Synthetic Lifting Rope Damage Detection Using CNN Vision
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Solution Overview
Problem
There is a need for more reliable and alternative methods for detecting damage in synthetic lifting ropes, as existing methods for steel lifting ropes are often unsuitable for synthetic ones.
Innovation Solution
A method involving winding a synthetic lifting rope, obtaining photographic images, and using a convolution neural network for real-time visual damage detection, with pre-processing techniques like histogram equalization and resolution reduction, and training the network with an Adam optimizer and categorical cross-entropy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic detection, radiation testing, or eddy current inspection methods are used, then damage detection capability is improved, but these methods become unsuitable for synthetic lifting ropes
Solution Approach 1:
The patent replaces electromagnetic and radiation-based detection methods with optical imaging and computer vision technology. Instead of using electromagnetic fields or radiation to detect damage, the system uses cameras to capture images of the rope surface and processes these images through neural networks to identify damage, making the detection method compatible with synthetic materials.
Solution Approach 2:
The patent changes the detection parameters from electromagnetic properties to visual/optical properties. By shifting from detecting electromagnetic responses to analyzing visual characteristics like color, texture, and pattern changes in the rope surface, the system becomes applicable to synthetic ropes while maintaining damage detection capability.
2Measurement precision
If high-resolution photographic images are used for damage detection, then detection accuracy is improved, but computational complexity and memory requirements increase
Solution Approach 1:
The patent performs preliminary actions by pre-processing images before they are fed into the neural network. This includes resizing images to standardized dimensions, normalizing pixel values, and applying data augmentation techniques during the training phase. These preliminary steps prepare the data in advance, reducing the computational burden during real-time inference while maintaining detection accuracy.
Solution Approach 2:
The patent applies partial action by selectively processing only the most relevant features of the images. The neural network is trained to focus on specific visual indicators of damage rather than processing every pixel equally, and the system may discard less important image data after initial processing, reducing computational requirements while retaining essential detection capabilities.
Data Source
AI summary
A method, apparatus, and system for real-time visual damage detection of a synthetic lifting rope, including winding (701) in or out a synthetic lifting rope by a crane; obtaining (702) a stream of photographic images of the rope while wound in or out by the crane; and detecting (703) damages in the rope using a convolution neural network CNN. Training of the CNN includes winding (704) in or out the rope under a tensile load; obtaining (705) a stream of photographic images of the rope while wound in or out under the tensile load; obtaining (706) two classified sets formed using the images comprising a first set of images classified as good, and a second set of images classified as not good: pre-processing (707) the images of the two sets; and feeding (708) the pre-processed images to the CNN.


