Information collaboration system

An information collaboration system, comprising:

• an on-board device mountable on a movable object;
• and
• a mobile terminal configured to communicate with the on-board device,
• wherein the on-board device includes
• a sensor device configured to detect at least one sensor detection value selected from the group consisting of a speed, an angular velocity, and an acceleration of the movable object, and
• an on-board communication unit configured to transmit, to the mobile terminal, sensor information including the at least one sensor detection value and a detection time at which the at least one sensor detection value is detected,
• the mobile terminal includes
• a terminal communication unit configured to receive the sensor information from the on-board communication unit,
• an information synchronizer configured to synchronize positioning information obtained by a positioning information obtaining unit with the sensor information when a time difference between a time at which positional information included in the positioning information is obtained and the detection time is equal to or less than a predetermined value, and
• a movable-object position estimation unit configured to estimate a position of the movable object based on the positioning information and the sensor information synchronized with each other by the information synchronizer, and
• the positioning information obtaining unit is included in the on-board device and/or in the mobile terminal.