High-speed, high-precision focal length measurement using double-hole mask and advanced image sensor software

Cao, Binh Xuan; Hoang, Phuong Le; Ahn, Sanghoon; Kim, Jeng-o; Kang, Hee-Shin; Noh, Jiwhan

doi:10.1016/j.isatra.2018.01.018

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…The image sensor as well as its software are developed uniquely to read the distance between two beam spots based on the positions of their peak intensities [15].…”

Section: Figure 2 Schematic Diagram Of a Diffractive Beam Sampler [13]mentioning

confidence: 99%

Laser-based vibration measurement using diffractive beam samplers for vibration monitoring of large-scale bridges

Hoang,

Cao,

Nguyen

et al. 2023

UD-JST

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This paper introduces an innovative design for a laser-based apparatus employing diffractive beam sampling technology, with the primary purpose of characterizing vibration frequencies induced within large-scale bridges. The functioning principle of the device hinges upon its ability to discern minute alterations in the relative positions of a subset of the laser beam, resulting from the oscillatory behavior of a laser pendulum mechanism. The captured dynamic variations are seamlessly integrated into a real-time monitoring framework through the utilization of an adept image sensor, complemented by sophisticated software functionalities. Noteworthy for its amalgamation of straightforward implementation and remarkable precision, the proposed methodology stands as a potent instrument poised to ensure the secure and robust surveillance of the structural well-being of large-scale bridges.

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“…The image sensor as well as its software are developed uniquely to read the distance between two beam spots based on the positions of their peak intensities [15].…”

Section: Figure 2 Schematic Diagram Of a Diffractive Beam Sampler [13]mentioning

confidence: 99%

Laser-based vibration measurement using diffractive beam samplers for vibration monitoring of large-scale bridges

Hoang,

Cao,

Nguyen

et al. 2023

UD-JST

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“…The existing automatic bar screening usually adopts timing, grating length measurement and laser radar length measurement scheme [ 3 ]. Due to the vibration, motor speed change and other factors in the transmission process of anchor raw materials, the speed of raw materials is not constant, so the length measurement error is large.…”

Section: Introductionmentioning

confidence: 99%

Automatic raw material screening device for wind turbine foundation anchor bolt

Ding¹,

Wang²

2022

Third International Conference on Computer Science and Communication Technology (ICCSCT 2022)

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With excellent development prospects, wind power generation is one of the most important parts of new energy. Because it has a lot of advantages over traditional energy forms energy, such as availability, free pollution and renewability, etc, many researchers of different countries have concentrated on such field. As an important part of fan foundation, anchor bolt assembly realizes the transfer and dispersion of complex loads such as horizontal load, bending moment and torsion of wind turbine through anchoring, self-locking and synergistic action with concrete. In order to further promote the application of wind power generation, the cost reduction of equipment production involved in this field has attracted extensive attention; therefore, the automatic production of anchor bolt assembly has also become an important research direction in the production field. In the traditional production process of wind turbine foundation anchor bolt, manual screening method is adopted in this paper, and there is only one specification (diameter and length) of anchor bolt raw material on a production line at the same time. In this case, the efficiency of multi-task processing in the production line will be greatly reduced. Therefore, it is extremely important to develop control equipment that can realize automatic raw material screening and distribution.

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Auto-focus methods in laser systems for use in high precision materials processing: A review

Dinh

Hoang

et al. 2023

Optics and Lasers in Engineering

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High-speed, high-precision focal length measurement using double-hole mask and advanced image sensor software

Cited by 4 publications

References 24 publications

Laser-based vibration measurement using diffractive beam samplers for vibration monitoring of large-scale bridges

Laser-based vibration measurement using diffractive beam samplers for vibration monitoring of large-scale bridges

Automatic raw material screening device for wind turbine foundation anchor bolt

Auto-focus methods in laser systems for use in high precision materials processing: A review

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