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Application and evaluation of optical distance measurements in geometrical quality testing of microgears

Albert ALBERS, Duotai PAN, Leif MARXEN, Claudia BECKE,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 261-269 doi: 10.1007/s11465-010-0100-3

Abstract: gears, the quality assurance of microgears needs more accurately measured data and simple but feasible measurement

Keywords： microgear     optical distance measurement     profile deviation     CWL sensor     micromechanical technology (MMT)    

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Development of surface reconstruction algorithms for optical interferometric measurement

Dongxu WU, Fengzhou FANG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 1-31 doi: 10.1007/s11465-020-0602-6

Abstract: Optical interferometry is a powerful tool for measuring and characterizing areal surface topography inA variety of instruments based on optical interferometry have been developed to meet the measurementThe new developments in measurement accuracy and repeatability, noise resistance, self-calibration abilitytopography measurement.To address these challenges, advanced techniques in image stitching, on-machine measurement, intelligent

Keywords： surface topography     measurement     optical interferometry     coherence envelope     phase-shifting algorithm    

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A 14-year measurement of toxic elements in atmospheric particulates in Hong Kong from 1995 to 2008

Wei NIE,Tao WANG,Aijun DING,Xuehua ZHOU,Wenxing WANG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 4,   Pages 553-560 doi: 10.1007/s11783-013-0523-2

Abstract: In this study, we analyzed a 14-year (1995–2008) measurement of three toxic elements (As, Cd and Cr)the mainland of China is the dominant contributor to particulate As and Cd, while both local and long-distance

Keywords： toxic elements     increasing trends     seasonal variations     air masses     long-distance sources    

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A low cost wearable optical-based goniometer for human joint monitoring

Chee Kian LIM, Zhiqiang LUO, I-Ming CHEN, Song Huat YEO

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 1,   Pages 13-22 doi: 10.1007/s11465-011-0201-7

Abstract: fields of physical and occupational therapy, goniometers are indispensible when it comes to angular measurementOn the other hand, electronic and optical fiber-based goniometers promise better performance over itsIn this paper, we present a reliable and non-intrusive design of an optical-based goniometer for humanjoint measurement.The proposed device was benchmarked against mechanical goniometer and optical based motion capture system

Keywords： optical     goniometer     human-joint measurement    

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Improved directional-distance filter

JIN Lianghai, LI Dehua

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 205-211 doi: 10.1007/s11465-008-0025-2

Abstract: This paper proposes a new spatial-distance weighting function.By combining the weighting function and the traditional directional-distance filter (DDF) in a novelway, a new vector filter - the adaptive distance-weighted directional-distance filter (ADWDDF) - is presented

Keywords： information     distance-weighted directional-distance     ADWDDF     traditional DDF     spatial-distance weighting    

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Study on the ultrasonic distance measurement system for seabed coblat crusts microtopography based on

Liu Ai’jun,Zhou Zhijin,Bu Yingyong,Long Yingchun

Strategic Study of CAE 2009, Volume 11, Issue 8,   Pages 79-82

Abstract:

ccording to the principle of single-beam measurement, using ultrasonicThe product of delay time and ultrasonic wave velocity is the distance between ultrasonic transducer

Keywords： deep-sea coblat-crusts     microtopography     LMS     single-beam measurement     adaptive filtering    

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Analyzing the Effect of the Intra-Pixel Position of Small PSFs for Optimizing the PL of Optical Subpixel Article

Haiyang Zhan, Fei Xing, Jingyu Bao, Ting Sun, Zhenzhen Chen, Zheng You, Li Yuan

Engineering 2023, Volume 27, Issue 8,   Pages 140-149 doi: 10.1016/j.eng.2023.03.009

Abstract: positions of point-like images captured by pixelated image sensors have been widely used in diverse opticalmeasurement fields.paving the way for thoroughly understanding and achieving the final optimum of the precision limit in optical

Keywords： Optical measurement     Subpixel localization     Precision limit optimization     Small point spread functions    

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Displacement measuring grating interferometer: a review Special Feature on Precision Measurement and Inst

Peng-cheng HU, Di CHANG, Jiu-bin TAN, Rui-tao YANG, Hong-xing YANG, Hai-jin FU

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5,   Pages 631-654 doi: 10.1631/FITEE.1800708

Abstract:

A grating interferometer, called the “optical encoder,” is a commonly used tool for precise displacementClassified based on the measuring principle and optical configuration, a grating interferometer experiencesMeanwhile, numerous structures of grating interferometers with a high optical fold factor, a large measurement

Keywords： Grating interferometer     Optical encoder     Displacement measurement     Precision measurement    

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New method of fault diagnosis of rotating machinery based on distance of information entropy

Houjun SU, Tielin SHI, Fei CHEN, Shuhong HUANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 249-253 doi: 10.1007/s11465-011-0124-3

Abstract: feature index monitoring and diagnosing the vibration fault of rotating machinery, which is called distanceThe mathematic deduction suggests that the conception of distance of information entropy is accordantThen, the accuracy of rotor fault diagnosis can be improved through the curve chart of the distance of

Keywords： rotating machinery     information fusion     fault diagnosis     Information entropy     distance of the information    

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density measurement for plastic injection molding via ultrasonic technology

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0714-2

Abstract: Therefore, in-situ density measurement is of great interest and has significant application valueThis study is the first to propose an in-situ density measurement method using ultrasonic technologyThe proposed method has the advantages of in-situ measurement, non-destructive, high accuracy,

Keywords： ultrasonic measurement     melt density     in-situ measurement     injection molding    

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Construction survey technology on concrete construction of Three Gorges Project ship lift tower

Luo Chen,Yan Chunbo

Strategic Study of CAE 2013, Volume 15, Issue 9,   Pages 97-101

Abstract: concrete body and built-in embedded parts, the plane, elevation datum transmission and positioning measurementThe construction survey technologies, including zenith telescope planar cast point, electromagnetic distancecylindrical nut type positioning device with a sighting mark in center are applied to size-control measurementfor concrete structure and positioning measurement for built-in embedded parts respectively.

