CN107532880B

CN107532880B - System and method for inspecting cylinder liner, holder for imaging device, and cylinder liner

Info

Publication number: CN107532880B
Application number: CN201580075666.6A
Authority: CN
Inventors: 射手充代; 中谷博司; 庄司勉
Original assignee: Nippon Yusen KK
Current assignee: Nippon Yusen KK
Priority date: 2015-02-17
Filing date: 2015-02-17
Publication date: 2020-03-06
Anticipated expiration: 2035-02-17
Also published as: CH712356B1; KR101946475B1; KR20170117164A; CN107532880A; JP6564844B2; DK181049B1; CN110500196A; WO2016132457A1; DK201700501A1; JPWO2016132457A1

Abstract

The invention provides a means for easily and accurately evaluating the wear state of a cylinder liner of an engine. The serviceman places the camera 14 on the upper surface of the piston 54 and reciprocates the piston 54 once in the cylinder 51. When the imaging device 14 reaches a predetermined position in the moving direction of the piston 54 during the period in which the piston 54 reciprocates once, the terminal apparatus 11 transmits instruction data to the imaging device 14 based on the crank angle data transmitted from the crank angle measuring device 8. The imaging device 14 images the inner surface of the cylinder liner 53 and the ignition surface of the cylinder head 52 based on the instruction data, and transmits the generated image data to the terminal apparatus 11.

Description

System and method for inspecting cylinder liner, holder for imaging device, and cylinder liner

Technical Field

The present invention relates to a technique for inspecting a cylinder liner of an engine.

Background

In a large engine such as an engine mounted on a large ship, a wear state of a cylinder liner is inspected as a maintenance work.

As one method of checking the wear state of the cylinder liner, there is a method in which a serviceman enters the cylinder to directly visually recognize or photograph the inner side surface of the cylinder liner.

As another method of inspecting the wear state of the cylinder liner, there is a method in which a serviceman photographs the inner surface of the cylinder liner with an imaging device inserted into the cylinder from a scavenging port provided in the cylinder.

As a document disclosing a technique for inspecting a wear state of a component of an engine, for example, patent document 1 is disclosed. Patent document 1 discloses a technique in which, in order to cover a machined groove formed during machining of a piston of an engine, the machined groove is coated with a paint, the paint has a color different from that of the main body of the piston, the piston is taken out of a cylinder of the engine after the engine is operated by the coated piston, the side surface of the piston is photographed by an image pickup device, and the degree of wear of the piston is determined based on the brightness of the photographed image.

Documents of the prior art

Non-patent document

Patent document 1: japanese laid-open patent publication No. 8-247724

Problems to be solved by the invention

In order for a serviceman to enter the cylinder to perform a method of directly visualizing or photographing the inner side surface of the cylinder liner (hereinafter, referred to as "direct access method"), it is necessary to open the cylinder head, which requires much time and labor. Therefore, it is difficult to frequently implement the direct approach method. In addition, immediately after the engine stops operating, the temperature in the cylinder is high, and thus maintenance personnel cannot enter the cylinder. Therefore, the direct approach method can be performed only after the inside of the cylinder is cooled, and the operation takes a long time. In the direct approach method, a maintenance worker needs to go up and down a ladder in the cylinder, and a physical burden is also large along with a risk of falling or the like.

On the other hand, in the case of a method of imaging the inner surface of the cylinder liner by an imaging device inserted from the scavenging port (hereinafter referred to as "fixed-point imaging method"), a clear image cannot be obtained in the vicinity of the cylinder head far from the scavenging port. In general, the wear rate of the cylinder liner is faster near the top than near the bottom, and therefore, in order to sufficiently evaluate the wear state of the cylinder liner, not only near the bottom but also a clear image about the vicinity of the top is required. Therefore, according to the fixed-point imaging method in which a clear image about the vicinity of the top portion cannot be obtained, the wear state of the cylinder liner cannot be sufficiently evaluated.

In addition, according to either of the direct approach method or the fixed point imaging method, it is difficult to check the position of the same cylinder liner in different images captured at different times. Therefore, the change in the wear state of a specific region of the cylinder liner cannot be easily known.

In view of the above problems, an object of the present invention is to provide a means capable of easily and accurately evaluating the wear state of a cylinder liner.

Disclosure of Invention

In order to solve the above problems, the present invention provides a system for inspecting a cylinder liner, comprising: an imaging device configured to be placed on an upper surface of a piston of an engine, to photograph an inner side surface of a cylinder liner covering an inner side surface of a cylinder that houses the piston, and to generate cylinder liner image data representing the photographed image; and a position data acquiring device that acquires position data indicating a position of the image pickup device in a moving direction of the piston.

The system may be configured to include an instruction device that instructs the imaging device to perform imaging when the position data indicates a predetermined position, and the imaging device performs imaging according to an instruction of the instruction device.

In addition, the above system may also adopt a configuration in which the position data acquisition means acquires crank angle data indicating a crank angle with respect to the piston, and generates the position data using the crank angle data.

In addition, the above system may also be configured to include a distance measuring device configured to be placed on an upper surface of the piston, measure a distance between the upper surface of the piston and a spark surface of a cylinder head placed on a top portion of the cylinder, and generate movement direction distance data indicating the measured distance, the position data obtaining device generating the position data using the movement direction distance data.

In addition, the above system may also employ a configuration in which the imaging device captures a fire surface of a cylinder head placed on the top of the cylinder and generates fire surface image data representing the captured image, and the position data acquisition device generates the position data using the fire surface image data.

In addition, the above system may also adopt a configuration in which the position data acquiring means generates the position data using the cylinder liner image data.

In addition, the above system may be configured to include a direction data acquiring device that acquires direction data indicating a shooting direction of the imaging device.

In addition, the above system may also employ a configuration in which the imaging device captures a fire surface of a cylinder head placed on the top of the cylinder and generates fire surface image data representing the captured image, and the direction data acquisition device generates the direction data using the fire surface image data.

In addition, the above system may also adopt a configuration in which the direction data acquiring means generates the direction data using the cylinder liner image data.

In addition, the above system may also adopt a configuration in which the imaging device measures a distance from the imaging device to the subject and generates imaging distance data indicating the measured distance, and a correction device is included that corrects the cylinder liner image data using the imaging distance data.

In addition, the above system may also employ a configuration in which the imaging device captures a fire surface of a cylinder head placed on the top of the cylinder and generates fire surface image data representing the captured image, and a correction device is included that corrects the cylinder liner image data using the fire surface image data.

In addition, the above system may also be configured to include a wear determining device that determines a degree of wear of the cylinder liner using the cylinder liner image data and generates wear data indicating the determined degree of wear.

In addition, the above system may also employ a configuration in which the imaging device generates cylinder liner pattern data regarding each of a plurality of cylinders of the same type included in an engine provided on one ship or each of a plurality of ships of the same type, including: an attribute data acquisition device that acquires attribute data representing an attribute that affects wear of the cylinder liner, the attribute being an attribute of a voyage that the ship or the ships of the same type have made in the past; and a relation data generating means for generating relation data indicating a relation between the property and the degree of wear of the cylinder liner, using the wear data and the property data.

In addition, the above system may be configured such that the imaging device generates cylinder liner image data on a cylinder included in an engine provided on a ship, and includes: an attribute data acquisition device that acquires attribute data representing an attribute that affects wear of the cylinder liner, the attribute being an attribute of a voyage performed by the ship; a relation data acquiring means that acquires relation data that represents a relation between the attribute and a degree of wear of the cylinder liner; and a wear estimation device that estimates a degree of wear of the cylinder liner using the attribute data and the relationship data, and generates estimated wear data representing the estimated degree of wear.

Further, the above system may be configured to include a notification device that, when a difference between a wear level indicated by the estimated wear data generated by the wear estimation device and a wear level indicated by the wear data generated by the wear determination device satisfies a predetermined condition with respect to the cylinder liner at some time, transmits a predetermined notification to a user.

In addition, the above system may also employ a configuration in which the imaging device generates cylinder liner image data regarding each of a plurality of cylinders of the same type, including: an evaluation data acquiring device that acquires cylinder liner image data generated by the imaging device and evaluation data indicating an evaluation of a state of the cylinder liner based on an image indicated by the cylinder liner image data; and an extracting means for extracting, from the plurality of evaluation data acquired by the evaluation data acquiring means, evaluation data corresponding to cylinder liner image data having a predetermined similarity to the cylinder liner image data specified by the user.

