JPH065555B2 - Fry counter - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a fry counting device that counts fry grown by artificial hatching or the like while transferring them together with growing water.

[Prior art]

Fishery production in Japan used to depend on pelagic fisheries, offshore fisheries and coastal fisheries, but this is due to the establishment of economic zones in each country, regulation of operations within those zones, and rising operating costs. As a result, the management of the pelagic fishery is under pressure, and its productivity is declining year by year. Also, in the offshore and coastal fisheries, fish resources in the offshore and coastal waters are being depleted significantly due to overfishing due to innovations in fishing gear and fishing, and in addition to the emergence of many recreational boats. Based on these circumstances, so-called fisheries, which are so-called aquaculture businesses and increased production businesses, have been advocated, and aquaculture businesses that are relatively small in scale and that can be managed with human resources have been actively promoted. Up to. On the other hand, unlike the aquaculture business, the breeding business, so-called cultivated fishery, is carried out in an open system, so it is extremely large in scale and can be raised in nature after release. There is no need for management, and in recent years it has become possible to release a large amount of juvenile fish in combination with the improvement of the artificial hatching technology for multiple fish species and the establishment of a cultivation and fishery center for hatching and breeding.
In particular, salmon and trout have been released and the number of breeding and catching fish has been steadily increasing year by year. Furthermore, it is expected that the sessile fish species such as Thailand, flounder, and flounder will greatly contribute to the improvement of the catch productivity of coastal fisheries as the release of juvenile fish increases. By the way, the number of juveniles released for release is extremely large, and the production cost is added for juveniles artificially hatched and raised. The beneficiary burden is imposed, and the number of fry tails is counted when feeding fry to fishery producers. The conventional general method for counting the number of fry tails at that time is to scoop the fry with the growing water from the fry breeding tank using an opening container of appropriate capacity, once count the number of fry tails in the opening container, and use this as a standard guideline However, the fry density fluctuates significantly depending on the condition at the time of scooping, and in the case of trading of thousands or tens of thousands, it is 30 to the actual number of fish. It seemed that 59% was too much or too little. As another method, a method of scooping only fry once and weighing it and converting it from the unit fry weight was tried, but the fry traded in supply is 40 to 50 days at the most after hatching and the body length is only 20 to 30 mm. Since it is fragile, when it is separated from the growing water, it is instantly weakened, and there is a problem that a large number of fry located in the lower layer are killed by pressure when weighed. Therefore, as a fish counting device that automatically counts,
One has been proposed in the past. (1) As described in Japanese Utility Model Laid-Open No. 63-61078, one light source for irradiating almost the entire cross-sectional area is installed on one outer side of a transparent pipe having a sufficiently large cross-sectional area. On the other side, multiple light-receiving elements are arranged side by side in the direction orthogonal to the axis of the transparent pipe, and these light-receiving elements detect fry swimming in the transparent pipe, and the total number of detections is calculated to find the total number of fish. What counts. (2) As described in Japanese Patent Laid-Open No. 62-175890, fry and growing water are separated and flown, and only the separated fry are detected and counted by an optical sensor, and grown after the detection. Water and fry rejoin. (3) As described in JP-A-62-52693, the width of the middle portion of one siphon tube is expanded in a plane, and a large number of detection thin tubes (circular shape) Transparent tubes) are installed in parallel on the same plane in parallel, the light emitting section and the light receiving section are arranged facing each other for each thin tube, and a bypass is provided to branch at the front side of this widened portion and join again at the rear side. thing.

[Problems to be Solved by the Invention]

