TPMS Antenna Assembly With Field Cancellation for Localized Programming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tire pressure monitoring systems face challenges in establishing communication between tire pressure monitors and vehicle computer systems, particularly during manufacturing or sensor replacement, as existing programming tools require close proximity and may interfere with other signals or violate regulations due to high power emissions.
Innovation Solution
A tire pressure monitoring system featuring an antenna assembly with a transmitting antenna and a cancelling antenna, where the cancelling antenna cancels the field beyond a proximal zone, allowing effective communication with tire pressure monitors while minimizing interference and compliance with regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If higher power is used in programming tools to extend transmission distance, then communication range is improved, but interference with other signals increases and regulatory violations occur
Solution Approach 1:
The patent applies preliminary anti-action by using a cancelling antenna that generates an opposing electromagnetic field to counteract the transmitted signal beyond the proximal zone. This pre-established counter-field prevents the transmitted signal from causing interference or regulatory violations at a distance, while still allowing effective communication within the desired proximal range.
Solution Approach 2:
The patent implements local quality by creating a spatially differentiated electromagnetic field environment: within the proximal zone, the field strength is sufficient for reliable tire pressure monitor communication, while beyond this zone, the field is actively cancelled. This allows the system to provide strong local signals where needed without creating harmful distant interference.
2Reliability
If programming tools are positioned in close proximity to the sensor, then communication reliability is improved, but operational convenience deteriorates
Solution Approach 1:
The patent segments the operational space into a proximal zone where communication is reliable and effective, and a distant zone where signals are cancelled. This spatial segmentation allows the programming tool to maintain reliable communication with tire pressure monitors within the proximal zone while preventing unwanted interference in surrounding areas, thereby improving both reliability and operational convenience.
3Length of moving object
If transmission power is increased to overcome signal loss at distance, then communication distance is improved, but harmful interference increases
Solution Approach 1:
The system uses preliminary anti-action by deploying a cancelling antenna that generates an opposing field to counteract the transmitted signal beyond the proximal zone. This allows the transmitting antenna to operate at sufficient power levels for reliable communication at the desired distance while the cancelling antenna prevents harmful interference from propagating further.
Solution Approach 2:
The patent creates locally optimized field conditions by maintaining strong electromagnetic fields within the proximal zone for reliable communication while actively cancelling fields beyond this zone. This spatial differentiation of field strength allows extended transmission distance without proportionally increasing harmful interference.
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
Enables reliable communication with tire pressure monitors within a defined proximal zone without interfering with other signals, ensuring efficient programming and operation while adhering to regulatory limits.
Implementation Method 1
beyond the proximal zone, the field from the cancelling antenna cancels the field from the transmitting antenna
Implementation Method 2
The transmitting antenna has a wire loop defined by a plurality of coils with a first terminal and a second terminal
Data Source
AI summary
A tire pressure monitoring system is configured to communicate with a tire pressure sensor and has an antenna assembly and a transmitter. The antenna assembly has a transmitting and a cancelling antenna. The transmitting antenna has a wire loop defined by a plurality of coils with a first terminal and a second terminal. The cancelling antenna has a wire loop defined by a plurality of coils with a first terminal and a second terminal. The arrangement of the transmitting antenna and the cancelling antenna defines a proximal zone wherein a field from the transmitting antenna is configured to be sufficient to actuate the tire pressure monitor, while beyond the proximal zone, a field from the cancelling antenna cancels the field from the transmitting antenna. The transmitter is coupled to the transmitting antenna, and the cancelling antenna. An antenna and methods are likewise disclosed.