JP2004265860A - Cable and RFID prolonged body - Google Patents

Abstract

An object of the present invention is to write all cable identification information in an RFID element 23 easily and in a short time even if the amount of cable identification information becomes enormous.
A first bonding tape (17), a second bonding tape (19), and an own cable and another cable arranged between the first bonding tape (17) and the second bonding tape (19) at appropriate intervals along the tape longitudinal direction. A number of RFID elements 23 capable of reading and writing cable identification information for identification by transmission of electromagnetic energy, and cable identification information arranged between the first bonding tape 17 and the second bonding tape 19 and assigned to all RFID elements 23 The RFID continuous body 15 including the transmission wire 25 for writing information in a lump is provided on the cable core 3 by vertical attachment or horizontal winding.
[Selection diagram] Fig. 1

Description

  The present invention relates to a cable such as an optical fiber cable and a metal cable, and a continuous RFID body used to identify the cable.

  For example, in cable replacement work, removal work, and the like (work related to cables), a sheath (outer sheath) of the cable is usually used so that a target cable can be identified (identified) from a large number of cables laid in a trough or the like. ) Is directly or indirectly attached with cable identification information for identifying the own cable and the other cable.

That is, the cable identification information is printed on the surface of the sheath using ink, transfer paper, or laser, and the tag attached to the sheath surface is engraved with the cable identification information. Furthermore, as shown in Patent Document 1, two-dimensional QR-coded cable identification information is printed on a QR code printing paper, and then the QR code printing paper is attached to the surface of the sheath of the cable using a protective film. Or
JP 2001-21730A

  By the way, in recent years, the number of optical fiber cables in which optical fiber cores and optical fiber tape cores are assembled ranges from a small number of cores to a large number of cores, and the cable identification information for identifying one cable is enormous. Become. Therefore, it is not easy to attach all the cable identification information of the cable only by printing on the surface of the sheath, engraving on the tag, or sticking QR code printing paper on the surface of the sheath. It becomes difficult to identify a target cable from among the cables, and the work efficiency of the work related to the cable deteriorates.

  In addition, since the printed cable identification information and the engraved cable identification information are exposed on the outside (surface) of the cable, the cable identification information becomes illegible due to rubbing, etc., after a long time has passed since the cable was laid. Then, a situation occurs in which the cable cannot be identified. Similarly, even when the QR code printing paper is adhered to the surface of the sheath using a protective film, the protective film peels off from the sheath, and the same problem as described above occurs.

  The present invention has been made to solve the above-mentioned problems.

The cable of the present invention includes a cable core,
A number of RFID elements that are arranged at appropriate intervals along the cable longitudinal direction in the cable core, and that can read and write cable identification information for identifying the own cable and the other cable by transmitting electromagnetic energy,
A transmission wire provided on the cable core along a direction in which the plurality of RFID elements are arranged, and configured by two conductors;
A sheath that is provided so as to cover the cable core, and covers the outer periphery of the cable core together with the multiple RFID elements and the transmission wire;
Equipped with
The transmission wire is disposed in a range in which the two conductors are twisted, and the two conductors form loops, and the corresponding RFID elements can sense electromagnetic energy from each other. It is characterized by having a plurality of loop portions alternately.

The cable of the present invention includes a cable core,
A first joining tape provided in the cable core by longitudinal attachment or horizontal winding and having a first joining surface, and a second joining tape having a second joining surface joined to the first joining surface by adhesion or fusion. Reading and writing, by transmitting electromagnetic energy, cable identification information that is disposed at appropriate intervals along the longitudinal direction of the tape between the first bonding tape and the second bonding tape and that identifies the own cable and the other cable. An RFID string comprising a number of possible RFID elements and a transmission wire arranged between the first bonding tape and the second bonding tape and composed of two conductors;
A sheath that is provided so as to cover the cable core, and covers an outer peripheral portion of the cable core together with the RFID continuous body;
Equipped with
The transmission wire is disposed in a range in which the two conductors are twisted, and the two conductors form loops, and the corresponding RFID elements can sense electromagnetic energy from each other. It is characterized by having a large number of loop portions alternately.

