Wave transmission control device, aquatic organism guiding device, and wave transmission control method

Abstract

A wave transmission control device (2) controls a wave transmitter (300) to form a sound field in water, wherein the wave transmission control device (2) has: a judging section (20) that, when detection information is input from a sensor that detects a living thing in water, judges characteristics of the living thing and a distribution state of each of the characteristics using the detection information; a sound selecting section (30) that refers to a database (200) that associates characteristics of a living thing and sound information, and acquires sound information corresponding to the characteristics judged by the judging section (20); and a wave transmission control section (50) that decides an output condition of sound in such a manner that the distribution state judged by the judging section becomes a set distribution state of each of the characteristics accepted before processing starts, and causes the wave transmitter (300) to output sound based on the sound information acquired by the sound selecting section (30) using the output condition.

Description

Technical Field

[0001] This invention relates to a wave transmission control device that outputs sound waves for moving organisms in water. Background Technology

[0002] Previously, techniques for moving aquatic organisms (hereinafter referred to as "aquatic organisms") were known. For example, Patent Document 1 discloses a method for capturing crustaceans by moving a group of crustaceans in the sea. Specifically, when a group of crustaceans swimming in the sea is detected by a fish school detector, a sound wave generator is positioned in the sea to surround the group. While moving the group, the sound wave generator detects the position of the group and emits sound sequentially from the sound wave generator installed below the group to the sound wave generator above, causing the group to move towards the sea surface. As a result, the crustaceans move sequentially from the bottom to the top of the sea within the area surrounded by the sound wave generator.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 52-016385 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, in the prior art, there is a problem that when there are many aquatic organisms with different characteristics mixed in the water, other aquatic organisms may be guided along with the aquatic organism that is to be guided.

[0008] When the crustacean planktonic capture method described in Patent Document 1 is applied to a situation where various aquatic organisms with different characteristics are mixed together, it is impossible to distinguish and guide the aquatic organisms, and the above-mentioned problems still cannot be solved.

[0009] The present invention was made to solve the above-mentioned problems, and its purpose is to provide a wave transmission control device that can guide aquatic organisms according to each characteristic, even when multiple organisms with different characteristics are mixed in the water.

[0010] Methods for solving problems

[0011] The wave transmission control device of the present invention controls a wave transmitter to form a sound field in water, wherein the wave transmission control device has:

[0012] The judgment unit, when receiving detection information from the sensor that detects organisms in the water, uses the detection information to determine the characteristics of the organisms and the distribution state of each characteristic;

[0013] The sound selection unit uses a database that associates biological characteristics with sound information to obtain sound information corresponding to the characteristics determined by the judgment unit; and

[0014] The wave transmission control unit determines the sound output conditions in such a way that the distribution state determined from the judgment unit becomes the set distribution state of each feature accepted before the start of processing, and uses the output conditions to make the wave transmitter output sound based on the sound information obtained by the sound selection unit.

[0015] Invention Effects

[0016] According to the present invention, due to the configuration described above, it achieves the effect of providing a wave transmission control device that can differentiate and guide aquatic organisms according to each feature. Attached Figure Description

[0017] [ Figure 1 [Illustration 1] is a diagram showing an example of the structure of the underwater biological guiding device and wave transmission control device according to Embodiment 1.

[0018] [ Figure 2 [Illustration 1] is a diagram showing an example of information stored in the configuration storage unit.

[0019] [ Figure 3 [This is a graphical representation of an example of the distribution state set in a wave transmission control device.]

[0020] [ Figure 4 [ ] is a diagram showing the structure of the judgment unit in the wave transmission control device.

[0021] [ Figure 5 [Image] is an example of information stored in a database used in an aquatic organism guidance device.

[0022] [ Figure 6 [ ] is a diagram showing the structure of the wave transmission control unit in the wave transmission control device.

[0023] [ Figure 7 [Image 1] is a diagram showing the state of a wave transmitter transmitting a wave, controlled by a wave transmission control device.

[0024] [ Figure 8 [Image 1] is a second image showing the state of a wave transmitter transmitting a wave, controlled by a wave transmission control device.

[0025] [ Figure 9 ] Figure 9 A and Figure 9 B is a diagram showing the hardware structure of the underwater biological guidance device and wave transmission control device according to Embodiment 1.

[0026] [ Figure 10[ ] is a flowchart illustrating the processing of the wave transmission control device.

[0027] [ Figure 11 [] is a flowchart illustrating the processing in the decision-making section.

[0028] [ Figure 12 [ ] is a flowchart illustrating the processing in the wave transmission control unit.

[0029] [ Figure 13 The first image shows a wave transmitter that sends waves, controlled by a wave transmission control device, to guide aquatic organisms.

[0030] [ Figure 14 The second image shows a wave transmitter that sends waves, controlled by a wave transmission control device, to guide aquatic organisms.

[0031] [ Figure 15 The third image shows a wave transmitter that sends waves, controlled by a wave transmission control device, to guide aquatic organisms.

[0032] [ Figure 16 The fourth image shows aquatic organisms guided by waves transmitted by a wave transmitter controlled by a wave transmission control device. Detailed Implementation

[0033] Hereinafter, the aquatic organism guiding device and wave transmission control device of the present invention will be described with reference to the accompanying drawings.

[0034] In this invention, organisms existing in water are referred to as aquatic organisms. Aquatic organisms encompass all organisms existing in water. Furthermore, water includes the seabed.

[0035] Furthermore, in this invention, sound or sound waves are used. Sound or sound waves include frequencies below the human audible range and frequencies above the human audible range (ultrasound).

[0036] Implementation Method 1

[0037] Figure 1 This is a diagram illustrating an example of the structure of the aquatic organism guiding device and wave transmission control device of the present invention.

[0038] The aquatic organism guiding device 1 is a device that guides aquatic organisms in a desired distribution according to each characteristic of the organism. In the case of a mixture of various organisms with different characteristics in the water, the aquatic organism guiding device 1 uses at least one type of fish as the guiding object and distinguishes it from other types of fish by using sound guidance.

[0039] For example, suppose that the aquatic organism guiding device 1 is used to guide a type of fish toward the fishing net when fishing in the ocean.

[0040] In addition, for example, suppose that the aquatic organism guiding device 1 is used to guide adult fish toward the fishing net, so that juvenile fish are kept away from the fishing net and the juvenile fish are not overcaught.

