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Analysis of the principle of broken wire judgment in non-destructive testing technology of steel wire rope
Release time:
2025-04-03
In the field of wire rope safety inspection, the accuracy of broken wire (LF) identification is an important technical parameter for measuring equipment performance. This article analyzes the implementation methods and current technological development status of broken wire detection based on industry-wide common technical principles.
Technical Background: In the field of steel wire rope safety inspection, the accuracy of broken wire (LF) identification is a key technical parameter for evaluating equipment performance. This article analyzes the implementation methods and current technical development status of broken wire detection based on industry-standard technical principles.
I. Two-Dimensional Signal Synergistic Detection Principle
Equipment using strong magnetic detection technology typically achieves broken wire analysis through the following methods:
- LF Positioning Module : Records the magnetic flux change signal generated by broken wires to achieve axial position location
- LMA Loss Quantification : Monitors changes in the metal cross-sectional area and uses a specific algorithm to assess the degree of damage
- Compound Judgment Mechanism : When a spatial correlation occurs between the LF signal waveform and LMA fluctuation, the system will prompt a potential broken wire risk
II. Explanation of Factors Affecting Detection Accuracy
According to publicly available research data, the following situations may affect the accuracy of the detection results:
- Dense Broken Wire Scenarios : When the number of broken wires in the same section exceeds 4, signal superposition may lead to quantification errors
- Inner and Outer Broken Wire Distinction : Currently, industry-standard technology cannot directly determine the positional attributes of broken wires
- Interference Signal Identification : Rust, oil stains, and other attachments may affect signal acquisition
It is recommended that when continuous abnormal signals are detected, manual review should be combined to confirm the specific damage type.
III. Technical Application Specification Reference
The development of detection equipment should refer to the following standard requirements:
- ISO 4309 Crane Wire Rope Inspection Standard
- GB/T 21837 Magnetic Detection Method for Metal Components
- Relevant clauses of special equipment safety technical specifications
According to materials science research, the incidence of external broken wires in steel wire ropes is generally higher than that of internal broken wires, but multi-layer non-rotating steel wire ropes need to pay special attention to the risk of internal damage. Some detection equipment can assist in judging the damage location characteristics through the difference in signal waveform characteristics.
Note: This article is only for technical principle exchange; the specific performance parameters of the equipment shall be subject to the actual detection data. If wire rope damage is found during the detection process, contact a professional organization for safety assessment in time.
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