Information management system and information management method

Abstract

To enable an appropriate laying condition to be easily acquired by a worker performing laying of cables.SOLUTION: An information management system comprises: an acquisition unit for acquiring cable information relating to laying of a cable and duct information relating to laying of a duct in which the cable is laid; and a calculation unit for calculating a laying condition which is recommended when laying the cable in the duct on the basis of the duct information and the cable information. The cable information is stored in a first code assigned to the cable, and the duct information is stored in a second code assigned to the duct.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to an information management system and an information management method.

[0002] Conventionally, at a cable laying site, workers would bring cable specifications and perform laying work while checking various parameters related to laying, such as the allowable tension of the cable, described in the specifications. In order to avoid bringing paper specifications to the laying site, for example, Patent Document 1 discloses a method of providing a recording means for recording, in the installed optical cable or in its vicinity, information related to laying of the optical cable in coded form, and recording and reading out the information related to laying of the optical cable at the optical cable laying site. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-21730 A Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, workers determine cable laying conditions such as tension and temperature based on various cable laying parameters and their own experience. For this reason, it may be difficult for inexperienced workers to determine appropriate cable laying conditions. Even for experienced workers, it may take a lot of time and effort to determine cable laying conditions while checking multiple cable laying parameters.

[0005] An object of the present disclosure is to provide an information management system and an information management method that enable a worker who lays cables to easily obtain appropriate laying conditions. [Means for solving the problem]

[0006] The information management system of the present disclosure includes: an acquisition unit that acquires cable information regarding the installation of a cable and duct information regarding the installation of a duct in which the cable is installed; a calculation unit that calculates a recommended installation condition when installing the cable inside the duct based on the duct information and the cable information, The cable information is stored in a first code attached to the cable, The duct information is stored in a second code attached to the duct.

[0007] The information management method of the present disclosure includes: obtaining cable information relating to a cable installation, the cable information being stored in a first code attached to the cable; acquiring duct information related to the installation of a duct in which the cable is installed, the duct information being stored in a second code attached to the duct; and calculating recommended installation conditions for installing the cable inside the duct based on the duct information and the cable information. Effect of the Invention

[0008] According to the present disclosure, workers who lay cables can easily obtain appropriate laying conditions. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing an example of a cable, a sub-duct, and a main duct in which an information management system according to an embodiment of the present disclosure is used. [Diagram 2] FIG. 2 is a block diagram showing a configuration of an information management system according to an embodiment of the present disclosure. [Diagram 3] FIG. 3 is a diagram showing an example of a method for reading the cable information stored in the first code shown in FIG. [Figure 4]FIG. 4 is a diagram showing an example of a schematic overall shape of a main duct in which the information management system shown in FIG. 2 is used. [Diagram 5] FIG. 5 is a sequence diagram for explaining the flow of operations of the information management system shown in FIG. [Figure 6] FIG. 6 is a diagram for explaining a state in which cable information is displayed on the terminal shown in FIG. [Figure 7] FIG. 7 is a diagram for explaining a state in which duct information is displayed on the terminal shown in FIG. [Figure 8] FIG. 8 is a diagram for explaining a state in which condition information is displayed on the terminal shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] <Description of the embodiments of the present disclosure> First, embodiments of the present disclosure will be listed and described. The information management system according to an embodiment of the present disclosure includes: (1) an acquisition unit that acquires cable information regarding the installation of a cable and duct information regarding the installation of a duct in which the cable is installed; a calculation unit that calculates a recommended installation condition when installing the cable inside the duct based on the duct information and the cable information, The cable information is stored in a first code attached to the cable, The duct information is stored in a second code attached to the duct.

[0011] In this way, by reading the first code attached to the cable and the second code attached to the duct in which the cable is to be laid, the recommended laying conditions are automatically calculated, so that workers can easily obtain appropriate laying conditions at the laying site.

[0012] (2) In the information management system described in (1) above, The duct has a plurality of sections, The duct information may include information regarding the installation of the ducts in each of the sections.

[0013] With this configuration, even if the duct has multiple sections with different shapes, such as length, bending angle, and inclination, it is possible to calculate appropriate installation conditions that take into account the shape of each section.

