Patent Grant
11027814
The embodiments discussed herein relate to a ship reverse-run detection system, a ship reverse-run detection method, and a ship reverse-run detection program.
Technologies of notifying the navigation state of a ship to another ship include a ship automatic identification device.
Related technologies are disclosed in Japanese Laid-open Patent Publication No. 2012-86670.
According to an aspect of the embodiments, a ship reverse-run detection system includes a memory, and a processor coupled to the memory, wherein the processor is configured to: detect a direction of change in a position of a ship based on position information of the ship which is detected by a position detection device which is mounted on the ship, specify a traveling direction associated with a navigation region of the ship which is specified based on the position information, by referring to a storage which stores the navigation region and the traveling direction in association with each other, and detect reverse run of the ship in the navigation region based on the magnitude of an angle between the direction of the change and the traveling direction.
The object and advantages of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the claims.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, as claimed.
For example, in a ship automatic identification device using a universal shipborne automatic identification system (AIS), the AIS transmits ship information of the own ship to another ship, and upon reception of such ship information, the other ship displays information related to another ship on a display unit. The ship information includes the name and position information of a ship. It may be determined whether ship information has to be urgently received by referring to a sailing state such as a BLUE SIGN (binary data of information for notifying reverse run of a ship in a waterway to another ship).
However, this configuration only performs communication of ship information between ships. Thus, the configuration provides no method of detecting reverse run of a ship, and determination of reverse run is left to a crew member such as the operator of a ship.
For example, a ship reverse-run detection computer system capable of detecting reverse run of a ship may be provided.
The following describes embodiments of a ship reverse-run detection computer system, a ship reverse-run detection method, and a ship reverse-run detection program according to the embodiments with reference to the accompanying drawings. The embodiments do not limit the disclosed technology. The embodiments may be combined as appropriate while the contents of processing are maintained consistent.
[System Configuration]
The navigation management service and the navigation support service are applicable to a ship of any classification, particularly to a small-sized ship, which makes the services further useful. Installation of a marine instrument such as an automatic identification system (AIS) is requested for large-sized ships, but not for small-sized ships. This situation makes it more difficult to provide navigation management and navigation support of small-sized ships, for example, ships used in marine leisure, which are called pleasure boats (5A to 5C) than those of large-sized ships.
Thus, the navigation management support system 1 utilizes, for the navigation management service and the navigation support service, functions of portable terminal devices 50A to 50C owned by crew members of the pleasure boats 5A to 5C, for example, ship operators thereof. Hereinafter, when collectively referred, the pleasure boats 5A to 5C are also referred to as a “pleasure boat 5”.
The following exemplarily describes a case in which the navigation management service and the navigation support service are provided to the pleasure boat 5, but the navigation management service and the navigation support service may be provided to any other small-sized ship such as a fishing boat. In addition, the navigation management service and the navigation support service may be provided to any large-sized ship by exploiting the existing technology such as AIS.
As illustrated in
The server device 10 is a computer configured to provide the navigation management service to the client terminal 30.
According to an embodiment, the server device 10 may be implemented by installing, to a desired computer, a navigation management program configured to achieve the navigation management service as package software or online software. For example, the server device 10 may be implemented as a Web server configured to provide the navigation management service or may be implemented as a cloud configured to provide the navigation management service by outsourcing.
The client terminal 30 is a computer configured to receive provision of the navigation management service from the server device 10. The client terminal 30 may be used by, for example, any person concerned with the marina such as a staff or manager of the marina.
According to the embodiment, the client terminal 30 may be achieved by a personal computer. The client terminal 30 is not limited to a stationary information processing device such as a personal computer as described above, but may be various portable terminal devices that the marina lends to a person concerned therewith. Examples of the “portable terminal devices” include mobile communication terminals such as a smartphone, a cellular phone, and a personal handyphone system (PHS) phone, a slate terminal, and a tablet terminal.
For example, the client terminal 30 receives request for login to the server device 10 by receiving inputting of account information allocated to the marina, for example, an identification (ID) and a password. When this login request is transmitted from the client terminal 30 to the server device 10, the server device 10 executes login authentication. When the login authentication is successful, the navigation management service related to the marina is released to the client terminal 30 having succeeded the login authentication.
