Work Vehicle Audible Alert Patterns for Abnormality Recognition
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Solution Overview
Problem
Existing work vehicles lack the ability to effectively distinguish and notify drivers of various vehicle abnormalities through simple and cost-effective means, particularly in terms of type and urgency, beyond the use of pulsations or buzzer sounds.
Innovation Solution
A work vehicle equipped with a vehicle state detecting section, abnormality detecting section, abnormal state determination section, output period pattern determination section, and acoustic device to output simple audible sounds with distinct patterns for different abnormalities, accompanied by visual displays for detailed information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a buzzer device is used to notify vehicle abnormalities, then the notification can be heard, but the driver cannot distinguish between different types of vehicle abnormalities
Solution Approach 1:
The patent applies periodic action by using different output period patterns for the buzzer sound. Instead of a single continuous or uniform sound, the system varies the timing intervals between sound outputs to encode different abnormality types. For example, one abnormality type might trigger a sound pattern with short intervals, while another triggers a pattern with long intervals, allowing the driver to distinguish between different issues based on the temporal pattern of the sound notifications.
2Reliability
If pulsation intensity is increased during high-speed traveling to make abnormalities detectable, then the driver can feel the pulsation, but it becomes difficult to grasp the type of vehicle trouble
Solution Approach 1:
The patent resolves this contradiction by introducing periodic variation in the pulsation pattern. Different abnormality types are represented by distinct pulsation rhythms or intervals, not just by intensity. This allows the driver to identify the type of abnormality through the temporal pattern of pulsations while maintaining sufficient intensity for detectability during high-speed travel.
Solution Approach 2:
The system changes multiple parameters of the notification signal simultaneously - both the intensity (to ensure detectability) and the temporal pattern (to encode abnormality type). By varying the output period and rhythm parameters according to the detected abnormality type, the system provides both sufficient alertness and specific diagnostic information to the driver.
3Loss of information
If multiple types of notification devices are used to distinguish different abnormalities, then various abnormality types can be identified, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by varying the temporal characteristics (output period, interval, rhythm) of a single acoustic device rather than using multiple different types of notification devices. This approach allows the system to encode multiple abnormality types using one buzzer, significantly reducing device complexity while still providing differentiated information about various vehicle issues through sound timing patterns.
Data Source
AI summary
A work vehicle includes a vehicle state detecting section configured to detect a vehicle state and output a state detecting signal, an abnormality detecting section configured to detect a vehicle abnormality based on the state detecting signal, an abnormal state determination section configured to determine an abnormal state of the vehicle abnormality thus detected, an output period pattern determination section configured to determine one output period pattern from a plurality of output period patterns of simple audible sound based on the abnormal state, and an acoustic device configured to repeatedly output the simple audible sound based on the one output period pattern determined by the output period pattern determination section as abnormality notification sound.