STRENGTH SIGNAL MEASURING METHOD AND STRENGTH SIGNAL MEASURING DEVICE FOR MONITORING STRENGTH OF HYDRATION REACTION MATERIALS

摘要

The present invention relates to a concrete structure, which is a kind of structure made of a hydration reactant, because when vibration is applied by external factors, the speed transmitted from the inside of the material is different depending on the strength and elastic modulus, and the response characteristics according to the excitation frequency are different. It is possible to reliably monitor the strength of the structure by measuring the strength of the structure and the ground. An object thereof is to provide a strength signal measurement method and a strength signal measurement device for strength monitoring. According to the present invention, an AC electric signal generating step of generating an AC electric signal of a specific waveform having a frequency of a predetermined frequency band; An AC electric signal applying step of applying the generated AC electric signal to the piezoelectric element for a predetermined period of time; A frequency-impedance detection step of detecting a change in the resonance frequency and impedance of the piezoelectric element according to the frequency of the AC electrical signal applied in the AC electrical signal applying step; And a pressure change measuring step of measuring a change in a physical pressure applied to the piezoelectric element as an intensity signal based on a change in the detected resonance frequency and impedance of the piezoelectric element. A method of measuring intensity signals for monitoring is provided.