Hot plate precipitation measuring system

• US 6,675,100 B1
• Filed: 02/18/2003
• Issued: 01/06/2004
• 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:
  US10/368,509
• Time in Patent Office: 322 Days
• Field of Search: 702/130, 702/3, 731/701.6, 731/701.7, 731/701.8, 731/701.9, 731/702.1, 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 precipitation measuring system comprising:

a plurality of sensors that each include a first plate exposed to precipitation and a second plate not exposed to the precipitation and that are each configured to maintain the first plate and the second plate at a substantially constant temperature and transfer data that indicates a difference in power consumption between the first plate and the second plate; and

a remote processor configured to receive and process the data that indicates the difference in power consumption to determine precipitation rates at each of the sensors.

2. The precipitation measuring system of claim 1 wherein the data that indicates the difference in power consumption comprises data that indicates power consumption for the first plate and power consumption for the second plate.

3. The precipitation measuring system of claim 1 wherein the data that indicates the difference in power consumption comprises data that indicates current draw for the first plate and current draw for the second plate.

4. The precipitation measuring system of claim 1 wherein the sensors are each configured to time stamp the data.

5. The precipitation measuring system of claim 1 wherein the sensors are each configured to determine atmospheric temperatures and wherein the data indicates the atmospheric temperatures.

6. The precipitation measuring system of claim 5 wherein the remote processor is configured to receive and process the data to determine wind speed for at least one of the sensors.

7. The precipitation measuring system of claim 1 wherein the sensors are each configured to determine radiation levels and wherein the data indicates the radiation levels.

8. The precipitation measuring system of claim 7 wherein the remote processor is configured to adjust the data indicating the difference in power consumption responsive to the radiation levels.

9. The precipitation measuring system of claim 1 wherein the remote processor is configured to determine an adjustment to the substantially constant temperature for one of the sensors responsive to the precipitation rate at the one sensor.

10. The precipitation measuring system of claim 1 further comprising communication links configured to transport the data between the sensors and the remote processor.

11. A method of operating a precipitation measuring system that includes a plurality of sensors that each include a first plate exposed to precipitation and a second plate not exposed to the precipitation, the method comprising:

in the sensors, maintaining the first plate and the second plate at a substantially constant temperature;

transferring data from the sensors to a remote processor wherein the data indicates a difference in power consumption between the first plate and the second plate; and

in the remote processor, processing the data that indicates the difference in power consumption to determine precipitation rates at each of the sensors.

12. The method of claim 11 wherein the data that indicates the difference in power consumption comprises data that indicates power consumption for the first plate and power consumption for the second plate.

13. The method of claim 11 wherein the data that indicates the difference in power consumption comprises data that indicates current draw for the first plate and current draw for the second plate.

14. The method of claim 11 further comprising time stamping the data.

15. The method of claim 11 further comprising, in the sensors, determining atmospheric temperatures and wherein the data indicates the atmospheric temperatures.

16. The method of claim 15 further comprising, in the remote processor, processing the data to determine wind speed for at least one of the sensors.

17. The method of claim 11 further comprising, in the sensors, determining radiation levels and wherein the data indicates the radiation levels.

18. The method of claim 17 further comprising, in the remote processor, adjusting the data indicating the difference in power consumption responsive to the radiation levels.

19. The method of claim 11 further comprising, in the remote processor, determining an adjustment to the substantially constant temperature for one of the sensors responsive to the precipitation rate at the one sensor.

20. The method of claim 11 wherein transferring the data from the sensors to the remote processor comprises transferring the data over communication links.

21. A product for a precipitation measuring system comprising a remote processor and a plurality of sensors that each include a first plate exposed to precipitation and a second plate not exposed to the precipitation and that are each configured to maintain the first plate and the second plate at a substantially constant temperature and transfer data to the remote processor that indicates a difference in power consumption between the first plate and the second plate, the product comprising:

processing instructions configured to direct the remote processor to process the data that indicates the difference in power consumption to determine precipitation rates at each of the sensors; and

a storage medium configured to store the processing instructions.

22. The product of claim 21 wherein the data that indicates the difference in power consumption comprises data that indicates power consumption for the first plate and power consumption for the second plate.

23. The product of claim 21 wherein the data that indicates the difference in power consumption comprises data that indicates current draw for the first plate and current draw for the second plate.

24. The product of claim 21 wherein the sensors are each configured to determine atmospheric temperatures, wherein the data indicates the atmospheric temperatures, and wherein the processing instructions are configured to direct the remote processor to process the data to determine wind speed for at least one of the sensors.

25. The product of claim 21 wherein the sensors are each configured to determine radiation levels, wherein the data indicates the radiation levels, and wherein the processing instructions are configured to direct the remote processor to adjust the data indicating the difference in power consumption responsive to the radiation levels.

26. The product of claim 21 wherein the processing instructions are configured to direct the remote processor to determine an adjustment to the substantially constant temperature for one of the sensors responsive to the precipitation rate at the one sensor.