Tire Pressure Monitoring Trigger Transmitter Allocation
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Solution Overview
Problem
Existing tire monitoring systems require a separate trigger transmitter for each axle position, leading to increased costs, especially for vehicles with three or more axles.
Innovation Solution
The method involves arranging a smaller number of trigger transmitters such that each axle position is within the triggering range of at least one transmitter, allowing the electronic evaluation system to calculate wheel unit positions based on the vehicle's axle formula, reducing the need for multiple trigger transmitters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate trigger transmitter is assigned to each axle position, then accurate wheel position identification is achieved, but the number of trigger transmitters increases significantly
Solution Approach 1:
The patent merges the functions of multiple trigger transmitters into a single trigger transmitter that can trigger multiple wheel units across different axle positions. This is achieved by having the single trigger transmitter transmit trigger signals that can be received by wheel units at various positions, thereby reducing the total number of trigger transmitters from multiple (one per axle position) to just one, while maintaining the capability to identify all wheel positions accurately.
Solution Approach 2:
The single trigger transmitter is designed with multi-functionality to serve multiple axle positions simultaneously. It can transmit trigger signals that reach wheel units at different positions, and the evaluation system can determine which wheel units were triggered based on their responses. This universal trigger transmitter replaces multiple specialized trigger transmitters, each dedicated to a single axle position.
2Quantity of substance
If fewer trigger transmitters are used, then costs are reduced, but the ability to accurately identify all axle positions may be compromised
Solution Approach 1:
The system employs feedback mechanisms where wheel units that receive trigger signals respond by transmitting their identification data back to the evaluation system. The evaluation system uses this feedback to determine which wheel units were successfully triggered and to identify their axle positions. This feedback loop ensures accurate position identification even with a single trigger transmitter, as the system can track which wheels responded to the trigger signal.
Solution Approach 2:
The evaluation system acts as an intermediary that processes the trigger signals and the responses from wheel units. It correlates the trigger signals with the received data telegrams to determine axle positions. This intermediary processing ensures that even though only one trigger transmitter is used, the system can still accurately identify all axle positions by analyzing which wheel units responded to the trigger.
Data Source
AI summary
Allocating first transmitters of a tire monitoring system, especially of a tire-pressure monitoring system having a wheel unit comprising a sensor, a first transmitter, which can be triggered, and a sending antenna on each of N wheels arranged on L axles of a vehicle according to a predetermined axle formula, further having receiving antenna on the vehicle body associated to the first transmitters and an electronic receiver and evaluation system, connected to receiving antenna by allocating an identifier characteristic of a particular wheel to its respective first transmitter, by emitting data telegrams, which contain the identifier, in response to a triggering action of second transmitters, and passing on such data telegrams to the central electronic receiver and evaluation system. The number n of the trigger transmitters is smaller than the number A of the axle positions, that each axle position is associated to a triggering range of n trigger transmitters.