Strain measurement method and multi-point strain measurement system

摘要

PROBLEM TO BE SOLVED: To provide a strain measuring method capable of measuring a strain so as to exert no effect of the resistance of the lead wire connected to a strain gauge on a measured value.;SOLUTION: The strain measuring method has a step for bonding the strain gauge with a gauge ratio K to an object and allowing a current to flow to the strain gauge through the current supply lead wire connected to the strain gauge, a step for extracting the voltage generated in the strain gauge through a voltage extraction lead wire connected to the strain gauge in an initial state becoming the measuring standard of strain at the time of measurement of the strain of the matter, and a strain calculating step for calculating a value represented by formula (1): ε=(1/K) (C_ε/C₀-1) (wherein C_ε is the resistance ratio of the strain gauge to the standard resistance body at the time of measurement of strain, and C₀ is the resistance ratio of the strain gauge to the standard resistance body in the initial state) as a strain measured value ε.;COPYRIGHT: (C)2004,JPO