Metrology and Measurement Systems最新文献

Calibration of reference torque transducer in one direction and use of its cubic coefficients in both directions with improved interpolation error 在一个方向上校准参考扭矩传感器，并在两个方向上使用其三次系数，从而改善了插补误差

4区工程技术

Metrology and Measurement Systems Pub Date : 2023-11-06 DOI: 10.24425/mms.2022.142272

引用次数: 0

Disassembly-free metrological control of analog-to-digital converter parameters 模数转换器参数的免拆卸计量控制

4区工程技术

Metrology and Measurement Systems Pub Date : 2023-11-06 DOI: 10.24425/mms.2022.143068

{"title":"Disassembly-free metrological control of analog-to-digital converter parameters","authors":"","doi":"10.24425/mms.2022.143068","DOIUrl":"https://doi.org/10.24425/mms.2022.143068","url":null,"abstract":"The authors update the issue disassembly-free control and correction of all components of the error of measuring channels with multi-bit analog-to-digital converters (ADCs). The main disadvantages of existing methods for automatic control of the parameters of multi-bit ADCs, in particular their nonlinearity, are identiﬁed. Methods for minimizing instrumental errors and errors caused by limited internal resistances of closed switches, input and output resistances of active elements are investigated. The structures of devices for determining the multiplicative and nonlinear components of the error of multi-bit ADCs based on resistive dividers built on single-nominal resistors are proposed and analyzed. The authors propose a method for the correction of additive, multiplicative and nonlinear components of the error at each of the speciﬁed points of the conversion range during non-disassembly control of the ADC with both types of inputs. The possibility of non-disassembly control, as well as correction of multiplicative and nonlinear components of the error of multi-bit ADCs in the entire range of conversion during their on-site control is proven. ADC error correction procedures are proposed. These procedures are practically invariant to the non-informative parameters of active structures with resistive dividers composed of single-nominal resistors. In the article the prospects of practical implementation of the method of error correction during non-dismantling control of ADC parameters using the possibilities provided by modern microelectronic components are shown. The ways to minimize errors are proposed and the requirements to the choice of element parameters for the implementation of the proposed technical solutions are given. It is proved that the proposed structure can be used for non-disassembly control of multiplicative and nonlinear components of the error of precision instrumentation ampliﬁers.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":"39 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135635298","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

Using conditional averaging of delayed signals to measure phase shift angle 用延时信号的条件平均法测量相移角

4区工程技术

Metrology and Measurement Systems Pub Date : 2023-11-06 DOI: 10.24425/mms.2022.143064

引用次数: 0

Metrological investigation and calibration of reference standard block for ultrasonic non-destructive testing 超声无损检测标准块的计量研究与标定

4区工程技术

Metrology and Measurement Systems Pub Date : 2023-11-06 DOI: 10.24425/mms.2022.142271

{"title":"Metrological investigation and calibration of reference standard block for ultrasonic non-destructive testing","authors":"","doi":"10.24425/mms.2022.142271","DOIUrl":"https://doi.org/10.24425/mms.2022.142271","url":null,"abstract":"Ultrasonic Non-Destructive Testing (NDT) is a powerful tool used for testing, veriﬁcation, and inspection of material, especially for quality control and assurance. The key applications are the identiﬁcation of ﬂaws, cracks, irregularities, defects, and estimation of material thickness. The standard documents available for ultrasonic NDT are used as a guideline for the speciﬁcations and certiﬁcation of the calibration reference standard block (RSB). The method for metrological characterization of the testing blocks is not speciﬁcally addressed in standard documents and is left to the wisdom of metrologists working in the ultrasonic calibration laboratories to adopt the suitable one. The ultrasonic ﬂaw detector (UFD) is used most widely in ultrasonic NDT. The International Institute of Welding (IIW) V1 RSB standard is used as a reference to ascertain the functionalities of UFDs. In this article, we have proposed a new methodology for calibration of RSB and evaluation of associated measurement uncertainty along with inﬂuencing parameters. The proposed method conforms to the international standard ISO 2400:2012 and Indian standard IS 4904:2006 for validation purposes. According to these standards, the clauses for RSB e.g., dimension and quality of material have been examined. The expanded measurement uncertainty in thickness, ultrasonic longitudinal velocity, ultrasonic attenuation, parallelism and perpendicularity is ± 0 . 068 mm, ± 6 . 70 m/s, ± 0 . 22 dB, and ± 0 . 066 mm, respectively. The measurement uncertainty of these parameters is well within as per clauses stipulated in the standard documents except the ultrasonic longitudinal velocity for the IS standards.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":"40 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135635284","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: 1

Analysis and application of real-time compensation of positioning precision of the turntable with a harmonic function 谐波函数转台定位精度实时补偿的分析与应用

4区工程技术

Metrology and Measurement Systems Pub Date : 2023-11-06 DOI: 10.24425/mms.2022.142269

