Sensor array cable and fabrication method

• US 6,278,823 B1
• Filed: 03/09/1999
• Issued: 08/21/2001
• Est. Priority Date: 03/09/1999
• Status: Expired due to Term

• Current Assignee: Northrop Grumman Systems Corporation (Northrop Grumman Corporation)
• Original Assignee: Litton Systems Incorporated (Northrop Grumman Corporation)
• Inventors: Kaplan, Robert L., Briggs, William David, Griffin, Gary Thomas, Bevan, Dennis Patrick, Goldner, Eric Lee
• Primary Examiner(s): Healy, Brian
• Application Number:
  US09/265,746
• Time in Patent Office: 896 Days
• Field of Search: 385/12, 385/13, 385/14, 385/15, 385/31, 385/48, 385/88, 385/89, 385/92, 385/100, 385/103, 385/113, 385/101, 385/147, 385/123, 385/136-138
• US Class Current: 385/100
• CPC Class Codes: G01V 1/201 Constructional details of seismic cables, e.g. streamers integrated optoseismic systems G01V1/226; line connectors in general H01R, transducer mountings in general G10K11/004
• CPC Class Codes: G01V 1/3808 Seismic data acquisition, e.g. survey design
• CPC Class Codes: G02B 6/44528 Patch-cords; Connector arrangements in the system or in the box routing arrangements H04Q1/00
• CPC Class Codes: G02B 6/4469 Security aspects
• CPC Class Codes: G02B 6/4471 Terminating devices demountable connectors G02B6/3807; Cable clamps
• CPC Class Codes: G02B 6/562 locatable, e.g. using magnetic means

Abstract

A sensor array cable and method of construction thereof utilizing a sensor/interlink assembly to facilitate the relatively easy and inexpensive installation of a sensor device in a cable that includes a strength member to provide tensile strength to the cable, optical fibers or wires for carrying electrical or optical energy to and from the sensor device, and a protective outer jacket. A portion of the protective outer jacket is removed allowing access to the inner strength member and optical fibers. A segment of the strength member is removed and an interlink/sensor assembly is installed in its place. The interlink serves to maintain the tensile strength of the cable. Optical fibers and/or electrical wires are connected to the sensor device for operation. The interlink/sensor assembly and associated optical fibers and electrical wires are then enclosed in an overmold which is sealed to the outer protective jacket.

Claims

1. A sensor array cable comprising;

at least two strength member segments connected together through an interlink/sensor assembly;

said interlink/sensor assembly comprising an interlink and a sensor device;

at least one transmission medium segment connected to said sensor device.

2. The sensor array cable of claim 1 further comprising a protective jacket segment surrounding said strength member segments and transmission medium segments on either side of said interlink/sensor assembly.

3. The sensor array cable of claim 2 further comprising an overmold surrounding said interlink/sensor assembly and sealed to said protective jacket segments on either side of said interlink/sensor assembly.

4. The sensor array cable of claim 1 further comprising a clip on either side of said interlink/sensor assembly.

5. The sensor array cable of claim 1 wherein said strength member segments are metallic cord.

6. The sensor array of claim 1 wherein said strength member segments are synthetic cord.

7. The sensor array of claim 1 wherein said strength member segments are glass reinforced plastic.

8. The sensor array of claim 1 wherein said strength member segments are glass/resin composite structures.

9. The sensor array cable of claim 1 wherein said strength member segments are synthetic braid.

10. The sensor array cable of claim 1 wherein said strength member segment has an outer coating jacket.

11. The sensor array cable of claim 1,2,3,4,5,6,7,8, 9 or 10 wherein said interlink/sensor assembly is connected to said strength member segment through a terminus.

12. The sensor array cable of claim 1,2,3,4,5,6,7,8, 9 or 10 wherein said interlink/sensor assembly is connected to said strength member segment through a terminus which is a swage fitting.

