TPMS Self-Positioning Using Positioning Circuits
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Solution Overview
Problem
Existing tire pressure monitoring systems (TPMS) face challenges in self-positioning tires without the need for extra wires, as current methods either require complex algorithms, external devices, or alter the vehicle's original wiring.
Innovation Solution
A method and apparatus that utilize a receiver with a first positioning circuit and emitters with a second positioning circuit to acquire and transmit position information, allowing for self-positioning without additional wires by using communication modes to ensure accurate relative positioning between the receiver and emitters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If field intensity based self-positioning method is used, then cost is low and most functions are achieved via software algorithms, but wires of vehicle are needed to be depended on, signals are interfaced easily, and algorithms are complicate and hard to be achieved
Solution Approach 1:
The patent replaces the field intensity based software algorithm approach with a positioning circuit based hardware solution. The receiver and emitters use positioning circuits to directly determine tire positions through signal transmission and reception, substituting complex software algorithms with a more straightforward hardware-based measurement system.
Solution Approach 2:
The patent introduces positioning circuits as intermediary devices between the tire pressure monitoring system and the vehicle wiring. These circuits act as mediators that simplify the interface requirements while maintaining accurate position detection, reducing the complexity of direct wiring dependencies.
2Reliability
If self-positioning method based on external encoding memory is used, then signals is not interfaced easily and it has a high successful rate, but an external device is needed in the accessories for tires additionally, which results in high cost, and extra wires are needed
Solution Approach 1:
The patent merges the positioning circuit functionality directly into the existing emitter and receiver components of the TPMS. Instead of adding separate external encoding memory devices and extra wires, the positioning capabilities are integrated into the standard TPMS hardware, reducing system complexity while maintaining high positioning success rates.
Solution Approach 2:
The positioning circuits in the patent serve multiple functions: they detect tire position, communicate with the receiver, and integrate with the existing pressure monitoring capabilities. This multi-functionality eliminates the need for separate external devices and reduces the overall system complexity.
3Ease of operation
If self-positioning method based on CAN bus is used, then an emitter is needed to be placed near the position of a remote pressure monitoring circuit, but this limits installation flexibility and may require additional wiring
Solution Approach 1:
The patent segments the positioning functionality into distributed positioning circuits within each emitter and a corresponding receiver circuit. This segmentation allows each component to operate independently and communicate through standard TPMS channels, eliminating the need for emitters to be placed near specific monitoring circuit locations and reducing wiring requirements.
Data Source
AI summary
A method for self-positioning tires and a tire pressure monitoring system are provided. The method for self-positioning tires includes: acquiring first position information detected by the first positioning circuit; acquiring second position information of each emitter respectively via corresponding second positioning circuit; and acquiring corresponding relative position information respectively between the receiver and each emitter based on the first position information of the receiver and the second position information of each emitter. In this way, compared with the method for achieving self-positioning function in the art, extra wires may not be needed and the origin wires of a vehicle may not be altered in the method of the present disclosure.