System and method for detecting machine movement and speed sensor failure
First Claim
1. A method for detecting a movement of a machine and a failure of a speed sensor, the method being performed by a processor and comprising:
- receiving an operator input signal;
determining a first factor based on the operator input signal, where the first factor is a pump command;
measuring a machine operation parameter, where the machine operation parameter includes a hydrostatic pressure;
determining a second factor based on the machine operation parameter;
identifying a movement of the machine if, for at least a first threshold length of time, both (1) the first factor is out of a first threshold range and (2) the second factor is out of a second threshold range; 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.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for indirectly detecting a movement of a machine and a failure of a speed sensor is disclosed. The method may include receiving an operator input signal, and determining a first factor based on the operator input signal. The method may also include measuring a machine operation parameter, and determining a second factor based on the machine operation parameter. The method may further include identifying 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. The method may also include 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.
-
Citations
17 Claims
-
1. A method for detecting a movement of a machine and a failure of a speed sensor, the method being performed by a processor and comprising:
-
receiving an operator input signal; determining a first factor based on the operator input signal, where the first factor is a pump command; measuring a machine operation parameter, where the machine operation parameter includes a hydrostatic pressure; determining a second factor based on the machine operation parameter; identifying a movement of the machine if, for at least a first threshold length of time, both (1) the first factor is out of a first threshold range and (2) the second factor is out of a second threshold range; 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for detecting a movement of a machine and a failure of a speed sensor, the method being performed by a processor and 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, for at least a first threshold length of time, both (1) the power command exceeds a first threshold and (2) the hydrostatic pressure falls below a second threshold; 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.
-
-
11. A 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 machine operation sensor configured to measure a machine operation parameter; and a controller coupled to the operator input device and the machine operation 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, where the first factor is a pump command; receive the machine operation parameter from the machine operation sensor; determine a second factor based on the machine operation parameter, where the second factor is a power management factor; identify a movement of the machine if, for at least a first threshold length of time, both (1) the first factor is out of a first threshold range and (2) the second factor is out of a second threshold range; 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. - View Dependent Claims (12, 13, 14)
-
-
15. A machine, comprising:
-
a power source; a speed sensor; and a machine movement detection system coupled to the speed sensor, wherein the machine movement detection system includes; an operator input device configured to receive an operator input signal; a machine operation sensor configured to measure a machine operation parameter, where the machine operation parameter includes a hydrostatic pressure; and a controller coupled to the operator input device and the machine operation sensor, and being configured to; determine a first factor based on the operator input signal, where the first factor is a pump command; identify a movement of the machine based on the first factor and the machine operation parameter measured by the machine operation 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. - View Dependent Claims (16, 17)
-
Specification