The server device 10 and the client terminal 30 are connected with each other through a predetermined network. Examples of such a network include optional kinds of wired and wireless communication networks such as the Internet, a local area network (LAN), and a virtual private network (VPN).
The portable terminal device 50 is used as a computer configured to provide the navigation support service. The “portable terminal device 50” is, for example, that used by a crew member such as the ship operator of the pleasure boat 5.
According to the embodiment, an application program configured to achieve the navigation support service is installed on the portable terminal device 50. Hereinafter, such an application program configured to achieve the navigation support service is also referred to as a “navigation support App”. The portable terminal device 50 performs, by executing the navigation support App through a processor thereof, various warnings that contribute to safety navigation as exemplary navigation support service.
As an aspect of the navigation support service, for example, the portable terminal device 50 automatically or manually notifies the server device 10 of departure and arrival of the pleasure boat 5 that the ship operator holding the portable terminal device 50 is on board from and at a ship port. This provides such port departure and arrival determination service that the notification of port departure and arrival of the pleasure boat 5 is output through a predetermined display device or a voice output device or the port departure and arrival notification of the pleasure boat 5 is uploaded to the server device 10 to record port departure and arrival in the server device 10. In addition, the portable terminal device 50 performs, over a sailing duration between port departure and arrival of the pleasure boat 5, various kinds of warnings such as a warning related to dangerous objects such as a shoal, a reef, and a fishing net, a warning related to ship operation exceeding a navigation range of the pleasure boat 5 determined based on skills and a license of the ship operator of the pleasure boat 5, the size of the boat, and the like, a warning related to entry to a restricted region such as a port or a river, a warning related to anchor dragging to the pleasure boat 5 performing anchoring, a warning related to reverse-run of a course, and a warning related to approach of all kinds of other ships including small-sized and large-sized ships.
As another aspect, the portable terminal device 50 uploads, only during the above-described sailing duration, position information measured by a position detection unit, such as a global positioning system (GPS) receiver, included in the portable terminal device 50 to the server device 10. Accordingly, the portable terminal device 50 establishes a foundation that allows the server device 10 to provide the navigation management service to the client terminal 30. The server device 10 is capable of managing, based on the foundation, for example, port departure and arrival of the pleasure boat 5 and the current position after port departure of the pleasure boat 5. In addition, the server device 10 is capable of receiving an emergency request for rescue of the pleasure boat 5 from the portable terminal device 50, setting, on a map including a port under jurisdiction of the marina and a marine area around the port, a symbol of a dangerous object for which the portable terminal device 50 sets off a warning, and displaying, in a display manner different from those of other symbols, a symbol of the pleasure boat 5 for which the portable terminal device 50 is executing the above-described various warnings among symbols of ships indicated on the map. Hereinafter, a port under jurisdiction of the marina and a marine area around the port are also referred to as a “jurisdiction zone”.
Communication is performed between the server device 10 and the portable terminal device 50 through an optional network connected through a base station in which the portable terminal device 50 is housed. Although not illustrated, communication is performed between the client terminal 30 and the portable terminal device 50 in a similar manner.
[Configuration of Server Device 10]
The communication I/F unit 11 is an interface configured to control communication with another device such as the client terminal 30 or the portable terminal device 50.
According to the embodiment, as an aspect, the communication I/F unit 11 may be achieved by a network interface card such as a LAN card. For example, the communication I/F unit 11 receives a request to browse a monitoring screen from the client terminal 30, and transmits, to the client terminal 30, display data of a monitoring screen including a map related to the jurisdiction zone of the marina. In addition, the communication I/F unit 11 receives a request to download the navigation support APP from the portable terminal device 50, position information of the pleasure boat 5, and an alert output status at the portable terminal device 50, and transmits, for example, data of the navigation support APP and navigation support data including course data to the portable terminal device 50.
The storage unit 13 is a storage device configured to store data used by various computer programs such as an operating system (OS) executed at the control unit 15 and an application program that achieves the navigation management service.
According to the embodiment, the storage unit 13 may be provided as an auxiliary storage device of the server device 10. For example, the storage unit 13 may be achieved by a hard disk drive (HDD), an optical disk, or a solid state drive (SSD). The storage unit 13 does not necessarily have to be provided as an auxiliary storage device, but may be provided as a main storage device of the server device 10. In this case, the storage unit 13 may be achieved by various semiconductor memory elements such as a random access memory (RAM) and a flash memory.
