Earth moving machine, range finder arrangement and method for 3D scanning

A range finder arrangement of an earth-moving machine, the arrangement comprising:

• at least one range finder device for providing scanning data comprising point cloud of at least one detected object;
• means for determining 3D position and orientation of the arrangement;
• and
• at least one control unit configured to receive the detected data and process the received data,
• wherein the range finder device is a solid-state device without internal movable mechanical elements, whereby the device is without internal scanning equipment,
• the range finder device is arranged on the movable machine element and is configured to be moved together with the movable machine element,
• the range finder device is configured to generate the point cloud based on time-of-flight of signals transmitted by a transmitting unit and reflecting signals received by a receiving unit comprising at least one detector, and
• the control unit is configured to determine 3D position and orientation of the range finder device and to provide the point cloud with 3D coordinates in response to the input data.

A method for 3D scanning at a work site of an earth moving machine, wherein the earth moving machine comprises a carrier and at least one machine element movable relative to the carrier,

• the method comprising:
• producing scanning data of the surrounding of the earth moving machine by means of at least one range finder device arranged on the earth moving machine, wherein the scanned data comprises at least one point cloud of at least object detected in a field of the range finder device;
• determining 3D position and orientation data of the earth moving machine at the work site;
• inputting the produced scanned data and the determined position and orientation data to at least one control unit and calculating three-dimensional coordinates for the at least one target point of the produced scanned data;
• executing the scanning by means of at least one range finder device being a solid-state device without internal movable mechanical elements and provided with a limited angle of view;
• expanding the angle of view of the at least one range finder device being arranged on the movable machine element by moving the range finder device by means of the movable machine element;
• determining distance between the range finder device and at least one object by means of time of flight measurement, and inputting the data to the control unit;
• determining 3D position and orientation of the range finder device, and inputting the data to the control unit;
• and
• calculating three-dimensional coordinates for the point cloud in response to the input data.