Real-time parameter sensor-transmitter

• US 4,268,818 A
• Filed: 03/20/1978
• Issued: 05/19/1981
• Est. Priority Date: 03/20/1978
• Status: Expired due to Term

• Current Assignee: Murray W. Davis
• Original Assignee: Matthew J. Diedzic, Murray W. Davis
• Inventors: Davis, Murray W., Whitney, Bruce F., Knapp, Robert F., Diedzic, Matthew J.
• Primary Examiner(s): Groody, James J.
• Application Number:
  US05/888,143
• Time in Patent Office: 1,156 Days
• Field of Search: 340/177 R, 340/310 R, 340/207 R, 340/207 P, 73/362 R, 73/342, 174/146, 324/127, 324/126, 455/612
• US Class Current: 340/870.38
• CPC Class Codes: G01K 1/024 for remote indication

Abstract

Apparatus for directly monitoring the conductor temperature or other parameters of an energized electric power line conductor, or of the medium adjacent the conductor, on a real time basis, and transmitting a signal indicative of that parameter to a remote location such as to facilitate data processing by computer. The apparatus is powered by the electric or electromagnetic field of the electric power line conductor.

Various embodiments are described for sensing the temperature or other parameter being monitored. Furthermore two techniques are described for transmitting the signal to a remote location. The first such technique is the use of air as the transmission medium and the second technique uses the power line conductor itself as the transmission medium.

Claims

1. In an apparatus for directly measuring at least one parameter of an electrically energized alternating current carrying conductor and including a transmitter for continuously transmitting a signal proportional to said parameter, the improvement comprising:

means including a plurality of turns of wire wound around a mandrel for receiving only induced energy from said energized conductor for energizing said transmitter,

said plurality of turns of wire formed as the secondary winding of an air core transformer; and

said mandrel is at the same electrical potential as said conductor.

2. The invention as defined in claim 1 wherein the magnetic field of said conductor induces an electric current in said transmitter energizing means.

3. The invention as defined in claim 1 wherein the parameter being measured is the temperature of said conductor.

4. The invention as defined in claim 3 wherein the temperature is directly measured by a thermocouple.

5. In an apparatus for directly measuring at least one parameter of a conductor carrying an alternating current and including a transmitter for continuously transmitting a signal representative of said parameter, the improvement comprising:

transducer means electrically insulated from said conductor for directly sensing the parameter of said conductor to be measured;

said transducer sensing means being electrically coupled to said transmitter; and

means suspended from said conductor and responsive to the alternating current carried by said conductor, and receiving an induced current therefrom, for powering said transmitter.

6. The invention as defined in claim 5 wherein said transducer sensing means is a thermocouple probe.

7. The invention as defined in claim 5 wherein said transducer sensing means is a fiber optic probe.

8. The invention as defined in claim 5 wherein said transmitter powering means also couples the output of said transmitter to said conductor for transmission along said conductor.

9. The invention as defined in claim 5 wherein said transmitter powering means includes:

a plurality of turns of wire formed as the secondary winding of an air core transformer having a current induced therein for powering said transmitter.

10. The invention as defined in claim 9 wherein said powering means further includes:

a mandrel secured to said conductor;

said mandrel having said plurality of turns of wire wound thereupon.

11. The invention as defined in claim 10 wherein said mandrel is also an antenna for said transmitter.

12. The invention as defined in claim 9 wherein said plurality of turns are connected as a single, continuous loop.

13. The invention as defined in claim 9 wherein said plurality of turns of wire are connected as multiple loops.

14. The invention as defined in claim 10 wherein said mandrel is also a support for said apparatus.

15. The invention as defined in claim 10 wherein said mandrel is at the same electrical potential as said conductor.

16. In an apparatus for directly measuring at least one parameter of a conductor carrying an alternating current and including a transmitter for continuously transmitting a signal representative of said parameter, the improvement comprising:

means for directly sensing a parameter of said conductor;

said sensing means being electrically coupled to said transmitter;

an elongated first hollow housing secured to said conductor, and having two spaced apart ends;

a second housing positioned between said ends of said first housing and supported thereby;

said transmitter positioned in said second housing; and

means positioned in said first and second housings and responsive to the alternating current carried by said conductor and receiving an induced current therefrom for powering said transmitter.

