Hot plate precipitation measuring system

• US 6,714,869 B1
• Filed: 02/18/2003
• Issued: 03/30/2004
• Est. Priority Date: 09/13/1999
• Status: Expired due to Term

• Current Assignee: Board of Regents Nevada System of Higher Education (State of Nevada), University Corporation For Atmospheric Research
• Original Assignee: Board of Regents Nevada System of Higher Education (State of Nevada), University Corporation For Atmospheric Research
• Inventors: Rasmussen, Roy Martin, Hallett, John
• Primary Examiner(s): SHAH, KAMINI S
• Application Number:
  US10/368,504
• Time in Patent Office: 406 Days
• Field of Search: 702/3, 702/130, 731/701--17, 356/336, 356/338, 356/342
• US Class Current: 702/3
• CPC Class Codes: G01W 1/14 Rainfall or precipitation gauges measuring volume in general G01F

Abstract

A precipitation measuring system comprising a top thermal plate positioned to maximize exposure to falling precipitation and includes at least one ridge circumscribing the top surface for capturing precipitation. A second thermal plate is positioned under the top thermal plate to protect it from falling precipitation while still exposing it to the same atmospheric temperature and wind conditions. At least one solar radiation sensor is connected to the precipitation measuring system to measure solar radiation contacting at least one of the top and bottom thermal plates. During a precipitation event, the top and bottom thermal plates are maintained at a constant temperature and a power consumption curve for each thermal plate is quantified. The precipitation rate is measured by the difference in the power consumption curve for the top thermal plate and the power consumption curve for the bottom thermal plate.

Claims

1. A wind speed measuring system comprising:

a plate exposed to wind but not exposed to precipitation; and

a processing and control system configured to maintain the plate at a substantially constant temperature and determine wind speed responsive to an atmospheric temperature and maintaining the plate at the substantially constant temperature.

2. The wind speed measuring system of claim 1 further comprising a temperature sensor configured to determine the atmospheric temperature.

3. The wind speed measuring system of claim 2 wherein the processing and control system is configured to adjust the substantially constant temperature responsive to the atmospheric temperature.

4. The wind speed measuring system of claim 1 wherein maintaining the plate at the substantially constant temperature consumes an amount of power and the processing and control system is configured determine the wind speed responsive to the amount of power relative to the atmospheric temperature.

5. The wind speed measuring system of claim 1 wherein the plate comprises a second plate, wherein the wind speed measuring system further comprises a first plate exposed to the precipitation, and wherein the processing and control system is configured to maintain the first plate and the second plate at the substantially constant temperature and determine a precipitation rate responsive to maintaining the first plate and the second plate at the substantially constant temperature.

6. The wind speed measuring system of claim 5 wherein maintaining the first plate and the second plate at the substantially constant temperature indicates a difference in power consumption between the first plate and the second plate and wherein the processing and control system is configured to determine the precipitation rate responsive to the difference in power consumption between the first plate and the second plate.

7. The wind speed measuring system of claim 5 wherein the first plate is positioned to protect the second plate from the precipitation.

8. The wind speed measuring system of claim 5 wherein the processing and control system is configured to adjust the substantially constant temperature responsive to the precipitation rate.

9. The wind speed measuring system of claim 1 further comprising a radiation sensor configured to detect radiation.

10. The wind speed measuring system of claim 1 further comprising a precipitation sensor configured to turn the wind speed measuring system on during a precipitation event and turn the wind speed measuring system off after the precipitation event.

11. A method of measuring wind speed wherein a plate is exposed to wind but not exposed to precipitation, the method comprising:

maintaining the plate at a substantially constant temperature; and

determining the wind speed responsive to an atmospheric temperature and maintaining the plate at the substantially constant temperature.

12. The method of claim 11 further comprising determining the atmospheric temperature.

13. The method of claim 12 further comprising adjusting the substantially constant temperature responsive to the atmospheric temperature.

14. The method of claim 11 wherein maintaining the plate at the substantially constant temperature consumes an amount of power and wherein determining the wind speed responsive to the atmospheric temperature and maintaining the plate at the substantially constant temperature comprises determining the wind speed responsive to the amount of power relative to the atmospheric temperature.

15. The method of claim 11 wherein the plate comprises a second plate, wherein a first plate is exposed to the precipitation, and further comprising:

maintaining the first plate and the second plate at the substantially constant temperature; and

determining a precipitation rate responsive to maintaining the first plate and the second plate at the substantially constant temperature.

16. The method of claim 15 wherein maintaining the first plate and the second plate at the substantially constant temperature indicates a difference in power consumption between the first plate and the second plate and wherein determining the precipitation rate responsive to maintaining the first plate and the second plate at the substantially constant temperature comprises determining the precipitation rate responsive to the difference in power consumption between the first plate and the second plate.

17. The method of claim 15 wherein the first plate is positioned to protect the second plate from the precipitation.

18. The method of claim 15 further comprising adjusting the substantially constant temperature responsive to the precipitation rate.

19. The method of claim 15 further comprising detecting radiation.

20. The method of claim 11 wherein maintaining the plate at the substantially constant temperature comprises maintaining the plate at the substantially constant temperature during a precipitation event and not maintaining the plate at the substantially constant temperature after the precipitation event.

21. A product for a wind speed measuring system comprising a processor and a plate that is exposed to wind but that is not exposed to precipitation, wherein the wind speed measuring system maintains the plate at a substantially constant temperature, the product comprising:

processing instructions configured to direct the processor to determine wind speed responsive to an atmospheric temperature and maintaining the plate at the substantially constant temperature; and

a storage medium configured to store the processing instructions.

22. The product of claim 21 wherein maintaining the plate at the substantially constant temperature consumes an amount of power and wherein the processing instructions are configured to direct the processor to determine the wind speed responsive to the amount of power relative to the atmospheric temperature.

23. The product of claim 21 wherein the plate comprises a second plate, wherein a first plate is exposed to the precipitation, wherein the wind speed measuring system maintains the first plate and the second plate at the substantially constant temperature, and wherein the processing instructions are configured to direct the processor to determine a precipitation rate responsive to maintaining the first plate and the second plate at the substantially constant temperature.

24. The product of claim 23 wherein maintaining the first plate and the second plate at the substantially constant temperature indicates a difference in power consumption between the first plate and the second plate and wherein the processing instructions are configured to direct the processor to determine the precipitation rate responsive to the difference in power consumption between the first plate and the second plate.

25. The product of claim 23 wherein the processing instructions are configured to direct the processor to adjust the substantially constant temperature responsive to the precipitation rate.

26. The product of claim 21 wherein the processing instructions are configured to direct the processor to adjust the substantially constant temperature responsive to the atmospheric temperature.