[0041] Furthermore, for example, assuming that the aquatic organism guiding device 1 is used for feeding in a fish farm, after causing larger fish with a body length above a threshold to avoid the feeding location, smaller fish with a body length below the threshold are fed.

[0042] Furthermore, for example, suppose that the aquatic organism guiding device 1 is used to distinguish and guide specific fish in the tank of an aquarium.

[0043] Figure 1 The aquatic organism guiding device 1 shown has a wave transmission control device 2, a sensor unit 100, a sound information database 200, and a wave transmitter 300.

[0044] The wave transmission control device 2, sensor unit 100, sound information database 200 and wave transmitter 300 are connected in a communicable manner.

[0045] The wave transmission control device 2 uses detection information from the sensor unit 100 and distribution information indicating the desired distribution state, refers to the sound information database 200 to select sound information, and determines the sound output conditions. Using these output conditions, it controls the wave transmitter 300 to create a sound field in the water. Details of the wave transmission control device 2 and the sound information database 200 will be described later.

[0046] The sensor unit 100 detects aquatic life and outputs detection information. The sensor unit 100 may use, for example, sound waves, radio waves, or light to detect aquatic life and output detection information. Alternatively, the sensor unit 100 may use, for example, images captured by a camera to detect aquatic life and output detection information. Alternatively, the sensor unit 100 may also use two or more of the following methods to detect aquatic life and output detection information: sound waves, radio waves, light, and images captured by a camera.

[0047] The wave transmitter 300 is disposed in water. The wave transmitter 300 may be installed, for example, on the hull of a ship. Alternatively, the wave transmitter 300 may be installed, for example, on a structure disposed in the ocean, river, or tank. The structures include not only those fixed to the shore or seabed, but also those floating on the water.

[0048] The wave transmitter 300 outputs directional sound waves into the water, forming a sound field in the water. The wave transmitter 300 is, for example, a loudspeaker, specifically an underwater loudspeaker, a super-directional loudspeaker, an ultrasonic loudspeaker, or an ultrasonic sensor. Furthermore, the wave transmitter 300 can also be a loudspeaker array having any one of the above-mentioned loudspeakers and configured in an array. That is, the wave transmitter has, for example, one or more loudspeakers.

[0049] The wave transmitter 300 can also output directional sound waves in multiple different directions in the water.

[0050] In addition, the wave transmitter 300 may also have a drive unit (not shown) that changes the direction of the wave transmitted by the wave transmitter 300 according to the output direction included in the output conditions determined by the wave transmission control unit 50.

[0051] In this case, when the drive unit receives a control signal from the wave transmission control unit 50, it mechanically changes the direction of the wave transmitter 300 according to the output direction indicated by the control signal.

[0052] Therefore, in water where the wave transmitter 300 can transmit waves, the wave transmission control unit 50 can enable the wave transmitter 300 to further form a sound field in any direction and any range in the water.

[0053] Furthermore, when multiple wave transmitters 300 are present and positioned at different locations, the wave transmission control unit 50 controls the amplitude and phase of the sound output by each wave transmitter 300. Thus, in water where the wave transmitters 300 can transmit waves, a sound field can be formed by the wave transmitters 300 in any direction and within any range of the water.

[0054] This section describes the details of the wave transmission control device 2 and the sound information database 200.

[0055] Figure 1 The wave transmission control device 2 shown has a setting storage unit 10, a judgment unit 20, a sound selection unit 30, and a wave transmission control unit 50.

[0056] Furthermore, the wave transmission control device 2 has a control unit (not shown). The control unit, for the overall processing of the wave transmission control device 2, issues commands to start, continue, and end the processing based on information obtained from the internal and external parts of the wave transmission control device 2. For example, whenever the wave transmission control device 2 performs control over the wave transmitter 300, the control unit determines whether to terminate the wave transmission control. If the control unit determines to terminate the wave transmission control, it terminates the processing of the wave transmission control device 2. If the control unit determines not to terminate the wave transmission control, it instructs the processing related to wave transmission control to be repeated from the beginning. Alternatively, when the processing related to wave transmission control is repeated, the control unit may instruct the omission of the processing of the sound selection unit 30 from the second processing onwards.

[0057] The setting storage unit 10 stores the distribution state of each feature that has been preset. Specifically, before the wave transmission control device 2 starts the wave transmission control processing for the wave transmitter 300, the setting storage unit 10 stores information representing the characteristics of aquatic organisms and information representing the distribution state of aquatic organisms in the water.

[0058] Information describing the characteristics of aquatic organisms and their distribution in the water is information set by the user, for example, before the wave transmission control device 2 begins control processing. In other words, the information stored in the setting storage unit 10 represents the distribution of each aquatic organism (the target organism) that the user wants to guide in the water. This information only needs to be received and stored at least before the wave transmission control device 2 begins control.

[0059] Furthermore, the information set in the storage unit 10 is explained.

[0060] Figure 2 This diagram shows an example of the information stored in the setting storage unit 10.

[0061] The setting storage unit 10 stores identification information 11, feature information 12, and distribution information 13 in a related manner. The setting storage unit 10 may also store multiple sets of identification information 11, feature information 12, and distribution information 13.

[0062] When multiple sets of feature information 12 and distribution information 13 are stored in the setting storage unit 10, the identification information 11 in the setting storage unit 10 is information used to identify combinations of feature information 12 and distribution information 13. The identification information 11 is, for example, alphanumeric characters that are not repeated for each combination of feature information 12 and distribution information 13.

[0063] The feature information 12 in the storage unit 10 is information representing the characteristics of a pre-defined aquatic organism. The feature information 12 is, for example, at least one of information representing the species of the aquatic organism and information representing the size of the aquatic organism.

[0064] Distribution information 13 represents information indicating the distribution status of aquatic organisms in the water. For example, distribution information 13 represents at least one of the direction of a region in the water relative to the location of the wave transmitter 300, the distance to that region, and the location of that region. Furthermore, distribution information 13 may also include the area of ​​that region.

[0065] In the following description, the identification information 11 set in the setting storage unit 10 is sometimes referred to as setting identification information 11, similarly, the feature information 12 is sometimes referred to as setting feature information 12, and the distribution information 13 is sometimes referred to as setting distribution information 13. In addition, the distribution state represented by the setting distribution information 13 is sometimes referred to as setting distribution state.

[0066] Furthermore, in the following description, the case of the direction of the area in the water based on the setting position of the wave transmitter 300 is used as an example, but the present invention is not limited to this case.

