Apparatus and methods for snow and ice detection and removal on a communication antenna

• US 8,305,277 B2
• Filed: 05/07/2010
• Issued: 11/06/2012
• Est. Priority Date: 05/07/2010
• Status: Active Grant

• Current Assignee: Dish Technologies LLC (Dish Network Corporation)
• Original Assignee: Echostar Technologies LLC (Echostar Corporation)
• Inventors: Reams, William
• Primary Examiner(s): Le, Hoanganh
• Application Number:
  US12/776,152
• Publication Number:
  US 20110273344A1
• Time in Patent Office: 914 Days
• Field of Search: 343/704, 343/840
• US Class Current: 343/704
• CPC Class Codes: H01Q 1/02 Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
• CPC Class Codes: H01Q 19/13 the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination H01Q19/15 takes precedence

Abstract

A method of detecting and removing ice and/or snow on a communication antenna is presented. In the method, environmental data indicating at least one current environmental condition is received. An optical signal is transmitted from a signaling structure of the communication antenna toward a reflecting surface of the antenna. The optical signal is received at the signaling structure upon returning from the reflecting surface. The returning optical signal is then processed to determine at least one characteristic value of the returning optical signal. The reflecting surface is then heated if the environmental data indicates that ice or snow accumulation on the communication antenna is possible, and the at least one characteristic value of the returning optical signal is outside a predetermined range.

Claims

1. A method of detecting and removing snow and/or ice on a communication antenna, the method comprising:

receiving environmental data indicative of at least one current environmental condition affecting the communication antenna;

transmitting an optical signal from a signaling structure of the communication antenna toward a reflecting surface of the communication antenna;

receiving the optical signal at the signaling structure upon returning from the reflecting surface;

processing the returning optical signal to determine at least one characteristic value of the returning optical signal; and

heating the reflecting surface if the environmental data indicates that ice or snow accumulation on the communication antenna is possible, and the at least one characteristic value of the returning optical signal is outside a first range.

2. The method of claim 1, wherein:

the environmental data is generated by an electronic device not dependent upon the communication antenna for communication.

3. The method of claim 1, further comprising:

ceasing the heating of the reflecting surface when the at least one characteristic value of the returning optical signal is within a second range or the reflecting surface has been heated for at least a first length of time.

4. The method of claim 3, further comprising:

waiting at least a second length of time after ceasing the heating of the reflecting surface until heating the reflecting surface again based on the environmental data and the at least one characteristic value of the returning optical signal.

5. The method of claim 1, further comprising:

heating the signaling structure while heating the reflecting surface.

6. The method of claim 1, wherein:

the at least one current environmental condition comprises a current temperature of a geographical area including the communication antenna; and

heating the reflecting surface occurs if the at least one characteristic value of the returning optical signal is outside the first range, and the environmental data indicative of the current temperature is below a first level.

7. The method of claim 6, wherein:

the at least one current environmental condition comprises a current humidity of air of the geographical area including the communication antenna; and

heating the reflecting surface occurs if the at least one characteristic value of the returning optical signal is outside the first range, the environmental data indicative of the current temperature is below the first level, and the environmental data indicative of the current humidity is above a second level.

8. The method of claim 6, wherein:

the at least one current environmental condition comprises a trend in a barometric air pressure of the geographical area including the communication antenna; and

heating the reflecting surface occurs if the at least one characteristic value of the returning optical signal is outside the first range, the environmental data indicative of the current temperature is below the first level, and the environmental data indicative of the trend in the barometric air pressure is negative.

9. The method of claim 1, wherein:

the transmitted optical signal comprises an infrared optical signal.

10. The method of claim 1, wherein:

the at least one characteristic of the returning optical signal comprises a strength of the returning optical signal at one or more frequencies;

the transmitted optical signal comprises at least one frequency at which the strength of the returning optical signal is attenuated in the presence of ice or snow covering the reflecting surface; and

processing the returning optical signal to determine the at least one characteristic of the returning optical signal comprises determining a strength of the returning optical signal at each of the one or more frequencies.

11. A communication antenna, comprising:

a signaling structure comprising;

circuitry configured to perform at least one of;

receive a communication signal wirelessly and transfer the communication signal to an electronic device coupled with the antenna; and

receive the communication signal from the electronic device and transmit the communication signal wirelessly;

a reflecting structure coupled with the signaling structure, wherein the reflecting structure comprises a reflecting surface configured to redirect the communication signal received from or transmitted to the signaling structure circuitry;

a heating element configured to heat the reflecting surface; and

an optical signal transmitter and an optical signal receiver attached to the signaling structure, wherein the optical signal transmitter is configured to transmit an optical signal toward the reflecting surface so that it may be received at the optical signal receiver;

wherein the signaling structure further comprises control circuitry configured to;

receive environmental data indicative of at least one current environmental condition;

process the optical signal received at the optical signal receiver to determine at least one characteristic of the received optical signal; and

cause the heating element to heat the reflecting surface if the environmental data indicates that ice or snow accumulation on the reflecting structure is possible, and the at least one characteristic of the received optical signal is outside a first range.

12. The communication antenna of claim 11, wherein:

the current environmental condition comprises a current temperature of a geographical area associated with the communication antenna.

13. The communication antenna of claim 11, wherein:

the environmental data is originated by a second electronic device not transmitting the communication signal to, or receiving the communication signal from, the signaling structure circuitry.

14. The communication antenna of claim 13, wherein:

the control circuitry is configured to receive the environmental data indicative of the current temperature from the second electronic device via the first electronic device and the signaling structure circuitry.

15. The communication antenna of claim 13, further comprising:

a communication interface configured to receive the environmental data indicative of the current temperature from the second electronic device and transfer the environmental data indicative of the current temperature to the control circuitry.

16. The communication antenna of claim 11, wherein:

the optical signal comprises at least one frequency;

the at least one characteristic of the received optical signal is the amplitude of at least one frequency of the received optical signal; and

the amplitude of the received optical signal is less at one or more frequencies when the reflecting surface is covered with snow or ice than when the reflecting surface is not covered with snow or ice.

17. The communication antenna of claim 11, wherein:

the heating element is located adjacent the reflecting surface opposite the signaling structure.

18. The communication antenna of claim 11, wherein:

the heating element is configured to heat at least a portion of the signaling structure;

wherein the control circuitry is configured to cause the heating element to heat the signaling structure at the same time the heating element heats the reflecting surface.

19. A communication receiver, comprising:

a signal interface configured to receive a communication signal from a communication antenna; and

control circuitry configured to;

receive a current temperature associated with the communication antenna;

receive an indication as to whether a reflecting surface of the communication antenna is obscured with ice or snow; and

transmit a control signal via the signal interface to the communication antenna to cause the communication antenna to heat the reflecting surface if the current temperature is below a predetermined value and the indication indicates that the reflecting surface is obscured with ice or snow.

20. The communication receiver of claim 19, further comprising:

a communication interface configured to receive the indication of the current temperature from a weather information monitoring device.

21. The communication receiver of claim 19, further comprising:

a user interface configured to receive user input to transmit the control signal via the signal interface to the communication antenna to cause the communication antenna to heat the reflecting surface regardless of the indication of the current temperature and the indication as to whether the reflecting surface is obscured with ice or snow.

22. The communication receiver of claim 19, wherein:

the control circuitry is further configured to receive an indication of a strength of the communication signal, and to prevent the heating of the reflecting surface if the indication of the strength of the communication signal is above a first level.