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检索条件"机构=Shanghai Key Laboratory of On-line Testing and Control Technology"

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Investigation on the Direct Current Coefficient of I/V Transducer 16

Investigation on the Direct Current Coefficient of I/V Trans...

引用

16th IEEE International Conference on Electronic Measurement and Instruments, ICEMI 2023

作者： Zhou, Liren Zhu, Li Geng, Ji Shanghai Institute of Measurement and Testing Technolog Shanghai Key Laboratory of On-line Testing and Control Technology Shanghai China

ISBN: (纸本)9798350327144

Direct current coefficient is an essential parameter of I/V transducer, which directly affects the measurement results. Traditional method, comparing the measured transducer with the standard transducer, has limitations;failure to solve the problem in essence. To measure the direct current coefficient accurately, a measuring device was developed, which consists of direct current source, standard direct current ratio, adjustable standard direct current ratio, standard I/V transducer, voltage meter and null indicator. A measurement method was proposed, which fixes the value of direct current source and current flowing through the standard I/V transducer;adjusts the current through the high accuracy ratio conversion. The error measurement principle was employed to minimize the influence on the measurement results. Measure the current coefficient of an I/V transducer and restore its actual working state. The result shows that the current coefficients in the four current ranges are all negative, and are basically in the order of 10-5. The proposed method is characterized by breaking dependence on the superior standard device and meets the needs of precise measurement result correction. © 2023 IEEE.

关键词： Transducers

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Research on Optimization Method of Scanner Measurement based on Cluster Analysis 14

Research on Optimization Method of Scanner Measurement based...

引用

Optical Design and testing XIV 2024

作者： Hu, Xiaolei Ren, Yu Zhang, Feng Xue, Chen Shanghai Institute of Measurement and Testing Technology 1500 Zhang Heng Road Shanghai201203 China Shanghai Key Laboratory of On-line Testing and Control Technology Shanghai201203 China

ISBN: (纸本)9781510682023

In order to improve the accuracy of scanner measurement standard apparatus, a scanner measurement optimization method based on cluster analysis is proposed in the paper. The method firstly constructs a marker point layout with redundant information on the basis of the traditional scanner measurement of standard apparatus, and collects the measurement information of standard apparatus under this layout by a 3D laser scanner, and then optimizes the initial marker point layout by using a weight-based optimization strategy for the measurement results, and then performs the re-fitting of the length parameter of the standard apparatus under the optimized layout, and outputs the final standard apparatus measurement Finally, based on this optimization scheme, an experimental analysis of a 38.1 mm standard ball is carried out and compared with the CMM method with higher accuracy, which verifies that the optimized layout has an important impact on improving the measurement accuracy of the standard ball. The optimization method provides a new calibration scheme for realizing the quantity and value traceability of high-precision large-size 3D laser scanner, which is of good practicality and certain guiding significance. © 2024 SPIE.

关键词： Laser applications

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Research on weight function distribution method under special boundary based on electrical characteristics 6

Research on weight function distribution method under specia...

引用

6th IEEE Information technology, Networking, Electronic and Automation control Conference, ITNEC 2023

作者： Li, Xuejing Yao, Xinhong Shanghai Institute of Measurement and Testing Technology Shanghai201203 China Shanghai Key Laboratory of On-Line Testing and Control Technology Shanghai201203 China

ISBN: (纸本)9781665460033

The correct solution of weight function is very important to the analysis of induced potential distribution. In this paper, the weight function under the special boundary of Laplace equation is simulated and studied. Firstly, the boundary conditions are studied by using the electrical characteristics of the electromagnetic flowmeter sensor. Secondly, the weight functions of different conductivity and thickness measuring tubes are analyzed. Finally, the analysis conclusions are verified from the perspective of experiments. The research conclusion proves the correctness and validity of the research theory based on the special boundary weight function of electrical characteristics. The analysis method in this paper is of great significance in studying the influence of electromagnetic flowmeter wall contamination and electrode contamination on the weight function. © 2023 IEEE.

关键词： Distribution functions

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Analysis of Electromagnetic Flowmeter Weight Function of Elliptical Section Sensor 7

Analysis of Electromagnetic Flowmeter Weight Function of Ell...

