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Volume 45 Issue 4
Aug.  2025
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Article Navigation >  Diamond & Abrasives Engineering  > 2025  >  45(4): 542-550
TIAN Chunyue, DING Junfei, LI Wenhui, LI Xiuhong, YANG Shengqiang. Dual camera testing method for 3D velocity field of rolling and grinding blocks[J]. Diamond & Abrasives Engineering, 2025, 45(4): 542-550. doi: 10.13394/j.cnki.jgszz.2024.0014
Citation: TIAN Chunyue, DING Junfei, LI Wenhui, LI Xiuhong, YANG Shengqiang. Dual camera testing method for 3D velocity field of rolling and grinding blocks[J]. Diamond & Abrasives Engineering, 2025, 45(4): 542-550. doi: 10.13394/j.cnki.jgszz.2024.0014
shu

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

doi: 10.13394/j.cnki.jgszz.2024.0014
  • 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

More Information
  • Received Date: 2024-01-18
  • Accepted Date: 2024-10-10
  • Rev Recd Date: 2024-08-16
    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.

     

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