Linear Polarization Antenna for Dynamic Tire Transponder Reading
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Solution Overview
Problem
Existing systems for dynamic reading of tire transponder data face challenges in robust data reading, particularly at high vehicle speeds and specific relative positions between the system and transponder, leading to unreliable identification of tire serial numbers.
Innovation Solution
A system utilizing linear-polarization antennas with a vertical electric field, paired with a reader, which offers a 3 dB gain in reading power and minimizes wave reverberation, ensuring robust data reading by using two offset antennas to ensure continuous communication over a meter-long distance at speeds up to 60 km/h, and alternating antenna operation to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a circular-polarisation antenna is used for dynamic reading of tire transponder data, then the system can operate at various orientations, but the reading power is reduced by 3 dB when aligned with the transponder antenna
Solution Approach 1:
The patent changes the polarization parameter from circular to linear with vertical electric field orientation. This parameter change provides a 3 dB gain in reading power when the antenna is aligned with the transponder antenna, while the vertical orientation maintains sufficient adaptability for dynamic reading scenarios.
2Power
If a linear-polarization antenna with vertical electric field is used, then reading power gains 3 dB when aligned with transponder antenna, but reading becomes unreliable at certain relative positions and high speeds
Solution Approach 1:
The patent divides the antenna system into multiple linear-polarization antennas with vertical electric fields positioned at different locations. This segmentation ensures that at least one antenna maintains reliable alignment with the transponder antenna during dynamic conditions, compensating for the limited orientation adaptability of individual linear-polarization antennas.
3Length of stationary object
If the antenna gain is increased to improve reading distance, then the radiated power exceeds international standards, but reducing gain limits communication distance
Solution Approach 1:
The patent employs multiple antennas that can be dynamically activated based on the relative position and speed of the tire. This dynamic operation allows the system to maintain effective communication distance by switching between antennas rather than continuously increasing the gain of a single antenna, thereby staying within radiated power standards.
4Reliability
If two antennas are operated simultaneously to ensure continuous communication, then interference occurs between antennas, but operating one at a time reduces productivity
Solution Approach 1:
The patent implements periodic switching between multiple linear-polarization antennas with vertical electric fields. The switching timing is coordinated to ensure continuous coverage and prevent interference, maintaining both reliable communication and operational efficiency by activating only one antenna at a time in a periodic sequence.
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 significantly enhances the robustness of tire transponder data reading, ensuring reliable identification with multiple ideal reading positions and compliance with international radiated power standards, allowing continuous data communication and interference-free operation.
Implementation Method 1
the antenna is a linear-polarization antenna with a vertical electric field
Implementation Method 2
at least one antenna able to receive data transmitted by the transponder
Implementation Method 3
The choice of a vertical electrical field also offers the advantage of more or less eliminating reverberation phenomena of the waves against the ground
Data Source
AI summary
A system is provided for dynamically reading data from a tire transponder that includes a linear-polarization antenna. The system includes one ore more system antennas and one or more readers. Each system antenna is able to receive data transmitted by the tire transponder. Each reader is able to couple to the one or more antennas to read and store the data from the tire transponder. Each system antenna is a linear-polarization antenna with a vertical electric field.