Capacitance type fry separation counter and counting method

Abstract

The application discloses a capacitive fry separating counter, which comprises a fry temporary storage box, at least one set of rotating discs arranged in the fry temporary storage box, a grid baffle assembly arranged on one side of the fry temporary storage box, a fry separating chute arranged on the other side of the grid baffle assembly, a plurality of sets of outlets of the fry separating chute, and a counting sensor arranged in each set of the outlets, wherein the lower bottom surface of the fry separating chute is alternately distributed by fixed separating plates and movable separating plates, the movable separating plates are connected with a connecting frame and are driven to move through a horizontal pushing mechanism, and the fixed separating plates and the movable separating plates are both provided with baffle rods.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fish farming, in particular to a capacitive fry separation counter and a counting method. BACKGROUND

[0002] The traditional manual sampling and weighing method in the small fish farming industry in China not only consumes time and effort, but also may cause harm and stress to the fish, affecting the survival rate. The commonly used solutions on the market are mainly photoelectric counting and visual counting. However, both methods have the same difficulty in the counting process: due to the large number of fry being detected, the phenomenon of overlapping up and down and overlapping front and back may occur when passing through the counting area, causing the loss of overlapping fry counting, greatly affecting the accuracy of the detection device. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a capacitive fry separation counter and a counting method, which effectively separates the fish fry adhered together, so that the fish fry is in a one-by-one state when sliding out of the separation plate, improving the detection accuracy.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is:

[0005] The capacitive fry separation counter comprises a first separation mechanism, a second separation mechanism and a third separation counting mechanism.

[0006] The first separation mechanism comprises a fry temporary storage box, and at least one set of rotating disc is arranged in the fry temporary storage box.

[0007] The second separation mechanism is a grid baffle assembly arranged at the outlet of the fry temporary storage box.

[0008] The third separation counting mechanism comprises a fish separation chute, the inlet of the fish separation chute is opposite to the grid baffle assembly; the outlet of the fish separation chute is a plurality of groups, and a counting sensor is arranged in each group of outlet; the lower bottom surface of the fish separation chute is alternately distributed by a fixed separation plate and a movable separation plate, wherein the fixed separation plate is fixed at the bottom of the fish separation chute, one side of the movable separation plate extends out of the fish separation chute and is connected with a connecting frame, and the connecting frame is driven to move by a flat pushing mechanism; the fixed separation plate and the movable separation plate are both provided with a baffle rod.

[0009] The flat pushing mechanism comprises a rudder disc driven by a rudder, a push rod is hingedly connected to the rudder disc offset from the center, the other end of the push rod is hingedly connected with a sliding block, and the sliding block is fixed with the connecting frame and slides along the length direction of the sliding rail.

[0010] The baffle rod is made of rubber material and has a columnar shape.

[0011] The fish separation chute is in a whole arc shape, the side of the fish separation chute close to the fry temporary storage box is high, and the end close to the outlet is low.

[0012] The water tank is provided below the outlet and water is pumped into the temporary fish fry storage tank through a circulating water pump and a water pipe.

[0013] The multiple rows of stop levers on the fixed separation plate and the multiple rows of stop levers on the movable separation plate are gradually reduced in horizontal arrangement spacing from high to low.

[0014] The counting sensor is a capacitive pulse sensor.

[0015] The capacitive fish fry separation and counting method comprises the following steps:

[0016] 1) Adjust the channel size of the grid stop plate assembly and the relative position between the fixed separation plate and the movable separation plate according to the size of the fish fry to be separated, so that the fish fry is separated into a single row.

[0017] 2) When the fish fry needs to be counted, the sample is introduced into the temporary fish fry storage tank, the fish fry is preliminarily centrifugally dispersed from the temporary fish fry storage tank, the flow of the fish fry is limited by the grid stop plate assembly, the fish fry flows out of each channel of the grid stop plate assembly and flows into the fish separation chute, and after being separated by the multiple rows of stop levers, the fish fry is in a single row when entering the outlet, and the counting of the fish fry is realized by the counting sensor.

