Metrology and Measurement Systems最新文献_第8页

A feedback weighted fusion algorithm with dynamic sensor bias correction for gyroscope array 陀螺仪阵列动态传感器偏置校正反馈加权融合算法

IF 1 4区工程技术

Metrology and Measurement Systems Pub Date : 2023-07-20 DOI: 10.24425/mms.2021.136000

Ding Yuan, Yongyuan Qin, Xiaowei Shen, Zongwei Wu

{"title":"A feedback weighted fusion algorithm with dynamic sensor bias correction for gyroscope array","authors":"Ding Yuan, Yongyuan Qin, Xiaowei Shen, Zongwei Wu","doi":"10.24425/mms.2021.136000","DOIUrl":"https://doi.org/10.24425/mms.2021.136000","url":null,"abstract":"Low-cost Micro-Electromechanical System (MEMS) gyroscopes are known to have a smaller size, lower weight,andlesspowerconsumptionthantheirmoretechnologicallyadvancedcounterparts.However,current low-gradeMEMSgyroscopeshavepoorperformanceandcannotcompetewithqualitysensorsinhigh accuracynavigationalandguidanceapplications.Themainfocusofthispaperistoinvestigateperformance improvementsbyfusingmultiplehomogeneousMEMSgyroscopes.Thesegyrosaretransformedinto avirtualgyrousingafeedbackweightedfusionalgorithmwithdynamicsensorbiascorrection.The gyroscopearraycombineseighthomogeneousgyroscopeunitsoneachaxisanddividesthemintotwo layersofdiﬀerentialconﬁguration.Thealgorithmusesthegyroscopearrayestimationvaluetoremovethe gyroscopebiasandthencorrectthegyroscopearraymeasurementvalue.Thenthegyroscopevarianceis recalculatedinrealtimeaccordingtotherevisedmeasurementvalueandtheweightedcoeﬃcientsand stateestimationofeachgyroscopearededucedaccordingtotheleastsquareprinciple.Thesimulations andexperimentsshowedthattheproposedalgorithmcouldfurtherreducethedriftandimprovetheoverall accuracybeyondtheperformancelimitationsofindividualgyroscopes.Themaximumcumulativeangle errorwas − 2 . 09 degrees after 2000 seconds in the static test, and the standard deviation (STD) of the output fusion value of the proposed algorithm was 0.006 degrees/s in the dynamic test, which was only 1.7% of the STD value of an individual gyroscope.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48858429","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

Exhaled breath analysis by resistive gas sensors 用电阻式气体传感器分析呼出气体

IF 1 4区工程技术

Metrology and Measurement Systems Pub Date : 2023-07-20 DOI: 10.24425/MMS.2020.131718

T. Chludzinski, A. Kwiatkowski

{"title":"Exhaled breath analysis by resistive gas sensors","authors":"T. Chludzinski, A. Kwiatkowski","doi":"10.24425/MMS.2020.131718","DOIUrl":"https://doi.org/10.24425/MMS.2020.131718","url":null,"abstract":"Breath analysis has attracted human beings for centuries. It was one of the simplest methods to detect various diseases by using human smell sense only. Advances in technology enable to use more reliable and standardized methods, based on different gas sensing systems. Breath analysis requires the detection of volatile organic compounds (VOCs) of the concentrations below individual ppm (parts per million). Therefore, advanced detection methods have been proposed. Some of these methods use expensive and bulky equipment (e.g. optical sensors, mass spectrometry – MS), and require time-consuming analysis. Less accurate, but much cheaper, are resistive gas sensors. These sensors use porous materials and adsorptiondesorption processes, determining their physical parameters. We consider the problems of applying resistive gas sensors to breath analysis. Recent advances were underlined, showing that these economical gas sensors can be efficiently employed to analyse breath samples. General problems of applying resistive gas sensors are considered and illustrated with examples, predominantly related to commercial sensors and their long-term performance. A setup for collection of breath samples is considered and presented to point out the crucial parts and problematic issues.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44239617","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: 6

Comparisons of envelope morphological filtering methods and various regular algorithms for surface texture analysis 表面纹理分析中包络形态滤波方法与各种正则算法的比较

IF 1 4区工程技术

Metrology and Measurement Systems Pub Date : 2023-07-20 DOI: 10.24425/MMS.2020.132772

P. Podulka

引用次数: 18

PIFA antenna for partial discharge detection in power transformers 电力变压器局部放电检测用PIFA天线

IF 1 4区工程技术

Metrology and Measurement Systems Pub Date : 2023-07-20 DOI: 10.24425/MMS.2021.136611

Cyprian Szymczak

{"title":"PIFA antenna for partial discharge detection in power transformers","authors":"Cyprian Szymczak","doi":"10.24425/MMS.2021.136611","DOIUrl":"https://doi.org/10.24425/MMS.2021.136611","url":null,"abstract":"The article presents the process of designing and manufacturing a prototype antenna based on the PIFA (Planar Inverted F Antenna) technology for the detection of UHF signals from partial discharges occurring in the power transformer insulation system. The main objective of the simulation studies was to obtain a frequency band covering the range of radio frequencies emitted by partial discharges in oil-paper insulation (surface discharges) and to adjust the dimensions of the antenna for its installation in the inspection window of the power transformer. The proposed structure consists of a radiating element in the shape of a rectangular meandering line and an additional parasitic element in the form of a specially selected resistor connecting the reﬂector with the radiator. The design of the prototype antenna was tested during laboratory tests in a high-voltage laboratory using a model of a transformer tank in which partial discharges were generated. The results of the measurements showed that the developed antenna has a higher sensitivity of partial discharge detection than other popular antennas used in transformer diagnostics, i.e. the disk antenna and the Hilbert fractal antenna. Due to high sensitivity, compact and simple structure and low production costs, the proposed PIFA antenna may be an interesting alternative to the currently used commercial antennas (mainly disk antennas) in on-line monitoring systems for partial discharges of power transformers.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42367974","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

