Monitoring system and method for marine hose

Abstract

The present invention provides a monitoring system and method capable of more easily ascertaining the internal and external states of a marine hose. In a state in which a drone (21) is moved to an airspace near above an IC tag (11) disposed on the surface of a ship hose (1), a reply radio wave (R2) is transmitted to a communication device (19) on the basis of a transmission radio wave (R1) by the IC tag (11) activated by the transmission radio wave (R1) transmitted by the communication device (19) mounted on the drone (21). The sensing result of the sensing index sensed by the sensor (10) is transmitted and input as acquisition data to the arithmetic device (20), and the arithmetic device (20) determines the internal state of the marine hose (1) on the basis of the magnitude of the difference between the acquisition data and the reference data. The calculation device (20) determines the external state of the marine hose (1) on the basis of the difference between the reference image data and the image data acquired by the camera device (22) while the drone (21) is in the airspace above the marine hose (1).

Description

Technical Field

[0001] The invention relates to a monitoring system and method for a ship hose. Background Art

[0002] Various methods and devices for sensing whether a ship hose has fluid leakage have been proposed (for example, see Patent Document 1). In the method proposed in Patent Document 1, a passive IC tag is arranged on a fluid retention layer of a ship hose, and the IC tag receives a transmission wave sent from a sensor located outside the ship hose, and the sensor receives a reply wave sent by the IC tag in response to the transmission wave. Then, based on the strength of the reply wave received by the sensor, it is determined whether the ship hose has fluid leakage.

[0003] According to this method, regardless of the operator's level of measurement skills, the presence or absence of fluid leakage can be easily detected through wireless communication between the IC tag and the sensor. However, since a passive IC tag is used, when wireless communication is performed between the IC tag and the sensor, the operator needs to move to the vicinity of the ship hose and bring the sensor close to a position about 1m to 2m away from the IC tag. In addition, in this method, although the internal state of the ship hose, that is, whether there is fluid leakage, can be grasped, the external state of the ship hose cannot be grasped. Therefore, there is room for improvement in more easily grasping the internal and external states of the ship hose.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2020-133766 Summary of the invention

[0007] Problems to be solved by the invention

[0008] An object of the present invention is to provide a monitoring system and method for a ship hose, which can more easily grasp the internal and external conditions of the ship hose.

[0009] Technical means of solving problems

[0010] In order to achieve the above-mentioned purpose, the monitoring system for a ship hose of the present invention comprises a hose body on which a reinforcement layer and a buoyancy layer are stacked in sequence from the inner circumference side between an inner surface layer and an outer surface layer; and connecting metal parts respectively connected to both ends of the hose body in the length direction, and the inner circumference area of ​​the inner surface layer is used as a flow path, characterized in that it comprises: the ship hose; a sensor having a passive IC tag and a sensor part connected to the IC tag; an unmanned aerial vehicle equipped with a communication machine and a camera device for wirelessly communicating with the IC tag; and a computing device that inputs acquisition data acquired by the communication machine and image data acquired by the camera device, the IC tag being arranged on the surface of the ship hose, the sensor being arranged to sense a sensing index preset inside the hose body, and the unmanned aerial vehicle is moved to an airspace near the top of the IC tag. In the state, the IC tag is activated by the transmission wave sent from the communication machine, and the activated IC tag sends a reply wave according to the transmission wave, thereby wireless communication is performed between the IC tag and the communication machine. When the IC tag is activated, the sensing result of the sensing index sensed by the sensor is sent from the IC tag to the communication machine through the reply wave, and is input into the operation device as the acquisition data. The operation device determines the internal state of the ship hose due to the sensing index based on the size of the difference between the input acquisition data and the preset reference data, and the operation device determines the external state of the ship hose based on the difference between the image data acquired by the camera device while the drone is in the airspace above the ship hose and the preset reference image data.

[0011] The monitoring method for a ship hose of the present invention comprises a hose body having a reinforcement layer and a buoyancy layer stacked in sequence from the inner circumference side between an inner surface layer and an outer surface layer; and connecting metal parts respectively connected to both ends of the hose body in the length direction, and the inner circumference area of ​​the inner surface layer is used as a flow path. The monitoring method for a ship hose is characterized in that a sensor having a passive IC tag and a sensor part connected to the IC tag, an unmanned aerial vehicle equipped with a communication machine and a camera device for wirelessly communicating with the IC tag, and a computing device for inputting acquisition data acquired by the communication machine and image data acquired by the camera device is used, the IC tag is arranged on the surface of the ship hose, and the computing device is configured to sense a sensing index preset in the interior of the hose body through the sensor, and the unmanned aerial vehicle is moved to the airspace near the top of the IC tag. In the state, the IC tag is activated by the transmission wave sent from the communication machine, and the IC tag sends a reply wave to the communication machine according to the transmission wave, thereby wireless communication is performed between the IC tag and the communication machine. When the IC tag is activated, the sensing result of the sensing index sensed by the sensor is sent from the IC tag to the communication machine through the reply wave, and is input into the operation device as the acquisition data. The operation device determines the internal state of the ship hose due to the sensing index based on the size of the difference between the input acquisition data and the preset reference data, and the operation device determines the external state of the ship hose based on the difference between the image data acquired by the camera device while the drone is in the airspace above the ship hose and the preset reference image data.