[0018] 3) When the last fish fry has a slow sliding speed or is stuck, the water circulation is started to send all the fish fry to the water tank.

[0019] In step 1), different fish fry sizes are different, and in order to achieve the separation of the fish fry into a single row, the channel size of the grid stop plate assembly and the relative position between the fixed separation plate and the movable separation plate are also different. The optimal opening degree of the grid stop plate assembly and the optimal relative position between the fixed separation plate and the movable separation plate are obtained according to the best test results of different varieties of fish fry, the corresponding rotation angle of the rudder is programmed and recorded into the system, and different options are selected during use, and the relative position of the grid stop plate assembly and the relative position between the fixed separation plate and the movable separation plate are automatically adjusted by the program control of the corresponding rudder.

[0020] The capacitive fish fry separation and counter provided by the application has the following technical effects:

[0021] 1) In the process of separation and counting of the fish fry, the fish fry is separated by stages: first centrifugation, second stop plate, and third passing through the rubber stop lever. The centrifugal blades rotate at a certain speed in combination with the double-layer grid stop plate, so that the fish fry is centrifugally dispersed, the sliding speed of the fish is controlled, the fish passes through the rubber stop lever, the fish fry is effectively prevented from stacking and adhering, the fish fry passes through the outlet in an orderly manner without stacking and adhering, and the fish fry is measured by the capacitive counter in the outlet, so that accurate counting is realized.

[0022] 2) By using the form of fixed separation plate and dynamic separation plate splicing, the relative position of the stop rod (rubber cylinder) changes, the counting of fry of different sizes can be realized, and the use range is expanded. Whether it is a fixed separation plate or a dynamic separation plate, the distance between the two rubber cylinders from top to bottom is gradually reduced, the fixed separation plate is fixed on the fish separation chute, and the dynamic separation plate moves parallelly through the crank slider mechanism, so that the relative position of the stop rod on the fixed separation plate and the dynamic separation plate is changed, and the most effective separation of fish of different sizes is realized. This split type design allows users to flexibly configure the equipment according to actual needs.

[0023] 3) By changing the relative position of the double-layer grid baffle, the opening size can be accurately controlled, so that the effective separation of fry is realized. Once the flow exceeds the specified range, the gap between the double-layer grid baffles is reduced or located at the cutoff position, so that flexible adjustment is realized. Combined with the use of double-layer grid baffles and stop rods, the flow of fish can be effectively controlled to achieve the purpose of separation and counting.

[0024] 4) By setting the fry temporary storage box, water tank, water pipe and circulating water pump, water circulation can be realized, the utilization rate of water resources can be improved, and waste can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application will be further described below in combination with the drawings and examples:

[0026] Figure 1 It is a structural schematic diagram of the application.

[0027] Figure 2 It is a left view of the application.

[0028] Figure 3 It is a structural schematic diagram of the push mechanism in the application.

[0029] Figure 4 It is the first limit state of the application.

[0030] Figure 5 It is the second limit state of the application.

[0031] Figure 6 It is a schematic diagram of the distribution state of the stop rod in the first limit state of the application.

[0032] Figure 7 It is a schematic diagram of the distribution state of the stop rod in the second limit state of the application.

[0033] Figure 8 It is a schematic diagram of the fully open state of the grid baffle assembly in the application.

[0034] Figure 9 It is a schematic diagram of the fully closed state of the grid baffle assembly in the application.

[0035] Figure 10 The schematic diagram of the circuit connection of the counting sensor in the application.

