Efficient compression of sensor data

A network device, comprising:

• a processor;
• a metrology device configured to measure utility consumption and to thereby produce metrology data;
• one or more memory devices in communication with the processor;
• applications defined in the one or more memory devices and executed by the processor, and wherein the applications comprise:
• a peak detector application, configured to receive the metrology data from the metrology device as input, and configured to create data comprising:
• a timestamped peak-values data-signal;
• and
• a peak-removed data-signal;
• a median filter application, configured to receive the peak-removed data-signal, and configured to create a median-filtered data-signal;
• and
• a level-shift detector application, configured to receive the median-filtered data-signal, and configured to create a timestamped level-shift data-signal;
• and
• a connection to a network, wherein the processor is configured to cause transmission of the timestamped peak-values data-signal and the timestamped level-shift data-signal over the connection to the network to a server.

One or more non-transitory computer-readable media storing computer-executable instructions that, when executed by one or more processors, configure a computing device to perform acts comprising:

• receiving metrology data from a metrology device, the metrology data comprising one or more of:
• voltage (V);
• current (A);
• resistive power (W);
• and
• volt-amps reactive power (VAR) data;
• processing the metrology data, wherein the processing comprises:
• performing peak-detection on the metrology data, to create data-signals comprising:
• a timestamped peak-values data-signal;
• and
• a peak-removed data-signal;
• performing median-filtering on the peak-removed data-signal, wherein a median-filtered data-signal is created;
• and
• performing level-shift detection on the median-filtered data-signal, wherein a timestamped level-shift data-signal is created;
• and
• sending data to a server, the data comprising:
• the timestamped peak-values data-signal;
• and
• the timestamped level-shift data-signal.