Endoscope Drive System Single-Terminal PWM Control
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Solution Overview
Problem
Existing endoscopic systems face challenges in precisely controlling the rotation direction and speed of a rotary cylinder power unit to advance and retreat the insertion section, requiring a simple yet precise drive circuit configuration.
Innovation Solution
A drive system comprising a control section, a drive section with a single output terminal using pulse width modulation, an operation information acquisition section, and a correction section to ensure consistency between control signals and operation status, allowing for accurate motor control with a reduced number of connection wires and eliminating the need for a minus power source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a drive circuit with multiple terminals and a minus power source is used to control bidirectional rotation, then the rotation control capability is improved, but the device complexity and cost increase
Solution Approach 1:
The invention extracts and eliminates the minus power source from the drive circuit, using only a single-power-source configuration. The motor achieves bidirectional rotation control through pulse width modulation applied to a single terminal, removing the need for complex multi-terminal circuits and negative voltage generation circuits.
Solution Approach 2:
The single output terminal of the control section serves multiple functions: it controls both the direction and speed of motor rotation through pulse width modulation. This single terminal replaces what would traditionally require multiple terminals for directional control and speed regulation.
2Measurement precision
If a complex drive circuit with multiple terminals is used, then the rotation precision is improved, but the manufacturing cost and ease of manufacture deteriorate
Solution Approach 1:
The invention removes unnecessary circuit components including the minus power source and additional control terminals, simplifying the overall circuit configuration. This reduction in component count directly lowers manufacturing costs while maintaining rotation precision through effective pulse width modulation control.
Solution Approach 2:
The invention replaces complex electrical circuit mechanisms with a simplified control approach using pulse width modulation on a single terminal. This substitution reduces the need for complex hardware while maintaining precise control capability through software/control signal management.
3Device complexity
If a simplified drive circuit with fewer terminals is used, then the device complexity is reduced, but the control precision may deteriorate
Solution Approach 1:
The invention changes the control parameter from multi-terminal voltage polarity switching to pulse width modulation on a single terminal. By varying the duty cycle of the PWM signal, the system maintains precise control over motor speed and direction while using a simplified single-terminal configuration.
Solution Approach 2:
The invention substitutes complex multi-terminal electrical control mechanisms with pulse width modulation technology. This allows precise control to be achieved through temporal signal variations rather than spatial circuit complexity, maintaining control precision while simplifying the physical circuit 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
Enables precise and efficient control of the endoscope's insertion section with a simplified circuit configuration, reducing costs and complexity while maintaining high response and linearity in speed control.
Implementation Method 1
a drive section which comprises a first terminal which outputs a first potential and a second terminal which outputs a second potential, in which the first potential and the second potential are based on the control signal
Data Source
AI summary
A control section outputs a control signal. An actuator is connected to a drive section and operates based on the control signal. An operation information acquisition section acquires operation information related to an operation status of the actuator. A storage section stores correction information included in control information which includes a relationship between an operation status and the control signal. The correction section determines whether or not the control signal and the operation status are consistent with the control information, and when inconsistent, corrects correction information for consistency.