Tooling Possession Safeguards and Asset Tagging in China Factories
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Subsurface RFID Transponders
Meaning
Radio frequency identification components are specifically engineered to transmit data through solid layers of soil, concrete, or plastic. Deploying subsurface rfid transponders allows for the tracking of items that are buried or embedded within other structures. These units must operate without a direct line of sight to the reader.
Signal Penetration
Low frequency waves are typically used to ensure the message can pass through dense materials without excessive attenuation. Because subsurface rfid transponders use induction rather than high frequency radiation, they are less affected by moisture in the surrounding environment. The range is limited but the connection is stable.
Passive designs do not require an internal battery and rely on the energy from the reader antenna.
Durability Requirement
Enclosures for these devices must withstand high pressure and chemical exposure over long periods. A typical subsurface rfid transponders housing is made from epoxy or specialized polymers that prevent the ingress of water. Physical protection is necessary to survive the mechanical stress of burial or casting.
Asset Management
Utility companies use these markers to identify the location of underground pipes and cables. When a technician passes a reader over the ground, the subsurface rfid transponders send back an identification code and depth information. This prevents accidental damage during excavation projects.
Proper mapping of these transponders ensures the longevity of underground infrastructure.