[0012] Effects of the Invention

[0013] According to the present invention, by wirelessly communicating between the IC tag and the communication device while the drone is moved to the airspace above the IC tag, the sensing result of the sensing index sensed by the sensor can be obtained. Therefore, it is not necessary for the operator to move to the vicinity of the IC tag to bring the communication device close to the IC tag, which greatly helps to reduce the workload. In addition, the internal state of the ship hose due to the sensing index can be judged based on the size of the difference between the acquired data and the pre-set reference data by the computing device that has input the sensing result as the acquired data. In addition, the external state of the ship hose can be judged by the computing device based on the difference between the image data acquired by the camera device while the drone is in the airspace above the ship hose and the pre-set reference image data. Therefore, it is helpful to more easily grasp the internal and external states of the ship hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an explanatory diagram showing an example of an embodiment of the monitoring system.

[0015] Figure 2 Yes Figure 1 An explanatory diagram showing a partially enlarged longitudinal section of a ship hose.

[0016] Figure 3 So Figure 2 An explanatory diagram showing a part of a ship hose by way of example, taken along the AA cross-sectional view.

[0017] Figure 4 Yes Figure 2 An explanatory diagram showing an enlarged view of a sensor in longitudinal section.

[0018] Figure 5 (A) is an explanatory diagram showing an example of reference image data of a ship hose. Figure 5 (B) is an explanatory diagram showing an example of image data of a ship hose acquired by a camera device.

[0019] Figure 6 (A) is an explanatory diagram showing an example of other reference image data for a ship hose. Figure 6 (B) is an explanatory diagram showing an example of other image data of the ship hose acquired by the camera device.

[0020] Figure 7 This is an explanatory diagram showing an example of the configuration of a monitoring system in which a computing device and terminal equipment are connected via a communication network.

[0021] Figure 8 This is an explanatory diagram that shows, in a longitudinal cross-sectional view, a partial enlargement of another ship hose to which the monitoring system is applied.

[0022] Fig. 9 So Figure 8 An explanatory diagram showing a part of a ship hose by way of example, taken along the BB cross-sectional view.

[0023] Fig.10 Yes Figure 8 An explanatory diagram showing an enlarged view of the housing and sensor portion of the device in a longitudinal cross-sectional view.

[0024] Fig.11 This is an explanatory diagram showing a sensor from a top view as an example.

[0025] Fig.12 This is an example from a side view. Fig.11 Illustration of the sensor.

[0026] Fig.13This is an explanatory diagram showing an example of the configuration of a loop circuit by partially cutting away a ship hose from a top view.

[0027] Fig.14 This is an explanatory diagram showing another configuration of the loop loop by partially cutting away a ship hose and viewing it from the top.

[0028] Fig.15 yes Fig.14 CC cross-section diagram. DETAILED DESCRIPTION

[0029] Next, a monitoring system for a hose for a ship (hereinafter referred to as a monitoring system) and a monitoring method according to the present invention will be described based on the embodiments shown in the drawings.

[0030] Figure 1 The embodiment of the monitoring system shown as an example in the embodiment is applied to a floating ship hose 1 used in a state of floating on the water surface, and is used to grasp the internal and external conditions of the ship hose 1. The ship hose 1 is composed of a cylindrical hose body and connecting metal fittings 2 connected to both ends of the hose body in the long dimension direction. Each connecting metal fitting 2 has a pipe joint 2b extending in the longitudinal direction of the hose body and a flange 2a joined to one end of the pipe joint 2b in the longitudinal direction. The ship hoses 1 are connected to each other by the connecting metal fittings 2. Generally, about 10 ship hoses 1 are connected and used.

[0031] like Figure 2 , Figure 3 As shown in the example, in the hose body of the ship hose 1, the inner surface layer 3, the first reinforcement layer 4, the main body layer 5, the fluid retention layer 7, the second reinforcement layer 6, the buoyancy layer 8, and the outer surface layer 9 are sequentially stacked from the inner circumference to the outer circumference. The ship hose 1 is a double-framed layer type having the first reinforcement layer 4 and the second reinforcement layer 6 stacked at intervals in the radial direction of the hose body via the fluid retention layer 7. The main body layer 5 can be arbitrarily arranged. The inner circumference area of ​​the inner surface layer 3 is a flow path 1a of the fluid L. Examples of the fluid L include crude oil, heavy oil, gasoline, LPG (Liquefied Petroleum Gas), water, seawater, chemicals (alcohols obtained by refining gasoline), etc.

[0032] The inner surface layer 3 is made of a material having excellent durability and corrosion resistance to the fluid L, selected from a suitable material according to the type of the fluid L. When the fluid L is crude oil, heavy oil, gasoline, etc., the inner surface layer 3 is made of nitrile rubber or the like having excellent oil resistance.

[0033] The first reinforcement layer 4 and the second reinforcement layer 6 are respectively formed by laminating a plurality of reinforcement cord layers formed by rubber-coated parallel reinforcement cords. The main body wire layer 5 is formed by spirally winding metal wires at predetermined intervals on the outer peripheral surface of the first reinforcement layer 4. The first reinforcement layer 4, the main body wire layer 5, and the second reinforcement layer 6 are fixed to the respective pipe nipples 2b using pipe nipple wires 4w, 5w, 6w located at both ends of each and fixing rings 2c protruding from the outer peripheral surface of the pipe nipples 2b at both ends of the hose body. The fluid retention layer 7 formed between the first reinforcement layer 4 and the second reinforcement layer 6 becomes a space for storing the fluid L leaking from the flow path 1a.

