Winch Position Control Using Wire Length Measurement
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Solution Overview
Problem
Conventional winch control systems require access to design data or external positioning devices to determine the relative positions of winches, which is impractical and inefficient for moving objects suspended by wires.
Innovation Solution
A winch control system that includes a distance measurement unit to calculate the winch-to-winch distance, a relative position determination unit to determine the position of secondary winches relative to primary winches, and a winch control unit to control the unwinding and winding of wires based on calculated lengths, allowing for precise movement of objects without relying on design data or external positioning devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If design data or external positioning devices are used to determine winch positions, then position information accuracy is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The winch control system uses its own wire length measurement capabilities to determine winch positions, eliminating the need for external positioning devices. The system measures the length of wires from each winch to the suspended object and uses these measurements to calculate relative winch positions, making the system self-sufficient and reducing external dependencies.
Solution Approach 2:
The wire length measurement function, originally designed for controlling object position, is also used to determine winch positions. This multi-functional use of the measurement capability eliminates the need for separate positioning devices and simplifies the overall system while maintaining measurement accuracy.
2Measurement precision
If design data or external positioning devices are used to determine winch positions, then position information accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The system automatically determines winch positions using its own wire length measurements without requiring users to access design data or operate external positioning devices. This automated self-determination simplifies user operation while maintaining accurate position information.
Solution Approach 2:
The system performs preliminary wire length measurements and automatically calculates winch positions before actual object movement operations. This preliminary determination of winch positions eliminates the need for users to manually obtain or input position data, streamlining the operation process.
3Device complexity
If wire length measurements are used to determine winch positions, then device complexity is reduced, but measurement precision may deteriorate
Solution Approach 1:
The system replaces mechanical or optical external positioning devices with a calculation-based approach using wire length measurements. By substituting physical positioning hardware with computational methods that process wire length data, the system reduces device complexity while maintaining position determination accuracy through mathematical calculations.
Solution Approach 2:
The wire length measurements serve as an intermediary parameter to indirectly determine winch positions. Instead of directly measuring winch positions with external devices, the system uses wire lengths as a mediator to calculate relative winch positions, achieving accurate position information through indirect measurement and calculation.
Data Source
AI summary
A winch control system includes: a distance measurement unit that measures a winch-to-winch distance between first and second winches based on the wound length of a second wire or the unwound length of a first wire when an object suspended through the first wire from the first winch and suspended through the second wire from the second winch is moved from the first winch to the second winch; and a relative position determination unit that determines the relative position of the second winch with respect to the first winch based on the winch-to-winch distance. The length of the first wire unwound from the first winch and the length of the second wire unwound from the second winch are calculated based on the relative position of the second winch with respect to the first winch and the target position of the object.