Vehicle Alarm Vibration Frequency Adaptation
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Solution Overview
Problem
Vehicle alarm vibrations are often masked by road surface and engine vibrations, making it difficult for drivers to recognize the alarm, especially at high speeds or in deteriorating road conditions.
Innovation Solution
A vehicle alarm system that adjusts the frequency of the alarm vibration based on travel situation information, using a vibration generator to produce high-band or low-band frequencies depending on the travel situation, ensuring a noticeable difference between the alarm vibration and ambient vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the level of alarm vibration is increased in accordance with travel speed or vehicle conditions, then the alarm vibration magnitude increases, but the alarm vibration is masked by increased travel vibration
Solution Approach 1:
The patent changes the frequency parameter of the alarm vibration based on travel situation information. When travel vibration is high (e.g., high speed, poor road conditions), the system shifts alarm vibration frequency away from the dominant low-frequency range of travel vibration to a different frequency range, preventing masking while maintaining alarm effectiveness
Solution Approach 2:
The system acquires travel situation information (speed, engine RPM, road conditions) as feedback and uses this information to dynamically adjust the alarm vibration frequency. This closed-loop approach ensures the alarm frequency adapts to current vibration conditions to maintain distinguishability
2Power
If a simple volume increase of alarm vibration is used, then the alarm signal strength increases, but the alarm vibration remains masked by travel vibration
Solution Approach 1:
Instead of simply increasing power/volume, the patent changes the frequency parameter of the alarm vibration. By shifting to a frequency range less affected by travel vibration, the alarm becomes distinguishable without requiring excessive power increase
3Device complexity
If alarm vibration frequency is fixed, then the system is simple to implement, but the alarm may be masked by travel vibration at certain frequencies
Solution Approach 1:
The patent makes the alarm vibration frequency dynamic rather than fixed. The frequency automatically adjusts based on travel situation information, allowing the system to avoid frequency ranges where masking occurs while maintaining operational simplicity through automated adaptation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively ensures the driver can feel and recognize the alarm vibration by adjusting the frequency to match the travel situation, preventing masking by ambient vibrations and maintaining the alarm's distinguishability.
Implementation Method 1
a vibration generator configured to generate an alarm vibration having a frequency corresponding to a frequency of a received alarm signal
Implementation Method 2
a vibration transmission member configured to transmit the alarm vibration generated by the vibration generator to a user
Data Source
AI summary
To allow an alarm vibration generated by a vibration generator to be recognized by a user through a vibration transmission member. A vehicle alarm device (100) includes a vibration generator (30) configured to generate an alarm vibration having a frequency corresponding to a frequency of a received alarm signal, a vibration transmission member (90) configured to transmit the alarm vibration to a user, a travel situation information acquisition unit (70) configured to acquire travel situation information in accordance with a travel situation of the vehicle, and an alarm signal generator (70) configured to generate the alarm signal such that when the value of the acquired travel situation information is high, a signal to be inputted to the vibration generator (30) includes at least a high-band frequency and such that when the value of the travel situation information is low, the signal to be inputted to the vibration generator (30) includes at least a low-band frequency.