Excavator Controller Driving Assistance Suppression
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Solution Overview
Problem
Operators of work machinery with conventional driving assistance and work assistance functions experience cumbersome alerts and deceleration when obstacles are detected outside the work range, leading to decreased efficiency.
Innovation Solution
A work machinery system with a controller that adjusts the driving assistance function based on the work assistance function's enabled state, reducing alert volume and deceleration coefficients for obstacles detected outside the work range when the work assistance function is enabled, allowing for smoother operation and increased efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving assistance function alerts the operator or decelerates the work implement when an obstacle is detected in the monitoring range, then safety is improved, but the operator feels cumbersome and work efficiency decreases when the obstacle is outside the work range
Solution Approach 1:
The patent applies local quality by differentiating the driving assistance function's response based on the obstacle's location. When the work assistance function is enabled and the obstacle is outside the work range, the driving assistance function is suppressed. When the obstacle is inside the work range or the work assistance function is disabled, the full driving assistance function operates. This localized adjustment resolves the contradiction by tailoring the safety response to the specific operational context.
Solution Approach 2:
The patent implements dynamics by making the driving assistance function dynamically adjustable based on the work assistance function's enabled state and the obstacle's position. The controller dynamically suppresses or activates the driving assistance function according to real-time conditions, allowing the system to adapt between safety-critical modes and efficiency-optimized modes, thereby resolving the contradiction between safety and work efficiency.
2Reliability
If the driving assistance function decelerates the work implement when an obstacle is detected in the monitoring range, then safety is improved, but work efficiency decreases due to unnecessary deceleration outside the work range
Solution Approach 1:
The patent applies local quality by spatially differentiating the deceleration response. When the obstacle is outside the work range and the work assistance function is enabled, deceleration is suppressed. When the obstacle is inside the work range or the work assistance function is disabled, full deceleration applies. This resolves the contradiction by applying safety measures only where genuinely needed.
Solution Approach 2:
The patent implements dynamics by making the deceleration function dynamically controllable based on the work assistance function's state. The controller dynamically adjusts whether deceleration occurs by evaluating the obstacle's position relative to the work range and the work assistance function's enabled state, thereby eliminating unnecessary deceleration while maintaining safety where required.
3Reliability
If the work assistance function prevents the work implement from deviating from the work range, then damage to electric wires or buried objects is prevented, but the operator experiences more restrictions on operation
Solution Approach 1:
The patent applies local quality by making the work assistance function's restrictions location-dependent. The function only actively constrains the work implement when the obstacle is within the work range. When the obstacle is outside the work range, the work assistance function's constraints are relaxed or suppressed, thereby protecting infrastructure where needed while maintaining operator freedom elsewhere.
4Reliability
If the work assistance function limits the swivel direction region, then the work implement is prevented from straying onto the road, but the operator's operational flexibility is reduced
Solution Approach 1:
The patent applies local quality by making the swivel direction limitation conditional on the obstacle's position and the work assistance function's enabled state. When the obstacle is outside the work range and the work assistance function is enabled, the swivel limitation is relaxed. When the obstacle is inside the work range or the work assistance function is disabled, full swivel limitations apply. This resolves the contradiction by providing safety restrictions only in the specific local context where they are necessary.
Data Source
AI summary
The hydraulic excavator 1 includes a work implement 7, a detection device that detects an obstacle around the hydraulic excavator 1, and a controller 27 that controls the operation of the work implement 7. The controller 27 has a driving assistance function and a work assistance function. The work assistance function is switchable between enabled and disabled. When the work assistance function is switched to enabled, the controller 27 suppresses, for an obstacle detected in a monitoring range but outside of a work range, the driving assistance function in comparison with when the work assistance function is switched to disabled.