TPMS Sensor Pattern Modulation for Automatic Vehicle ID Recognition
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Solution Overview
Problem
The existing tire pressure monitoring system (TPMS) fails to provide facility use permission when a new tire is substituted, as the tire ID is not registered in the in-facility apparatus, requiring users to manually correct errors and re-register tire IDs, which is time-consuming and troublesome.
Innovation Solution
The facility-use management system includes an in-vehicle control apparatus and an in-facility apparatus that transmit and receive tire IDs wirelessly, allowing the system to adjust the transmission pattern of electric waves to express a vehicle ID, enabling automatic use permission even when a tire ID is not registered, by using the pre-replacement tire ID as a vehicle ID, thus eliminating the need for manual re-registration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual registration methods (handwritten application, electronic application, push button manipulation) are used to register tire IDs, then the in-facility apparatus can identify permitted vehicles, but users experience time-consuming and troublesome re-registration processes when tires are replaced
Solution Approach 1:
The system enables self-service by automatically performing vehicle identification when a tire is replaced. The in-vehicle control apparatus autonomously transmits the vehicle ID through the sensor unit without requiring user intervention for manual registration, allowing the system to serve itself during tire replacement operations.
Solution Approach 2:
The sensor unit acts as an intermediary that facilitates communication between the in-vehicle control apparatus and the in-facility apparatus. It transmits both tire IDs and vehicle IDs wirelessly, enabling the in-facility apparatus to identify the vehicle without direct user input during tire replacement.
2Reliability
If manual registration methods are used for tire ID registration, then the system can maintain security control, but users incur significant effort and potential errors in correcting wrong tire IDs
Solution Approach 1:
The system performs automatic vehicle identification without requiring users to manually input or correct tire IDs. The in-vehicle control apparatus automatically transmits the correct vehicle ID through the sensor unit, eliminating user errors and simplifying the operation while maintaining security through automated verification at the in-facility apparatus.
Solution Approach 2:
The sensor unit serves multiple functions: it not only monitors tire pressure but also transmits vehicle identification information. This multi-functionality allows the same component to provide both safety monitoring and identification services, reducing the need for separate manual registration processes.
3Reliability
If the system requires exact tire ID matching for facility permission, then security is maintained, but any tire substitution prevents use permission from being provided
Solution Approach 1:
The vehicle ID serves as an intermediary identification method that bridges the gap between tire replacement and facility permission. When a tire ID changes due to replacement, the system uses the vehicle ID transmitted through the sensor unit as an alternative key to verify the vehicle's entitlement to facility use, maintaining security while adapting to tire substitutions.
Solution Approach 2:
The vehicle ID is pre-associated with the vehicle's entitlement to facility use in the in-facility apparatus. This preliminary registration of vehicle ID allows the system to quickly verify permission without requiring re-registration when tires are replaced, enabling rapid adaptation to tire substitutions while maintaining security control.
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
This configuration automatically provides facility use permission by expressing the vehicle ID through adjusted transmission patterns, reducing user effort and costs, and can be implemented with minimal changes to the existing TPMS system.
Implementation Method 1
an in-facility reception section that receives the first tire ID transmitted wirelessly from the sensor unit
Implementation Method 2
a transmission pattern adjustment section that adjusts a transmission pattern on electric waves transmitted from the sensor unit wirelessly to express the first vehicle ID
Data Source
AI summary
A management computer transmits to a vehicle a request of vehicle ID to identify the vehicle, when a tire ID of the vehicle is not registered in a registration portion. Upon receiving the request, a transmission pattern adjustment section of an ECU of tire pressure monitoring system of the vehicle controls a sensor unit of at least one tire to transmit electric waves in transmission pattern expressing the vehicle ID. The management computer permits the vehicle to use a facility when a vehicle ID specified from the received transmission pattern on electric waves is registered in a registration portion.