Ship monitoring system, ship monitoring method, information processing device, and program

Abstract

[Problem] To provide a ship monitoring system whereby a user can easily ascertain change in a risk status. [Solution] A ship monitoring system that comprises: a first data generation unit that generates first ship data indicating the position and speed of a first ship; a second data generation unit that generates second ship data indicating the position and speed of a second ship; a risk value calculation unit that calculates a risk value indicating the risk that the first ship and the second ship will collide, on the basis of the first ship data and the second ship data; a pattern generation unit that generates an intermittent sound pattern that has a cycle that corresponds to the risk value; and an alarm sound generation unit that generates an alarm sound in accordance with the intermittent sound pattern.

Description

[Technical Field]

[0001] The present invention relates to a ship monitoring system, a ship monitoring method, an information processing device, and a program. [Background technology]

[0002] Conventionally, ship collision warnings initiate an audible and visual warning when the distance and time to the closest point of approach (CPA), calculated from the relative velocity vector between the ship and a target detected by radar or the like, exceed a predetermined threshold. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2019 / 031284 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional ship collision warning systems, the warning sound remains constant even when the risk situation changes, making it difficult for the user to grasp changes in the risk situation.

[0005] Patent Document 1 discloses a technology that reduces the frequency of an alarm sound as the distance from the vehicle to the target detected by the ultrasonic sensor decreases. However, this technology is designed for extremely short distances, whereas in the field of ships, the monitoring range is vast and it is necessary to calculate risks taking future conditions into account, so the required processing configuration is different.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its main purpose is to provide a ship monitoring system, a ship monitoring method, an information processing device, and a program that make it easy for users to grasp changes in risk situations. [Means for solving the problem]

[0007] In order to solve the above problem, one embodiment of the ship monitoring system of the present invention comprises a first data generation unit that generates first ship data representing the position and speed of a first ship, a second data generation unit that generates second ship data representing the position and speed of a second ship, a risk value calculation unit that calculates a risk value representing the risk of collision between the first ship and the second ship based on the first ship data and the second ship data, a pattern generation unit that generates an intermittent sound pattern having a period corresponding to the risk value, and an alarm sound generation unit that generates an alarm sound in accordance with the intermittent sound pattern.

[0008] In addition, another aspect of the ship monitoring method of the present invention generates first ship data representing the position and speed of a first ship using a first data generation unit, generates second ship data representing the position and speed of a second ship using a second data generation unit, calculates a risk value representing the risk of collision between the first ship and the second ship based on the first ship data and the second ship data, generates an intermittent sound pattern with a period corresponding to the risk value, and sounds an alarm in accordance with the intermittent sound pattern.

[0009] In addition, another aspect of the information processing device of the present invention includes a risk value calculation unit that calculates a risk value that represents the risk of collision between a first vessel and a second vessel based on first vessel data that represents the position and speed of the first vessel and second vessel data that represents the position and speed of the second vessel, a pattern generation unit that generates an intermittent sound pattern having a period that corresponds to the risk value, and an alarm sound generation unit that generates an alarm sound in accordance with the intermittent sound pattern.

[0010] In addition, another aspect of the program of the present invention causes a computer to calculate a risk value representing the risk of collision between a first vessel and a second vessel based on first vessel data representing the position and speed of a first vessel and second vessel data representing the position and speed of a second vessel, generate an intermittent sound pattern having a period corresponding to the risk value, and sound an alarm in accordance with the intermittent sound pattern. [Effects of the Invention]

[0011] According to the present invention, it becomes easier for a user to grasp changes in the risk situation. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram illustrating an example of the configuration of a vessel monitoring system according to an embodiment. [Figure 2] FIG. 2 is a diagram illustrating an example of a other ship management database. [Figure 3] FIG. 1 is a diagram illustrating an example of the configuration of an information processing device according to an embodiment. [Figure 4] FIG. 10 is a diagram illustrating an example of the relationship between a risk value and the period of an intermittent sound pattern. [Figure 5] FIG. 10 is a diagram illustrating an example of the relationship between a risk value and the period of an intermittent sound pattern. [Figure 6] FIG. 10 is a diagram showing an example of an intermittent sound pattern. [Figure 7] FIG. 10 is a diagram showing an example of one cycle of an intermittent sound pattern. [Figure 8] 10A and 10B are diagrams illustrating examples of intermittent sound patterns according to matching relationships. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0014] Fig. 1 is a block diagram showing an example of the configuration of a ship monitoring system 100 according to an embodiment. A ship monitoring method according to an embodiment is realized in the ship monitoring system 100. The ship monitoring system 100 is a system that is installed on a ship and monitors ships present in the vicinity.