[0034] The buoyancy layer 8 is made of a material such as sponge rubber or foamed polyurethane that exerts buoyancy to make the ship hose 1 float on the sea. The outer surface layer 9 is made of a water-impermeable material such as rubber, and has a reference line RL and the like with excellent visual visibility on its surface.

[0035] The monitoring system includes a ship hose 1, a sensor 10, an unmanned aerial vehicle 21 equipped with a communication device 19 and a camera device 22, and a computing device 20. In this embodiment, the computing device 20 is arranged at a location away from the use location of the ship hose 1, and the communication device 19 and the computing device 20 are separate and independent structures, but the communication device 19 and the computing device 20 may be integrated and mounted on the unmanned aerial vehicle 21.

[0036] like Figure 4 As shown in the example, the sensor 10 includes a passive IC tag 11 and a sensor unit 15 connected to the IC tag 11. The IC tag 11 is disposed on the surface of the ship hose 1 and is located above the water. The sensor 10 is configured to sense a preset sensing index ix inside the hose body. In this embodiment, the sensing index ix is ​​a pressure value between the inner surface layer 3 and the second reinforcement layer 6 (fluid retention layer 7), and a pressure sensor 15a is used as the sensor unit 15. In addition, in the monitoring system, the internal state of the ship hose 1 due to the sensing index ix is ​​determined by the computing device 20, whether the fluid L leaks from the flow path 1a.

[0037] The IC tag 11 has an IC chip 12 and an antenna unit 13 connected to the IC chip 12. The pressure sensor 15a is connected to the IC tag 11 (IC chip 12). The size of the IC chip 12 is very small, for example, the longitudinal dimension and the lateral dimension are respectively less than 50 mm (less than 50 mm in terms of outer diameter), and the thickness is less than 5 mm. The size of the antenna unit 13 is also very small, for example, the longitudinal dimension and the lateral dimension are respectively less than 50 mm (less than 50 mm in terms of outer diameter), and the thickness is less than 10 mm. In this embodiment, since a ceramic antenna is used as the antenna unit 13, it becomes very compact.

[0038] The IC chip 12 stores other necessary information as needed in addition to tag-specific information such as the identification number of the IC tag 11. The IC tag 11 adopts a standard that is generally available, and for example, an RFID tag can be used.

[0039] The IC tag 11 is preferably disposed at the longitudinal end of the ship hose 1. In this embodiment, the IC tag 11 is disposed on the surface of the connecting metal member 2 (the outer peripheral surface of the pipe joint 2b) at one longitudinal end of the hose body. Figure 4 As shown in the example, the IC tag 11 and the pressure sensor 15a are provided inside the housing 18. The housing 18 has a cylindrical base 18a and a cover 18b attached to the upper end of the base 18a.

[0040] The base 18a is erected on the outer peripheral surface of the pipe joint 2b covered by the outer surface layer 9. The base 18a is formed of a metal such as stainless steel. The cover 18b is screwed with the upper end of the base 18a to watertightly block the upper end opening, and the IC tag 11 and the pressure sensor 15a are arranged in the watertightly blocked internal space of the housing 18. The cover 18b is formed of a material that allows the transmitted radio wave R1 and the reply radio wave R2 to pass through, and as such a material, polycarbonate, polyamide, epoxy resin, etc. are used. The housing 18 (cover 18b) can be designed to be orange, for example, to make it eye-catching in the ocean.

[0041] Regarding the IC tag 11 and the pressure sensor 15a, a check valve 15e is provided at the lower part of the internal space where the IC tag 11 and the pressure sensor 15a are arranged. In addition, a connecting pipe 15d connected to the fluid retention layer 7 is connected to the lower end of the base 18a. Therefore, the space below the base 18a is connected to the fluid retention layer 7, but the check valve 15e is sandwiched between the internal space where the IC tag 11 and the pressure sensor 15a are arranged, so that the internal space becomes a pressure-maintaining chamber.

[0042] The check valve 15e allows only the flow of fluid L and gas to the pressure-maintaining chamber, and restricts the flow from the pressure-maintaining chamber to the communicating tube 15d. Therefore, when the pressure value of the pressure-maintaining chamber rises, the pressure state is maintained. The check valve 15e may be a known check valve.

[0043] The pressure sensor 15a senses the pressure value of the pressure holding chamber, and then inputs the sensed pressure value into the computing device 20 as the acquired data Dr acquired by the communication device 19. The pressure sensor 15a may use a known pressure sensor. The size of the pressure sensor 15a is about the same as that of the IC chip 12. In addition, in the drawings, the IC chip 12 and the pressure sensor 15a are in a suspended state, but they may also be designed to be in a flat state like the antenna portion 13.

[0044] like Figure 2As shown in the example, the communication device 19 includes a radio wave transmitting unit 19a and a radio wave receiving unit 19b. The radio wave transmitting unit 19a transmits a transmission radio wave R1 to the IC tag 11. The IC tag 11 generates power by receiving the transmission radio wave R1 from the antenna unit 13, and the IC tag 11 is activated. Using this power, the activated IC tag 11 transmits a reply radio wave R2 through the antenna unit 13, and the reply radio wave R2 is received by the radio wave receiving unit 19b. In this way, the reply radio wave R2 is transmitted according to the transmission radio wave R1, thereby performing wireless communication between the IC tag 11 and the communication device 19.