However, in the case of (1) above, the cross-sectional area of the transparent pipe is large enough to allow multiple juvenile fish to run in parallel, so juvenile juveniles may run multiple detection positions by the light receiving element. Since it freely swims or goes back in any direction, there is a problem that detection as an electronic signal becomes completely impossible. In the case of (2), since the fry are separated from the breeding water and transferred in the pipe or on the belt, the fry are weakened, and the fry separated from the breeding water bounces at the detection position by the optical sensor and the detection error occurs. There are problems such as occurrence. In the case of (3), although fry can be counted for each detection thin tube, a large number of detection thin tubes are arranged in parallel on the same plane in the widened part of the siphon pipe, so fry are Because the water gathers on both sides of the widened portion, and a branch flow to the bypass occurs at the center of the front end of the widened portion, the flow of water changes rapidly before the narrow tube for detection, and juveniles are increasingly biased on both sides of the widened portion Since the widened part has a sufficient width, the juveniles that are biased on both sides are concentrated and stay at the front ends of the detection thin tubes at both ends. As a result, the fry will be weakened or damaged, and even if a large number of detection thin tubes are used, they cannot be fully used and a large number of simultaneous counting cannot be performed. Further, since the detecting thin tube is a circular transparent tube, this acts as a lens to refract the light from the light emitting portion, and thus the fry cannot be detected accurately. Furthermore, in order to divide and join multiple detection thin tubes in parallel on the same plane in the widened part of the siphon tube, there is a difficulty in the structure of the front and rear ends of each detection thin tube. With difficulty. The present invention was made in order to solve the various conventional problems as described above, while smoothly flowing with the growing water without debilitating or damaging the fry, efficiently and accurately count the number of fry. The purpose is to provide a counting device for fry that can be used.

[Means for Solving the Problems]

The fry counting device according to the present invention has the following configuration. Feeding fry with water 1
The branch pipe joint 9 is connected to the tip of the fish collecting pipe 4 of the book. The branch pipe joint 9 is provided with a base portion 9a, three or more branch portions 9b that three-dimensionally radiate from the base portion 9a, and a conical separator 11 having a rounded tip at the center of these branches. . The branch pipes 9 thinner than the fish collecting pipe 4 were connected to the respective branch portions 9b. The tip end of each branch pipe 5 was connected to each branch portion of a confluent pipe joint 14 which has substantially the same structure as the branch pipe joint 9 and has a base portion, a branch portion, and a separator in the direction opposite to that of the branch pipe joint 9. thing. One fish discharge pipe 6 is connected to the base of this confluence pipe joint. A rectangular tube-shaped transparent sleeve with a predetermined width is provided in the middle of each flow dividing pipe 5.
That each of the 20 intervened. On the outside of both side walls forming a parallel cross section of each transparent sleeve 20,
The light emitting portion 8a and the light receiving portion 8b of the optical sensor 8 are transparent sleeves.
Placed opposite to each other with 20 in between. The light receiving portion 8b of the optical sensor 8 is connected to the counting circuit.

[Action]

According to such a configuration, for example, a large number of juveniles collected from the breeding tank by the fish collecting pipe 4 run side by side in the fish collecting pipe 4, but the branch pipe joint 9 connected to the fish collecting pipe 4 causes the breeding water to grow. And a branch portion 9b of the branch pipe joint 9
By branching into three or more flow dividing pipes 5 connected to each, one in each flow dividing pipe 5 runs in parallel. In this case, three or more branch portions 9b of the branch pipe joint 9 are three-dimensionally and radially branched from the base portion 9a, and a conical separator 11 with a rounded tip is provided at the center of the branch, so , Three or more flow dividing pipes 5 without being biased to a specific branch portion 9b
In addition, the conical separator 11 having a rounded tip allows the fluid to be smoothly guided into the flow dividing pipe 5 without any obstacle. When the fry that has entered each of the flow dividing tubes 5 passes through the transparent sleeve 20, it is detected by an optical sensor 8 provided outside the transparent sleeve 20, and the number of fry is counted as an electric signal. The total number of fry tails is obtained by summing the count values from all optical sensors. The transparent sleeve 20 is in the shape of a rectangular tube having a predetermined width, and since the light emitting portion 8a and the light receiving portion 8b of the optical sensor 8 are arranged to face each other on both sides of the parallel cross section with the transparent sleeve 20 interposed therebetween, The light from 8a passes straight through the transparent sleeve 20 without being subjected to the lens action by the transparent sleeve 20. The juveniles that have passed through the distribution pipe 5 are joined together with the breeding water to the fish discharge pipe 6 by the joining pipe joint 14 in the direction opposite to the branch pipe joint 9 and continuously transferred to another container.