A cable according to the present invention includes a cable core having a slot having a tensile member at a central portion and one or a plurality of storage grooves at an outer peripheral portion,
One or more optical fiber cores provided in each storage groove of the cable core,
A first joining tape provided in the cable core by longitudinal attachment or horizontal winding and having a first joining surface, and a second joining tape having a second joining surface joined to the first joining surface by adhesion or fusion. Reading and writing, by transmitting electromagnetic energy, cable identification information that is disposed at appropriate intervals along the longitudinal direction of the tape between the first bonding tape and the second bonding tape and that identifies the own cable and the other cable. An RFID string comprising a number of possible RFID elements and a transmission wire arranged between the first bonding tape and the second bonding tape and composed of two conductors;
A sheath that is provided so as to cover the cable core, and covers an outer peripheral portion of the cable core together with the RFID continuous body;
Equipped with
The transmission wire is disposed in a range in which the two conductors are twisted, and the two conductors form loops and the corresponding RFID elements can sense electromagnetic energy from each other. It is characterized by having a large number of loop portions alternately.

A cable according to the present invention includes a tension member having a tensile member at a central portion, a cable core including a plurality of optical fiber cords at an outer peripheral portion of the tension member,
A first joining tape provided in the cable core by longitudinal attachment or horizontal winding and having a first joining surface, and a second joining tape having a second joining surface joined to the first joining surface by adhesion or fusion. Reading and writing, by transmitting electromagnetic energy, cable identification information that is disposed at appropriate intervals along the longitudinal direction of the tape between the first bonding tape and the second bonding tape and that identifies the own cable and the other cable. An RFID string comprising a number of possible RFID elements and a transmission wire arranged between the first bonding tape and the second bonding tape and composed of two conductors;
A sheath that is provided so as to cover the cable core, and covers an outer peripheral portion of the cable core together with the RFID continuous body;
Equipped with
The transmission wire is disposed in a range in which the two conductors are twisted, and the two conductors form loops, and the corresponding RFID elements can sense electromagnetic energy from each other. It is characterized by having a large number of loop portions alternately.

The RFID run of the present invention is an RFID run that is used to identify a cable,
A first bonding tape having a first bonding surface;
A second bonding tape having a second bonding surface bonded to the first bonding surface by adhesion or fusion;
Between the first bonding tape and the second bonding tape, it is arranged at an appropriate interval along the longitudinal direction of the tape, and cable identification information for identifying its own cable and another cable can be read and written by transmitting electromagnetic energy. A number of RFID elements,
A transmission wire disposed between the first bonding tape and the second bonding tape and composed of two conductive wires,
The transmission wire includes a plurality of twisted portions in which the two conductors are respectively twisted, and a plurality of twisted portions in which the two conductors form a loop and are arranged in a range where the corresponding RFID elements can mutually sense electromagnetic energy. And alternately having the loop portions.

  As understood from the means for solving the problems as described above, according to the present invention, by appropriately operating a read / write device, writing cable identification information to the RFID element by transmitting electromagnetic energy, The cable identification information written in the appropriate RFID element can be read. Thus, a target cable can be identified (specified) from a large number of cables.

  Also, when the cable identification information is written to any one of the RFID elements by transmitting the electromagnetic energy to which the write signal is added, the electromagnetic energy is guided to the transmission wire by a loop corresponding to any one of the RFID elements, and Transmit wire. As a result, electromagnetic energy is induced in all the loop portions, and the cable identification information can be written to all the RFID elements at once.

  Further, the plurality of RFID elements are arranged at appropriate intervals along the longitudinal direction of the tape on the second joining surface of the second joining tape (or the first joining surface of the first joining tape). In addition, the transmission wire is arranged on the second bonding surface of the second bonding tape (or the first bonding surface of the first bonding tape) such that each loop portion contacts a corresponding RFID element. Then, the first bonding surface and the second bonding surface are bonded to each other by bonding or fusion, so that the plurality of RFID elements are held with the first bonding tape and the second bonding tape sandwiched therebetween. This makes it possible to manufacture the RFID continuous body obtained by integrating the plurality of RFID elements and the bonding tape (the first bonding tape and the second bonding tape).

