MAPAN最新文献 - Book学术

The Influence of Average Effective Emissivity in the Determination of Radiance Temperature of a Surface

IF 1 4区工程技术

MAPAN Pub Date : 2025-02-02 DOI: 10.1007/s12647-025-00806-0

D. Cywiak-Córdova, D. Cárdenas-García, E. Martines-López, H. Rodríguez-Arteaga

{"title":"The Influence of Average Effective Emissivity in the Determination of Radiance Temperature of a Surface","authors":"D. Cywiak-Córdova, D. Cárdenas-García, E. Martines-López, H. Rodríguez-Arteaga","doi":"10.1007/s12647-025-00806-0","DOIUrl":"10.1007/s12647-025-00806-0","url":null,"abstract":"<div><p>The radiance temperature, determined using a radiation thermometer, depends on the spectral emissivity of the measured surface. If the surface is opaque, to determine its temperature from the signal measured by the thermometer, it is common to use the approximation of an average effective emissivity, weighted over the spectral range of operation of the thermometer, and to consider the average effective reflectivity as its complement, such that the sum of their values is one. We found that, when the spectral emissivity of the surface has relevant variations, such consideration can induce noticeable deviations in the calculated radiance temperature, so besides the average effective emissivity, a true effective reflectivity should be calculated as well. By using the real spectral emissivity values of two different surfaces, we performed numerical calculations of the deviations on the estimated radiance temperature, due to the approximation described above, for different common wavelengths and thermometer spectral responses. We found that for a ceramic sample of known spectral emissivity, the above approximation led to deviations in the estimated radiance temperature of 1.4 K at 348.15 K and 2 K at 723.15 K.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"40 1","pages":"243 - 251"},"PeriodicalIF":1.0,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative Study of Microwave Relative Phase Measurement Methods 微波相对相位测量方法比较研究

IF 1 4区工程技术

MAPAN Pub Date : 2025-01-16 DOI: 10.1007/s12647-024-00790-x

Dina A. Abd El-Aziz, Ahmed M. Attiya, Hadia M. Elhennawy, Rasha S. M. Ali

{"title":"Comparative Study of Microwave Relative Phase Measurement Methods","authors":"Dina A. Abd El-Aziz, Ahmed M. Attiya, Hadia M. Elhennawy, Rasha S. M. Ali","doi":"10.1007/s12647-024-00790-x","DOIUrl":"10.1007/s12647-024-00790-x","url":null,"abstract":"<div><p>Recent advancements in novel radio frequency (RF) microwave phase measurement techniques have generated significant interest. Accurate phase measurement is essential for optimal performance in various applications, including telecommunications, radars, phased array antennas, phase modulators, and GPS receivers. High-precision phase measurement methods are crucial for monitoring subtle phase shift variations accurately. This paper analyzes recent research on microwave relative phase measurement techniques based on homodyne and heterodyne detection principles and the associated challenges related to uncertainty, as utilized by national metrology institutes (NMIs). Under the homodyne principle, the National Institute of Standards and Technology (NIST) measured a single phase based on a bridge circuit at 100° with a phase accuracy of 0.5° at a frequency of 4 GHz. This principle is extended by the National Laboratory for Infrared Physics in Japan to measure phase in the range of 0° to 180° in the X-band with a phase accuracy of 2°. Under the heterodyne principle, NIST also implemented phase measurements using a dual-channel phase-shift measurement system from 0° to 360° with an expanded uncertainty of 0.041º at 17 GHz. Several developments in this principle were introduced to address errors and complexity. In addition, a new innovative phase detection methodology based on power measurements was developed by the National Institute of Standards (NIS) in Egypt. This technique offers precise measurements of relative phase shifts in the range from 0° to 180° with a maximum phase variation of ± 3.5°, covering S and C bands. This review aims to contribute to advancing microwave relative phase measurement techniques and provide insights into alternative methods for improvement.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"40 1","pages":"253 - 272"},"PeriodicalIF":1.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Comprehensive Review on Real-Time Viscosity and Density Measuring Sensors