[0036] In the figure: rotating disc 1, fixed separation plate 2, movable separation plate 3, outlet 4, fry temporary storage tank 5, fry separation chute 6, connecting frame 7, circulating water pump 8, water pipe 9, counting sensor 10, water tank 11, sliding rail 12, steering wheel 13, push rod 14, sliding block 15, grid baffle assembly 16, baffle rod 17, shan plate control steering engine 18, shan plate control steering wheel 19, shan plate control connecting rod 20, first electrode 10.1, second electrode 10.2, first wire 10.3, second wire 10.4, capacitance measurement module 10.5, pulse shaping module 10.6, single-chip microcomputer 10.7, display 10.8. DETAILED DESCRIPTION

[0037] As shown in the figure, Figure 1 The capacitive fry separation counter comprises a fry temporary storage tank 5, and a rotating disc 1 is arranged at the bottom of the fry temporary storage tank 5. In the rotating process of the rotating disc 1, the blades on the rotating disc 1 rotate to centrifugally disperse the fry, which helps to preliminarily prevent the fry from stacking and adhering, ensures the uniformity of separation, and realizes primary separation of the fry.

[0038] A grid baffle assembly 16 is arranged on one side of the fry temporary storage tank 5, and the grid baffle assembly 16 is used to remove the fry from the fry temporary storage tank 5. The grid baffle assembly 16 is used to realize secondary separation of the fry.

[0039] As shown in the figure, Figures 9-10 Preferably, the grid baffle assembly 16 is made of an aluminum plate with light weight, corrosion resistance, and high yield strength, and comprises a first grid baffle and a second grid baffle. The first grid baffle is fixed, and the second grid baffle is movable. The second grid baffle is also driven and adjusted by a crank push rod mechanism. The shan plate control steering engine 18 drives the shan plate control steering wheel 19 to rotate. The shan plate control connecting rod 20 is hingedly connected to the shan plate control steering wheel 19 away from the center of the circle. The other end of the shan plate control connecting rod 20 is hingedly connected to the second grid baffle. The lower end of the second grid baffle is located on the sliding rail. The second grid baffle is moved left and right by rotating the steering engine, so as to realize the left and right movement adjustment of the second grid baffle. In turn, the size of the outlet of the grid baffle assembly 16 is adjusted.

[0040] The size of the grid baffle determines the separation speed, but the grid baffle is too large, which not only increases the cost, but also makes the grid baffle too heavy. The heavy grid baffle is inconvenient to carry and increases the burden of the supporting structure. Therefore, it is very important to determine the size of the grid baffle. Therefore, we use double-layer grid baffles to conveniently control and adjust the size of the inlet at any time. By changing the relative positions of the two layers of grid baffles, the size of the inlet can be accurately controlled, so as to realize effective separation of the fry.

[0041] A fish sorting chute 6 is fixed on one side of the fish fry temporary storage box 5, and the lower bottom surface of the fish sorting chute 6 is composed of a fixed separation plate 2 and a movable separation plate 3. The fixed separation plate 2 and the movable separation plate 3 are arranged alternately in multiple groups. The fixed separation plate 2 is fixed at the bottom of the fish sorting chute 6, and the movable separation plate 3 extends out of the fish sorting chute 6 on one side and is connected with a connecting frame 7. The connecting frame 7 is driven to move by a flat push mechanism. The upper ends of the fixed separation plate 2 and the movable separation plate 3 are both distributed with rows of blocking rods 17. When the fixed separation plate 2 and the movable separation plate 3 move relatively, the horizontal displacement between adjacent rows of blocking rods 17 changes.

[0042] As shown in Figure 3 , the flat push mechanism is a crank slider mechanism, which includes a steering wheel 13 driven to rotate by a steering engine. The steering wheel 13 is hingedly connected with a push rod 14 offset from the center of the circle, and the other end of the push rod 14 is hingedly connected with a sliding block 15 which slides along the length direction of a sliding rail 12. The sliding rail 12 is fixed at the lower part of the fish sorting chute 6, and the sliding block 15 is fixedly connected with the connecting frame 7.

[0043] The steering engine drives the steering wheel 13 to rotate, and the steering wheel 13 drives the sliding block 15 to move horizontally along the sliding rail 12 through the push rod 14, so as to change the relative positions of the blocking rods 17 on the fixed separation plate 2 and the movable separation plate 3, thereby realizing the most effective separation of fish of different varieties, different sizes and different body shapes, and expanding the use range.

[0044] The distance between the adjacent upper and lower rows of blocking rods is fixed and unchanged. What changes is the relative position of the upper and lower rows from left to right. The movable separation plate can only move horizontally and parallelly.