  After manufacturing the above-mentioned RFID continuous body, the RFID continuous body is provided vertically or horizontally on the cable core, and the sheath is provided so as to cover the cable core. Thus, a cable in which the RFID continuous body is housed can be manufactured. Here, since the RFID continuous body includes the multiple RFID elements arranged at appropriate intervals along the longitudinal direction of the tape, the multiple RFID elements are arranged inside the cable along the longitudinal direction of the cable. They can be stored at appropriate intervals.

  Further, since the RFID continuous body includes the RFID element capable of reading and writing the cable identification information by transmitting electromagnetic energy, even if the cable identification information becomes enormous, all the cables are attached to the RFID element. The identification information can be written easily and in a short time, and all the cable identification information can be easily and quickly read from the RFID element. Therefore, a target cable can be easily and quickly identified from a large number of cables, and work efficiency of cable-related work (cable replacement work, removal work, etc.) is improved.

  For the same reason as described above, even if a long time has passed since the cable was laid, the cable identification information written in the RFID element does not disappear, and the cable can be identified for a long time. .

  Further, when the cable identification information is written to any of the RFID elements by transmitting the electromagnetic energy to which the write signal is added, the electromagnetic energy is induced in all the loop portions, and the cable identification information is collectively transmitted to all the RFID elements. Can be written, the operation of writing the cable identification information to all the RFID elements can be simplified, and the effective use of the RFID elements can be achieved.

  Since the transmission distance of the transmission wire is determined by the amount of attenuation of the electromagnetic energy, the transmission distance has a limit. Therefore, the cable identification information is collectively applied to all the RFID elements within the limit of the transmission distance. Can write.

  Further, since the plurality of RFID elements can be housed at appropriate intervals in the cable in the longitudinal direction of the cable, the cable can be identified in a large number of work areas along the cable.

  Further, since the RFID continuous body is formed by integrating the plurality of RFID elements and the bonding tape (the first bonding tape and the second bonding tape), the RFID continuous body is attached to the cable core. By providing the RFID elements in the vertical or horizontal direction, the plurality of RFID elements can be easily and easily stored inside the cable (inside the sheath of the cable), and the displacement of the RFID elements inside the cable is eliminated. Thus, the cable can be identified stably.

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of an optical fiber cable according to an embodiment of the first invention, and FIG. 2 is a perspective view showing a bonding tape which is a component of an RFID continuous body according to an embodiment of the invention. FIG. 3 is a plan view of the RFID continuous body according to the embodiment of the present invention, FIG. 4 is a view taken along the line II in FIG. 3, and FIG. FIG. 4 is a schematic explanatory diagram of an electromagnetic field distribution showing a relationship between lines of electric force and lines of magnetic force in a loop portion of a transmission wire.

  As shown in FIG. 1, an optical fiber cable 1 according to an embodiment of the first invention has a cable core 3 as a main component, and a specific configuration of the cable core 3 is as follows. That is, the cable core 3 is provided with a slot 5, and has a tensile member 7 made of a copper stranded wire at the center of the slot 5. A plurality of (five in the first embodiment) storage grooves 9 are spirally formed on the outer peripheral portion of the slot 5, and each of the storage grooves 9 has an optical fiber core. For example, a plurality of (five in the first embodiment of the present invention) optical fiber ribbons 11 are respectively housed. Further, a presser winding 13 is wound so as to cover the outer peripheral portion of the slot 5 so that the optical fiber ribbon 11 does not come off from the storage groove 9. The optical fibers stored in each of the storage grooves 9 may be one or more optical fiber tapes or other types of optical fibers.