IF 1 4区工程技术

MAPAN Pub Date : 2025-01-11 DOI: 10.1007/s12647-024-00799-2

Karchana Kumari, S. Sathiya, Afzal Sikander

{"title":"A Comprehensive Review on Real-Time Viscosity and Density Measuring Sensors","authors":"Karchana Kumari, S. Sathiya, Afzal Sikander","doi":"10.1007/s12647-024-00799-2","DOIUrl":"10.1007/s12647-024-00799-2","url":null,"abstract":"<div><p>In recent years, the identification of fluid density and viscosity has gained substantial significance across a wide range of industries and scientific fields. These parameters are of utmost importance in comprehending fluid behaviors as accurate measurement of these properties is essential for quality control, process optimization, and product development. A variety of traditional approaches, including capillary, falling ball, volumetry, isochoric, hydrostatic weighing, buoyancy methods, etc., are employed to measure viscosity and density. These traditional approaches require a large amount of samples for measurement and are time consuming. Many modern approaches with different sensing principles have been introduced to overcome the drawbacks of traditional methods. This paper comprehensively describes the densitometers, and viscometers on the basis of different sensing principles such as cantilever, acoustic, tuning fork, diaphragm, pressure, magnetic field, etc. Furthermore, specifications of viscometers and densitometers are briefly summarized, which include the working mechanism, sample range, sample volume, resolution/sensitivity, accuracy/error, testing sample, and temperature. Through this, a mass insight into viscosity and density measurements can be found for wide range of liquids/gas across diverse applications including biopharmaceuticals, protein therapeutics, lubricants, adhesives, healthcare, food production, cosmetics, construction, paints, as well as fuel and petroleum.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"40 1","pages":"287 - 309"},"PeriodicalIF":1.0,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EMC/EMI Compliance for Electromagnetic Field Measurement: An Overview

IF 1 4区工程技术

MAPAN Pub Date : 2025-01-11 DOI: 10.1007/s12647-024-00793-8

Abhinav Mishra, Satya Kesh Dubey

引用次数: 0

Design Study of Double Parallel Beam Cutting Force Sensor 双平行梁切割力传感器的设计研究

IF 1 4区工程技术

MAPAN Pub Date : 2025-01-11 DOI: 10.1007/s12647-024-00792-9

KaiQiang Yan, XiaoBin Huang, WenGe Wu, BaoYu Sun, Ze Chen, Siyu Song

{"title":"Design Study of Double Parallel Beam Cutting Force Sensor","authors":"KaiQiang Yan, XiaoBin Huang, WenGe Wu, BaoYu Sun, Ze Chen, Siyu Song","doi":"10.1007/s12647-024-00792-9","DOIUrl":"10.1007/s12647-024-00792-9","url":null,"abstract":"<div><p>Real-time monitoring of the cutting force during the cutting process is crucial. In the past, cutting force sensors of various structures have been developed, and to improve the integrality and reduce the cross-interference error, a double-parallel-beam cutting force sensor is designed in this study. Through theoretical analysis and finite element method to analyze the influence of each factor on the performance of the sensor, to determine the optimal parameters of the sensor, to fabricate the prototype, and to carry out the patch, group bridge, and package on the double parallel beam. Then the performance test is carried out, and the results show that the sensitivities of the double parallel beam cutting force sensor in the two directions of main cutting force <i>F</i><sub><i>c</i></sub> and feed force <i>F</i><sub><i>f</i></sub> are 4.11 × 10<sup>−3</sup> mV/N and 4.75 × 10<sup>−3</sup> mV/N, respectively, and the minimum cross-interference error is only 0.88%; finally, the cutting test is carried out, and the designed cutting force sensor exhibits a satisfactory ability to accurately measure and record the cutting force under different cutting parameters.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"40 1","pages":"229 - 241"},"PeriodicalIF":1.0,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on Improved Dynamic Time Scale Algorithm for Time-keeping System

IF 1 4区工程技术

MAPAN Pub Date : 2025-01-10 DOI: 10.1007/s12647-024-00794-7

Yu Zhang, Shao-wu Dong, Jie Wang, Shu-hong Zhao, Hai-bo Yuan, Hui-jie Song, Meng Jiang

{"title":"Research on Improved Dynamic Time Scale Algorithm for Time-keeping System","authors":"Yu Zhang, Shao-wu Dong, Jie Wang, Shu-hong Zhao, Hai-bo Yuan, Hui-jie Song, Meng Jiang","doi":"10.1007/s12647-024-00794-7","DOIUrl":"10.1007/s12647-024-00794-7","url":null,"abstract":"<div><p>The study of time scale facilitates stable and reliable operation of time-keeping systems. Algos algorithm is a common method for calculating the time scale. Improving the stability of the time scale is an important issue in the research of time-keeping technology. In this paper, an optimization method of the clock difference data preprocessing in algorithm is proposed. We apply the theory of optimal weight to the calculation of time scale weight for improving the stability of the dynamic time scale. The proposed algorithm is called Improved Dynamic Algos-like (IDAlgos). We use the IDAlgos for joint experiments of cesium clocks ensemble, hydrogen masers ensemble, and hydrogen-cesium clocks ensemble, respectively. The results compared with Conventional Dynamic Algos-like (CDAlgos) show that i) for the case of cesium clocks ensemble, the short-term stability has been improved, the stability increased by 22.5% in 2 h and 20.8% in 4 h. ii) for the case of hydrogen masers ensemble, the stability increased by 18.3% in 1 h and 31.3% in 128 h, that is, both long-term and short-term stability has been improved. iii) for the clock ensemble combined of hydrogen masers and cesium clocks, the long-term and short-term stability has been greatly improved,among them, the stability increased by 64.6% in 1 h and 69.3% in 128 h. Consequently, the IDAlgos has obvious improving on the stability of the time scale</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"40 1","pages":"217 - 227"},"PeriodicalIF":1.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Performance Evaluation of an Open Loop Wind Tunnel at NIS

IF 1 4区工程技术

MAPAN Pub Date : 2025-01-09 DOI: 10.1007/s12647-024-00791-w

Fatma A-M. Kassem, Ahmed Farouk AbdelGawad, Mefreh M. Nassief, A. E. Abu El-Ezz, Mohamed Adel

{"title":"Design and Performance Evaluation of an Open Loop Wind Tunnel at NIS","authors":"Fatma A-M. Kassem, Ahmed Farouk AbdelGawad, Mefreh M. Nassief, A. E. Abu El-Ezz, Mohamed Adel","doi":"10.1007/s12647-024-00791-w","DOIUrl":"10.1007/s12647-024-00791-w","url":null,"abstract":"<div><p>This study presents the design and evaluation of wind tunnel performance at the National Institute of Standards in Egypt. Flow contraction in the convergent nozzle of a subsonic wind tunnel is one of the most effective means of reducing the level of turbulence intensity in the testing section. Accordingly, this study is based on designing a contraction ratio of 7, and comparing this ratio with previous studies in terms of turbulence intensity. The construction steps for the major components of the wind tunnel and calibration procedure are described. The calibration results show that the present wind tunnel provides a good repeatability of ± 0.003 m/s. In addition, reproducibility conditions provide a high confidence level in the results obtained from long-term investigations, with satisfactory performance. The results of the experimental study on the influence of flow contraction on the mean turbulence intensity in the convergence nozzle of an open-loop subsonic wind tunnel were less than 0.5%. In addition, the accuracy and stability of the wind tunnel design were verified using statistical evaluation of the normalized error value (En-value). The results indicate that the maximum normalized error of the measurement at the end of the test section was 0.8.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"40 1","pages":"203 - 215"},"PeriodicalIF":1.0,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

State of Electrical Metrology and Possible Advancements Utilizing Extended Reality