13. The sensor array cable of claim 1,2,3,4,5,6,7,8, 9 or 10 wherein said interlink/sensor assembly is connected to said strength member segment through a terminus which is a wedge termination.

14. The sensor array cable of claim 1,2,3,4,5,6,7,8, 9 or 10 wherein said interlink/sensor assembly is connected to said strength member segment through a terminus which is a cast termination.

15. The sensor array cable of claim 1,2,3,4,5,6,7,8, 9 or 10 wherein said interlink/sensor assembly is connected to said strength member segment through a terminus which is a braided splice termination.

16. The sensor array cable of claim 1,2,3,4,5,6,7,8, 9 or 10 wherein said interlink/sensor assembly is connected to said strength member segment through a terminus which is a knot termination.

17. The sensor array cable of claim 1 wherein said transmission medium segment is electrical wiring.

18. The sensor array cable of claim 1 wherein said transmission medium segment is optical fiber.

19. The sensor array of claim 1 further comprising at least two transmission medium segments at least one of which is electrical wiring and at least one of which is optical fiber.

20. The sensor array cable of claim 18 or 19 wherein said optical fiber transmission medium segment is connected to said sensor device by fusion splicing.

21. The sensor array cable of claim 18 or 19 wherein said optical fiber transmission medium segment is connected to said sensor device by optical fiber connectors.

22. The sensor array cable of claim 1 wherein said interlink is an object defining a cavity and said sensor device occupies said cavity.

23. The sensor array cable of claim 22 wherein said cavity is an open cavity.

24. The sensor array cable of claim 22 wherein said cavity is a closed cavity.

25. The sensor array cable of claim 22,23 or 24 wherein said sensor device is attached to a wall of said cavity.

26. The sensor array cable of claim 1 wherein said interlink comprises at least two objects connected together so as to define a cavity, wherein said sensor device occupies said cavity.

27. The sensor array cable of claim 26 wherein said sensor device is contained within a hinged sleeve mount.

28. The sensor array cable of claim 1, 26 or 27 wherein said strength member segments are attached to said interlink by a termination link clamp.

29. The sensor array cable of claim 1 wherein said sensor device contains a cavity and said interlink occupies said cavity.

30. The sensor array cable of claim 29 wherein said cavity is an open cavity.

31. The sensor array cable of claim 29 wherein said cavity is a closed cavity.

32. The sensor array cable of claim 29,30 or 31 wherein said interlink is attached to a wall of said cavity.

33. The sensor array cable of claim 2 wherein said protective jacket segments are comprised of a plastic material.

34. The sensor array cable of claim 2 wherein said protective jacket segments are comprised of an elastomer such as rubber.

35. The sensor array cable of claim 3 wherein said overmold is a plastic material.

36. The sensor array cable of claim 3 wherein said overmold is an elastomer such as rubber.

37. The sensor array cable of claim 1 wherein said sensor device is a hydrophone.

38. The sensor array cable of claim 1 wherein said sensor device is a fiber optic hydrophone.

39. The sensor array cable of claim 1 wherein said sensor device is a piezoelectric hydrophone.

40. The sensor array cable of claim 1 wherein said sensor device is a telemetry module.

41. The sensor array cable of claim 40 wherein said telemetry module receives and amplifies an optical signal.

42. The sensor array cable of claim 40 wherein said telemetry module receives and amplifies an electrical signal.

43. The sensor array cable of claim 40 wherein said telemetry module receives and amplifies an electrical signal and an optical signal.