  An RFID (Radio Frequency Identification) continuous body 15 is provided on the cable core 3 in a vertically attached or horizontally wound manner. For details of the configuration of the RFID continuous body 15 which is a main part of the embodiment of the present invention. The explanation is as follows.

  As shown in FIGS. 1 to 4, the RFID continuous body 15 is used for identifying the optical fiber cable 1 and is based on a first bonding tape 17 and a second bonding tape 19. The first bonding tape 17 and the second bonding tape 19 are each made of a PET material (polyethylene terephthalate). The first bonding tape 17 has a first bonding surface 17f to which the thermosetting adhesive 21 can be applied, and the second bonding tape 19 has a first bonding surface to which the thermosetting adhesive 21 can be applied. 17f has a second joint surface 19f to be joined by adhesion. Here, in the embodiment of the present invention, the tape width of the first joining tape 17 and the tape width of the second joining tape 19 are each 6 mm, and the tape thickness of the first joining tape 17 and the second joining tape 17 are different. Each of the tapes 19 has a thickness of 0.1 mm (0.11 mm including 21 layers of the thermosetting adhesive).

  Although the first joint surface 17f of the first joint tape 17 and the second joint surface 19f of the second joint tape 19 are joined by bonding, they may be joined by heat fusion. Absent.

  A large number of RFID (Radio Frequency Identification) elements 23 are arranged at regular intervals along the longitudinal direction of the tape (the left-right direction in FIGS. 3 and 4) between the first joining tape 17 and the second joining tape 19. Each RFID element 23 has an IC chip (not shown) that can read and write cable identification information for identifying its own cable and another cable by transmitting electromagnetic energy. Here, in the embodiment of the present invention, the outer diameter of the RFID element 23 is 2.1 mm, the length is 12 mm, and the number of the RFID elements 23 when housed in the optical fiber cable 1 is large. The interval in the longitudinal direction of the cable (in FIG. 1, the front and back sides toward the paper) is set to be substantially the same as the maximum communication distance between the read / write device (not shown) and the RFID element 23 (about 1 m in the case of electromagnetic induction). I have. The cable identification information includes the manufacturer, the date of manufacture, the cable product name, the length, the content of the optical fiber ribbon 11, and the like. Further, as a method of transmitting electromagnetic energy, an electromagnetic induction method is used in the embodiment of the present invention, but a microwave method or an electromagnetic coupling method other than the electromagnetic induction method may be used.

  Further, a transmission wire 25 extending in the tape longitudinal direction is disposed between the first bonding tape 17 and the second bonding tape 19, and the transmission wire 25 is composed of two conductive wires (insulated conductors). I have. The transmission wire 25 has a plurality of twisted portions 25a in which the two conductors are respectively twisted, and a range in which the two conductors form loops and the corresponding RFID elements 23 can sense electromagnetic energy from each other. And a large number of loop portions 25b arranged in the same direction.

  Although the RFID continuous body 15 is configured to be located inside the presser winding 13 (see FIG. 1), it may be configured to be located outside the presser winding 13.

  In FIG. 3, the RFID element 23 and the transmission wire 25 are shown by solid lines in order to clearly show the arrangement relationship between the RFID element 23 and the transmission wire 25.

  Here, the relationship between the RFID element 23 and the transmission wire 25 will be described.

  As described above, in the transmission wire 25, a number of twisted portions 25a in which two conductive wires are twisted and a loop portion 25b in which the two conductive wires are parallel to form a loop are repeated at a constant period. . The electromagnetic field distribution indicating the relationship between the electric lines of force EL and the magnetic lines of force ML of the loop portion 25b is as shown in FIG. 5, and the portion between the two parallel conducting wires of the loop portion 25b is the most. This is a portion where the magnetic field strength is strong. The lines of electric force EL and the lines of magnetic force ML are always orthogonal to each other.

  Therefore, the allowable range of the position of the RFID element 23 differs depending on the power emitted from the parallel portion of the transmission wire 25 and the sensitivity of the RFID element 23. Is optimal. This range A can be limited by the size of the transmission wire 25 and the shape of the two conductors of the loop portion 25b.

