Data logging device
AssigneeSignify Holding B.V.
InventorsMaulin Dahyabhai Patel, Vikrant Suhas Vaze, Saeed Reza Bagheri
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Abstract
System and methods for data logging are disclosed. The method comprising performing an initialization process, performing a data collection process in which data from a plurality of sensors is collected and time stamped, performing a time correction on the time-stamp data based on patterns of time and occupancy, performing an estimation of a light state based on the corrected time stamped data and determining an energy saving using an automatic light operation based on determined light state estimation.
Claims18
A portable system for logging sensor data and creating energy consumption patterns in an area comprising:
- a low-power and/or low accuracy clock;
- and
- a processor in communication with a memory, the processor;
- receiving data items from each of a plurality of sensors;
- associating a time stamp generated by the low-power and/or low accuracy clock with each data item received from each of the plurality of sensors;
- storing the received data items for a predetermined period of time;
- and
- processing the stored data items to determine a high accuracy clock time stamp for each of the stored data items, wherein determining said high accuracy clock time stamp comprises:
- determining a time usage pattern of the area during a period of receiving the data items;
- approximating a correction of the time-stamp associated with the low-power and/or low accuracy clock based on the time usage pattern;
- determining an occupancy pattern during a period of receiving the data items;
- refining the correction based on the occupancy pattern associated with a second known time usage pattern;
- and
- applying the correction to the time-stamp associated with the low-power and/or low accuracy of the stored data.
A portable data logging device comprising:
- means for receiving inputs from at least one of a plurality of devices:
- a low-power and/or low accuracy clock;
- a processor in communication with a memory, the processor:
- receiving at least one input from the at least one of a plurality of devices;
- associating a time-stamp from the low-power and/or low accuracy clock with each of the at least one input from the at least one of a plurality of devices;
- storing the at least one input and associated time-stamp for a predetermined time;
- generating a correction value of each of the low-power and/or low accuracy clock time-stamp after the predetermined time has expired;
- applying the correction value to each of the low-power and/or low accuracy clock time-stamp, the correction being based on predetermined time and occupancy patterns,
- processing the time-stamp corrected stored inputs to determine energy patterns within the stored at least one input;
- determining at least one period of time in which a light is at least one of:
- on and off;
- determining at least one period of time in which the area is in a state of at least one of:
- occupied and unoccupied;
- determining an average value for each of at least one period of time in which a light on and at least on period of time in which the area is unoccupied;
- determining an energy savings using an automatic light operation from the average values;
- and
- storing the determined values.
A portable system for logging sensor data and creating energy consumption patterns in an area comprising:
- a data collection device comprising:
- a low-power and/or low accuracy clock;
- and
- a processor in communication with a memory, the processor;
- receiving data items from each of a plurality of sensors;
- associating a time stamp generated by the low-power and/or low accuracy clock with each data item received from each of the plurality of sensors;
- storing the received data items for a predetermined period of time;
- and
- a transmitter for transmitting said stored received data items;
- and
- a remote site:
- receiving the stored data items;
- processing the stored data items to determine a high power and/or high accuracy clock for each of the stored data items, wherein determining said high power and/or high accuracy clock comprises:
- approximating a correction of the time-stamp associated with the low-power and/or low accuracy clock based on a known time usage pattern;
- refining the correction based on a known occupancy pattern associated with a second known time usage pattern;
- and
- applying the correction to the time-stamp associated with the low-power and/or low accuracy of the stored data.
Dependencies are inferred from the claim text.