VIBRATION DETECTION SYSTEM, SIGNAL PROCESSING DEVICE, AND SIGNAL PROCESSING METHOD

摘要

This vibration detection system (S) is provided with: a seismic source device (50) that generates a vibration wave that is repeated in a predetermined cycle; a vibration reception device (60) that receives a response wave that is on the basis of the vibration wave transmitted through a substrate; and a signal processing device (1) that processes the measured vibration signal received by the vibration reception device (60). The signal processing device (1) is provided with: an isolation unit (41) that isolates, from the measured vibration signal, an individual cycle signal having a cycle in accordance with the cyclic properties of the vibration wave generated by the seismic source device (50); a calculation unit (42) that calculates a standard cycle signal from the isolated individual cycle signal; and a generation unit (43) that generates a difference signal by subtracting the standard cycle signal from the measured vibration signal.