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Industrial Measurement
2018 Vol.28 Issue.03
Published 2018-05-26
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Research on the Technology of Centrifugal Dynamic Force Calibration
In this paper, a centrifugal dynamic force calibration technology is proposed. The centrifugal force of the mass block taking circumferential movement is used as reference resource. The force is controllable and directly traceable by measuring motion parameters (speed and time). This technique has the advantages of high precision and flexible signal processing, and can be applied to dynamic calibration of force sensor used in quasi-static environment.
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The optimization and study of the calibration method of the surface thermometer
表温度计主要用于测量、指示物体表面或具备一定温度的环境内某重要部件的表面温度,对产品加工及后期质量有着至关重要的作用。但在JJF1409-2013《表面温度计校准规范》中对表面温度计校准操作要求比较模糊,因此表面温度计的测温准确度始终是个难题。通过本课题的设计研究,对测温原理研究及测温装置设计,较为有效的减小表面温度计校准过程中测温间隙与压力所带来的不确定度,从而提高了表面温度计对温度进行监测的数据准确度,同时通过各项试验,对表面温度计校准规范的校准方法中较为模糊的地方进行量化,规范了表面温度计校准操作程序,提高了工作效率。
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research on functional verification method of three-coordinate measuring sustem
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Prediction modeling method of mine gas emission based on grade variable eigenvalue
Aiming at the problem of high dimensional nonlinear data processing in the prediction of mine gas emission, the optimal fuzzy partition matrix of prediction factors is obtained by fuzzy clustering, fuzzy recognition and optimization theory. combined with the gas emission level, The characteristic value of the level variable of the sample data is calculated, On this basis, a prediction model of gas emission from single input and single output is established by using MATLAB curve fitting toolbox. The empirical analysis shows that the prediction model obtained by this modeling method has higher prediction accuracy, and the prediction effect is better than the existing prediction models.
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Research on verification certificate generation module in automatic verification system
With the constant development of computer technology, programmable instruments are widely used in automatic testing systems. Automatic generation of verification certificate can significantly improve the efficiency of verification and reduce the error caused by manual operation. Firstly, word object model and its structure are introduced .Then, an example based on VB programming to fullfill testing report and record automatically is given in detail. For the purpose of providing references for other programmable software, key techniques and methods of generating certificate automatically are introduced and the program codes were listed.
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Analysis and improvement measures of power grid harmonics influencing the energy measurement for linear multiuser
电网中的谐波对电能的计量影响很大,线性负载用户不但遭受谐波的危害,而且多交电费。本文针对线性用户在谐波环境下的电能计量问题,通过分析谐波对电能表计量的影响,指出在现行电能计量方式下电能计量中存在的不合理之处,并提出了改善线性用户电能计量的措施。
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……….（1） ……….（2） ……….（3） ……….（4）
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Development of a Semi automatic fast verification device for Pressure Gauge
本文研究介绍一种压力表半自动化检定装置,用压缩空气作介质,由减压器操纵快速升降压的检定台和一种数据快速录入软件系统组成,检定效率优于手动和全自动检定系统。本系统分为硬件装置和软件系统两个部分。硬件包括电脑、打印机、空气压缩机、气体减压器、微调阀、连接管路和若干标准接口、计量标准;软件部分是由数据录入、保存系统和证书生成、打印系统组成。
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The auto-loading trestle of the West Pacific Petrochemical Company Ltd. dalian used the PLC control system formerly, but the system halted frequently and the card was invalid. It has been repaired for several times but the problem still existed. The system was not completely automatic controlled, artificial operation more and error prone. It had a strong impact on production and operation. We introduced the Endress+Hauser’s auto-Loading Manager system from 2014. The batch controller is the core of the system, and it is interlocking with electrostatic grounding, spill-proof switch etc. This system realizes the safety velocity automatic controlled. It effectively improves the measurement precision, avoids artificial operation, reduces the trade dispute, to ensure the safety of the production and running smoothly. It is a completely automatic control loading system and has been running smoothly for two years.
