Cable Tensiometer Using Gravity-Based Weight Position Sensing
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Solution Overview
Problem
Existing tensioned cable devices suffer from high installation and management costs, complex tension monitoring, frequent measurement errors, and increased risks due to expensive and imprecise tensiometers, which require laborious procedures and frequent checks.
Innovation Solution
A tensiometer with a weight constrained to the cable that rotates idly under gravity, using a detector and emitter system to measure tension variations, allowing for precise and quick monitoring with reduced installation complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If known tensiometers are installed to monitor cable tension, then tension monitoring capability is improved, but installation complexity and cost increase
Solution Approach 1:
The patent replaces complex mechanical tensiometers with a gravitational weight system. The weight (2) freely hangs from the cable and rotates under gravity, providing a simple mechanical indication of tension status without requiring complex installation procedures. This substitution resolves the contradiction by maintaining monitoring capability while dramatically reducing installation complexity.
Solution Approach 2:
The weight-based tensiometer is self-installing and self-monitoring. The weight automatically positions itself based on cable tension and rotates to indicate status changes without human intervention. The system serves itself by using the cable's own tension to drive the monitoring mechanism, eliminating the need for complex external installation while maintaining reliable monitoring capability.
2Reliability
If known tensiometers are used for cable tension monitoring, then tension detection is improved, but measurement precision deteriorates due to installation errors
Solution Approach 1:
The patent replaces precision mechanical tensiometers with a gravitational weight system that uses the cable's own tension to rotate the weight. This mechanical substitution eliminates installation errors because the weight naturally positions itself according to the cable's actual tension state, providing inherently accurate measurements without requiring precise installation procedures.
Solution Approach 2:
Instead of using a complex device to measure tension, the patent inverts the approach by allowing the tension itself to directly rotate the weight indicator. The system doesn't measure tension through complex mechanisms but rather allows tension to physically move the indicator, thereby inverting the measurement process to eliminate installation errors and improve precision.
3Reliability
If expensive tensiometers are deployed, then monitoring capability is improved, but cost increases
Solution Approach 1:
The patent employs a simple, inexpensive weight-based system instead of expensive tensiometers. The weight and indicator components are simple mechanical elements that can be manufactured at low cost, making the monitoring system economically viable while maintaining reliable tension detection capability throughout the cable's service life.
Solution Approach 2:
The patent substitutes expensive electronic or mechanical tensiometers with a simple gravitational weight system. By replacing complex, costly monitoring devices with basic mechanical components (weight, rotation indicator), the system achieves reliable monitoring capability at a fraction of the cost of conventional tensiometers.
4Reliability
If frequent tension checks are performed, then safety is improved, but time consumption and operational complexity increase
Solution Approach 1:
The weight-based tensiometer provides continuous visual indication of cable tension status through the rotation position of the weight. Instead of requiring periodic manual checks, the system continuously monitors and displays tension state, allowing operators to immediately identify when tension falls outside acceptable ranges, thereby improving safety while reducing time spent on monitoring.
Solution Approach 2:
The patent employs visual indicators (such as colored zones or markings on the rotation path) to indicate different tension states. This allows operators to quickly assess cable status at a glance without requiring detailed measurement or interpretation, significantly reducing monitoring time while maintaining high safety standards through continuous visual feedback.
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 quick tension monitoring with reduced costs, easy installation, and reliable detection of tension variations, ensuring operator safety and structural integrity.
Implementation Method 1
a weight (2) constrained to the cable (11) so as to allow the weight (2) to rotate idly with respect to the cable (11) under the action of its own weight
Implementation Method 2
a detector (4) configured to detect the position of the weight (2) with respect to the same detector (4), wherein the detector (4) comprises at least a transducer detecting an emission from an emitter (5) constrained integrally to the weight (2)
Data Source
Figure 2~3
Figure 3
AI summary
A tensiometer (1) for cables (11) is provided comprising a weight (2) constrained to the cable (11); a detector (4) physically separated from the weight (2) and from the cable (11) and configured to detect the distance between weight (2) and the same detector (4); and a control unit (6) configured to define the tension of said cable (11) depending upon said distance.