[0014] (3) In the information management system described in (1) or (2) above, A plurality of the first cords are attached to the cable along a longitudinal direction of the cable, The cable information stored in each of the first codes includes position information of the cable at a location where the first code is attached, The acquisition unit may acquire the position information of the first code after the cable is laid, The calculation unit may calculate a length of the laid cable based on the position information acquired by the acquisition unit.

[0015] In this way, by configuring the system to calculate the actual length of the laid cable, it is possible to improve the accuracy of calculating the estimated pumping distance from the next time onwards, for example by comparing the estimated pumping distance calculated before laying with the actual length of the cable after laying.

[0016] (4) Any of the information management systems described in (1) to (3) above further comprises: The system may further include a storage unit that stores the cable information and the duct information in association with each other.

[0017] In this way, by storing cable information and duct information about the duct in which the cable is installed in association with each other, it becomes possible to present useful information to workers when performing cable maintenance and management, for example.

[0018] An information management method according to an embodiment of the present disclosure includes: (5) obtaining cable information relating to a cable installation, the cable information being stored in a first code attached to the cable; acquiring duct information related to the installation of a duct in which the cable is installed, the duct information being stored in a second code attached to the duct; and calculating recommended installation conditions for installing the cable inside the duct based on the duct information and the cable information.

[0019] In this way, the method of calculating recommended installation conditions for laying a cable inside a duct based on cable information stored in a first code attached to the cable and duct information stored in a second code attached to the duct in which the cable is to be installed enables workers to easily obtain appropriate installation conditions at the installation site.

[0020] <Details of the embodiment of the present disclosure> Specific examples of the manufacturing apparatus of the present disclosure will be described below with reference to the drawings. Note that the present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0021] [Cable, subduct and main duct configuration] Fig. 1 is a perspective view showing an example of a cable 1, a subduct 2, and a main duct 3 in which an information management system 100 according to an embodiment of the present disclosure is used. As shown in Fig. 1, a subduct 2 is laid inside the main duct 3, and a cable 1 is laid inside the subduct 2. Although one cable 1 is laid inside one subduct 2 in Fig. 1, multiple cables 1 may be laid inside one subduct 2.

[0022] The cable 1 is, for example, a microduct cable that is laid inside the subduct 2 by air pressure feeding or towing, and has an outer diameter of about 20 mm. Note that if the radius of curvature of the surface of the outer sheath of the cable 1 is small, it becomes difficult to read the first code 15 described below, so the outer diameter of the cable 1 is preferably 6 mm or more.

[0023] The cable 1 is, for example, an optical fiber cable, and includes a cable core 11 and an outer jacket 12 formed around the cable core 11. The cable core 11 includes an optical fiber ribbon 16 including a plurality of optical fiber core wires 13, and an upper winding tape 14 covering the plurality of optical fiber ribbons 16. The optical fiber core wires 13 constituting the optical fiber ribbon 16 may be, for example, adjacent optical fiber core wires 13 intermittently connected along the longitudinal direction of the cable 1. Although the cable 1 shown in Fig. 1 is a slotless type, it may be a slot type.

[0024] The overwrapping tape 14 is wound vertically or horizontally around the optical fiber ribbons 16. The jacket 12 is made of a resin such as high density polyethylene (HDPE) and is formed by extrusion molding around the overwrapping tape 14. The jacket 12 is preferably made of a material with a silicone additive amount in the range of 0.1% to 0.5% by mass. In this case, when the cable 1 is laid inside the subduct 2, the jacket 12 can be made slippery when the jackets 12 are in contact with each other or with the subduct 2, making it easy to lay the cable 1.

[0025] A first code 15 is attached to the jacket 12. The first code 15 stores cable information related to the installation of the cable 1. A second code 31 is attached to the main duct 3. The second code 31 stores duct information related to the installation of the main duct 3.

[0026] 1, a QR code (registered trademark), which can record a large amount of information such as letters and numbers by combining white cells and black cells and can be read quickly, is attached as the first code 15 and the second code 31. The first code 15 and the second code 31 may be printed by an inkjet printer or the like, or may be engraved with a laser.

[0027] Also, instead of printing or engraving the first code 15 directly on the cable 1, a piece of paper on which the first code 15 is printed, an IC chip, or the like may be attached to the cable 1. Also, instead of printing or engraving the second code 31 directly on the main duct 3, a piece of paper on which the second code 31 is printed, an IC chip, or the like may be attached to the main duct 3.

