A novel laser straightness measurement method with beam bend compensation

You, Fengling; Zhang, Bin; Feng, Qibo

doi:10.1016/j.ijleo.2010.09.038

Cited by 9 publications

(3 citation statements)

References 1 publication

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“…However, we noticed that beam radii can affect measurement accuracies remarkably; a decrease of beam radii can improve measurement accuracies and sensitivities in a system [11]. Such new findings were also predicted by some theoretical models [12]. Despite this, we found an increase of laser beam radii leads to a decrease of beam drifts, which leads to a reduction of measurement errors.…”

Section: Introductionsupporting

confidence: 68%

Influence of beam radii on a common-path compensation method for laser beam drifts in laser collimation systems

Zhao¹,

Feng²,

Zhang³

et al. 2016

Meas. Sci. Technol.

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The laser beam drift is a main factor that influences laser collimation measurement accuracies. In such measurements, the common-path compensation method is an efficient way to eliminate errors which are normally produced by the laser beam drift. Based on our current common-path compensation system, compensations for the laser beam drift were studied by different laser beam radii and detectors. The measurements have shown that the compensation effect for 3 mm beam radius is better than the ones of 1.5 mm and 4.0 mm beam radii. Based on this, the ratio between the 3 mm beam radius and the total area of the quadrant detector, which is 36%, has indicated the best compensation effect.

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Section: Introductionsupporting

confidence: 68%

Influence of beam radii on a common-path compensation method for laser beam drifts in laser collimation systems

Zhao¹,

Feng²,

Zhang³

et al. 2016

Meas. Sci. Technol.

Self Cite

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“…In the most demanding applications, the non-perfect straightness of the laser beam must be considered. Air turbulences affect the stability of the beam with a random contribution which can be reduced by averaging, while the bending of the beam due to an orthogonal gradient of the air refractivity must be carefully evaluated and corrected [ 15 ]. An alternative approach worth mentioning is based on the analysis of the transverse accelerations measured when the axis is moving at constant speed [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Modulation-Based Straightness Measurement

Egidi

Balsamo

Corona

et al. 2023

Sensors

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The concept of a novel non-contacting technique for measuring straightness and its practical realization in a mechanical device are presented in this article. The device, called InPlanT, is based on the acquisition of the luminous signal retroreflected by a spherical glass target and impinged on a photodiode after mechanical modulation. The received signal is reduced to the sought straightness profile using dedicated software. The system was characterized with a high-accuracy CMM and the maximum error of indication was derived.

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“…At present, scholars at home and abroad have made great researches on straightness and flatness. You et al [2] presented a method for measuring straightness error of beam bending compensation based on finite element thermal analysis. Zhou et al [3] used the line-structured light vision method to realize the contour reconstruction of the rail.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Reconstructing Flatness Error Contour of Long Surface Based on a Laser Displacement Sensor

Zhong-wu

Zhao

2019

IEEE Access

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In order to solve the problem that the flatness error contour curve of the guideway mounting surface on machine tools can not be intuitive description, a novel method is proposed in this paper. The principle is to divide the measured surface with a certain length into several short surfaces with overlapping region, and the segmented surfaces are measured respectively, then the flatness error contours of the segmented surfaces can be obtained, finally, the segmented flatness error contours are spliced together to reconstruct the flatness error contour of the entire surface. On this basis, the detection instrument is designed, the detection principle is given, the benchmark plate is customized to identify the starting position and ending position of measurement, the reference surface and the measured surface are measured respectively in combination with the detection instrument and the benchmark plate. Then, an algorithm is developed to convert the distance difference between the reference surface and the measured surface into the flatness error contours of segmented surfaces. Next, using the geometric relationship between overlapping region of segmented flatness error contours, an algorithm is studied which can splice these segmented flatness error contours and reconstruct the flatness error contour of the entire surface. Meanwhile, mathematical models of the algorithms are established, and the measurement experiment is carried out. The results demonstrate that this method can reconstruct the flatness error contour of long surface accurately. INDEX TERMS Flatness detection, machine tool, detection instrument, flatness error contour reconstruction, contour splicing.

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A novel laser straightness measurement method with beam bend compensation

Cited by 9 publications

References 1 publication

Influence of beam radii on a common-path compensation method for laser beam drifts in laser collimation systems

Influence of beam radii on a common-path compensation method for laser beam drifts in laser collimation systems

Investigation on Modulation-Based Straightness Measurement

A Novel Method for Reconstructing Flatness Error Contour of Long Surface Based on a Laser Displacement Sensor

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