[0045] As the communication device 19, a commonly used specification that can wirelessly communicate with a passive RFID tag is adopted. Thus, the IC tag 11 and the communication device 19 constitute an RFID (Radio Frequency IDentification) system. Since a passive IC tag 11 is used, the communication distance of the radio waves R1 and R2 between the IC tag 11 and the communication device 19 is, for example, about several tens of centimeters to several meters.

[0046] The frequency of the radio waves (R1, R2) used for wireless communication between the IC tag 11 and the communicator 19 is mainly in the UHF band (varies by country, but is within the range of 860 MHz to 930 MHz, and in Japan it is within the range of 915 MHz to 930 MHz), and the HF band (13.56 MHz) can also be used.

[0047] The camera device 22 acquires image data of the ship hose 1 from the airspace above the ship hose 1. As the camera device 22, various known digital cameras for acquiring image data Mr of a still image or a moving image can be used.

[0048] The drone 21 can adopt a known specification that can carry the above-mentioned communication device 19 and camera device 22, fly to a desired position, and hover at a fixed position. The drone 21 is provided with a GNSS receiver 23, and the position coordinates of the drone 21 are grasped in real time by GNSS. By inputting the position coordinates of the desired position into the control unit of the drone 21, the drone 21 can be flown to the desired position through automatic control operation.

[0049] A known computer is used as the calculation device 20, and the calculation device 20 performs various calculation processes using input data. The calculation device 20 receives input data Dr acquired by the communication device 19 and image data Mr acquired by the camera device 22.

[0050] Input the following information to the computing device 20: Figure 5 (A) Figure 6(A) shows an example of reference image data Mc showing a state where a perfect ship hose 1 is not twisted and extends in a straight line. The reference image data Mc may be image data actually photographed from the airspace above the ship hose 1, or may be data created based on design data or the like. The line RL provided on the surface of the ship hose 1 is a reference line RL extending parallel to the axis of the ship hose 1. For example, the linearity of the reference line RL may be used as the reference image data Mc. An output device such as a monitor is connected to the computing device 20.

[0051] Hereinafter, an example of a procedure for grasping the internal and external states of the ship hose 1 will be described using an embodiment of the monitoring system.

[0052] like Figure 1 As shown in the example, the drone 21 is set to the following state: it takes off from a measurement base such as land or a ship and moves to the airspace above the IC tag 11 arranged on the surface of the ship hose 1. For example, based on the position information of the ship hose 1 known in advance, the drone 21 is moved to the airspace above the IC tag 11 by automatic operation using the GNSS receiver 23 installed on the drone 21. When wireless communication is performed between the IC tag 11 and the communication device 19, the drone 21 is positioned in the airspace above the IC tag 11 by continuous automatic operation, so that the distance between the IC tag 11 and the communication device 19 is about 1m. Alternatively, the drone 21 can be positioned in the airspace above the IC tag 11 by the operation of the drone operator based on the image data acquired in real time by the camera device 22.

[0053] like Figure 2 As shown in the example, when the drone 21 (communication device 19) is positioned in the airspace above the IC tag 11, the IC tag 11 is activated by the transmission radio wave R1 sent from the radio wave transmitting unit 19a. The reply radio wave R2 sent from the IC tag 11 according to the transmission radio wave R1 is received by the radio wave receiving unit 19b, and wireless communication is performed between the IC tag 11 and the communication device 19.

[0054] When the IC tag 11 is activated, the pressure value sensed by the pressure sensor 15a is transmitted from the IC tag 11 to the communication device 19 through the reply radio wave R2 as the sensing result of the sensing index ix sensed by the sensor 10, and is input to the operation device 20 as the acquisition data Dr. The operation device 20 determines whether the fluid L leaks from the flow path 1a, which is the internal state of the ship hose 1 due to the sensing index ix, based on the difference between the input acquisition data Dr and the preset reference data Dc.

[0055] Here, a preliminary test is performed to obtain the internal pressure data of the fluid retention layer 7 in a good state in which the fluid L does not leak from the flow path 1a, and the data is used as the reference data Dc. When the fluid L leaked from the flow path 1a flows into the fluid retention layer 7, the internal pressure of the fluid retention layer 7 increases. Therefore, for example, if the acquired data Dr exceeds the allowable range of the reference data Dc (for example, 1.1 times or more of the reference data Dc), the computing device 20 determines that the fluid L leaked from the flow path 1a, and if it is within the allowable range, it is determined that the fluid L did not leak. The allowable range can be appropriately set based on the results of the preliminary test.

[0056] Furthermore, if Figure 1 As shown in the example, while the drone 21 is in the airspace above the ship hose 1, the image data Mr of the ship hose 1 is acquired by the camera device 22. Figure 5 (B) Figure 6 (B) As shown in the example, it is preferable to acquire image data Mr covering the entire length of the marine hose 1 (hose body). The timing for acquiring the image data Mr may be before or after wireless communication between the IC tag 11 and the communication device 19 is performed.

