Data logging device
First Claim
Patent Images
1. 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.
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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.
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Citations
18 Claims
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1. A portable system for logging sensor data and creating energy consumption patterns in an area comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A portable data logging device comprising:
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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. - View Dependent Claims (14, 15, 16, 17)
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18. A portable system for logging sensor data and creating energy consumption patterns in an area comprising:
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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.
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Specification