17. The invention as defined in claim 16 wherein said second housing is positioned away from said conductor to minimize the effect of electric and magnetic fields from said alternating current on said transmitter and on said transmitter powering means.

18. The invention as defined in claim 16 wherein said sensing means comprises:

a thermocouple probe electrically connected to said transmitter;

said thermocouple probe mounted in a shield and encapsulated therein by a thermally conductive, electrically insulating material.

19. The invention as defined in claim 18, wherein said thermocouple shield is helically wound around said conductor and enters said first housing at a first location, said shield being thereafter positioned internally of said first housing.

20. In an apparatus for directly measuring at least one parameter adjacent to an electrically energized alternating current carrying conductor and including a transmitter for continuously transmitting a signal proportional to said parameter, the improvement comprising:

means including a plurality of turns of wire wound around a mandrel for receiving only induced energy from said energized conductor for energizing said transmitter;

said plurality of turns of wire formed as the secondary winding of an air core transformer; and

said mandrel is at the same electrical potential as said conductor.

21. The invention as defined in claim 20 wherein the magnetic field of said conductor induces an electric current in said transmitter energizing means.

22. The invention as defined in claim 20, wherein the parameter being measured is the ambient temperature adjacent said conductor.

23. The invention as defined in claim 22 wherein the temperature is directly measured by a thermocouple.

24. In an apparatus for directly measuring at least one parameter adjacent a conductor carrying an alternating current and including a transmitter for continuously transmitting a signal representative of said parameter, the improvement comprising:

means electrically insulated from said conductor for directly sensing the ambient parameter to be measured;

said sensing means being electrically coupled to said transmitter;

means suspended from said conductor and responsive to the alternating current carried by said conductor, and receiving an induced current therefrom, for powering said transmitter.

25. The invention as defined in claim 24 wherein said sensing means is a thermocouple probe.

26. The invention as defined in claim 24 wherein said sensing means is a fiber optic probe.

27. The invention as defined in claim 24 wherein said transmitter powering means also couples the output of said transmitter to said conductor for transmission along said conductor.

28. The invention as defined in claim 24 wherein said transmitter powering means includes:

a plurality of turns of wire formed as the secondary winding of an air core transformer having a current induced therein for powering said transmitter.

29. The invention as defined in claim 28 wherein said powering means further includes:

a mandrel secured to said conductor;

said mandrel having said plurality of turns of wire wound thereon.

30. The invention as defined in claim 29 wherein said mandrel is also an antenna for said transmitter.

31. The invention as defined in claim 29 wherein said mandrel is at the same electrical potential as said conductor.

32. The invention as defined in claim 28 wherein said plurality of turns are connected as a single continuous loop.

33. The invention as defined in claim 28 wherein said plurality of turns of wire are connected as multiple loops.

34. The invention as defined in claim 29 wherein said mandrel is also a support for said apparatus.

35. In an apparatus for directly measuring at least one parameter adjacent a conductor carrying an alternating current and including a transmitter for continuously transmitting a signal representative of said parameter, the improvement comprising:

means for directly sensing the parameter adjacent said conductor;

said sensing means being electrically attached to said transmitter;

an elongated first hollow housing secured to said conductor, and having two spaced apart ends;

a second housing positioned between said ends of said first housing and supported thereby;

said transmitter positioned in said second housing; and

means positioned in said first and second housings and responsive to the alternating current carried by said conductor and receiving an induced current therefrom for powering said transmitter.

36. The invention as defined in claim 35 wherein said sensing means comprises:

a thermocouple probe electrically connected to said transmitter;

said thermocouple probe mounted in a shield.

37. The invention as defined in claim 35 wherein said second housing is positioned away from said conductor to minimize the effect of electric and magnetic fields from said alternating current on said transmitter and on said transmitter powering means.