[0057] The acquired image data Mr is input to the computing device 20. The computing device 20 determines the external state of the ship hose 1 based on the difference between the acquired image data Mr and the preset reference image data Mc. Figure 5 (A) The reference image data Mc and Figure 5 (B) shows an example of the baseline RL of each of the acquired image data Mr. Figure 5 (A) baseline RL, Figure 5 If the deviation degree (bending degree) of the reference line RL of (B) exceeds the preset permissible range, the computing device 20 determines that the ship hose 1 has abnormal bending. If it is within the permissible range, it determines that no abnormal bending has occurred. Figure 5 (A) The reference image data Mc and Figure 5 (B) is overlapped with the image data Mr of the reference image data Mc, and the degree of curvature of the ship hose 1 can be easily calculated by the computing device 20. The curvature radius of the reference line RL in the image data Mr can also be calculated by the computing device 20, and compared with the straight line (curvature radius is infinite) of the reference line RL as the reference image data Mc. Alternatively, the contours of the hose bodies of the reference image data Mc and the image data Mr can be compared.

[0058] Or, compare Figure 6 (A) The reference image data Mc and Figure 6 (B) The baseline RL of each of the acquired image data Mr. Figure 6(A) baseline RL, Figure 6 If the degree of deviation (twisting degree) of the reference line RL in the circumferential direction of (B) exceeds the preset permissible range, the computing device 20 determines that the marine hose 1 is abnormally twisted. If it is within the permissible range, it determines that no abnormal twisting has occurred. Figure 6 (A) The reference image data Mc and Figure 6 (B) is overlapped, and the twisting state of the ship hose 1 can be easily calculated by the computing device 20. More preferably, it is determined Figure 5 The bending degree and Figure 6 The external state of the ship hose 1 is grasped by checking both degrees of twisting of the ship hose 1 as an example, rather than checking whether any one of them is abnormal.

[0059] In addition to the pressure sensor 15a, a temperature sensor 15b may be used instead. That is, by using the temperature sensor 15b, the sensing index ix is ​​set to the temperature between the inner surface layer 3 and the second reinforcement layer 6 (fluid retention layer 7). Then, the internal state of the ship hose 1 due to the sensing index ix is ​​grasped, that is, whether the inside of the ship hose 1 is abnormally heated. The temperature sensor 15b may be arranged at a position closer to the connecting pipe 15d side than the check valve 15e inside the housing 18, or may be arranged inside the fluid retention layer 7. The computing device 20 determines whether the inside of the ship hose 1 is abnormally heated, that is, the internal state of the ship hose 1, based on the size of the difference between the input acquisition data Dr (temperature data acquired by the temperature sensor 15b) and the preset reference data Dc (reference temperature data).

[0060] According to the monitoring system, when wireless communication is performed between the IC tag 11 and the communication device 19, it is sufficient to move the drone 21 to the airspace above the IC tag 11. Therefore, it is not necessary for the operator to move to the vicinity of the IC tag 11 to bring the communication device 19 close to the IC tag 11, so that the workload is greatly reduced. In addition, since the internal state of the ship hose 1 due to the sensing index ix is ​​determined by the computing device 20, the internal state of the ship hose can be more easily grasped based on the judgment result. In addition, since the computing device 20 determines the external state of the ship hose 1 based on the difference between the image data Mr of the ship hose 1 from the upper airspace acquired by the camera device 22 and the reference image data Mc, the external state of the ship hose 1 can be more easily grasped based on the judgment result.

[0061] like Figure 7As shown in the example, the computing device 20 may be designed to be connected to the required terminal device 24 via a communication network such as the Internet. For example, various information (data) is transmitted from the computing device 20 to the terminal device 24 of a related company such as a management office of a company (user) operating the ship hose 1, a sales company of the ship hose 1, a manufacturing company, etc. located far from the place where the ship hose 1 is used. The information transmitted to each terminal device 24 is, for example, the acquisition data Dr acquired by the communication device 19, the judgment result of the internal state of the ship hose 1 by the computing device 20 due to the sensing index ix, the image data Mr acquired by the camera device 22, and the judgment result of the external state of the ship hose 1 by the computing device 20. According to this structure, the related company having these terminal devices 24 can grasp the internal and external states of the ship hose 1 at a place far from the place where the ship hose 1 is used.

[0062] In the application Figure 8 to Figure 10 The hose body of the ship hose 1 of the monitoring system embodiment shown as an example has an inner surface layer 3, a first reinforcement layer 4, a buoyancy layer 8, and an outer surface layer 9 stacked in order from the inner circumference to the outer circumference. Since the ship hose 1 does not have a fluid retention layer 7, it is a single-frame type.

[0063] The first reinforcement layer 4 is formed by laminating a plurality of reinforcement cord layers 4A to 4H formed by covering a plurality of parallel reinforcement cords with rubber. In this embodiment, a reinforcement cord layer group formed by laminating eight reinforcement cord layers 4A to 4H is the first reinforcement layer 4, and the number of laminations of the reinforcement cord layers 4A to 4H is appropriately determined based on the performance required of the ship hose 1.