The storage unit 13 stores, as exemplary data used by a computer program executed at the control unit 15, map data 13a, navigation support data 13b, and navigation data 13c. In addition to the map data 13a, the navigation support data 13b, and the navigation data 13c, the storage unit 13 may store property information related to a ship, such as information in which a ship name, a captain name, the number of crew members are associated with each other for each ship number. Among the map data 13a, the navigation support data 13b, and the navigation data 13c, the navigation support data 13b will be described at a situation in which the navigation support data 13b is referred to.
The map data 13a is electronic data of a marine chart. The marine chart is, for example, a general chart, sailing chart, a nautical chart, a coast chart, or a harbor chart. All or some of these charts are stored in the storage unit 13 as the map data 13a. The map data 13a includes pieces obtained by dividing, in mesh, the entire map included in the map data 13a. Thus, when the server device 10 transmits the map data 13a to the client terminal 30 or the portable terminal device 50, not the entire map included in the map data 13a has to be transmitted, but only part of the map data 13a may be transmitted. For example, when the map data 13a is transmitted from the server device 10 to the client terminal 30, map data of the jurisdiction zone corresponding to the client terminal 30 or an element corresponding to part of the jurisdiction zone is extracted from the map data 13a and then transmitted. When the map data 13a is transmitted from the server device 10 to the portable terminal device 50, map data of an element corresponding to a predetermined range with respect to position information specified by the portable terminal device 50, in other words, a current position is extracted from the map data 13a and then transmitted.
The navigation data 13c is data related to navigation.
According to the embodiment, the navigation data 13c may be data including items such as a marina ID, a port departure ID, a ship ID, a port departure scheduled date and time, a port arrival scheduled date and time, a port departure date and time, a port arrival date and time, and a current position. The “marina ID” is identification information of the marina, and may be, for example, any optional system identifier as information that allows the server device 10 to identify the marina. The “port departure ID” is information for identifying a ship departing from the port managed by the marina, and is allocated with a number in the order of port departure notice submission among port departure notices having the same date of the port departure scheduled date and time. The “ship ID” is information for identifying a ship, and may be, for example, a ship number provided to the ship. The ship number is also called a “ship identification number”.
Values may be registered to the items of the “port departure ID”, the “ship ID”, the “port departure scheduled date and time”, and the “port arrival scheduled date and time”, for example, when a port departure notice is submitted to the marina. For example, when a port departure notice is received online by the marina, or when a port departure notice is received online by, on behalf of the marina, a business operator that provides the navigation management service and the navigation support service, the port departure ID, the ship ID, the port departure scheduled date and time, and the port arrival scheduled date and time that are included in electronic data of the port departure notice in association with the marina ID of the marina to which the port departure notice is submitted may be registered to the storage unit 13.
Only when a port departure notification is received from the portable terminal device 50, the date and time of the reception of the port departure notification is registered to the “port departure date and time”. Only when a port arrival notification is received from the portable terminal device 50, the date and time of the reception of the port arrival notification is registered to the “port arrival date and time”. The “current position” is overwritten with position information uploaded from the portable terminal device 50, a status related to port departure and arrival of which is set to “departed”, at each uploading in a predetermined duration, for example, one minute.
The above-described table is exemplary, and may have, for example, no status column or may store an additional item other than the status column. When the kind of alert is received from a data communication unit 58e to be described later, the kind of alert may be stored as an alert state in association with a ship ID. As long as the above-described data items are allowed to be stored in association with each other and referred to, data does not have to be collectively stored in a single table but may be managed in a divided manner in a plurality of tables.
The control unit 15 includes an internal memory configured to store various computer programs and various kinds of control data, and executes various kinds of processing based on these computer programs and control data.
According to the embodiment, the control unit 15 is achieved as a central processing unit (CPU). the control unit 15 does not necessarily have to be achieved as a central processing unit, but may be achieved as a micro processing unit (MPU). Alternatively, the control unit 15 may be achieved by a hard-wired logic such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA).
The control unit 15 virtually achieves processing units described below by loading, as a process onto a work area of a RAM, such as a dynamic random access memory (DRAM) or a static random access memory (SRAM), mounted as a main storage device (not illustrated), the navigation management program stored in the storage unit 13 as an application program that achieves the above-described the navigation management service.
