Research on the Calibration Method for Analog Measuring Instrument

2014 ◽  
Vol 926-930 ◽  
pp. 1554-1557
Author(s):  
Xiao Ju Ma ◽  
Yu Gao ◽  
Lin Yun Zhou
Keyword(s):  
Template Matching ◽  
Calibration Method ◽  
Measuring Instruments ◽  
Measuring Instrument ◽  
Bottom Line ◽  
Instrument Calibration ◽  
Analog Measuring ◽  
Rectangular Area

This paper presents a pointer instrument calibration method based on template matching, which segments the image that area closest to the pointer by setting the width on the basis of the meter needle positioning, scans the region from top to bottom line by line, determines smaller rectangular area containing calibration digital only, uses template matching to identify numbers theory to identify the calibration digital in the region. Experiments show that this method can identify the calibration digital quickly and efficiently in analog measuring instruments.

Research on Pointer Locating for Analog Measuring Instrument

2013 ◽  
Vol 444-445 ◽  
pp. 1395-1399
Author(s):  
Quan Wu Li ◽  
Bo Li ◽  
Yu Hui Li ◽  
Hui Juan Liu
Keyword(s):  
Linear Theory ◽  
Hough Transform ◽  
Measuring Instruments ◽  
Measuring Instrument ◽  
Analog Measuring ◽  
Rectangular Area ◽  
Positioning Method ◽  
Bottom To Top

This paper presents a pointer positioning method based on Hough transform, which turns an arc scale to a transverse rectangular scales, scans the region from bottom to top line by line, determines smaller rectangular area containing pointer only, uses Hough transform in linear theory to detect the pointer position in the region. Experiments show that this method can locate the pointer position quickly and efficiently in analog measuring instruments.

scholarly journals ALAT UKUR INDUKTANSI DIGITAL BERBASIS ATMEGA 32

2016 ◽  
Vol 19 (1) ◽  
pp. 1
Author(s):  
Hanna Fury Nur Ramdany ◽  
Heru Winarno
Keyword(s):  
Research Method ◽  
Laboratory Tests ◽  
Percentage Error ◽  
Average Error ◽  
Measuring Instruments ◽  
Measuring Instrument ◽  
Oscillator Circuit ◽  
Analog Measuring ◽  
Error Ratio ◽  
Lcr Meter

Hanna Fury Nur Ramdany, Heru Winarno in this paper explain that inductors have an important role in the field of electronics. Many values of capacitors and inductors whose values are difficult to translate, namely when capacitors and inductors are of low value and the color of the print is less clear , also considering the human read factor  when an analog measuring instrument is used. From these problems, it is designed an inductance measuring instrument (L Meter) whose results can be directly displayed.The research method used in the manufacture of inductance meter measuring instruments is the literature method and laboratory tests using frequency variables generated or read by the oscillator circuit. The inductance measuring instrument designed in this researc is simple and meticulous measuring instrument that can be read and used by everyone. This digital inductance meter can be used to measure inductance - inductance with a level or a range of measurements between 20μH –100mH.The lower the inductor value measured, the higher the percentage error. So that the tools designed must be able to work well. The average error ratio of an inductance meter with a standard LCR meter is 6.5%. . Keywords: Measuring, Inductor, Microcontroller and LCD DisplayReferencesMimail,B. (2011) Dasar Teknik Elektro Rangkaian Listrik.Malang UB Press.Malvino, A.P. (1979). Prinsip-Prinsip Elektronik Edisi Kedua (terjemahan Hanapi Gunawan). Jakarta:Erlangga.Malvino, A.P. (1996). Prinsip-Prinsip Dasar Elektronika Edisi Ketiga (terjemahan Prof. M. Barmawi, Ph.D. , M.O. Tjia, Ph.D., Departemen Fisika, Institut Teknlogi Bandung). Jakarta: Erlangga.Bishop, O. (2004). Dasar-Dasar Elektronika (terjemahan Irzam Harmein S.T). Jakarta: Erlangga.Yuliana, E. (2006). Rancang Bangun Alat Induktansi dan Kapasitansi Meter. Semarang. Universitas Negeri Semarang.Amallia, F. (2009). Rancang Bangun Kapasitansi dan Induktansi Meter Menggunakan Mikrokontroler Atmega8 Dengan Tampilan LCD. Jakarta. Universitas Mercu Buana.Frank D, Petrezuella. (2001). Elektronika Industri. Yogyakarta: Andi

METHOD FOR ESTIMATING ERRORS IN MEASURING INSTRUMENTS BY THE SPACE CATALOGUE ORBITS

2018 ◽  
pp. 76-84
Author(s):  
K. V. Sorokin ◽  
E. A. Sunarchina
Keyword(s):  
Dynamic Model ◽  
New Method ◽  
Measuring Instruments ◽  
Measuring Instrument ◽  
Software Complex

Improvement of orbits precision is one of the most important tasks of space surveillance catalogue maintenance. The solution of this problem is directly related to an adequate consideration of the errors of the coordinate information from the measuring instruments. The article consideresd a new method for estimating the precision of measuring instruments on the catalog orbits. To carry out such analysis, in PJSC «VIMPEL» special technological program was created. Main results of a study of radar errors with orbits of space surveillance catalogue was presented. Also, the results were compared with data of measuring instrument's calibration software complex. This software complex provides determination of satellite's position with errors less than 10 m. A new dynamic model of measuring instrument errors is proposed.