[0045] Preferably, in the initial state, the blocking rods 17 on the fixed separation plate 2 and the movable separation plate 3 correspond to each other in front and back, and after the flat push mechanism drives the movable separation plate 3 to move relative to the fixed separation plate 2, the offset distance difference is within the range of 0-10 mm. In the lowermost row of blocking rods, the distance between the two horizontal blocking rods 17 is the shortest, and the distance between the two blocking rods is 10 mm. When the movable separation plate moves relative to the fixed separation plate, the blocking rods on the movable separation plate will be located between the blocking rods on the fixed separation plate.

[0046] For grass carp fry, the width of the fry is about 3-7 mm. When the blocking rod of the movable separation plate is located between the two adjacent blocking rods of the fixed separation plate, the fry can be effectively separated.

[0047] For other kinds of fry, the relative positions of the movable separation plate 3 and the fixed separation plate 2 are adjusted according to experiments, and a state is found in which the fry finally forms a strip. The state of the steering engine is recorded and stored in the program, so as to facilitate the quick use of the same fry next time.

[0048] Preferably, the blocking rod 17 is made of rubber material and has a columnar shape. The rubber material makes the fry as little hurt as possible. The columnar shape reduces the harm to the fry caused by edges and corners.

[0049] Preferably, the fish separating chute 6 is arc-shaped as a whole, and the side close to the fry temporary storage tank 5 is high, and the end close to the outlet 4 of the fish separating chute 6 is low. By setting the fish separating chute 6 as arc-shaped, the advantages are: the curved shape makes the fish accelerate to dive. If two fish are close to each other at the beginning, the front fish will accelerate faster, which leads to the separation of the fish. The curved surface is relatively flat, and the slow sliding speed and the dispersed flow path help to reduce the stress and tension of the fry during the counting process, which is beneficial to maintain the health and survival rate of the fry.

[0050] Preferably, the multiple rows of stoppers 17 on the fixed separating plate 2 and the multiple rows of stoppers 17 on the movable separating plate 3 are gradually reduced in horizontal spacing from high to low. For example: the stoppers 17 on the fixed separating plate 2 are arranged from high to low, the spacing between the adjacent two stoppers 17 in the first row of stoppers 17 is larger than the spacing between the adjacent two stoppers 17 in the second row of stoppers 17, the spacing between the adjacent two stoppers 17 in the second row of stoppers 17 is larger than the spacing between the adjacent two stoppers 17 in the third row of stoppers 17. The arrangement is sequentially arranged. By gradually shortening the spacing, the fry does not appear to be stacked up and down and adhered left and right when sliding out of the fish separating chute 6, and can be in a one-by-one state, thereby orderly entering the capacitive counter.

[0051] There is a row of outlets 4 at the lowest end of the fish separating chute 6, and a counting sensor 10 is arranged in each outlet 4. The counting sensor 10 is a capacitive pulse sensor, which counts the fry. The sensor can provide up to 28-bit resolution, and can measure 0.001 pf. The two poles (copper plates) of the capacitive pulse sensor are respectively connected to the measurement display circuit through wires. The measurement display circuit is connected to the capacitive measurement module, the pulse shaping module, the single-chip microcomputer counter, and finally the display.

[0052] The capacitive pulse sensor is consistent with the principle of capacitive structure, and two opposite copper plates are used as two electrodes (first electrode 10.1, first electrode 10.2). The fish fry signal is transmitted through the wires connected to the corresponding electrodes. It is placed on both sides of the outlet 4 and tightly attached to the left and right sides or the upper and lower sides of the outlet 4.

[0053] There is no such ready-made sensor system on the market at present, and we have designed a high-precision capacitive sensor.

