Magnetic tampering detection and correction in a utility meter
First Claim
1. An arrangement for use in an electricity meter, comprising:
- a sensor supported directly or indirectly by a meter housing, the sensor configured to measure a magnetic field in proximity to a current sensor of the electricity meter, the sensor configured to generate a measurement signal representative of, at least in part, a magnitude of the magnetic field;
a processing circuit operably coupled to receive first information representative of the measurement signal and operably coupled to receive current measurement information representative of a current measurement signal generated by the current sensor based on the line current, the processing circuit configured toobtain a first value representative of the magnetic field based on the first information;
determine a first adjustment value responsive to a determination that the first value exceeds a first threshold value;
generate energy consumption information based at least in part on the first adjustment value and the current measurement information; and
a memory storing information correlating magnetic values to adjustment values, and wherein the processing circuit is further configured to determine the first adjustment value using at least part of the stored information correlating magnetic values to adjustment values.
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Accused Products
Abstract
An arrangement for use in an electricity meter includes a sensor and a processing circuit. The sensor is supported directly or indirectly by a meter housing. The sensor is configured to measure a magnetic field in proximity to a current sensor of the electricity meter. The sensor is also configured to generate a measurement signal representative of, at least in part, a magnitude of the magnetic field. The processing circuit is operably coupled to receive first information representative of the measurement signal. The processing circuit is configured to obtain a first value representative of the magnetic field based on the first information, and determine a first adjustment value responsive to a determination that the first value exceeds the first threshold value. The processing circuit is further configured to generate energy consumption information based at least in part on the first adjustment value.
18 Citations
19 Claims
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1. An arrangement for use in an electricity meter, comprising:
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a sensor supported directly or indirectly by a meter housing, the sensor configured to measure a magnetic field in proximity to a current sensor of the electricity meter, the sensor configured to generate a measurement signal representative of, at least in part, a magnitude of the magnetic field; a processing circuit operably coupled to receive first information representative of the measurement signal and operably coupled to receive current measurement information representative of a current measurement signal generated by the current sensor based on the line current, the processing circuit configured to obtain a first value representative of the magnetic field based on the first information; determine a first adjustment value responsive to a determination that the first value exceeds a first threshold value; generate energy consumption information based at least in part on the first adjustment value and the current measurement information; and a memory storing information correlating magnetic values to adjustment values, and wherein the processing circuit is further configured to determine the first adjustment value using at least part of the stored information correlating magnetic values to adjustment values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for use in an electricity meter, comprising:
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a) obtaining a first value representative of a magnetic field in proximity to a current sensor of the electricity meter; b) employing a processing circuit to determine a first adjustment value responsive to a determination that the first value exceeds a first threshold value; c) generating energy consumption information in the electricity meter using at least in part the first adjustment value in a calculation of the energy consumption information; d) obtaining a current measurement signal from the current sensor, a voltage measurement signal from a voltage sensor, and wherein step c) further comprises generating the energy consumption information in the electricity meter based at least in part on the first adjustment value, the voltage measurement signal, and the current measurement signal; and wherein step b) further comprises employing the processing circuit to determine the first adjustment value at least in part based on information stored in a memory, the stored information correlating magnetic values to adjustment values. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification