Displacement detecting device for structural object, sharing system of displacement of structural object, and method and program of detecting displacement of structural object

A displacement detecting device for a structural object, comprising:

• a first attitude data calculator:
• disposed with two first antennas at a first position of the structural object,
• configured to calculate a first base line vector between the two first antennas by using received positioning signals,
• configured to calculate first attitude data of the first position based on an angle formed by three perpendicular axes in an absolute coordinate system and the first base line vector, and
• configured to acquire a time point of the first attitude data of the first position based on a time of a positioning system;
• a second attitude data calculator:
• disposed with two second antennas at a second position of the structural object,
• configured to calculate a second base line vector between the two second antennas by using received positioning signals,
• configured to calculate second attitude data of the second position based on an angle formed by the three perpendicular axes in an absolute coordinate system and the second base line vector, and
• configured to acquire a time point of the second attitude data of the second position based on the time of the positioning system;
• a data extractor:
• configured to compare the time point of the first attitude data and the time point of the second attitude data and determine that they are the same, and
• configured to extract the first attitude data and the second attitude data based on the comparison;
• and
• a displacement calculator configured to calculate a displacement amount and a displacement direction of the structural object by using a difference between the first attitude data and the second attitude data.