Rice Transplanter Controls Using Sequential Dual-Button Inputs
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Solution Overview
Problem
Conventional operation devices for work machines have limited functionality when multiple operation portions are simultaneously pressed, leading to low operability.
Innovation Solution
An operation device that outputs a first action instruction when two operation portions are initially activated and then changes one to an off-state before activating it again, allowing for a different second action instruction, enhancing operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the conventional operation device limits the functions executable by simultaneous operation of two operation portions, then the device complexity is reduced, but the operability of the operation device deteriorates
Solution Approach 1:
The operation device dynamically changes the function assigned to operation portions based on the operational state. When one operation portion is activated and then deactivated before another is activated, the system transitions to a different functional mode, allowing the same hardware components to perform multiple different functions depending on the sequence and timing of operations
Solution Approach 2:
The system changes the functional parameter of the operation portions based on the temporal sequence of activation and deactivation. By detecting whether an operation portion is deactivated after being activated, the system determines which function to execute, effectively using state parameter changes to expand functionality without adding hardware complexity
2Productivity
If the conventional operation device provides limited functions for simultaneous operation of two operation portions, then the manufacturing cost is reduced, but the productivity of the work machine deteriorates
Solution Approach 1:
The operation device achieves multi-functionality by making the operation portions universal. The same operation portions can execute different functions depending on the operational sequence - either executing the function of the second activated portion or executing a predetermined function based on deactivation detection, thereby providing multiple functions without requiring additional dedicated components for each function
Data Source
AI summary
An operation device outputs a forward travel instruction to a rice transplanter when receiving a simultaneous pressing operation to change both an acceleration button and a deceleration button among a plurality of operation portions to the ON-state and, while maintaining the one operation portion out of the acceleration button and the deceleration button in the ON-state after the simultaneous pressing operation, changes the other operation portion from the ON-state to the OFF-state and then, when receiving the operation to change the other operation portion from the OFF-state to the ON-state, outputs a vehicle speed change instruction to the rice transplanter.