For example, as illustrated in
The distribution unit 15a is a processing unit configured to perform distribution to the portable terminal device 50.
According to the embodiment, when having received, from the portable terminal device 50, a request to download the navigation support App, the distribution unit 15a distributes the navigation support data 13b stored in the storage unit 13 to the portable terminal device 50. The navigation support data 13b includes the data of the navigation support App and various kinds of data to be used by the navigation support App. Examples of the data to be used by the navigation support APP include navigation data in which a navigation region on a course is associated with a traveling direction. The navigation region may be defined by position information of a buoy disposed on a course in accordance with navigation rules.
The navigation recording unit 15b is a processing unit configured to perform recording related to navigation.
According to the embodiment, when having received a port departure notification from the portable terminal device 50, the navigation recording unit 15b executes processing as follows. Specifically, the navigation recording unit 15b records the date and time of reception of the port departure notification to the port departure date and time of a record having a marina ID and a port departure ID identical to those included in the port departure notification among records stored as the navigation data 13c in the storage unit 13. In this example, it is assumed that duplicate port departure IDs are allocated to marinas, and both of a marina ID and a port departure ID are used to search records. However, the record search may be performed by only using the port departure ID when different port departure IDs are allocated to marinas. When having received a port arrival notification from the portable terminal device 50, the navigation recording unit 15b executes processing as follows. Specifically, the navigation recording unit 15b records the date and time of reception of the port arrival notification to the port arrival date and time of a record having a marina ID and a port departure ID identical to those included in the port arrival notification among records stored as the navigation data 13c in the storage unit 13. The navigation recording unit 15b also executes processing as follows each time position information is notified from the portable terminal device 50. Specifically, the navigation recording unit 15b overwrites and updates the position information with the current position of a record having a marina ID and a port departure ID identical to those notified together with the position information among records stored as the navigation data 13c in the storage unit 13.
The alert reception unit 15c is a processing unit configured to receive an alert execution notification from the portable terminal device 50.
According to the embodiment, when an alert is output at the portable terminal device 50, the alert reception unit 15c receives, from the portable terminal device 50, an alert execution notification including the kind of the alert output at the portable terminal device 50.
The map display unit 15d is a processing unit configured to cause the client terminal 30 display a map.
According to the embodiment, when a request to browse a monitoring screen is received on a menu screen (not illustrated) displayed on the client terminal 30, the map display unit 15d executes processing as follows. For example, the map display unit 15d specifies a marina ID from an account used, at login authentication, by the client terminal 30 having issued a request to browse the monitoring screen. Subsequently, the map display unit 15d further specifies a jurisdiction zone corresponding to the specified marina ID by referring to jurisdiction data (not illustrated) in which the marina ID of each marina is associated with the jurisdiction zone of the marina. Then, the map display unit 15d extracts, from the map data 13a stored in the storage unit 13, map data including the jurisdiction zone corresponding to the specified marina ID. Thereafter, the map display unit 15d causes the client terminal 30 to display a monitoring screen including the extracted map of the jurisdiction zone of the marina.
For example, any record having a registered current position is extracted from among records included in the navigation data 13c, and then the current position of any ship included in the record may be mapped on the map of the jurisdiction zone of the marina included in the above-described monitoring screen. When the current position of a ship is mapped in this manner, the client terminal 30 may display, for example, property information related to the ship in association with a symbol indicating the ship. The property information of a ship may be displayed on a window different from the monitoring screen. Moreover, among symbols of ships mapped on the map of the jurisdiction zone of the marina, the symbol of a ship from which an alert execution notification is received by the alert reception unit 15c may be displayed on the monitoring screen in a display manner different from that for the symbol of any other ship. In this case, the symbol of this ship may be displayed in a display manner that further differs between the kinds of outputting on the portable terminal device 50.
[Configuration of Portable Terminal Device 50]
The touch panel 51 is a device capable of performing display and receiving inputting.
