2011 Volume 67 Issue 2 Pages I_885-I_893
The acceleration sensors which adopt the MEMS (Micro Electro Mechanical System) technology, offer high reliability and sensitivity in a small size. Using the MEMS sensor, we develop a visualization system of vibration of a civil structure at a low cost. In our system, time series of acceleration data measured at multiple points are transmitted to a computer at base-station with the wireless LAN and then converted to displacement data by the linear acceleration method. Here we make a digital filter to avoid a drift of the baseline of displacement data and to eliminate the white noise. First, our measurement setup and data conversion from acceleration to displacement using digital filters are described. Next we show an animation of vibration of a connecting bridge between two buildings by means of triaxial displacement data.