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Design of Chassis Dynamometer Self Test System
Abstract: In this paper, a combination of hardware and software, on the basis of the existing chassis dynamometer, through the data acquisition and comprehensive processing, designed a chassis dynamometer self-test system. Realize chassis dynamometer under different loads, under different conditions of the case of the car chassis accurate detection, eliminating unqualified car chassis, thereby reducing the incidence of traffic accidents and improve people's travel safety factor. At the same time, it provides reference value and instructive significance for upgrading and reforming self-checking technology of automobile chassis dynamometer. The system can quickly, accurately and comprehensively test whether the various functions of automobile dynamometer are abnormal, has good economic and social benefits, has certain universal applicability, and is of great promotional value.
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The Developmentof Calibration Device of High Speed Spindle Runout Tester
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Application of EXCEL in the management of the county Legal metrology verification institution
For the existing problems and the situation of the county level metrological verification institutions, this paper put forward a method and the model of effective management by using EXCEL.
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Build supplies to calculate service platform according to the business chain innovation
This text combines current macroscopic economic situation and metallurgy profession to develop present condition and pass original fuel of company to go into factory to calculate to produce the whole supplies of finished product output's to calculate a business chain to carry on analytical research.The appurtenance property calculates an equipments material level, calculate information-based construction and data to deliver process to commence, aiming at business enterprise supplies to calculate business management and supplies to calculate data application and original fuel stock the stocktaking is three core links, according to building an integration to turn data platform thought according to the technique innovation, with technique creative, data excavation for grasp a hand.Combining a business enterprise management is actual, put forward a practical viable way in managing process excellent turning, effective resources integration, creative technique and big data being applied, calculated a ministrant deep time development to put forward a suggestion for the business enterprise supplies。
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Uncertainty analysis of measurement device for wireless temperature verifier
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50.0008 o、50.006 o、50.0003 o
三坐标测量机作为重要的测量设备,在计量行业发挥着重要的作用。一台三坐标不管从购买时技术指标要求,还是购买后入厂验收,所依据和给出的指标数据均为线值。对于使用三坐标测量机测量角度时,其测量结果的不确定度如何给出,是本文论述的重点。
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利用信息通信技术以及互联网平台,提出“互联网+计量器具”民生计量监管模式。文章介绍了民生计量监管信息化平台总体构架和主要功能,最后通过对模拟数据的汇总、分析,实现了民生计量器具的动态管理、数据分级分类统计和相关信息实时共享,为民生计量监管质量的提升提供了有力支撑。
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The research on-line verification of high for pressure gas flowmeter<br>
为确保高压天然气流量计在检定周期性能的稳定可靠，需要定期对在用流量计进行核查测试，使用中检验只能作为一种辅助手段确认流量计的工作状态，但无法确认流量计准确度是否发生变化，在线比对受现场条件限制实时较为困难，本文从比对流量计选型、软件配备、实施方法几个方面结合现场实际，提出一种可适用现场的在线实流比对方法。
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Research on high pressure gas flow measurement technology based on loop device
This paper introduces the basic method of calibrating high pressure gas flowmeter using high pressure gas flow standard device. The general situation of high pressure gas flow standard device at home and abroad is also expounded. In the paper, we also analyzed the advantages of the loop track device over the straight line arrangement. We also talked about the key technologies such as the selection of working medium, the traceability of the device and the controlling method of temperature and pressure during the design and construction of the high pressure loop gas flow standard device. Finally, the uncertainty analysis of typical high pressure loop gas flow standard device is given.
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Analysis of Uncertainty in Measurement of Gas Roots Meters
Abstract: Gas roots meters is a displacement type flowmeter, according to the methods of indication error calculation can be divided into the gas roots meters of class A and class B.Of the Gas Roots Meters of class A,the indication error calculation is based on the meter K coefficient; Of the Gas Roots Meters of class B,the indication error calculation is based on the accumulated flow. Of these two types of Gas Roots Meters, the analysis method of uncertainty is different.
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