In addition, the above system may be configured such that the imaging device generates cylinder liner pattern data relating to a cylinder included in an engine provided on a ship, and includes: an attribute data acquisition means for acquiring attribute data indicating an attribute of a voyage of the ship performed in the past; and an extracting device for extracting attribute data satisfying a predetermined condition corresponding to the damage from the plurality of attribute data acquired by the attribute data acquiring device when the image represented by the cylinder liner image data generated by the imaging device indicates that the cylinder liner is damaged.

Additionally, the present invention provides a method for inspecting a cylinder liner, comprising: a step of moving a piston of an engine with a camera device placed on the upper surface in a cylinder accommodating the piston; and shooting the inner side surface of the cylinder liner covering the inner side surface of the cylinder by the camera device during the movement of the piston in the cylinder or after the piston finishes moving in the cylinder.

In addition, the present invention provides a holding tool configured to be placed on an upper surface of a piston of an engine, and to prevent heat from being transferred from the piston to an image pickup device for picking up an inner side surface of a cylinder liner covering an inner side surface of a cylinder housing the piston while holding the image pickup device.

The holding tool may have an elastic member provided between the upper surface of the piston and the imaging device.

Further, the holder may have a structure in which characters, symbols, or figures indicating the imaging direction of the imaging device are provided in the imaging region of the imaging device.

The holder may have a leg for supporting the imaging device, and the imaging device may be spaced from the upper surface of the piston.

The holding tool may have a rod-like body that is insertable into a recess provided in an upper surface of the piston.

The holding tool may have a contact surface whose shape is engaged with the shape of the upper surface of the piston.

In addition, the present invention provides a cylinder liner for an engine having an inner side surface on which a pattern is formed, wherein at least one of a size, a shape, and a direction of the pattern changes as wear progresses.

The cylinder liner may have a concave portion on the inner surface, and the concave portion may have a size, a shape, and/or a direction that changes in the radial direction of the cylinder.

In addition, the cylinder liner described above may also be configured such that the recess is filled with a material different in color from the body.

The cylinder liner may have such a pattern at a plurality of positions in the circumferential direction of the cylinder.

The cylinder liner may have such a pattern at a plurality of positions in the piston moving direction.

In addition, the cylinder liner described above may also be configured to have a different pattern at each of the plurality of locations.

Effects of the invention

According to the invention, a maintenance person can obtain a clear image of the inner side surface of the cylinder liner without opening the cylinder cover or entering the cylinder. As a result, the maintenance worker can easily and accurately evaluate the wear state of the cylinder liner.

Drawings

Fig. 1 is a schematic view of the overall structure of a cylinder liner inspection system according to an embodiment.

Fig. 2 is a schematic diagram of a terminal device and an image pickup apparatus provided in an embodiment, and apparatuses related to these apparatuses.

Fig. 3 is a schematic diagram of a basic structure of an image capturing apparatus according to an embodiment.

FIG. 4 is a schematic diagram illustrating a location of a recess included in a cylinder liner according to an embodiment.

FIG. 5 is a schematic view of a recess included in a cylinder liner according to an embodiment.

Fig. 6 is a schematic diagram of an image captured by the image capturing apparatus according to an embodiment.

Fig. 7 is a schematic diagram of a basic structure of a computer used as hardware of a terminal device according to an embodiment.

Fig. 8 is a schematic diagram of a basic structure of a computer used as hardware of a server apparatus according to an embodiment.

Fig. 9 is a functional structure diagram of a terminal device according to an embodiment.

Fig. 10 is a schematic diagram of a data structure of a wear-out calculation database stored in the terminal device according to an embodiment.

Fig. 11 is a schematic diagram of a data structure of an engine attribute database stored in a terminal device according to an embodiment.

Fig. 12 is a schematic diagram illustrating a data structure of the weather marine elephant database stored in the terminal device according to an embodiment.

Fig. 13 is a schematic diagram illustrating a data structure of a navigation schedule stored in a terminal device according to an embodiment.

Fig. 14 is a functional structure diagram of a server device according to an embodiment.

Fig. 15 is a schematic diagram of a warning screen displayed by a terminal device according to an embodiment.

Fig. 16 is a schematic diagram of an image viewing screen displayed by the terminal device according to the embodiment.

Fig. 17 is a schematic diagram of an image viewing screen displayed by the terminal device according to the embodiment.

Fig. 18 is a schematic diagram of a duration change viewing screen displayed by a terminal device according to an embodiment.

Fig. 19 is a schematic diagram of an uneven wear confirmation screen displayed on the terminal device according to an embodiment.

Fig. 20 is an external view schematically showing an image pickup apparatus according to a modification.

Fig. 21 is a schematic view showing a position of a concave portion included in a cylinder liner according to a modification.

Fig. 22 is a schematic view showing a state where a holding tool according to a modification is placed on the upper surface of the piston.

Fig. 23 is a schematic view showing a state in which a holding jig according to a modification is attached to an upper surface of a piston.

Fig. 24 is a schematic view of a duration change viewing screen displayed by a terminal device according to a modification.

Fig. 25 is a diagram illustrating a data structure of a maintenance job database stored in a terminal device according to a modification.

Fig. 26 is a schematic diagram showing a data structure of a usage fuel oil database stored in a terminal device according to a modification.

Fig. 27 is a schematic view of a screen displayed by a terminal device according to a modification.

Fig. 28 is a schematic view of a screen displayed by the terminal device according to a modification.

Fig. 29 is a schematic view of a screen displayed by a terminal device according to a modification.

Description of the main elements

Detailed Description

1. Structure of the product

Fig. 1 is a schematic view of the overall structure of a cylinder liner inspection system 1 provided in the present embodiment. The cylinder liner inspection system 1 is a system for assisting in inspecting a cylinder liner that covers an inner surface of a cylinder of an engine provided on a ship.

The cylinder liner inspection system 1 includes a terminal device 11 disposed on the ship 5, a server device 12 for data communication with the terminal device 11 via the communication satellite 6, and a server device 13 for providing weather marine meteorological data representing weather or marine meteorological phenomena encountered by the ship 5 during a voyage to the server device 12. Although the ship 5 and the terminal equipment 11 shown in fig. 1 are one each, the number of ships 5 and terminal equipment 11 is not limited to one.

The ship 5 is equipped with an imaging device 14 constituting the cylinder liner inspection system 1 in addition to the terminal device 11. Fig. 2 is a schematic diagram of a terminal device 11 and an imaging device 14 provided in the ship 5, and devices related to these devices.

The vessel 5 includes one or more engines (not shown). The engine generally has a plurality of cylinders 51, and fig. 2 illustrates one of the plurality of cylinders 51. The top of the cylinder 51 is open and is normally covered with a cylinder cover 52. Most of the inner side surface of the cylinder 51 is covered with a cylinder liner 53. The piston 54 is housed in the cylinder 51, and the piston 54 reciprocates in the cylinder 51 in accordance with the operation of the engine. Hereinafter, the moving direction of the piston 54 is simply referred to as "moving direction". In addition, the circumferential direction of the cylinder 51 or the cylinder head 52 is simply referred to as "circumferential direction".

The cylinder liner 53 improves the sliding property of the piston 54 during reciprocation, and functions to promote cooling by conducting heat of the engine, and to improve the airtightness of the cylinder 51. Although the inner side surface of the cylinder liner 53 is worn along with the reciprocation of the piston 54, the life of the engine can be extended by replacement.

The cylinder 51 is provided with a plurality of scavenging ports 511 arranged, for example, in the circumferential direction and penetrating the side surface of the piston 54. As shown in fig. 2, the scavenging port 511 is provided at a position near the bottom of the cylinder 51. However, when the piston 54 moves to the bottommost portion within the cylinder 51, the scavenging port 511 is located at a position on the upper side than the upper surface (e.g., the head top surface) of the piston 54. Hereinafter, the position of the piston 54 shown in fig. 2 is referred to as "basic position". In the present application, the upper and lower sides of the cylinder 51 and the piston 54 are referred to as the ignition surface side.

As shown in fig. 2, the image pickup device 14 is configured to be placeable on the upper surface of the piston 54 by the holding fixture 7. Fig. 3 is a schematic diagram of the basic configuration of the image pickup device 14. The imaging device 14 includes an imaging unit 141 for imaging, a light emitting unit 142 for emitting light to a subject during imaging, a control unit 143 for controlling the imaging by the imaging unit 141 and the light emission by the light emitting unit 142, a receiving unit 144 for receiving command data concerning an imaging command from an external device, a storage unit 145 for storing image data representing an imaged image, and a transmitting unit 146 for transmitting the image data to the external device.