[0015] The vessel equipped with the vessel monitoring system 100 is an example of a first vessel, and will be referred to as the "own vessel" in the following description. The vessels present around the own vessel are examples of second vessels, and will be referred to as the "other vessels" in the following description.

[0016] In the following description, "speed" is a vector quantity representing speed and direction (so-called ship speed vector), and "velocity" is a scalar quantity.

[0017] The vessel monitoring system 100 includes an information processing device 1, a display unit 2, a radar 3, an AIS 4, a GNSS receiver 5, a gyrocompass 6, an ECDIS 7, and an alarm unit 8. These devices are connected to a network N such as a LAN, and are capable of network communication with each other.

[0018] The information processing device 1 is a computer including a CPU, RAM, ROM, nonvolatile memory, an input / output interface, etc. The CPU of the information processing device 1 executes information processing in accordance with a program loaded from the ROM or nonvolatile memory to the RAM.

[0019] The program may be supplied via an information storage medium such as an optical disk or a memory card, or may be supplied via a communication network such as the Internet or a LAN.

[0020] The display unit 2 is, for example, a display device with a touch sensor. The touch sensor detects a position on the screen pointed to by a finger or the like. The pointed position may be input by a trackball or the like, instead of the touch sensor.

[0021] The radar 3 emits radio waves around the ship and receives the reflected waves, generating echo data based on the received signals. The radar 3 also identifies targets from the echo data and generates target tracking data (TT data) that indicate the position and speed of the targets.

[0022] The AIS (Automatic Identification System) 4 receives AIS data from other ships around the ship or from land-based control. Instead of AIS, a VDES (VHF Data Exchange System) may also be used. The AIS data includes the position and speed of other ships.

[0023] The GNSS receiver 5 detects the ship's position based on radio waves received from the GNSS (Global Navigation Satellite System). The gyrocompass 6 detects the ship's heading. A GPS compass or a magnetic compass may be used instead of a gyrocompass.

[0024] An ECDIS (Electronic Chart Display and Information System) 7 acquires the ship's position from the GNSS receiver 5 and displays the ship's position on an electronic chart. The ECDIS 7 also displays the ship's planned route on the electronic chart. A GNSS plotter may be used instead of an ECDIS.

[0025] The alarm sound generator 8 generates an alarm sound when there is a risk of collision between the ship and another ship. The alarm sound generator 8 is a speaker, and generates an alarm sound in accordance with an audio signal output from the information processing device 1.

[0026] In this embodiment, the information processing device 1 is an independent device, but is not limited to this and may be integrated with another device such as the ECDIS 7. In other words, the functional units of the information processing device 1 may be realized by another device such as the ECDIS 7.

[0027] Furthermore, the display unit 2 is also an independent device, but is not limited to this. A display unit of another device such as the ECDIS 7 may be used as the display unit 2 that displays the image generated by the information processing device 1.

[0028] In this embodiment, the combination of the GNSS receiver 5 and the ECDIS 7 is an example of a first data generator, which generates ship data indicating the ship's position and speed. Specifically, the GNSS receiver 5 detects the ship's position, and the ECDIS 7 detects the ship's speed from changes in the ship's position over time.

[0029] However, the speed of the ship may be detected based on the direction of the ship detected by the gyrocompass 6 and the speed of the ship detected by a ship's speedometer (not shown).

[0030] The radar 3 or the AIS 4 is an example of a second data generator, and generates other ship data indicating the position and speed of other ships. Specifically, the TT data generated by the radar 3 corresponds to other ship data. The AIS data generated by the AIS 4 also corresponds to other ship data.

[0031] 2 is a diagram showing an example of the other ship management database constructed in the memory of the information processing device 1. In the other ship management database, other ship data generated by the radar 3 or the AIS 4 is registered.

[0032] The other ship management database includes fields such as "other ship identifier," "position," "speed," and "direction." The positions and directions of other ships detected by radar 3 are converted into the same coordinate system as GNSS.

[0033] 3 is a diagram showing an example of the configuration of an information processing device 1 according to an embodiment. The information processing device 1 includes a risk value calculation unit 11, a pattern generation unit 12, and a match determination unit 13. These functional units are realized by the CPU of the information processing device 1 executing information processing in accordance with a program.

[0034] The risk value calculation unit 11 calculates a risk value that indicates the risk of collision between the own ship and another ship based on the own ship data and the other ship data. The risk value is calculated so that a higher value indicates a higher possibility of collision, and a lower value indicates a lower possibility of collision.

[0035] The risk value is calculated by, for example, a method using TCPA (Time to Closest Point of Approach) / DCPA (Distance to Closest Point of Approach). However, the risk value is not limited to this, and may be calculated by, for example, a method using SJ (Subject Judgment) value.

[0036] When the risk value calculated by the risk value calculation unit 11 is equal to or greater than a threshold, the pattern generation unit 12 generates an intermittent sound pattern for an alarm sound, and outputs an audio signal representing the intermittent sound pattern to the alarm sound generation unit 8. The alarm sound generation unit 8 generates an alarm sound in accordance with the intermittent sound pattern included in the audio signal.

[0037] When the risk calculation unit 11 calculates a risk value for each of a plurality of other ships, the pattern generation unit 12 generates an intermittent sound pattern for the other ship with the highest risk value. That is, the pattern is generated based on the highest risk value among the plurality of risk values.

[0038] In this embodiment, the pattern generation unit 12 generates an intermittent sound pattern with a period corresponding to the risk value. Specifically, the pattern generation unit 12 shortens the period of the intermittent sound pattern as the risk value increases, i.e., as the possibility of a collision increases, and lengthens the period of the intermittent sound pattern as the risk value decreases.

[0039] 4 and 5 are diagrams showing examples of the relationship between the risk value and the period of the intermittent sound pattern. The horizontal axis represents the risk value, and the vertical axis represents the reciprocal of the period. The pattern generation unit 12 may change the period of the intermittent sound pattern linearly as shown in FIG. 4 in response to changes in the risk value, or may change it stepwise as shown in FIG. 5.

[0040] The pattern generating unit 12 determines the period of the intermittent sound pattern corresponding to the risk value using a predetermined function or table.

[0041] FIG. 6 is a diagram showing examples of intermittent sound patterns. The top part of FIG. 6 is a diagram showing an example of the change in the period of the intermittent sound pattern over time. The periods of the intermittent sound pattern can be T1, T3, and T5, in order of shortest period. Pattern A in the middle part of FIG. 6 and pattern B in the bottom part show the timing at which the intermittent sound appears.

[0042] As shown in pattern A, if the intermittent sound is simply started to be emitted at the timing when the period is changed, the silent period from the intermittent sound immediately before the change may become shorter, as shown in the area surrounded by the dashed line in the figure, and the user may recognize this as an intermittent sound pattern with a shorter period than the original period.

[0043] Therefore, in this embodiment, when changing the period of the intermittent sound pattern, as shown in pattern B, the pattern generation unit 12 places the first intermittent sound when the elapsed time from the last intermittent sound immediately before the change reaches the changed period.

[0044] For example, when changing the period of the intermittent sound pattern from period T5 to period T3, the pattern generating unit 12 places the first intermittent sound of period T3 at the timing when the elapsed time from the intermittent sound immediately before the change reaches period T3.

[0045] Furthermore, when changing the period of the intermittent sound pattern from period T1 to period T5, the pattern generating unit 12 places the first intermittent sound of period T5 at the timing when the elapsed time from the intermittent sound immediately before the change reaches period T5.

[0046] Even if the period of the intermittent sound pattern is changed multiple times in a short period of time, the pattern generating unit 12 continues to count the time elapsed since the last intermittent sound, and places the first intermittent sound when the elapsed time reaches the latest period.

