Method and apparatus for detecting conditions favorable for growth of fungus

• US 20050262923A1
• Filed: 05/27/2004
• Published: 12/01/2005
• Est. Priority Date: 05/27/2004
• Status: Abandoned Application

• Current Assignee: Nest Labs Incorporated (Alphabet Inc.)
• Original Assignee: Nest Labs Incorporated (Alphabet Inc.)
• Inventors: Kates, Lawrence
• Application Number:
  US10/856,395
• Publication Number:
  US 20050262923A1
• Time in Patent Office: Days
• US Class Current: 73/29.10
• 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 2110/20 Humidity

Abstract

A system for conditions favorable for the growth of fungus in a building or vehicle is described. One or more humidity sensors are places in areas, such as under sinks, in an attic spaces, etc. to detect excess humidity (due to leaks, condensation, etc.). In one embodiment, a monitoring computer compares humidity measurements taken from different sensor units in order to detect areas that have excess humidity. Thus for example, the monitoring computer can compare the humidity readings from a first sensor unit in a first attic area, to a humidity reading from a second sensor unit in a second area. For example, the monitoring computer can take humidity readings from a number of attic areas to establish a baseline humidity reading and then compare the specific humidity readings from various sensor units to determine if one or more of the units are measuring excess humidity. The monitoring computer flags areas of excess humidity for further investigation by maintenance personnel. In one embodiment, the monitoring computer maintains a history of humidity readings for various sensor units and flags areas that show an unexpected increase in humidity for investigation by maintenance personnel.

Claims

1. A system for detecting conditions favorable for fungus, comprising:

a first humidity sensor located in a first building area to produce first humidity data;

a second humidity sensor located in a second building area to produce second humidity data; and

a processor configured to collect moisture readings from said first humidity sensor and said second humidity sensor, said processor configured to indicate conditions favorable for fungus growth by comparing said first humidity data and said second humidity data.

2. The system of claim 1, wherein said first processor establishes a baseline humidity by comparing humidity readings from a plurality of humidity sensors and indicates possible fungus growth conditions in said first building area when at least a portion of said first humidity data exceeds said baseline humidity by a specified amount.

3. The system of claim 1, wherein said first processor establishes a baseline humidity by comparing humidity readings from a plurality of humidity sensors and indicates possible fungus growth conditions in said first building area when at least a portion of said first humidity data exceeds said baseline humidity by a specified percentage.

4. The system of claim 1, wherein said first processor establishes a baseline humidity history by comparing humidity readings from a plurality of humidity sensors and indicates possible fungus growth conditions in said first building area when at least a portion of said first humidity data exceeds said baseline humidity history by a specified amount over a specified period of time.

5. The system of claim 1, wherein said first processor establishes a baseline humidity history by comparing humidity readings from a plurality of humidity sensors over a period of time and indicates possible fungus growth conditions in said first building area when at least a portion of said first humidity data exceeds said baseline humidity by a specified percentage of a specified period of time.

6. The system of claim 1, wherein said first building area comprises an area proximate to sink drain.

7. The system of claim 1, said first building area comprises an area proximate to a plumbing fixture.

8. The system of claim 1, wherein said first building area comprises an attic area.

9. The system of claim 1, wherein said first building area comprises an exterior wall area.

10. The system of claim 1, further comprising means for wirelessly transmitting data from said first humidity sensor to said processor.

11. The system of claim 1, said first humidity sensor provided to a sensor unit configured to wireless transmit said first humidity data to said processor.

12. The system of claim 1, wherein said first humidity sensor is provided to a wireless sensor unit configured to report data measured by said first humidity sensor when said wireless sensor unit determines that said first humidity data fails a threshold test, said wireless sensor unit configured to operating in a low-power mode when not transmitting or receiving data.

13. The system of claim 1, wherein said first humidity sensor is provided to a wireless sensor unit configured to report data measured by said first humidity sensor when said wireless sensor unit determines that said first humidity data fails a threshold test compared to a baseline humidity setting, said wireless sensor unit configured to receive said baseline humidity setting from said processor.