IF 1 4区工程技术

MAPAN Pub Date : 2025-01-08 DOI: 10.1007/s12647-024-00795-6

Hala M. Abdel Mageed, Israa Azzam, Farid Breidi

{"title":"State of Electrical Metrology and Possible Advancements Utilizing Extended Reality","authors":"Hala M. Abdel Mageed, Israa Azzam, Farid Breidi","doi":"10.1007/s12647-024-00795-6","DOIUrl":"10.1007/s12647-024-00795-6","url":null,"abstract":"<div><p>Electrical metrology is a discipline that aims to guarantee the accuracy, precision, and dependability of electrical systems and apparatuses. Any departure from the necessary measuring standards can significantly impact the operation of electrical systems and devices. Thus, it is crucial to develop cutting-edge calibration techniques to increase the precision and effectiveness of electrical measurements, i.e., the dependability of electrical measurements, while saving time and resources. One of the calibration techniques utilizes visual guidance while calibrating, which is helpful for junior metrologists who lack expertise and training. This technique incorporates virtual standards in electrical metrology, which can increase accuracy and efficiency and provide visual guidance. This paper proposes the adoption of extended reality as an immersive measurement tool to overcome obstacles and improve the accuracy and efficiency of metrology. Electrical instruments can be precisely calibrated in a virtual environment by replacing real standards with virtual standards. This could be achieved through the adoption of extended reality technologies like virtual reality, augmented reality, and mixed reality, all of which give metrologists an immersive and engaging experience, allowing them to test and improve their performance via immersive metrology. Such immersive metrology can aid in the improvement of metrologists’ training by enabling them to obtain practical experience in a virtual setting that is risk-free and secure before experiencing measurement methods in realistic experimental settings.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"40 1","pages":"151 - 163"},"PeriodicalIF":1.0,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

International Bilateral Inter-laboratory Comparison Measurements Between Public Institutions for Dry-Block Calibrator and Thermometer Calibrations

IF 1 4区工程技术

MAPAN Pub Date : 2025-01-08 DOI: 10.1007/s12647-024-00800-y

Can Ekici, Öznur Avci

引用次数: 0

Stimulus Towards ESG in India and GHG Protocol with Measurable Metrological Tools: Progresses and Challenges

IF 1 4区工程技术

MAPAN Pub Date : 2025-01-08 DOI: 10.1007/s12647-024-00798-3

Shubhangi Chourasia, S. M. Pandey

{"title":"Stimulus Towards ESG in India and GHG Protocol with Measurable Metrological Tools: Progresses and Challenges","authors":"Shubhangi Chourasia, S. M. Pandey","doi":"10.1007/s12647-024-00798-3","DOIUrl":"10.1007/s12647-024-00798-3","url":null,"abstract":"<div><p>The up-surging of environmental, economic, and social-related matters has changed the view of corporate stakeholders' responsiveness towards profit. They have started thinking about the planet, people, and their wealth besides profit. Consequently, high hope is also focused on Environmental, Social And Governance (ESG) factors. The commitment towards the environment and social responsibility of the organization imitates the ESG performance of enterprises that are corporating ESG activities in their working style with a vigorous governance structure; furthermore, the Covid pandemic has exaggerated the importance of ESG parameters. Corporate stakeholders are fervent in knowing how ESG practices can be embraced into business policy, bringing more clarity and transparency to ESG reporting disclosures. The present study offers insight into the ESG concerns unfolding in terms of their prominence and the existing situation in India. In this study, we briefly discuss the need for ESG in Indian organizations and its transformation landscape for the future. Then, we discuss ESG adoption preparedness and its challenges in India. Then, we discussed the steps to be taken to achieve the aim of the sustainability strategy and its implementation, including the ESG Strategy, its linkage of ESG with GHG protocol with measurable metrology tools & the role of metrology in measuring Scope-1, Scope-2, and Scope-3 its emissions measurement with metrology measuring instruments. In the next section, we discuss the need for sustainable ESG reporting, its associated trends and challenges, and India's current status in ESG funds, ESG investing, and its current challenges.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"40 1","pages":"175 - 201"},"PeriodicalIF":1.0,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0