Software Function Modules Research Articles

Research and Software Design of an Φ-OTDR-Based Optical Fiber Vibration Recognition Algorithm

Distributed optical fiber vibration signal plays a significant role in the communication and safety of any perimeter security monitoring system. It uses light as an information carrier and optical fiber as a means of signal transmission and communication. Phase-sensitive optical time-domain reflectometry (Φ-OTDR) is used to detect the signals generated during events (intrusions or nonintrusion). This paper proposes the time-frequency characteristic (TFC) method for the recognition of the fiber vibration signal and designs and implements the corresponding software function module. The combination of time-domain features and time-frequency-domain features is called TFC; and it is based on the Hilbert transform and on the empirical mode decomposition (EMD) of time-frequency entropy and center-of-gravity frequency that is described. A feature vector is formed, and multiple types of probabilistic neural networks (PNNs) are performed on it to determine whether intrusion events occur. The experimental simulation results show that the monitoring system software can intelligently display the data collected in real time, which demonstrates that the proposed method is effective and reliable in identifying and classifying accurately the types of events. The data processing time is less than 2 s, and the accuracy of the system identification can reach 99%, which ensures the system’s validity.

Displacement Monitoring of the Slope at Tunnel Face Based on PhotoModeler Scanner System

This paper describes a simple slope displacement monitoring system based on PhotoModeler Scanner. Multi-angle images of displacement observation points located in the slope at tunnel face were rapidly acquired by a cheap and calibrated CCD camera. After the image enhancement processing, images were imported into PhotoModeler Scanner system. Then, using several software function modules to process image data, we get the X-Y-Z three component coordinate values of all the displacement monitoring points. Through a long-term monitoring, each component displacement curve of the monitoring points was drawn out. In order to test the reliability of the results, three-dimensional coordinate values of each point were measured by the high-precision total station instrument simultaneously. These three-dimensional coordinate values were treated as true values. Under the requirements of the accuracy of 0.1 mm, the displacement values of photogrammetric measurement were compared to the true values. The results showed that, RMS (Root Mean Square) values of the most points were about ±2.0 mm, in addition to very few. And the total RMS value was ±2.8 mm. It indicates that the digital close-range photogrammetry based on PhotoModeler Scanner Systerm can satisfy the requirement of the general slope displacement monitoring. Moreover, the 3D displacement values got by our way can be used to appraise the security state of slopes in similar areas.

Large Mine Hoist Drum Topology Optimization Design

According to the 2JK type large mine hoist drum manhole, surrounding the shell cracks problems from time to time, based on the conceptual design principle of variable density topology optimization, integrated use of OptiStruct, HyperMesh software functional modules to build a 3D mesh model of the drum. Analyze its finite static element, confirm its weaknesses, then adjust the structure through topology optimization design. Ensure safe operation under normal operating conditions. The optimization design results show that, Static analysis results roughly keep fit with the hoist drum troubleshooting, the maximum stress of surroundings decreased by nearly 38.46% after structural topology optimization, distribution is more uniform, quality dropped by 5.7%, reaching the purpose of lightweight. In this paper, research methods and conclusions provide a viable reference for corporate design departments to solve the problem of drum cracking.

Use of Integrated Library Management Software's (ILMSs) in NBA-accredited Engineering College Libraries (Affiliate to JNTUK, Kakinada)-A Survey

The paper focused on the use of integrated library management software's in the National Board of Accreditation NBA-accredited engineering college libraries (affiliated to Jawaharlal Nehru Technological University, Kakinada JNTUK, Kakinada). Library automation is important and necessary in engineering college libraries as they play a vital role in providing qualitative services to their users. The paper highlighted the library software packages used, stated the status of library automation in NBA-accredited engineering college libraries and focused on the status of library software functional modules, features and services provided by the library software.

Design of Tool Automatic Identification and Database Management System Based on RFID

RFID (Radio Frequency Identification) is a non-contact automatic identification technology, without human intervention. It is convenient to apply and it can identify fast moving objects. Around the tool and the tool information, the problem of low operational efficiency and low degree of tool management information are still unsolved. In this paper, RFID technology is applied in the tool automatic identification and management system. The tool automatic identification and database management system based on RFID is built. The application model, tool information database design and Upper Computer management software of the RFID in tool identification and management are analyzed. The overall architecture and the software function module of the system are constructed. The database management system is developed by the LabVIEW software. The interface design between LabVIEW and Access database is completed by using ActiveX, as a result, the information of Access database can be written-in and read-out by the management system. Meanwhile, the communication protocol between the Upper Computer and Lower Computer is programed that based on VISA. The RS232 is applied to make the communication between the Upper Computer and Lower Computer come true. Finally, take the SECO's Solid Carbide Ball-end Milling Cutter as an example to have an experiment. Through the experiment, the system proved to be with high reliability and efficiency.