Keywords： construction survey     zenith telescope cast point     electromagnetic distance measuring     spatial positioningmeasurement for casing     Three Gorges Project ship lift    

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Performance Analysis and Evaluation of Geometric Parameters in Stereo Deflectometry Article

Yongjia Xu, Feng Gao, Xiangqian Jiang

Engineering 2018, Volume 4, Issue 6,   Pages 806-815 doi: 10.1016/j.eng.2018.10.007

Abstract:

This paper presents a novel geometric parameters analysis to improve the measurement accuracy of stereothis paper, four geometric parameters of a stereo deflectometry system are analyzed and evaluated: the distanceand the measured object surface, the angle between the main camera ray and the surface normal, the distanceThe influence of the geometric parameters on the measurement accuracy is evaluated.The experimental results confirm the impact of these parameters on the measurement accuracy.

Keywords： Optical metrology     Error analysis     Stereo deflectometry     Three-dimensional shape measurement     Performance    

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Design and calibration of a new high-definition three-dimensional laparoscopic system

Jia TANG,Li-qiang WANG,Bo YUAN,Hong JIANG,Qi-ming ZHU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 1,   Pages 79-84 doi: 10.1631/FITEE.1400149

Abstract: We present a high-definition (HD) 3D laparoscopic system including a dual channel optical system, twoA modified pinhole camera model is used for camera calibration and a new method of depth measurementThe average error of depth measurement measured by experiment (about 1.13 mm) was small in proportionto the large range in distance of the system (10-150 mm).

Keywords： Dual optical channels     Three dimensional     Camera calibration     Pinhole model     Depth measurement     Laparoscopic    

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Efficient utilization of wind power: Long-distance transmission or local consumption?

Yuanzhang SUN, Xiyuan MA, Jian XU, Yi BAO, Siyang LIAO

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 440-455 doi: 10.1007/s11465-017-0440-3

Abstract: Excess wind power produced in wind-intensive areas is normally delivered to remote load centers via long-distanceThis paper presents a comparison between long-distance transmission, which has gained popularity, andFirst, the challenges and solutions to the long-distance transmission and local consumption of wind power

Keywords： wind power     long-distance transmission     local consumption     supermicrogrid    

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Precision glass molding: Toward an optimal fabrication of optical lenses

Liangchi ZHANG,Weidong LIU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 3-17 doi: 10.1007/s11465-017-0408-3

Abstract: and time consuming to use machining processes, such as grinding, polishing and lapping, to produce opticalPrecision glass molding (PGM) has thus been developed to realize an efficient manufacture of such opticalFor example, a PGM process must be carried out within the super-cooled region of optical glass abovemanufacturing chain consideration from mold material selection, property and deformation characterization of optical

Keywords： precision glass molding     optical lens     constitutive modeling     optimization     manufacturing chain     Industry    

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Title Author Date Type Operation

Application and evaluation of optical distance measurements in geometrical quality testing of microgears

Albert ALBERS, Duotai PAN, Leif MARXEN, Claudia BECKE,

Journal Article

Development of surface reconstruction algorithms for optical interferometric measurement

Dongxu WU, Fengzhou FANG

Journal Article

A 14-year measurement of toxic elements in atmospheric particulates in Hong Kong from 1995 to 2008

Wei NIE,Tao WANG,Aijun DING,Xuehua ZHOU,Wenxing WANG

Journal Article

A low cost wearable optical-based goniometer for human joint monitoring

Chee Kian LIM, Zhiqiang LUO, I-Ming CHEN, Song Huat YEO

Journal Article

Improved directional-distance filter

JIN Lianghai, LI Dehua

Journal Article

Study on the ultrasonic distance measurement system for seabed coblat crusts microtopography based on

Liu Ai’jun,Zhou Zhijin,Bu Yingyong,Long Yingchun

Journal Article

Analyzing the Effect of the Intra-Pixel Position of Small PSFs for Optimizing the PL of Optical Subpixel

Haiyang Zhan, Fei Xing, Jingyu Bao, Ting Sun, Zhenzhen Chen, Zheng You, Li Yuan

Journal Article

Displacement measuring grating interferometer: a review

Peng-cheng HU, Di CHANG, Jiu-bin TAN, Rui-tao YANG, Hong-xing YANG, Hai-jin FU

Journal Article

New method of fault diagnosis of rotating machinery based on distance of information entropy

Houjun SU, Tielin SHI, Fei CHEN, Shuhong HUANG

Journal Article

density measurement for plastic injection molding via ultrasonic technology

Journal Article

Construction survey technology on concrete construction of Three Gorges Project ship lift tower

Luo Chen,Yan Chunbo

Journal Article

Performance Analysis and Evaluation of Geometric Parameters in Stereo Deflectometry

Yongjia Xu, Feng Gao, Xiangqian Jiang

Journal Article

Design and calibration of a new high-definition three-dimensional laparoscopic system

Jia TANG,Li-qiang WANG,Bo YUAN,Hong JIANG,Qi-ming ZHU

Journal Article

Efficient utilization of wind power: Long-distance transmission or local consumption?

Yuanzhang SUN, Xiyuan MA, Jian XU, Yi BAO, Siyang LIAO

Journal Article

Precision glass molding: Toward an optimal fabrication of optical lenses

Liangchi ZHANG,Weidong LIU

Journal Article