| 摘要 |
PURPOSE:To automate measuring operation, by computing and memorizing the periodicity of output electric signals from a strain gage and a comparator and the length of the chord of the strain gage from the length of the chord of the comparator, and computing the temporal change of the results. CONSTITUTION:One of strain gages 4 is selected by a control circuit 20, and a vibration starting signal is made to be sent to the selected strain gage 4 from a vibration starting device 8. A chord 2 of the strain gage 4 performs damped vibration. An AC voltage signal, which is induced in a coil 5, is outputted. Said original signal is compared with a reference signal, which is obtained by vibrating a comparator 22, and the length of the chord of the strain gage 4 is computed by a chord length measuring circuit 21. The measured and computed value of the length of the chord of each strain gage 4 is stored in a processing circuit 27. Based on the temporal change of said measured values, the amount of the strain of deformation of an architectural structure and the like to be measured is computed. |