【Example】

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an example of use of the counting device according to the present invention. In this example, a head is provided between the growing tank 1 and an appropriate container 2, and the growing water 3 in the growing tank 1 is one fish collecting pipe 4 and three or more dividing pipes 5 thinner than the fish collecting pipe 4. In addition, the light-emitting section 8a and the light-receiving section 8b are provided in each branch pipe 5 while naturally flowing into the container 2 through one fish discharge pipe 6 and transferring the fry 7 in the growing tank 1 to the container 2 according to the flow. The fry 7 is detected by the optical sensor 8 consisting of and is counted by the counting circuit. The fish collecting pipe 4 and the diversion pipe 5 are connected via a branch pipe joint 9, and the diversion pipe 5 and the fish discharge pipe 6 are connected via a joining pipe joint 14. FIG. 2 shows the relationship between the fish collecting pipe 4, the diversion pipe 5, and the fish discharging pipe 6 and the specific structure of the optical sensor 8. One ends of the three branch pipes 5 are connected to the branch portions 9b of the short branch pipe joint 9 in a three-dimensional radial manner and individually via nipples 10. The branch pipe joint 9 is a base portion 9a connected to the tip of the fish collecting pipe 4.
And a branching portion 9b that is integrally and radially branched from the base portion 9a. A conical separator 11 having a rounded tip is fixedly arranged at the center of the branch portion 9b, and the nipple 10 is fixed to the flange 11a of the separator 11 in a three-dimensional radial manner. The branch pipe joint 9 is a separator 11
At the same time, it is fixed to the upstream side support plate 13 by the pressing plate 12. The other ends of the plurality of flow dividing pipes 5 are connected to the fish discharge pipe 6 by a confluent pipe joint 14 which has substantially the same structure as the branch pipe joint 9 but has an opposite direction. The merging pipe joint 14 is a holding plate.
It is fixed to the downstream side support plate 16 by 15. The downstream side support plate 16 and the upstream side support plate 13 are connected to each other via a stay 17. Each of the flow dividing pipes 5 is configured by connecting an upstream hose 18, a detection transparent sleeve 20 having connectors 19 fixed at both ends, and a downstream hose 21 into one via nipples 22 and 23. Both hoses 18 and 21 have a cylindrical shape, and the transparent sleeve 20 has a rectangular tube shape, but their cross-sectional areas are the same, and this is common to all the diversion tubes 5. In particular, the gap between the inner surface of the branch portion 9b of the branch pipe joint 9 and the outer surface of the separator 11 and the inner diameter of the upstream hose 18 are preferably smaller than their body length so that the fry 7 will not go backward. The same applies to the width W inside the transparent sleeve 20 and the downstream hose 21. Incidentally, the width W of the transparent sleeve 20 is about 20 mm.
Further, the fish collecting pipe 4, the fish discharging pipe 6, the branch pipe joint 9 and the confluence pipe joint
14 has the same cross-sectional area, where A is the cross-sectional area and a is the cross-sectional area of each diversion pipe 5, the cross-sectional area A is equal to the sum of the cross-sectional areas a of all the diversion pipes 5. , Where n is the number of A, there is a relationship of A = a × n. By the way,
The inner diameter of the base portion 9a of the branch pipe joint 9 is about 50 mm. The optical sensor 8 of the total shunt tube 5 is similarly attached to the common sensor support plate 24 as shown in FIGS. 2 and 3. The light emitting portion 8a and the light receiving portion 8b of each optical sensor 8 are opposed to each other outside the both side walls forming the parallel section of the transparent sleeve 20 with the transparent sleeve 20 interposed therebetween, and the bracket of the sensor support plate 24.
It is fixed at 24a. The light emitting unit 8a includes a light source 25 such as a light emitting diode, a cylindrical lens 27 held by a lens base 26, and a slit plate 28. The light from the light source 25 is diffused by the cylindrical lens 27, and the slit of the slit plate 28 is slit. Transparent sleeve 20 as a uniform parallel light
Project light inside. The light receiving portion 8b includes a slit plate 29 and a light receiving element.
The light receiving element 30 receives the light transmitted through the transparent sleeve 20 and converts it into an electric signal. The sensor support plate 24 is provided with a recess 24b into which the transparent sleeve 20 is fitted. Therefore, the fry 7 that has entered the fish collecting tube 4 together with the growing water 3 from the growing tank 1 may be transferred in parallel in the fish collecting tube 4, but may be transferred through the branch pipe joint 9 to form a plurality of branch pipes 5. When splitting into the inside, each branch pipe 5 is sequentially entered one by one, and each split pipe 5 is detected by the optical sensor 8 one by one. Since the separator 11 in the branch pipe joint 9 has a conical shape, the fry 7 and the growing water 3 are smoothly divided into three or more flow dividing pipes 5. At this time, since the tip of the separator 11 is rounded, the juvenile is not damaged. In addition, since the branch portion 9b of the branch pipe joint 9 is branched in a three-dimensional radial manner from the base portion 9a, the juveniles are divided into three or more branch pipes 5 on average without being biased to a specific branch portion 9b. Moreover, since the cross-sectional areas a of the flow dividing pipes 5 are the same and the sum of the cross-sectional areas and the cross-sectional areas of the fish collecting pipe 4 and the fish discharging pipe 6 are almost the same, the breeding water is divided from the fish collecting pipe 4 into the flow dividing pipes. 5 and further diversion tube 4
From the air to the fish pipe 6 without causing bubbles or turbulent flow, the detection of the optical sensor 8 is not disturbed by the bubbles or turbulent flow, and the optical sensor 8 is accurate with less noise. Guaranteed detection. FIG. 4 is a block diagram of a counting circuit that counts the number of fry by an electric signal from each optical sensor 8. Each optical sensor 8
, The analog signal related to the detection from the light receiving portion 8b is amplified by the process amplifier 31, and the dead band amplifier
The high crest value noise component is removed by 32, and the analog signal change amount is extracted by differentiating by the differentiating circuit 33, and then the comparator 34 compares it with a predetermined reference voltage to extract only the component with a large change amount. The pulse output circuit 35 such as a photo coupler converts the pulse into a pulse corresponding to one fry, and the counter 36 counts the pulse. Then, the total number of fry transferred from the growing tank 1 to the container 2 can be obtained by adding the count value of the counter 36 to all the optical sensors 8 by using an adder, for example. FIG. 5 shows another example of use of the device of the present invention, in which an ejector pump 37 is provided in the middle of the fish collecting pipe 4 to forcibly transfer the fry 7 in the growing tank 1 together with the growing water 3. is there.

