Ground difference compensating system
AssigneeCaterpillar Inc.
InventorsKris W. Johnson, Sivaprasad Akasam
Life of this patent
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Abstract
A method of ground level compensation includes measuring a voltage of at least one signal with respect to a primary ground potential and measuring, with respect to the primary ground potential, a voltage level associated with a secondary ground potential. A difference between the voltage level associated with the secondary ground potential and an expected value is calculated. The measured voltage of the at least one signal is adjusted by an amount corresponding to the calculated difference.
Claims18
A method of ground level compensation, comprising:
- measuring a voltage of at least one signal with respect to a primary ground potential to provide a voltage measurement;
- measuring, with respect to the primary ground potential, a voltage level associated with a secondary ground potential;
- calculating a difference between the voltage level associated with the secondary ground potential and an expected value;
- adjusting the voltage measurement of the at least one signal by an amount corresponding to the difference.
A ground compensating system, comprising:
- a control unit;
- a primary ground point for the control unit, the primary ground point having a first voltage potential;
- at least one data input supplying an input signal to the control unit;
- a reference input supplying a second voltage potential, associated with a secondary ground point, to the control unit;
- and
- a processor configured to:
- measure, with respect to the first voltage potential, a first voltage magnitude associated with the input signal to provide a voltage measurement;
- measure, with respect to the first voltage potential, a second voltage magnitude associated with the secondary ground point;
- calculate a difference between the second voltage magnitude and an expected value;
- and
- adjust the voltage measurement of the first voltage magnitude by an amount corresponding to the difference.
A ground compensating control system for a vehicle, comprising:
- a control unit;
- a control unit ground point having a first voltage potential;
- at least one data input supplying an analog signal from a vehicle sensor to the control unit;
- a reference input supplying a second voltage potential to the control unit, the second voltage potential being equivalent to a voltage of a single point ground of the vehicle plus a fixed offset voltage;
- and
- a processor configured to:
- measure, with respect to the first voltage potential, a first voltage magnitude associated with the analog signal to provide a voltage measurement;
- measure, with respect to the first voltage potential, a second voltage magnitude associated with the second voltage potential;
- calculate a difference between the second voltage magnitude and an expected value for the second voltage potential;
- and
- adjust the voltage measurement of the first voltage magnitude by an amount corresponding to the difference.
Dependencies are inferred from the claim text.