Battery-Aware Work Vehicle Speed Restriction for Range Protection
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Solution Overview
Problem
Users of work vehicles engaged in utility work in fields may fail to notice predictions of fuel consumption efficiency deterioration, leading to unexpected stops due to energy source exhaustion at distant locations from replenishment sites, causing inconvenience and trouble in replenishing the energy source.
Innovation Solution
A work vehicle equipped with a driving wheel, power source, output instruction acquisition section, traveling control unit, reservoir section for energy storage, remaining amount detection section, and a restriction section that reduces maximum speed when the energy source reaches a preset threshold, prompting the user to replenish the energy source by creating awareness of diminishing energy levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the work vehicle operates at normal speed without intervention, then productivity is maintained, but the user may fail to notice energy source depletion leading to unexpected stops
Solution Approach 1:
The system applies preliminary anti-action by preemptively restricting the vehicle speed when the energy source remaining amount falls below a threshold value. This prevents the harmful effect of unexpected stops by acting before energy depletion occurs, while the restriction is designed to be minimal enough not to significantly impact overall productivity.
2Loss of information
If the maximum speed is restricted to alert the user, then awareness of energy depletion is improved, but traveling time increases
Solution Approach 1:
The speed restriction mechanism employs dynamics by adjusting the maximum speed based on the remaining energy source amount. When energy is充足, normal speed is maintained. When energy drops below the threshold, speed restriction is applied dynamically to alert the user, creating a variable operational state that balances awareness and efficiency.
3Use of energy by moving object
If the work unit is stopped to conserve energy, then energy source preservation is improved, but work productivity decreases
Solution Approach 1:
The system stops the work unit as a preliminary anti-action when energy source depletion is detected, preventing the more severe consequence of vehicle stoppage. This hierarchical approach prioritizes maintaining mobility over continuous work output, ensuring the vehicle can reach a replenishment site while minimizing overall productivity loss.
Data Source
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AI summary
A work vehicle (1) includes a driving wheel (3) provided in a machine body, a motor (20) for inputting a rotational force to the driving wheel (3), a traveling control device (2) for acquiring an output instruction for the motor (20) according to an operation of a maneuvering lever (8), a traveling control unit (6) for controlling driving of the motor (20) in accordance with the output instruction, a battery (23) for reserving energy source for driving the motor (20), a remaining amount detection section (52) for detecting a remaining amount of the energy source in the battery (23), and a restriction section (53) for restricting a maximum speed of the machine body to a preset speed irrespectively of the output instruction if the remaining amount of the energy source is equal to or smaller than a preset first threshold value.