High-speed 3D surface measurement with mechanical projector

2017 ◽  
Author(s):  
Jae-Sang Hyun ◽  
Song Zhang
Keyword(s):  
High Speed ◽  
Surface Measurement ◽  
3D Surface

scholarly journals High-speed and high-accuracy 3D surface measurement using a mechanical projector

2018 ◽  
Vol 26 (2) ◽  
pp. 1474 ◽  
Author(s):  
Jae-Sang Hyun ◽  
George T.-C. Chiu ◽  
Song Zhang
Keyword(s):  
High Speed ◽  
High Accuracy ◽  
Surface Measurement ◽  
3D Surface

High-speed 3D surface measurement with a fringe projection based optical sensor

2014 ◽  
Author(s):  
Christian Bräuer-Burchardt ◽  
Stefan Heist ◽  
Peter Kühmstedt ◽  
Gunther Notni
Keyword(s):  
Optical Sensor ◽  
High Speed ◽  
Fringe Projection ◽  
Surface Measurement ◽  
3D Surface

scholarly journals Fast 3D Surface Measurement with Wrapped Phase and Pseudorandom Image

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4185 ◽  
Author(s):  
Liu ◽  
He ◽  
Hu ◽  
Liu
Keyword(s):  
High Speed ◽  
Image Acquisition ◽  
Three Dimensional ◽  
Experimental System ◽  
Surface Measurement ◽  
Image Method ◽  
Epipolar Constraint ◽  
Pattern Projection ◽  
3D Surface ◽  
Measurement Results

Balancing the accuracy and speed of three-dimensional (3D) surface measurement of objects is crucial in many important applications. In this paper, we present a wrapped phase and pseudorandom image method and develop an experimental system aiming to avoid the process of phase unwrapping. Our approach can reduce the length of image sequences and improve the speed of pattern projection and image acquisition and can be used as a good candidate for high-speed 3D measurement. The most critical step in our new methodology is using the wrapped phase and the epipolar constraint between one camera and a projector, which can obtain several candidate 3D points within the measurement volume (MV). The false points from the obtained candidate 3D points can be eliminated by the pseudorandom images. A systematic accuracy with MV better than 0.01 mm is achievable. 3D human body measurement results are given to confirm the fast speed of image acquisition capability.

scholarly journals Data-Driven Intelligent 3D Surface Measurement in Smart Manufacturing: Review and Outlook

Machines ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 13
Author(s):  
Yuhang Yang ◽  
Zhiqiao Dong ◽  
Yuquan Meng ◽  
Chenhui Shao
Keyword(s):  
High Resolution ◽  
High Performance ◽  
Sampling Design ◽  
Three Dimensional ◽  
Measurement Data ◽  
Data Driven ◽  
Surface Measurement ◽  
Smart Manufacturing ◽  
Future Research ◽  
3D Surface

High-fidelity characterization and effective monitoring of spatial and spatiotemporal processes are crucial for high-performance quality control of many manufacturing processes and systems in the era of smart manufacturing. Although the recent development in measurement technologies has made it possible to acquire high-resolution three-dimensional (3D) surface measurement data, it is generally expensive and time-consuming to use such technologies in real-world production settings. Data-driven approaches that stem from statistics and machine learning can potentially enable intelligent, cost-effective surface measurement and thus allow manufacturers to use high-resolution surface data for better decision-making without introducing substantial production cost induced by data acquisition. Among these methods, spatial and spatiotemporal interpolation techniques can draw inferences about unmeasured locations on a surface using the measurement of other locations, thus decreasing the measurement cost and time. However, interpolation methods are very sensitive to the availability of measurement data, and their performances largely depend on the measurement scheme or the sampling design, i.e., how to allocate measurement efforts. As such, sampling design is considered to be another important field that enables intelligent surface measurement. This paper reviews and summarizes the state-of-the-art research in interpolation and sampling design for surface measurement in varied manufacturing applications. Research gaps and future research directions are also identified and can serve as a fundamental guideline to industrial practitioners and researchers for future studies in these areas.

The Research of Error Compensation for the 3D Surface Measurement

2012 ◽  
Vol 482-484 ◽  
pp. 2192-2196
Author(s):  
Yuan Tian ◽  
Zi Ma ◽  
Peng Li
Keyword(s):  
Measurement Error ◽  
Fuzzy Inference System ◽  
Error Compensation ◽  
Point Cloud ◽  
Fuzzy Inference ◽  
Surface Measurement ◽  
Anfis Model ◽  
Inference System ◽  
Surface Error ◽  
3D Surface

For improving precision of 3D surface measurement equipments, which are playing important role in reverse engineering, the Adaptive Network based Fuzzy Inference System (ANFIS) is developed to reconstruct 3D surface error, and the measurement error of point cloud is compensated by the presented 3D error ANFIS model. The precision of 3D surface measurement equipments has been improved noticeably

Microwave Holographic Surface Measurement of the Tidbinbilla 64-m Antenna

1983 ◽  
Vol 5 (2) ◽  
pp. 270-272 ◽  
Author(s):  
Y. Rahmat-Samii ◽  
S. Gulkis ◽  
G.S. Levy ◽  
B.L Seidel ◽  
L.E. Young ◽  
...  
Keyword(s):  
High Speed ◽  
Survey Methods ◽  
Low Cost ◽  
Single Frequency ◽  
Surface Measurement ◽  
Antenna Aperture ◽  
Phase Fluctuations ◽  
Surface Deviations ◽  
Antenna Surface ◽  
Surface Figure

The ‘holographic’ technique for accurately measuring the surface figure of large reflector antennas, described by Bennet et al, (1976) and Scott and Ryle (1977), has many advantages over older conventional survey methods. These include high speed, low cost, and the absence of any need for additional complex mechanical or optical survey devices. In essence, the technique consists of measuring the complex far-field response of the antenna at a single frequency using a terrestrial, satellite-borne or celestial radiation source of small angular diameter. This two-dimensional pattern is then Fourier-transformed to yield the complex illumination function across the antenna aperture. Antenna surface deviations are manifested as phase fluctuations in this function. In practice, a second antenna is needed to provide a phase reference.

Simultaneous high-speed measurement of 3D surface shape and temperature

2019 ◽  
Author(s):  
Martin Landmann ◽  
Stefan Heist ◽  
Patrick Dietrich ◽  
Peter Lutzke ◽  
Ingo Gebhart ◽  
...  
Keyword(s):  
High Speed ◽  
Surface Shape ◽  
Speed Measurement ◽  
3D Surface
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