  For example, a transmission wire 25 in which a 0.35 mm thick polyethylene insulating core 25d is applied to a 0.6 mm diameter conducting wire 25c, and the distance L between the conducting centers of the parallel portions of the loop portion 25b is 5 mm, and Is 2 cm, the shortest side of the rectangle in the range A in FIG. 5 is 2 mm and the long side is 5 mm.

  When the insulating cores 25d of the two transmission wires 25 are in close contact with each other in the loop portion 25b, that is, when the distance L between the conductor centers is the same as the diameter of the insulating core 25d (the diameter of the transmission wire 25), The good range is from the position where the RFID element 23 is in close contact with the parallel part of the transmission wire 25 to the position where the center of the RFID element 23 is 3 mm away.

  Further, the position of the RFID element 23 in the longitudinal direction of the transmission wire 25 must be arranged in a range where the entire RFID element 23 overlaps within the two transmission wires 25 of the loop portion 25b. That is, it is necessary that the entire length of the RFID element 23 in the longitudinal direction be located within the longitudinal range of the parallel portion of the two transmission wires 25 of the loop portion 25b. Note that the optimum position of the RFID element 23 in the longitudinal direction is a state where the center of the RFID element 23 in the longitudinal direction coincides with the center of the loop portion 25b in the longitudinal direction.

  Next, the limit of the transmission distance of the transmission wire 25 will be described.

  The transmission distance of the transmission wire 25 is determined by the amount of attenuation of the electromagnetic energy. In the case of the insulating core 25d, the attenuation at 125 kHz is 0.3 dB / km. This is a power down of about 7%, and a distance of 1 km is possible depending on the sensitivity of the RFID element 23. In general, the cable piece length is often 500 m or less, so that transmission for one piece of the cable is sufficiently possible.

  As shown in FIG. 1, the cable core 3 is provided so as to cover the outer peripheral portion of the cable core 3 together with the RFID continuous body 5, and the sheath 27 is made of PE (polyethylene) or PVC (polyethylene). (Vinyl chloride) and the like. Here, in the embodiment of the first invention, the outer diameter of the sheath 27, in other words, the outer diameter of the optical fiber cable 1 is 18 mm.

  Further, on the surface of the sheath 27, a number of indications (not shown) for indicating the position of the RFID element 23 are provided at regular intervals along the longitudinal direction of the cable. The distance between the plurality of RFID elements 23 in the optical fiber cable 1 when it is stored in the optical fiber cable 1 is set to be the same as the distance in the cable longitudinal direction.

  Here, the definition of the above-described cable core 3 will be described in detail.

  Regardless of whether the cable is used for communication or for power, the cable can be roughly classified into a portion where the transmission path including the plurality of optical fiber ribbons 11 is converged, and an external protection portion. As the external protection part, a resin sheath 27 or a metal tube is used. In addition, in the portion where the transmission path is converged, in addition to the transmission path itself, for example, a presser-wound tape, a thread, and a tensile strength member 7 as a buffering material or a presser winding 13 wrapped or attached vertically so as not to break the convergence. included. It may also include water-absorbing tapes or yarns for waterproofing.

  Therefore, the cable core 3 means all parts other than an external protection part such as a resin sheath 27 or a metal tube for protection provided on the outermost layer of the cable (in other words, the transmission path is converged). Part).

  Next, the operation of the embodiment of the first invention will be described.

  After applying the thermosetting adhesive 21 to the first bonding surface 17f of the first bonding tape 17, a large number of RFID elements 23 are applied to the second bonding surface 19f of the second bonding tape 19 along the tape longitudinal direction. Place at intervals. Further, the transmission wire 25 is arranged on the second joining surface 19f of the second joining tape 19 so that each loop portion 25b contacts the corresponding RFID element 23. Next, after applying the thermosetting adhesive 21 to the first joining surface 17f of the first joining tape 17, the first joining surface 17f of the first joining tape 17 and the second joining surface 19f of the second joining tape 19 are applied. Overlaid. Then, the first bonding surface 17f of the first bonding tape 17 and the second bonding surface 19f of the second bonding tape 19 are bonded by using a heating roller (not shown), so that the first bonding tape 17 A large number of RFID elements 23 are held in a state sandwiched between the first bonding surface 17f and the second bonding surface 19f of the second bonding tape 19. In this way, it is possible to manufacture the RFID continuous body 15 in which a large number of the RFID elements 23 and the joining tape (the first joining tape 17 and the second joining tape 19) are integrated.

