An Enhanced Detection System of Drill Rod Bending Degree Based on Two-Dimensional Laser

Wu, Lingling; Wen, Gongjian; Wang, Yudan; Xu, Xiaojun

doi:10.3390/s20020370

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…Another example of measuring the straightness of long products is based on arc detection [13][14][15][16][17][18]. A laser projects a line onto the rod's surface forming an elliptical arc, which is captured by a camera and evaluated.…”

Section: Introduction To Straightness Measurementmentioning

confidence: 99%

Laser scanning–based straightness measurement of precision bright steel rods at one point

Schmid-Schirling

Kraft

Carl

2021

Int J Adv Manuf Technol

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In industrial manufacturing of bright steel rods, one important quality factor is the straightness or straightness deviation. Depending on the application, deviations of less than 0.1 mm per meter rod length are desired and can be reached with state-of-the-art manufacturing equipment. Such high-quality requirements can only be guaranteed with continuous quality control. Manual straightness measurements conducted offline using a dial gauge provide accurate results on single positions of the rod. We propose a contactless, optical measurement technique based on laser scanning which has the potential to be used inline during production to inspect all rods over the entire length. Only for calibration of the system the rod needs to be turned around its axis. For the measurement of straightness deviation, it is not required to turn the rod. The method is based on evaluating the intensity signal of the reflected laser radiation against the scan angle. It is shown that in combination with an accurate calibration, this signal can be used to determine the rod’s deviation from a straight rod. We explain the measurement and calibration principle as well as data evaluation. We present the experimental setup and first measurement results on a single position on several samples. For a homogeneous sample surface and neglecting laser drift, accuracy and precision were determined to be in the range of 10–20 μm. We discuss the working principle of a potential inline system.

show abstract

Section: Introduction To Straightness Measurementmentioning

confidence: 99%

Laser scanning–based straightness measurement of precision bright steel rods at one point

Schmid-Schirling

Kraft

Carl

2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Another example of measuring the straightness of long products is based on arc detection [11,12,13,14,15,16]. A laser projects a line onto the rod's surface forming an elliptical arc, which is captured by a camera and evaluated.…”

mentioning

confidence: 99%

Laser scanning based straightness measurement of precision bright steel rods

Schmid-Schirling¹,

Kraft²,

Carl³

2021

Preprint

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In industrial manufacturing of bright steel rods one important quality factor is the straightness or straightness deviation. Depending on the application, deviations of less than 0.1 mm per meter rod length are desired and can be reached with state of the art manufacturing equipment. Such high quality requirements can only be guaranteed with continuos quality control. Manual straightness measurements conducted offline using a dial gauge provide accurate results on single positions of the rod. We propose a contactless, optical measurment technique based on laser scanning which has the potential to be used inline during production to inspect all rods over the entire length. The method is based on evaluating the intensity signal of the reflected laser radiation against the scan angle. It is shown, that in combination with an accurate calibration this signal can be used to determine the rod’s deviation from a straight rod. We explain the measurement and calibration principle as well as data evaluation. We present the experimental setup and first measurement results on a single position on several samples. For a homogeneous sample surface and neglecting laser drift, accuracy and precision were determined to be in the range of 10 - 20 µm. We discuss the working principle of a potential inline system.

show abstract

An Enhanced Detection System of Drill Rod Bending Degree Based on Two-Dimensional Laser

Cited by 2 publications

References 15 publications

Laser scanning–based straightness measurement of precision bright steel rods at one point

Laser scanning–based straightness measurement of precision bright steel rods at one point

Laser scanning based straightness measurement of precision bright steel rods

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