The imaging unit 141 generates image data representing a seamless panoramic image covering the entire area of the hemisphere by one shot. That is, when the image pickup device 14 is attached in the direction shown in fig. 2, the imaging area of the imaging section 141 is the entire area above the upper surface of the piston 54.

The receiving section 144 receives instruction data from the terminal apparatus 11 via, for example, a wireless access point (not shown), and transmits the instruction data to the control section 143. The control unit 143 causes the imaging unit 141 to perform imaging based on the instruction data, and causes the light emitting unit 142 to perform light irradiation. The cylinder liner inspection system 1 is usually accompanied by light irradiation of the light emitting portion 142 at the time of photographing, and therefore, the "photographing" described below refers to photographing accompanied by light irradiation of the light emitting portion 142. The image data generated by the image capturing unit 141 is stored in the storage unit 145, and at the same time, is transmitted to the terminal device 11 by the transmission unit 146.

The image taken by the imaging device 14 includes an image of the inner side surface of the cylinder liner 53 and an image of the bottom surface of the cylinder head 52, that is, an image including the fire contact surface. Hereinafter, of the image data generated by the imaging device 14, a portion representing an image of the inner side surface of the cylinder liner 53 is referred to as "cylinder liner image data", and a portion representing an image of the firing surface of the cylinder head 52 is referred to as "firing surface image data".

The holder 7 is made of, for example, rubber, and has heat resistance, heat insulation, and low thermal conductivity. The holding tool 7 has 3 or 4 or more legs to support the imaging device 14 in a state spaced from the upper surface of the piston 54. In addition, the contact area between the holding tool 7 and the piston 54 is small. Therefore, the heat of the piston 54 is hardly transferred to the image device 14. Further, since the holder 7 has high elasticity, the piston 54 and the imaging device 14 are not easily damaged even if the maintenance worker does not handle them properly. Further, the entire holder 7 does not have to be made of rubber, and for example, a metal frame coated with rubber may be used. In addition, any material having elasticity, heat resistance, heat insulation properties, and low thermal conductivity may be used as the material for the holder 7 instead of rubber.

When the maintenance personnel check the cylinder liner 53, the engine is shut off and the control of the motor is operated to move the piston 54 to the basic position. Next, the serviceman places the camera 14 on the holding fixture 7, and then inserts the camera 14 into the cylinder 51 from any one of the scavenging ports 511, for example, by using a magic hand, and places it at the center of the upper surface of the piston 54. At this time, the serviceman aligns the direction of the imaging device 14 to a predetermined direction.

Then, the serviceman operates the motor control device to reciprocate the piston 54 once in the cylinder 51. During this time, the image pickup device 14 performs image pickup based on the instruction data transmitted from the terminal apparatus 11, and transfers the generated image data to the terminal apparatus 11.

Then, the maintenance worker takes the imaging device 14 mounted on the holder 7 by using a magic handle out of the cylinder 51 through an arbitrary scavenging port 511. This makes it possible to obtain clear images of the inner surface of the cylinder liner 53 taken at a plurality of positions in the moving direction.

While the piston 54 reciprocates once, the terminal device 11 receives the image data sent from the imaging device 14 and also receives the crank angle data on the piston 54 sent from the crank angle measuring device 8. The crank angle measuring device 8 is a device that continuously measures crank angles and outputs crank angle data representing the measured crank angles. The crank angle data received by the terminal device 11 is used to generate position data indicating the position of the imaging means 14 in the moving direction.

The ship 5 is provided with a measuring device for measuring various properties during the course of the ship 5, in addition to the crank angle measuring device 8. Hereinafter, as shown in fig. 2, a set of these measuring devices is referred to as a measuring device group 9. The measurement device group 9 includes: engine property measuring means for measuring properties that affect the wear of the cylinder liner 53, such as engine revolution number measuring means 91 and engine load measuring means 92; meteorological sea-image related attribute measuring devices, such as a wind speed and direction measuring device 93 and a tide speed and direction measuring device 94; ship speed-related attribute measuring devices, such as a ground ship speed measuring device 95 and a water ship speed measuring device 96. The measuring devices included in the measuring device group 9 transmit attribute data indicating the measured attributes to the terminal device 11. The various attribute data received by the terminal device 11 is used to estimate the degree of wear and the like of the cylinder liner 53.

The cylinder liner inspection system 1 has a function of determining the degree of wear of the cylinder liner 53 using image data generated by the imaging device 14. In order to determine the degree of wear using image data, the cylinder liner 53 of the present embodiment is provided with a plurality of concave portions 531 on the inner surface thereof, and the shape of the concave portions 531 is conical with the radial direction of the cylinder liner 53 as the rotation axis. Fig. 4 is a diagram in which the position of the concave portion 531 provided in the cylinder liner 53 is indicated by "O".

In the example shown in fig. 4, the cylinder liner 53 is provided with concave portions 531 at intersections of 4 straight lines provided along the moving direction at positions spaced apart by 90 degrees in the circumferential direction and 6 lines (circles) provided at equal intervals in the moving direction and wound in one turn in the circumferential direction. However, the number and the interval of the concave portions 531 are not limited to the example shown in fig. 4, and may be appropriately determined according to the size of the cylinder liner 53 and the like.

As shown in fig. 5, each concave portion 531 has a conical shape, and the diameter thereof gradually decreases from the inner surface to the outer surface of the cylinder liner 53. So that the diameter of the opening portion of the concave portion 531 becomes smaller as the cylinder liner 53 is worn. Therefore, from the diameter of the image of the concave portion 531 indicated by the image data generated by the imaging device 14, the degree of wear of the cylinder liner 53 can be easily and accurately determined.

Fig. 6 is a schematic diagram of an image of the cylinder liner 53 captured by the imaging device 14, in which an area (image-clear area) adjacent to the upper surface of the piston 54 at the time of capturing is cut into a band shape and an image of the spark surface is cut out. Fig. 6(a) shows an image taken by the imaging device 14 near the bottom of the cylinder 51, fig. 6(b) shows an image taken by the imaging device 14 near the midriff part of the cylinder 51, and fig. 6(c) shows an image taken by the imaging device 14 near the top of the cylinder 51. As shown in fig. 6, the closer the imaging device is to the top of the cylinder 51, the larger the image of the fire contact surface.

The hardware structure of the terminal device 11 is, for example, a general terminal device computer. Fig. 7 is a schematic diagram of the basic configuration of the computer 10 employed as the hardware of the terminal device 11. The computer 10 includes a memory 101 for storing various data, a processor 102 for executing various data processing according to a program stored in the memory 101, a communication IF103 which is an IF (interface) for performing data communication with other devices, a display device 104 such as a liquid crystal display for displaying images to a user, and an operation device 105 such as a keyboard for receiving an operation by the user. In addition, an external display device connected to the computer 10 may be used instead of or in addition to the display device 104 built in the computer 10. In addition, an external operation device connected to the computer 10 may be used instead of or in addition to the operation device 105 built in the computer 10.

The hardware structure of the server device 12 and the server device 13 is, for example, a general server device computer. Fig. 8 is a schematic diagram of a basic configuration of a computer 20 used as hardware of the

server devices

12 and 13. The computer 20 includes a memory 201 for storing various data, a processor 202 that performs various data processing according to a program stored in the memory 201, and a communication IF203 that performs data communication with other devices.

Fig. 9 is a functional configuration diagram of the terminal device 11. That is, the computer 10 performs data processing with a program according to the terminal device 11, thereby functioning as an apparatus including the configuration shown in fig. 9. The functional configuration of the terminal device 11 will be explained below.

The time counting means 110 generates time data indicating the current time. The position data acquisition device 111 receives the crank angle data from the crank angle measurement device 8, and generates position data indicating the position of the imaging device 14 in the moving direction using the crank angle data.

The position data acquiring device 111 determines the position of the imaging device 14 in the moving direction corresponding to the crank angle, that is, the position of the upper surface of the piston 54, using a predetermined calculation formula having the crank angle represented by the crank angle data as a variable or a conversion table. That is, the position of the imaging device 14 is uniquely determined according to the crank angle, and therefore the crank angle data can be directly used as the position data.

When the position data acquired by the position data acquiring device 111 indicates a predetermined position, the command device 112 transmits command data to the image pickup device 14 to take an image. If the portions of the image taken by the image pickup device 14 where the cylinder liner 53 is clearly taken are cut into a belt shape and connected in order with distortion corrected, among these positions, the position of the image pickup device 14 at which the command device 112 sends command data is predetermined as a position covering the entire area of the cylinder liner 53. The image data acquisition device 113 receives the image data transmitted by the image pickup device 14.

