Self-tuning current transformer
An electricity usage monitor may include a coupling component to attach the electricity usage monitor to an electrical circuit to monitor electricity usage of the electrical circuit, an analog-digital converter (ADC) configured to convert analog current readings captured by the electricity usage monitor into digital values, a processor operably coupled to the ADC, and a non-transitory, computer-readable medium operably coupled to the processor and comprising instructions which, when executed by the processor, cause the processor to perform operations. The operations may include determining a standard deviation of the digital values, based on the standard deviation, adjusting a gain of the ADC, and transmitting a signal to a server comprising the digital values.
1. An electricity usage monitor comprising:
a coupling component to attach the electricity usage monitor to an electrical circuit to monitor electricity usage of the electrical circuit;
an analog-digital converter (ADC) configured to convert readings captured by the electricity usage monitor into digital values;
a network communication interface;
a processor operably coupled to the ADC; and
a non-transitory, computer-readable medium operably coupled to the processor and comprising instructions which, when executed by the processor, cause the processor to:
determine a standard deviation of the digital values;
based on the standard deviation, adjust a gain of the ADC; and
transmit, by the communication interface, a signal comprising the digital values and the adjusted gain of the ADC.
2. The electricity usage monitor of claim 1 , wherein adjusting the gain of the ADC comprises adjusting the gain to be proportional to a multiple of the standard deviation.
3. The electricity usage monitor of claim 1 , wherein adjusting the gain of the ADC comprises adjusting the gain based on an average of the digital values.
4. The electricity usage monitor of claim 1 , wherein the instructions further cause the processor to receive an acknowledgement indicating that the gain has been adjusted at a server before adjusting the gain.
5. The electricity usage monitor of claim 4 , wherein the signal comprises ADC buckets associated with the digital values.
6. The electricity usage monitor of claim 1 , wherein the instructions further cause the processor to:
determine a new standard deviation of the digital values; and
based on the new standard deviation, update the adjusted gain of the ADC.
7. A non-transitory, computer-readable medium comprising instructions that, when executed by a processor, cause the processor to:
determine a standard deviation of readings captured by an electricity usage monitor;
based on the standard deviation of the readings, adjust a gain of an analog-digital converter (ADC); and
transmit a signal comprising digital values generated by the ADC, wherein the digital values comprise digital conversions of the readings and the adjusted gain of the ADC.
8. The medium of claim 7 , wherein adjusting the gain of the ADC comprises adjusting the gain to be proportional to a multiple of a standard deviation of the digital values.
9. The medium of claim 7 , wherein adjusting the gain of the ADC comprises adjusting the gain based on an average of the digital values.
10. The medium of claim 7 , wherein the instructions further cause the processor to receive an acknowledgement indicating that the gain has been adjusted at a server before adjusting the gain.
11. The medium of claim 10 , wherein the signal comprises ADC buckets associated with the digital values.
12. The medium of claim 7 , wherein the instructions further cause the processor to:
determine a new standard deviation of the digital values; and
based on the new standard deviation, update the adjusted gain of the ADC.
13. An electricity usage monitoring system comprising:
a network communication interface to communicate over a network with an electricity usage monitor;
one or more processors to:
receive, by the network communication interface, from the electricity usage monitor, a signal comprising digital values comprising digital conversions of readings captured by the electricity usage monitor, wherein the readings are converted into the digital values by an analog-digital converter (ADC) of the electricity usage monitor;
receive from the electricity usage monitor, a gain of the ADC; and
based on a standard deviation of the digital values, transmit a signal to the electricity usage monitor to adjust the gain of the ADC.
14. The system of claim 13 , wherein adjusting the gain of the ADC comprises adjusting the gain to be proportional to a multiple of the standard deviation of the digital values.
15. The system of claim 13 , wherein adjusting the gain of the ADC comprises adjusting the gain based on an average of the digital values.
16. The system of claim 15 , wherein the one or more processors receive, from the electricity usage monitor, an acknowledgement of the adjusted gain.
17. The system of claim 13 , wherein the digital values comprise ADC buckets associated with electrical measurements.
18. The system of claim 17 , wherein the one or more processors decode the digital values using the adjusted gain.
19. The system of claim 13 , wherein the one or more processors determine a new standard deviation of the digital values; and based on the new standard deviation, update the adjusted gain of the ADC.