[0054] The high-precision capacitive sensing technology can sensitively respond to the passing of the tiny fry, and realize accurate and rapid counting of the fry. The photoelectric counting method generates one pulse for one fry. When the fry is very small, the photoelectric counting method is prone to misjudgment. The image counting method needs a large amount of data for training and needs a certain time, and the reaction is not timely for small fry. The capacitive method is based on the fact that the capacitive characteristics of the fry and water are different. When the fry passes, the capacitance changes greatly when the water passes the capacitor, and the counting can be directly performed. Moreover, the capacitive pulse sensor has high sensitivity, and the reaction to small fry is also very sensitive, so the counting can be accurately performed.

[0055] Measurement principle: The capacitive pulse sensor is based on the principle of LC resonant circuit. When the fry passes through the sensor, the capacitance of the transmission end changes, causing the change of the oscillation frequency of the LC circuit, and then the frequency conversion is converted into a voltage signal. Then, a threshold is set by a comparator to generate a pulse. If the medium is water, it is a kind of capacitance value, and if it is fish, it is another kind of capacitance value. Moreover, the capacitance value changes with the volume of the fish body, and the capacitance changes from large to small from the head to the tail of the fish. Therefore, when the fish passes through the capacitive pulse sensor, the capacitance will have a continuous mutation. The mutation waveform is shaped into a pulse signal by a circuit, and the number of pulses can be counted by a single-chip microcomputer to obtain the number of fish.

[0056] Once the flow exceeds the specified range, the control makes the gap between the double-layer grid baffles smaller or located at the cutoff position.

[0057] Combined with the double-layer grid baffles and the fish separating chute 6, the flow of the fish can be effectively controlled to achieve the purpose of separation and counting.

[0058] Preferably, in order to smoothly flush the fish from the fry temporary storage tank 5 into the waterway, a circulating water system is provided here, which includes a water tank 11 arranged below the outlet 4. The water tank 11 punches water into the fry temporary storage tank 5 through a circulating water pump 8 and a water pipe 9. In this way, not only the separation of the fry can be realized, but also the utilization rate of water resources is improved and the waste is reduced.

[0059] The method for counting by the capacitive fry separation counter comprises the following steps:

[0060] 1. Adjust the channel size of the grid baffle assembly 16 and the relative position between the fixed separation plate 2 and the movable separation plate 3 according to the size of the fry to be separated, so as to meet the requirement of separating the fry into a strip.

[0061] 2. When the fry needs to be counted, the sample is introduced into the fry temporary storage tank 5. The fry is preliminarily centrifugally dispersed from the fry temporary storage tank 5, and then the flow of the fry is limited by the grid baffle assembly 16. The fry comes out of each channel of the grid baffle assembly 16 and flows into the fish separating chute 6. After being separated by multiple rows of baffles 17, the fry presents a strip state when entering the outlet 4, and then the counting of the fry is realized by the counting sensor 10.

[0062] 3. When the last few fry slide too slowly or get stuck, turn on the water circulation to send all the fry to the water tank.

[0063] In step 1, the different sizes of fry are separated into different strips, and the size of the channel of the grid baffle assembly 16 and the relative position between the fixed separation plate 2 and the movable separation plate 3 are different. According to the best test results of different varieties of fry, the corresponding rotation angle of the steering wheel when the grid baffle assembly 16 reaches the best opening and the best relative position between the fixed separation plate 2 and the movable separation plate 3 is obtained, which is programmed and recorded into the system. When using, select different options, use the program to automatically adjust the relative position of the grid baffle assembly 16 and the relative position between the fixed separation plate 2 and the movable separation plate 3 by controlling the corresponding steering wheel.

