Wireless Tyre Puncture Detection via Magnetic Inductance
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Solution Overview
Problem
Existing tire puncture detection systems using wired connections between embedded sensors and detection systems are prone to damage, leading to unreliable monitoring due to mechanical robustness issues, limited temperature range, and aging.
Innovation Solution
A tire puncture detection system utilizing a transformer configuration with a primary and secondary coil, where the coils are magnetically coupled but physically separated, eliminating the need for wire connections and using an inductance measuring circuit to detect changes in inductance caused by tire punctures, with conductive layers and an insulating layer for electrical isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired connections are used between embedded sensors and detection systems, then the system can detect tire punctures, but the system becomes prone to damage and unreliable due to mechanical robustness issues, limited temperature range, and aging
Solution Approach 1:
The patent replaces wired mechanical connections with wireless communication technology. The sensor node communicates puncture detection data to the central controller via wireless signals, eliminating physical wire connections that are susceptible to mechanical damage, oxidation, and temperature limitations. This substitution directly resolves the contradiction by maintaining detection functionality while removing the mechanical robustness weakness.
Solution Approach 2:
The patent introduces a wireless communication intermediary between the sensor and the detection system. Instead of direct wired connections, the sensor node uses wireless transmission as an intermediary medium to convey information to the central controller. This intermediary approach maintains system reliability while avoiding the mechanical vulnerabilities of direct wired connections.
2Reliability
If wired connections and embedded electronic devices are used in the tire, then the system can monitor tire conditions, but the system becomes unreliable due to damage to wires and contacts
Solution Approach 1:
The patent replaces the mechanical wire and contact system with a wireless electronic communication system. The sensor node contains electronics that communicate puncture status wirelessly to the central controller, eliminating wires and contacts that are vulnerable to damage and oxidation within the tire environment. This substitution directly addresses the harmful factors affecting wired systems.
Solution Approach 2:
The patent extracts and removes the wired connection components (wires and contacts) from the tire monitoring system. By eliminating these vulnerable elements entirely and replacing them with wireless communication, the system removes the source of wire damage and oxidation problems while maintaining the core monitoring functionality.
3Reliability
If a sensor with wired connections is embedded in the tire, then the system can detect punctures, but the system lacks robustness against mechanical damage and environmental factors
Solution Approach 1:
The patent replaces the wired sensor system with a wireless sensor node that has no physical connections to external components. The sensor node is self-contained with wireless transmission capability, eliminating the mechanical weak points where wires enter and connect to the tire structure. This substitution enhances adaptability to temperature variations and environmental factors while maintaining puncture detection reliability.
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 system provides a more robust and reliable tire puncture detection by avoiding physical contact issues, ensuring continuous operation across varying temperatures and reducing the risk of damage, thus enhancing the reliability of tire monitoring.
Implementation Method 1
The first coil is magnetically coupled to the second coil
Implementation Method 2
The inductance measuring circuit is coupled to the first coil and is configured to measure a change in the inductance of the first coil caused by a change in load or inductance of the second coil that is caused by a puncture in the tyre
Data Source
Figure 1a~1b
Figure 2~3
AI summary
A tyre puncture detection system (3) is provided that comprises a sensor (4) for integrating into the tyre (1), a sensing system (5) and an inductance measuring circuit (13). The sensor (4) comprises a first conductive layer (6), a second conductive layer (7) and an insulating layer (8) arranged in the tyre (1), the insulating layer (8) being arranged between and electrically isolating the first conductive layer (6) and the second conductive layer (7) from one another. The sensing system (5) comprises a transformer configuration having a primary winding and a secondary winding, wherein the primary winding is provided by a first coil (12) having a first inductance and the secondary winding is provided by a second coil (9) having a second inductance, the second coil (9) being connectable to the sensor (4) and being sized and shaped to be arranged on an inner surface of the tyre. The first coil (12) is magnetically coupled to the second coil (9). The inductance measuring circuit (13) is coupled to the second coil (12). The inductance measuring circuit (13) is configured to measure a change in the inductance of the first coil (12) caused by a change in an inductance of the second coil (9) that is caused by a puncture in the tyre (1).