The attribute data acquisition device 114 receives attribute data transmitted from each measurement device of the measurement device group 9. In addition, the attribute data acquisition device 114 acquires attribute data input by a serviceman and receives the attribute data transmitted by the server device 12. The attribute data input by the serviceman is data indicating that the attributes measured by the measuring device group 9 are not included in the voyage attributes of the ship 5, and is, for example, the type of fuel oil used by the engine. The attribute data transmitted from the server device 12 is, for example, meteorological marine image data indicating weather or marine images that the ship 5 is likely to encounter during future voyages.

The wear determining device 115 determines the degree of wear of the cylinder liner 53 using the image data acquired by the image data acquiring device 113, and generates wear data representing the determined degree of wear. In the present embodiment, the thickness (μm) of the cylinder liner 53 worn from the initial state is used as an index indicating the degree of wear of the cylinder liner 53. Hereinafter, this thickness is referred to as "wear amount". In addition, regarding the index indicating the degree of wear of the cylinder liner 53, the thickness of the cylinder liner 53 worn from the initial state is merely an example, and various other indexes may be used as the index indicating the degree of wear of the cylinder liner 53. For example, other indices such as the material weight per unit area of wear of the inner side of the cylinder liner 53 (g/m), the amount of wear per unit load (μm/kw), the amount of wear per unit time of flight (μm/h), and the like may be used as indices indicating the degree of wear of the cylinder liner 53.

The transmitting means 116 transmits the attribute data acquired by the attribute data acquiring means 114 and the wear data generated by the wear determining means 115 to the server apparatus 12. The relationship data acquisition means 117 receives relationship data indicating a relationship between the navigation-related attribute of the ship 5 and the wear amount of the cylinder liner 53 from the server device 12.

The wear estimating device 118 estimates the wear amount of the cylinder liner 53 using the attribute data acquired by the attribute data acquiring device 114 and the relationship data acquired by the relationship data acquiring device 117, and generates estimated wear data representing the estimated wear amount (hereinafter referred to as "estimated wear amount").

Regarding the cylinder liner 53 at some times, when the difference between the estimated wear amount represented by the estimated wear data generated by the wear estimating device 118 and the wear amount represented by the wear data generated by the wear determining device 115 satisfies a predetermined condition, the notification device 119 sends a predetermined notification to a serviceman or the like.

The storage 120 stores various data as described below. Fig. 10 is a schematic diagram of a data structure of the wear management database stored in the storage device 120. The wear management database is a database that mainly manages the amount of wear, which is determined from the image captured by the imaging device 14.

The wear management database includes a data table relating to each cylinder 51 of the engine provided on the ship 5. The data tables of the wear management database are sets of data records relating to each image captured by the camera 14. The data table of the wear management database has: a field [ shooting time ] (hereinafter, a name given [ ] indicates a data field name) for storing time data indicating an image shooting time; [ shooting position ] for storing position data indicating a shooting position in the moving direction; [ image ] for storing image data; a [ wear amount ] for storing wear data representing a wear amount of the cylinder liner 53 determined from the image; [ estimated wear amount ] for storing estimated wear data representing the estimated wear amount at the image capturing time.

The [ wear amount ] and the [ estimated wear amount ] have data fields [ first direction ], [ second direction ], …, and [ nth direction ] of the lower layer, respectively. However, "n" indicates the number of the concave portions 531 in the circumferential direction (refer to fig. 4), and in the example shown in fig. 4, n is 4. The [ first direction ], [ second direction ], …, and [ nth direction ] correspond to the n recesses 531 in the circumferential direction of the cylinder liner 53, respectively. The [ first direction ], [ second direction ], …, and [ nth direction ] of the lower layer of [ wear amount ] are used to store wear data indicating the wear amount determined according to the image size of the corresponding concave portion 531. The [ first direction ], [ second direction ], …, and [ nth direction ] of the lower layer of the [ estimated wear amount ] are used to store estimated wear data representing an estimated wear amount calculated using the property data and the relationship data relating to the voyage after the last shooting time, with the wear amount determined by the image of the concave portion 531 shot at the same shooting position with the shooting time (hereinafter, referred to as "last shooting time") previous to the image shooting time of its data record as a reference.

Fig. 11 is a schematic diagram of the data structure of the engine attribute database stored in the storage device 120. The engine attribute database is a database for managing attribute data indicating attributes relating to past operations of the engine.

The engine attribute database includes a data table relating to each engine equipped on the ship 5. The data tables contained in the engine property database are sets of data records corresponding to each measurement period. The data table of the engine attribute database includes [ measurement period ], [ number of engine revolutions ], [ engine load ], [ intake air temperature ], [ exhaust gas temperature ], [ cylinder fuel injection amount ], and the like.

Fig. 12 is a schematic diagram of the data structure of the weather marine elephant database stored in the storage device 120. The weather marine image database is a database for managing weather or marine images encountered by the ship 5 in the past and weather or marine image-related attribute data that the ship 5 is likely to encounter in the future.

The weather-sea elephant database contains data records corresponding to each measurement period with respect to past weather or sea elephants, and the weather-sea elephant database contains data records corresponding to each prediction period with respect to future weather or sea elephants. The data records contained in the weather and weather-marine vessel database about future weather or marine vessels are updated on the basis of the new weather and marine vessel data received by the terminal device 11 from the server device 13 via the server device 12, and the data records during the past prediction period are deleted.

Each data record of the meteorological weather database has [ measurement period ] and [ wind speed ], [ wind direction ], [ tidal speed ], [ tidal direction ], [ sea wave height ], etc. for storing data representing a measurement period or a prediction period.

The engine attribute database and the meteorological marine database described above are examples of the databases for managing the attribute data stored in the storage device 120. The storage 120 may also store, for example, a database for managing repair (trim) -related attribute data, a database for managing watercraft speed-related attribute data, and the like.

Fig. 13 is a schematic diagram of the data structure of the navigation schedule stored in the storage device 120. The voyage schedule stores data representing future voyage plans of the ship 5. The navigation schedule includes: a port/voyage section for storing data indicating a port or voyage section at which the ship 5 is stopped; [ period ] for storing data indicating a period during which the ship 5 is parked at a port or sails in a voyage.

Fig. 14 is a functional configuration diagram of the server device 12. That is, the computer 20 executes data processing in accordance with the program for the server apparatus 12, and functions as an apparatus having the configuration shown in fig. 14. Hereinafter, a functional configuration of the server device 12 will be explained.

The attribute data acquisition device 121 receives attribute data indicating an attribute of a voyage of the ship 5 performed in the past from the terminal device 11. When the ship 5 is plural, the attribute data acquisition means 121 receives the attribute data from the terminal device 11 provided on each of these plural ships 5.

The wear data acquisition means 122 receives the wear data from the terminal device 11. The relationship data generation means 123 generates relationship data representing the relationship between the attribute and the wear amount using the attribute data acquired by the attribute data acquisition means 121 and the wear data acquired by the wear data acquisition means 122. For example, the relational data generation means 123 obtains a relational expression having the wear amount as a target variable and various attributes as explanatory variables by known regression analysis using the attribute data and the wear data, and generates relational data representing the obtained relational expression. In addition, in the generation of the relationship data, in addition to the attribute data and the wear data on the target vessel 5, the attribute data and the wear data on the different vessel 5 of the same type as the target vessel 5 may be used.

The storage device 124 stores various data as described below. First, the storage device 124 stores a database for managing the attribute data acquired by the attribute data acquisition device 121. The database for managing the attribute data stored in the storage device 124 and the engine attribute database (refer to fig. 11) and the weather-marine database (refer to fig. 12) stored in the storage device 120 of the terminal device 11 are exemplified. In addition, the storage device 124 stores a database mainly for managing the wear data acquired by the wear data acquisition device 122. The database for managing wear data stored in the storage device 124 is the same as the wear management database (refer to fig. 10) stored in the storage device 120 of the terminal device 11. If there are multiple vessels 5, the databases stored in the storage device 124 manage data about the multiple vessels 5.

In addition, the storage device 124 stores a copy of the navigation schedule (refer to fig. 13) stored in the storage device 120 of the terminal apparatus 11. If there are a plurality of ships 5, the storage device 124 stores a copy of the voyage schedule for these plurality of ships 5.

The requesting device 125 requests the server device 13 for weather marine vessel data indicating weather or marine vessels that the ship 5 is likely to encounter during future voyages, based on the copy of the voyage schedule stored in the storage device 124. The weather marine vessel data acquiring means 126 receives the weather marine vessel data transmitted from the server apparatus 13 in response to the request from the requesting means 125.

