System and Method for Predicting Mold Growth in an Environment

• US 20070026107A1
• Filed: 09/15/2006
• Published: 02/01/2007
• Est. Priority Date: 04/19/2005
• Status: Abandoned Application

• Current Assignee: IAQ Laboratories International LLC
• Original Assignee: IAQ Laboratories International LLC
• Inventors: Zhang, Chaoming, Wang, Jianrong
• Application Number:
  US11/532,372
• Publication Number:
  US 20070026107A1
• Time in Patent Office: Days
• US Class Current: 426/55
• CPC Class Codes: C12Q 1/04 Determining presence or kind of microorganism; Use of selective media for testing antibiotics or bacteriocides; Compositions containing a chemical indicator therefor C12Q1/6897 takes precedence

Abstract

Mold growth monitoring and prediction systems and methods for an environment are disclosed. The system includes a processing unit, a temperature sensor, and a humidity sensor. The processing unit obtains a temperature reading and a humidity reading of the environment from the sensors. The processing unit uses an algorithm to determine a probability of mold growth based on the temperature reading, the humidity reading, and a time reading. For example, the algorithm defines an envelope based on temperature, humidity, and one or more species of mold. The envelope substantially separates conditions detrimental to mold growth from conditions conducive to mold growth for the species of mold. The processing unit uses the algorithm to determine whether the temperature reading and the humidity reading fall within detrimental or conducive conditions to mold growth. Based on the conditions, the processing unit either increases or decreases the probability of mold growth.

Claims

1. A mold growth prediction system, comprising:

at least one sensor unit having a first wireless device, a timer, and one or more sensors, the one or more sensors obtaining temperature data and humidity data of an environment according to a time interval of the timer, the first wireless device transmitting the obtained temperature data and humidity data; and

at least one processing unit having a second wireless device, the second wireless device receiving the transmitted temperature data and humidity data, the at least one processing unit determining a probability of mold growth for the environment based on the temperature data, the humidity data, and time data related to the time interval.

2. The system of claim 1, wherein a computer includes at least a portion of the at least one processing unit.

3. The system of claim 1, wherein a control unit includes at least a portion of the at least one processing unit.

4. The system of claim 1, wherein the first and second wireless devices each comprise a wireless transceiver capable of transmitting and receiving multi-band wireless frequencies.

5. The system of claim 4, wherein in response to receiving the transmitted temperature data and humidity data, the at least one processor transmits a response to the at least one sensor unit with the second wireless device, the response including time-related information indicating when the at least one sensor unit is to obtain new data.

6. The system of claim 5, wherein the first wireless device receives the response from the second wireless device, and wherein the at least one sensor unit configures the timer interval of the time based on the time-related information in the response

7. The system of claim 1, wherein the at least one processing unit comprises:

at least one control unit having a communication interface; and

a computer communicatively coupled to the communication interface of the at least one control unit.

8. The system of claim 7, wherein the communication interface comprises an RS-485 interface.

9. The system of claim 8, further comprising a hub connected to the RS-485 interface of the control unit and connected to the computer via an RS-232 connection.

10. The system of claim 1, wherein the at least one sensor unit includes a plurality of sensor units, each of the sensor units having a different sensor identifier to differentiate the temperature and humidity data transmitted by each of the sensor units to the at least one processing unit.

11. The system of claim 10, wherein the at least one processing unit includes a plurality of control units, each of the control units having one or more of the sensor units associated thereto, each of the second wireless devices configured for one of a plurality of wireless frequencies, whereby the first wireless devices of the sensor units associated with a given one of the control units is configured for the same wireless frequency as the given one of the control units.

12. The system of claim 1, wherein the at least one processing unit comprises an algorithm for determining the probability of mold growth based on the temperature data, the humidity data, and the time data related to the time interval.

13. The system of claim 12, wherein the algorithm is configured to:

determine whether the temperature data and the humidity data fall within conditions detrimental to mold growth,

determine a decrement value based on the detrimental conditions, and

decrease a previous probability of mold growth by the decrement value to produce a current probability of mold growth.

14. The system of claim 12, wherein the algorithm is configured to:

determine whether the temperature data and the humidity data fall within conditions conducive to mold growth,

determine an incremental value based on the conducive conditions, and

increase a previous probability of mold growth by the incremental value to produce a current probability of mold growth.

15. A wireless sensor unit for an environmental monitoring system, comprising:

control circuitry having a timer;

wireless communication circuitry communicatively coupled to the control circuitry;

one or more sensors communicatively coupled to the control circuitry to obtain temperature data and humidity data,

wherein the control circuitry is configured to;

obtain temperature data and humidity data with the one or more sensors at a first time value of the timer;

transmit the obtained temperature data and humidity data via the wireless communication circuitry; and

process an acknowledgment if received with the wireless communication circuitry in response to the transmitted temperature data and humidity data.

16. The wireless sensor unit of claim 15, wherein the control circuitry comprises a microcontroller having the timer integrated therein.

17. The wireless sensor unit of claim 15, wherein the wireless communication circuitry comprises:

a wireless transceiver; and

an antenna communicatively coupled to the wireless transceiver.

18. The wireless sensor unit of claim 15, wherein to process the acknowledgment, the control circuitry is configured to determine if a first identifier in the acknowledgment matches a second identifier assigned to the wireless sensor unit.

19. The wireless sensor unit of claim 15, wherein to process the acknowledgment, the control circuitry is configured to:

obtain a second time value from the acknowledgment, and

assign the second time value to the timer.