As an aspect related to display, the touch panel 51 displays images output from an OS executed on the portable terminal device 50 and an application program such as the navigation support App. As an aspect related to input, the touch panel 51 receives touch operations such as tap, flick, swipe, pinch-in, and pinch-out performed on a screen of the touch panel 51. In this example, the touch panel 51 is described as an exemplary display unit, but does not necessarily have to provide both displaying and inputting functions. The touch panel 51 may be achieved individually by a display device and an input device.
The wireless communication unit 52 is a processing unit configured to connect with the base station through an antenna (not illustrated) to perform data transmission and reception to and from any other device such as the server device 10 through, for example, a mobile communication network connected with the base station.
The camera 53 is an image capturing apparatus configured to capture images.
According to the embodiment, the camera 53 includes an image sensor such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). For example, the camera 53 may include light receiving elements of three kinds such as R (red), G (green), and B (blue).
The position detection unit 54 is a kind of hardware configured to detect the position of the portable terminal device 50.
According to the embodiment, the position detection unit 54 may be a GPS receiver configured to detect a position based on time information transmitted from a plurality of GPS satellites. The position detected by the GPS receiver in this manner does not necessarily have to be directly used, but may be subjected to various kinds of correction by using, for example, position information transmitted from the base station connected with the portable terminal device 50.
The storage unit 55 is a storage device configured to store the OS executed by the control unit 57 and data used by various computer programs such as application programs.
According to the embodiment, the storage unit 55 may be provided as a main storage device of the server device 10. For example, the storage unit 55 may be achieved by various semiconductor memory elements such as a RAM such as a DRAM or a SRAM and a flash memory. The storage unit 55 does not necessarily have to be provided as a main storage device, but may be provided as an auxiliary storage device of the portable terminal device 50. In this case, the storage unit 55 may be achieved by a HDD, an optical disk, or a SSD.
The storage unit 55 stores, as exemplary data used by a computer program executed by the control unit 57, navigation support data 56. In addition to the navigation support data 56, the storage unit 55 may store user data of the portable terminal device 50.
The control unit 57 is a processing unit configured to govern entire control of the portable terminal device 50.
According to the embodiment, the control unit 57 is provided as a central processing unit (CPU). The control unit 57 does not necessarily have to be provided as a central processing unit, but may be provided as an MPU. The control unit 57 may be achieved by a hard-wired logic such as an ASIC or an FPGA.
As illustrated in
The download unit 57a is a processing unit configured to execute various kinds of downloading.
The following describes an exemplary method of downloading the navigation support App installed on the portable terminal device 50. For example, downloading of the above-described navigation support App starts when a two-dimensional bar code issued by the marina is read through the camera 53 of the portable terminal device 50. Such a two-dimensional bar code is read, for example, when a port departure notice is submitted to the marina. Once the port departure notice is submitted to the marina in this manner, a port departure ID is allocated by the server device 10, and then a new record in which, for example, the port departure ID, the marina ID of the marina having received the port departure notice, a ship ID, a port departure scheduled date and time, and a port arrival scheduled date and time received through the port departure notice are associated with each other is generated in the navigation data 13c. Thereafter, address information such as a uniform resource locator (URL) through which the server device 10 is accessed, the marina ID, and the port departure ID are coded. In this manner, a two-dimensional bar code including the marina ID and the port departure ID is generated. Thereafter, the two-dimensional bar code including the URL, the marina ID, and the port departure ID is read by capturing, through the camera 53, a sheet on the two-dimensional bar code is output by printing or a screen of a display device on which the two-dimensional bar code is displayed.
When the two-dimensional bar code including the URL, the marina ID, and the port departure ID is read in this manner, the download unit 57a transmits, by referring to the address of the URL, a request to download the navigation support App including the marina ID and the port departure ID to the server device 10. As a result, the navigation support App data 56a included in the navigation support data 13b, and navigation support data including various kinds of data (for example, the course data 56b) used by the navigation support App are downloaded as the navigation support data 56 from the server device 10. In addition, for example, the marina ID and the port departure ID are registered to the storage unit 55 for identification of a marina to which the pleasure boat 5 belongs and the pleasure boat 5 itself by the server device 10. Thereafter, the download unit 57a activates the navigation support App data 56a downloaded from the server device 10 by loading the navigation support App execution unit 58 onto a work area of a RAM such as the storage unit 55.
