterine contraction pressure based on Virtual Instrument is proposed in this article. Firstly, the article analyzes the importance...
Temperature and humidity monitoring is very important in many fields. In this paper, A temperature and humidity monitoring system is constructed. A set of software by LabVIEW language is compiled. The program is operated in a circular manner and automatically. It can display real-time data curve of nodes and record it. When the data exceeds the limit, the alarm indicating lamp will be bright. Temperature...
This paper designs the rotor monitoring system based on LabVIEW using virtual instrument technology with taking multi-function rotor test-bed as monitoring object. The monitoring system accomplishes the multi-channel data acquisition of the rotor using sensors, which includes motor speed, vibration and noise data. The results show that the monitoring system realizes lots of functions, such as data...
The paper presents a kind of intelligent power management system used in engineering seismograph, which consists of power supply circuit based on power module, and power monitoring circuit based on high speed single chip microcomputers (SCM) C8051F320 and 24-digits high-precision analog-to-digital (A/D) converters LTC2449. The design has features such as wide input range, stable output, self protection,...
Due to safe working requirement of well testing truck, a type of multifunctional virtual real-time general monitoring system is developed on the basis of deeply studying on the measuring principle of well testing truck, which can measure pulLing force, tension gradient, Lifting speed and well depth of the winch cable of well testing truck at the same time, and has the function of real-time condition...
Fuel cell vehicle as a hot topic has been studied for a long time, how to monitor and get reliable performance data will be very helpful for its further improvement. In this paper an online monitor system, where EP100 MCU of Freescale, LabVIEW software of NI Co. and RS232 serial port are applied, is introduced for a fuel cell commuter. This system includes program operation area, mode display area,...
It's necessary to measure each monomer cell voltage of the fuelcell stack in order to ensure fuelcell stack to operate normally. Therefore, a host computer monitoring management software for fuelcell voltage polling measurement based on virtual instrument programming software LabVIEW8.5 was developed. The host computer monitoring management software could show fuelcell's operation voltage to user...
LabVIEW is a graphic programming language and widely used in measurement and control systems, but it don't have the ability of formal verification, this may cause potential hazards of conflict, collision and deadlock in large and complex measurement systems. This paper uses Petri net to model and analyse measurement and control system, then mappes it into LabVIEW. The two graphic languages are easy...
Aiming at the online fault diagnoses of the power cable, an online Power Cable Monitoring system is built by using the virtual instrument platform Lab VIEW. In the system, the monitoring surface is designed by using the graphical programming language, and the data acquisition card PCI6221 is used to capture the data and to monitor the state of the online cable. The experiment shows that the functions...
In this paper, the parameters to be measured non- invasively are fetal movement and uterine contractions with the help of novel MEMS based piezoelectric sensor as these may impose stress on the fetus. The recording was performed on 10 pregnant women in the age group of 26-38 weeks of gestation. The sensor shows the good results.
Base on analysis of influence factor about strip's convexity degree and transverse thickness, established online monitoring system of cold rolling strip's thickness and convexity degree, to emulate by application of LabVIEW software, and compare with the practical situation, as result of it could mainly meet requirement of online virtual monitoring.
The remote monitoring system of mine safety based on C/S and B/S mixed mode was developed by using the virtual instrument technology, network technology and database technology. The system consists of sensors,the underground substation, the ground monitoring center remote clients, through internet explorer, the remote client can browse the real-time monitoring data of mine safety, such as gas, wind...
This paper presents the design of a multi-channel distributed monitoring platform, which is highly suitable to be applied into a traction supply system for urban railway transportation. In our platform are combined the technologies of Ethernet and virtual instrument, fully exerting their merits of large data capacity, high efficiency and low cost. With a HMI (Human Machine Interface) and a VO (Virtual...
The objective of this work is the design and development of the data acquisition and storage parts of a monitoring system that will be used for a certain control and guide equipment. The data captured and stored in a database will be an application that will diagnose failure of control and guide equipment. Data acquisition and data store were developed using finite-state machine model and virtual...
This paper proposes a method of monitoring and analyzing interharmonics in power system based on modified covariance arithmetic and virtual instrument. The system consists of sensors, signal conditioning circuits, transfer boards, data acquisition (DAQ) and compute, which the parameters of interharmonics are identified by using the modified covariance arithmetic of AR model, Some essential issues,...
The pipeline leakage monitor system based on Virtual Instrument are introduced in this paper. As an important means of transportation, pipelines have been used all over the world. Pipeline leakage occurs frequently due to pipeline defect, which not only causes great loss of economy, but also leads to serious pollution to the environment. A real-time monitoring system for pipeline leak is established...
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