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

Claim 9:
10. A method for detecting an unsafe operating lifting condition for a luffing crane, the method comprising the steps of:
measuring orientation of a hook of a crane attached to a load from an electronic gyroscope and an accelerometer of an inertial measurement unit attached to the hook of the crane;
obtaining orientation data from the electronic gyroscope and the accelerometer of the inertial measurement unit;
measuring yaw of the hook from a magnetometer of the inertial measurement unit;
obtaining yaw data from the magnetometer of the inertial measurement unit;
calculating, using a microcontroller, a compensation factor from the yaw data measured by the magnetometer;
combining, using the microcontroller, the orientation data measured by the accelerometer and the electronic gyroscope with a statistical estimation filter;
determining a deviation of the hook from a 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; and
activating an alert element if the hook is not in a plumb position.