Method and apparatus implementing a scan strategy for automatic high power tube recovery

• US 20080012757A1
• Filed: 07/12/2006
• Published: 01/17/2008
• Est. Priority Date: 07/12/2006
• Status: Active Grant

• Current Assignee: Enterprise Electronics
• Original Assignee: Enterprise Electronics
• Inventors: Stagliano, James J., Alford, James Larry, Helvin, James Rogers, Nelson, Dean A.
• Granted Patent: US 7,369,082 B2
• Time in Patent Office: Days
• US Class Current: 342/26R
• CPC Class Codes: G01S 13/95 for meteorological use
• CPC Class Codes: G01S 7/282 Transmitters
• CPC Class Codes: G01S 7/4008 of transmitters
• CPC Class Codes: Y02A 90/10 Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

A method of reducing power to an electron emitting cathode comprises the steps of sensing a weather condition; calculating a condition number based upon the weather condition; comparing the condition number to a threshold; and reducing the power to the electron emitting cathode when the condition number is greater than the threshold. The apparatus and method may be implemented upon a system having a high voltage power source, an RF tube, a control processor, and a signal processor.

Claims

1. A method of reducing power to an electron emitting cathode in a weather radar system, comprising the steps of:

a. sensing a weather condition within a distance of said weather radar system;

b. calculating a condition number based upon said weather condition;

c. comparing said condition number to a threshold; and

d. reducing the power to said electron emitting cathode when said condition number is greater than said threshold.

2. The method of claim 1, wherein said sensing step further comprises sampling a plurality of weather conditions.

3. The method of claim 2, wherein said calculating step further comprises balancing said samples of said plurality of weather conditions against a plurality of user defined threshold values such that the number of said samples is equal to the number of said plurality of user defined threshold values.

4. The method of claim 3, further comprising balancing each of said samples of said plurality of weather conditions against a corresponding one of said plurality of user defined threshold values.

5. The method of claim 4, wherein said balancing step further comprises incrementing said condition number by a unit value when the value of one of said samples of said plurality of weather conditions is greater than a corresponding value of one of said plurality of sensor threshold values.

6. The method of claim 4, wherein said balancing step further comprises incrementing said condition number by an amount proportional to the difference between the value of one of said samples of said plurality of weather conditions and a corresponding value of one of said plurality of sensor threshold values.

7. The method of claim 1 wherein said reducing step further comprises reducing the power to said electron emitting device to 50% of the maximum power of said electron emitting device.

8. The method of claim 7, further comprising the step of lowering said threshold after said reducing step.

9. The method of claim 8, further comprising the step of increasing the power to said electron emitting cathode when said condition number falls below said lowered threshold.

10. The method of claim 9, further comprising the step of returning said threshold to the original value of said threshold when said power is increased.

11. The method of claim 7, further comprising the step of further reducing the power to said electron emitting cathode when said condition number remains greater than said threshold.

12. The method of claim 1 wherein said reducing step further comprises reducing the power by an amount proportional to the difference between said threshold and said condition number.

13. A system for controlling the power to an electron emitting cathode in a weather radar system;

comprising;

a. an antenna configured to sense weather conditions;

b. comparators configured to compare said weather conditions to a plurality of threshold values and to output a threshold indicia;

c. a summing block configured to sum said threshold indicia, said sum of said threshold indicia being a condition number; and

d. a power level decision block configured to receive said condition number and to compare said condition number to a threshold to determine a power level for said electron emitting cathode.

14. The system of claim 13, wherein said comparators are further configured to increment said condition number by a unit value when the value of one of said weather conditions from said plurality of sensors is greater than a corresponding value of one of said plurality of sensor threshold values.

15. The system of claim 13 wherein said comparators are further configured to increment said condition number by an amount proportional to the difference between the value of one of said weather conditions of said plurality of sensors and a corresponding value of one of said plurality of sensor threshold values.

16. The system of claim 13, wherein said power level decision block is configured to reduce the power to said electron emitting device to 50% of the maximum power of said electron emitting device when said condition number is greater than said threshold.

17. The system of claim 16, wherein said power level decision block is further configured to lower said threshold when the power to said electron emitting device has been reduced.

18. The system of claim 17, wherein said power level decision block is further configured to increase the power to said electron emitting cathode when said condition number falls below said lowered threshold.

19. The system of claim 18, wherein said power level decision block is further configured to return said threshold to the original value of said threshold when said power is increased.

20. The system of claim 16, wherein said power level decision block is further configured to further reduce the power to said electron emitting cathode when said condition number remains greater than said threshold.

21. The system of claim 13 wherein said power level decision block is configured to set the power to said electron emitting cathode by an amount proportional to the difference between said threshold and said condition number.

22. A data structure for controlling the power to an electron emitting cathode, comprising:

a. a set of weather conditions;

b. a set of weather condition thresholds;

c. a comparator configured to compare said set of weather conditions to said set if weather condition thresholds, said comparator further configured to output a threshold indicia vector;

d. a summing block configured to sum said threshold indicia vector, said sum being a condition number; and

e. a power level decision block configured to receive said condition number and to compare said condition number to a threshold to determine a power level for said electron emitting cathode.

23. The structure of claim 22, wherein said comparator is further configured to increment said condition number by a unit value when a value of one element of said set of weather conditions is greater than a corresponding value of one element of said set of weather condition thresholds.

24. The structure of claim 22 wherein said comparators are further configured to increment said condition number by an amount proportional to the difference between a value of one element of said set of weather conditions and a corresponding value of one element of said set of weather condition thresholds.

25. The structure of claim 22, wherein said power level decision block is configured to reduce the power to said electron emitting device to 50% of the maximum power of said electron emitting device when said condition number is greater than said threshold.

26. The structure of claim 25, wherein said power level decision block is further configured to lower said threshold when the power to said electron emitting device has been reduced.

27. The structure of claim 26, wherein said power level decision block is further configured to increase the power to said electron emitting cathode when said condition number falls below said lowered threshold.

28. The structure of claim 27, wherein said power level decision block is further configured to return said threshold to the original value of said threshold when said power is increased.

29. The structure of claim 25, wherein said power level decision block is further configured to further reduce the power to said electron emitting cathode when said condition number remains greater than said threshold.

30. The structure of claim 22 wherein said power level decision block is configured to set the power to said electron emitting cathode by an amount proportional to the difference between said threshold and said condition number.