Vision measuring technology for the position degree of a hole group

Siyuan Liu; Yupeng Ge; Shun Wang; Jialong He; Ying Kou; Haojing Bao; Qingchang Tan; Nian Li

doi:10.1364/AO.470907

Applied Optics
Vol. 62,
Issue 4,
pp. 869-879
(2023)
•https://doi.org/10.1364/AO.470907

Vision measuring technology for the position degree of a hole group

Siyuan Liu, Yupeng Ge, Shun Wang, Jialong He, Ying Kou, Haojing Bao, Qingchang Tan, and Nian Li

Not Accessible

Your library or personal account may give you access

Get PDF
Email
Share
Get Citation
Copy Citation Text
Siyuan Liu, Yupeng Ge, Shun Wang, Jialong He, Ying Kou, Haojing Bao, Qingchang Tan, and Nian Li, "Vision measuring technology for the position degree of a hole group," Appl. Opt. 62, 869-879 (2023)

Export Citation
- BibTex
- Endnote (RIS)
- HTML
- Plain Text
Citation alert
Save article

Check for updates

Abstract

The hole is one of the most important geometric elements in mechanical parts. The center distance of a hole group measurement method based on machine vision is proposed for solving the influence of perspective distortion and improving the applicability of vision systems. In the method, the plane equation of the measured plane is obtained by the line structured light vision technology, and the process is free from the constraints of the calibration plate. In order to eliminate the effect of projection distortion on the measurement accuracy, a local coordinate system is established on the plane of the measured hole group, the hole diameter, and the center distance of the hole group, which could be calculated by the local coordinates of the hole edge points. In the experiment, the flange is taken as the measured object, the distances between the holes on the flange are obtained by the method proposed in this paper, and the measurement results compared with the data are obtained by a coordinate measuring machine (CMM). The experimental results show that the average measurement error of center distance is 0.0739 mm, and the standard deviation is 0.0489 mm.

Full Article | PDF Article

More Like This

High precision measurement for the chamfered hole radius and spacing of a large-size workpiece based on binocular vision combined with plane dynamic adjustment

Junhui Huang, Miaowei Qi, Zhao Wang, Chao Xing, and Jianmin Gao
Appl. Opt. 60(29) 9232-9240 (2021)

Research on calibration of a binocular stereo-vision imaging system based on the artificial neural network

FangFang Han, YongXin Bian, Bin Liu, Qi Zeng, and YiFan Tian
J. Opt. Soc. Am. A 40(2) 337-354 (2023)

High-precision single-axis rotation measurement method of multi-rudders based on monocular vision

Junwei Sha, Junqi Lei, Guili Xu, and Yongqiang Ye
Appl. Opt. 62(12) 3208-3214 (2023)

Previous Article Next Article

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (12)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (30)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Camera	Model: MER-125-30UM
	Light-Sensitive Chips	Photoreceptor Cell	Highest Resolution	High Frame Frequency	Overall Dimensions
	1/3 in.	$3.75 \times 3.75 µ m$	$1292 \times 964 p i x e l$	30 f/s	$29 \times 29 \times 29$
Optical lens	Model: Computer M2514-MP
	Focal Length	Aperture	Maximum Diameter to Focal Length Ratio	Working Temperature	Interface
	25 mm	F1.4-F16C	1:1.4	−20°C to 50°C	Type C
Calibration plate	Model: NANO CBC 75 mm-2.0
	Graphics	Precision	Image Dimensional Accuracy	Grid Size	Overall Dimensions
	Checkerboard	Level 1	$\pm 1 . 0 µ m$	$2.0 \times 2.0 m m$	$75 \times 75 \times 3.0 m m$
Back light	Model: CCS LFL-200
	Power Supply	Color	Light Emitting Area	Installation Dimensions	Overall Dimensions
	12 V/9.0 W	Red	$200 \times 180 m m$	$200 \times 212 m m$	$234 \times 222 m m$
Laser	Model: LH650-80-3
	Wavelength	Power	Exit Pupil Aperture	Color	Overall Dimensions
	650 mm	0–50 mW	$Φ 8 m m$	Red	$Φ 16 \times 45 m m$