20. The wireless sensor unit of claim 19, further comprising a battery supplying power to the wireless sensor unit, wherein the control circuitry is configured to operate in a low power mode until the second time value assigned to the timer.

21. The wireless sensor unit of claim 19, wherein the control circuitry is further configured to:

obtain temperature and humidity data with the one or more sensors at the second time value of the timer;

transmit the obtained temperature and humidity data via the wireless communication circuitry; and

process another acknowledgment if received with the wireless communication circuitry in response to the transmitted temperature and humidity data.

22. The wireless sensor unit of claim 15, wherein to transmit the obtained temperature and humidity data via the wireless communication circuitry, the control circuitry is configured to transmit a signal with the wireless communication circuitry at a predefined wireless frequency assigned to a designated receiver.

23. The wireless sensor unit of claim 15, wherein to transmit the obtained temperature and humidity data via the wireless communication circuitry, the control circuitry is configured to transmit a signal with the wireless communication circuitry, the signal including an assigned identifier for the wireless sensor unit.

24. The wireless sensor unit of claim 23, wherein to transmit the obtained temperature and humidity data via the wireless communication circuitry, the control circuitry is configured to construct the signal having the assigned identifier, the first time value, a temperature value, a humidity value, and a battery status.

25. The wireless sensor unit of claim 15, wherein control circuitry is configured to:

wait to receive the acknowledgment with the wireless device for a waiting period; and

retransmit the obtained temperature and humidity data via the wireless device at least one time if the acknowledgment is not received after the waiting period.

26. A wall-mountable sensor unit for an environmental monitoring system, comprising:

an electronics assembly having at least one sensor and having wireless communication circuitry to transmit data obtain with the at least one sensor;

a housing containing the electronics assembly; and

a mounting assembly at least including;

a base member defining a passage therethrough and having sides clamping to a hole in a wall; and

a holding member attachable to the base member and having a plurality of legs, the legs attaching to the housing containing the electronics assembly and positioning the housing through the passage of the base member to hold the electronics assembly in the hole in the wall.

27. The wall-mountable sensor unit of claim 26, wherein the electronics assembly comprises:

a circuit board having a front face and a back face, the at least one sensor attached to the back face of the circuit board; and

an antenna attached to the front face of the circuit board and electrically coupled to the wireless communication circuitry on the circuit board,

wherein the circuit board mounts in the housing and the housing attaches to the legs of the holding member such that the antenna faces outside the hole in the wall and the at least one sensor faces inside the hole in the wall.

28. The wall-mountable sensor unit of claim 26, wherein the housing removably snap fits to the legs of the holding member.

29. The wall-mountable sensor unit of claim 26, wherein the base member comprises:

a first face portion;

a narrow portion connected to the first face portion and being positionable in the hole of the wall; and

at least two ears moveable on sides of the narrow portion, the ears being moveable on the sides of the narrow portion and clamping the wall between the ears and the first face portion to hold the base member to the hole.

30. The wall-mountable sensor unit of claim 29, wherein the holding member comprises a second face portion having the plurality of legs connected thereto, the second face portion of the holding member attaching to the first face portion of the base member.

31. The wall-mountable sensor unit of claim 30, further comprising a cover plate snap fitting to the second face portion of the holding member exposed outside the hole of the wall.

32. An electronic environmental monitoring method, comprising:

obtaining temperature data and humidity data for an environment at time intervals at a plurality of sources;

wirelessly transmitting the obtained temperature data and humidity data from the sources;

receiving the transmitted temperature data and humidity data at at least one destination associated with the plurality of sources;

wirelessly transmitting acknowledgments from the at least one destination to the sources in response to receiving the transmitted temperature data and humidity data; and

processing the received temperature data and humidity data based on time data related to the time intervals.

33. The method of claim 32, wherein the act of processing the received temperature data and humidity data based on time data related to the time intervals comprises determining a probability of mold growth using the temperature data, the humidity data, and the time data in conjunction with stored information on mold growth.

34. The method of claim 33, wherein the stored information on mold growth comprises an equation defining an envelope based on temperature, humidity, and one or more species of mold, the envelope substantially separating conditions detrimental to mold growth from conditions conducive to mold growth for the species of mold.

35. The method of claim 33, wherein the act of determining the probability of mold growth comprises:

determining whether the temperature data and the humidity data fall within conditions detrimental to mold growth;

determining a decrement value based on the detrimental conditions; and

decreasing a previous probability of mold growth by the decrement value to produce a current probability of mold growth.

36. The method of claim 33, wherein the act of determining the probability of mold growth comprises:

determining whether the temperature data and the humidity data fall within conducive conditions to mold growth;

determining an incremental value based on the conducive conditions; and

increasing a previous probability of mold growth by the incremental value to produce a current probability of mold growth.

37. The method of claim 32, wherein the act of wirelessly transmitting the obtained temperature data and humidity data from the sources comprise wirelessly transmitting signals at a predefined wireless frequency assigned to the at least one destination.

38. The method of claim 32, wherein the act of wirelessly transmitting the obtained temperature data and humidity data from the sources comprise wirelessly transmitting signals having different identifiers for each of the sources to differentiate the transmitted signals at the at least one destination.

39. The method of claim 32, wherein the act of wirelessly transmitting acknowledgments from the at least one destination to the sources in response to receiving the transmitted temperature data and humidity data comprises constructing the acknowledgments to include time values for the time intervals of each of the sources to obtain data and to include identifiers assigned to each of the sources.