[0067] Furthermore, if only one set of information is set in the setting storage unit 10, setting identification information 11 is not necessary.

[0068] Figure 3 This is a graphical representation of an example of the distribution state set in the wave transmission control device 2.

[0069] For example, such as Figure 3 As shown, the setting storage unit 10 stores setting distribution information 13 indicating the presence of fish 510a in the region 13a to the right front of the wave transmitter, and setting distribution information 13 indicating the presence of fish 510b in the region 13b to the left front of the wave transmitter. Here, it is assumed that fish 510a and fish 510b are different kinds of fish, and that their audible sounds are different, or that their preferred sounds and avoidance sounds are different.

[0070] When detection information is input from the sensor unit 100 that detects organisms in the water, the determination unit 20 uses the detection information to determine the characteristics of the organisms in the water and the distribution state of each characteristic of the organisms. The determination unit 20 outputs feature information representing the characteristics of the organisms in the water and distribution information representing the distribution state of each characteristic of the organisms.

[0071] Figure 4 This is a diagram showing the structure of the judgment unit 20 in the wave transmission control device 2.

[0072] exist Figure 4 The structure of the judgment unit 20 and its relationship with the surrounding structural units are shown in the figure.

[0073] Figure 4 The judgment unit 20 shown has a feature judgment unit 21, a distribution judgment unit 22 and a guidance judgment unit 23.

[0074] The feature determination unit 21 uses the detection information received from the sensor unit 100 to determine the characteristics of the aquatic organisms detected by the sensor unit 100. The characteristics of the aquatic organisms include, for example, the species, size, or growth rate of the aquatic organism. The technique of determining the species, size, or growth rate of the aquatic organism using the detection information from the sensor unit 100 can be implemented using existing technology. Therefore, a detailed description is omitted here.

[0075] The feature determination unit 21 outputs feature information representing the determined features. Hereinafter, the feature information output by the feature determination unit 21 will sometimes be referred to as the determined feature information.

[0076] The distribution determination unit 22 uses the detection information received from the sensor unit 100 to determine the distribution state of aquatic organisms detected by the sensor unit 100. The distribution determination unit 22 outputs distribution information representing the determined distribution state. The distribution information determined by the distribution determination unit 22 represents the area where aquatic organisms currently exist. Specifically, the distribution information determined by the distribution determination unit 22 represents at least one of the direction of the area in the water relative to the location of the wave transmitter 300, the distance to that area, and the location of that area. In addition, it may also include information representing the area of ​​that region. Hereinafter, the distribution information output by the distribution determination unit 22 will sometimes be referred to as determined distribution information.

[0077] The guidance and judgment unit 23 determines whether to perform wave transmission control for guiding aquatic organisms.

[0078] Specifically, the guidance judgment unit 23 refers to the setting storage unit 10 and determines whether the judgment feature information received from the feature judgment unit 21 is consistent with the setting feature information 12. Therefore, if the judgment unit 23 determines that they are consistent, it can determine that the aquatic organism detected by the sensor unit 100 is the aquatic organism that is the target of guidance.

[0079] Furthermore, the guidance judgment unit 23 refers to the setting storage unit 10 and determines whether the judgment distribution information received from the distribution judgment unit 22 is consistent with the setting distribution information 13. Thus, if the determination is consistent, the guidance judgment unit 23 can determine to guide the aquatic organisms by performing wave transmission control.

[0080] When the guidance and judgment unit 23 determines that wave transmission control should be performed, it outputs judgment characteristic information and judgment distribution information.

[0081] In addition, the guidance judgment unit 23 can also compare the judgment distribution information with the set distribution information 13. If it is determined that the difference is within the threshold, it is determined that no wave transmission control will be performed. If it is determined that the difference exceeds the threshold, it is determined that wave transmission control will be performed.

[0082] The sound selection unit 30 refers to a sound information database 200 that associates the characteristics and sound information of aquatic organisms, and obtains sound information corresponding to the characteristics determined by the judgment unit 20. Specifically, the sound selection unit 30 refers to the sound information database 200, retrieves feature information that matches the judged feature information, selects and obtains the sound information associated with the retrieved feature information. The sound selection unit 30 outputs the obtained sound information.

[0083] Here, we will explain the sound information database 200.

[0084] Figure 5An example of information stored in the sound information database 200 used in the aquatic organism guidance device 1 is shown.

[0085] exist Figure 5 In the middle, the voice information database 200 stores the identification information 201, feature information 202 and voice information 203 together.

[0086] The identification information 201 in the voice information database 200 is information used to identify the combination of feature information 202 and voice information 203. The identification information 201 consists, for example, of alphanumeric strings that are not repeated according to a pre-defined set of information.

[0087] The feature information 202 in the sound information database 200 is information representing the characteristics of aquatic organisms. Feature information 202 may include, for example, species information indicating the type of aquatic organism and size information indicating its size. Specifically, species information may be the name of the fish, such as "sardine" or "bream," and size information may be a body length such as "10cm" or information based on body length indicating "adult" or "juvenile." Furthermore, feature information 202 may also be a value representing the growth rate of the aquatic organism. Additionally, feature information 202 may be a combination of species information and size information.

[0088] The sound information 203 in the sound information database 200 represents audible sound information corresponding to the auditory characteristics of each aquatic organism. Sound information 203 may include, for example, information representing frequency bands and information representing wave transmission patterns indicating how sound intensity changes over time.

[0089] Here, we will use fish as an example to illustrate the hearing of aquatic creatures. Fish possess auditory characteristics; for instance, the audible range varies depending on the species and size of the fish. That is, there are audible sounds that correspond to the species and size of the fish.

[0090] Within the fish's audible range, there are preferred and repelling sounds that correspond to the fish's breeding environment.

[0091] For example, the sounds made when hunting for prey in a natural environment like the ocean are sounds of attraction, while the calls made when predators are active are sounds of repulsion.

[0092] Furthermore, in a breeding environment such as a fish farm, the feeding sound produced when the feeder is operating is a preferred sound, while the sound intentionally taught to be avoided by the fish is a repulsion sound. As a method of intentionally teaching fish to avoid, there is a method that teaches them by repeatedly performing a series of processes that cause the water to vibrate immediately after a particular sound is produced, thereby causing the fish to move away from its current position.

[0093] Information representing such preferred and avoided sounds is set as sound information 203 in sound information database 200.

