Work Machine Avoidance Control Under Abnormal Signal Conditions
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Solution Overview
Problem
Existing work machine systems face challenges in preventing collisions with obstacles even when abnormalities occur in image transmission or device identification systems, leading to potential contact due to vehicle inertia.
Innovation Solution
The work machine system incorporates a control device with an abnormality detection section, an avoiding movement necessity determination section, and an avoidance control instruction section. This system calculates and prioritizes avoidance control instructions to change the moving direction of the work machinery and prevent collisions with obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the operation signal is restricted during abnormality and vehicle body speed is lowered, then the operator can operate the work machine with caution, but inertia of the vehicle body might cause contacting with an obstacle nearby
Solution Approach 1:
The control device performs preliminary action by automatically determining avoiding movement and generating avoidance control instructions before the vehicle body can collide with obstacles due to inertia. When abnormality is detected, the system proactively changes the moving direction of work machinery components to safe positions, rather than waiting for the collision to occur or for operator reaction.
Solution Approach 2:
The control device implements feedback by continuously monitoring operation signals and abnormality conditions, then automatically adjusting the moving direction of work machinery components. The system receives feedback from abnormality detection and responds by generating avoidance control instructions that modify the vehicle body's movement trajectory to prevent collisions.
2Object-affected harmful factors
If automatic avoidance control is implemented, then collision risk is reduced even during abnormality, but device complexity increases
Solution Approach 1:
The control device performs self-service by autonomously determining avoiding movement and generating avoidance control instructions without requiring external intervention or complex additional hardware. The existing control device leverages its own computational capabilities to detect abnormalities, assess collision risks, and execute avoidance maneuvers, making the system self-sufficient in safety operations.
Solution Approach 2:
The control device achieves multi-functionality by combining abnormality detection, collision risk assessment, avoidance movement determination, and control instruction generation within a single integrated system. Rather than adding separate dedicated systems for each function, the control device performs multiple safety-related functions, reducing overall device complexity while maintaining comprehensive collision avoidance capability.
Data Source
AI summary
Provided are a work machine and a work machine system that reduce risk that a vehicle body comes into contact with an obstacle nearby in a case wherein abnormality arises in the work machine. The work machine comprises: a traveling body; a rotary body rotatably mounted onto the traveling body; a work machinery of an articulated type mounted to the rotary body and including a boom, an arm and a work tool; and a control device. The control device comprises a control instruction calculation section, a machine control section, an abnormality detection section, an avoiding movement necessity determination section and an avoidance control instruction section. The machine control section controls the traveling body, the rotary body and the work machinery putting priority on the avoidance control instruction over the operation control instruction.