【The invention's effect】

The present invention has the following effects. A. A large number of juveniles that have been transferred together with the breeding water by one fish collecting pipe are branched into three or more branch pipes in a three-dimensional radial manner by a branch pipe joint and sequentially flowed one by one in each branch pipe, and each branch pipe Since it is detected by the optical sensor, the simultaneous counting of a large number of fish can be reliably performed, and the number of fry can be efficiently counted. B. The branch pipe joint for branching from the fish collecting pipe to the branch pipe has three or more branch portions radially branched from the base portion, and the conical separator with a rounded tip is provided at the branch center portion, The juveniles divide on average into three or more branch pipes without being biased to a specific branch. C. Since the separator of the branch pipe joint has a conical shape with a rounded tip, fry can be smoothly guided into the diversion pipe without obstacles. D. The merging pipe joint that joins the diverting pipe into one fish-discharging pipe is a reverse pipe of the structure that is substantially the same as the branch pipe joint. Can be merged into. Therefore, by such an action of the branch pipe joint and the confluence pipe joint, it is possible to smoothly divide and join the fry without debilitating or damaging the juvenile fish and without biasing it. E. A rectangular tube-shaped transparent sleeve having a predetermined width is interposed in the middle of each flow dividing pipe, and the light emitting portion and the light receiving portion of the optical sensor are arranged opposite to each other outside the both side walls having a parallel cross section with the transparent sleeve interposed therebetween. Therefore, the transparent sleeve does not act as a lens, and the light from the light emitting portion is transmitted straight through the transparent sleeve, so that the fry can be accurately detected. F. Three or more flow dividing pipes are connected to one fish collecting pipe via a branch pipe joint, and these flow dividing pipes are connected to each other via a confluent pipe joint which has substantially the same structure as the branch pipe joint but has a reversed direction. Since it is connected to a fish discharge pipe of a book, a transparent sleeve having a rectangular tube shape is interposed in the middle of each branch pipe, and the light emitting portion and the light receiving portion of the optical sensor are arranged to face each other with the transparent sleeve sandwiched between them, manufacturing It is easy and easy to maintain. According to claim 2, the cross-sectional areas of the flow dividing pipes are made the same, and the cross-sectional areas of the fish collecting pipe, the fish discharging pipe, the branch pipe joint, and the confluent pipe joint are the same, and this cross-sectional area and the total flow dividing pipe are Since the sum of the cross-sectional areas is the same, there are no fluctuations in flow or pressure in all paths, so bubbles and turbulence do not occur, the detection by the optical sensor can be performed accurately, and the stimulation given to the fry Also less. According to a third aspect of the present invention, the light emitting portion of the optical sensor is composed of a light source, a cylindrical lens for diffusing light from the light source, and a slit plate having a slit, and the light receiving portion includes a slit plate and a light receiving element. Since it is configured as described above, it is possible to project and receive parallel light that is perpendicular to the passing direction of the fry and improve the fry detection accuracy.

