滚抛磨块三维速度场的双相机测试方法

田春越; 丁俊飞; 李文辉; 李秀红; 杨胜强

doi:10.13394/j.cnki.jgszz.2024.0014

滚抛磨块三维速度场的双相机测试方法

doi: 10.13394/j.cnki.jgszz.2024.0014

田春越^{1, 3},
丁俊飞^2,,
李文辉^{2, 3, 4, ,},
李秀红^{1, 3},
杨胜强^{1, 3}

1.
太原理工大学机械与运载工程学院, 太原 030024
2.
太原理工大学航空航天学院, 山西晋中 030600
3.
太原理工大学, 精密加工山西省重点实验室, 太原 030024
4.
天津科技大学机械工程学院, 天津 300457

基金项目: 国家自然科学基金（51975399，52075362， 51875389）；中央引导地方科技发展资金（YDZJSX2022A020，YDZJSX2022B004）。

详细信息

作者简介:
丁俊飞，男，1992年生，讲师。主要研究方向：单相层析三维流场测试技术、旋翼类无人机设计及飞控系统、先进工业三维视觉测量/检测技术。E-mail：dingjunfei@tyut.edu.cn

通讯作者:
李文辉，男，1975年生，教授。主要研究方向：高性能零件形性协同制造。E-mail：wenhui_li7190@126.com

中图分类号: TG74; TG58; TP391
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- 文章访问数: 39
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- 被引次数: 0
出版历程
- 收稿日期: 2024-01-18
- 修回日期: 2024-08-16
- 录用日期: 2024-10-10
- 刊出日期: 2025-08-20

Dual camera testing method for 3D velocity field of rolling and grinding blocks

TIAN Chunyue^{1, 3},
DING Junfei^2
,,
LI Wenhui^{2, 3, 4
, ,},
LI Xiuhong^{1, 3},
YANG Shengqiang^{1, 3}

1.
College of Mechanical and Transportation Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.
College of Aeronautics and Astronautics, Taiyuan University of Technology, Jinzhong 030600, Shanxi, China
3.
Key Laboratory of Precision Machining in Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
4.
College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300457, China

摘要

摘要: 滚抛磨块的运动速度是影响滚磨光整加工效果的重要因素。为解决滚抛磨块流场速度测试中存在的无法直接获得速度、测试过程对流场存在干扰、只能实现单点测试等问题，提出滚抛磨块三维速度场的双相机测试方法。搭建滚抛磨块三维速度场测试系统，通过位移测试实验验证测试系统的准确性与稳定性，并对立式振动滚磨光整加工设备进行滚抛磨块三维速度场测试实验。结果表明：位移实验测得的位移值与实际施加的位移值基本一致，X方向位移平均误差的绝对值＜0.10 mm，Z方向位移平均误差的绝对值＜0.15 mm，且测得的滚抛磨块三维速度场运动规律与实际规律基本一致。
- 滚磨光整加工 /
- 滚抛磨块 /
- 双相机测速 /
- 流场三维速度
Abstract: Objectives The motion speed of the rolling and polishing block is one of the key factors affecting the overall machining effect of rolling polishing. However, the traditional method for measuring the flow velocity of rolling and polishing blocks has many shortcomings, especially in terms of testing accuracy and efficiency. The traditional method often cannot directly obtain velocity data and is limited by single-point testing, which cannot comprehensively and dynamically reflect the motion trajectory of the rolling and polishing block flow field. In addition, the interference of the measurement process with the flow field of the rolling and polishing block is also a factor that cannot be ignored in the testing process of the traditional method, and it significantly affects the accuracy of the test results. Therefore, a dual-camera testing method for the three-dimensional velocity field of the rolling and polishing block is proposed, aiming to achieve accurate measurement of the motion velocity of the rolling polishing block through this method and further improve the effect and accuracy of rolling polishing machining. Methods Two Dushen industrial cameras are used to synchronously capture motion images of the rolling polishing block from different perspectives, and then the motion trajectory of the rolling polishing block in three-dimensional space is constructed using disparity calculation and feature point tracking algorithms. The specific process is as follows: First, the position changes of the surface feature points of the rolling grinding block are extracted through the image matching algorithm. Then, by using the calibration parameters of the camera (including internal parameters, external parameters, and distortion coefficients), the two-dimensional image coordinates are mapped to the three-dimensional coordinate system to complete the calculation of the velocity vector. Next, a three-dimensional velocity field test system for the rolling and polishing grinding block are established, and the accuracy and stability of the system are be verified through displacement test experiments. The three-dimensional velocity field test of the vertical vibration roller grinding and finishing processing equipment is conducted on the roller grinding blocks to verify its application feasibility and stability in actual processing, and to further evaluate its performance and advantages in roller grinding and finishing processing. Results The displacement test results show that the displacement values measured by the testing system are very close to the actual applied displacement values. In the X direction, the absolute value of the average measurement error is less than 0.10 mm. In the Z direction, the absolute value of the average measurement error is less than 0.15 mm. The three-dimensional velocity field test experiment of the rolling polishing block reveals the motion law of the flow field of the rolling polishing block. The measured three-dimensional velocity field of the rolling polishing block is basically consistent with its actual motion law, verifying the effectiveness and accuracy of this testing method in measuring the velocity of the rolling polishing block. Moreover, it can accurately capture the motion trajectory without interfering with the flow field, providing reliable motion analysis data for the grinding and finishing process. Conclusions The proposed dual camera testing method for the three-dimensional velocity field of rolling polishing blocks provides a new technical approach for measuring the three-dimensional velocity field of rolling polishing blocks. This method can accurately and stably obtain the three-dimensional velocity field of rolling polishing blocks and reveal their motion laws, providing an effective tool for further optimizing the rolling polishing process. This testing system is expected to play a greater role in high-precision motion analysis and machining optimization, providing assistance for other similar complex flow field tests.
- rolling and polishing processing /
- rolling and polishing block /
- dual camera speed measurement /
- 3D velocity of the flow field

HTML全文

图 1 工作原理

Figure 1. Working principle

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图 2 滚抛磨块三维速度场测试系统

Figure 2. 3D velocity field testing system for rolling and grinding blocks

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图 3 算法流程图

Figure 3. Algorithm flow chart

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图 4 位移测试实验装置图

Figure 4. Diagram of displacement testing experimental setup

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图 5 双相机采集的棋盘格标定板

Figure 5. Checkerboard calibration board for dual camera acquisition

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图 6 灰度处理

Figure 6. Grayscale processing

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图 7 高斯滤波

Figure 7. Gaussian filtering

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图 8 位移测试实验结果

Figure 8. Experimental results of displacement testing

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图 9 三维速度场测试实验装置

Figure 9. Experimental setup of 3D velocity field text

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图 10 测量区域

Figure 10. Measurement area

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图 11 实际测量得到的二维速度场示意图

Figure 11. Schematic diagram of two-dimensional velocity field obtained from actual measurements

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图 12 实际测量得到的三维速度场示意图

Figure 12. Schematic diagram of three-dimensional velocity field obtained from actual measurements

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图 13 滚抛磨块流场运动规律^[28]

Figure 13. Flow field motion law of rolling grinding block^[28]

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