The transmitting means 127 transmits the relationship data generated by the relationship data generating means 123 to the terminal device 11. Further, the transmitting means 127 transmits the weather marine meteorological data acquired by the weather marine meteorological data acquiring means 126 to the terminal device 11.

The functional configuration of the server device 13 is the same as that of a general server device that transmits data to a requester in response to a request, and therefore, the description thereof is omitted.

Next, the operation of the cylinder liner inspection system 1 will be described. First, in the cylinder liner inspection system 1, the terminal device 11 continuously updates databases for managing the attribute data, such as an engine attribute database (refer to fig. 11) and a meteorological seascape database (refer to fig. 12), on the basis of the attribute data received from the measuring device group 9. In addition, the terminal device 11 continuously updates the voyage schedule according to the current time and the change in the current position of the ship 5 (refer to fig. 13). The terminal device 11 may update the databases and tables according to data input operations by a serviceman or the like.

The terminal device 11 transmits the stored attribute data, wear data, and the like to the server device 12 at a predetermined frequency, for example. The server apparatus 12 updates the stored database based on these data transmitted by the terminal device 11. The server device 12 generates relational data using the stored attribute data and wear data at a predetermined frequency, for example, and transmits the relational data to the terminal device 11. As a result, the terminal device 11 can periodically obtain updated relationship data.

The maintenance worker performs work at an appropriate frequency using the time when the engine is stopped so as to take an image of the cylinder liner 53. Specifically, the serviceman operates the control device of the motor to move the piston 54 to the basic position, and places the imaging device 14 provided on the holding fixture 7 on the upper surface of the piston 54. Then, the serviceman operates the motor control device to reciprocate the piston 54 once in the cylinder 51.

In the process in which the piston 54 reciprocates once in the cylinder 51, the terminal apparatus 11 transmits instruction data to the imaging device 14 every time the position of the imaging device 14 reaches a predetermined position in the moving direction of the cylinder liner 53. The imaging device 14 performs imaging based on the instruction data, and transmits the generated image data to the terminal apparatus 11.

The terminal apparatus 11 receives image data from the camera 14 and stores it in the wear management database (refer to fig. 10). The terminal device 11 generates wear data from the image size of the concave portion 531 in the image represented by the received image data, and stores the wear data in the wear management database.

When new wear data is generated, the terminal device 11 substitutes the wear amount at the last shooting time and the attribute indicated by the attribute data associated with the period from the last shooting time to the present time into the relational expression indicated by the relational data, and calculates the estimated wear amount. The terminal device 11 stores estimated wear data, which indicates the calculated estimated amount of wear, in a wear management database.

The terminal device 11 detects the possibility of abnormal wear based on whether or not the difference between the estimated wear amount represented by the newly generated estimated wear data and the wear amount represented by the wear data stored in the same data record satisfies a predetermined condition. Hereinafter, whether or not a value obtained by dividing the difference between the wear amount and the estimated wear amount by the integral value of the total number of rotations of the engine up to the present from the previous shooting time is smaller than a predetermined threshold value is set as a predetermined condition used when the terminal device 11 detects the possibility of abnormal wear. However, this condition is only an example, and other conditions may be adopted, such as whether or not the difference between the wear amount and the estimated wear amount is smaller than a predetermined threshold value, whether or not a value obtained by dividing the difference by the integrated value of the previous imaging time and the current travel distance is smaller than a predetermined threshold value, and the like.

When the terminal device 11 detects the possibility of abnormal wear with respect to any one of the cylinder liners 53, a screen (hereinafter, referred to as "warning screen") as shown in fig. 15 is displayed, thereby notifying the maintenance personnel. When the serviceman operates the "image viewing" button of the warning screen, the terminal apparatus 11 displays a screen (hereinafter, referred to as "image viewing screen") as shown in fig. 16. The image viewing screen displays the latest image of the cylinder liner 53 in which the possibility of abnormal wear is detected and the image captured last time in parallel. In the front view and the plan view of the cylinder liner 53 shown in the area a01 of the image viewing screen, the portion of the entire area of the cylinder liner 53 which is currently displayed on the image viewing screen is indicated by a color, and the portion at which the possibility of abnormal wear is detected is indicated by a mark.

The maintenance person can easily confirm the past and present states of the inner surface of the cylinder liner 53, for which the possibility of abnormal wear has been detected, on the image viewing screen. Further, the serviceman may operate the terminal device 11 to display the other portion of the cylinder liner 53, enlarge or reduce the image, and redisplay the past image. The image viewing screen is not displayed only by operating the "image viewing" button of the warning screen, but also displayed when a predetermined operation is performed on the terminal device 11.

The serviceman can cause the terminal device 11 to display images of the past and present ignition faces by operating the "ignition face" button of the image viewing screen. Fig. 17 is a schematic diagram showing an image of the flame contact surface on the image viewing screen. An exhaust valve, a fuel valve and the like are arranged on the fire touching surface. Therefore, the maintenance person can confirm the states of the exhaust valve, the fuel valve, and the like on the image viewing screen shown in fig. 17, and can determine the appropriate maintenance timing of these devices. In addition, a deposit of carbon called carbon powder is often attached to the vicinity of the tip of the fuel valve. The carbon powder is generated due to incomplete combustion of fuel. Therefore, the maintenance person can confirm the state of the carbon powder and acquire information on the combustion state of the fuel through the image viewing screen shown in fig. 17.

In addition, the serviceman can cause the terminal apparatus 11 to display a screen (hereinafter, referred to as "change-over-time viewing screen") as shown in fig. 18 by operating the "change-over-time viewing" button of the image viewing screen. The aging view screen graphically represents the aging of the past wear amount and the future estimated wear amount of the target portion of the cylinder liner 53. When navigating according to the navigation schedule during the navigation schedule shown in the navigation schedule, the terminal device 11 calculates an estimated wear amount using the relationship data and the future attribute data, and displays the estimated wear amount in the graph of the duration change review screen. When a navigation is performed in a similar mode to the past, for example, for a period in which the navigation schedule is not determined, the terminal device 11 calculates an estimated wear amount using the relationship data and the past attribute data, and displays the calculated wear amount on a graph of the time-varying review screen. The maintenance person can easily know the ideal replacement time of the cylinder liner 53 by viewing the graph of the screen with time.

In addition, the serviceman can cause the terminal apparatus 11 to display a screen as shown in fig. 19 (hereinafter, referred to as "uneven wear confirmation screen") by operating the "uneven wear confirmation" button of the image viewing screen. In the uneven wear confirmation screen, changes in the wear amount in the moving direction with respect to each imaging direction are represented by a graph. The maintenance person can easily know the degree of uneven wear of the cylinder liner 53 through the graph of the uneven wear confirmation screen.

As described above, according to the cylinder liner inspection system 1, the maintenance person can easily correctly evaluate the wear state of the cylinder liner 53.

Further, according to the cylinder liner inspection system 1, the maintenance worker can easily confirm the states of the exhaust valve, the fuel valve, and the like provided on the fire contact surface. In addition, according to the cylinder liner inspection system 1, the maintenance worker can confirm the state of the carbon powder adhering to the ignition face. The carbon powder tends to fall off when the fuel valve is replaced or the cylinder head is opened, and thus it is difficult to confirm the state thereof before. According to the cylinder liner inspection system 1, it is possible to confirm the state of the toner, which has been difficult to confirm before, which is a point of concern.

(modification)

The above-described embodiments may be variously modified within the scope of the technical idea of the present invention. These modifications are described below. In addition, 2 or more modifications below may be combined.

(1) In the above embodiment, the imaging device 14 includes the photographing section 141 that photographs a panoramic image of the entire area of the hemisphere without seams. Instead of this, the imaging device 14 may include a plurality of imaging units 141, and an image covering a 360-degree imaging area in the circumferential direction of the cylinder liner 53 may be generated by combining images captured by the plurality of imaging units 141. Fig. 20 is an external view schematically showing the imaging device 14 according to this modification. In addition, the arrows shown in fig. 20 indicate the shooting direction. The imaging device 14 shown in fig. 20 includes 5 imaging units 141, and the angle of view of these imaging units 141 in the horizontal direction is about 100 degrees. 4 of the photographing sections 141 are radially arranged, and photographing directions of the photographing sections 141 are spaced apart by 90 degrees. The remaining one of the photographing sections 141 is disposed with its photographing direction vertically upward. The images simultaneously captured by the 4 imaging units arranged in the radial direction are combined by the control unit 143 to generate cylinder liner image data. In addition, the photographing section 141 with the photographing direction vertically upward generates image data of a fire surface.