{"title":"Analysis and application of real-time compensation of positioning precision of the turntable with a harmonic function","authors":"","doi":"10.24425/mms.2022.142269","DOIUrl":"https://doi.org/10.24425/mms.2022.142269","url":null,"abstract":"In order to guarantee the accuracy of turntable angle measurement, a real-time compensation method for turntable positioning precision based on harmonic analysis is proposed in this paper. Firstly, the principle and feasibility of the real-time compensation method are analysed, and a detailed description of harmonic compensation is provided herein. Secondly, we analyse the relationships between the surface number of the polygon with the compensation order of the harmonic function and its corresponding compensation accuracy. The eﬀects of the iterations number and the data width on calculation accuracy in the coordinate rotation digital computer (CORDIC) algorithm are analysed and the quantization models of the approximation error and rounding error of the CORDIC algorithm are established. Then, the calculation of the harmonic error function and real-time compensation processes are implemented on a ﬁeld programmable gate array (FPGA) chip. The resource occupation and time delay of the phase angle calculation and the harmonic component calculation are discussed separately. Finally, the validity of the harmonic compensation method is proven through comparing the compensation eﬀect with that of linear interpolation and the polynomial compensation method. The inﬂuences of the compensation order, the iterations number and the data width on the compensation results are demonstrated by simulation. A test platform with a laboratory-made FPGA circuit is built to evaluate the eﬀect of real-time compensation with the harmonic function and the positioning error compensation can be performed within 760 ns. The results conﬁrmed the eﬀectiveness of the harmonic compensation method, revealing an improvement of the positioning precision from 54 . 21 (cid:48)(cid:48) to 1 . 63 (cid:48)(cid:48) , equivalent to 96.99% reduction in positioning error.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":"40 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135635287","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

Evaluation of a commercial high resistance bridge and methods to improve its precision 商用高阻电桥的评价及提高电桥精度的方法

4区工程技术

Metrology and Measurement Systems Pub Date : 2023-11-06 DOI: 10.24425/mms.2022.142276

引用次数: 2

A novel method of elimination of light polarization cross sensitivity on tilted fiber Bragg grating bending sensor 一种消除倾斜光纤光栅弯曲传感器光偏振交叉灵敏度的新方法

4区工程技术

Metrology and Measurement Systems Pub Date : 2023-11-06 DOI: 10.24425/mms.2022.143066

{"title":"A novel method of elimination of light polarization cross sensitivity on tilted fiber Bragg grating bending sensor","authors":"","doi":"10.24425/mms.2022.143066","DOIUrl":"https://doi.org/10.24425/mms.2022.143066","url":null,"abstract":"ThearticleshowsthepossibilityofusingTFBGgratingstomeasuretheradiusofcurvatureofﬁberbendinginconditionsofvariablepolarizationoftheintroducedlight.Mostofthemodern,stablelightsourcesgenerate lightwithahighdegreeofpolarization.Duetothespatialasymmetry,thedirectionofthelightpolarization planeaﬀectsthespectralparametersofindividualmodes.Forthisreason,inthemeasurementsystemsusing TFBGspresentedsofaritbecomesnecessarytodetermineandcontrolthestateoflightpolarizationdirectly infrontoftheperiodicstructure.Thearticlepresentsthedeterminedspectralparametersofthecladding modeswhichallowbendingmeasurementsregardlessofthedirectionofpolarizationoftheintroduced light.Thankstothis,themeasuringsystemcanbeconstructedwithoutprovidingcontroloftheintroduced lightpolarizationangle,whichmakesitsconstructionsimpler.WhenusingTFBGswithanangleof2 ◦ , the accuracy of determining the bending radius in the range from 15 mm to 30 mm when changing the angle of the plane of polarization in the full range is 0.318 mm in the case of changes in the transmission coeﬃcient. For changes in the wavelength of the selected cladding mode, the accuracy is 0.3203 mm, with the input light polarization being changed in the range from 0 ◦ (P type) to 90 ◦ (S type).","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":"39 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135635296","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: 1

Design and evaluation of a low-cost solar simulator and measurement system for low-power photovoltaic panels 低成本太阳能模拟器及低功耗光伏板测量系统的设计与评估

4区工程技术

Metrology and Measurement Systems Pub Date : 2023-11-06 DOI: 10.24425/mms.2022.143067

引用次数: 1

Machine vision based Vernier caliper reading technology research 基于机器视觉的游标卡尺读取技术研究

4区工程技术

Metrology and Measurement Systems Pub Date : 2023-11-06 DOI: 10.24425/mms.2022.143070

引用次数: 0

Design of semi-automated calibration system for pressure balances 压力秤半自动校准系统的设计

4区工程技术

Metrology and Measurement Systems Pub Date : 2023-11-06 DOI: 10.24425/mms.2022.143073

{"title":"Design of semi-automated calibration system for pressure balances","authors":"","doi":"10.24425/mms.2022.143073","DOIUrl":"https://doi.org/10.24425/mms.2022.143073","url":null,"abstract":"In this study, a digital manometer was used as a transfer standard to perform calibration of a pneumatic pressure balance. The same pressure balance was calibrated with the cross-ﬂoating method based on falling rate determination (FRD). Average of diﬀerences among the eﬀective area results show an agreement of less than 10 ppm between the digital manometer-assisted calibration (DMAC) method and the FRD method. The method in which a digital pressure gauge is used as a transfer standard not only facilitates calibration but also enables the automation of pressure balance calibration. Full automation of pressure balance calibration requires an automatic mass loading system for both the reference instrument and the device under test. Since there is a lot of diﬀerent kinds of pressure balances, it is nearly impossible for a pressure metrology laboratory to have an automatic mass-handler system for every type of pressure balance. Therefore, a more eﬃcient way in which automated mass-handler systems are not required 𝑖.𝑒. , a semi-automatic calibration system, is designed. For that purpose, two diﬀerent calibration procedures, increasing-decreasing cycles, and pressurize-vent (P-V) procedures are performed and compared. The equivalence of procedure results makes the semi-automated calibration design of pressure balances possible. The most distinguishing advantages of a semi-automated calibration system are the applicability to any type of pressure balance and low cost compared to full automation","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":"40 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135635286","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