44. The sensor array cable of claim 1 wherein said sensor device comprises at least one non-acoustic sensor.

45. The sensor array cable of claim 1 wherein said sensor device is a thermal sensor.

46. The sensor array cable of claim 1 wherein said sensor device is a pressure sensor.

47. The sensor array cable of claim 1 wherein said sensor device is a magnetic heading sensor.

48. A method for installing a sensor device in a cable with a protective jacket segment surrounding at least one strength member segment and at least one transmission medium segment, comprising the steps of;

removing a portion of said protective jacket segment to expose a length of said strength member segment, a length of said at least one transmission medium segment, leaving a first protective jacket segment and a second protective jacket segment on either side of where said interior portion was;

removing a segment of said exposed strength member length resulting in two exposed strength member ends on either side of the removed segment;

attaching said exposed strength member ends to an interlink;

combining a sensor device with said interlink to form an interlink/sensor assembly;

connecting said sensor device to at least one of said exposed transmission medium segments.

49. The method for installing a sensor device in a cable of claim 48 further comprising the step of surrounding and containing said interlink/sensor assembly within an overmold.

50. The method for installing a sensor device in a cable of claim 49 further comprising the step of sealing said overmold to said first and second protective jacket segments.

51. The method for installing a sensor device in a cable of claim 48, 49 or 50 wherein said strength member segment has an outer coating jacket, further comprising the step of removing a portion of said outer coating jacket.

52. The method for installing a sensor device in a cable of claim 48, 49, or 50 wherein said interlink contains a cavity and said combination step comprises placing said sensor device in said cavity.

53. The method for installing a sensor device of claim 52 wherein said sensor device is attached to said interlink.

54. The method of installing a sensor device in a cable of claim 48, 49, or 50 wherein said sensor device contains a cavity and said combination step comprises placing said interlink in said cavity.

55. The method of installing a sensor device in a cable of claim 54 wherein said interlink is attached to said sensor device.

56. The method of installing a sensor device in a cable of claim 48, 49, or 50 wherein said interlink comprises at least two objects connected together so as to define a cavity, wherein said sensor device occupies said cavity.

57. The method of installing a sensor device in a cable of claim 56 wherein said sensor device is contained within a hinged sleeve mount.

58. The method of installing a sensor device in a cable of claim 48 wherein said strength member segments are attached to said interlink at a termination link clamp.

63. The method for installing a sensor device in a cable of claim 48 or 59 further comprising the step of terminating each of said exposed strength member ends with a terminus.

64. The method for installing a sensor device in a cable of claim 48 or 59 wherein the strength member is metallic cord further comprising the step of terminating said free ends with a swage fitting.

65. The method for installing a sensor device in a cable of claim 48 or 59 wherein the strength member is metallic cord further comprising the step of terminating said free ends with a threaded crimp fitting.

66. The method for installing a sensor device in a cable of claim 48 or 59 wherein the strength member is metallic cord further comprising the step of terminating said free ends with a compression fitting.

67. The method for installing a sensor device in a cable of claim 48 or 59 wherein the strength member is a synthetic cord or braid further comprising the step of terminating said free ends with a cast rope termination.

68. The method for installing a sensor device in a cable of claim 48 or 59 wherein the strength member is a synthetic cord or braid further comprising the step of terminating said free ends with a braided splice.

69. The method for installing a sensor device in a cable of claim 48 or 59 wherein the strength member is a synthetic cord or braid further comprising the step of terminating said free ends with a knot termination.

70. The method for installing a sensor device in a cable of claim 48 or 59 wherein the strength member is a metallic or synthetic cord or braid further comprising the step of terminating said free ends with a capstan.

71. The method for installing a sensor device in a cable of claim 49 or 60 wherein at least one transmission medium segment not connected to said sensor device is placed onto the surface of said interlink/sensor assembly prior to surrounding and containing said interlink/sensor assembly within an overmold.

72. The method for installing a sensor device in a cable of claim 48 or 59 further comprising the steps of placing at least one transmission medium segment not connected to said sensor device onto a surface of said interlink/sensor assembly, surrounding and containing said interlink/sensor assembly within a rigid tube having a hollow interior, and filling said hollow interior with an encapsulant.

73. The method for installing a sensor device in a cable of claim 48 or 59 wherein said transmission medium segment is electrical wiring.

