Based upon the identification of a structural member, a projective path and final attachment location for the structural member is presented to the crane operator. Further, the dimensions of each structural member are determined and compared against a construction site database. Structural members not conforming to the dimensions listed in the construction site database are identified and the crane operator alerted.

Based upon the identification of a structural member, a projective path and final attachment location for the structural member is presented to the crane operator. Further, the dimensions of each structural member are determined and compared against a construction site database. Structural members not conforming to the dimensions listed in the construction site database are identified and the crane operator alerted.

A suspended load calculation device includes a detection unit configured to detect information for specifying a load suspended by a crane, a calculation unit configured to calculate the suspended load based on a value detected by the detection unit, and an acquisition unit configured to acquire a boom length, in which the calculation unit corrects the suspended load by a correction value corresponding to the boom length acquired by the acquisition unit.

A suspended load calculation device includes a detection unit configured to detect information for specifying a load suspended by a crane, a calculation unit configured to calculate the suspended load based on a value detected by the detection unit, and an acquisition unit configured to acquire a boom length, in which the calculation unit corrects the suspended load by a correction value corresponding to the boom length acquired by the acquisition unit.

One variation for a system for tracking lifting events at a construction site includes: a chassis configured to couple to a crane block of a crane at a construction site. The system further includes a first idler assembly including a first cable idler, a first idler arm, and a first position sensor coupled to the first idler arm. The first idler arm supports the first cable idler on a first side of the chassis and biases the first cable idler inwardly toward a first cable loop coupled to the crane block. Additionally, the system includes a controller configured to, during a lift event: read a first position value from the first position sensor; predict a weight of the load carried by the crane block based on the first position value; and generate a lift event record containing the weight of the load carried by the crane block.

One variation for a system for tracking lifting events at a construction site includes: a chassis configured to couple to a crane block of a crane at a construction site. The system further includes a first idler assembly including a first cable idler, a first idler arm, and a first position sensor coupled to the first idler arm. The first idler arm supports the first cable idler on a first side of the chassis and biases the first cable idler inwardly toward a first cable loop coupled to the crane block. Additionally, the system includes a controller configured to, during a lift event: read a first position value from the first position sensor; predict a weight of the load carried by the crane block based on the first position value; and generate a lift event record containing the weight of the load carried by the crane block.

The invention relates to a rotator (100) for a tool (200). The rotator (100) comprises a stator (102) and a rotor (104) rotatably arranged inside the stator (102). The rotor (104) comprises a radial bearing (122) having a first axial extension (a1) in the rotator (100). The rotator (100) comprises a separate bearing (112) arranged radially outside the rotor (104). The separate bearing (112) is configured to carry an external load of the rotator (100). The rotator (100) further comprises an electrical swivel (108) and/or an angle meter (116) arranged inside the rotor (102), and the electrical swivel (108) and/or the angle meter (116) at least partially extends axially in the first axial extension (a1) in the rotator (100). Thereby, a compact rotator design is provided.

The invention relates to a rotator (100) for a tool (200). The rotator (100) comprises a stator (102) and a rotor (104) rotatably arranged inside the stator (102). The rotor (104) comprises a radial bearing (122) having a first axial extension (a1) in the rotator (100). The rotator (100) comprises a separate bearing (112) arranged radially outside the rotor (104). The separate bearing (112) is configured to carry an external load of the rotator (100). The rotator (100) further comprises an electrical swivel (108) and/or an angle meter (116) arranged inside the rotor (102), and the electrical swivel (108) and/or the angle meter (116) at least partially extends axially in the first axial extension (a1) in the rotator (100). Thereby, a compact rotator design is provided.

The invention relates to a method of monitoring the safety of a crane, in particular of a revolving tower crane having a revolving deck, wherein the crane has a sensor system and a crane control, and wherein furthermore at least one tilt sensor is provided. In accordance with the invention, the at least one tilt sensor is attached to the revolving deck of the revolving tower crane, with the monitoring of the crane safety taking place at least during the putting up and/or taking down of the revolving tower crane.

The present disclosure discloses a crane, including: a chassis; a rotatable platform, rotatably arranged on the chassis; a main arm, including a first end hinged with a first end of the rotatable platform, and a second end for lifting a weight; a mast, configured to luff the main arm, wherein a first end of the mask is hinged with the first end of the rotatable platform, and a second end of the mast is connected to the second end of the main arm and a second end of the rotatable platform; and a first independent counterweight system, including a first independent counterweight, and a connecting structure connected between the first independent counterweight and the rotatable platform, wherein the connecting structure is configured to enable the first independent counterweight to be in a partial working state, and in the partial working state, the first independent counterweight is supported on the ground and the weight of the first independent counterweight is supported jointly by the ground and the rotatable platform.