Compact Wire Rope Damage Diagnostic Apparatus
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Solution Overview
Problem
Conventional wire rope magnetostrictive sensor probes are large and time-consuming to mount, and cannot be easily applied to multiple wire ropes in close proximity, such as in elevator systems, due to their circumferential design.
Innovation Solution
A compact rope damage diagnostic testing apparatus that applies ultrasonic waves using a magnet and excitation coil, with the excitation coil and detecting element disposed in a parallelogram configuration to detect damage along the outer circumference of the wire rope, allowing for faster mounting and detection without encircling the entire rope.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the probe surrounds the entire circumference of the wire rope to detect abnormalities around the entire circumference, then the detection coverage is improved, but the mounting time and overall size of the probe increase
Solution Approach 1:
The invention extracts only the necessary detection function from the conventional circumferential probe design. By using a single-strand detection approach that targets specific outer layer strands, the probe achieves adequate detection coverage without needing to surround the entire wire rope circumference, thereby reducing mounting time and probe size.
Solution Approach 2:
The invention applies partial action by detecting only the outer layer strands that are most susceptible to damage and provide sufficient diagnostic information. This partial detection approach (focusing on outer layer strands rather than all strands) achieves acceptable reliability while significantly reducing the probe's complexity and mounting time.
2Reliability
If the probe surrounds the entire circumference of the wire rope, then the detection coverage is improved, but the overall size of the probe becomes large and cannot be mounted when wire ropes are disposed in close proximity
Solution Approach 1:
The invention extracts the essential detection capability from the bulky circumferential probe design. By implementing a compact probe that detects only outer layer strands through a localized approach, it achieves sufficient detection coverage without requiring the large volume of a full circumferential probe, enabling mounting in close-proximity wire rope configurations.
Solution Approach 2:
The invention uses partial detection of only outer layer strands rather than comprehensive circumferential detection. This partial action reduces the required probe volume while maintaining adequate detection coverage for the most critical damage-prone areas of the wire rope.
3Measurement precision
If the probe surrounds the entire circumference of the wire rope, then the detection accuracy is improved, but the device complexity and mounting difficulty increase
Solution Approach 1:
The invention extracts the core detection function from the complex circumferential probe system. By implementing a simplified probe that uses magnetostrictive sensing on outer layer strands only, it reduces device complexity while maintaining detection accuracy for the most critical damage locations.
Solution Approach 2:
The invention applies partial detection focusing on outer layer strands, which are most susceptible to damage and provide sufficient diagnostic information. This approach reduces probe complexity compared to comprehensive circumferential detection while maintaining adequate measurement precision for damage detection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient detection of wire rope damage using a compact configuration, allowing for quick mounting and operation even in close proximity to multiple wire ropes, improving detection speed and reducing the overall size of the apparatus.
Implementation Method 1
an ultrasound applicator that includes: a magnet that applies a direct current magnetic field to the wire rope; and an excitation coil that applies an alternating-current magnetic field to the wire rope, the ultrasound applicator generating ultrasonic waves in the wire rope by making the wire rope vibrate due to magnetostriction effect
Implementation Method 2
Reflected ultrasound waves due to damage to the wire rope are detected by the coil assembly through reverse magnetostriction effect in the magnetostrictive strip
Data Source
AI summary
In a rope damage diagnostic testing apparatus, an ultrasound applicator generates ultrasonic waves in a wire rope by making the wire rope vibrate due to magnetostriction effect. A detecting element detects changes in a state of propagation of the ultrasonic waves in the wire rope. An excitation coil and the detecting element are disposed in a parallelogram that has as a first opposite side length a length of a portion of the wire rope in which one of the outer layer strands makes one revolution around the wire rope, and that has as a second opposite side length a product of a diameter and number of the outer layer wires that are included in one of the outer layer strands.