The Design of Virtual Experiment Framework Based on ELVIS

The virtual simulation experiment framework consists of hardware and software function modules, which are both designed in this thesis. The application of virtual experiment framework has changed the traditional teaching method to a large extent, reduced the cost of laboratory construction and management, which is of the first importance to realize the remote experiment teaching. Through virtual experiments, students' interest in knowledge is cultivated and innovation ability is enhanced. With the National Instruments Educational Laboratory Virtual Instrumentation Suite (NI ELVIS) and LabVIEW, we could take advantage of graphical programming and a complete suite of standard test instruments on computer and directly interface these instruments to circuits, which is the base of virtual experiment framework.

System Simulation of General Aviation Airborne Conflict Detection and Resolution

In this paper, a general aviation airborne conflict detection and resolution simulation system is designed and implemented. We do some researches and improvements on the conflict detection and resolution algorithm that is suitable for general aviation environment. Based on this, the core system software functional modules based on VxWorks are realized. In the end, simulation and test are carried out to prove the effectiveness of its functionality and performance. Test result shows that the system is stable and meets the simulation requirements.

The Design and Implementation of Virtual Simulation Experiment Platform

The application of virtual simulation experiment platform has changed the traditional teaching method fundamentally, reduce the cost of laboratory construction and management, which has important reference value to realize the remote experiment teaching. Through this experiment, students' interest in knowledge is cultivated and innovation ability is enhanced. The virtual simulation experiment platform consists of hardware and software function modules, which are both designed in this thesis.There are five experiments available for choose as following: virtual oscillograph, spectrum analysis, formula-wave generator, temperature measurement with K-thermocouple, Fourier transform comparison.

Design and Development of Experiment Platform for AC Speed Control System Based on DSP

This paper introduces a novel experiment platform for AC speed control system based on TMS320LF2407A. The system composition and the design method of hardware and software function modules are set forth. In this experimental platform, Users can carry out the experiments of many kinds of motor control strategy for induction motor, synchronous motor and the other motors. This experimental platform is transparent to hardware and is open to software system, and achieved good results in the practical teaching and research.

Design of Integrated Control and Support Platform for Airborne Digital Image Transmission System

Aiming at the problems of guarantee equipment deficiency and poor versatility in airborne digital image transmission system, and adopting ATE design ideas, this paper presents a design scheme of integrated control and support platform based on VME bus architecture. With the technology of software radio and software function modules, the design realizes the universal support of multi-type digital image transmission system. Adopting the technology of virtual system, software designs which are hierarchical, modular and interface, it realizes the integrated control of test system. The practice has proved that this support platform has the advantage of stable operation, good versatility, strong practicality and broad application prospects.

T-Wave Alternans Detection Analysis and Software Design

ECG machine, currently on the market are generally not a function of the T-wave alternans detection analysis. Studies have shown that T-wave alternans can accurately predict sudden cardiac death, higher predictive accuracy in the case of combination of left ventricular ejection fraction (Left Ventricular Ejection Fraction, LVEF). This paper presents the design of function modules of T-wave alternans software based on the QT environment. Focus on the data processing module of the software, such as the QRS wave detection, T wave detection, the matrix of the T-wave extraction, T-wave alternans detection.

Coal Mine Equipment Lease Management Information System Based on Workflow

In accordance with the characteristics of coal-mine equipment lease management, an information system of equipment lease management is put forward based on the business process management (BPM) and B/S pattern. And on the basis of investigation to a lease management enterprise of a mining aggregation, the paper elaborates the design of the software function module and structure, and the realization of technology.

Design of Open-Architecture Gantry Milling NC System Based on Motion Control Card

The open-architecture control system is designed to realize the accurate motion control of gantry milling machine in this article. The hardware construction of control system adopts industry PC + Clipper motion control card architecture to achieve the opening and modularization. The Full coordination method is selected by assigning two motors of the gantry system to the same axis in the same coordinate system. The function modules of control software are demonstrated. It is programmed based on Visual c++ and Pcomm32 pro DLL library. The design of the gantry milling control system can realize the opening of architecture, and more accurate, smooth motion control of 4 axes.

Study on the Key Technology of Intelligent Transformer

The development of smart grid puts higher requirement on the intelligentization of high-voltage equipment including transformers. At present, the intelligentization of transformers is mainly realized through intelligent components. The combination of intelligent components and transformer can realize the measurement, control, calculation, inspection and protection of the transformer. This paper detailedly described the hardware design framework and software function modules of transformer intelligent components, as well as the expert diagnosis system applied to transformer intelligent components. The intelligent components designed by this paper have been successfully applied to 220kV intelligent substation, which is operating stably and reliably. This can promote the development of intelligentized primary power equipment and smart grid as well.

