Wheel Identification via Signal Strength Correction
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Solution Overview
Problem
Conventional tire inflation pressure detecting apparatuses cannot automatically identify the location of transmitters (tires) on a vehicle without time-consuming ID signal registration, and they struggle to differentiate between signals from transmitters and external sources.
Innovation Solution
A wheel identifying apparatus with first and second transceivers, a triggering device, and a receiver, where the transceivers receive a trigger signal, correct its strength using a correction value, and transmit a response signal with signal strength information, allowing the receiver to identify the wheel location based on signal strength or transmission time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ID signals are registered in the receiver to identify transmitter locations, then wheel identification capability is improved, but the system becomes time-consuming and requires manual registration
Solution Approach 1:
The system performs automatic wheel identification without requiring manual registration of ID signals. The receiver autonomously determines transmitter locations by analyzing signal strength variations and transmission time differences, eliminating the need for human intervention in the registration process.
Solution Approach 2:
The system pre-registers ID signals in the receiver before actual use. This preliminary registration enables the receiver to automatically identify wheels during normal operation without requiring time-consuming manual registration at the moment of identification.
2Extent of automation
If the receiver attempts to identify transmitter locations using signal analysis, then automatic wheel identification is achieved, but the system must differentiate between internal transmitters and external signal sources
Solution Approach 1:
The system uses feedback from signal strength measurements and transmission time data to continuously refine its identification of transmitter locations. By comparing expected signal characteristics with actual received signals, the receiver can distinguish between internal transmitters and external sources.
Solution Approach 2:
The system changes multiple signal parameters including transmission time, signal strength thresholds, and frequency characteristics to differentiate between internal transmitters and external sources. By analyzing variations in these parameters, the receiver can reliably identify the origin of received signals.
3Loss of information
If transmitters are located at different distances from the triggering device, then signal strength varies providing location information, but the system must account for signal attenuation and interference
Solution Approach 1:
The system uses excessive signal strength measurements beyond what is strictly necessary for basic identification. By measuring signal strength at multiple thresholds and using redundant measurements, the system can reliably determine transmitter locations even in the presence of attenuation and interference.
Solution Approach 2:
The system performs preliminary calibration to establish expected signal strength levels for known transmitter positions. This preliminary action creates a reference framework that enables reliable location identification during actual operation, compensating for signal attenuation and environmental interference.
Data Source
AI summary
According to the present invention, a wheel identifying apparatus includes a plurality of transceivers, each of which is located on one of a plurality of wheels of a vehicle, a triggering device, a receiver, and a wheel identifier. The triggering device is located on a body of the vehicle at different distances from the transceivers and works to transmit a trigger signal. Each of the transceivers works to receive the trigger signal, determine the strength of the trigger signal thereat, correct the determined strength using a correction value, and transmit a response signal indicative of the corrected strength. The receiver works to receive all the response signals transmitted by the transceivers. The wheel identifier works to identify, for each of the response signals received by the receiver, the wheel on which the transceiver having transmitted the response signal is located based on the corrected strength indicated by the response signal.