  After manufacturing the RFID string 15, the RFID string 15 is attached to the cable core 3 by vertical attachment or horizontal winding, and the sheath 27 is wound so as to cover the cable core 3. Thereby, the optical fiber cable 1 in which the RFID continuous body 15 is housed can be manufactured. Here, since the RFID continuous body 15 includes a large number of RFID elements 23 arranged at equal intervals along the tape longitudinal direction, a large number of RFID elements 23 are provided inside the optical fiber cable 1 in the cable longitudinal direction. Can be stored at equal intervals.

  In addition, by appropriately operating the read / write device, cable identification information is written to the IC chips of a large number of RFID elements 23 by transmitting electromagnetic energy, or the cable identification information written on the IC chips of the appropriate RFID elements 23 is written. Information can be read. Thus, the target optical fiber cable 1 can be identified (specified) from a large number of cables laid in a trough or the like.

  In particular, when the cable identification information is written to any one of the RFID elements 23 by transmitting the electromagnetic energy to which the write signal is added, the electromagnetic energy is guided to the transmission wire 25 by the loop portion 25b corresponding to any one of the RFID elements 23, The transmission wire 25 is transmitted. As a result, electromagnetic energy is induced in all the loop portions 25b, and the cable identification information can be written to all the RFID elements 23 collectively.

  As described above, according to the embodiment of the present invention, since the RFID string 15 includes the RFID element 23 that can read and write the cable identification information by transmitting the electromagnetic energy, the cable identification of the optical fiber cable 1 can be performed. Even if the amount of information becomes enormous, all the cable identification information can be written to the RFID element 23 easily and in a short time, and all the cable identification information can be read from the RFID element 23 easily and in a short time. . Therefore, the target optical fiber cable 1 can be easily identified from a large number of cables in a short time, and the work efficiency of the cable-related work (such as cable replacement work and removal work) is improved.

  For the same reason as described above, even if a long time has passed since the optical fiber cable 1 was laid, the cable identification information written in the RFID element 23 does not disappear, and the optical fiber cable 1 has been connected for a long time. Can be identified.

  Further, when the cable identification information is written to any of the RFID elements 23 by transmitting the electromagnetic energy to which the write signal is added, the electromagnetic energy is induced in all the loop portions 25b, and the cable identification information is collectively transmitted to all the RFID elements 23. Since the information can be written, the operation of writing the cable identification information to all the RFID elements 23 is simplified, and the RFID elements 23 can be effectively used.

  However, as described above, since the transmission distance of the transmission wire 25 is determined by the amount of attenuation of the electromagnetic energy, the transmission distance has a limit. Therefore, the fact that the cable identification information can be collectively written to all the RFID elements means that it can be performed strictly within the limit of the transmission distance.

  Further, since the RFID continuous body 15 is formed by integrating a large number of RFID elements 23 and the bonding tapes 17 and 19, the RFID continuous body 15 is provided on the cable core 3 by vertical attachment or horizontal winding, so A large number of RFID elements 23 can be easily and easily stored inside the fiber cable 1 (inside the sheath 27), and the displacement of the RFID elements 23 inside the optical fiber cable 1 is eliminated. Can be identified stably.

  Furthermore, while a large number of RFID elements 23 can be housed inside the optical fiber cable 1 at equal intervals along the cable longitudinal direction, the space between the many RFID elements 23 when housed inside the optical fiber cable 1 is Since the setting is made so as to be substantially the same as the maximum communication distance between the read / write device and the RFID element 23, the optical fiber cable 1 can be identified in an arbitrary work area along the optical fiber cable 1.

