Patent ID: 11897733
Assignee: nan
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A sensing device for a luffing crane for detecting unsafe operating conditions comprising:
an inertial measurement unit for measuring pitch and yaw of a hook of a crane attached to a load, the inertial measurement unit comprises:
an electronic gyroscope;
an accelerometer, wherein the gyroscope and the accelerometer are adapted to measure orientation of the hook and obtain orientation data to measure deviation from a plumb position of the hook;
a magnetometer adapted to measure yaw of the hook and adapted to measure changes of the hook relative to magnetic north and obtain yaw data, and
a microcontroller arranged to:
calculate a compensation factor from yaw data measured by the magnetometer;
combine the orientation data measured by the gyroscope and the accelerometer with a statistical estimation filter; and
determine deviation of the hook of the crane from the plumb position before commencement of lifting the load attached to the hook using the combination of the orientation data with the statistical estimation filter and the compensation factor,

wherein the inertial measurement unit is adapted to activate an alert element if the deviation of the hook exceeds a predetermined limit.