Earplug Cord Metal-Magnetic Particle Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing earplugs and cords used in noise protection can fall and go undetected in contamination-sensitive processes, posing risks if made of metal, and current detection methods using metal pieces may cause harm or fail to detect the earplugs or cords effectively.
Innovation Solution
Incorporating small, embedded metal-magnetic particles in a flexible polymer core within the earplugs and cords, with a covering devoid of these particles, to enable detection by metal and magnetic detectors without using large metal pieces, ensuring safety and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large metal pieces are embedded in earplugs for detection, then detection reliability is improved, but the risk of harm to people and machinery increases
Solution Approach 1:
The patent divides the detection function into multiple small metal particles distributed throughout the earplug and cord, rather than using a single large metal piece. This segmentation maintains detection reliability while reducing the harm potential of any individual particle
Solution Approach 2:
The patent changes the physical parameters of the metal component from large size to small particle size (less than 0.1 cubic millimeter). This parameter change enables detection by metal and magnetic detectors while minimizing the harmful effects of ingestion or contact with machinery
2Measurement precision
If iron alloy particles are used for detection, then detection sensitivity is improved, but skin marking occurs
Solution Approach 1:
The patent applies local quality by creating a core-shell structure where the core contains iron alloy particles for detection and the outer covering is particle-free to prevent skin marking. This allows different regions of the same object to have different properties
Solution Approach 2:
The patent introduces a polymer covering as an intermediary layer between the iron alloy particles and the skin. This covering prevents direct contact between particles and skin, eliminating the skin marking effect while preserving the detection capability of the particles
3Reliability
If earplugs and cords are made detectable, then safety in contamination-sensitive processes is improved, but device complexity increases
Solution Approach 1:
The patent merges the detection function into the existing earplug and cord structure by embedding particles within the polymer matrix. This integration approach maintains simplicity while achieving detectability, rather than adding separate detection components
Solution Approach 2:
The patent creates composite materials by combining polymer with small metal-magnetic particles. This composite structure provides both the functional properties of the polymer and the detection properties of the metal particles, achieving safety without significant complexity increase
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
The solution allows for reliable detection of earplugs and cords by metal and magnetic detectors, minimizing the risk of harm to people and machinery while maintaining a moderate cost and avoiding skin marking or damage.
Implementation Method 1
the particles can be readily detected by metal and/or magnetic detectors
Implementation Method 2
detectable by metal and/or magnetic detectors
Data Source
AI summary
Earplugs (22, 24) and a combination (20) of a pair earplugs and a cord (26) that joins them, each can be detected by metal and/or magnetic detectors even if the parts of the combination becomes separated and fall into a batch of food, etc. Each earplug includes an earplug core (32) formed of a first elastomer with a multiplicity of metal-mag detectable particles (36) (particles detectable by electrical or magnetic detectors) embedded in the first elastomer, and an earplug covering (32) of a second elastomer (that may be the same as the first one) that is devoid of such particles. The cord includes a cord core (50) formed of a first flexible polymer with metal-mag detectable particles embedded therein, and a cord covering (54) formed of a second polymer that is devoid of such particles. The particles are preferably of iron, which is magnetically detectable but that can mark skin or clothing that it contacts, but which is isolated from the skin and clothing by the earplug and cord coverings. The earplug covering can be molded and then filed with the earplug core. The cord core can be extruded and the covering extruded around the core.