Bridge structure damage information acquisition device based on piezoelectric detector

The utility model discloses a bridge structure damage information acquisition device based on a piezoelectric detector. The system comprises a seismic wave receiving sensor, the signal output end of the seismic wave receiving sensor is connected with the signal input end of a front-end conditioning circuit, the signal output end of the front-end conditioning circuit is connected with the signal input end of a data acquisition module, and the signal output end of the data acquisition module is connected with the signal input end of an upper computer; the seismic wave receiving sensor collects internal reflected waves of the bridge through the bridge under external excitation; the seismic wave receiving sensor collects internal reflection waves of a bridge under external excitation and converts the internal reflection waves into electric signals, the electric signals are subjected to amplification, filtering, overcurrent and overvoltage protection through the front-end conditioning circuit, and analog signals a