Patent ID: 11885223
Assignee: THE CHARLES MACHINE WORKS, INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A system, comprising:
a first motor;
a second motor;
an elongate hollow outer member, rotationally coupled to the first motor;
an elongate inner member, rotationally coupled to the second motor, wherein the elongate inner member is disposed within the hollow outer member and independently rotatable relative thereto,
a first rotation sensor configured to detect the rotation of the elongate hollow outer member and send a first signal;
a second rotation sensor configured to detect the rotation of the elongate inner member and send a second signal; and
a processor comprising a memory, the processor configured to:
store a predetermined drag condition in the memory;
receive the first signal and the second signal;
using the first signal, determine a rotation rate of the elongate hollow outer member;
using the second signal, determine a rotation rate of the elongate inner member; and
compare the rotation rate of the inner member and the rotation rate of the elongate hollow outer member to the predetermined drag condition.