Robotic Surgical Instrument Control with Display Tilt Feedback

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Solution Overview

Problem

Existing robotic surgical systems face inaccuracies in translating surgical instruments due to changes in the display angle, causing the operator's intended direction of instrument movement to deviate from the desired path.

Innovation Solution

Incorporating a tilt detection sensor to correct the translational movement of surgical instruments based on the detected tilt of the display, ensuring accurate movement even when the display angle changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the display angle is adjusted to improve operator comfort, then the operator can view the surgical site more comfortably, but the direction of the surgical instrument movement becomes inaccurate

Engineering Contradiction:

Improveoperator comfortVSAvoidinstrument movement accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The system uses a tilt detection sensor to detect the display's tilt angle and feeds this information back to the control device. The control device then calculates the relationship between the display tilt and the operation unit direction, automatically correcting the instrument movement direction to maintain accuracy regardless of display angle adjustments.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system dynamically changes the parameter mapping between the operation unit and surgical instrument based on the detected display tilt angle. When the display tilt changes, the control device updates the directional correspondence parameters to compensate for the tilt, ensuring that instrument movement accuracy is maintained across different display angles.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If the display is made movable to allow angle adjustment, then operator comfort is improved, but the system complexity increases

Engineering Contradiction:

Improvedisplay adjustabilityVSAvoidsystem complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The system automatically compensates for display tilt effects without requiring manual intervention from the operator. The tilt detection sensor continuously monitors the display angle, and the control device automatically adjusts the instrument movement direction based on the detected tilt, making the compensation process transparent and self-service oriented.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system replaces complex mechanical linkage mechanisms that would physically connect the display position to the instrument control with an electronic sensing and computational approach. The tilt detection sensor and control algorithm substitute for mechanical coupling, reducing mechanical complexity while achieving the same functional result.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If tilt detection and correction functions are added, then instrument movement accuracy is improved, but the device complexity increases

Engineering Contradiction:

Improvemovement accuracyVSAvoidcontrol system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The control device performs multiple functions: it controls the surgical instrument movement, detects display tilt angle, calculates the tilt-instrument direction relationship, and automatically corrects movement directions. By integrating these functions into a single control device, the system avoids the need for separate dedicated components for each function, thereby reducing overall system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The tilt detection sensor acts as an intermediary between the display position and the instrument control system. Rather than requiring direct mechanical coupling or complex sensor arrays, a single tilt sensor provides the necessary intermediate measurement that the control device uses to calculate and correct the instrument direction, simplifying the overall system architecture.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Ensures that surgical instruments are accurately translated in the intended direction by the operator, despite changes in display tilt, enhancing precision and reliability in robotic surgical systems.

Implementation Method 1

a tilt detection sensor to detect a tilt of the display with respect to the horizontal plane

Methodology Applied

Scientific EffectTilt detection: Accelerometer

Data Source

PatentUS20250331702A1Robotic surgical system and control method for robotic surgical system

Publication Date: 2025.10.30 KAWASAKI JUKOGYO KK

AI summary

In a robotic surgical system, an operation apparatus includes a display to rotate so as to be tilted with respect to a horizontal plane, and a tilt detection sensor to detect a tilt of the display with respect to the horizontal plane. The control device is configured or programmed to correct translational movement of a predetermined surgical instrument based on the tilt detected by the tilt detection sensor.