International Symposium on Precision Engineering Measurement and Instrumentation最新文献_第4页

Adaptive segmentation method of pressed character image based on Wellner algorithm 基于Wellner算法的按压字符图像自适应分割方法

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI: 10.1117/12.2512141

Xili Duan, Jing Le, Yuyang Ming, Shaowei Chen, Mingxing Tang

{"title":"Adaptive segmentation method of pressed character image based on Wellner algorithm","authors":"Xili Duan, Jing Le, Yuyang Ming, Shaowei Chen, Mingxing Tang","doi":"10.1117/12.2512141","DOIUrl":"https://doi.org/10.1117/12.2512141","url":null,"abstract":"The image of pressed characters on the surface of metal workpieces in industry has obvious unimodal characteristics, for this feature, this paper proposes an adaptive segmentation method based on Wellner algorithm, this method is used to segment the pressed character image whose character gray value is similar to background gray value. Firstly, we use uniform illumination to capture grayscale images. Next, the Retinex algorithm is used to enhance the details of the character edge, the grayscale distribution range is expanded to improve the image contrast. Then, the bilateral filtering algorithm is used to filter the image noise. In this paper, the pixel gray value of a certain point is selected as the center, the row and column mean value of the pixel is calculated, at the same time, the mean value of the pixel gray value in the 8-connected region that it belongs to the pixel selected to be the center is calculated. The algorithm applies the “center-around” idea, the Wellner algorithm is improved with the mean value and the image pixel points are traversed to achieve image binarization. Finally, the final segmentation result is obtained by combining morphological operations. The verification experimental results show that the proposed method has good self-adaptiveness and accuracy for the gray-scale histogram image with unimodal characteristics.","PeriodicalId":115119,"journal":{"name":"International Symposium on Precision Engineering Measurement and Instrumentation","volume":"279 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115762922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-calibration method of precision shafting angle measurement error based on multiple reading heads 基于多读头的精密轴系角度测量误差自校正方法

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI: 10.1117/12.2511826

Run Zhang, Wenhui Bao, Huining Zhao, Hua-Kun Jia, Liandong Yu

{"title":"Self-calibration method of precision shafting angle measurement error based on multiple reading heads","authors":"Run Zhang, Wenhui Bao, Huining Zhao, Hua-Kun Jia, Liandong Yu","doi":"10.1117/12.2511826","DOIUrl":"https://doi.org/10.1117/12.2511826","url":null,"abstract":"With the continuous improvement of equipment measurement accuracy and production efficiency requirements, calibration method with external reference standard can no longer meet the quality and efficiency requirements. In order to solve the online calibration problem and effectively improve the calibration efficiency of the Articulated Arm Coordinate Measuring Machines (AACMMs) in practical application, a self-calibration system of circular grating angle sensor which is applied to joints of the AACMMs was established. Based on the harmonic analysis of the angle measurement error, this paper deduces and analyzes the error suppression principle of the layout of the scanning heads on the calibration result, and establishes a non-uniform layout of the scanning heads to eliminate more and higher order harmonic errors. The simulation and test results show that the self-calibration method using this layout form of multiple reading heads can effectively reduce the measurement angle error without increasing the number of scanning heads, and improve the calibration efficiency and measurement accuracy of AACMMs.","PeriodicalId":115119,"journal":{"name":"International Symposium on Precision Engineering Measurement and Instrumentation","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115528693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Development of optic-electronic autocollimators for monitoring the angular displacements of large objects 用于监测大物体角位移的光电自准直仪的研制

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI: 10.1117/12.2512110

I. Konyakhin

引用次数: 0

A novel two-dimensional inductive sensor based on planar coils 一种基于平面线圈的新型二维电感传感器

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI: 10.1117/12.2517681

Liang Wu, Shi Xu, Yangyang Wang, Rui Zhang, Yang Liu

{"title":"A novel two-dimensional inductive sensor based on planar coils","authors":"Liang Wu, Shi Xu, Yangyang Wang, Rui Zhang, Yang Liu","doi":"10.1117/12.2517681","DOIUrl":"https://doi.org/10.1117/12.2517681","url":null,"abstract":"The precision measurement of two-dimensional displacements is needed in many domains, such as precision fabrication and detection. This paper presents a novel inductive position sensor with the capability of measuring displacements in x- and y- directions simultaneously. The sensor consists of two parts: a ferromagnetic plate with primary windings which are composed of four layers of planar coils, a ferromagnetic plate with secondary windings which are composed of four layers of planar coils. Primary windings are supplied with two orthogonal 20KHz alternating current to generate traveling wave magnetic field along x- and y- directions separately. Secondary windings output two signals whose phases are proportional to linear displacements of X and Y directions respectively. The structure and working principles of the sensor are proposed. Meanwhile, a sensor model is simulated to verify the feasibility of the working principle and a sensor prototype is fabricated for physical experiment. According to the analysis of experiment results, the measurement range is 140mm×140mm, and the maximum linearity in one pitch is 1%. The performance of sensor may be improved by optimizing the layout of primary and secondary windings and signal processing circuit.","PeriodicalId":115119,"journal":{"name":"International Symposium on Precision Engineering Measurement and Instrumentation","volume":"11 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113975642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A compact design of optical scheme for a two-probe absolute surface encoders 一种紧凑的双探头绝对面编码器光学方案设计