Research and Development of Software System for Differential-Pressure Leak Detector

This paper suggests the system architecture of a differential-pressure leak detector and the design of its software functional modules. It also elaborates on the key technologies for system implementation, such as key input engine design, calculation of differential pressure sensor values and measurement result judgment criteria.

Measurement system for wind turbines noises assessment based on LabVIEW

An automatic measurement platform based on powerful LabVIEW is designed and implemented for noise assessment of Wind Turbine Generator Systems (WTGS). The measurement method of IEC 61400-11 standard is set-up in order to ensure the consistency and accuracy of noises assessment. Firstly, the techniques of measuring wind speed, calculating apparent sound power at integer wind speed, identifying tonality and audibility at integer wind speed recommended in IEC 61400-11, are described briefly. And then, the measurement system is designed using LabVIEW development system with one PCMCIA card and one USB card inserted into a laptop. The whole system architecture with the hardware configures and software function modules, is introduced in detail. Finally, this system is applied to do noises assessing for GOLDWIND 77/1500 wind turbine and the results have been recognized by the authoritative agency of MEASNET. Benefiting from the module design of sub-virtual instrument in LabVIEW, this system has the characteristics of perfect functions, friendly using interface, high integration, low cost and great practicality. It has wide foreground for noises assessment of WTGS.

A safe programmable electronic system

A dual-channel computer architecture for utilisation in programmable logic controllers is presented. Faults can be detected by novel high-speed comparators with fail-safe operation. The cyclic operating mode of PLCs and a specification-level, graphical programming paradigm based on the interconnection of application-oriented standard software function modules are architecturally supported. Thus, by design, there is no semantic gap between the programming and machine execution levels enabling the safety licensing of application software by an extremely simple, but rigorous method, viz., diverse back translation.

Development of a PC-based Open Architecture Software-CNC System

AbstractAs a key technology in the field of advanced manufacturing, an open architecture controller is studied. In order to develop an open architecture software-CNC system on personal computer (PC) according to open modular architecture controllers (OMAC). First, the software and hardware platform is chosen and software realization methodology for the CNC system is determined. Second, static modeling methods of an open architecture controller inclusive of object-oriented (OO) programming technology, dynamic link library (DLL) technology and system modules partition are investigated. Third, the dynamical behavioral modeling and the data flow representation of open architecture controller are discussed, which are both described in hierarchy finite state machine (FSM) model. Fourth, a reusable software module model is established to develop software function module library. Finally, a 3-axis milling machine tool test-bed, named for HIT-CNC, is successfully designed by means of the constructed software function module library and the system configuring method. The experimental results show that, besides increasing the degree of reusability and openness, application of above-mentioned methodology leads to significant decrease of development time as well as maintenance cost.

ASAAC Phase II programme progress on the definition of standards for the core processing architecture of future military aircraft

The Allied Standard Avionics Architecture Council (ASAAC) Phase II programme is sponsored by the Ministry of Defence of the UK, Germany and France through a Memorandum of Understanding (MOU), which provides for a two stage programme over five years to establish a complete set of standards for military core avionics for the end of this century. The standards will cover systems, software, networks, packaging and common functional modules, and will be validated by the construction of a set of demonstrators. The contract was let on 18th November 1997, and project teams were formed in the UK, France and Germany to perform the work. The current contract concerns Stage 1, i.e. the first 15 months of the ASAAC Phase II programme. Stage 1 is required to build on the results of the earlier ASAAC Phase I programme by firstly assessing and refining the architecture concepts and secondly by producing detailed specifications for Stage 2 demonstrations and outline standards for the architecture. The main objectives of this paper are, one year after the beginning of the ASAAC Phase II programme, to present as: • ASAAC Phase II programme objectives; • ASAAC Phase II contractual and industrial organisation; • Architecture concepts definition results of the Stage 1 work; • Demonstrations planned for Stage 2.

A Cognitive Technology Approach to the Verification of Safety Critical Control Software

A large part of real time and computer control applications are safety related. Hence, the software involved must be rigorously verified, i.e., safety licensed, which is extremely critical, since it is far from being as dependable as hardware. This task, however, is very difficult and not satisfactorily solved, yet. In this paper, the intrinsic problems and fundamental principles of safety licensing software are worked out. The importance of the human element in this process is emphasised. Striving for simplicity, the use of two software development paradigms especially suitable for safety critical control systems and trustworthy verification, viz., cause effect tables and function block diagrams, is advocated for. The presented approaches deviate from classical techniques by enforcing the re-use of pre-engineered and a priori verified off-the-shelf application oriented standard software function modules, and by employing diagrammatic and graphical programming paradigms. The methods effectively cope with complexity by simplification, and meet the need of society for safe and dependable computerised automation systems.