Time point acquisition method, time point acquisition device, time point acquisition system, and time point acquisition program

A time point acquisition device, comprising:

• a memory configured to store a program;
• and
• a processor configured to execute the program so as to:
• continuously acquire acceleration data detected by acceleration sensors, the acceleration sensors being installed at different positions along a superstructure of a bridge, the acceleration data corresponding to movement of a plurality of vehicles at the different positions as the plurality of vehicles move on the superstructure along with a formation moving vehicle;
• acquire time-series data indicating a time change of a displacement of the superstructure based on the continuously acquired acceleration data;
• remove a vibration component included in the time-series data;
• identify first data and second data of the time-series data, the first and second data sandwiching a threshold value, the threshold value corresponding to a deflection value generated by a front part of the formation moving vehicle entering onto the superstructure;
• and
• acquire an entry time point at which the formation moving vehicle enters the superstructure and an exit time point at which the formation moving vehicle exits from the superstructure based on the first and second data after the vibration component is removed therefrom.

A time point acquisition system comprising:

• acceleration sensors configured to continuously acquire acceleration data, the acceleration sensors being installed at different positions along a superstructure of a bridge, the acceleration data corresponding to movement of a plurality of vehicles at the different positions as the plurality of vehicles move on the superstructure along with a formation moving vehicle;
• and
• a time point acquisition device, the time point acquisition device including:
• a memory configured to store a program;
• and
• a processor configured to execute the program so as to:
• acquire time-series data indicating a time change of a displacement of the superstructure based on the continuously acquired acceleration data;
• remove a vibration component included in the time-series data;
• identify first data and second data of the time-series data, the first and second data sandwiching a threshold value, the threshold value corresponding to a deflection value generated by a front part of the formation moving vehicle entering onto the superstructure;
• and
• acquire an entry time point at which the formation moving vehicle enters the superstructure and an exit time point at which the formation moving vehicle exits from the superstructure based on the first and second data after the vibration component is removed therefrom.

A non-transitory computer-readable storage medium storing a program for causing a computer to execute a process by a processor so as to perform the steps of:

• continuously acquiring acceleration data detected by acceleration sensors, the acceleration sensors being installed at different positions along a superstructure of a bridge, the acceleration data corresponding to movement of a plurality of vehicles at the different positions as the plurality of vehicles move on the superstructure along with a formation moving vehicle;
• acquiring time-series data indicating a time change of a displacement of the superstructure based on the continuously acquired acceleration data;
• removing a vibration component included in the time-series data;
• identifying first data and second data of the time-series data, the first and second data sandwiching a threshold value, the threshold value corresponding to a deflection value generated by a front part of the formation moving vehicle entering onto the superstructure;
• and
• acquiring an entry time point at which the formation moving vehicle enters the superstructure and an exit time point at which the formation moving vehicle exits from the superstructure based on the first and second data after the vibration component is removed therefrom.