[0028] The first cord 15 is preferably given a color different from that of the jacket 12. This makes it possible to easily confirm the location where the first cord 15 is attached. The second cord 31 is preferably given a color different from that of the main duct 3. This makes it possible to easily confirm the location where the second cord 31 is attached.

[0029] The cable information includes at least one of information such as the manufacturer, manufacturing year, control number, outer diameter, mass, friction coefficient, stiffness, number of optical fiber cores, allowable tension, allowable bending diameter, and operating temperature of the cable 1. The duct information includes at least one of information such as the manufacturer, manufacturing year, control number, inner diameter, length, bending angle, and inclination of the main duct 3.

[0030] The second code 31 is not limited to being attached to the main duct 3, and may be attached to the sub-duct 2. When the second code 31 is attached to the sub-duct 2, the second code 31 includes at least one of information of the sub-duct 2, such as the manufacturer, manufacturing year, control number, inner diameter, length, bending angle, and inclination.

[0031] [Information Management System Configuration] Fig. 2 is a block diagram showing a configuration of an information management system 100 according to an embodiment of the present disclosure. With reference to Fig. 2, the information management system 100 includes a terminal (acquisition unit) 10 and a management device 20. The terminal 10 and the management device 20 are communicatively connected via an external network 40 such as the Internet and a wireless base station 41. The terminal 10 is, for example, a smartphone used by a worker who installs the cable 1, and includes a photographing function and a display function.

[0032] (Getting cable and duct information) FIG. 3 is a diagram showing an example of a method for reading cable information stored in the first code 15 shown in FIG. 1. As shown in FIG. 3, the first codes 15 are attached to the jacket 12 of the cable 1 at a plurality of positions at predetermined intervals, for example, along the longitudinal direction of the cable 1. The predetermined intervals are, for example, within a range of 30 cm to 1 m. The cable information stored in each first code 15 includes the above-mentioned information such as the manufacturer, manufacturing year, control number, outer diameter, mass, friction coefficient, stiffness, number of optical fiber cores, allowable tension, allowable bending diameter, and operating temperature, as well as position information of the positions to which the first codes 15 are attached. For example, each first code 15 stores position information indicating the distance from a reference point in the cable 1 as cable information.

[0033] Similarly, in the main duct 3 shown in FIG. 1, second codes 31 are attached at a plurality of positions at a predetermined interval along the longitudinal direction of the main duct 3. The predetermined interval is, for example, within a range of 30 cm to 1 m. The plurality of second codes 31 attached to the same main duct 3 store the same duct information, but may store different duct information. For example, position information of the positions where the second codes 31 are attached may be stored in the second codes 31.

[0034] Fig. 4 is a diagram showing an example of a schematic shape of the entire main duct 3 in which the information management system 100 shown in Fig. 2 is used. For example, the main duct 3 has a plurality of sections. At least two of the plurality of sections have different values ​​of various parameters related to installation, such as length, bending angle, and inclination. In this case, the duct information stored in the second code 31 includes information related to installation in all the sections.

[0035] 3 photographs the first code 15 attached to the cable 1 and reads the cable information stored in the first code 15. The terminal 10 also photographs the second code 31 attached to the main duct 3 and obtains the duct information stored in the second code 31. The terminal 10 then transmits the read cable information and duct information to the management device 20 via the wireless base station 41 and the external network 40 shown in FIG. 2.

[0036] (Calculation and display of laying conditions) 2, management device 20 has a communication unit 21, a storage unit 22, and a calculation unit 23. Communication unit 21 receives cable information and duct information transmitted from terminal 10, and outputs the cable information and duct information to calculation unit 23. Calculation unit 23 calculates installation conditions recommended for installing cable 1 inside main duct 3, based on the cable information and duct information.

[0037] More specifically, one or more calculation formulas used to calculate the laying conditions are stored in the storage unit 22. For example, the magnitude of friction generated between the main duct 3 and the cable 1 changes depending on the bending angle of the main duct 3, and therefore the estimated pumping distance of the cable 1 changes. Such relational expressions between the values ​​of various parameters related to the laying of the cable 1 and the values ​​of various parameters related to the laying of the main duct 3 are stored in the storage unit 22 as calculation formulas used to calculate the laying conditions.

[0038] The calculation unit 23 uses the cable information, the duct information, and one or more calculation formulas stored in the memory unit 22 to calculate optimal laying conditions such as the estimated pumping distance, the maximum allowable tension, and the recommended laying temperature when laying the cable 1 in the main duct 3.