Claims

1. A capacitance type fry separation counter, characterized by: The device comprises a first separation mechanism, a second separation mechanism and a third separation counting mechanism. The first separation mechanism comprises a fish fry temporary storage box (5), and at least one set of rotating disc (1) is arranged in the fish fry temporary storage box (5). The second separation mechanism is arranged at the outlet of the fish fry temporary storage box (5) and is a grid baffle assembly (16). The third separation counting mechanism comprises a fish separating chute (6), the inlet of the fish separating chute (6) is opposite to the grid baffle assembly (16), the outlet (4) of the fish separating chute (6) is multiple groups, and a counting sensor (10) is arranged in each group of outlet (4); the lower bottom surface of the fish separating chute (6) is alternately distributed by the fixed separation plate (2) and the movable separation plate (3), wherein the fixed separation plate (2) is fixed at the bottom of the fish separating chute (6), the movable separation plate (3) is extended out of the fish separating chute (6) on one side and is connected with the connecting frame (7), the connecting frame (7) is driven to move through the flat pushing mechanism; the fixed separation plate (2) and the movable separation plate (3) are both provided with a blocking rod (17). The counting sensor (10) is a capacitive pulse sensor, which comprises a first electrode (10.1) and a second electrode (10.2), the first electrode (10.1) and the second electrode (10.2) are arranged at upper and lower positions or left and right positions of the outlet (4) respectively, and the first electrode (10.1) and the second electrode (10.2) are connected with a measuring and displaying circuit through wires; the measuring and displaying circuit comprises a capacitive measuring module (10.5), a pulse shaping module (10.6), a single-chip microcomputer (10.7) and a display (10.8) which are electrically connected in sequence.

2. The capacitance type fry separation counter according to claim 1, wherein: The flat pushing mechanism comprises a rudder disc (13), the rudder disc (13) is driven by a rudder, the rudder disc (13) is hingedly connected with a push rod (14) which is deviated from the center of the rudder disc (13), the other end of the push rod (14) is hingedly connected with a sliding block (15), and the sliding block (15) is fixed with the connecting frame (7) and slides along the length direction of a sliding rail (12).

3. The capacitance type fry separating counter according to claim 1, wherein: The blocking rod (17) is made of rubber and has a columnar shape.

4. The capacitance type fry separation counter according to claim 1, wherein: The fish separating chute (6) has a circular arc shape, the side of the fish separating chute (6) close to the fish fry temporary storage box (5) is high, and the end of the fish separating chute (6) close to the outlet (4) is low.

5. The capacitance type fry separating counter according to claim 4, wherein: A water tank (11) is arranged below the outlet (4), and the water tank (11) is connected with a circulating water pump (8) and a water pipe (9) to spray water into the fish fry temporary storage box (5).

6. The capacitance type fry separating counter according to claim 4, wherein: The multiple rows of blocking rods (17) on the fixed separation plate (2) and the multiple rows of blocking rods (17) on the movable separation plate (3) are gradually reduced in horizontal arrangement interval from high to low.

7. The method for counting by the capacitive fish fry separation counter according to any one of claims 1-6, comprising the following steps: 1) adjusting the channel size of the grid baffle assembly (16) and the relative position between the fixed separation plate (2) and the movable separation plate (3) according to the size of the fish fry to be separated, so that the separated fish fry can be in a strip shape. 2), when the fish fry needs to be counted, the sample is introduced into the fish fry temporary storage box (5), the fish fry is centrifugally dispersed from the fish fry temporary storage box (5) through the first-stage separation, the flow of the fish fry is limited through the grid baffle assembly (16), the fish fry flows into the fish separating chute (6) from each channel of the grid baffle assembly (16), after being separated by the multiple rows of baffle rods (17), the fish fry is in a one-by-one state when entering the outlet (4), and the counting of the fish fry is realized through the counting sensor (10); 3), when the last fish fry slides too slowly or is stuck, the water circulation is started, and the fish fry is completely sent to the water tank.

8. The method of counting according to claim 7, wherein: In step 1), different fish fry sizes are different, in order to achieve the separation of the fish fry into a one-by-one state, the size of the channel of the grid baffle assembly (16) and the relative position between the fixed separation plate (2) and the movable separation plate (3) are also different, the best opening of the grid baffle assembly (16) and the best relative position between the fixed separation plate (2) and the movable separation plate (3) can be obtained according to the best test results of different varieties of fish fry, the corresponding rotation angle of the steering wheel is programmed and recorded into the system, and when used, different options are selected, and the relative position of the grid baffle assembly (16) and the relative position between the fixed separation plate (2) and the movable separation plate (3) are automatically adjusted by the program control of the corresponding steering wheel.

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