Tension measurement method, tension measurement system, and tension reduction method

A method and system for measuring and reducing cable tension on two supports by calculating elongation-based tension using a simple configuration, addressing complexity and attenuation issues in existing methods, ensuring accurate and efficient cable installation.

WO2026120800A1 Publication Date: 2026-06-11NT T INC
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Patent Information

Application Number
PCT/JP2024/043252
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-06
Publication Date
2026-06-11

AI Technical Summary

Technical Problem

Existing methods for measuring cable tension on two supports are complex and difficult to implement due to the need for high-frequency signal generators and attenuations in the middle of the cable, making it challenging to accurately measure tension and requiring a complicated setup.

Method used

A method and system that measure cable tension by calculating the actual length, sag, and tension relative to elongation at the central point using a simple configuration, involving a tension measuring device with a contact portion, load measuring portion, and elongation measuring portion, and a tension calculation device.

Benefits of technology

Enables accurate tension measurement and reduction of cable tension with a simple setup, allowing for safe and efficient cable installation by determining the center point and calculating tension based on elongation, reducing complexity and cost.

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Abstract

Disclosed herein is a tension measurement method wherein: the actual length of a cable attached to two support bodies is calculated from a load measured at a center point of the cable and the unit weight of the cable; the degree of slack of the cable is calculated from the calculated actual length and the span length of the two support bodies; and the tension of the cable on the support bodies with respect to the amount of extension when the center point of the cable is pushed up from the lowest point at the center point is calculated from relationships between the calculated actual length of the cable, the unit weight, the span length, the calculated degree of slack, the amount of extension, and the tension of the cable on the support bodies.
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