Vibration isolation ditch dynamic monitoring device based on difference spectral analysis

The utility model belongs to the technical field of engineering structure's vibration isolation, a vibration isolation ditch dynamic monitoring device based on difference spectral analysis is related to. The device has constructed linearly independence's the poor response of two sets of displacements between two steel sheets: the poor response of poor response of direct displacement and compound displacement, what foil gage a gathered is the poor response of direct displacement, its reaction be the direct difference of displacement response around the vibration isolation ditch, what foil gage b gathered is the poor response of compound displacement, its reaction be the difference of the displacement response homogeneity gage block displacement response of vibration isolation ditch front side, quality piece displacement response forms after vibration isolation ditch rear side displacement response acts on the spring -mass part, data analysis processor carries out spectrum analysis to the poor response of two kinds of displacements, confirms that every frequency component is in vibration isolation ditch fore -and -after frequency domain characteristic, the typewriter ribbon display shows the frequency domain characteristic that obtains in real time, shows with different colours the frequency component who is in in the 0 -50Hz, the damping effect characteristic of maring the vibration isolation ditch.