Multifunctional Input Device for Robot Arm Mode Control
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Solution Overview
Problem
Existing robot arms face challenges in mode operation control, particularly in accurately setting payload information and safely transitioning between modes, often requiring multiple input devices and complex sequences that can lead to accidental mode changes.
Innovation Solution
A mechanical multifunctional input device with predetermined activation sequences allows users to safely change between modes, such as stop and free-drive, using a single input device with defined steps to prevent accidental mode changes and simplify operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple input devices are used for mode control, then mode transition safety is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple input devices into a single multifunctional input device that can perform various mode transition functions. This single device integrates the safety functions previously requiring multiple separate devices, thereby reducing overall device complexity while maintaining mode transition safety through its multifunctional design.
Solution Approach 2:
The input device is designed with universal functionality to handle multiple mode transitions and control operations. By making the input device multifunctional, the system achieves reliable mode control without requiring multiple specialized input devices, thus resolving the contradiction between safety and complexity.
2Reliability
If complex activation sequences are implemented, then accidental mode changes are prevented, but ease of operation deteriorates
Solution Approach 1:
The activation sequence is designed to be dynamic rather than static - the required activation pattern adapts based on the current robot state and mode. This allows the system to maintain safety through sequence verification while keeping the operation simple for users, as the complexity is managed dynamically by the control system rather than requiring complex manual procedures.
Solution Approach 2:
The system implements feedback mechanisms that monitor the activation sequence and provide real-time information to the user about the current state and required actions. This feedback loop ensures accidental mode changes are prevented through verification while guiding users through simple, intuitive activation procedures, thus resolving the contradiction between safety and ease of operation.
3Reliability
If multiple input devices are required for mode control, then mode transition safety is improved, but ease of operation deteriorates
Solution Approach 1:
The patent merges multiple input devices into a single multifunctional input device that consolidates all mode control functions. This integration improves ease of operation by reducing the number of physical devices the user must handle, while maintaining safety through the device's ability to perform multiple verified functions within a unified interface.
Solution Approach 2:
The single input device is designed with universal capabilities to perform all mode transition operations that previously required multiple specialized devices. This multifunctionality makes operation more convenient by providing all controls in one location, while safety is maintained through the device's programmed verification mechanisms.
Data Source
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AI summary
The invention relates to a robot arm comprising a plurality of robot joints mechanically connecting a robot base to a robot tool flange wherein a robot controller is configured for controlling movement of said plurality of robot joints and thereby movement of said robot tool flange. The robot controller is connected to an interface device comprising an input device via which a user is able to communicate with said robot controller and thereby change mode of operation of the robot arm. The input device is a mechanical multifunctional input device and in response to a first predetermined sequence of activation applied to the input device, the robot controller is arranged to change mode of operation to a stop mode, and in response to a second predetermined sequence of activation applied to the input device, the robot controller is arranged to change mode of operation to a second mode of operation.