[0039] Assume that the main duct 3 has multiple sections as shown in Fig. 4, and the duct information includes all information for each section. In this case, the calculation unit 23 calculates optimal installation conditions using statistical values ​​of values ​​for each section, such as the average or maximum value of the length of each section, and the average or maximum value of the bending angle of each section. This makes it possible to calculate more appropriate installation conditions that take into account differences in the shapes of each section, even when the main duct 3 has multiple sections.

[0040] Then, the calculation unit 23 outputs condition information indicating the calculated installation conditions to the communication unit 21. Furthermore, the calculation unit 23 stores in the storage unit 22, for example, cable information used in the calculation, duct information, and the calculated installation conditions in association with each other.

[0041] When the communication unit 21 receives the condition information from the calculation unit 23, it transmits the condition information to the terminal 10 via the external network 40 and the wireless base station 41. When the terminal 10 receives the condition information transmitted from the management device 20, it displays the installation conditions indicated by the condition information on the screen of the terminal 10.

[0042] The cable information stored in the first code 15 is not limited to the values ​​of various parameters related to the installation of the cable 1, but may be identification information corresponding to these values. The identification information is information that can limit the values ​​of various parameters of the cable 1, such as the type and product number. Similarly, the duct information stored in the second code 31 is not limited to the values ​​of various parameters related to the installation of the main duct 3, but may be identification information corresponding to these values. The identification information is information that can limit the parameters of the main duct 3, such as the type and product number. The identification information may also include letters, codes, or symbols that correspond to the distance from a reference point.

[0043] For example, the storage unit 22 in the management device 20 stores a first correspondence table indicating the correspondence between the values ​​of various parameters related to the installation of the cable 1 and the identification information. The storage unit 22 also stores a second correspondence table indicating the correspondence between the values ​​of various parameters related to the installation of the main duct 3 and the identification information. When the calculation unit 23 in the management device 20 receives the identification information as cable information, it can refer to, for example, the first correspondence table to obtain the values ​​of various parameters corresponding to the identification information. When the calculation unit 23 receives the identification information as duct information, it can refer to, for example, the second correspondence table to obtain the values ​​of various parameters corresponding to the identification information.

[0044] (Update of formula used to calculate laying conditions) After the cable 1 is laid, the management device 20 may calculate the length of the cable 1 after it has been laid. For example, the worker causes the terminal 10 to read both the first cord 15 attached to the first end and the first cord 15 attached to the second end of the cable 1 after it has been laid. After reading the cable information, the terminal 10 causes, for example, an instruction button (not shown) for instructing calculation of the length of the cable 1 to be displayed on the screen. When the worker performs an operation to select the instruction button, the terminal 10 transmits these two pieces of cable information and instruction information instructing calculation of the length of the cable 1 to the management device 20.

[0045] When communication unit 21 in management device 20 receives the two pieces of cable information and the instruction information transmitted from terminal 10, it outputs the two pieces of cable information and the instruction information to calculation unit 23. Then, calculation unit 23 calculates the length of cable 1 after laying, based on the two pieces of cable information and the instruction information output from communication unit 21.

[0046] Specifically, the calculation unit 23 calculates the length of the cable 1 after installation by using the position information contained in the cable information stored in the first code 15 at the first end and the position information contained in the cable information stored in the first code 15 at the second end, i.e., by subtracting the position information.

[0047] Furthermore, the calculation unit 23 refers to the laying conditions of the cable 1 stored in the memory unit 22 and compares the estimated pumping distance of the cable 1 before laying with the length of the cable 1 after laying. Then, it is assumed that the difference between the estimated pumping distance of the cable 1 before laying and the length of the cable 1 after laying exceeds a predetermined value. In this case, the calculation unit 23 updates the calculation formula, for example, by changing the coefficients of the calculation formula stored in the memory unit 22 so that the estimated pumping distance approaches the length of the cable 1 after laying. This can improve the accuracy of calculation of the estimated pumping distance from the next time onwards.

[0048] When the first or second end of the installed cable 1 is the reference point, the worker may have the terminal 10 read only the cable information stored in the first code 15 attached to the end other than the reference point among the two ends of the installed cable 1, and may select an instruction button displayed on the screen of the terminal 10. In this case, the terminal 10 transmits the read cable information and instruction information to the management device 20.