(2) In the above embodiment, the imaging device 14 performs imaging in accordance with the instruction data transmitted from the terminal apparatus 11. Instead, the imaging device 14 may perform imaging every time a predetermined time elapses. In this modification, the imaging device 14 does not receive the instruction data when performing imaging, and transmits the generated image data to the terminal apparatus 11. The terminal apparatus 11 receives image data from the imaging device 14, and stores position data generated while receiving the image data in a wear management database in correspondence with the image data.

(3) In the above embodiment, the position data acquisition means 111 of the terminal device 11 generates the position data by using the crank angle. The method of generating the position data by the position data acquiring device 111 is not limited to this.

For example, it is also possible to adopt a configuration in which the position data acquiring device 111 generates position data according to the distance between the upper surface of the piston 54 and the firing surface of the cylinder head 52. In this case, the cylinder liner inspection system 1 includes a distance measuring device configured to be disposed on the upper surface of the piston 54 for measuring the distance between the upper surface of the piston 54 and the ignition face of the cylinder head 52 and generating movement direction distance data representing the measured distance. The position data acquisition means 111 generates position data using the moving direction distance data generated by the distance measurement means. Further, the imaging device 14 may include a distance measuring device.

Further, the position data acquiring device 111 may be configured to generate the position data based on the air pressure in the piston 54. In this case, the cylinder liner inspection system 1 includes a gas pressure measuring device provided on the upper surface of the piston 54 for measuring the gas pressure inside the piston 54 and generating gas pressure data representing the measured gas pressure. The position data obtaining means 111 generates position data using the air pressure data generated by the air pressure measuring means.

Further, a configuration may be adopted in which the position data acquisition device 111 generates position data using the firing surface image data. In this case, the position data acquiring means 111 specifies the position of the imaging device 14 in the moving direction from the image size of the fire surface indicated by the fire surface image data, and generates position data indicating the specified position.

Further, a configuration may be adopted in which the position data acquiring device 111 generates position data using the cylinder liner image data. In this case, the shape of the concave portion 531 provided in the cylinder liner 53 is not limited to a cone, and may be a triangular cone, a quadrangular cone, or the like, or a cone section may be a star shape, an arrow shape, or the like, and the concave portion 531 of different shapes is provided depending on the position in the moving direction. The position data acquiring device 111 specifies the position of the imaging device 14 in the moving direction from the shape, direction, and the like of the image of the concave portion 531 indicated by the cylinder liner image data, and generates position data indicating the specified position.

(4) In the above-described embodiment, the pairing of the image data generated by the imaging device 14 and the position data acquired by the position data acquisition device 111 is performed by the terminal apparatus 11. Instead, the image data and the position data may be paired by the imaging device 14. In this case, the imaging device 14 includes the position data acquisition device 111, and the image data generated by the imaging unit 141 and the position data acquired by the position data acquisition device 111 are paired and transmitted to the terminal device 11.

(5) In the above embodiment, it is assumed that the camera 14 is disposed in the correct direction on the upper surface of the piston 54. That is, when the imaging device 14 is set in the wrong direction, it is not clear which part of the image represented by the cylinder liner image data represents which part of the actual cylinder liner 53. Therefore, it is also possible to adopt a configuration in which the cylinder liner inspection system 1 includes direction data acquisition means for acquiring direction data indicating the shooting direction of the image pickup device 14.

For example, a configuration may also be adopted in which the direction data acquisition means generates the direction data using the image data of the fire-strike face. In this case, the direction data acquiring means generates the direction data based on the position of the image of the member such as the fuel valve in the flame front image represented by the flame front image data.

Further, a configuration may be adopted in which the direction data acquiring means generates the direction data using the cylinder liner image data. In this case, the sectional shape, direction, and the like of the concave portion 531 provided on the cylinder liner 53 are changed corresponding to the circumferential direction. The direction data acquisition means specifies the shooting direction from the shape, direction, and the like of the image of the concave portion 531 indicated by the cylinder liner image data, and generates direction data indicating the specified direction.

Further, the holder 7 may be provided with characters, symbols, or figures indicating the shooting direction. That is, when the imaging device 14 is provided on the holder 7, characters, symbols, or figures indicating the imaging direction are provided at appropriate positions on the holder 7 in order to capture the characters, symbols, or figures indicating the imaging direction in the imaging area of the imaging device 14. In this case, only when the holding fixture 7 is placed in the correct orientation on the upper surface of the piston 54, the shooting direction can be determined from the characters of the photographed image or the like.

(6) A configuration may also be adopted in which the cylinder liner inspection system 1 includes a correction device that corrects distortion of the cylinder liner image data. For example, when the imaging device 14 is provided at a position where the upper surface of the piston 54 is off-center, the image of the cylinder liner 53 captured by the imaging device 14 becomes uneven in scale due to the position in the circumferential direction. The correction device corrects the cylinder liner image data so as to uniformize the uneven scale.

For example, the imaging device 14 measures the imaging distance in each of the plurality of imaging directions, that is, the distance from the imaging section 141 to the inner side surface of the cylinder liner 53, and generates imaging distance data indicating the measured distance. The correction means corrects the cylinder liner image data using the shooting distance data generated by the imaging means 14.

Further, a configuration may also be adopted in which the correction device corrects the cylinder liner image data using the spark surface image data. In this case, the correction means determines the distortion of the image represented by the cylinder liner image data based on the distortion of the fire contact surface image represented by the fire contact surface image data, and corrects the cylinder liner image data in order to eliminate the determined distortion.

(7) In the above-described embodiment, the server device 12 generates the relationship data indicating the relationship between the attribute and the wear amount based on the factor analysis. The method of generating the relational data is not limited to the factor analysis. For example, in the generation of the relational data, the relationship between the integral value of the number of engine revolutions multiplied by a weight (weight) corresponding to the engine load and the wear amount may be approximated by another method such as approximation.

(8) The concave portion 531 provided on the cylinder liner 53 may also be filled with a material (hereinafter, referred to as "filling material") having a color different from that of the material of the cylinder liner 53. In this case, after the formation of the cylinder liner 53 including the concave portion 531 is completed, the concave portion 531 is filled with a filler. Next, the inner surface of the cylinder liner 5 in which the concave portion 531 is filled with the filler is polished. By these steps, the unevenness of the inner surface is reduced, and the cylinder liner 53 having high sliding property and high airtightness can be obtained.

In the modification in which cylinder liner image data is used to determine the position of the imaging device 14 in the moving direction, a filler of a different color may be used in the moving direction. In this case, even if the sectional shape and direction of the concave portion 531 in the moving direction are the same, the position of the imaging device 14 in the moving direction can be determined by the color of the filler.

In the modification in which the cylinder liner image data is used to determine the imaging direction, the filler of different colors may be used in the circumferential direction. In this case, even if the sectional shape and direction of the concave portion 531 in the circumferential direction are the same, the shooting direction can be determined by the color of the filler.

(9) The shape of the concave portion 531 provided on the cylinder liner 53 is not limited to a tapered shape, and any shape may be used as long as at least one of the size, shape, and direction of the cross section thereof can be changed as the progress of wear. In addition, in the modification in which the concave portion 531 is filled with the filler, a configuration may be adopted in which the color of the filler is changed as the progress of wear by stacking a plurality of fillers of different colors. In this case, the cross section of the concave portion 531 does not necessarily have to be changed as the wear progresses. The structure of the cylinder liner 53 is not limited as long as a pattern is formed on the inner side surface of the cylinder liner 53 and at least one of the size, shape, and direction of the pattern may be changed as the wear progresses, if necessary.

(10) In the above embodiment, the plurality of concave portions 531 are provided at the intersections of a plurality of straight lines extending in the moving direction and a plurality of circles circling around the circumferential direction, with respect to the concave portions 531 provided on the cylinder liner 53. The layout of the concave portion 531 provided on the cylinder liner 53 is not limited to this. For example, only one concave portion 531 may be provided on the representative point. In addition, a plurality of concave portions 531 may be provided side by side so that these concave portions 531 draw a spiral on the inner side surface of the cylinder liner 53. In addition, a groove-like recess 531 may also be employed. Fig. 21 is a schematic view of the position of the recess 531 on the cylinder liner 53 including the groove-like recess 531. For example, as shown in fig. 21(a), a plurality of concave portions 531 extending in the moving direction are provided on the inner side surface of the cylinder liner 53. For example, as shown in fig. 21(b), a plurality of concave portions 531 are provided on the inner side surface of the cylinder liner 53 so as to make one turn in the circumferential direction. When the cross section of the cut groove-like recess 531 is perpendicular to the extending direction of the groove-like recess 531, the cross section is, for example, V-shaped.