[0064] Compared with the previous embodiment, the embodiment of the monitoring system is different in the structure of the sensor 10, and the other structures are substantially the same. In this embodiment, the sensing index ix is ​​the resistance value between the inner surface layer 3 and the second reinforcement layer 6, and the detection element 15c is used as the sensor part 15. In addition, in this monitoring system, the internal state of the ship hose 1 due to the sensing index ix is ​​determined by the computing device 20, whether the fluid L leaks from the flow path 1a.

[0065] like Fig.11 , Fig.12 As shown in the example, the sensor 10 used in this embodiment has a passive IC tag 11 and a loop 17 connected to the IC tag 11. The IC tag 11 is arranged on the surface of the ship hose 1 and is located above the water. The loop 17 is formed by the detection element 15c and extends continuously along the length direction of the hose body between the inner surface layer 3 and the first reinforcement layer 4.

[0066] In detail, the IC tag 11 has an IC chip 12 and an antenna unit 13 connected to the IC chip 12. The IC chip 12 and the antenna unit 13 are arranged on a substrate 14. The IC chip 12 and the antenna unit 13 are covered by an insulating layer 14a so that the IC tag 11 is electrically insulated from the outside as a whole. However, the IC tag 11 is electrically connected to the detection element 15c in a manner that allows electricity to flow. The insulating layer 14a is formed of a known insulating material such as insulating rubber, resin such as polyester, and natural fiber.

[0067] The IC chip 12 may store tag-specific information such as the identification number of the IC tag 11, element identification information for specifying the detection element 15c connected to the IC tag 11, and other necessary information. The antenna unit 13 may use various known types, and in this embodiment, a dipole antenna extending symmetrically from the IC chip 12 is used.

[0068] The detection element 15c is a conductive linear body, and is formed of a conductive rubber or conductive paste (a paste containing metal particles) whose resistance value changes by being impregnated with the fluid L flowing in the flow path 1a. The outer diameter (width) of the detection element 15c is, for example, 1 mm to 20 mm, and more preferably 5 mm to 10 mm. The detection element 15c can also be a simple wire with a circular cross section, and is preferably designed as a flat linear body (belt-shaped wire).

[0069] The outer peripheral surface of the detection element 15c is covered by an insulator 16, so that the detection element 15c is electrically insulated from the outside. The insulator 16 is formed of a known insulating material, as is the insulating layer 14a. However, the insulator 16 is formed of a material that allows the fluid L to penetrate, or has a through hole, so that the fluid L can pass through the insulator 16 and reach the detection element 15c.

[0070] One end and the other end of the detection element 15c in the length direction are electrically connected to the IC chip 12, respectively, to form a ring loop 17 outside the IC tag 11. The interval between the detection elements 15c extending in parallel in the ring loop 17 is, for example, 5 mm or more and 50 mm or less. A plurality of paired terminals connected to the IC chip 12 are provided on the IC tag 11 (substrate 14). One end and the other end of the detection element 15c in the length direction are connected to the paired terminals, respectively, so as to be electrically connected to the IC chip 12. The detection element 15c and the paired terminals are connected using a metal ring and a crimping terminal, or are connected by a conductive adhesive, welding, soldering, etc. In this embodiment, 5 pairs of terminals are provided, but the number of paired terminals provided on the IC tag 11 (substrate 14) is not particularly limited and may be 1. Due to space constraints, the number of paired terminals provided on one IC tag 11 (substrate 14) is, for example, about 1 to 6.

[0071] The annular loop 17 (detection element 15c) preferably extends continuously from one end of the hose body to the other end in the length direction to cover the entire length of the hose body. Fig.10 As shown in the example, the IC tag 11 is provided inside the housing 18. The cover 18b is screwed to the upper end of the base 18a to watertightly close the upper end opening, and the IC tag 11 is arranged in the watertightly closed internal space of the housing 18.

[0072] The detection element 15c (annular loop 17) extends from the inside of the housing 18 to the hose body, is arranged between the inner surface layer 3 and the first reinforcement layer 4 in the hose body, and extends continuously from one end to the other end in the length direction of the hose body. Fig.13 As shown in the example, the annular loop 17 is wound in a spiral shape relative to the hose body and extends from one end to the other end in the length direction of the hose body. That is, the annular loop 17 is wound in a spiral shape on the outer peripheral surface of the inner surface layer 3. The spiral pitch of the annular loop 17 is, for example, not less than 20 cm and not more than 50 cm. It should be noted that the single-point chain line CL in the figure is the axis passing through the cross-sectional center CL of the ship hose 1 (hose body). If the annular loop 17 is extended in a spiral shape like this, there is an advantage that the entire range of the hose body can be effectively covered even if there is only one annular loop 17.

[0073] like Fig.14 , Fig.15 As shown in the example, multiple independent annular loops 17 can also be arranged at intervals in the circumferential direction relative to the hose body so that they extend linearly in the length direction of the hose body. The annular loops 17 are preferably arranged at equal intervals along the circumferential direction of the hose body. Fig.14 , Fig.15 The specification shown as an example has the advantage that even if one of the loop circuits 17 fails for some reason, the presence or absence of leakage of the fluid L can be sensed through the other loop circuits 17. In addition, compared with the case where the loop circuits 17 are extended in a spiral shape, the total length of each loop circuit 17 can be shortened, which is advantageous for more sensitively (highly sensitively) sensing the change in the resistance value in each loop circuit 17.

