Systems and methods for determining ambient temperature using lighting based sensors

• US 10,585,004 B1
• Filed: 07/15/2016
• Issued: 03/10/2020
• Est. Priority Date: 07/15/2015
• Status: Active Grant

• Current Assignee: Signify North America Corporation (Signify N.V.)
• Original Assignee: Signify North America Corporation (Signify N.V.)
• Inventors: Joseph, Neil
• Primary Examiner(s): Ngon, Ricky
• Application Number:
  US15/211,070
• Time in Patent Office: 1,334 Days
• Field of Search: 702 99
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/62 characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
• CPC Class Codes: F24F 11/64 using pre-stored data
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 2130/30 Artificial light
• CPC Class Codes: G01J 1/42 using electric radiation detectors optical or mechanical part G01J1/04; by comparison with a reference light or electric value G01J1/10
• CPC Class Codes: G01J 5/025 Interfacing a pyrometer to an external device or network; User interface
• CPC Class Codes: G01J 5/041 Mountings in enclosures or in a particular environment
• CPC Class Codes: G01J 5/80 Calibration using comparison with reference sources G01J5/52
• CPC Class Codes: G01K 11/00 Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
• CPC Class Codes: G01K 15/005 Calibration

Abstract

Systems and methods are provided for determining an ambient temperature in a volume using a lighting based sensor. A status of a light with which a temperature sensor is associated is determined. A correction factor is accessed from a computer-readable medium based on the status of the light. A measured temperature is received via the temperature sensor. The measured temperature is transformed based on the correction factor, and the transformed temperature is transmitted from the light to a remote location.

Claims

1. A system for monitoring an ambient temperature in a volume using a lighting based sensor, comprising:

a light;

a temperature sensor positioned in, on, or attached to the light;

a computer-readable medium encoded with correction factors associated with a plurality of statuses of the light;

a data processor configured to;

determine, via a light status determination module, a status of the light;

access a correction factor from the computer-readable medium based on the status of the light;

receive a measured temperature via the temperature sensor located in a first volume;

transform the measured temperature based on the correction factor; and

a wireless transmitter configured to transmit the transformed temperature from the light to a thermostat in a second volume, separate from the first volume.

2. The system of claim 1, wherein the temperature sensor is positioned in the light or on the light, wherein the temperature sensor is affected by the ambient temperature in the first volume and heat generated by the light.

3. The system of claim 2, wherein the correction factor is used to transform the measured temperature to represent the ambient temperature in the first volume.

4. The system of claim 3, wherein the correction factor is used to transform the measured temperature to represent the ambient temperature at a particular point in the first volume.

5. The system of claim 4, wherein the particular point is a height associated with humans standing or sitting in the first volume.

6. The system of claim 2, wherein the temperature sensor is further affected by a temperature of a data processor in the light.

7. The system of claim 1, wherein the status of the light is based on one or more of:

whether the light is on, whether the light is off, an amount of time that the light has been on, an amount of time that the light has been off, and a power level of the light.

8. The system of claim 1, wherein the data processor is further configured to determine a light status category based on the light status, and wherein the computer-readable medium is further encoded to include one correction factor for each of a plurality of light status categories.

9. The system of claim 8, wherein the light status categories include one or more of light warming up, light full power steady state, light cooling down, light recently off, light off, and light less than full power steady state.

10. The system of claim 8, wherein the correction factor changes based on a length of time that the light has been in the light status category and a particular time relationship associated with the light status category.

11. The system of claim 10, wherein the particular time relationship is a linear relationship, an exponential relationship, or a constant relationship.

12. The system of claim 11, wherein the data processor is further configured to calibrate the correction factor using a temperature measured by the temperature sensor, a status of the light, and a temperature measurement external to the light.

13. The system of claim 12, wherein the data processor is further configured to calibrate the correction factor by

evaluating a difference between the temperature measured by the temperature sensor and the external temperature measurement during the status of the light;

and

determining the correction factor based on the difference.

14. The system of claim 1, wherein the transformed temperature is used to adjust a heating or air conditioning unit for the first volume but not other volumes.

15. The system of claim 1, wherein the data processor is further configured to determine a temperature for the first volume based on the transformed temperature and additional temperature measurements from other lighting based temperature sensors.

16. The system of claim 1, wherein the correction factor is adjusted based on a light color currently associated with the light.

17. The system of claim 1, wherein the data processor is further configured to:

detect an amount of ambient light in the first volume using an ambient light sensor; and

adjust the transformed temperature or the correction factor based on an amount of detected ambient light.

18. The system of claim 1, wherein the data processor is further configured to adjust the transformed temperature or the correction factor based on whether a fan, an air conditioner, or a heater is running in the first volume.

19. The system of claim 1, wherein the transformed temperature is transmitted from the light via a wireless transmitter.

20. The system of claim 1, wherein the data processor is further configured to determine a frequency at which a thermostat sensor is manually set for the first volume, and wherein the transformed temperature or the correction factor is adjusted based on the determined frequency.