Use the imagine sensor to detect the building vibration

The hydro-energetic building, the dam is a grate construction which requires permanent monitories of all physics parameter that affect his safety. One of this parameter is the structure vibration. The dam vibration is caused by the level water variation, temperature variation and by earthquake event. Because the inertia of building is big the vibration frequency is by Hz or mHz scale. This article is focus on a measurement method that use the image capture to determine the frequency and the intensity of vibration. To capture the imagine, is used a CMOS image linear sensor. The output of CMOS sensor is a video signal, for data acquisition is used a high frequency sampling ADC. To detect the vibration is attached by the building a wire and witch CMOS sensor is measured the wire position. Using a high frequency acquisition system can be measured also the vibration frequency. As a central unit of measurement system can be use a microcontroller, or a FPGA and the data can be send in real time to a PC where the human operator can observe the stage of building.