Excavator Controller Terrain Feedback Stability
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Solution Overview
Problem
Excavators equipped with measuring devices that capture terrain data through stereo images struggle to prevent instability due to operators mistakenly moving the lower traveling body in the wrong direction, as these systems cannot halt movement when obstacles like holes are detected, leading to potential accidents.
Innovation Solution
An excavator with a controller that restricts the lower traveling body's movement based on terrain information around the upper turning body, using a combination of GNSS, orientation detecting devices, and hydraulic systems to prevent forward or backward movement when obstacles are detected within a predetermined distance, thereby maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a measuring device with stereo cameras is mounted on the upper turning body to capture terrain data, then terrain information can be displayed in real time, but the system cannot prevent the lower traveling body from moving in the wrong direction when operators make mistakes
Solution Approach 1:
The controller receives terrain information from the measuring device and uses this feedback to automatically control the travel drive device, restricting movement when holes or embankments are detected in the surrounding terrain
Solution Approach 2:
The controller acts as an intermediary between the measuring device and the travel drive device, processing terrain information and automatically intervening to restrict movement when safety risks are detected, preventing direct operator control from causing accidents
2Reliability
If the controller automatically restricts movement based on terrain data, then safety is improved, but the device complexity increases due to integration of multiple systems
Solution Approach 1:
The controller is designed to perform multiple functions: it not only controls the travel drive device but also processes terrain information from the measuring device and makes automatic safety decisions, consolidating multiple functions into a single control unit to manage complexity
Solution Approach 2:
The measuring device, controller, and travel drive device are merged into an integrated system where the controller centrally coordinates terrain data acquisition and movement control functions, reducing overall system complexity through unified management
Data Source
AI summary
An excavator according to an embodiment of the present invention includes a lower traveling body, an upper turning body with an attachment mounted on the lower traveling body, and a controller installed in the upper turning body. The controller is configured to restrict movement of the lower traveling body based on information about terrain around the upper traveling body.