Multi-axis synchronous control and external trigger pulse acquisition method of ultrasonic C-scan system

By combining domestically produced motion control cards and servo drivers with external trigger pulse acquisition methods, the problem of multi-axis synchronous control and signal binding in automated ultrasonic non-destructive testing systems has been solved. This has enabled efficient multi-axis synchronous motion and ultrasonic signal binding, reducing costs and improving testing consistency.

CN121186207BActive Publication Date: 2026-03-03BEIHANG UNIV
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Patent Information

Application Number
CN202511706143.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-11-20
Publication Date
2026-03-03
Estimated Expiration
2045-11-20

AI Technical Summary

Technical Problem

Existing automated ultrasonic nondestructive testing systems face challenges in multi-axis synchronous control and position-ultrasonic signal binding, resulting in low testing efficiency and difficulty in ensuring the consistency of test results.

Method used

Using domestically produced motion control cards and servo drivers, 11-axis synchronous control is achieved through the gLink-Ⅱ communication bus. Combined with the external trigger pulse acquisition method, FIFO buffer instructions are edited using the C# programming language, and parametric segmentation and three-dimensional surface mapping are performed using the Open CASCADE open-source feature library to ensure that the ultrasonic probe is aligned with the surface normal, thereby realizing multi-axis synchronous motion and pulse output.

Benefits of technology

It achieves a reduction in accuracy and cost of multi-axis synchronous motion control, with a reduction of more than 50%, and realizes accurate binding of system position information and ultrasonic signals. It is suitable for synchronous motion control and external trigger pulse acquisition of 12-axis and below systems.

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Abstract

The application provides a multi-axis synchronous control and external trigger pulse acquisition method of an ultrasonic C scanning system, and belongs to the field of ultrasonic nondestructive testing. Aiming at the linkage problem of an 11-axis water jet transmission type ultrasonic C scanning detection equipment, a gLink-II communication bus is used to transmit a motion instruction, so that the synchronous motion control of the multi-axis system is realized. According to the numerical model of a part to be detected, the forward and inverse solutions of kinematics are solved, the displacement amounts / joint angles of each trajectory point of the 11 motion axes in the scanning trajectory are obtained, and the sound wave incidence end and the receiving end are ensured to reach the corresponding positions at the same time. Based on the interpolation instruction sequence execution logic of the FIFO buffer area of the motion control card, after each motion axis reaches the position, the external trigger pulse is obtained at the IO output port of the driver to excite the ultrasonic board card, so that the ultrasonic signal and the scanning position information are bound, and the ultrasonic C scanning imaging of the part to be detected is realized. The application is based on a domestic motion control card, and the synchronous motion control of the 11-axis water jet transmission type ultrasonic C scanning detection equipment and the excitation pulse acquisition of the ultrasonic board card are completed.
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Citation Information

Patent Citations

  • Multi-axial synchronous motion control system and control method thereof

    CN102999016A

  • Multi-axis synchronous control method for robot

    CN103116318A