METHOD AND SYSTEM FOR MONITORING THE OPERATION OF A CABLE SHOVEL MACHINE

A monitor system for an electric cable shovel determines when the shovel has completed a digging operation, and a subsequent dumping operation. The system includes an inclinometer, a current sensor, and a monitor circuit. The inclinometer is mounted on the dipper arm for providing an output indicative of the inclination of the dipper arm. The current sensor senses the level of the electrical current supplied to the electric motor. The monitor circuit determines when the current sensor provides an indication of a current level in excess of a digging current threshold level for a period of time in excess of a predetermined period, and during such period of time the inclinometer indicates that the inclination of the dipper arm is below a digging threshold inclination. In such a case, the monitor circuit provides an output indicating that the shovel has completed a digging operation. A subsequent dumping operation is monitored in a similar manner, with the rotation of the monitor and the actuation of the trip lever being sensed. GPS receivers on the electric cable shovel body provide an indication of the location at which the shovel is digging, and a worksite model is referenced to determine the material being mined.