Transmitter for Wheel Assemblies with Unmodulated Wave Filtering
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Solution Overview
Problem
Prior art transmitters in tire condition monitoring systems often misidentify unmodulated waves as trigger signals due to environmental changes, leading to increased power consumption and reduced battery life, as they respond repeatedly to unmodulated waves of the same frequency band.
Innovation Solution
The transmitter includes a controlling section that accumulates reception time or number of responses to unmodulated waves and shifts into a restriction state when a predetermined threshold is reached, limiting responses to unmodulated waves and reducing power consumption, with additional triggers based on vehicle state and pressure fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the trigger receiving section receives unmodulated waves with received signal strength indication greater than or equal to a predetermined threshold, then the transmitter can respond to genuine trigger signals, but it misidentifies environmental unmodulated waves as trigger signals leading to increased power consumption
Solution Approach 1:
The controlling section accumulates reception time of unmodulated waves before triggering a response. This preliminary accumulation action filters out transient environmental waves that don't meet the predetermined time threshold, while still allowing genuine trigger signals to be recognized and responded to, thus reducing false responses and power consumption
Solution Approach 2:
The system dynamically adjusts its response behavior based on accumulated reception time. When the accumulated time exceeds the predetermined threshold, the controlling section restricts responses to unmodulated waves. This dynamic adjustment allows the system to adapt to environmental conditions and reduce power consumption during periods of high environmental interference
2Speed
If the transmitter responds to every unmodulated wave received, then it maintains high responsiveness to trigger signals, but it causes excessive power consumption and reduces battery life
Solution Approach 1:
The controlling section performs preliminary accumulation of reception time before executing a response. This ensures that only unmodulated waves persisting beyond a predetermined threshold trigger a response, maintaining responsiveness to genuine signals while filtering out transient environmental interference that would otherwise consume battery power
Solution Approach 2:
The system uses feedback from the accumulated reception time to control whether to respond to unmodulated waves. When the accumulated time exceeds the predetermined threshold, the controlling section restricts responses. This feedback mechanism maintains high responsiveness to genuine trigger signals while reducing unnecessary responses to environmental waves, thereby extending battery life
Data Source
AI summary
A transmitter is configured to be attached to each of wheel assemblies in a vehicle and execute a process in accordance with a command included in a trigger signal. The transmitter includes a condition detecting section, a trigger receiving section which receives, as the trigger signal, an unmodulated wave having a received signal strength indication a transmitting section, and a controlling section. When the trigger receiving section receives the unmodulated wave, the controlling section causes the transmitting section to transmit the signal in response to the unmodulated wave. The controlling section is configured to execute an accumulation process to accumulate reception time of the unmodulated wave from a starting point in time, and shift into a restriction state to restrict a response to the unmodulated wave when the accumulated reception time reaches a predetermined time.