Tire Pressure Monitoring System with Separate Critical Data Line
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Solution Overview
Problem
Existing tire pressure monitoring systems face delays in transmitting critical pressure data to the control unit, particularly during rapid pressure drops, which can lead to safety issues due to the reliance on a serial bus system that requires periodic requests for data transfer.
Innovation Solution
A separate data transfer line is introduced between the receiver and the control unit to allow for immediate, unrequested transmission of critical pressure data, bypassing the waiting period associated with the serial bus system, enabling rapid communication of critical data to the control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a serial bus system is used for data transmission between the receiver and control unit, then the system structure is simplified and controlled communication is achieved, but critical pressure data transmission is delayed due to request-based communication protocol
Solution Approach 1:
The communication system is segmented into two independent channels: a serial bus system for normal controlled communication and a separate data transfer line for critical data transmission. This segmentation allows each channel to serve its specific function optimally without interfering with the other, resolving the contradiction between structured communication and rapid critical data transmission.
Solution Approach 2:
A separate data transfer line acts as an intermediary channel between the receiver and control unit. This intermediary provides an alternative path for critical pressure data that bypasses the request-based serial bus protocol, enabling immediate transmission without waiting for controller requests while maintaining the structured serial bus for normal operations.
2Reliability
If a request-based serial bus system is used, then power consumption is reduced and communication is controlled, but critical data cannot be transmitted immediately without controller intervention
Solution Approach 1:
The system dynamically switches between two communication modes: normal request-based serial bus communication for routine operations and immediate unrequested transmission via the separate data transfer line for critical conditions. This dynamic adaptation allows the system to optimize between power consumption/controlled communication and rapid response based on the urgency of the data being transmitted.
3Loss of time
If the control unit continuously monitors pressure data, then critical data is detected immediately, but power consumption increases and system resources are wasted during normal operation
Solution Approach 1:
Instead of continuous monitoring, the system uses periodic request-based communication through the serial bus for normal operations, reducing power consumption. The separate data transfer line provides an exception mechanism that triggers immediate transmission only when critical conditions are detected, ensuring rapid response without the energy cost of continuous monitoring.
Data Source
AI summary
The invention relates to a tire pressure monitoring system with a wheel electronic to be installed in a pneumatic tire, comprising a battery as power source, a pressure sensor for measuring of tire pressure or pressure change, and a transmitter for transmitting pressure data, a receiver to be mounted either in or at the vehicle for receiving pressure data, a control unit for evaluating of pressure data, and a serial bus system via which, during operation, the control unit interrogates the receiver and receives subsequently pressure data from the receiver. In accordance with the invention it is provided that additionally to the serial bus system the receiver is also connected with the control unit via a data transfer line that is separate from the serial bus system, wherein the receiver notifies the control unit of critical pressure data via the data transfer line in an unrequested manner.