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI: 10.1117/12.2512191

Xinghui Li, Yaping Shi, Peirong Wang, K. Ni, Qian Zhou, Xiaohao Wang

{"title":"A compact design of optical scheme for a two-probe absolute surface encoders","authors":"Xinghui Li, Yaping Shi, Peirong Wang, K. Ni, Qian Zhou, Xiaohao Wang","doi":"10.1117/12.2512191","DOIUrl":"https://doi.org/10.1117/12.2512191","url":null,"abstract":"An improved optical scheme of planar encoder is presented in this paper. The modulation of diffractive beams from scale grating and reference grating is analyzed systematically. Based on this analysis, independent modulation of eight diffractive beams from scale grating and reference grating, with no cross effect between each other, is achieved with an improved design of easy to adjust and simplicity in structure, cost-effectiveness and flexibility in use. Furthermore, in this research, the optical configuration of the planar encoder was divided into three function areas, modulation of diffractive beams, optical subdivision and photoelectric detection. Separate design decreases the coupling relationship between various optical elements, which improves the convenience of optical alignment and reduces the cumulative error in debugging process to a certain extent. In this study, a standard interference ranging system is set up by using a grating with a 1μm period. The typical four path interference signals are collected. The quality of the interference signal verified the feasibility and superiority of the innovative design.","PeriodicalId":115119,"journal":{"name":"International Symposium on Precision Engineering Measurement and Instrumentation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122836386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An enhanced homodyne laser vibrometer based on an auto-gain module 一种基于自动增益模块的增强型静差激光测振仪

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI: 10.1117/12.2512441

Ke Wang, Haijin Fu, Di Chang, P. Hu, Hongxing Yang, Ruitao Yang, Jiubin Tan

引用次数: 0

Real-time 3D shape measurement by fringe projection and GPU parallel computing 基于条纹投影和GPU并行计算的实时三维形状测量

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI: 10.1117/12.2512171

Huijie Zhao, Yang Xu, Hongzhi Jiang, Xiaochun Diao, Chenghao Liu, Mingyi Xing

引用次数: 0

Research of the polarization-optical parameters of a solid-state matrix photomultiplier 固态矩阵光电倍增管偏振光学参数的研究

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI: 10.1117/12.2511058

Anastasiya Y. Lobanova, V. Ryzhova, I. Konyakhin

{"title":"Research of the polarization-optical parameters of a solid-state matrix photomultiplier","authors":"Anastasiya Y. Lobanova, V. Ryzhova, I. Konyakhin","doi":"10.1117/12.2511058","DOIUrl":"https://doi.org/10.1117/12.2511058","url":null,"abstract":"The work is devoted to the research of the polarization-optical parameters of a solid-state matrix photomultiplier. The main parameters of the performance of the SiPM form from the sensitivity of the photodetector. As an object of study, a silicon photomultiplier ARRAY-C 60035-4P was chosen, which consists of 4 photosensitive sites. The pixels of the SiPM are avalanche photodiodes that are separated from each other by elements that do not participate in the formation of the useful signal and serve to suppress the secondary optical signal due to the optical coupling between. In this paper, experimental studies of the state of polarization reflected from the surface of each of the active regions of the matrix of a silicon photomultiplier are performed using a laser photoelectric ellipsometer LEF-3F-1. The action of the ellipsometer is based on the zero method of determining the polarization angles. In the course of the experiment the contractions of ellipsometric angles were determined. The experiment was carried out at four angles of incidence on the surface of the receiver, which corresponds to a set of reflective characteristics of a silicon photoelectric multiplier. With the help of these data, the estimation of the distribution of the reflection and transmission coefficients becomes possible, as well as the sensitivity distribution over the different sites of the SiPM.","PeriodicalId":115119,"journal":{"name":"International Symposium on Precision Engineering Measurement and Instrumentation","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125404514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization on metering accuracy of smart electricity meter by temperature compensation 基于温度补偿的智能电表计量精度优化

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI: 10.1117/12.2509352

Lu Wang, G. Zhai, X. Ye, M. Lv, Songmin Yu

{"title":"Optimization on metering accuracy of smart electricity meter by temperature compensation","authors":"Lu Wang, G. Zhai, X. Ye, M. Lv, Songmin Yu","doi":"10.1117/12.2509352","DOIUrl":"https://doi.org/10.1117/12.2509352","url":null,"abstract":"Smart electricity meters are playing an indispensable role in modern society, and their measurement accuracy affects the economic interests of both power units and users. In this paper, a compensating method based on neural network approximate modeling is proposed to increase the accuracy of electric energy measurement among the whole range of operational temperature. Based on the measurement data and the internal structure of the smart electricity meter, a MATLAB/Simulink model of the meter is built to evaluate the consistency of power measurement at different temperature levels. The FEM (finite element method) thermal simulation model of the meter device is carried out in ANSYS Icepak to obtain the temperature contours of the smart meter in different operating conditions. Afterwards, based on the simulation data, the component temperature in the metering circuit is evaluated according to the approximation model built by RBF (Radial basis function) neural network. At last, a temperature compensation program is realized in the MCU (Micro-Controller Unit) to adjust the metering accuracy. According to the final testing results, the proposed method significantly enhances the metering accuracy among full temperature range.","PeriodicalId":115119,"journal":{"name":"International Symposium on Precision Engineering Measurement and Instrumentation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130081144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A novel breakpoint detection method based on dynamic programming for linear laser scanner 一种基于动态规划的线性激光扫描器断点检测方法

International Symposium on Precision Engineering Measurement and Instrumentation Pub Date : 2019-03-07 DOI: 10.1117/12.2517178

Xiaoqia Yin, W. Tao, H Zhao

引用次数: 0