Phaco Driver Bridge Unit for Compact Dual-Frequency Control
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Solution Overview
Problem
Existing phaco driver systems for ophthalmic surgical phacoemulsification devices are complex, requiring multiple components and high power consumption, which limits their compactness and efficiency in controlling dual frequency operations for different cutting modalities.
Innovation Solution
A phaco driver system utilizing a bridge unit to generate a bridge output signal as a sum of two harmonic input signals with selectable frequency components, controlled by a control unit to achieve dual frequency operation with a reduced component count, enabling a more compact configuration and lower power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple driver modules are used to control dual frequency operation, then the system can support different cutting modalities, but the device complexity and number of components increase
Solution Approach 1:
The patent combines multiple driver modules into a single integrated driver module that can generate both first and second frequency signals. The bridge unit is configured to receive both frequency signals from one driver module and generate the appropriate bridge output signal, eliminating the need for separate driver modules for each frequency while maintaining the ability to support different cutting modalities.
Solution Approach 2:
The single driver module is designed to perform multiple functions by generating both first frequency signals and second frequency signals. This universal driver module can control the ultrasonic transducer for various cutting modalities (longitudinal, transverse, torsional) by selectively generating different frequency combinations, replacing what would traditionally require multiple specialized driver modules.
2Adaptability or versatility
If multiple driver modules are used to control dual frequency operation, then the system can support different cutting modalities, but the power consumption increases
Solution Approach 1:
By merging multiple driver modules into one, the patent reduces the total power consumption. The single driver module consumes less power than multiple separate modules would require, while the bridge unit efficiently processes both frequency signals to generate the appropriate output for different cutting modalities without requiring additional power-intensive components.
3Device complexity
If a single bridge unit is used to generate dual frequency output, then the hardware complexity is reduced, but the control precision for frequency components may be compromised
Solution Approach 1:
The control unit monitors the bridge output signal and adjusts the first and second frequency signals accordingly to maintain precise frequency control. This feedback mechanism ensures that even though a single bridge unit is used, the frequency components remain accurately controlled for different cutting modalities.
Solution Approach 2:
The system dynamically adjusts the frequency signals based on the required cutting modality. The control unit can selectively generate and combine first and second frequency signals in real-time, allowing the single bridge unit to adapt to different frequency requirements while maintaining precision through dynamic control rather than static hardware configuration.
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
The system allows for efficient control of dual frequency operations with reduced hardware complexity and power consumption, facilitating a more compact design while supporting various cutting modalities like longitudinal, transverse, and torsional motions.
Implementation Method 1
the bridge output signal being based on a sum of a first input signal and a second input signal
Implementation Method 2
the first signal is a harmonic signal having a first frequency and wherein the second signal is a harmonic signal having a second frequency
Implementation Method 3
an ultrasonic transducer operatively connected to a needle having a cutting tip which is vibrated at ultrasonic frequencies to disintegrate cataractic tissue in the eye
Implementation Method 4
a first piezo for performing a longitudinal movement, and a second piezo for performing a transverse or torsional movement
Implementation Method 5
a single piezo contacting two mechanical resonance parts tuned to different frequencies
Data Source
AI summary
A phaco driver system is for controlling a dual frequency operation of an ophthalmic surgical phacoemulsification device. The phaco driver system includes a bridge unit generating a bridge output signal for driving an ultrasonic transducer of the ophthalmic surgical phacoemulsification device. The bridge output signal is a block signal based on a sum of a first input signal having a first frequency and a second input signal having a second frequency. The phaco driver system also includes a control unit setting parameters of the first input signal and parameters of the second input signal such that the bridge output signal includes a first component having the first frequency and a second component having the second frequency, the first and the second component having a selectable output ratio.