| 摘要 |
An embodiment of the present invention provides an apparatus for measuring concrete hardness, comprising: a piezoelectric sensor positioned in concrete; an input signal unit transmitting an input signal to the piezoelectric sensor; and an admittance measurement unit receiving an output signal from the piezoelectric sensor and measuring a slope of admittance of the output signal with respect to frequency of the input signal. Thereby, the present invention can reliably measure the concrete hardness in real time irrespective of a shape of a structure, a damage and mixing ratio of the concrete. In addition, embodiments of the present invention can be applied to a real industrial site at low costs and can promote systematization of construction and stability of the structure. |
