System and method for indirectly detecting machine movement

A method for indirectly detecting a movement of a machine and a failure of a speed sensor, comprising:

• receiving an operator input signal;
• determining a power command based on the operator input signal;
• measuring a hydrostatic pressure associated with a hydrostatic drive portion of the machine;
• identifying a movement of the machine if the power command exceeds a first threshold and the hydrostatic pressure falls below a second threshold for at least a first threshold length of time;
• and
• determining a speed sensor failure if the movement of the machine is identified and no speed is detected by the speed sensor for at least a second threshold length of time.

An indirect machine movement detection system for detecting a movement of a machine and a failure of a speed sensor, comprising:

• an operator input device configured to receive an operator input signal;
• a sensor configured to measure a machine operation parameter;
• and
• a controller coupled to the operator input device and the sensor, and being configured to:
• receive the operator input signal from the operator input device;
• determine a first factor based on the operator input signal;
• receive the machine operation parameter from the sensor;
• determine a second factor based on the machine operation parameter;
• identify a movement of the machine if the first factor is out of a first threshold range and the second factor is out of a second threshold range for at least a first threshold length of time;
• and
• determine a speed sensor failure if the movement of the machine is identified and no speed is detected by the speed sensor for at least a second threshold length of time.

A machine, comprising:

• a power source;
• a speed sensor;
• and
• an indirect machine movement detection system coupled to the speed sensor, wherein the indirect machine movement detection system includes:
• an operator input device configured to receive an operator input signal;
• a sensor configured to measure a machine operation parameter;
• and
• a controller coupled to the operator input device and the sensor, and being configured to:
• identify a movement of the machine based on the operator input signal received from the operator input device and the machine operation parameter measured by the sensor;
• and
• determine a speed sensor failure if the movement of the machine is identified and no speed is detected by the speed sensor for at least a threshold length of time.