Tire Pressure Sensor Programming Without Onboard Computer Access
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Solution Overview
Problem
Maintenance services cannot update the identifier and position of new pressure sensors in vehicle tires due to security restrictions, preventing effective communication with the onboard computer, especially in trucks where tire changes can occur on the road.
Innovation Solution
A programming method and device that activates pressure sensors, determines their current position, retrieves stored identifier-position pairs from a database, and programs the sensors with the correct identifier without accessing the onboard computer, using a TPMS tool or remote server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If maintenance services change tires with new pressure sensors on the road, then tire monitoring functionality is maintained, but the new sensors cannot be programmed with identifier and position data due to security restrictions preventing access to the onboard computer
Solution Approach 1:
The patent introduces a portable programming device as an intermediary between the pressure sensor and the onboard computer. This device contains a database with identifier-position pairs and can programmatically update sensors without requiring access to the vehicle's onboard computer, thus bypassing security restrictions while maintaining system integrity
Solution Approach 2:
The patent pre-populates a database with multiple identifier-position pairs corresponding to different sensor locations in the vehicle. When a sensor is replaced, the programming device can quickly retrieve and apply the appropriate pre-stored identifier and position data, eliminating the need for time-consuming re-learning procedures or access to the onboard computer
2Reliability
If the onboard computer is kept secure and inaccessible to maintenance services, then vehicle security is maintained, but tire sensor programming cannot be performed during roadside maintenance
Solution Approach 1:
The patent segments the sensor programming function from the onboard computer system. The programming capability is extracted into a separate portable device that maintains security by not requiring access to the vehicle's protected systems, while still enabling maintenance services to program new sensors independently
3Measurement precision
If traditional OBD connection methods are used to update sensor data, then accurate identifier-position pairing is achieved, but maintenance services cannot access the onboard computer for security reasons
Solution Approach 1:
The patent creates a portable copy of the identifier-position database that can be used offline without connecting to the onboard computer. This copy contains all necessary data for programming sensors, allowing maintenance to be performed anywhere while maintaining data accuracy through pre-stored authenticator values and identifier-position pairs
Data Source
AI summary
The present invention relates to a programming method for pressure sensors of vehicle tires, comprising:an activation of at least one programmable pressure sensor;a reception of at least one signal from said at least one pressure sensor after said activation;a determination of a current position in the vehicle of said at least one activated pressure sensor;a research in a database of a pair stored identifier-stored position, in which the stored position is the current position of said pressure sensor; anda programming of said at least one pressure sensor with the stored identifier.