	Center Coordinates
Hole Number	$x_{0}$	$y_{0}$	Diameter $Φ$
1#	53.8626	−16.6481	14.7832
2#	47.6544	29.4971	14.8323
3#	1.5856	23.5321	14.9710
4#	7.8251	−22.4857	14.8933
5#	27.8546	3.2049	19.3462

Hole Number	$θ$ /rad	$ρ$ /mm
1#	−0.6520	32.7194
2#	0.9253	32.9137
3#	2.4830	33.2153
4#	−2.2330	32.5759

	Tangential Error Calculation/rad			Radial Error Calculation/mm
Hole Number	Measured Value of $θ$	Theoretical Value of $θ$	Tangential Error $Δ_{α}$	Measured Value of $ρ$	Theoretical Value of $ρ$	Radial Error $f_{R}$
1#	0	0	0	32.7194	32.5	0.2194
2#	1.5773	1.5708	0.0065	32.9137	32.5	0.4137
3#	3.1350	3.1416	−0.0066	33.2153	32.5	0.7153
4#	4.7022	4.7124	−0.0102	32.5759	32.5	0.0759

Hole Number	Tangential Error $f_{α} / m m$	Radial Error $f_{R} / m m$	Position Error $f / m m$
1#	0	0.2194	0.4387
2#	0.2121	0.4137	0.9298
3#	−0.2137	0.7153	1.4931
4#	−0.3320	0.0759	0.6811

Distance between Hole Centers	Measured Values in This Paper	CMM Values	$Δ L$
$L_{1}$	46.5610	46.6592	0.0982
$L_{2}$	46.4534	46.3645	0.0889
$L_{3}$	46.4388	46.4375	0.0013
$L_{4}$	46.4060	46.2990	0.1070
Average			0.0739
Standard deviation			0.0489

Hole Number	Measured Values in This Paper	CMM Values	$Δ \emptyset$
1#	14.7832	14.4792	0.3040
2#	14.8323	14.5044	0.3279
3#	14.9710	14.4908	0.4802
4#	14.8933	14.4590	0.4343
5#	19.3462	19.2428	0.1034
Average			0.3300
Standard deviation			0.1462

Hole Number	Center Coordinates	Image 1	Image 2	Image 3	Image 4	Image 5	Standard Deviation
1#	$x_{0}$	53.8802	53.8712	53.8626	53.8650	53.8777	0.0077
1#	$y_{0}$	−16.6438	−16.6445	−16.6481	−16.6525	−16.6581	0.0059
2#	$x_{0}$	47.6862	47.6695	47.6544	47.6655	47.6782	0.0121
2#	$y_{0}$	29.5054	29.5030	29.4971	29.4840	29.4825	0.0106
3#	$x_{0}$	1.5933	1.5794	1.5826	1.5893	1.5973	0.0069
3#	$y_{0}$	23.5561	23.5416	23.5321	23.5177	23.5082	0.0190
4#	$x_{0}$	7.8258	7.8378	7.8251	7.8272	7.8466	0.0094
4#	$y_{0}$	−22.4643	−22.4842	−22.4857	−22.4910	−22.4883	0.0106
5#	$x_{0}$	27.8689	27.8605	27.8546	27.8625	27.8707	0.0065
5#	$y_{0}$	3.2265	3.2136	3.2049	3.1982	3.1997	0.0117

Step Number	Step Name	Elapsed Time
1	Calibration of internal parameter	7.246428 s
2	Calibration of structural light plane	0.521826 s
3	Calibration of measured plane	0.077353 s
4	Extraction of edge points of holes	0.360029 s
5	Obtain the hole group position degree	0.078718 s

Abstract

Data availability

Cited By

Figures (13)

Tables (12)

Equations (30)

Applied Optics