14. The system of claim 1, wherein said processor provides said first humidity sensor data and said second humidity sensor data to a monitoring computer than notifies a responsible party.

15. The system of claim 1, wherein said first humidity sensor is provided to a wireless sensor unit, said wireless sensor unit configured to receive an instruction to change a status reporting interval.

18. A method for detecting conditions favorable for fungus, comprising:

measuring humidity in a first area using a first humidity sensor to obtain first humidity data;

measuring humidity in a second area using a second humidity sensor to obtain second humidity data;

comparing said first humidity data to a reference humidity established from at least a portion of said second humidity data comparing said first humidity data to said second humidity data; and

computing the possibility of conditions favorable to fungus growth in said first area when at least a portion of said first humidity data exceeds a threshold value, said threshold value determined at least in part as a function of said reference humidity.

16. The system of claim 27, wherein said first humidity sensor is provided to a wireless sensor unit, said wireless sensor unit configured to receive an instruction to change a sensor data reporting interval.

17. The system of claim 27, wherein said first humidity sensor is provided to a wireless sensor unit, wherein a monitoring computer is configured to monitor a status of said wireless sensor unit.

19. The method of claim 18, wherein said threshold value is established at least in part as a percentage of said reference humidity.

20. The method of claim 18, wherein said threshold value is established at least in part as a specified humidity delta above said reference humidity.

21. The method of claim 18, wherein said threshold value is established at least in part as the lesser of a specified humidity and percentage of said reference humidity.

22. The method of claim 18, wherein said threshold value is established at least in part as the lesser of a specified maximum humidity and scaled value of said reference humidity.

23. The method of claim 18, wherein said comparing said first humidity data to a reference humidity comprises a comparison over time.

24. The method of claim 18, wherein said reference humidity is based at least in part on a time history of humidity measurements.

25. The method of claim 18, wherein said first area comprises an area proximate to sink drain.

26. The method of claim 18, said first area comprises an area proximate to a plumbing fixture.

27. The method of claim 18, wherein said first area comprises an attic area.

28. The method of claim 18, wherein said first area comprises an exterior wall area.

29. The method of claim 18, further comprising wirelessly transmitting data from said first humidity sensor to a monitoring station.

30. The method of claim 18, further comprising transmitting said first humidity data when said first humidity data fails a threshold test, and operating a humidity sensor unit in a low-power mode when not transmitting or receiving data.

31. The method of claim 18, further comprising receiving a threshold humidity setting from a monitoring station and transmitting at least a portion of said first humidity data when said at least a portion of said first humidity data fails a threshold test compared to said threshold humidity setting.

32. The method of claim 18, further comprising measuring a temperature in said first area and using temperature measurements in said first area in connection with humidity measurements in said first area to compute a likelihood of fimgus growth, wherein a relatively warmer temperature increases a likelihood of fungus growth.

33. The method of claim 18, further comprising measuring a temperature in said first area and using temperature measurements in said first area in connection with humidity measurements in said first area to adjust said threshold value.

34. The method of claim 18, further comprising measuring a temperature in said first area, wherein said threshold value is computed at least in part as a function of temperature.

35. The method of claim 18, wherein said threshold value is computed at least in part as a function of temperature, such that temperatures relatively more favorable to fungus growth result in a relatively lower threshold than temperatures relatively less favorable for fungus growth.

36. The method of claim 18, wherein said computing the possibility of conditions favorable to fungus growth depends at least in part on a temperature of said first area such that temperatures relatively more favorable to fungus growth indicate a relatively higher likelihood of fungus growth than temperatures relatively less favorable for fungus growth.

37. A system for detecting conditions favorable for fimgus, comprising:

means for reporting humidity measurements from a first location;

means for reporting humidity measurements from a second location; and

a processor configured to compute a reference humidity established least a portion of said humidity measurements from said first location, and to indicating the possibility of conditions favorable to fungus growth in said first area when at least a portion of said humidity measurements form said first location exceeds a value determined at least in part as a function of said reference humidity.