  FIG. 6 is a sectional view of an optical fiber cable according to the second embodiment.

  As shown in FIG. 6, an optical fiber cable 29 according to the second embodiment of the present invention has a cable core 31 as a main component, and a specific configuration of the cable core 31 is as follows. That is, the cable core 31 includes a tension member 33, and a tension member 35 is provided at the center of the tension member 33. Further, a plurality of (12 in the embodiment of the present invention) optical fiber cords 37 are provided on the outer peripheral portion of the tension member 33 in a twisted manner, and the plurality of optical fiber cords 37 are tensioned. A plurality of optical fiber cords 37 are wound so as to cover the outer periphery of the plurality of optical fiber cords 37 so as not to be separated from the member 33.

  The cable core 31 is provided with an RFID continuous body 41 that is attached vertically or horizontally, and the RFID continuous body 41 is used for identifying the optical fiber cable 31 and is described in detail. Although omitted, it has substantially the same configuration as the RFID continuous body 15 according to the embodiment of the first invention (see FIGS. 2 and 3). In addition, although the RFID continuous body 41 is located outside the holding roll 39, it may be configured to be located inside the holding roll 39.

  The cable core 31 is provided so that the outer periphery of the cable core 31 is covered with a sheath 43 together with the RFID continuous body 41. The sheath 43 is made of PE (polyethylene) or PVC (polyvinyl chloride). It becomes. Here, in the embodiment of the second invention, the outer diameter of the sheath 43, in other words, the outer diameter of the optical fiber cable 31 is 16 mm. Further, on the surface of the sheath 43, a number of indications (not shown) for indicating the position of the RFID element 23 in the RFID elongated body 41 are provided along the cable longitudinal direction (the direction of the front and back of the paper in FIG. 6). The intervals between the reference indications are set to be the same as the intervals in the cable longitudinal direction of a large number of RFID elements 23 when housed inside the optical fiber cable 31.

  The above-described second embodiment also has the functions and effects according to the first embodiment.

  Note that the present invention is not limited to the description of the embodiment of the present invention, and can be implemented in various modes as follows, for example.

  That is, a large number of RFID elements 23 may be housed inside the optical fiber cable 1 (31) without being integrated. In this case, the respective loop portions 25b need not be brought into contact with the corresponding RFID elements 23, but may be merely arranged in a range where electromagnetic energy can be sensed.

  Further, the RFID continuous body 15 (41) may be used as a metal cable other than the optical fiber cables 1 and 31.

1 is a sectional view of an optical fiber cable according to an embodiment of the first invention. FIG. 2 is a perspective view showing a joining tape which is a component of the RFID continuous body according to the embodiment of the present invention. FIG. 3 is a plan view of the RFID run according to the embodiment of the present invention. FIG. 4 is a view taken along line II in FIG. 3. FIG. 4 is a schematic explanatory diagram of an electromagnetic field distribution showing a relationship between lines of electric force and lines of magnetic force in a loop portion of a transmission wire. It is sectional drawing of the optical fiber cable which concerns on embodiment of 2nd invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Optical fiber cable 3 Cable core 5 Slot 7 Tensile member 9 Storage groove 15 RFID continuous body 17 First joining tape 17f First joining surface 19 Second joining tape 19f Second joining surface 23 RFID element 25 Transmission wire 25a Twisted portion 25b Loop part 25c Conducting wire 25d Insulating core 27 Sheath 29 Optical fiber cable 31 Cable core 41 RFID continuous body 43 Sheath EL Electric flux lines ML Magnetic flux lines

Claims (5)

