Three-dimensional PEA charge measurement system

This paper researches on the non-contact online detection of concentricity error, which mainly focus on the structural principle of the measurement system and the concentricity error evaluation methods. The paper using the method of projection, converting the three-dimensional model to a two-dimensional model and evaluating coaxially error. And it is validated by the simulation of MATLAB. In theory, the proposed measurement system can measure geometric tolerance, including coaxially error, cylindricity error, circularity error, etc.

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A three-dimensional measurement system based on moiré interferometry for visual inspection of hemi-sphere objects

10.1109/iccas.2007.4406837 ◽

2007 ◽

Author(s):

Min Young Kim

Keyword(s):

Measurement System ◽

Visual Inspection ◽

Three Dimensional ◽

Dimensional Measurement ◽

Three Dimensional Measurement

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An Acoustic System for Pipeline Profile Measurement

Journal of Energy Resources Technology ◽

10.1115/1.3230956 ◽

1983 ◽

Vol 105 (4) ◽

pp. 475-479

Author(s):

H. Van Calcar

Keyword(s):

Measurement Technique ◽

Measurement System ◽

Performance Enhancement ◽

Three Dimensional ◽

Profile Measurement ◽

Baseline Measurement ◽

Acoustic System ◽

Position Measurement ◽

Long Baseline ◽

Hardware Configuration

This paper presents an acoustic position measurement system used for precise three-dimensional flowline profile measurement. The system measures several points along the flowline using the long-baseline measurement technique and augments this measurement with depth telemetry repeaters to maintain elevation accuracy throughout the changing installation geometry. The paper discusses both the measurement system and the performance enhancement features. The paper concludes with a discussion of the hardware configuration and the accuracy that can be expected when the technique is extended into deeper operating areas.

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Three-Dimensional Stereometric Measurement System Using Optical Scanners, Cylindrical Lenses, And Line Sensors

10.1117/12.966000 ◽

1983 ◽

Cited By ~ 2

Author(s):

Yasuo Yamashita ◽

Nobumasa Suzuki ◽

Masamitsu Oshima ◽

Yoshiomi Yamaguchi

Keyword(s):

Measurement System ◽

Three Dimensional ◽

Optical Scanners

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Measurement on Reaction Time of Visual Attention in Depth during Driving

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.319.343 ◽

2013 ◽

Vol 319 ◽

pp. 343-347

Author(s):

Ru Ting Xia ◽

Xiao Yan Zhou

Keyword(s):

Reaction Time ◽

Visual Attention ◽

Measurement System ◽

Low Vision ◽

Three Dimensional ◽

Depth Information ◽

Attention Shifting ◽

3D Space ◽

Traffic Environment ◽

3D Attention

This research aimed to reveal characteristics of visual attention of low-vision drivers. Near and far stimuli were used by means of a three-dimensional (3D) attention measurement system that simulated traffic environment. We measured the reaction time of subjects while attention shifted in three kinds of imitational peripheral environment illuminance (daylight, twilight and dawn conditions). Subjects were required to judge whether the target presented nearer than fixation point or further than it. The results showed that the peripheral environment illuminance had evident influence on the reaction time of drivers, the reaction time was slow in dawn and twilight conditions than in daylight condition, distribution of attention had the advantage in nearer space than farther space, that is, and the shifts of attention in 3D space had an anisotropy characteristic in depth. The results suggested that (1) visual attention might be operated with both precueing paradigm and stimulus controls included the depth information, (2) an anisotropy characteristic of attention shifting depend on the attention moved distance, and it showed remarkably in dawn condition than in daylight and twilight conditions.

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