Surgical Robotic Arm Docking Interface With Auto-Latching Feedback
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Solution Overview
Problem
The existing methods for docking a surgical robotic arm to a cannula are cumbersome and require manual alignment, often limited by cannula latch position and arm geometry, lacking clear feedback on successful attachment.
Innovation Solution
An improved docking interface with automatic state detection and feedback mechanisms, including visual, tactile, and audio cues, ensures secure attachment of the robotic arm to the cannula, utilizing sensors and a finite state machine for precise alignment and latching, with features like over-center latching and adjustable force settings to enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual alignment method is used for docking robotic arm to cannula, then the docking process is simple in structure, but the ease of operation deteriorates due to limited user access and lack of feedback
Solution Approach 1:
The patent implements multiple feedback mechanisms including visual feedback (LED indicators showing docked/docking/not docked states), tactile feedback (audible clicks during latching), and auditory feedback (sounds indicating successful attachment). This resolves the contradiction by providing comprehensive user feedback without requiring complex manual alignment procedures, as the system automatically guides the docking process through these feedback signals.
Solution Approach 2:
The docking system performs self-alignment through automatic state detection using sensors that identify when the robotic arm is properly positioned relative to the cannula. The finite state machine automatically transitions through docking states without requiring precise manual intervention, allowing the system to service itself during the alignment process while maintaining operational simplicity.
2Measurement precision
If automatic state detection is implemented, then the measurement precision of docking alignment is improved, but the device complexity increases due to additional sensors and control systems
Solution Approach 1:
The patent replaces complex mechanical alignment mechanisms with sensor-based detection systems. Instead of using intricate mechanical guides and manual positioning devices, the system employs sensors to detect the relative position and orientation of the robotic arm and cannula, transitioning from mechanical precision to electronic sensing for achieving accurate docking alignment.
Solution Approach 2:
The sensor system serves multiple functions simultaneously: it detects alignment status, triggers state transitions in the finite state machine, activates appropriate feedback signals, and confirms successful docking. This multi-functionality reduces the need for separate detection and control mechanisms, thereby limiting the increase in device complexity while maintaining high measurement precision.
3Reliability
If multiple feedback mechanisms are added, then the reliability of docking confirmation is improved, but the device complexity increases
Solution Approach 1:
The patent combines visual, tactile, and auditory feedback mechanisms into an integrated notification system that works together to confirm successful docking. Rather than treating these as separate complex subsystems, they are merged into a unified feedback architecture controlled by the finite state machine, where multiple feedback types reinforce each other to provide reliable docking confirmation without proportionally increasing overall system complexity.
Data Source
AI summary
An apparatus for attaching a cannula to a robotic surgical system, the apparatus comprising: a first clamp component configured to transition between an open position and a closed position; a second clamp component spaced from the first clamp component, the first and second clamp components defining a region configured to receive a portion of the cannula and configured to retain the portion of the cannula in the region when the first clamp component is in the closed position; and a locking component configured to lock the first clamp component in the open position and allow the first clamp component to automatically transition to the closed position based on a position of the portion of the cannula within the region.