(11) In the above embodiment, the holding fixture 7 has a plurality of legs, the front ends of which are in contact with the upper surface of the piston 54. Instead, the shape of the contact surface of the holding tool 7 and the shape of the upper surface of the piston 54 may be configured so as to engage with each other. Fig. 22 is a schematic view of a state in which the holder 7 having a contact surface that engages with the irregularities of the upper surface is placed on the upper surface of the piston 54 having the irregularities. With this modification, the serviceman can easily place the camera 14 on a specific position on the upper surface of the piston 54.

(12) Sometimes a screw hole is provided on the upper surface of the piston 54 for extracting the piston 54 from the cylinder 51. When the upper surface of the piston 54 has a recess such as a screw hole, the holder 7 may have a rod-like body inserted into the recess. Fig. 23 is a schematic view of the state in which the holding tool 7 according to this modification is attached to the upper surface of the piston 54. In this modification, even if, for example, the axis of the cylinder 51 is inclined with respect to the vertical direction, the imaging device 14 is not displaced from a specific position on the upper surface of the piston 54. The rod-shaped body included in the holding tool 7 shown in fig. 23 has no screw. Instead, the holding means 7 comprises a threaded rod which can be screwed into a threaded hole provided in the upper surface of the piston 54, so that it can also be inserted into the threaded hole (recess).

(13) In the above-described embodiment, the terminal device 11 is a device that detects the possibility of abnormal wear from the difference between the estimated wear amount and the wear amount. Instead of this, or on the basis thereof, the terminal device 11 may detect the possibility of abnormal wear from the temporal change in the amount of wear. Fig. 24 is a schematic diagram of a change-over-time viewing screen displayed on the terminal device 11 according to the modification. In this modification, when the rate of change in the wear amount changes greatly, a maintenance worker or the like is notified of the possibility of abnormal wear. The rate of change in the wear amount is a value obtained by dividing the amount of change in the wear amount by the attribute of the main cause of wear. When calculating the change rate of the wear amount, the change amount of the wear amount may be divided by various values, for example, an integrated value of the number of engine revolutions (for example, multiplied by a weight (weight) corresponding to the engine load), an integrated value of the cruising distance (for example, multiplied by a weight corresponding to the engine load), an integrated value of the cruising time, and the like, and various values may be used.

(14) The method of utilizing the image captured by the image capturing device 14 is not limited to those described in the above embodiments. For example, the image captured by the imaging device 14 may be used to make it easy for a serviceman of the ship 5 to use the opinion of an expert such as a technician in an engine plant. Specifically, for example, a data field [ evaluation ] is set in a data table stored in a wear management database (refer to fig. 10) of the server apparatus 12. The server device 12 includes an evaluation data acquisition device that acquires evaluation data indicating an evaluation made by an expert regarding the state of the inner surface and the ignition surface of the cylinder liner 53 after viewing the image. The evaluation data acquired by the evaluation data acquisition means is stored in a wear management database. When the serviceman operates the terminal device 11 to specify the image of the cylinder liner 53 or the fire contact surface to be evaluated, the terminal device 11 transmits image data of the specified image to the server apparatus 12. The server device 12 stores image data indicating a predetermined similarity between the image data transmitted from the terminal devices 11, and the server device 12 includes an extraction device that extracts a data record storing evaluation data from the wear management database. The server apparatus 12 transmits the image data and evaluation data of the extracted data record to the terminal device 11. The terminal device 11 displays the contents of the image data and the evaluation data transmitted from the server apparatus 12 to the serviceman.

(15) The image captured by the imaging device 14 may show that the cylinder liner 53 is damaged (scratches, corrosion, or the like). It is also possible to adopt a configuration in which, when it is detected that the cylinder liner 53 is damaged, for example, the terminal device 11 extracts data that contributes to the determination of the cause of the abnormality and notifies maintenance personnel or the like of the ship 5.

In this modification, the attribute data acquisition device 114 of the terminal device 11 acquires, in addition to the attribute data acquired in the above-described embodiment, attribute data that contributes to specifying the cause of damage to the cylinder liner 53 and attribute data that indicates the attributes of sailing of the ship 5 performed in the past, for example, attribute data relating to maintenance work performed in the past by the ship 5 and attribute data relating to fuel oil used in the past by the ship 5. The attribute data may be data input by a serviceman of the ship 5, for example, or data generated by a device such as a control device for controlling an on-off valve for opening and closing a fuel tank for storing fuel oil to be put into the engine, for example.

The attribute data acquired by the attribute data acquisition means 114 is stored in the storage means 120. Fig. 25 is a schematic diagram of the data structure of the maintenance work database for managing the attribute data relating to the maintenance work performed by the vessel 5. The tables of the maintenance job database are sets of data records corresponding to maintenance jobs, wherein the data fields include: a date and time for storing data indicating the date and time at which the maintenance work was performed; [ device name ] and [ part name ] for storing data indicating the name of a maintenance object having a device and a part; [ maintenance job name ] for storing data indicating the name of the maintenance job.

Fig. 26 is a schematic data structure diagram of a fuel oil database for managing fuel oil-related attribute data used by the ship 5. When a plurality of engines are equipped on the ship 5, the fuel oil database is used to include a table corresponding to each engine. Fig. 26 shows a table relating to engines identified by the engine ID "01". The table using the fuel oil database is a data record set corresponding to each fuel oil continuously used by the same fuel tank, wherein the data field comprises: [ period ] for storing data indicating the period of use of the fuel oil; [ tank number ] for storing a tank number for identifying a fuel tank that contains fuel oil to be used; BDN number for storing BDN (bunker deliverynote) identifying the fuel oil used; a [ publisher name ] for storing data representing a publisher name of the BDN; [ room temperature viscosity ] for storing data indicating the room temperature viscosity (for example, kinematic viscosity at 40 to 50 degrees centigrade) of the fuel oil; [ sulfur content ] for storing data indicating the sulfur content of the fuel oil.

In this modification, for example, when a serviceman of the ship 5 visually recognizes an image of one cylinder liner 53 displayed on the terminal device 11 (fig. 6) and detects that the cylinder liner 53 is damaged, a predetermined operation is performed on the terminal device 11. The terminal device 11 includes an extraction means that extracts attribute data from various databases stored in the storage means 120 in accordance with predetermined conditions when a maintenance person performs a predetermined operation. The condition used when the extracting means extracts the attribute data is a condition for extracting attribute data that contributes to determining the cause of damage to the cylinder liner 53 specified by the serviceman. The terminal device 11 displays the contents of the attribute data extracted by the extracting means to the serviceman.

Fig. 27 is a schematic view of a screen displayed by the terminal device 11 to the serviceman in this modification. The screen of fig. 27 shows options such as "maintenance work", "use of fuel oil", "exhaust gas temperature and internal pressure". The page table and graph corresponding to each option shown in the screen of fig. 27 show the contents of attribute data corresponding to the category of the option name (option name). The page shown in fig. 27 is a page corresponding to the option name "maintenance job".

The maintenance work shown on the page of fig. 27 is, for example, a maintenance work performed on the cylinder 51 during a period from the last time (second time from last time) when the imaging device 14 performs imaging to the current time (last time), and the cylinder 51 corresponds to the cylinder liner 53 designated by the serviceman. The terminal apparatus 11 displays the page of fig. 27 using the attribute data extracted from the maintenance job database (fig. 25). The maintenance worker can judge whether damage to the cylinder liner 53 is caused by erroneous maintenance work (e.g., mixing of foreign matter such as screws into the cylinder 51) by looking at the page of fig. 27, for example.

FIG. 28 is a schematic page view of the corresponding option name "use fuel oil". The fuel oil shown on the page of fig. 28 is, for example, fuel oil used by the engine corresponding to the cylinder liner 53 designated by the serviceman during the period from the last time (the second time from the last time) when the image pickup device 14 performs image pickup to the current time (the last time). The terminal apparatus 11 displays the page of fig. 28 using the attribute data extracted from the usage fuel oil database (fig. 26). The maintenance worker can judge whether or not the damage of the cylinder liner 53 is caused by the fuel oil used (for example, the content of silica, alumina, and the like in the fuel oil) by looking at the page of fig. 28, for example.