74. The method for installing a sensor device in a cable of claim 48 or 59 wherein said transmission medium segment is optical fiber.

75. The method for installing a sensor device in a cable of claim 74 wherein said optical fiber transmission medium segment is connected to said sensor device by fusion splicing.

76. The method for installing a sensor device in a cable of claim 74 wherein said optical fiber transmission medium segment is connected to said sensor device by optical fiber connectors.

77. The method for installing a sensor device in a cable of claim 48 or 59 wherein at least two transmission medium segments are provided at least one of which is electrical wiring and at least one of which is optical fiber.

78. The method for installing a sensor device in a cable of claim 77 wherein said optical fiber transmission medium segment is connected to said sensor device by fusion splicing.

79. The method for installing a sensor device in a cable of claim 77 wherein said optical fiber transmission medium segment is connected to said sensor device by optical fiber connectors.

80. The method for installing a sensor device in a cable of claim 48 or 59 wherein said protective jacket segments are comprised of a plastic material.

81. The method for installing a sensor device in a cable of claim 48 or 59 wherein said protective jacket segments are comprised of an elastomer such as rubber.

82. The method for installing a sensor device in a cable of claim 49 or 60 wherein said overmold is a plastic material.

83. The method for installing a sensor device in a cable of claim 49 or 60 wherein said overmold is an elastomer such as rubber.

84. The method for installing a sensor device in a cable of claim 48 or 59 wherein said sensor device is a hydrophone.

85. The method for installing a sensor device in a cable of claim 48 or 59 wherein said sensor device is a fiber optic hydrophone.

86. The method for installing a sensor device in a cable of claim 48 or 59 wherein said sensor device is a piezoelectric hydrophone.

87. The method for installing a sensor device in a cable of claim 48 or 59 wherein said sensor device is a telemetry module.

88. The method for installing a sensor device in a cable of claim 87 wherein said telemetry module receives and amplifies an optical signal.

89. The method for installing a sensor device in a cable of claim 87 wherein said telemetry module receives and amplifies an electrical signal.

90. The method for installing a sensor device in a cable of claim 87 wherein said telemetry module receives and amplifies an electrical signal and an optical signal.

91. The method for installing a sensor device in a cable of claim 48 or 59 wherein said sensor device comprises at least one non-acoustic sensor.

92. The method for installing a sensor device in a cable of claim 48 or 59 wherein said sensor device is a thermal sensor.

93. The method for installing a sensor device in a cable of claim 48 or 59 wherein said sensor device is a pressure sensor.

94. The method for installing a sensor device in a cable of claim 48 or 59 wherein said sensor device is a magnetic heading sensor.

95. The method for installing a sensor device in a cable of claim 48 or 59 comprising the further step of placing a clip on either side of said interlink/sensor assembly.

96. The method for installing a sensor device in a cable of claim 48 or 59 comprising the further step of repeating as needed the prior steps until the desired number of sensor devices has been installed.

59. A method for installing a sensor device in a cable with a protective jacket segment surrounding at least one strength member segment and at least one transmission medium segment, comprising the steps of;

removing a portion of said protective jacket segment to expose a length of said strength member segment, a length of said at least one transmission medium segment, leaving a first protective jacket segment and a second protective jacket segment on either side of the removed portion;

removing an interior segment of said exposed strength member length resulting in two exposed strength member ends on either side of where said interior segment was;

attaching said exposed strength member ends to an interlink/sensor assembly;

connecting said sensor device to at least one of said exposed transmission medium segments.

60. The method for installing a sensor device in a cable of claim 59 further comprising the step of surrounding and containing said interlink/sensor assembly within an overmold.

61. The method for installing a sensor device in a cable of claim 60 further comprising the step of sealing said overmold to said first and second protective jacket segments.

62. The method for installing a sensor device in a cable of claim 59, 60 or 61 wherein said strength member segment has an outer coating jacket, further comprising the step of removing a portion of said outer coating jacket.