[0094] When the sound information 203 in the sound information database 200 contains both preferred and repelling sounds, sound type information is also assigned, which can identify whether a sound is preferred or repelling based on each combination of feature information 202 and sound information 203. When the sound type information determines the sound output conditions in the wave transmission control unit 50, it is processed, for example, as follows: if the sound type information indicates a preferred sound, the direction to which aquatic life is to be guided is determined as the output direction; if the sound type information indicates a repelling sound, the direction opposite to the direction to which aquatic life is to be guided is determined as the output direction.

[0095] Furthermore, when the sound information 203 includes both a preferred sound and a repelling sound, the preferred sound and the repelling sound can be used for processing that utilizes both sounds simultaneously. For example, if one wants to catch only a specific fish species A, the preferred sound of fish species A is selected, and the preferred sound of fish species A is output to the desired location, guiding the fish to the capture location. On the other hand, for aquatic creatures other than fish species A, the repelling sound of aquatic creatures other than fish species A is output to the location where the preferred sound of fish species A has been output, causing the aquatic creatures other than fish species A to move away from the capture location.

[0096] The sound information 203 in the sound information database 200 can be either a preferred sound or a repulsive sound.

[0097] In addition, Figure 1 In this context, the sound information database 200 is a structure present in the aquatic organism guiding device 1 and is disposed outside the wave transmitting control device 2, but it is not limited thereto. For example, the sound information database 200 may also be a database external to the aquatic organism guiding device 1, or it may be disposed inside the wave transmitting control device 2.

[0098] Furthermore, in this invention, a sound information database 200 is shown; however, the sound information database 200 may also be located in a cloud or other medium that the aquatic biological guidance device 1 can reference, or it may be a removable storage medium such as an SD card.

[0099] That is, the sound information database only needs to be connected to the wave transmission control device 2 in a communicable manner.

[0100] Figure 1 The wave transmission control unit 50 shown determines the sound output conditions in a way that guides the aquatic organisms to the area to be guided, and uses the output conditions to control the wave transmitter 300 to output sound.

[0101] Specifically, the wave transmission control unit 50 determines the sound output conditions in a manner that corresponds to the distribution state of each feature preset in the setting storage unit 10 (the distribution state shown in the setting distribution information), and causes the wave transmitter 300 to output sound based on the sound information obtained by the sound selection unit 30 in a manner that satisfies the determined output conditions.

[0102] Furthermore, the wave transmission control unit 50 repeatedly performs the following process until the distribution state determined by the judgment unit 20 becomes the distribution state shown by the set distribution information. The process is to determine the sound output conditions and, in a manner that satisfies the determined output conditions, cause the wave transmitter 300 to output sound based on the sound information obtained by the sound selection unit 30.

[0103] Figure 6 This is a diagram showing the structure of the wave transmission control unit 50 in the wave transmission control device 2.

[0104] exist Figure 6 The diagram shows the structure of the wave transmission control unit 50 and its relationship with the surrounding structural units.

[0105] Figure 6 The wave transmission control unit 50 shown includes a distribution estimation unit 51, an output direction determination unit 52, and a control signal generation unit 53. In this invention, the output direction determination unit 52 is an example of an output condition determination unit that determines the output conditions of the sound.

[0106] The distribution estimation unit 51 compares the distribution state determined by the judgment unit 20 with the distribution state shown in the set distribution information, and estimates the distribution state that is close to the distribution state shown in the set distribution information from the distribution state determined by the judgment unit 20.

[0107] Specifically, when the distribution estimation unit 51 receives the judgment feature information and the judgment distribution information from the judgment unit 20, it compares the judgment distribution information with the setting distribution information for each feature stored in the setting storage unit 10. The distribution estimation unit 51 estimates a distribution state that is close to the distribution state shown by the judgment distribution information.

[0108] Methods for estimating the distribution state that approximates the current distribution state to a pre-defined distribution state for each feature can be achieved, for example, using existing technologies such as AI (artificial intelligence). Furthermore, this can also be achieved, for example, by gradually decreasing the distance between the coordinates of two different distributions. Therefore, further details are omitted.

[0109] The distribution estimation unit 51 outputs distribution information representing the estimated distribution state. Specifically, the distribution information output by the distribution estimation unit 51 represents at least one of the direction of a region in the water relative to the location of the wave transmitter 300, the distance to that region, and the location of that region. In addition, it may also include information representing the area of ​​that region. Hereinafter, the distribution information output by the distribution estimation unit 51 will sometimes be referred to as estimated distribution information.

[0110] The output direction determination unit 52 determines the output direction of the sound in a manner that corresponds to the distribution state estimated by the distribution estimation unit 51.

[0111] Specifically, for example, when outputting a preferred sound, the output direction determination unit 52 determines the direction indicated by the estimated distribution information as the output direction. Furthermore, for example, when outputting an avoidance sound, the output direction determination unit 52 determines the direction opposite to the direction indicated by the estimated distribution information as the output direction for the region represented by the determination distribution information.

[0112] The output direction determination unit 52 outputs output direction information indicating the determined output direction.

[0113] Furthermore, when the distribution information indicates the direction, the output direction determination unit 52 only determines the direction of the output sound. However, it can be changed to an output condition determination unit that corresponds to the distribution state indicated by the distribution information.

[0114] For example, when the distribution information represents distance, the output direction determination unit 52 can be changed to an output intensity determination unit, and the output intensity determination unit can be configured to determine the intensity of the output sound.

[0115] Furthermore, for example, when the distribution information indicates the location, the output direction determination unit 52 can be changed to an output direction intensity determination unit, which can be configured to determine the direction of the output sound and the intensity of the output sound.

[0116] That is, the output condition determination unit can be any one of the output direction determination unit 52, the output intensity determination unit, and the output direction intensity determination unit.

[0117] Furthermore, for example, if the distribution information includes area, the degree of directivity when outputting sound can be determined in the output direction determination unit 52, the output intensity determination unit, or the output direction intensity determination unit, respectively.

[0118] Figure 7 This is a first image showing the state of wave transmission by the wave transmitter 300 controlled by the wave transmission control device 2.

[0119] Figure 8This is a second image showing the state of wave transmission by the wave transmitter 300 controlled by the wave transmission control device 2.

[0120] The output direction determination unit 52 in the wave transmission control unit 50 determines the output direction as follows, for example.

