Electromagnetic seismic pull testing machine and seismic method

The electromagnetic anti-seismic pull-out testing machine utilizes permanent magnets and a reverse current control module to actively suppress the vibration of the pull-out testing machine by adjusting the current value in real time. This solves the problems of long vibration period and resonance in traditional spring anti-seismic structures, achieving a highly efficient and stable anti-seismic effect.

CN120668474BActive Publication Date: 2026-07-24WUXI DONGYI MFG TECH CO LTD
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Patent Information

Application Number
CN202510934458.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-07-08
Publication Date
2026-07-24
Estimated Expiration
2045-07-08

AI Technical Summary

Technical Problem

Existing pull-out testing machines vibrate violently due to the impact force when the steel bar is pulled out. Traditional spring-based anti-vibration structures have long vibration periods, which can easily cause resonance, affecting the accuracy and lifespan of the equipment. Furthermore, they cannot effectively resist high-frequency or large-load impacts.

Method used

An electromagnetic anti-vibration pull-out testing machine is adopted. The piston rod of the hydraulic cylinder has a built-in permanent magnet. The reverse Ampere force generated by the induced current of the second coil actively suppresses the vibration of the piston rod. Combined with the reverse current control module, the current value is adjusted in real time to form a closed loop control.

Benefits of technology

It effectively shortens vibration decay time, reduces vibration amplitude, improves equipment stability and accuracy, extends service life, and efficiently suppresses vibration to adapt to different impact loads.

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Abstract

The application discloses an electromagnetic anti-vibration drawing testing machine and an anti-vibration method. The drawing testing machine comprises a machine table, an oil cylinder, a sliding table, an upper clamping jaw, a lower clamping jaw, a first coil, a second coil and a reverse current control module. A permanent magnet is arranged in the piston rod of the oil cylinder. When the steel bar is pulled off, the piston rod is impacted and vibrates, and the piston rod moves axially in the second coil. The second coil cuts the magnetic induction lines and generates induced current. The induced current can be used as an indirect index of the impact force. The first coil is electrified to generate corresponding reverse amperes, so that the anti-vibration can be achieved instantaneously, and the piston rod will not vibrate reversely due to excessive reverse force. The reverse current control module can monitor the current value in the second coil in real time, and change the reverse current required by the first coil according to the latest detected instantaneous maximum current value, so as to form a closed loop of "vibration detection-force feedback-dynamic adjustment".
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