SWAY ANGLE DETECTION SENSOR FOR SUSPENDED LOAD OF CRANE

PROBLEM TO BE SOLVED: To provide a sway angle detection sensor for a suspended load of a crane capable of precisely detecting a sway angle of the suspended load in real time with a simple mechanism using a weight for hoisting limit.SOLUTION: A MEMS inertial sensor 12 provided at a weight 11 for an over-hoisting detection limit switch is caused to follow the sway of a wire rope R, and the rotation about a vertical axis 4 is constrained by two non-rotation wires 13. The angles or angular velocities of two axes about a luffing axis 2 parallel to a crane luffing central axis and horizontal rotation axis 3 orthogonal thereto are precisely detected in real time by eliminating the need for conversion with a controller by the MEMS inertial sensor 12, and the device is made compact by using the weight 11.