The activation of the navigation support App allows the portable terminal device 50 to start providing the navigation support service. After the activation at the portable terminal device 50, the navigation support App continues operating on background until completion of port departure and port arrival submitted through the port departure notice, irrespective of any operation to end the navigation support App by a user.
As illustrated in
The acquisition unit 58a is a processing unit configured to acquire position information.
According to the embodiment, the acquisition unit 58a acquires position information from the position detection unit 54 at each position detection by the position detection unit 54. The acquired position information is, for example, latitude and longitude coordinates. The following description assumes an example in which position information sampled in predetermined period, for example, five seconds by the position detection unit 54 is acquired.
The first detection unit 58b is a processing unit configured to detect a direction in which the position of the pleasure boat 5 changes.
According to the embodiment, at each acquisition of position information by the acquisition unit 58a, the first detection unit 58b executes processing as follows. Specifically, the first detection unit 58b refers to the course data 56b stored as the navigation support data 56 in the storage unit 55. Then, the first detection unit 58b determines whether the position information acquired by the acquisition unit 58a is included in a navigation region included in the course data 56b. When the position information is included in a navigation region included in the course data 56b, it is identified that the current position of the pleasure boat 5 is in a course. In this case, the first detection unit 58b detects the direction of change in the position of the pleasure boat 5 based on the position information acquired by the acquisition unit 58a and position information acquired by the acquisition unit 58a, for example, 30 seconds before the position information. In this exemplary description, the position information acquired 30 seconds before, in other words, six frames before is used to detect the direction of change in the position of the pleasure boat 5, but any position information acquired in the past, namely, position information acquired N frames (N is a natural number) before may be used.
The specification unit 58c is a processing unit configured to specify the traveling direction of the pleasure boat 5.
According to the embodiment, when the position information acquired by the acquisition unit 58a is included in a navigation region included in the course data 56b, the specification unit 58c specifies, by referring to the course data 56b, the traveling direction of a course associated with the navigation region in which the position information is included.
The second detection unit 58d is a processing unit configured to detect reverse run of the pleasure boat 5 in a navigation region.
According to the embodiment, the second detection unit 58d calculates an angle between the traveling direction of the course specified by the specification unit 58c and the direction of change in the position of the pleasure boat 5 detected by the first detection unit 58b. The angle indicates an angle at which the moving direction of the pleasure boat 5 deviates from the traveling direction of the course, and thus is also referred to as a “course deviation angle”. Then, the second detection unit 58d determines whether the course deviation angle is equal to or larger than a predetermined threshold, for example, 90°. When the course deviation angle is equal to or larger than the threshold, it is estimated that the pleasure boat 5 is likely to be reversely running the course. In this case, the second detection unit 58d outputs a message telling reverse run in the course as an alert through display on the touch panel 51, or outputs a sound effect telling reverse run in the course or the above-described message as an alert by voice through a speaker (not illustrated) or the like. The threshold is 90° in this example, but may be 160° or 165° to reduce the occurrence of false reverse-run detection due to error in positioning by the GPS receiver.
In addition, the second detection unit 58d may set a course reverse-run distance to be the distance between the position information acquired by the acquisition unit 58a and position information acquired by the acquisition unit 58a, for example, 30 seconds before the position information, and may further determine whether the course reverse-run distance is equal to or larger than a predetermined threshold, for example, 30 m. Then, an alert related to course reverse run may be output only when the course reverse-run distance is equal to or larger than the threshold.
According to another embodiment, the second detection unit 58d calculates an angle identified as a direction opposite to the traveling direction of the course in accordance with the traveling direction of the course specified by the specification unit 58c. Hereinafter, the angle identified as a direction opposite to the traveling direction of the course is also referred to as a “reverse-run identification angle”. In accordance with the reverse-run identification angle, the second detection unit 58d sets a range in which the moving direction of the pleasure boat 5 is identified to be opposite to the traveling direction of the course with respect to position information acquired by the acquisition unit 58a, for example, 30 seconds before the position information acquisition by the acquisition unit 58a. Hereinafter, the range in which the pleasure boat 5 is identified to be moving in the direction opposite to the traveling direction of the course is also referred to as a “reverse-run identification range”.