[0049] When management device 20 receives one piece of cable information and instruction information from terminal 10, management device 20 calculates the length of cable 1 after laying based on the position information included in the cable information. That is, the distance from the reference point indicated by the cable information is calculated as the length of cable 1 after laying. Even in this case, calculation unit 23 updates the calculation formula stored in storage unit 22 in response to a comparison between the estimated pumping distance of cable 1 and the length of cable 1 after laying.

[0050] [Operation flow] Next, an operation flow of the information management system according to the embodiment of the present disclosure will be described. Fig. 5 is a sequence diagram for explaining the operation flow of the information management system shown in Fig. 2. Referring to Fig. 5, first, a worker who lays the cable 1 checks one of the multiple first codes 15 before the laying work, and takes an image of the first code 15 using the terminal 10. As a result, the terminal 10 reads the cable information stored in the first code 15 (step S11).

[0051] Next, the terminal 10 displays the read cable information, for example, on a screen provided on the terminal 10 (step S12). Fig. 6 is a diagram for explaining a state in which the cable information is displayed on the terminal 10 shown in Fig. 2. In Fig. 6, as an example, a list of the outer diameter, mass, friction coefficient, and stiffness of the cable 1 is displayed as cable information in an area R1 on the screen of the terminal 10.

[0052] 5 again, next, the worker checks one of the multiple second codes 31 (see FIG. 1) attached to the main duct 3, and takes an image of the second code 31 using the terminal 10. As a result, the terminal 10 reads the duct information stored in the second code 31 (step S13). Then, the terminal 10 displays the read duct information on, for example, a screen provided on the terminal 10 (step S14).

[0053] Fig. 7 is a diagram for explaining a state in which duct information is displayed on the terminal 10 shown in Fig. 2. In Fig. 7, as an example, a list of the lengths, bending angles, and inclinations of each section of the main duct 3 is displayed on the screen in region R2 on the screen of the terminal 10 as duct information.

[0054] Specifically, the terminal 10 displays, for example, an area R1 showing cable information and an area R2 showing duct information in a single window, and further displays on the screen a calculation button B for instructing the management device 20 to calculate the laying conditions. If the display area of ​​the terminal 10 screen is smaller than the size of the window, for example, a scroll bar S is displayed on the screen.

[0055] Next, it is assumed that the worker performs an operation to select the calculation button B, such as by pressing the calculation button B displayed on the screen of the terminal 10. In this case, the terminal 10 transmits the cable information and the duct information to the management device 20, as shown in FIG. 5 (step S15).

[0056] Next, when the management device 20 receives the cable information and duct information transmitted from the terminal 10, the management device 20 calculates optimal laying conditions for laying the cable 1 in the main duct 3 based on the cable information and duct information (step S16), and transmits condition information indicating the calculated laying conditions to the terminal 10 (step S17).

[0057] Then, when the terminal 10 receives the condition information transmitted from the management device 20, it displays the laying conditions indicated by the condition information on the screen (step S18). Figure 8 is a diagram for explaining the state in which the condition information is displayed on the terminal 10 shown in Figure 2. In Figure 8, as an example, a list of optimal laying conditions such as estimated pumping distance, maximum allowable tension, and recommended laying temperature is displayed in area R3 on the screen of the terminal 10.

[0058] In this way, the recommended laying conditions are automatically calculated based on the first cord 15 attached to the cable 1 and the second cord 31 attached to the main duct 3 and displayed on the worker's terminal 10, so that the worker can easily obtain the recommended laying conditions at the laying site. Furthermore, even a worker with little experience in laying work can more appropriately lay the cable 1 by obtaining the recommended laying conditions.

[0059] 5 again, it is assumed that after laying the cable 1, the worker uses the terminal 10 to capture images of the first cord 15 attached to the first end of the cable 1 and the first cord 15 attached to the second end of the cable 1. In this case, the terminal 10 reads the cable information stored in the first cord 15 for each of the first end and the second end of the cable 1 after laying (step S19).

[0060] Next, it is assumed that the worker performs an operation on terminal 10 to instruct it to transmit the cable information to management device 20. In this case, terminal 10 transmits two pieces of cable information corresponding to the first end and the second end, respectively, of cable 1 after installation to management device 20 (step S20).

