DATA LOGGING DEVICE

• US 20160370208A1
• Filed: 06/18/2014
• Published: 12/22/2016
• Est. Priority Date: 06/28/2013
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Philips Lighting Holding BV (Signify N.V.)
• Inventors: VAZE, VIKRANT SUHAS, BAGHERI, SAEED REZA, PATEL, MAULIN DAHYABHAI
• Granted Patent: US 10,365,127 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01D 2204/14 Displaying of utility usage with respect to time, e.g. for monitoring evolution of usage or with respect to weather conditions
• CPC Class Codes: G01D 2204/24 Identification of individual loads, e.g. by analysing current/voltage waveforms
• CPC Class Codes: G01D 4/00 Tariff metering apparatus in taximeters G07B13/00; apparatus actuated by coins, cards or the like with meter-controlled dispensing of liquid, gas, or electricity G07F15/00
• CPC Class Codes: G01D 9/285 producing additional marks (e.g. reference lines time marks)
• CPC Class Codes: G01D 9/38 Producing one or more recordings, each recording being produced by controlling the recording element, e.g. stylus, in accordance with one variable and controlling the recording medium, e.g. paper roll, in accordance with another variable
• CPC Class Codes: G01R 21/133 by using digital technique
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05B 2219/2642 Domotique, domestic, home control, automation, smart house
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

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.

Claims

1. A portable system for logging sensor data and creating energy consumption patterns in an area comprising:

a low-accuracy clock; and

a processor in communication with a memory (160), the processor;

receiving data items from each of a plurality of sensors;

associating a time stamp generated by the 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 for each of the stored data items, wherein determining said high accuracy clock comprises;

approximating a correction of the time-stamp associated with the low-accuracy clock based on a known time pattern;

refining the correction based on a known occupancy pattern associated with a second known time pattern; and

applying the correction to the time-stamp associated with the low-accuracy of the stored data.

2. The portable system of claim 1, further comprising:

a high-accuracy clock.

3. The portable system of claim 2, wherein the processor further:

obtaining at least one time sample from the high-accuracy clock during the predetermined period of time; and

storing the at least one time sample from the high-accuracy clock.

4. The portable system of claim 3, wherein the at least one time sample from the high accuracy clock is obtained on a periodic basis.

5. The portable system of claim 1, wherein the step of processing the stored data further comprises:

transmitting the stored data items to a remote site.

6. The portable system of claim 1, wherein the step of processing the stored data items is performed after the predetermined period of time expires.

7. The portable system of claim 1, the step of processing the stored data items is performed during the predetermined period of time.

8. The portable system of claim 1, further comprising:

a display displaying the stored data items.

9. The portable system of claim 1, further comprising:

at least one of the plurality of the sensors.

10. The portable system of claim 1, further comprising:

a communication port for receiving the data items from at least one of the plurality of sensors.

11. The portable system of claim 1, wherein the processing further comprising:

determining at least one period of time in which a light is at least one of a state 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 is in the state of on and at least one period of time in which the area is in the state of unoccupied;

determining an energy savings using an automatic light operation based on the average values; and

storing the determined values.

12. The portable system of claim 11, wherein the processing further comprising:

determining an average energy savings using a closed-loop dimming system during the at least one period of occupancy of the area; and

determining a percentage energy savings using the closed-loop dimming system; and

storing the determined values.

13. A portable data logging device comprising:

means for receiving inputs from at least one of a plurality of devices;

a 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-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-accuracy clock time-stamp after the predetermined time has expired;

applying the correction value to each of the 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.

14. The portable device of claim 13, further comprising:

determining an energy savings using a closed loop dimming system.

15. The portable device of claim 14, further comprising:

a display displaying the stored data.

16. The portable device of claim 14, further comprising:

at least one of the plurality of devices.

17. The portable device of claim 14, further comprising:

means for transmitting the at least one of the stored at least one input and the determined values.

18. A method operable in a portable device comprising a processor, located within an area, the method causing the processor to execute steps of:

performing an initialization process 44 comprising;

determining at least one of a geographic location and a time,

performing a data collection process comprising;

receiving data items from at least one sensor for a predetermined period of time;

associating a time-stamp with each of the received data items, the time-stamp being associated with a low-accuracy clock;

storing the received data items and associated time-stamp;

performing a time correction on the time-stamp data;

performing an estimation of a light state comprising;

determining at least one period of time in which a light is on and at least one period of time in which the area is occupied;

determining an average value of each of at least one period of time in which the light is on and the area is occupied; and

determining an energy saving using an automatic light operation based on the average values.

19. A portable system for logging sensor data and creating energy consumption patterns in an area comprising:

a data collection device comprising;

a 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-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 accuracy clock for each of the stored data items, wherein determining said high accuracy clock comprises;

approximating a correction of the time-stamp associated with the low-accuracy clock based on a known time pattern;

refining the correction based on a known occupancy pattern associated with a second known time pattern; and

applying the correction to the time-stamp associated with the low-accuracy of the stored data.