Bridge expansion joint impact monitoring system

The utility model relates to the technical field of bridge monitoring, and discloses a bridge expansion joint impact monitoring system which comprises an acquisition subsystem and a monitoring subsystem. The acquisition subsystem comprises an acceleration sensor and a data acquisition device electrically connected with the acceleration sensor; the data acquisition device is in signal connection with the monitoring subsystem; the monitoring subsystem comprises an analysis module, and the analysis module is used for receiving the information transmitted by the data acquisition device, analyzing the information to obtain the impact displacement of the expansion joint, and calculating the impact dynamic stress by combining the density of the bridge; and the acceleration sensor is embedded under the bridge floor and is positioned at the anchoring area of the expansion joint. According to the utility model, the impact state of the expansion joint can be monitored in a targeted manner when a vehicle passes through t