Tire Pressure Sensor False Warning Reduction via Vehicle Stop Detection
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Solution Overview
Problem
Conventional tire air pressure measuring apparatuses often issue false warnings of errors due to the intermittent transmission of air pressure data signals when the vehicle stops, leading to incorrect determination of sensor module failures.
Innovation Solution
Incorporating a vehicle-stop judgment unit that determines if the vehicle has stopped based on constant received signal strength, and only issues a warning if the vehicle is not stopped and the air pressure data signal is not received for an extended period, thereby distinguishing between actual transmission failures and normal operation during vehicle stoppage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the error determining duration is set equal to or longer than the predetermined transmitting interval (e.g., 60 minutes), then the system can detect actual transmission failures, but false warnings are generated when the vehicle stops and signal transmission is naturally interrupted
Solution Approach 1:
The patent applies dynamics by making the error determination process adaptive to vehicle operation states. The system dynamically adjusts its monitoring behavior based on whether the vehicle is running or stopped, using a vehicle-stop judgment unit to detect stop conditions and suspend error determination during stops. This prevents false warnings while maintaining reliability during actual operation.
Solution Approach 2:
The system changes the operational parameters of error determination based on vehicle state. When the vehicle-stop judgment unit detects a stop condition, the system effectively changes the error determination parameter from 'active monitoring' to 'suspended monitoring', preventing false warnings during stoppage while maintaining active error detection during operation.
2Measurement precision
If the receiver continuously monitors for air pressure data signals at predetermined transmitting intervals, then transmission failures can be detected, but normal operation during vehicle stoppage is misidentified as transmission failures
Solution Approach 1:
The patent implements feedback by using the vehicle-stop judgment unit to provide state information to the warning control unit. The system continuously monitors vehicle operation state and uses this feedback to modulate the error determination process, suspending warnings when stop conditions are detected and resuming when the vehicle is running, thereby improving warning accuracy.
Solution Approach 2:
The system dynamically adjusts its monitoring and warning behavior based on real-time vehicle state. The error determination process is made dynamic by conditionally suspending or resuming based on whether the vehicle is stopped or running, allowing precise monitoring during operation while avoiding false alarms during stoppage.
3Ease of operation
If the air pressure sensor module rotates with the tire and transmits signals wirelessly, then tire pressure can be measured during rotation, but signal transmission becomes intermittent when the module is in certain positions
Solution Approach 1:
The system performs preliminary action by detecting vehicle stop conditions before error determination occurs. By using the vehicle-stop judgment unit to identify stop states in advance, the system can preemptively suspend error determination during stops, preventing the loss of information that would otherwise occur due to intermittent signal transmission during rotation.
Data Source
AI summary
A tire pressure measuring apparatus provides a warning of an error of a tire air pressure measuring module only when it is not that determined a vehicle stops and also any on of receivers has not received an air pressure data signal for an error determining duration. Therefore, a probability of a false warning can be reduced.