[0074] Hereinafter, an example of a procedure for grasping the internal state of the ship hose 1 using the embodiment of the monitoring system will be described. This embodiment differs from the previous embodiment only in the sensing index ix, and the rest is substantially the same as the previous embodiment, so the difference from the previous embodiment will be described here. The procedure for grasping the external state of the ship hose 1 is the same as the previous embodiment.

[0075] The antenna unit 13 receives the transmission wave R1 transmitted from the radio wave transmitting unit 19a, and when the IC tag 11 is activated, a current flows through the loop 17. The resistance value data in the loop 17 is transmitted from the IC tag 11 to the communicator 19 through the reply wave R2 as the sensing result of the sensing index ix sensed by the sensor 10. The resistance value data is received by the radio wave receiving unit 19b, and then input into the computing device 20 as the acquired data Dr acquired by the communicator 19.

[0076] The computing device 20 determines whether the fluid L leaks from the flow path 1a based on the difference between the input acquisition data Dr and the reference resistance value data pre-set as the reference data Dc. When the inner surface layer 3 is intact and the fluid L does not leak from the inner surface layer 3, the acquisition data Dr is substantially the same as the reference data Dc, with almost no difference.

[0077] On the other hand, if the inner surface layer 3 is damaged and the fluid L leaks out of the flow path 1a to the outside of the inner surface layer 3, the fluid L contacts the detection element 15c forming the loop 17, and the resistance value of the loop 17 changes rapidly and greatly (becomes extremely large), becoming an insulating state or a state close to insulating. That is, the resistance value data (acquisition data Dr) of the loop 17 when the IC tag 11 is activated becomes significantly larger than the reference data Dc.

[0078] Therefore, the computing device 20 compares the input acquisition data Dr with the reference data Dc. If the acquisition data Dr is greater than the reference data Dc and exceeds the allowable range, the computing device 20 determines that the fluid L has leaked from the flow path 1a, and if it is within the allowable range, the computing device 20 determines that the fluid L has not leaked.

[0079] Figure 8 to Figure 15 The embodiment shown by way of example is not limited to the single-frame type ship hose 1, and can also be applied to the double-frame type ship hose 1 having the fluid retention layer 7 on the hose body. In the double-frame type ship hose 1, as described above, the loop 17 can be arranged on the outer peripheral surface of the inner surface layer 3, or on the fluid retention layer 7. When the loop 17 is arranged on the fluid retention layer 7, the loop 17 only needs to extend continuously from one end of the hose body in the longitudinal direction to a position of, for example, 20% to 50% of the total length of the hose body. This is because when the fluid L flows into a part of the fluid retention layer 7, the fluid L will gradually spread over the entire length of the fluid retention layer 7.

[0080] The following structure may also be designed: in the computing device 20, the acquired image data Mr is associated with the sensing result acquired by the sensor 10, and the presence or absence of leakage of the fluid L from the flow path 1a is determined based on the difference between the image data Mr and the reference image data Mc. That is, when determining whether the fluid L is leaking from the flow path 1a, not only the sensing result of the sensing index ix sensed by the sensor 10 but also the image data Mr can be used.

[0081] For example, when the detection element 15c bends along with the local bending of the ship hose 1, the resistance value of the detection element 15 increases to some extent. Therefore, it is unclear whether the change in the resistance value of the detection element 15c is caused by the fluid L being impregnated in the detection element 15c or by the bending of the detection element 15c. That is, if the presence or absence of fluid L leakage from the flow path 1a is determined only based on the resistance value data (acquisition data Dr) in the loop 17 sensed by the sensor 10, it is not conducive to accurately determining the presence or absence of fluid L leakage.

[0082] Therefore, when judging the presence or absence of leakage of the fluid L based on the difference between the image data Mr of the ship hose 1 from the upper airspace acquired by the drone 21 and the reference image data Mc, it is necessary to decide whether to consider the image data Mr. If the difference (degree of bending) between the image data Mr and the reference image data Mc is small and within the allowable range, it is considered that the bending state of the ship hose 1 does not affect the size of the resistance value data (acquired data Dr) in the loop 17, and the image data Mr is ignored. Then, judging the presence or absence of leakage of the fluid L from the flow path 1a is performed based only on the size of the difference between the acquired data Dr and the reference data Dc input to the computing device 20.

[0083] On the other hand, if the difference (bending degree) between the image data Mr and the reference image data Mc is large and exceeds the permissible range, it is considered that the bending state of the ship hose 1 affects the size of the resistance value data (acquired data Dr) in the loop 17. Then, the image data Mr is considered, and the presence or absence of fluid L leakage from the flow path 1a is determined based on the size of the difference between the acquired data Dr input to the computing device 20 and the reference data Dc. The permissible range is grasped and set to an appropriate range by performing a prior test, etc. When the image data Mr is considered, for example, the resistance value data (acquired data Dr) is multiplied by a coefficient (<1) according to the bending radius of the ship hose 1 in the image data Mr. The smaller the bending radius of the ship hose 1 in the image data Mr, the smaller the multiplication coefficient is, thereby canceling the influence of the increase in the resistance value data (acquired data Dr) due to the bending of the ship hose 1. The coefficient can be grasped and set to an appropriate value by performing a prior test, etc.

