Textile Core Antenna for Tyre RF Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radio frequency transmission and reception devices integrated into pneumatic casings face fragility issues due to thermo-mechanical stresses, particularly during integration and handling, leading to potential separation of electrical connections and device malfunction.
Innovation Solution
A pneumatic envelope with a toroidal shape and carcass reinforcement, incorporating a radio frequency transmission-reception device featuring a chip with grooves for antenna wires and a dipole antenna made of a textile wire with a conductive ribbon wound around it, providing mechanical strength and flexibility to withstand stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antenna wires with circular section are used and soldered to chip pads, then electrical connection is achieved, but the connection remains fragile under tensile, torsional, or shearing forces
Solution Approach 1:
The patent uses a composite antenna wire structure combining a textile core (polyester or aramid fibers) with a metal coating layer (copper, aluminum, or their alloys). This composite structure provides both the flexibility of textile materials and the electrical conductivity and mechanical strength of metals, resolving the contradiction between connection reliability and mechanical strength.
Solution Approach 2:
The patent changes the geometric parameters of the antenna wire by applying a metal coating layer with specific thickness (5-50 micrometers) onto the textile core. This parameter modification enhances the mechanical strength and electrical conductivity while maintaining the flexibility of the original textile structure, thereby improving connection reliability under various forces.
2Reliability
If the radiofrequency device is integrated into the pneumatic casing, then functionality is achieved, but the device must withstand strong thermomechanical stresses during integration and operation
Solution Approach 1:
The textile-core antenna wire with metal coating resists thermomechanical stresses during pneumatic casing integration and operation. The textile core provides thermal stability and flexibility, while the metal coating maintains electrical conductivity under stress, ensuring device functionality in harsh environments.
Solution Approach 2:
The textile core acts as a flexible structural element that can accommodate the deformation and stress experienced during integration into the pneumatic casing. This flexibility allows the antenna wire to withstand thermomechanical stresses without compromising the device's functionality.
3Ease of manufacture
If the antenna wire diameter is between 50 and 200 microns to fit into chip grooves, then integration is possible, but the wire remains vulnerable to detachment under applied forces
Solution Approach 1:
The composite structure of textile core with metal coating maintains the suitable diameter (50-200 microns) for groove integration while significantly enhancing connection stability. The metal coating provides adhesion strength and structural integrity, preventing detachment under applied forces during and after integration.
4Strength
If a chain of RF devices is wrapped around a textile core thread, then mechanical robustness is improved, but the wrapping operation becomes delicate and requires careful handling to avoid connection detachment
Solution Approach 1:
The patent integrates the antenna wire directly into the textile core during manufacturing, creating a unified composite structure. This eliminates the need for separate wrapping operations and reduces manufacturing complexity while maintaining mechanical robustness. The direct integration ensures connections are made before the textile structure is finalized, avoiding subsequent handling issues.
Data Source
Figure 1a~1b
Figure 1c~2b
Figure 2c~2d
AI summary
The invention relates to a pneumatic casing (100) comprising a top block (82) and two side blocks, the top block (82) having two axial ends (821), and a side block joining an axial end to a bead (84) via a flank (83). According to the invention, at least one of the side blocks of the pneumatic casing (100) comprises a radio frequency transmit-receive device (D) comprising a dipole antenna including a textile thread and at least one ribbon made of an electrically conductive material, the ribbon being wound in turns around the textile thread to cover it at least partially.