A cable core,
A number of RFID elements that are arranged at appropriate intervals along the cable longitudinal direction in the cable core, and that can read and write cable identification information for identifying the own cable and the other cable by transmitting electromagnetic energy,
A transmission wire provided on the cable core along a direction in which the plurality of RFID elements are arranged, and configured by two conductors;
A sheath that is provided so as to cover the cable core, and covers the outer periphery of the cable core together with the multiple RFID elements and the transmission wire;
Equipped with
The transmission wire is disposed in a range in which the two conductors are twisted, and the two conductors form loops, and the corresponding RFID elements can sense electromagnetic energy from each other. A cable having a plurality of loop portions alternately. A cable core,
A first joining tape provided in the cable core by longitudinal attachment or horizontal winding and having a first joining surface, and a second joining tape having a second joining surface joined to the first joining surface by adhesion or fusion. Reading and writing, by transmitting electromagnetic energy, cable identification information that is disposed at appropriate intervals along the longitudinal direction of the tape between the first bonding tape and the second bonding tape and that identifies the own cable and the other cable. An RFID string comprising a number of possible RFID elements and a transmission wire arranged between the first bonding tape and the second bonding tape and composed of two conductors;
A sheath that is provided so as to cover the cable core, and covers an outer peripheral portion of the cable core together with the RFID continuous body;
Equipped with
The transmission wire is disposed in a range in which the two conductors are twisted, and the two conductors form loops, and the corresponding RFID elements can sense electromagnetic energy from each other. A cable having a large number of loop portions alternately. A cable core having a slot having a tensile member at the center and having one or a plurality of storage grooves at the outer periphery,
One or more optical fiber cores provided in each storage groove of the cable core,
A first joining tape provided in the cable core by longitudinal attachment or horizontal winding and having a first joining surface, and a second joining tape having a second joining surface joined to the first joining surface by adhesion or fusion. Reading and writing, by transmitting electromagnetic energy, cable identification information that is disposed at appropriate intervals along the longitudinal direction of the tape between the first bonding tape and the second bonding tape and that identifies the own cable and the other cable. An RFID string comprising a number of possible RFID elements and a transmission wire arranged between the first bonding tape and the second bonding tape and composed of two conductors;
A sheath that is provided so as to cover the cable core, and covers an outer peripheral portion of the cable core together with the RFID continuous body;
Equipped with
The transmission wire is disposed in a range in which the two conductors are twisted, and the two conductors form loops, and the corresponding RFID elements can sense electromagnetic energy from each other. A cable having a large number of loop portions alternately. A tension member having a tensile member at the center, and a cable core having a plurality of optical fiber cords on the outer periphery of the tension member;
A first joining tape provided in the cable core by longitudinal attachment or horizontal winding and having a first joining surface, and a second joining tape having a second joining surface joined to the first joining surface by adhesion or fusion. Reading and writing, by transmitting electromagnetic energy, cable identification information that is disposed at appropriate intervals along the longitudinal direction of the tape between the first bonding tape and the second bonding tape and that identifies the own cable and the other cable. An RFID string comprising a number of possible RFID elements and a transmission wire arranged between the first bonding tape and the second bonding tape and composed of two conductors;
A sheath that is provided so as to cover the cable core, and covers an outer peripheral portion of the cable core together with the RFID continuous body;
Equipped with
The transmission wire is disposed in a range in which the two conductors are twisted, and the two conductors form loops and the corresponding RFID elements can sense electromagnetic energy from each other. A cable having a large number of loop portions alternately. An RFID string used to identify a cable,
A first bonding tape having a first bonding surface;
A second bonding tape having a second bonding surface bonded to the first bonding surface by adhesion or fusion;
Between the first bonding tape and the second bonding tape, it is arranged at an appropriate interval along the longitudinal direction of the tape, and cable identification information for identifying the own cable and the other cable can be read and written by transmitting electromagnetic energy. A number of RFID elements,
A transmission wire disposed between the first bonding tape and the second bonding tape and composed of two conductive wires,
The transmission wire includes a plurality of twisted portions in which the two conductors are respectively twisted, and a plurality of twisted portions in which the two conductors form a loop and are arranged in a range where the corresponding RFID elements can mutually sense electromagnetic energy. And a loop portion of the same.

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