[0047] Returning to the explanation of Figure 3, the meeting determination unit 13 determines the meeting relationship between the ship and the other ships based on the ship data and the other ship data. The pattern generation unit 12 changes the mode of the intermittent sound pattern depending on the meeting relationship determined by the meeting determination unit 13.

[0048] 7 is a diagram showing an example of one cycle of an intermittent sound pattern. The intermittent sound pattern includes, in one cycle, a group period in which one or more intermittent sounds are grouped together, and a silent period in which no intermittent sounds are included. The intervals between the intermittent sounds in the group period are sufficiently small compared to the silent periods.

[0049] Specifically, the pattern generating unit 12 changes the number of intermittent sounds included in the collection period of the intermittent sound pattern according to the matching relationship determined by the matching determining unit 13. Fig. 7 shows an example in which three intermittent sounds are included in the collection period (three consecutive sounds).

[0050] 8 is a diagram showing examples of intermittent sound patterns according to the facing relationship, which includes, for example, crossing from starboard, crossing from port, sailing against the current, overtaking, and being overtaken.

[0051] In the case of "crossing from starboard", i.e. when another ship crosses the course of your ship from starboard, a mode in which the gathering period includes three intermittent sounds (three consecutive sounds) is applied.

[0052] In the case of "crossing from the port side," i.e., when another ship crosses the course of your ship from the port side, a mode in which two intermittent sounds are included in the gathering period (two continuous sounds) is applied.

[0053] In the cases of "counter sailing", "overtaking" and "being overtaken", one intermittent sound mode (single sound) is applied during the gathering period.

[0054] In this embodiment, in the cases of "crossing from starboard" and "crossing from port", which are crossing relationships, the number of intermittent sounds included in the collection period of the intermittent sound pattern is increased compared to the cases of "against course", "overtaking", and "being overtaken", which are not crossing relationships.

[0055] Furthermore, in the case of "crossing from starboard", the number of intermittent sounds included in the collection period of the intermittent sound pattern is increased compared to the case of "crossing from port".

[0056] Note that changing the mode of the intermittent sound pattern is not limited to changing the number of intermittent sounds included in the collection period. For example, the duration of the intermittent sound itself may be changed, or the intensity of the intermittent sound may be changed.

[0057] According to the embodiment described above, the pattern generation unit 12 generates an intermittent sound pattern with a period corresponding to the risk value, which makes it easier for the user to grasp changes in the risk situation. In particular, the pattern generation unit 12 shortens the period of the intermittent sound pattern as the risk value increases, which makes it easier for the user to grasp that the risk of a collision has increased.

[0058] Furthermore, according to the embodiment, when changing the period of the intermittent sound pattern, the pattern generation unit 12 places the first intermittent sound when the elapsed time from the last intermittent sound immediately before the change reaches the changed period, thereby preventing the user from recognizing the pattern as having a period shorter than the original period.

[0059] Furthermore, according to the embodiment, the pattern generating unit 12 changes the manner of the intermittent sound pattern depending on the matched relationship, so that the user can easily grasp not only the change in the risk situation but also the matched relationship.

[0060] Specifically, when the own ship and the other ship are in a crossing relationship, the pattern generation unit 12 increases the number of intermittent sounds included in the collection period of the intermittent sound pattern compared to when the own ship and the other ship are not in a crossing relationship, so that the user can easily understand high-risk crossing relationships.

[0061] In addition, when another ship crosses the ship's course from the starboard side, the pattern generation unit 12 increases the number of intermittent sounds included in the collection period of the intermittent sound pattern compared to when the other ship crosses the ship's course from the port side, so that the user can easily recognize that the ship is an giving way ship.