As illustrated in
After having set the reverse-run identification range, the second detection unit 58d determines whether the position information acquired by the acquisition unit 58a, in other words, the current position of the pleasure boat 5 is included in the reverse-run identification range. When the current position of the pleasure boat 5 is included in the reverse-run identification range, it is determined that the moving direction of the pleasure boat 5 is opposite to the traveling direction of the course.
In this case, the second detection unit 58d extracts a movement component in the direction opposite to the course from displacement between each pair of temporally sequential pieces of position information among a plurality of pieces of position information acquired over a predetermined past duration, for example, 30 seconds, including the position information acquisition by the acquisition unit 58a. Subsequently, the second detection unit 58d tallies the movement component in the opposite direction, which is extracted for each pair of pieces of position information. Then, the second detection unit 58d further determines whether the tallied value of the movement component in the opposite direction is equal to or larger than a predetermined threshold, for example, 30 m.
When the tallied value of the movement component in the opposite direction is equal to or larger than the threshold, it is determined that the moving direction of the pleasure boat 5 is opposite to the traveling direction of the course and the amount of movement in the opposite direction is large. In this case, the second detection unit 58d outputs a message telling reverse run in the course as an alert through display on the touch panel 51, or outputs a sound effect telling reverse run in the course or the above-described message as an alert by voice through a speaker (not illustrated) or the like. A diagram such as that illustrated in
The data communication unit 58e is a processing unit configured to perform communication such as data uploading and downloading with the server device 10.
According to the embodiment, when a port arrival operation or a port departure operation is received through the touch panel 51, the data communication unit 58e uploads a port departure notification or a port arrival notification to the server device 10. The data communication unit 58e also uploads, only during a sailing duration from reception of a port departure operation to reception of a port arrival operation through the touch panel 51, position information measured by the position detection unit 54 to the server device 10. The position information may be uploaded at each measurement of position information by the position detection unit 54, but may be uploaded in a period longer than a period in which the position detection unit 54 samples the position information. In addition, at each detection of reverse run by the second detection unit 58d, the data communication unit 58e uploads an alert execution notification including the kind of this alert, a marina ID, and a port departure ID to the server device 10. The data communication unit is an exemplary transmission unit.
[Processing Flow]
As illustrated in
Subsequently, the specification unit 58c determines whether the position information acquired at step S102 is included in a navigation region included in the course data 56b acquired at step S101 (step S103). When the position information is included in the navigation region (Yes at step S103), it is identified that the current position of the pleasure boat 5 is in the course. In this case, the specification unit 58c specifies the traveling direction of the course associated with the navigation region in which the position information acquired at step S102 is included among traveling directions included in the course data 56b acquired at step S101 (step S104).
Then, the second detection unit 58d sets the reverse-run identification range based on the traveling direction of the course specified at step S104 and position information acquired by the acquisition unit 58a, for example, 30 seconds before the position information acquisition at step S102 (step S105).
Subsequently, the second detection unit 58d determines whether the position information acquired at step S102, in other words, the current position of the pleasure boat 5 is included in the reverse-run identification range set at step S105 (step S106). When the current position of the pleasure boat 5 is included in the reverse-run identification range (Yes at step S106), it is determined that the moving direction of the pleasure boat 5 is opposite to the traveling direction of the course.
In this case, the second detection unit 58d tallies a movement component in the opposite direction of the course, which is extracted for each pair of temporally sequential pieces of position information among a plurality of pieces of position information acquired over predetermined past duration, for example, 30 seconds including the position information acquisition at step S102 (step S107). Then, the second detection unit 58d further determines whether the tallied value of the movement component in the opposite direction, which is obtained at step S107 is equal to or larger than a predetermined threshold, for example, 30 m (step S108).
When the tallied value of the movement component in the opposite direction is equal to or larger than the threshold (Yes at step S108), it is determined that the moving direction of the pleasure boat 5 is opposite to the traveling direction of the course and the amount of movement in the opposite direction is large. In this case, the second detection unit 58d outputs a message telling reverse run in the course as an alert through display on the touch panel 51, or outputs a sound effect telling reverse run in the course or the above-described message as an alert by voice through a speaker (not illustrated) or the like (step S109), and the process transitions to step S102.
