Excavation data processing method, excavation data processing device, and excavator for trench

An excavation data processing device, which acquires data output from an excavator for a trench that, while excavating a trench underground by moving, in a lateral direction, an excavating body being partly buried underground, forms a wall underground corresponding to the trench, the excavating body having a vertically long post portion extending in an up-down direction and having an endless excavating chain supported by the post portion so as to surround the post portion in the up-down direction and the lateral direction and rotating along a periphery of the post portion, and which derives information related to a shape of the trench in order to excavate a part adjacent to one wall surface of the wall extending in the lateral direction, down to a predetermined excavation bottom positioned between an upper end portion and a lower end portion of the wall, the excavation data processing device comprising:

• a first acquisition portion which acquires reference part position data as data related to a relative position of a reference part of the excavating body with respect to an origin on a ground surface, the reference part being arranged above the ground;
• data of a plurality of measuring part positions as data related to a relative position of each of a plurality of measuring parts in the excavating body with respect to the reference part, the plurality of measuring parts being arranged underground at a space from each other in the up-down direction;
• and data indicative of an excavation depth as a depth from the ground surface to the excavation bottom underground;
• a second acquisition portion which acquires data of a plurality of inclination angles as data of an inclination angle of each of the plurality of measuring parts with respect to a vertical direction, the data being output from the excavator for a trench;
• a first deriving portion which derives a plurality of measurement positions as relative positions of the plurality of measuring parts with respect to the origin from the reference part position data and the plurality of measuring part positions data acquired by the first acquisition portion and the plurality of inclination angles data acquired by the second acquisition portion;
• a second deriving portion which derives an excavation bottom position as a relative position of a part of the excavating body with respect to the origin, the part intersecting a horizontal plane below the ground surface by the excavation depth, by interpolation processing based on the plurality of measurement positions derived by the first deriving portion and the excavation depth acquired by the first acquisition portion;
• and
• an output portion which outputs information of the excavation bottom position.