[0062] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made by those skilled in the art. [Explanation of symbols]

[0063] 1 Information processing device, 2 Display unit, 3 Radar, 4 AIS, 5 GNSS receiver, 6 Gyrocompass, 7 ECDIS, 8 Alarm sound generation unit, 11 Risk value calculation unit, 12 Pattern generation unit, 13 Matching determination unit, 100 Ship monitoring system

Claims

1. a first data generation unit that generates first vessel data representing the position and velocity of the first vessel; a second data generation unit that generates second vessel data representing the position and velocity of the second vessel; a risk value calculation unit that calculates a risk value representing a risk of collision between the first vessel and the second vessel based on the first vessel data and the second vessel data; a pattern generation unit that generates an intermittent sound pattern having a period corresponding to the risk value; an alarm sound generator that generates an alarm sound according to the intermittent sound pattern; Equipped with When changing the period of the intermittent sound pattern from a first period to a second period, the pattern generation unit places a first intermittent sound of the second period when the elapsed time from the intermittent sound immediately before the change reaches the second period. Ship monitoring system.

2. the pattern generation unit shortens the period of the intermittent sound pattern as the risk value increases, The vessel monitoring system of claim 1 .

3. a match determination unit that determines a match relationship between the first vessel and the second vessel based on the first vessel data and the second vessel data, the pattern generating unit changes the manner of the intermittent sound pattern in accordance with the matching relationship.

3. A vessel monitoring system according to claim 1 or 2.

4. The intermittent sound pattern includes, in one cycle, a collection period in which one or more intermittent sounds are collected, and a silent period in which no intermittent sound is included, the pattern generation unit changes the number of intermittent sounds included in the set period of the intermittent sound pattern according to the matching relationship. The vessel monitoring system according to claim 3 .

5. the pattern generation unit increases the number of intermittent sounds included in the collection period of the intermittent sound pattern when the first ship and the second ship are in a crossing relationship compared to when the first ship and the second ship are not in a crossing relationship; 5. A vessel monitoring system according to claim 4.

6. the pattern generation unit increases the number of intermittent sounds included in the collection period of the intermittent sound pattern when the second vessel crosses the course of the first vessel from the starboard side compared to when the second vessel crosses the course of the first vessel from the port side; 6. A vessel monitoring system according to claim 4 or 5.

7. the first data generation unit is mounted on the first vessel and includes a GNSS (Global Navigation Satellite System) receiver that detects the position of the first vessel based on radio waves received from a GNSS; 7. A vessel monitoring system according to any one of claims 1 to 6.

8. the second data generation unit includes a radar mounted on the first vessel and configured to detect the position and speed of the second vessel from echo data generated by receiving reflected waves of radio waves emitted around the first vessel; 8. A vessel monitoring system according to any one of claims 1 to 7.

9. By a computer, a first data generation unit generating first vessel data representing the position and velocity of the first vessel; a second data generation unit generating second vessel data representing the position and velocity of the second vessel; calculating a risk value representing a risk of collision between the first vessel and the second vessel based on the first vessel data and the second vessel data; generating an intermittent sound pattern having a period corresponding to the risk value; sounding an alarm in accordance with the intermittent sound pattern; A vessel monitoring method, comprising: When the period of the intermittent sound pattern is changed from a first period to a second period, the first intermittent sound of the second period is placed when the elapsed time from the intermittent sound immediately before the change reaches the second period. Ship monitoring method.

10. a risk value calculation unit that calculates a risk value that represents a risk of collision between the first vessel and the second vessel based on first vessel data that represents the position and velocity of the first vessel and second vessel data that represents the position and velocity of the second vessel; a pattern generation unit that generates an intermittent sound pattern having a period corresponding to the risk value; an alarm sound generator that generates an alarm sound according to the intermittent sound pattern; Equipped with When changing the period of the intermittent sound pattern from a first period to a second period, the pattern generation unit places a first intermittent sound of the second period when the elapsed time from the intermittent sound immediately before the change reaches the second period. Information processing device.

11. calculating a risk value representing a risk of collision between the first vessel and the second vessel based on first vessel data representing a position and a velocity of the first vessel and second vessel data representing a position and a velocity of the second vessel; generating an intermittent sound pattern having a period corresponding to the risk value; and issuing an alarm sound in accordance with the intermittent sound pattern; on the computer, When the period of the intermittent sound pattern is changed from a first period to a second period, the first intermittent sound of the second period is placed when the elapsed time from the intermittent sound immediately before the change reaches the second period. program.

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