When the position information is not included in the navigation region (No at step S103), when the current position of the pleasure boat 5 is not included in the reverse-run identification range (No at step S106), or when the tallied value of the movement component in the opposite direction is smaller than the threshold (No at step S108), outputting of an alert related to course reverse run is canceled (step S110), and the process transitions to step S102. Specifically, when an alert related to course reverse run has been output based on position information sampled before position information sampling at step S102, the alert outputting is canceled. When no alert related to course reverse run has been output, the processing at step S110 is skipped.
[Aspects of Effects]
As described above, the navigation management support system 1 according to the present embodiment detects reverse run of a ship in a navigation region in which position information of the ship is included based on an angle between the direction of change in the position of the ship, which is determined from the locus of the position information and the traveling direction of the course, which is stored in association with the navigation region. Accordingly, the navigation management support system 1 according to the present embodiment is capable of detecting reverse run of a ship.
Although the embodiment related to devices according to the disclosure is described above, the present disclosure may be achieved in various kinds of different configurations other than the above-described embodiment. The following describes any other embodiment included in the disclosure.
[Processing Executor]
In Embodiment 1 described above, the processing illustrated in
[Separation and Integration]
The components of each device illustrated in the drawings do not necessarily have to be physically configured as illustrated. Specifically, a specific configuration of separation and integration of the devices is not limited to that illustrated in the drawings, but all or part of the configuration may be functionally or physically separated or integrated in arbitrary units in accordance with, for example, various loads and use statuses. For example, the distribution unit 15a, the navigation recording unit 15b, the alert reception unit 15c or the map display unit 15d may be provided as an external device of the server device 10 and connected with the server device 10 through a network. In addition, part or all of the processing units included in the navigation support App execution unit 58 may be provided as external devices of the portable terminal device 50 and connected with the portable terminal device 50 through a network. For example, the server device 10 may include part of the processing units included in the navigation support APP execution unit 58.
[Reverse-Run Detection Program]
The various kinds of processing described in the above-described embodiments may be achieved by a computer, such as a personal computer or a work station, executing a computer program prepared in advance. The following describes, with reference to
As illustrated in
Under such an environment, the CPU 150 reads the reverse-run detection program 170a from the HDD 170 and then loads the reverse-run detection program 170a onto the RAM 180. As a result, as illustrated in
The reverse-run detection program 170a does not necessarily have to be initially stored in the HDD 170 or the ROM 160. For example, each computer program may be stored in a “portable physical medium” such as a flexible disk (FD), a CD-ROM, a DVD disk, a magneto-optical disc, or an IC card to be inserted into the computer 100. Then, the computer 100 may acquire the computer program from the portable physical medium and execute the computer program. Alternatively, each computer program may be stored in another computer or a server device connected with the computer 100 through a public line, the Internet, a LAN, or a WAN, and the computer 100 may acquire the computer program from the other computer or the server device and execute the computer program.
All examples and conditional language recited herein are intended for pedagogical purposes to aid the reader in understanding the invention and the concepts contributed by the inventor to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions, nor does the organization of such examples in the specification relate to a showing of the superiority and inferiority of the invention. Although the embodiments of the present invention have been described in detail, it should be understood that the various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention.
This application is a continuation application of International Application PCT/JP2016/054030 filed on Feb. 10, 2016 and designated the U.S., the entire contents of which are incorporated herein by reference.
| Number | Name | Date | Kind |
|---|---|---|---|
| 20120101668 | Ioroi et al. | Apr 2012 | A1 |
| 20150130643 | Nagy | May 2015 | A1 |
| 20180043976 | Nakamoto | Feb 2018 | A1 |
| Number | Date | Country |
|---|---|---|
| 0 921 411 | Jun 1999 | EP |
| 7-65299 | Mar 1995 | JP |
| 11-165696 | Jun 1999 | JP |
| 2006-137309 | Jun 2006 | JP |
| 2012-86670 | May 2012 | JP |
| Entry |
|---|
| Author: Accuracy of GPS Data; Title: Accuracy of GPS Data; Title Date: Dec. 27, 2015; Publisher: Wiki; Pertinent pp. 2 (Year; 2015). |
| International Search Report dated Apr. 26, 2016 in corresponding International Patent Application No. PCT/JP2016/054030. |
| Number | Date | Country | |
|---|---|---|---|
| 20180354598 A1 | Dec 2018 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/JP2016/054030 | Feb 2016 | US |
| Child | 16054297 | US |