[0061] Next, management device 20 calculates the length of cable 1 after laying based on two pieces of cable information corresponding to the first end and the second end of cable 1 after laying (step S21). Next, management device 20 determines whether or not the calculation formula used to calculate the laying conditions needs to be updated based on the estimated pumping distance of cable 1 calculated in step S16 and the length of cable 1 after laying (step S22).

[0062] For example, when the difference between the estimated pumping distance and the length of cable 1 after laying exceeds a predetermined value, management device 20 determines that the calculation formula needs to be updated ("YES" in step S22), and updates the calculation formula so that the estimated pumping distance approaches the length of cable 1 after laying (step S23). On the other hand, when the difference between the estimated pumping distance and the length of cable 1 after laying is equal to or less than a predetermined value, management device 20 determines that the calculation formula does not need to be updated ("NO" in step S22), and does not update the calculation formula.

[0063] In addition, in FIG. 5, the order of reading cable information (step S11) and displaying the cable information (step S12) and the order of reading duct information (step S13) and displaying the duct information (step S14) may be interchanged.

[0064] Furthermore, the terminal 10 is not limited to a smartphone, and may be AR (Argumented Reality) glasses, etc. Furthermore, at least one of the cable 1 and the main duct 3 may be laser-engraved with a two-dimensional code or a one-dimensional code other than the QR code.

[0065] 2 may have the function of the calculation unit 23 in the management device 20. For example, an application program installed in the terminal 10 may calculate installation conditions based on cable information and duct information.

[0066] [Variations] Referring again to Figure 2, after the cable 1 has been laid, the management device 20 may not only calculate the length of the cable 1 after laying, but may also store the cable information of the cable 1 in association with the duct information of the main duct 3 in which the cable 1 is laid.

[0067] For example, after laying the cable 1, the worker causes the terminal 10 to read any one of the multiple first codes 15 attached to the cable 1. Also, after laying the cable 1, the worker causes the terminal 10 to read any one of the multiple second codes 31 attached to the main duct 3 in which the cable 1 is laid. Then, the terminal 10 transmits the read cable information and duct information to the management device 20 in response to an operation by the worker.

[0068] When the communication unit 21 in the management device 20 receives the cable information and duct information transmitted from the terminal 10, it stores, in the storage unit 22, for example, the management number of the cable 1 contained in the cable information, the management number of the main duct 3 contained in the duct information, the reception date of the cable information and the duct information, and the identification information of the terminal 10 in association with each other. In this way, by storing information related to the installation collectively after the installation is completed, it becomes possible to present useful information to the worker when performing maintenance management, etc.

[0069] Although the present disclosure has been described above based on specific embodiments, the present invention is not limited to these examples, but is indicated by the claims, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0070] 1 Cable 2 Subduct 3 Main duct 10 Terminal 11 Cable core 12 Outer cover 13 Optical fiber core 14 Tape 15 First Code 16 Optical Fiber Ribbon 20 Management device 21 Communications Department 22 Memory section 23 Calculation section 31 Second Code 40 External Network 41 Radio base station 100 Information Management System B Calculation button R1,R2,R3 area S Scroll bar

Claims

1. an acquisition unit that acquires cable information regarding the installation of a cable and duct information regarding the installation of a duct in which the cable is installed; a calculation unit that calculates a recommended installation condition when installing the cable inside the duct based on the duct information and the cable information, The cable information is stored in a first code attached to the cable, An information management system in which the duct information is stored in a second code attached to the duct.

2. The duct has a plurality of sections, The information management system according to claim 1 , wherein the duct information includes information regarding the installation of the ducts in each of the sections.

3. A plurality of the first cords are attached to the cable along a longitudinal direction of the cable, The cable information stored in each of the first codes includes position information of the cable at a location where the first code is attached, The acquisition unit acquires the position information of the first code after the cable is laid, The information management system according to claim 1 , wherein the calculation unit calculates a length of the laid cable based on the position information acquired by the acquisition unit.

4. The information management system further comprises: The information management system according to claim 1 , further comprising a storage unit that stores the cable information and the duct information in association with each other.

5. obtaining cable information relating to a cable installation, the cable information being stored in a first code attached to the cable; acquiring duct information related to the installation of a duct in which the cable is installed, the duct information being stored in a second code attached to the duct; and calculating recommended installation conditions for installing the cable inside the duct based on the duct information and the cable information.

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