[0121] If the sound information obtained by the sound selection unit 30 is the preferred sound 311a of fish 510a and the preferred sound 311b of fish 510b, the output direction determination unit 52 determines, for example, based on the sound type information received from the sound selection unit 30, that the output sound is the preferred sound. Furthermore, as... Figure 7 As shown, the output direction determination unit 52 determines the output direction of the preferred sound 311a as the direction of region 13a, and determines the output direction of the preferred sound 311b as the direction of region 13b.

[0122] On the other hand, if the sound information obtained by the sound selection unit 30 is the avoidance sound 312a of fish 510a and the avoidance sound 312b of fish 510b, the output direction determination unit 52 determines, for example, based on the sound type information received from the sound selection unit 30, that the output sound is an avoidance sound. Furthermore, as... Figure 8 As shown, the output direction determination unit 52 determines the output direction of the avoidance sound 312a as the direction of region 13b, and determines the output direction of the avoidance sound 312b as the direction of region 13a.

[0123] The control signal generation unit 53 uses the output direction information received from the output direction determination unit 52 and the sound information received from the sound selection unit 30 to generate a control signal that causes the wave transmitter 300 to output sound based on the sound information obtained by the sound selection unit 30 in the output direction determined by the output direction determination unit 52. The control signal generation unit 53 outputs the generated control signal.

[0124] Figure 9 A, Figure 9 B is a diagram showing the hardware structure of the wave transmission control device 2 according to Embodiment 1.

[0125] In Embodiment 1, the functions of the judgment unit 20, the sound selection unit 30, and the wave transmission control unit 50 are implemented by the processing circuit 1001. That is, the wave transmission control device 2 has a processing circuit 1001, which is used to select and acquire sound information 203 corresponding to the characteristics of aquatic organisms, and use the acquired sound information 203 to perform wave transmission control to output sound from the wave transmitter 300 into the water to form a sound field in the water.

[0126] Processing circuit 1001 can be as follows Figure 9 A shows dedicated hardware, or as shown in Figure 1. Figure 9B shows the CPU (Central Processing Unit) 1005 that executes the program stored in memory 1006.

[0127] When the processing circuit is dedicated hardware, the processing circuit 1001 may be, for example, a single circuit, a composite circuit, a programmable processor, a parallel programmable processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof.

[0128] When the processing circuit 1001 is a CPU 1005, the functions of the judgment unit 20, the sound selection unit 30, and the wave transmission control unit 50 are implemented through software, firmware, or a combination of software and firmware. That is, the functions of the judgment unit 20, the sound selection unit 30, and the wave transmission control unit 50 are implemented by a processing circuit such as a CPU 1005 or a system LSI (Large-Scale Integration) that executes programs stored in an HDD (Hard Disk Drive) 1002 or an execution memory 1006. Furthermore, the programs stored in the HDD 1002 or the memory 1006 can also be described as programs that cause the computer to execute the processing sequence or method of the judgment unit 20, the sound selection unit 30, and the wave transmission control unit 50. Here, the memory 1006 is, for example, a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), magnetic disk, floppy disk, optical disk, high-density disk, mini disk, or DVD (Digital Versatile Disc).

[0129] Furthermore, the functions of the judgment unit 20, the sound selection unit 30, and the wave transmission control unit 50 can be partially implemented using dedicated hardware and partially implemented using software or firmware. For example, the sound selection unit 30 can be implemented using the processing circuit 1001, which is dedicated hardware, and the judgment unit 20, the sound selection unit 30, and the wave transmission control unit 50 can be implemented by the CPU 1005 reading and executing the program stored in the memory 1006.

[0130] In addition, the wave transmission control device 2 has an input interface device 1003 and an output interface device 1004 for communicating with the sensor unit 100, the sound information database 200 or the wave transmitter 300.

[0131] Next, the processing of the wave transmission control device 2 in Embodiment 1 will be explained.

[0132] Figure 10 This is a flowchart illustrating the processing of the wave transmission control device 2.

[0133] Figure 11 This is a flowchart illustrating the processing in the decision-making unit 20.

[0134] Figure 12 This is a flowchart illustrating the processing in the wave transmission control unit 50.

[0135] The wave transmission control device 2, for example, receives a start command from the user and starts processing when it receives detection information from the sensor unit 100.

[0136] When the judgment unit 20 obtains the detection information ( Figure 10 Step ST1) determines the characteristics of aquatic organisms and their distribution in the water. Figure 10 Step ST2 in the middle.

[0137] Specifically, in step ST2, for example, as Figure 11 As shown, the feature judgment unit 21 in the judgment unit 20 uses the detection information to judge the characteristics of aquatic organisms and outputs judgment feature information representing the judged characteristics. Figure 11 Step ST21 in the process. Furthermore, the distribution determination unit 22 in the determination unit 20 uses the detection information to determine the distribution state of aquatic organisms and outputs determination distribution information representing the determined distribution state. Figure 11 Step ST22 in the middle.

[0138] The guidance judgment unit 23 in the judgment unit 20 uses the judgment feature information and judgment distribution information output from the judgment unit 20, and refers to the setting storage unit 10 to determine whether to perform wave transmission control for guiding aquatic organisms. Figure 10Step ST3 in the process. If it is determined that no wave transmission control will be performed ( Figure 10 If step ST3 is "No", return to step ST1.

[0139] When the guidance and judgment unit 23 determines that wave transmission control should be performed ( Figure 10 In step ST3 ("Yes"), output the judgment feature information and the judgment distribution information.

[0140] When the sound selection unit 30 obtains the judgment feature information, it refers to the sound information database 200, retrieves feature information that matches the judgment feature information, selects and obtains the sound information associated with the retrieved feature information. Figure 10 (Step ST4 in the process). The sound selection unit 30 outputs the acquired sound information.

[0141] The wave transmission control unit 50 controls the wave transmitter 300 to determine the output direction of the sound in a manner that becomes a pre-set distribution state of each feature when receiving sound information from the sound selection unit 30, so that the wave transmitter 300 outputs sound based on the sound information obtained by the sound selection unit 30 in the determined output direction. Figure 10 Step ST5 in the middle.

[0142] Specifically, in step ST5, for example, as Figure 12 As shown, the distribution estimation unit 51 in the wave transmission control unit 50 compares the determined distribution information judged by the judgment unit 20 with the preset distribution information for each feature, and estimates the distribution state that is close to the preset distribution state for each feature from the distribution state judged by the judgment unit 20. Figure 12 Step ST51 in the middle.

[0143] Next, the output direction determination unit 52 in the wave transmission control unit 50 determines the output direction of the sound in a manner that corresponds to the distribution state estimated by the distribution estimation unit 51. Figure 12 (Step ST52 in the text). Furthermore, if the sound information database 200 contains both preferred and disliked sounds, in step ST52, the output direction determination unit 52 determines the output direction of the sound based on the type of sound information obtained by the sound selection unit 30.

[0144] The output direction determination unit 52 outputs output direction information indicating the determined output direction.

[0145] Next, the control signal generation unit 53 uses the output direction information received from the output direction determination unit 52 and the sound information received from the sound selection unit 30 to generate a control signal that causes the wave transmitter 300 to output sound based on the sound information obtained by the sound selection unit 30 in the output direction determined by the output direction determination unit 52. The control signal generation unit 53 outputs the generated control signal. Figure 12 Step ST53 in the middle.

[0146] The control unit (not shown) in the wave transmission control device 2 determines whether to terminate wave transmission control. Specifically, the control unit uses, for example, judgment distribution information, setting distribution information 13, and estimated distribution information to determine whether the current distribution state is consistent with the distribution state shown in the setting distribution information 13.

[0147] The control unit determines whether to terminate the wave transmission control based on the judgment result. If the distribution state is determined to be consistent, the wave transmission control is terminated. Figure 10 Step ST6 "Yes" in the process ends the processing. Figure 10 (End of process). The control unit does not terminate wave transmission control if it determines that the distribution state is inconsistent. Figure 10 Step ST6 ("No") indicates that the processing should be repeated starting from the processing in step ST1.

[0148] Additionally, for example, if the difference between the current distribution state and the distribution state shown in the set distribution information 13 is within a threshold, the control unit may also determine to terminate the wave transmission control.

[0149] Furthermore, in the above processing of the control unit, the current distribution state can be estimated using the estimated distribution information, or the judgment distribution information can be obtained based on the newly acquired detection information.

[0150] Next, the image of guiding aquatic organisms using the aquatic organism guiding device and wave transmission control device of Embodiment 1 will be described.

[0151] Figure 13 The first image shows a wave transmitter 300, controlled by wave transmission control device 2, used to guide aquatic organisms by transmitting waves.

[0152] Assume that the setting storage unit 10 stores information indicating that the fish 510a is concentrated in the front right of the wave transmitter 300. Figure 3 The distribution information 13 is set for the distribution state of the area 13a shown.

[0153] The wave transmitter outputs the preferred sound 311a to the area in front of the right of the wave transmitter 300 according to the control signal received from the wave transmission control unit 50, thereby forming a sound field for guiding the fish 510a in the area in front of the right of the wave transmitter 300.

[0154] By forming a sound field 311a for the preferred sound of fish 510a in region 13a, fish 510a is guided and moved toward the sound field 311a as shown by arrow A.

[0155] On the other hand, the preferred sound 311a is different from the audible sound of fish 510b, or it is different from the preferred sound of fish 510b. Therefore, fish 510b does not move.

[0156] Figure 14 The second image shows a wave transmitter 300, controlled by wave transmission control device 2, used to guide aquatic organisms by transmitting waves.

[0157] Assume that the setting storage unit 10 stores information indicating that the fish 510a is concentrated in the left front of the wave transmitter 300. Figure 3 The distribution information 13 shows the distribution status of region 13b.

[0158] The wave transmitter 300 outputs a deterrent sound 312a to the area in front of the right of the wave transmitter 300 according to the control signal received from the wave transmission control unit 50, forming a sound field in the area in front of the right of the wave transmitter 300 for the fish 510a to avoid.

[0159] By forming a sound field of avoidance sound 312 for fish 510a in the area to the right front of wave transmitter 300, fish 510a avoids the sound field of avoidance sound 312a and moves as shown by arrow B.

[0160] On the other hand, the avoidance sound 312a is different from the audible sound of the fish 510b, or different from the avoidance sound 312b of the fish 510b. Therefore, the fish 510b does not move.

[0161] Figure 15 The third image shows a wave transmitter 300, controlled by wave transmission control device 2, used to guide aquatic organisms by transmitting waves.

[0162] Figure 16 The fourth image shows a wave transmitter 300, controlled by wave transmission control device 2, used to guide aquatic organisms by transmitting waves.

[0163] Assume that the setting storage unit 10 stores information indicating that the fish 510a is concentrated in the front right of the wave transmitter 300. Figure 3 The distribution information 13 of the distribution state of the area 13a shown is set, and the information stored indicates that the fish 510b are concentrated in Figure 3 The distribution information 13 shows the distribution status of region 13b.

[0164] The wave transmitter outputs a preferred sound 311a to the area in front right of the wave transmitter 300 according to a control signal received from the wave transmission control unit 500, thus forming a sound field for guiding the fish 510a in the area in front right of the wave transmitter 300. Furthermore, the wave transmitter 300 outputs a preferred sound 311b to the area in front left of the wave transmitter 300, thus forming a sound field for guiding the fish 510b in the area in front left of the wave transmitter 300.

[0165] As a result, fish 510a moves to the area in front right of wave transmitter 300, and fish 510b moves to the area in front left of wave transmitter.

[0166] However, in a single wave transmission control, such as Figure 15 As shown, some of the fish 510a′ and some of the fish 510b′ sometimes do not move.

[0167] In contrast, such as Figure 10 As shown in the flowchart, by repeatedly controlling the wave transmission, the direction and range of the sound field formed in the water are changed, such as... Figure 16 As shown by arrows C and D, a portion of fish 510a and a portion of fish 510b can also be moved in a manner that corresponds to the distribution state shown in the set distribution information 13.

[0168] Furthermore, as described above, the wave transmission control device 2 moves the fish in the left-right direction relative to the wave transmitter 300 based on the direction of the sound output. However, it is not limited to this; it can also control the sound output intensity in the wave transmitter 300 based on the distance to the fish, causing the fish to move in the direction of distance from the wave transmitter 300 to the fish. In addition, the wave transmission control device 2 can also control both the sound output direction and the sound output intensity.

[0169] As described above, the wave transmission control device of the present invention controls a wave transmitter to form a sound field in water. The wave transmission control device includes: a determination unit that, when detection information is input from a sensor unit detecting organisms in the water, uses the detection information to determine the characteristics of the organism and the distribution state of each characteristic; a sound selection unit that, with reference to a database that associates the characteristics of the organism with sound information, obtains sound information corresponding to the characteristics determined by the determination unit; and a wave transmission control unit that determines sound output conditions in such a way that the distribution state determined by the determination unit becomes a set distribution state for each characteristic to be processed before the start of processing, and uses these output conditions to cause the wave transmitter to output sound based on the sound information obtained by the sound selection unit.

[0170] This results in a wave transmission control device that can guide aquatic organisms according to each characteristic.

[0171] In the wave transmission control device of the present invention, the wave transmission control unit further includes: a distribution estimation unit that compares the distribution state determined by the determination unit with a set distribution state and estimates a distribution state that is close to the set distribution state from the distribution state determined by the determination unit; and an output condition determination unit that determines the output conditions of the sound in a manner that becomes the distribution state estimated by the distribution estimation unit.

[0172] This results in a wave transmission control device that can guide aquatic organisms in stages.

[0173] In the wave transmission control device of the present invention, the wave transmission control unit repeatedly performs the following process until the distribution state determined by the determination unit becomes the set distribution state. The process is to determine the sound output condition and use the output condition to make the wave transmitter output sound based on the sound information obtained by the sound selection unit.

[0174] This results in a wave transmission control device that can reliably guide aquatic organisms.

[0175] In the wave transmission control device of the present invention, the characteristic of the organism is the species of the organism.

[0176] This results in a wave transmission control device that can provide guidance based on each species of aquatic organism.

[0177] In the wave transmission control device of the present invention, the characteristic of the organism is further defined as the size of the organism.

[0178] This results in a wave transmission control device that can provide guidance based on the size of each aquatic organism.

[0179] In the wave transmission control device of the present invention, the characteristics of the organism are the species and size of the organism.

[0180] This results in a wave transmission control device that can provide guidance based on each combination of aquatic organisms by species and size.

[0181] In the wave transmission control device of the present invention, the wave transmission control unit is further configured to cause the wave transmitter to output a sound preferred by the organism.

[0182] This results in a wave transmission control device that can guide aquatic organisms by introducing them with different preferred sounds according to each of their characteristics.

[0183] In the wave transmission control device of the present invention, the wave transmission control unit is further configured to cause the wave transmitter to output a biological repulsion sound.

[0184] This results in a wave transmission control device that can guide aquatic organisms away by using different repulsion sounds according to each of their characteristics.

[0185] In the wave transmission control device of the present invention, when the wave transmitter is capable of outputting different sounds in multiple output directions respectively, the wave transmission control unit is configured to cause the wave transmitter to output the preferred sound of the organism and the repulsion sound of the organism respectively.

[0186] This results in a wave transmission control device that can provide the following effect: by using both preferred and repelling sounds according to each characteristic of aquatic organisms, it is easier to distinguish and guide aquatic organisms.

[0187] The aquatic organism guidance device of the present invention comprises: a wave transmitter that forms a sound field in the water; a judgment unit that, when detection information is input from a sensor unit that detects organisms in the water, uses the detection information to determine the characteristics of the organisms and the distribution state of each characteristic; a sound selection unit that uses a database that associates the characteristic information of the organisms with the sound information to obtain sound information corresponding to the characteristics determined by the judgment unit; and a wave transmission control unit that determines the sound output conditions in such a way that the distribution state determined by the judgment unit becomes a set distribution state for each characteristic to be processed before the start of processing, and uses the output conditions to cause the wave transmitter to output sound based on the sound information obtained by the sound selection unit.

[0188] This results in an aquatic organism guidance device that can guide aquatic organisms according to each characteristic.

[0189] In the aquatic organism guiding device of the present invention, the wave transmission control unit is further configured to include: a distribution estimation unit that compares the distribution state determined by the judgment unit with a set distribution state and estimates a distribution state that is close to the set distribution state from the distribution state determined by the judgment unit; and an output condition determination unit that determines the sound output condition in a manner that becomes the distribution state estimated by the distribution estimation unit.

[0190] This results in an aquatic organism guiding device that provides phased guidance for aquatic life. Consequently, the aquatic organism guiding device easily guides aquatic organisms.

[0191] In the aquatic organism guiding device of the present invention, the wave transmission control unit is configured to repeatedly perform the following process until the distribution state determined by the determination unit becomes a set distribution state. The process is to determine the sound output conditions and use the output conditions to make the wave transmitter output sound based on the sound information obtained by the sound selection unit.

[0192] This results in an aquatic organism guiding device that can reliably guide aquatic life.

[0193] In the aquatic biological guidance device of the present invention, the wave transmitter is an underwater loudspeaker.

[0194] This results in an aquatic organism guidance device that can guide aquatic organisms according to each characteristic.

[0195] In the aquatic organism guiding device of the present invention, the wave transmitter is a super-directional loudspeaker.

[0196] This results in an aquatic organism guidance device that can guide aquatic organisms according to each characteristic.

[0197] In the aquatic organism guiding device of the present invention, the wave transmitter is a speaker array.

[0198] This results in an aquatic organism guidance device that can guide aquatic organisms according to each characteristic.

[0199] In the aquatic organism guiding device of the present invention, the wave transmitter has a driving unit that changes the direction of the wave transmitted by the wave transmitter according to the output conditions determined by the wave transmission control unit.

[0200] This provides the following effect for guiding aquatic organisms: in water where the wave transmitter can emit waves, it enables the wave transmitter to create a sound field in any direction and any range within the water.

[0201] In the wave transmission control method of the present invention, a wave transmitter is controlled to form a sound field in the water, wherein the wave transmission control method comprises the following steps:

[0202] In the judgment step, when detection information is input from the sensor unit that detects organisms in the water, the judgment unit uses the detection information to judge the characteristics of the organisms and the distribution state of each characteristic.

[0203] In the sound acquisition step, the sound selection unit uses a database that associates biological feature information and sound information to acquire sound information corresponding to the features determined by the judgment unit; and

[0204] In the wave transmission control step, the wave transmission control unit determines the sound output conditions in such a way that the distribution state determined from the judgment unit becomes the set distribution state of each feature accepted before the start of processing. Using the output conditions, the wave transmitter outputs sound based on the sound information obtained by the sound selection unit.

[0205] This results in a wave transmission control method that can differentiate and guide aquatic organisms according to each characteristic.

[0206] Furthermore, within the scope of its disclosure, the present invention can modify or omit any structural element in the embodiments.

[0207] Industrial availability

[0208] The wave transmission control device of the present invention can select a sound according to each characteristic of aquatic organisms and output the sound in a manner that satisfies the output conditions as the distribution state of each characteristic, thereby distinguishing and guiding aquatic organisms according to each characteristic. Therefore, it is suitable for use as an aquatic organism guiding device.

[0209] Label Explanation

[0210] 1: Aquatic organism guiding device; 2: Wave transmission control device; 10: Setting storage unit; 11: Identification information (setting identification information); 12: Feature information (setting feature information); 13: Distribution information (setting distribution information); 13a, 13b: Region; 20: Judgment unit; 21: Feature judgment unit; 22: Distribution judgment unit; 23: Guidance judgment unit; 30: Sound selection unit; 50: Wave transmission control unit; 51: Distribution estimation unit; 52: Output direction determination unit (an example of the output condition determination unit of the present invention); 53: Control signal generation unit. Components; 100: Sensor unit; 200: Sound information database; 201: Recognition information; 202: Feature information; 203: Sound information; 300: Wave transmitter; 311a, 311b: Preferred sound; 312a, 312b: Avoidance sound; 510a, 510a′, 510b, 510b′: Aquatic organisms; 1001: Processing circuit; 1002: HDD; 1003: Input interface device; 1004: Output interface device; 1005: CPU; 1006: Memory; 1007: HDD.

Claims

1. A wave transmission control device that controls a wave transmitter to create a sound field in water, wherein, The wave transmission control device has the following features: The judgment unit, when receiving detection information from the sensor that detects organisms in the water, uses the detection information to determine the characteristics of the organisms and the distribution status of the organisms in the water corresponding to each characteristic, the characteristics including the species, size and growth rate of the organisms in the water; A sound selection unit, referring to a database that associates biological characteristics with sound information, obtains sound information corresponding to the characteristics determined by the judgment unit; and The wave transmission control unit determines the sound output conditions in such a way that the distribution state determined from the judgment unit becomes a set distribution state for each feature received before processing begins. Using these output conditions, the wave transmitter outputs sound based on the sound information obtained by the sound selection unit. The wave transmission control unit causes the wave transmitter to output a preferred sound that is liked by the first aquatic organism and a repulsion sound that is different from the preferred sound and is avoided by the second aquatic organism.

2. The wave transmission control device according to claim 1, wherein, The wave transmission control unit has: The distribution estimation unit compares the distribution state determined by the determination unit with the set distribution state, and estimates a distribution state that is close to the set distribution state from the distribution state determined by the determination unit; as well as The output condition determination unit determines the output conditions of the sound in a manner that corresponds to the distribution state estimated by the distribution estimation unit.

3. The wave transmission control device according to claim 2, characterized in that, The wave transmission control unit repeatedly performs the following process until the distribution state determined by the judgment unit becomes the set distribution state: determining the sound output condition and using the output condition to make the wave transmitter output sound based on the sound information obtained by the sound selection unit.

4. The wave transmission control device according to any one of claims 1 to 3, characterized in that, When the wave transmitter is capable of outputting different sounds in multiple output directions, the wave transmission control unit causes the wave transmitter to output sounds that the organism prefers and sounds that the organism avoids.

5. An aquatic organism guiding device, wherein, This aquatic organism guiding device has the following features: A wave transmitter that creates a sound field in the water; The judgment unit, when receiving detection information from the sensor that detects organisms in the water, uses the detection information to determine the characteristics of the organisms and the distribution status of the organisms in the water corresponding to each characteristic, the characteristics including the species, size and growth rate of the organisms in the water; A sound selection unit uses a database that associates biological feature information with sound information to obtain sound information corresponding to the features determined by the judgment unit; and The wave transmission control unit determines the sound output conditions in such a way that the distribution state determined from the judgment unit becomes a set distribution state for each feature received before processing begins. Using these output conditions, the wave transmitter outputs sound based on the sound information obtained by the sound selection unit. The wave transmission control unit causes the wave transmitter to output a preferred sound that is liked by the first aquatic organism and a repulsion sound that is different from the preferred sound and is avoided by the second aquatic organism.

6. The aquatic organism guiding device according to claim 5, characterized in that, The wave transmission control unit has: The distribution estimation unit compares the distribution state determined by the determination unit with the set distribution state, and estimates a distribution state that is close to the set distribution state from the distribution state determined by the determination unit; as well as The output condition determination unit determines the output conditions of the sound in a manner that corresponds to the distribution state estimated by the distribution estimation unit.

7. The aquatic organism guiding device according to claim 6, characterized in that, The wave transmission control unit repeatedly performs the following process until the distribution state determined by the judgment unit becomes the set distribution state: determining the sound output condition and using the output condition to make the wave transmitter output sound based on the sound information obtained by the sound selection unit.

8. The aquatic organism guiding device according to any one of claims 5 to 7, characterized in that, The wave transmitter is an underwater loudspeaker.

9. The aquatic organism guiding device according to any one of claims 5 to 7, characterized in that, The wave transmitter is a super-directional loudspeaker.

10. The aquatic organism guiding device according to any one of claims 5 to 7, characterized in that, The wave transmitter is a speaker array.

11. The aquatic organism guiding device according to any one of claims 5 to 7, characterized in that, The wave transmitter has a driving unit that changes the direction of the wave transmitted by the wave transmitter according to the output conditions determined by the wave transmission control unit.

12. A wave transmission control method, wherein a wave transmitter is controlled to create a sound field in water, wherein, The wave transmission control method has the following steps: In the judgment step, when the sensor for detecting organisms in the water inputs detection information, the judgment unit uses the detection information to judge the characteristics of the organisms and the distribution status of the organisms in the water corresponding to each characteristic. The characteristics include the species, size and growth rate of the organisms in the water. In the sound selection step, the sound selection unit uses a database that links biological feature information and sound information to obtain sound information corresponding to the features determined by the judgment unit; and In the wave transmission control step, the wave transmission control unit determines the sound output conditions in such a way that the distribution state determined from the judgment unit becomes the set distribution state of each feature received before processing begins. Using these output conditions, the wave transmitter outputs sound based on the sound information obtained by the sound selection unit. The wave transmission control unit causes the wave transmitter to output a preferred sound that is liked by the first aquatic organism and a repulsion sound that is different from the preferred sound and is avoided by the second aquatic organism.

Images