Work Machine Cliff-Type Detection for Adaptive Stop Positioning
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Solution Overview
Problem
In work machines, particularly at sites like mines, it is challenging to appropriately stop travel when encountering cliffs, as existing systems do not differentiate between ascending and descending cliffs, leading to potential accidents.
Innovation Solution
A control system that includes a detection unit to identify cliff types, a position setting unit to adjust stop positions based on cliff type, and a traveling control unit to halt the machine accordingly, using sensors to detect obstacles and terrain features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the traveling stop control is performed without considering the type of cliff, then the control system is simple, but the work machine cannot appropriately stop travel
Solution Approach 1:
The system changes the stop position parameter based on the detected cliff type (ascending or descending). When an ascending cliff is detected, the stop position is set to a first position, while for a descending cliff, the stop position is set to a second position. This parameter adaptation enables appropriate travel stop control without requiring fundamentally different control systems.
Solution Approach 2:
The patent replaces complex mechanical or manual control mechanisms with an automated sensor-based detection and control system. By using sensors to detect cliff types and automatically adjusting stop positions, the system achieves reliable control without complex mechanical intervention.
2Object-affected harmful factors
If the stop position is fixed for all cliff types, then the control system is simple, but collisions or falls may occur
Solution Approach 1:
The system dynamically changes the stop position parameter based on cliff type detection. The control logic adjusts the stop position to a first position for ascending cliffs and a second position for descending cliffs, preventing collisions or falls while maintaining relatively simple control logic through parameter adaptation rather than complex decision trees.
3Productivity
If the work machine stops closer to the cliff, then productivity is improved, but the risk of falling increases
Solution Approach 1:
The system optimizes the stop position parameter based on the detected cliff type. For ascending cliffs, the machine can stop closer to the cliff face (first stop position) to maximize productivity, while for descending cliffs, the machine stops at a safer second position to prevent falls. This parameter adaptation allows the system to balance productivity and safety dynamically.
Data Source
AI summary
A control system for a work machine includes: a first detection data acquisition unit that acquires detection data of a first sensor that detects an object present in a traveling direction of the work machine; a determination unit that determines a type of a cliff present in the traveling direction on the basis of the detection data of the first sensor; a position setting unit that changes a stop position of the work machine on the basis of the type of the cliff; and a traveling control unit that stops travel of the work machine on the basis of the stop position.