[0084] Description of Reference Numerals

[0085] 1: Marine hose

[0086] 1a: Flow path

[0087] 2: Connecting metal parts

[0088] 2a: Flange

[0089] 2b: Pipe joint

[0090] 2c: Fixed ring

[0091] 3: Inner surface layer

[0092] 4: First enhancement layer

[0093] 4A~4H: Reinforced cord layer

[0094] 4w: pipe joint line

[0095] 5: Main line layer

[0096] 5w: pipe joint line

[0097] 6: Second enhancement layer

[0098] 6w: pipe joint line

[0099] 7: Fluid retention layer

[0100] 8: Buoyancy layer

[0101] 9: Outer surface layer

[0102] 10: Sensors

[0103] 11: IC tag

[0104] 12: IC chip

[0105] 13: Antenna

[0106] 14: Substrate

[0107] 14a: Insulation layer

[0108] 15: Sensor unit

[0109] 15a: Pressure sensor

[0110] 15b: Temperature sensor

[0111] 15c: Detection element

[0112] 15d: connecting pipe

[0113] 15: Check valve

[0114] 16: Insulator

[0115] 17: Ring loop

[0116] 18: Shell

[0117] 18a: Base

[0118] 18b: Cover

[0119] 19: Communication machine

[0120] 19a: Radio wave transmission unit

[0121] 19b: Radio wave receiving unit

[0122] 20: Computing device

[0123] 21: Drones

[0124] 22: Camera rig

[0125] 23: GNSS Receiver

[0126] 24: Terminal equipment

Claims

1. A monitoring system for a ship hose, comprising a hose body having a reinforcement layer and a buoyancy layer stacked in order from the inner circumference between an inner surface layer and an outer surface layer; and connecting metal fittings connected to both ends of the hose body in the longitudinal direction, and using the inner circumference area of ​​the inner surface layer as a flow path, wherein A device comprising the above-mentioned ship hose; a sensor having a passive IC tag and a sensor unit connected to the IC tag; a drone equipped with a communication device and a camera device for wirelessly communicating with the IC tag; and a computing device that inputs acquisition data acquired by the communication device and image data acquired by the camera device, The IC tag is disposed on the surface of the ship hose, and the sensor is configured to sense a preset sensing index inside the hose body. When the drone is moved to the airspace above the IC tag, the IC tag is activated by the transmission radio wave sent from the communication device. The activated IC tag sends a reply radio wave based on the transmission radio wave, thereby performing wireless communication between the IC tag and the communication device. When the IC tag is activated, the sensing result of the sensing index sensed by the sensor is sent from the IC tag to the communication device through the reply radio wave and input into the operation device as the acquisition data. The operation device determines the internal state of the ship hose due to the sensing index based on the size of the difference between the input acquisition data and the preset reference data. In addition, the operation device determines the external state of the ship hose based on the difference between the image data acquired by the camera device while the drone is in the airspace above the ship hose and the preset reference image data.

2. A monitoring system for a ship hose according to claim 1, wherein the sensing index is at least one of a pressure value or a resistance value between the inner surface layer and the reinforcement layer, and whether or not there is fluid leakage from the flow path can be determined based on the sensing index as an internal state of the ship hose.

3. The monitoring system for a ship hose according to claim 2, wherein in the computing device, the image data is associated with the sensing result, and the presence or absence of leakage of the fluid from the flow path is determined based on a difference between the image data and the reference image data.

4. A monitoring system for a ship hose according to any one of claims 1 to 3, wherein the drone moves to the airspace above the IC tag through automatic operation based on pre-acquired position information of the ship hose, and when wireless communication is performed between the IC tag and the communicator, the drone is positioned in the airspace near the top of the IC tag through automatic operation or manipulation by the drone operator based on the image data acquired in real time by the camera device.

5. A monitoring system for a ship hose according to any one of claims 1 to 4, wherein the computing device is connected to a plurality of terminal devices via a communication network, and the acquired data, the judgment result of the computing device on the internal state of the ship hose due to the sensing index, the image data, and the judgment result of the computing device on the external state of the ship hose are sent from the computing device to each of the terminal devices.

6. A method for monitoring a ship hose, comprising a hose body having a reinforcing layer and a buoyancy layer laminated in order from the inner circumference between an inner surface layer and an outer surface layer; and connecting metal fittings connected to both ends of the hose body in the longitudinal direction, and using the inner circumference area of ​​the inner surface layer as a flow path. A sensor having a passive IC tag and a sensor unit connected to the IC tag, a drone equipped with a communication device for wirelessly communicating with the IC tag and a camera device, and a computing device that inputs acquired data acquired by the communication device and image data acquired by the camera device, The IC tag is arranged on the surface of the ship hose and is arranged to sense a preset sensing index inside the hose body through the sensor. When the drone is moved to the airspace above the IC tag, the IC tag is activated by the transmission radio wave sent from the communication device, and the IC tag sends a reply radio wave to the communication device based on the transmission radio wave, thereby performing wireless communication between the IC tag and the communication device. When the IC tag is activated, the sensing result of the sensing index sensed by the sensor is sent from the IC tag to the communication device through the reply radio wave and input into the operation device as the acquisition data. The operation device determines the internal state of the ship hose due to the sensing index based on the size of the difference between the input acquisition data and the preset reference data, and the operation device determines the external state of the ship hose based on the difference between the image data acquired by the camera device while the drone is in the airspace above the ship hose and the preset reference image data.

Images