[Brief description of drawings]

FIG. 1 is a schematic view of a usage example of a fry counting device according to the present invention, FIG. 2 is a sectional view of a main part of this counting device, FIG. 3 is a partially cutaway front view of an optical sensor thereof, and FIG. FIG. 5 is a block diagram of the counting circuit, and FIG. 5 is a schematic diagram of another example of use of the counting device of the present invention. 1 ... Breeding tank, 3 ... Breeding water, 4 ... Fish collecting tube, 5 ... Dividing tube, 6
... Fish discharge tube, 7 ... Fry, 8 ... Optical sensor, 8a ... Light emitting part, 8
b ... Light receiving part, 9 ... Branch pipe joint, 9a ... Base part, 9b ... Branch part, 11 ... Separator, 14 ... Confluence pipe joint, 20 ... Transparent sleeve, 25 ... Light source, 27 ... Cylindrical lens, 28.29 ... Slit plate , 30 ... Light receiving element 30.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shonan Kurihara 3-3-5 Kachidoki, Chuo-ku, Tokyo Motochigouchi Co., Ltd. (56) References JP-A-62-52693 (JP, A)

Claims (3)

[Claims] 1. A branch pipe joint 9 is connected to the tip of one fish collecting pipe 4 for feeding fry together with water. The branch pipe joint 9 has a base portion 9a and a three-dimensional radial branch from the base portion 9a. 3 or more branch portions 9b and a conical separator with a rounded tip at the center of these branches
11 is provided, each branching part 9b is connected to a branch pipe 5 thinner than the fish collecting pipe 4, and the tip of each branching pipe 5 has substantially the same structure as the branch pipe joint 9. Branch pipe joint 9 for base, branch and separator
Connected to each branch of the confluent pipe joint 14 in the opposite direction to that of the above, one fish discharge pipe 6 connected to the base of this confluent pipe joint, Since the transparent sleeves 20 each having a rectangular tubular shape are interposed, the light emitting portions 8a and the light receiving portions 8b of the optical sensor 8 are provided on the outer sides of both side walls forming the parallel cross section of each transparent sleeve 20.
The fry counting device is characterized in that the light receiving part 8b of the optical sensor 8 is connected to a counting circuit. 2. The flow dividing pipes 5 have the same cross-sectional area a, and the fish collecting pipe 4, the fish discharging pipe 6, the branch pipe joint 9 and the confluent pipe joint 14 have the same cross-sectional area A. The fry counting device according to claim 1, wherein the cross-sectional area A and the total sum of the cross-sectional areas a of the total distribution tubes 5 are the same. 3. The light emitting section 8a includes a light source 25 and the light source 25.
It is composed of a cylindrical lens 27 for diffusing the light from and a slit plate 28 having a slit.
The fry counting device according to claim 1, wherein the fowl counting device comprises a slit plate 29 and a light receiving element 30.