The measurement problem of calibration of measuring instrument under specified conditions

2021 ◽  
pp. 9-15
Author(s):  
Sergey F. Levin
Keyword(s):  
Risk Assessment ◽  
Risk Management ◽  
Measurement Problem ◽  
Parametric Identification ◽  
Correction Function ◽  
Measuring Instruments ◽  
Measuring Instrument ◽  
Mathematical Apparatus ◽  
Second Stage ◽  
Assessment Techniques

The problem of calibration of measuring instruments for given conditions based on the correction function is considered as a measurement problem of structural-parametric identification of the calibration diagram. It is shown, that the correction function allows at the first stage to obtain a ratio for correcting the readings, and at the second stage to obtain a corrected measurement result, it is necessary to identify the probability distribution of possible deviations from it. An example of solving the measurement problem of calibration for given conditions is given. Negative aspects of the practice of calibration of measuring instruments are noted: carrying out calibration under normal conditions according to the methods of verification of measuring instruments; presentation of calibration results by tables of joint readings of measuring instruments and standards; the presence in the calculations of the calibration diagram of significant restrictions on the mathematical apparatus of the «Guidelines for the expression of measurement uncertainty», specified by ISO/IEC 31010:2019 “Risk management – Risk assessment techniques”.

scholarly journals The Contribution of Workload and Stress towards Burnout in Special Needs Teachers

2021 ◽  
Author(s):  
Bakhitah Jihan Wijaya ◽  
Endang Prastuti
Keyword(s):  
Special Needs ◽  
Maslach Burnout Inventory ◽  
Measuring Instruments ◽  
Measuring Instrument ◽  
Students With Special Needs ◽  
Stress Theory ◽  
And Coping ◽  
Stress Measuring ◽  
Analysis Models ◽  
Effective Contribution

This study evaluates the effect of workload and coping stress in special needs teachers, and considers the probability of burnout. 68 special needs teachers in Malang form the basis of this study and several measuring instruments were used, including the Maslach Burnout Inventory (MBI) developed by Maslach, the NASA-TLX developed by Sandra, and a coping stress measuring instrument which refers to the coping stress theory by Lazarus and Folkman. This study used the descriptive quantitative method, while the Pearson Product Moment correlation and Corrected Item Total were used to test the item discrimination index. Alpha Cornbach was used to test the reliability. Descriptive and double linier regression analysis models were used. The results show that (1) there is an effect of workload towards burnout (2) there is an effect of coping stress towards burnout (3) there is an effect of workload and coping stress toward burnout with 22.44% effective contribution. Keywords: coping stress, workload, burnout, teacher of students with special needs

Examining Multidimensional Measuring Instruments for Proximity to Unidimensional Structure Using Latent Variable Modeling

2020 ◽  
pp. 001316442094076
Author(s):  
Tenko Raykov ◽  
Matthias Bluemke
Keyword(s):  
Latent Variable ◽  
Social Research ◽  
General Structure ◽  
Latent Variable Modeling ◽  
Measuring Instruments ◽  
Interval Estimate ◽  
Measuring Instrument ◽  
Scale Test ◽  
Explained Variance ◽  
Unidimensional Structure

A widely applicable procedure of examining proximity to unidimensionality for multicomponent measuring instruments with multidimensional structure is discussed. The method is developed within the framework of latent variable modeling and allows one to point and interval estimate an explained variance proportion-based index that may be considered a measure of proximity to unidimensional structure. The approach is readily utilized in educational, behavioral, and social research when it is of interest to evaluate whether a more general structure scale, test, or measuring instrument could be treated as being associated with an approximately unidimensional latent structure for some empirical purposes.

Self-Calibration of XY-Stage with Parallel Mechanism

2014 ◽  
Vol 590 ◽  
pp. 126-129
Author(s):  
Ryoshu Furutani ◽  
Satoshi Yokouchi ◽  
Miyu Ozaki
Keyword(s):  
High Precision ◽  
Parallel Mechanism ◽  
Least Squares Method ◽  
Calibration Method ◽  
Measuring Instruments ◽  
Precision Manufacturing ◽  
Kinematic Parameters ◽  
Self Calibration ◽  
Simulation And Experiment ◽  
Experimental Process

It is important to calibrate the straightness and the squareness of the XY-stage for precision manufacturing and measurement. Normally it is calibrated using much higher precise and accurate measuring instruments and/or artifacts. The high precision and accurate instruments and artifacts are expensive. So, in this paper, Self-calibration method is applied to XY-stage. This method does not require any much high precision and accurate instruments and artifacts. The normal XY-stage moves to the location at the unique coordinates. In this case, it is difficult to apply self-calibration method. Therefore, XY-stage is expanded to XYθ-stage with parallel mechanism. As this stage moves to the location at a lot of coordinates, self-calibration method is applied. This method is confirmed in simulation and experiment. In simulation, the extension lengths of mechanism are estimated from known kinematic parameters and the target coordinates. After that, estimated kinematic parameters are calculated by least-squares method from the extension lengths and the target coordinates. Finally, the positioning coordinates are calculated from the estimated kinematic parameters and the extension lengths. It is proved that the calibration method is effective by comparing the target coordinates and the positioning coordinates. In experiment, the experimental process is similar to the simulation without the estimation of extension lengths. The results of simulation and experiment are shown in this paper.

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