引用

7th IEEE Information technology and Mechatronics Engineering Conference, ITOEC 2023

作者： Yao, Xinhong Li, Xuejing Wang, Can Shanghai Institute of Measurement and Testing Technology Shanghai201203 China Shanghai Key Laboratory of On-line Testing and Control Technology Shanghai201203 China

ISBN: (纸本)9798350334197

Electromagnetic flowmeter is a reliable and high linearity speed type liquid flow meter. The accuracy of electromagnetic flowmeter is affected by the distribution of the measured fluid. The cross section of the usual electromagnetic flow sensor is circular, which is to ensure that the flow field distribution in the sensor is symmetrical, but in many actual working conditions, it is necessary to use the electromagnetic flowmeter of the different diameter sensor to control the flow process. In this paper, the weight function of the electromagnetic flowmeter of the elliptical section sensor is analyzed, and the intentional conclusion is given. The weight function of the special-shaped sensor and the uneven distribution characteristics of the weight function are revealed, which provides a reference for optimizing the structure of the electromagnetic flowmeter and improving the measurement accuracy. © 2023 IEEE.

关键词： Flow fields

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Research on electromagnetic flowmeter measurement of non-full pipe flow based on numerical analysis method 6

Research on electromagnetic flowmeter measurement of non-ful...

引用

6th IEEE Information technology, Networking, Electronic and Automation control Conference, ITNEC 2023

作者： Li, Xuejing Zhang, Zhongli Shanghai Institute of Measurement and Testing Technology Shanghai201203 China Shanghai Key Laboratory of On-Line Testing and Control Technology Shanghai201203 China

ISBN: (纸本)9781665460033

The measurement of non-full pipe uniform flow with circular section is the focus of energy saving and emission reduction and government regulation. In order to study the accurate measurement of non-full flow, a three- dimensional mathematical model was established, and the boundary conditions were determined. Based on the velocity distribution characteristics of non-full flow section, an electromagnetic non-full flow measurement device is constructed. Set up the non-full flow calibration device in the laboratory, and carry out the experiment of real flow measurement in the laboratory. In order to ensure the accuracy of non-full tube flow measurement, the flow stabilizing device and non-full tube electromagnetic flowmeter are designed based on the study of the flow field distribution of non-full tube flow. The experimental results show that the error is less than 1.3% and the expanded uncertainty is U = 0.025% (K = 2). The simulation model and parameter selection are also verified by the experimental results. © 2023 IEEE.

关键词： Flow measurement

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Simulation of a New Corrugated Horn Antenna

Simulation of a New Corrugated Horn Antenna

引用

2023 International Applied Computational Electromagnetics Society Symposium, ACES-China 2023

作者： Zhuang, Wu Chaochan, Chen Jiansheng, Zuo Shanghai Institution of Measurement and Testing Technology Shanghai Key Laboratory of On-line Testing and Control Technology Shanghai Institution of 1500 Zhangheng Road Pudong Novel Area China

ISBN: (纸本)9781733509657

In this paper, a new corrugated horn antenna ranges from 40 GHz to 60GHz is simulated based on the static zone performance of the compact field, which satisfies measurement demands of feed antenna. After simulation and optimization, main parameters of the antenna, such as standing-wave coefficient, radiation pattern and radiation gain are highly improved, comparing with the traditional antenna. © 2023 Applied Computational Electromagnetics Society (ACES).

关键词： Horn antennas

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A Novel Corrugated Horn Antenna for Compact Field Measurement 15

A Novel Corrugated Horn Antenna for Compact Field Measuremen...

引用

15th International Conference on Microwave and Millimeter Wave technology, ICMMT 2023

作者： Zuojiansheng Chen, Chaochan Wuzhuang Shanghai Institution of Measurement and Testing Technology Shanghai Key Laboratory of On-Line Testing and Control Technology Shanghai Institution of 1500 Zhangheng Road Pudong Novel Area China

ISBN: (纸本)9798350338874

In this paper, a novel corrugated horn antenna is developed in a wide frequency ranges from 40 GHz to 60GHz ,which is used to evaluate performance of the compact field. After simulation and optimization, a novel manufactured corrugated horn antenna is developed, the main data of which show great consistency with simulated data in parameters of standing-wave coefficient, radiation pattern and radiation gain. In the end, the developed corrugated horn antenna is used to evaluate the performance of compact field, which meet the measurement needs. © 2023 IEEE.

关键词： Horn antennas

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CALIBRATION EQUIPMENT FOR DEFIBRILLATOR ANALYZER DESIGNED WITH DIGITAL MULTIMETER AND OSCILLOSCOPE 10

CALIBRATION EQUIPMENT FOR DEFIBRILLATOR ANALYZER DESIGNED WI...

