Surgical Sensor Control for Noise Reduction
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Solution Overview
Problem
Existing surgical instruments with energy supply, such as high-frequency surgical instruments, face challenges in minimizing noise interference and optimizing sensor output during energy fluctuations, particularly with rectangular wave energy supply.
Innovation Solution
A surgical apparatus with an energy supply unit, a sensor to detect the states of the instrument, and a control unit that manages the sensor's operation based on energy changes, specifically driving the sensor during stable energy periods and adjusting its timing to avoid noise interference during rising and falling energy transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is driven continuously to obtain surgical instrument information, then the measurement precision is improved, but noise interference increases during energy transitions
Solution Approach 1:
The sensor is driven periodically rather than continuously, with specific driving periods defined by the energy supply cycle. The control unit activates the sensor during stable energy periods (when energy is being supplied) and deactivates it during transition periods (when energy is not being supplied or is fluctuating), thereby obtaining measurements during stable conditions while avoiding noise interference during transitions
Solution Approach 2:
The control unit receives feedback from the energy change detector about the current energy supply state and adjusts the sensor driving accordingly. When the energy supply is stable, the sensor is activated; when energy transitions occur, the sensor is deactivated. This feedback mechanism ensures the sensor operates only under optimal conditions, minimizing noise while maintaining measurement accuracy
2Adaptability or versatility
If the sensor is driven during energy transitions to capture state changes, then the adaptability is improved, but noise interference increases
Solution Approach 1:
The control unit preliminarily determines the energy supply state through the energy change detector before activating the sensor. By detecting energy transitions in advance and using this information to control sensor timing, the system prepares to capture energy state changes at appropriate moments when noise is minimal, thereby maintaining adaptability while reducing noise interference
3Measurement precision
If the sensor driving is optimized for stable energy periods, then the measurement precision is improved, but the duration of data acquisition is reduced
Solution Approach 1:
The sensor is activated during the majority of the energy supply cycle when energy is stable, maximizing the duration of useful measurement action. The brief deactivation periods during energy transitions do not significantly reduce the overall data acquisition duration while substantially improving measurement precision, as the sensor operates continuously during the stable energy periods when most surgical operations occur
Data Source
AI summary
A surgical apparatus has a surgical instrument to treat a diseased part of a patient. An energy supply unit supplies energy for driving the surgical instrument. A sensor obtains information about states of the surgical instrument. An energy change detector detects whether magnitude of energy supplied to the surgical instrument is changed or not. A control unit controls driving of the sensor, based on a result of detection by the energy change detector.