Metrological equipment for verification and calibration of non-automatic weighing instruments – axle and crane weighting instrument 非自动称重仪表检定和校准用计量设备——车轴和起重机称重仪表

IF 1 4区工程技术

Metrology and Measurement Systems Pub Date : 2023-07-20 DOI: 10.24425/mms.2021.136615

T. Gajdošík, Ľ. Kučera, I. Gajdac, A. Frič, Jaromír Markovič

引用次数: 0

A two-step fall detection algorithm combining threshold-based method and convolutional neural network 一种结合阈值法和卷积神经网络的两步跌倒检测算法

IF 1 4区工程技术

Metrology and Measurement Systems Pub Date : 2023-07-20 DOI: 10.24425/mms.2021.135999

Tao Xu, Jiahui Liu

{"title":"A two-step fall detection algorithm combining threshold-based method and convolutional neural network","authors":"Tao Xu, Jiahui Liu","doi":"10.24425/mms.2021.135999","DOIUrl":"https://doi.org/10.24425/mms.2021.135999","url":null,"abstract":"Falls are one of the leading causes of disability and premature death among the elderly. Technical solutions designed to automatically detect a fall event may mitigate fall-related health consequences by immediate medical assistance. This paper presents a wearable device called TTXFD based on MPU6050 which can collect triaxial acceleration signals. We have also designed a two-step fall detection algorithm that fuses threshold-based method (TBM) and machine learning (ML). The TTXFD exploits the TBM stage with low computational complexity to pick out and transmit suspected fall data (triaxial acceleration data). The ML stage of the two-step algorithm is implemented on a server which encodes the data into an image and exploits a fall detection algorithm based on convolutional neural network to identify a fall on the basis of the image. The experimental results show that the proposed algorithm achieves high sensitivity (97.83%), speciﬁcity (96.64%) and accuracy (97.02%) on the open dataset. In conclusion, this paper proposes a reliable solution for fall detection, which combines the advantages of threshold-based method and machine learning technology to reduce power consumption and improve classiﬁcation ability.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43028896","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: 4

AN IMPROVED METHOD OF BUSBAR VOLTAGE RECONSTRUCTION FROM SIGNALS OF ELECTRIC FIELD SENSORS INSTALLED IN AN INDOOR MV SUBSTATION 一种改进的由室内MV变电站电场传感器信号重构母线电压的方法

IF 1 4区工程技术

Metrology and Measurement Systems Pub Date : 2023-07-20 DOI: 10.24425/118155

D. Borkowski

引用次数: 1

METROLOGICAL ASPECTS OF EVALUATION OF GLASS TYPES USED IN PHOTOVOLTAIC MODULES IN LABORATORY SCALE 实验室规模光伏组件用玻璃类型评定的计量方面

IF 1 4区工程技术

Metrology and Measurement Systems Pub Date : 2023-07-20 DOI: 10.24425/118161

Z. Starowicz, K. Drabczyk, K. Gawlińska, P. Zięba

引用次数: 1

Error analysis of the three-phase electrical energy calculation method in the case of voltage-loss failure 失压情况下三相电能计算方法的误差分析

IF 1 4区工程技术

Metrology and Measurement Systems Pub Date : 2023-07-20 DOI: 10.24425/mms.2019.129575

Han-miao Cheng, Zhongqiu Wang, Qinqin Cai, XiaoPeng Lu, Yunbo Gao, Ruihua Song, Zhengqi Tian, Xiao-xing Mu

{"title":"Error analysis of the three-phase electrical energy calculation method in the case of voltage-loss failure","authors":"Han-miao Cheng, Zhongqiu Wang, Qinqin Cai, XiaoPeng Lu, Yunbo Gao, Ruihua Song, Zhengqi Tian, Xiao-xing Mu","doi":"10.24425/mms.2019.129575","DOIUrl":"https://doi.org/10.24425/mms.2019.129575","url":null,"abstract":"The single-phase voltage loss is a common fault. Once the voltage-loss failure occurs, the amount of electrical energy will not be measured, but it is to be calculated so as to protect the interest of the power supplier. Two automatic calculation methods, the power substitution and the voltage substitution, are introduced in this paper. Considering the lack of quantitative analysis of the calculation error of the voltage substitution method, the grid traversal method and MATLAB tool are applied to solve the problem. The theoretical analysis indicates that the calculation error is closely related to the voltage unbalance factor and the power factor, and the maximum calculation error is about 6% when the power system operates normally. To verify the theoretical analysis, two three-phase electrical energy metering devices have been developed, and veriﬁcation tests have been carried out in both the lab and ﬁeld conditions. The lab testing results are consistent with the theoretical ones, and the ﬁeld testing results show that the calculation errors are generally below 0.2%, that is correct in most cases.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47138737","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

Electrochemical capacitor temperature fluctuations during charging/discharging processes 电化学电容器在充放电过程中的温度波动

IF 1 4区工程技术

Metrology and Measurement Systems Pub Date : 2023-07-20 DOI: 10.24425/MMS.2019.126338

S. Galla, A. Szewczyk, Ł. Lentka

引用次数: 4