Wheel Loader Reverse Obstacle Control During Scooping Work
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Solution Overview
Problem
Conventional collision suppression systems in wheel loaders mistakenly detect the ground surface as an obstacle during scooping work on sloped terrain, leading to unnecessary warnings and operational challenges.
Innovation Solution
A work machine equipped with a rearward detecting section and a control system that validates or invalidates collision controls based on the scooping work state, preventing false obstacle detections by disabling warnings and brakes during scooping operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the collision suppression system detects objects during reverse travel, then safety is improved by issuing warnings, but false warnings occur during scooping work when the ground surface is mistakenly detected as an obstacle
Solution Approach 1:
The control system dynamically adjusts its behavior based on the work implement state. When scooping work is detected, the system switches to a mode that suppresses false warnings, and when scooping work is not detected, it returns to normal obstacle detection mode. This dynamic adaptation resolves the contradiction by making the system context-aware.
Solution Approach 2:
The system changes the detection parameters or validation criteria based on the work state. During scooping work, the system modifies how detection results are interpreted or validated, preventing ground surface from being mistakenly identified as an obstacle, thereby reducing false warnings while maintaining safety.
2Productivity
If the obstacle warning is stopped during scooping work to avoid false alarms, then operational smoothness is improved, but the system may fail to detect legitimate obstacles after withdrawal from scooping work
Solution Approach 1:
The system dynamically transitions between different operational modes based on the work implement state. During scooping work, it suppresses warnings to improve efficiency, and automatically transitions back to normal detection mode when scooping work ends, ensuring continuous safety monitoring without manual intervention.
Solution Approach 2:
The system continuously monitors the work implement state and uses this feedback to adjust its warning behavior. When the sensor detects that scooping work has been completed, it automatically restores obstacle detection functionality, ensuring that the system adapts to changing operational conditions in real-time.
3Measurement precision
If the ground surface is detected as an obstacle during reverse travel on sloped terrain, then detection sensitivity is improved, but unnecessary warnings are issued during normal scooping operations
Solution Approach 1:
The system changes the detection or validation parameters based on the work state. During scooping work, it modifies how detection results are processed or validated, preventing ground surface from being mistakenly identified as an obstacle, thereby reducing false warnings while maintaining detection sensitivity for real obstacles.
Solution Approach 2:
The work state detection mechanism acts as an intermediary that filters detection results. By introducing this intermediate validation layer, the system can distinguish between legitimate obstacles and ground surface detections during scooping work, preventing false warnings while maintaining high detection sensitivity.
Data Source
AI summary
A work machine includes a vehicle body, a rearward detecting section, and a control section. The vehicle body includes a traveling unit and a work implement disposed in front of the traveling unit. The rearward detecting section is configured to detect an object when traveling in reverse due to driving of the traveling unit. The control section is configured to decide to validate or invalidate a first control according to a detection of the object, a state of traveling in reverse, and a scooping work state by the work implement. The control section is configured to decide to validate the first control based on the scooping work state when the first control is invalidated.