引用

10th International Symposium on Test Automation and Instrumentation, ISTAI 2024

作者： Wang, Yunling Zhan, Zhiqiang Yu, Lei Shanghai Institute of Measurement and Testing Technology Shanghai China Shanghai Key Laboratory of Online Test and Control Technology Shanghai China

ISBN: (纸本)9781837242672

Defibrillators use electrical pulses to the heart of patients to make hearts beating normally again. There are mainly 3 types of defibrillators, monophasic wave, biphasic wave, and multipulse biowave. Defibrillator analyzers are designed to calibrate defibrillators, and the pulse energy is an important parameter of defibrillator analyzers. In this manuscript, we use the voltage-resistance method for energy calibration. We need to design a high voltage divider, digitizing module, and data processing project. In the digitizing module, we use both the digital multimeter and the oscilloscope to sample. Making DC voltage measurements is one type of digitizing methods of keysight 3458A, which uses memory of the multimeter. The process project is developed by VB language with 10 Libraries Suite of keysight to implement the function of digitizing and energy calculation. We also choose NI PXI oscilloscope for digitizing, and the oscilloscope can be calibrated by NI Calibration Executive Software. The process project is developed by Lab View. The measurement results by 3458A and PXI-5122 are consistent. We evaluate the uncertainty at the end of this manuscript. © The Institution of Engineering & technology 2024.

关键词： Cathode ray oscilloscopes

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Investigation on Sampling Flow Rate Calibration Method of Air Sampler 19

Investigation on Sampling Flow Rate Calibration Method of Ai...

引用

19th International Flow Measurement Conference 2022, FLOMEKO 2022

作者： Song, Jin Chen, Chao Liu, Yiping Li, Haiyang Shanghai Institute of Measurement and Testing Technology Shanghai Key Laboratory of On-line Testing and Control Technology Shanghai201203 China

ISBN: (纸本)9781713871989

In order to obtain the most accurate and effective sampling flow rate calibration method of air sampler, several different equipments were used under two different installation conditions in this paper. According to the experimental results, the calibration results of ultrasonic flowmeter and special orifice flowmeter will be affected by the installation conditions. Consequently, while ultrasonic flowmeter and special orifice flowmeter are used to sampling flow rate calibration, it is necessary to first calibrate the two flowmeters with filter paper, and then use the corrected results to calibrate the sampling flow rate. Based on the results of further experiments, calibration datas of gas roots flowmeter and special orifice flowmeter are consistent with the results obtained from gas flow standard facilities by negative pressure method, at the same time, there is still an error of 3%~5% when corrected ultrasonic flowmeter is used. Therefore, gas flow standard facilities by negative pressure method and gas roots flowmeter can be directly used for sampling flow rate calibration of air sampler, if it is not convenient, special orifice flowmeter which calibrated with filter paper is also a good choice, ultrasonic flowmeter is not recommended. © FLOMEKO *** rights reserved

关键词： Flow rate

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A Numerical Study on the Influence of Temperature on the Measurement Performance of liquid lead-bismuth-eutectic (LBE) Electromagnetic-flowmeter 19

A Numerical Study on the Influence of Temperature on the Mea...

引用

19th International Flow Measurement Conference 2022, FLOMEKO 2022

作者： Li, Xuejing Yao, Xinhong Li, Haiyang Shanghai Institute of Measurement and Testing Technology Shanghai China Shanghai Key Laboratory of On-line Testing and Control Technology Shanghai China

ISBN: (纸本)9781713871989

Liquid lead-bismuth eutectic (LBE) is one of the preferred materials for accelerator driven subcritical(ADS) transmutation targets and coolants in fourth-generation nuclear reactors. Due to the complex and interacting physical and chemical factors in the measurement process of LBE in high temperature operating environment, it is very difficult to control the flow and on-line calibration, resulting in the slow development of LBE flow meter technology, which hinders the fourth Generation nuclear reactor technology development. Electromagnetic flowmeter is currently recognized as one of the most suitable LBE flow measuring instruments in the world. In this paper, the measurement characteristics of LBE electromagnetic flowmeter at high temperature are numerically analyzed and studied, the influence of temperature on magnetic field strength and flow field distribution is quantitatively given, and the measurement linearity of LBE electromagnetic flowmeter is analyzed. The research conclusions provide a certain reference for the detection of lead-bismuth alloy flow parameters and the on-line calibration of LBE electromagnetic flowmeters in the nuclear industry control process. © FLOMEKO *** rights reserved

关键词： Nuclear reactors

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