Fig. 29 is a schematic page view of the corresponding option name "exhaust temperature/internal pressure". The page of fig. 29 shows a graph showing the temporal change of the exhaust gas temperature and the internal pressure of the cylinder 51 corresponding to the cylinder liner 53 designated by the serviceman. In addition, the exhaust temperature and internal pressure will fluctuate according to the load of the engine. Therefore, the terminal device 11 converts the actually measured exhaust gas temperature and internal pressure into, for example, an exhaust gas temperature and internal pressure corresponding to 50% load by using a predetermined conversion formula (or conversion table) in accordance with the load of the engine corresponding to the cylinder liner 53 specified by the serviceman. The graph shown in fig. 29 represents the converted exhaust gas temperature and internal pressure.

The terminal device 11 displays the page of fig. 29 using the attribute data extracted from the engine attribute database (fig. 11). A service person looking at the page of fig. 29, for example, can determine whether damage to the cylinder liner 53 is due to a damaged cylinder 51 part (e.g., a damaged exhaust valve).

In this modification, for example, the damage of the cylinder liner 53 may be detected by image analysis processing of the terminal device 11. In this case, it is not necessary for the maintenance worker to detect the damage of the cylinder liner 53 by visual image. In addition, in this modification, the attribute data may be extracted according to the condition corresponding to the detected damage type (for example, the type of scratch, corrosion, or the like). For example, a configuration may be adopted in which the attribute data relating to the maintenance work is extracted if it is detected that the cylinder liner 53 is scratched, and the attribute data relating to the engine load is extracted if it is detected that it is corroded by low temperature.

(16) In the above embodiment, the server apparatus 12 may include a part of the configuration of the terminal device 11. In the above-described embodiment, the terminal device 11 may include a part of the components of the server apparatus 12. For example, in the above-described embodiment, the terminal device 11 may include the relationship data generation means 123 of the server apparatus 12.

(17) In the above-described embodiment, the image captured by the imaging device 14 covers the entire area of the cylinder liner 53 during the period in which the piston 54 reciprocates once in the cylinder 51 (to be precise, during the movement of either the forward or backward direction). Instead, the imaging device 14 may be configured to capture a clear image of only a predetermined region of the cylinder liner 53. For example, when the serviceman simply wants to know the state of wear of the area near the top of the cylinder liner 53, the imaging device 14 may perform imaging only at a position near the top.

(18) In the above-described embodiment, the terminal device 11 and the server apparatus 12 are realized by a general computer performing processing in accordance with a program. Instead, at least one of the terminal device 11 and the server apparatus 12 may be a so-called dedicated device.

Claims

1. A system for inspecting a cylinder liner, comprising:

a camera device which can be placed on the upper surface of the piston of the engine and is used for shooting the inner side surface of the cylinder liner and generating the image data of the cylinder liner representing the shot image, wherein the cylinder liner covers the inner side surface of the cylinder, and the cylinder accommodates the piston; and

a position data acquiring means for acquiring position data indicating a position of the imaging means in a moving direction of the piston;

wherein, the image generated by the camera device covers the 360-degree shooting area of the cylinder liner in the circumferential direction.

2. The system of claim 1,

the system comprises a command device for commanding the camera device to shoot when the position data represents the predetermined position,

the camera shooting device shoots according to the instruction of the instruction device.

3. The system according to claim 1 or 2, wherein the position data acquiring means acquires crank angle data indicating a crank angle with respect to the piston, and generates the position data using the crank angle data.

4. The system of claim 1 or 2,

the system includes a distance measuring device, which is placed on the upper surface of the piston, for measuring the distance between the upper surface of the piston and the fire contact surface of the cylinder head placed on the top of the cylinder, and generating moving direction distance data representing the measured distance,

the position data obtaining means generates the position data using the moving direction distance data.

5. The system according to claim 1 or 2, wherein the image pickup means picks up a fire surface of a cylinder head placed on the top of the cylinder and generates fire surface image data representing the picked-up image,

the position data obtaining device generates the position data using the image data of the fire-contacting surface.

6. The system according to claim 1 or 2, wherein the position data obtaining means generates the position data using the cylinder liner image data.

7. The system according to claim 1, wherein the system comprises a direction data acquiring means for acquiring direction data indicating a shooting direction of the image pickup means.

8. The system according to claim 7, wherein the image pickup device picks up a fire surface of a cylinder head placed on a top of the cylinder and generates fire surface image data representing the picked-up image,

the direction data obtaining device generates the direction data by using the image data of the fire-touching surface.

9. The system of claim 7, wherein the orientation data acquiring means generates the orientation data using the cylinder liner image data.

10. The system of claim 1,

the image pickup device measures a distance from the image pickup device to a subject to be photographed and generates photographing distance data representing the measured distance,

the system includes a correction device for correcting the cylinder liner image data using the shot distance data.

11. The system of claim 1,

the image pickup device picks up a fire surface of a cylinder head placed on the top of the cylinder, and generates fire surface image data representing the picked-up image,

the system includes a correction device for correcting the cylinder liner image data using the spark surface image data.

12. The system of claim 1, including a wear determination device that determines a degree of wear of the cylinder liner using the cylinder liner image data and generates wear data indicative of the determined degree of wear.

13. The system of claim 12,

the imaging device generates cylinder liner pattern data regarding each of a plurality of cylinders of the same type contained in an engine equipped on one ship or each of a plurality of ships of the same type,

the system comprises:

an attribute data acquisition means for acquiring attribute data representing an attribute that affects wear of the cylinder liner, the attribute being an attribute of a voyage that the ship or the ships of the same type have made in the past; and

a relationship data generating means generates relationship data indicating a relationship between the property and a degree of wear of the cylinder liner using the wear data and the property data.

14. The system of claim 12,

the imaging device generates cylinder liner image data on a cylinder included in an engine provided on a ship,

the system comprises:

an attribute data acquisition means for acquiring attribute data representing an attribute that affects wear of the cylinder liner, the attribute being an attribute of a voyage performed by the ship;

a relation data acquiring means for acquiring relation data indicating a relation between the attribute and a degree of wear of the cylinder liner; and

a wear estimation device estimates a degree of wear of the cylinder liner using the attribute data and the relationship data, and generates estimated wear data representing the estimated degree of wear.

15. The system as claimed in claim 14, wherein the system includes a notification means for sending a predetermined notification to a user when a difference between a degree of wear indicated by the estimated wear data generated by the wear estimation means and a degree of wear indicated by the wear data generated by the wear determination means satisfies a predetermined condition with respect to the cylinder liner at a certain time.

16. The system of claim 1,

the imaging device generates cylinder liner image data regarding each of a plurality of cylinders of the same type,

the system comprises:

an evaluation data acquiring device that acquires cylinder liner image data generated by the imaging device and evaluation data indicating an evaluation of a state of the cylinder liner based on an image indicated by the cylinder liner image data; and

an extracting means extracts evaluation data corresponding to cylinder liner image data having a predetermined similarity to cylinder liner image data specified by a user from the plurality of evaluation data acquired by the evaluation data acquiring means.

17. The system of claim 1,

the imaging device generates cylinder liner pattern data on a cylinder included in an engine provided on a ship,

the system comprises:

an attribute data acquisition means for acquiring attribute data indicating an attribute of a voyage of the ship performed in the past; and

and an extracting device for extracting attribute data satisfying a predetermined condition corresponding to the damage from the plurality of attribute data acquired by the attribute data acquiring device when the image represented by the cylinder liner image data generated by the imaging device indicates that the cylinder liner is damaged.

18. A method for inspecting a cylinder liner, comprising:

a step of moving a piston of an engine with a camera device placed on the upper surface in a cylinder accommodating the piston; and

a step of shooting the inner side surface of the cylinder liner covering the inner side surface of the cylinder by the camera device during the movement of the piston in the cylinder or after the piston finishes moving in the cylinder;

19. A holding tool which can be placed on the upper surface of a piston of an engine, and which prevents heat from being transferred from the piston to an image pickup device for picking up an inner side surface of a cylinder liner covering an inner side surface of a cylinder which accommodates the piston while holding the image pickup device;

20. The holding instrument of claim 19, wherein the holding instrument has an elastomer disposed between the camera device and the upper surface of the piston.

21. The holding device according to claim 19 or 20, wherein the image capturing area of the image capturing device has characters, symbols or figures indicating the image capturing direction of the image capturing device.

22. The holding instrument of claim 19, wherein the holding instrument has feet supporting the camera device such that the camera device is spaced from the upper surface of the piston.

23. Holding means according to claim 19, wherein the holding means has a wand insertable into a recess provided in the upper surface of the piston.

24. The holding device of claim 19, wherein the holding device has a contact surface shaped to engage the upper surface of the piston.