Papers by Keyword: Measurement

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Authors: Quan Min Liu, Xun Zhang, Zhi Jun Zhang, Xiao Zhen Li
Abstract: On the basis of testing the environmental vibration of the different regions of the elevated station, this paper analyzed the experimental data by the time domain, the vibration acceleration level and spectrum, and some meaningful conclusions are obtained. The vertical Z weighted vibration acceleration level of the office and waiting room achieve 80.7dB, 78.8dB, indicating a serious vibration problem about elevated station, and that some more attention should be paid. Office has an equivalent transverse and longitudinal vibration level; the vertical vibration of the office is slightly larger than the waiting room, but the lateral vibration of the office is obviously lower than the waiting room. The exposure time of the vertical vibration is longer than the horizontal vibration in the same location, and a phase difference exists between them. Lateral vibration of the first floor of the station holds a longer exposure time than the box girder, and has lagged far behind in the box girder. The vertical vibration attenuated slower than the horizontal vibration. The high-frequency vibration is attenuated in the propagation from the box girder to the station floor, while the proportion of low-frequency vibration is improved.
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Authors: Alexey V. Beloborodov, Yuri V. Chuguy, Leonid V. Finogenov, Anna A. Gushchina, Yuri A. Lemeshko, Peter S. Zav’yalov
Abstract: Safety increasing of nuclear reactors is urgent problem for atomic industry. It takes 100% noncontact dimensional inspection of nuclear reactor components. Optoelectronic methods and systems for 3D inspection of fuel assembly elements, including spacer grids and fuel elements, are presented. The universal structured light method for 3D inspection of Russian and western grid spacers using diffraction elements is developed. For fuel elements inspection one considers the shadow method which allows one to implement full inspection of articles under transported along the automatic production line. TDI SIE has developed the commercial version of systems for integral inspection of spacer grids and fuel elements. The experimental results of industrial testing are given.
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Authors: Yoshikazu Arai, T. Asai, Sayeda Ferdous, Wei Gao
Abstract: This paper describes an atomic force microscope (AFM) based instrument for 3D edge profile measurement of single-point diamond cutting tools. The instrument is composed of an AFM unit and an optical sensor for alignment of the AFM probe tip (silicon cantilever) with the diamond cutting tool edge. In the optical sensor, a laser beam from a laser diode along the Y-axis is focused to generate a small beam spot with a micrometer-order diameter at the beam waist, and then received by a photo-detector (photodiode). The tool edge top and the AFM probe tip are brought to the center of the beam waist in the XZ-plane through monitoring the variation of the photodiode output, respectively. Consequently, the AFM tip can be aligned with the tool edge top. Alignment experiments and 3D edge profile measurements of a round-nose type single-point diamond tool are carried out.
138
Authors: Jun Qian, Hua Bing Zhu, Shu Wang Wang, Yi Shan Zeng
Abstract: This paper describes the reconstruction process of a 3P2R type combined robot platform on the basis of a 2-axis linearly moving worktable. An additive 3-DOF manipulator installed above the worktable has one prismatic and two revolute joints by using a novel integrated ball screw and spline axis. The control system of the platform is composed of a 4-axis motion control card and a PLC. Meanwhile, this paper deduces the kinematic equations of this special combined platform for measurement. The 3P2R type platform could be used to measure 3D contour of small work piece automatically.
641
Authors: De Hai Zhang, Ming Yi Wang, Yan Qin Li
Abstract: A challenge method composed of digital image correlation (DIC) method, circle coordinate grid technology and finite element (FE) software to conduct strain measurement of bimetal is presented. This approach can carry out the prediction and measurement of strain. The coordinate grids are painted on top and bottom surface of bimetal when experiment and simulate specimen. Each node is named a fixed number in turn, and these numbers can precisely help to identify the same name point between FE software and the experiments specimen. The bimetal sheet has been tested using DIC software, circle center of the coordinates points can be accurately identify on the surface of bimetal. The changing of distance between adjacent points is computed to construct the forming limit diagram before and after forming. It is an effective means to evaluate the forming performance of bimetal and verify the reasonable of FE analysis results. 2A12 metal is conducted experiment using the challenge method in this paper, bimetal has not conduct experiment due to some reasons.
392
Authors: Matej Daňo, Natália Horňáková, Helena Vidová, Sebastian Saniuk
Abstract: The presented paper is aimed at assessing the level of performance through an industrial company endpoints indicators, in which the efficiency and performance of business processes is transformed to. The paper describes the concept of company performance based on theoretical knowledge of authors from Slovakia as well as developed economies. It also provides concrete examples of financial and non-financial indicators and informs professionals and general public with a number of additional indicators. Likewise the paper characterizes most famous concepts of measurement and management of company performance based on results of a survey which was conducted by the Institute of Industrial Engineering and Management MTF STU in Trnava, as a part of the research project VEGA No. 1/0787 / 12th. Authors attach great importance to measure the process performance as an important part of performance measurement of an industrial company. They introduce the procedures for measuring the manufacturing processes, whole range of specific performance indicators of production processes as well as different methods of measuring the performance of production processes and the company as a whole unit. The level of significance is designed for each proposed indicator and measurement result consists of value reflecting the overall company performance (various departments), which can be used as a benchmark for individual departments or plants within a particular multinational group.
233
Authors: Chang Zheng Li, Yong Lei
Abstract: Engine running plays very important roles in a turbo-shaft engine production and maintenance. Traditional computer aided testing is just work as a data acquisition system to measure parameters and control some devices. In this paper, a CAT system is realized based on VXI and virtual instrument technology, which also communicate with the PLC, the ECU and the dynamometer, to provide a centralized information system for a turbo-shaft engine running. Multi-functions are realized to assistant users before, during and after experiments.
542
Authors: Qi Meng, Zheng Wei Zhang, Yi Ning Wang
Abstract: Present, railway stations are rather common in every cities, towns and villages. In this study, the field study method of soundscape in railway stations has been developed, aiming at finding out the relationships between users’ evaluation of sound environment and other factors in such spaces, as well as their similarities and differences with other urban public spaces. Based on sociological theory, questionnaires and simpling methods have been designed. Using these methods, soundscape surveys and measurement have been carried out in 4 railway stations in capital cities, China, considering both staffs and passengers. By analysing the data, some initial results are given in this paper for further research.
3796
Authors: Yong Gang Yun, Mei Chu, Guang Nan Guo, Hong Yan Shi, Xiao Bo Huang
Abstract: Software quality measurement is closely connected with process and product. With measurement and analysis on software process data, improvement and control on software can be achieved. Effective process performance model plays key role in understanding and controlling. Introduction of GQM model into software measurement process can achieve controllability and testability of software process. GQM uses organization target as measurement index to achieve measurement of software process quantitative. The core idea of CMM/CMMI is to build fact-based management and CMM/CMMI software process management is built on the basis of software measurement. Combining with CMM/CMMI measurement idea, GQM model was expanded to achieve a kind of improved process performance model.
550
Authors: Fa Bin Guo, Ming Zhe Wang, Jing Jing Liao
Abstract: Interoperability is the key target of integrated architecture design, as well as the basis of the capability of integrated systems. Since interoperability plays an important role in fulfilling operational missions, this study proposes a quantification measurement method for the interoperability at architecture level by matching the missions with the initial conditions of executable model—Petri Net. First, the process net of the Petri net model is used to present the interoperation relationship between systems. Then the quality attribute for interoperation is assigned by incident matrix of system interoperation to accomplish the measurement on the interoperability of a heterogeneous set of integrated systems. Finally, the National Missile Defense System is taken as an example to illustrate the application of this method.
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