Vehicle Transmitter Standby Mode Trigger Mechanism
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Solution Overview
Problem
Transmitters mounted on vehicles can be inadvertently set to unintended modes due to external noise signals that resemble trigger signals, leading to incorrect operation.
Innovation Solution
A transmitter system that requires a two-step process to set modes, shifting to a standby state and then designating the mode, with a trigger device transmitting separate signals for each step to prevent erroneous mode settings by external noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the trigger reception unit receives trigger signals in the frequency band, then the transmitter can be controlled to change modes, but external noise in the same frequency band may cause unintended mode setting
Solution Approach 1:
The transmitter is set to standby state as a preliminary condition before mode setting can occur. This preliminary state change ensures that only intentional trigger signals (not external noise) can subsequently set the mode, as the standby state acts as a preparatory gate that must be deliberately activated before mode configuration is accepted.
Solution Approach 2:
The mode setting process is segmented into two distinct steps: first transitioning to standby state, then setting the actual mode. This segmentation separates the mode setting function from continuous operation, creating a discrete two-phase process that reduces the risk of accidental mode changes from external noise interference.
2Speed
If the transmitter continuously monitors for trigger signals, then it can respond quickly to mode change commands, but it becomes vulnerable to external noise interference
Solution Approach 1:
The system performs a preliminary state transition to standby before accepting mode setting commands. This preliminary action creates a controlled receptivity window that maintains quick response capability for intentional commands while filtering out external noise that occurs during normal operation states.
Solution Approach 2:
The standby state acts as an intermediary condition between normal operation and mode setting. This intermediate state serves as a buffer that allows the system to remain responsive to trigger signals while preventing direct mode setting from external noise, as the intermediary standby state must be actively engaged before mode changes are permitted.
Data Source
Figure 1~2
Figure 3~4
AI summary
A transmitter is mounted on each of a plurality of wheel assemblies included in a vehicle. The transmitter executes a process in accordance with a command included in a trigger signal. The transmitter includes a pressure sensor that detects the tire pressure, a transmission unit that transmits a data signal including a detection result of the pressure sensor to a receiver, a trigger reception unit that receives the trigger signal, and a controller that controls the transmitter. When the trigger reception unit receives the trigger signal including a command shifting a state of the transmitter to a standby state, the controller shifts the state of the transmitter to the standby state. Further, when the trigger reception unit receives the trigger signal including a command designating a mode while the state of the transmitter is the standby state, the controller sets the designated mode.