Shovel Controller Automatic Braking Deactivation
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Solution Overview
Problem
Operators of conventional shovels face inconvenience as they need to manually deactivate the restricted movement state by separating their hand from the operation lever and pushing a software button, leading to a cumbersome process.
Innovation Solution
A shovel equipped with an object detection device and a controller that automatically brakes the drive unit when an object is detected and allows automatic deactivation of the braking if the operator intends to continue operation, enabling easier deactivation of the restricted movement state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shovel automatically brakes the drive unit when an object is detected, then safety is improved, but the ease of operation deteriorates because the operator must manually deactivate the braking by separating hand from operation lever and pushing a software button
Solution Approach 1:
The system automatically detects operator intention through operation lever signals and self-deactivates the braking without requiring manual button pressing. The controller monitors operation lever signals during braking execution and automatically deactivates braking when continued operation is detected, allowing the system to serve itself rather than requiring operator intervention.
Solution Approach 2:
The controller continuously monitors operation lever signals as feedback during braking execution. When the operation lever signal indicates continued operation intention, the controller uses this feedback to automatically deactivate the braking, creating a closed-loop control system that responds to operator input in real-time.
2Reliability
If the shovel requires manual deactivation through software button, then the risk of erroneous deactivation is reduced, but the productivity deteriorates due to the cumbersome deactivation process
Solution Approach 1:
The system automatically deactivates braking by monitoring operation lever signals and self-executing the deactivation process without requiring operator hand movement to a software button. This self-service mechanism maintains reliability through controlled automatic deactivation while significantly improving productivity by eliminating the cumbersome manual deactivation process.
Solution Approach 2:
The system replaces the manual mechanical action of pressing a software button with an automatic electronic control mechanism. The controller detects operation lever signals and automatically executes braking deactivation, substituting the manual button-pressing operation with an automated electronic response that improves work efficiency while maintaining controlled deactivation.
Data Source
AI summary
A shovel (100) according to an embodiment of the present invention includes a lower travelling body (1), an upper pivot body (3) pivotably mounted to the lower travelling body (1), an object detection device (70) provided to the upper pivot body (3), and a controller (30) that brakes a drive unit of the shovel. The controller (30) is configured to, when the object detection device (70) detects an object, automatically brake the drive unit. The controller is configured to, upon determining that an operator has an intention to continue operation during execution of the braking, deactivate the braking.