Self-calibrating contactless power consumption sensing
First Claim
1. A method of sensing electrical power being provided to a structure using a sensing device, a calibration device, and one or more processing modules, the sensing device comprising one or more magnetic field sensors, the sensing device being attached to a panel of a circuit breaker box, the panel of the circuit breaker box overlying at least a part of one or more main electrical power supply lines for an electrical power infrastructure of a structure, the calibration device comprising a load unit, the calibration device being electrically coupled to the electrical power infrastructure of the structure, the method comprising:
- automatically calibrating the sensing device by determining a first transfer function in a piecewise manner based on a plurality of ordinary power consumption changes in the structure; and
determining a power consumption measurement using the one or more processing modules based on one or more output signals of the sensing device and the first transfer function, wherein;
the load unit of the calibration device is configured to draw a range of loads;
after the sensing device is calibrated, the one or more processing modules are configured to use the sensing device to determine a range of power consumption measurements; and
the range of loads is less than the range of power consumption measurements.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of sensing electrical power being provided to a structure using a sensing device, a calibration device, and one or more processing modules. The sensing device can include one or more magnetic field sensors. The sensing device can be attached to a panel of a circuit breaker box. The panel of the circuit breaker box can overlie at least a part of one or more main electrical power supply lines for an electrical power infrastructure of a structure. The calibration device can include a load unit. The calibration device can be electrically coupled to the electrical power infrastructure of the structure. The method can include automatically calibrating the sensing device by determining a first transfer function in a piecewise manner based on a plurality of ordinary power consumption changes in the structure. The method also can include determining a power consumption measurement using the one or more processing modules based on one or more output signals of the sensing device and the first transfer function. Other embodiments are provided.
222 Citations
19 Claims
-
1. A method of sensing electrical power being provided to a structure using a sensing device, a calibration device, and one or more processing modules, the sensing device comprising one or more magnetic field sensors, the sensing device being attached to a panel of a circuit breaker box, the panel of the circuit breaker box overlying at least a part of one or more main electrical power supply lines for an electrical power infrastructure of a structure, the calibration device comprising a load unit, the calibration device being electrically coupled to the electrical power infrastructure of the structure, the method comprising:
-
automatically calibrating the sensing device by determining a first transfer function in a piecewise manner based on a plurality of ordinary power consumption changes in the structure; and determining a power consumption measurement using the one or more processing modules based on one or more output signals of the sensing device and the first transfer function, wherein;
the load unit of the calibration device is configured to draw a range of loads;
after the sensing device is calibrated, the one or more processing modules are configured to use the sensing device to determine a range of power consumption measurements; and
the range of loads is less than the range of power consumption measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of sensing electrical power being provided to a structure using a sensing device, a calibration device, and one or more processing modules, the sensing device being attached to a panel of a circuit breaker box, the panel of the circuit breaker box overlying at least a part of one or more main electrical power supply lines for an electrical power infrastructure of a structure, the calibration device comprising a load unit, the method comprising:
-
determining a current flowing in the one or more main electrical power supply lines based at least in part on one or more output signals of the sensing device; and determining a phase difference between the current flowing in the one or more main electrical power supply lines and a voltage of the one or more main electrical power supply lines measured by the calibration device, wherein; the calibration device is electrically coupled to the electrical power infrastructure of the structure; the sensing device comprises one or more magnetic field sensors configured to measure a magnetic flux produced by at least a part of the one or more main electrical power supply lines and generate the one or more output signals of the sensing device based on the magnetic flux measured by the sensing device; the sensing device is devoid of being electrically or physically coupled to the one or more main electrical power supply lines;
the load unit of the calibration device is configured to draw a range of loads;
the one or more processing modules are configured to use the sensing device to determine a range of electrical power usage; and
the range of loads is less than the range of the electrical power usage. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification