JP3747308B2 - Live fish measurement device in fish tank - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an apparatus for measuring live fish, and is particularly used for automatic measurement of the number, length, and weight of live fish bred in a fish tank.
[0002]
[Prior art]
In the field of aquaculture where the fry are released into the ginger and regularly fed to the fry, the number and size of the fish in the ginger are not accurately grasped, so a lot of food is given. For this reason, there is a problem that the uneaten bait sinks and rots and pollutes the farm, or the uneaten bait itself increases the production cost as wasteful bait. Therefore, the number and size of the fish are measured by measuring the fish in the ginger using a net. Further, a live fish counting apparatus invented by the present inventor is disclosed in Japanese Patent Laid-Open No. 6-243111.
[0003]
[Problems to be solved]
However, the conventional eye measurement work is not only complicated, but also the work of crawling fish with a shark net is extremely hard work. In addition, fish caught in the seine net have problems such as being scratched and causing disease.
Further, in order to use the live fish counting apparatus of the present inventor, it is necessary to remodel an existing sacrifice, and there is a problem that the remodeling cost is high.
[0004]
The present invention was made in order to solve the above-mentioned conventional problems, and can automatically measure the number, length, and weight of fish in a fish tank that can breed live fish such as fish, and does not require modification even with existing fish It aims at providing the live fish measuring device in the fish tank which can be utilized for.
[0005]
[Means for Solving the Problems]
The live fish measuring device in the fish tank of the present invention can be inserted into the fish tank where the fish is bred, and the fish bred in this fish tank passes through the gap between the outer peripheral edge and the inner surface of the fish tank. Measurement that includes a moving element that is prevented from moving forward and backward in the fish tank and that has an opening through which the fish can pass without being superposed in a submerged portion, and a sensor that can detect the fish that passes through the opening. Means.
In addition, the frame material that constitutes the mover is a telescopic structure or other telescopic structure so that the outer shape of the mover and the inner diameter of the opening can be adjusted to an arbitrary size and the position of the opening is also constant. It is preferable that adjustment is possible within the range.
[0006]
[Action]
In the present invention, for example, when a fish passes through an opening formed in a submerged portion of a movable body submerged in a sacrificial cage, a sensor capable of detecting the fish detects the fish and sends the signal to the controller. When the controller converts the signal as the number of fish and length or weight and outputs the signal to an output device such as a printer, the output device displays the number of fish that passed through the opening and the length or weight as measured values. Fulfills its function.
[0007]
【Example】
Preferred embodiments of a live fish measuring apparatus in a fish tank according to the present invention will be described below with reference to the drawings. However, the present invention is not limited to these embodiments.
[0008]
[Example 1]
1 and 2 show a first embodiment of a live fish measuring device in a fish tank according to the present invention, which is a measuring device for flounder.
The feature of the present embodiment is that a fish that passes through a plurality of openings 1a that penetrates the lower part of the moving element 1 that is inserted substantially vertically into the water tank and that allows only one fish to pass through the vicinity of the openings 1a. It is in the point which enabled it to measure by the measurement means arrange | positioned in this.
[0009]
In FIG. 1, 1 is inserted substantially vertically into a water tank 20 where flounder is raised, and fish in the water tank 20 cannot pass through the gap between the outer peripheral edge and the inner surface of the water tank 20 as shown in FIG. 2. Thus, the movable element 1 is disposed so as to be able to advance and retreat in the water tank. The movable element 1 is attached to the frame material 2 and the frame member 2 connected to the outer peripheral edge portion and the outer peripheral edge portion at an appropriate position. And a plurality of openings 1a in the horizontal direction in the vicinity of the bottom surface of the water tank 20 (three in the figure). (Place) It is installed side by side.
[0010]
A measuring means 10 is attached in the vicinity of the opening 1a on the surface from which the fish 1 comes out (the left surface in the figure), and a CCD camera as a sensor for detecting fish passing through the opening 1a. The number of fish detected when 11 detects a flounder that passes through a passage through which only one flounder is composed of a backlight 12 and a guide member 4 made of a transparent material, and sends the information to the image processing device 13. ] And “body length” signals. The measuring means 10 is well known, and the CCD camera 11 is housed in a box made of a transparent material and having a watertight structure.
Further, the image processing device 13 and the controller 6 are connected by electric wires, and the controller 6 is connected to a printer 7 as an output device.
[0011]
A nozzle 5 is attached to the bottom surface of the water tank 20 of the moving element 1 and connected to a pump (not shown) through a tube, and discharges water in the water tank supplied from the pump toward the bottom surface of the water tank. It is.
[0012]
In the above configuration, the operation will be described with reference to FIG.
The method of pushing the fish into the opening 1a uses the fish's ability to avoid danger and moves the moving element to narrow the swimming space of the fish.
First, the mover 1 was inserted into and subsided from one side of the water tank 20 (the left wall of the water tank in the figure) by appropriate means so that fish would not enter between the mover 1 and the wall of the water tank 20. Thereafter, when the moving element 1 is moved toward the other wall facing the other by appropriate means (in the drawing, it is moved in the right direction), the moving element 1 approaching the water flow discharged from the nozzle 5 feels a sense of crisis. As shown in FIG. 1, the flounder moves away from the bottom and gradually becomes narrower, and as shown in FIG. 1, as shown in FIG. Moving.
[0013]
Subsequently, when the movable element 1 is moved between the movable element 1 and the right wall in the figure until there is no flounder, all the flounder in the water tank 20 moves to the adjacent chamber, and the number is automatically measured. The
[0014]
At this time, the CCD camera 11 as a sensor for detecting fish detects a flounder passing through the opening 1 a, and the signal is sent to the image processing device 13. When the image processing device 13 converts the signal as the “number” and “body length” of the flounder and sends it to the controller 6, the controller 6 outputs the information to the printer 7, and the printer 7 receives the number and the number. The body length is output as a measured value. (For example, the number and length of fish are printed on paper)
[0015]
The fish number and body length data input as described above is processed by the controller 6 and the printer 7 is necessary for production management such as the fish body length standard deviation, frequency distribution map, average body length, number of fish, etc. Information, preferable feed weight comments, output of comments recommending further separation as the length variation after separation increases, and connected to the controller 6 to face underwater and observe the prey status of fish food If the feeding timing, the number of times of feeding, the weight of the feed for each feeding, etc. are output in consideration of the information from the visual device that is not used, it can be used as a preferred production management tool.
[0016]
The frame member 2 has a telescopic structure, such as a telescopic structure, so that the outer shape of the moving element 1 and the inner diameter of the opening can be adjusted to an arbitrary size, and the position of the opening is also adjusted within a certain range. It is preferable if possible.
[0017]
[Example 2]
As can be seen in FIG. 3, the feature of this embodiment is that the movable element 1 is inserted into a net-shaped cage 21 where most of the lower part is submerged in the sea and a hamachi is raised. In the same manner as in the first embodiment, the fish 21 is sunk in the gap between the outer peripheral edge and the inner surface of the sacrificial bowl 21 so that the fish in the sacrificial bowl 21 cannot pass through. There is an opening 1a through which the hammers in the sacrifice 21 can pass only one by one in the center.
The same parts as those shown in FIG. 1 used in the description of the first embodiment are denoted by the same reference numerals, and redundant description is omitted here.
[0018]
Measuring means 10 is attached near the opening 1a on the surface of the moving element 1 on the side from which the fish comes out (the lower surface in the figure), and two CCDs as sensors for detecting fish passing through the opening 1a. The camera 11 is arranged orthogonal to a passage through which only one pair of hamachi composed of the backlight 12 and the guide member 4 made of a transparent material passes, and when information on the hamachi passing through this passage is detected, the information is processed. When it is sent to the device 13, it is converted into a signal of “number”, “length”, and “weight” of the detected fish. The measuring means 10 is well known, and the CCD camera 11 is housed in a box made of a transparent material and having a watertight structure.
Further, the image processing device 13 and the controller 6 are connected by electric wires, and the controller 6 is connected to a printer 7 as an output device.
[0019]
In the above configuration, the operation will be described with reference to FIGS. The operation of the present embodiment is the same as that of the first embodiment, and the method of pushing the fish into the opening 1a uses the fish's ability to avoid danger and moves the moving element to narrow the fish swimming space. .
First, after moving the slider 1 to the bottom of the sacrificial bowl 21 by appropriate means so as to prevent hamachi from entering between the bottom of the cage and the sacrificial bowl 21, the moving element 1 is raised toward the water surface by appropriate means. . A hamachi that feels a sense of crisis that the swimming space is gradually narrowed by the ascending mover 1 passes through the opening 1 a and moves to the seabed side adjacent chamber that is separated into compartments via the mover 1.
[0020]
At this time, the CCD camera 11 as a sensor for detecting fish detects a hamachi that passes through the opening 1 a and sends a signal to the image processing device 13. The image processing device 13 converts the signal into “number”, “length”, and “weight” of Hamachi and sends it to the controller 6. When the controller 6 outputs the information to the printer 7, the printer 7 The number, length and weight are output as measured values.
[0021]
Subsequently, when the mover 1 is raised until there is no hamachi between the mover 1 and the sea surface, all the hamachi in the sacrifice 21 are moved to the aforementioned seabed side adjacent room, and the number thereof is automatically measured.
[0022]
In the above embodiment, the number of openings 1a is one, but the present invention is not limited to this. That is, a plurality of openings may be provided. In this case, two CCD cameras orthogonal to the respective openings may be arranged and measured, and information from each camera may be collected in the controller 6. Thereby, there exists an effect which a measurement efficiency improves.
[0023]
[Example 3]
A feature of the present embodiment is that a measuring means using an ultrasonic sensor as a fish detection sensor is attached in the vicinity of the opening formed in the movable element inserted substantially vertically into the sacrifice and passes through the opening. The point is that the number and length of fish can be measured.
In this way, the backlight can be omitted, and the measurement can be performed at night.
[0023]
In FIG. 5, the movable element 1 similar to that of the second embodiment is inserted in a substantially vertical position in the middle of the sacrifice 21, and the gap between the edge of the movable element 1 and the inner surface of the sacrifice 21 is inserted into the fish in the sacrifice 21 Is arranged so that it cannot pass through.
In addition, fish that have phototaxis (the habit of gathering in light) such as horse mackerel, mackerel, sardines, and yellowtails are bred in the cage. Reference numeral 9 denotes a light shielding sheet.
A measuring means 30 is attached in the vicinity of the opening 1a on the surface from which the fish 1 comes out (the right side in the figure), and serves as a sensor for detecting fish passing through the opening 1a. The ultrasonic sensor 31 detects a fish that passes through a passage through which only one fish can pass through the cage, which is composed of a guide member 41 having a U-shaped cross section that is open at the top. When it is sent to the processing device 32, it is converted into a signal of “number” and “body length” of the detected fish. The measuring means 30 is a known one.
As in the previous embodiment, the image processing device 32 and the controller 6 are connected by an electric wire, and the controller 6 is connected to a printer 7 as an output device.
[0024]
The operation of the above configuration will be described with reference to FIG. The method of pushing the fish of the present embodiment into the opening 1a utilizes the phototaxis of the fish.
First, when a moving piece is inserted substantially vertically into the center of the sacrifice, the fish in the sacrifice is divided into two rooms on the left and right with the moving element as the boundary wall. Next, when the room where the measuring means is faced (the room on the right side of the figure) is covered with the light shielding sheet 9, it is irradiated with sunlight and moves to the bright left room through the opening 1a. After confirming that all the fish have moved to the left room, if the shading sheet 9 is put on the left room where the fish are gathering, this time, the fish passes through the opening 1a as described above and the right side is bright. Move to the room.
At this time, the sound wave irradiated by the ultrasonic sensor 31 as a sensor for detecting the fish hits the fish passing through the opening 1 a and the reflected sound wave is captured and the signal is sent to the image processing device 32. When the image processing device 32 converts the signal as the number of fish and the length of the fish and sends it to the controller 6, the number of fish and the length of the fish are output to the printer 7 via the controller 6 as described above.
[0025]
[Example 4]
As shown in FIG. 6, the handle 15 to the handle 15 is configured so that the fish passing through the opening through which only one fish in the cage can pass can be measured by the measuring means 10 disposed in the vicinity of the opening. The moving element 1 may be moved with the handle 15 extended. In this case, the gap between the member 17 that is allowed to advance and retreat along the wall of the sacrifice 21 and the inner wall of the sacrifice 21 is maintained, and the member 17 and the movable element 1 are flexible. You may make it the structure which can be connected with the net | network material 16, and each can advance and retreat in the sacrifice.
[0026]
【The invention's effect】
As described above, according to the live fish measuring apparatus in the fish tank according to the present invention, the fish is inserted one by one in the submerged portion of the moving element that is detachably inserted into the fish tank in which the fish is raised. When fish pass through openings that can only be passed row by row, the number and length or weight of the fish is automatically measured by the measuring means placed near the openings, allowing quantitative production management according to the growth of the fish. In addition, the human being is freed from complicated measurement work. In addition, it is no longer necessary to catch fish with nets, so you are free from hard work. Furthermore, there are practically excellent effects such as no scratches on the fish.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing a first embodiment of a live fish measuring apparatus in a fish tank of the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG.
FIG. 3 is a cross-sectional view of an essential part showing a second embodiment of the live fish measuring apparatus in the fish tank of the present invention.
4 is a view as seen from an arrow A in FIG. 2;
FIG. 5 is a cross-sectional view of an essential part showing a third embodiment of the live fish measuring apparatus in the fish tank of the present invention.
FIG. 6 is a plan view showing a fourth embodiment of the live fish measuring apparatus in the fish tank of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mover 1a Opening part 2 Frame material 3 Net | network material 4,41 Guide member 5 Nozzle 6 Controller 7 Printer
9 Light-shielding sheet 10 Measuring means 11 CCD camera 12 Backlight 13 Image processing device 20 Water tank 21 Sacrifice 30 Measuring means 31 Ultrasonic sensor 32 Image processing device

Claims (1)

It can be inserted into the fish tank where the fish is bred, and the fish bred in the fish tank cannot pass through the gap between the outer peripheral edge and the inner surface of the fish tank, and can move forward and backward in the fish tank. A fish tank comprising: a moving element in which an opening through which the fish can pass without being superposed is inserted in the submerged part; and a measuring means having a sensor capable of detecting the fish passing through the opening. Live fish measurement device

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