CN111374081B

CN111374081B - Sturgeon underwater feeding device capable of measuring food intake and control method

Info

Publication number: CN111374081B
Application number: CN202010182035.7A
Authority: CN
Inventors: 郑百成
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2021-09-03
Anticipated expiration: 2040-03-16
Also published as: CN111374081A

Abstract

The invention discloses a sturgeon underwater feeding device capable of measuring food intake and a control method thereof. The underwater sturgeon feeding device has high feed utilization rate, and can count the feed intake of each sturgeon, thereby providing scientific and accurate feeding data for sturgeon culture and having very high practical value.

Description

Sturgeon underwater feeding device capable of measuring food intake and control method

Technical Field

The invention relates to the technical field of fish culture, in particular to a sturgeon underwater feeding device capable of measuring food intake and a control method.

Background

In the sturgeon culture production, the feed feeding not only accounts for 50% -60% of the whole culture cost, but also directly influences the breeding and growth of sturgeons, and has the advantages of immunity, disease resistance, product quality, environmental safety and the like. For a long time, aquatic science and technology workers develop a series of research and development around sturgeon feed and feeding technology thereof, develop various feeds, research various feeding devices, determine four fixed feeding methods of 'timing, quantifying, fixing quality and fixing points', and effectively promote the rapid development of sturgeon culture production. However, research and development of people to date has been that sturgeon is bred and fed, and research on the amount of sturgeon intake and the amount of feed loss cannot be accurately proved, and the amount of feed intake of each sturgeon cannot be determined, so that sufficient feeding data cannot be provided for scientific culture of sturgeons. Therefore, the utilization rate of the feed for artificial feeding is influenced, the feed loss is increased, the emission of ammonia and phosphorus is increased, and the sustainable development of the sturgeon industry is restricted. The publication date is 2019, 9 and 10, and Chinese patent document with publication number CN110214735A discloses a sturgeon larva feed feeding device, wherein the top end of a material storage container is provided with a feed port, the bottom of the material storage container is provided with a discharge port with a valve and is connected with the upper end of a feed pipe, the lower end of the feed pipe is connected with the top of a conical body, the lower part of the feed pipe close to the conical body is provided with a feed divider, the periphery of the bottom of the conical body is provided with a plurality of feeding platforms, the feeding platforms are connected with the feed divider through feed dividing pipes, the feed dividing pipes are arranged along the conical surface of the conical body, and the feed feeding device further comprises a controller. The publication date is 2020, 2 and 21 days, and Chinese patent document with publication number CN110810298A discloses a sturgeon larva feed feeding device and a control method, wherein a discharge port with a valve at the bottom of a feed tank is connected with the top of a pyramid through a feeding pipe, the pyramid is formed by connecting a plurality of trapezoidal plates, two adjacent trapezoidal plates are connected through flexible connecting cloth, the upper ends of the trapezoidal plates are hinged with the lower end of the feeding pipe, a feed divider is arranged at the lower part of the feeding pipe, a plurality of feeding platforms are arranged at the periphery of the bottom of the pyramid, the feeding platforms are connected with the feed divider through the feeding pipe, and the feeding device further comprises a pyramid vertex angle adjusting device and a controller of the pyramid. Above-mentioned two kinds of sturgeon juvenile's fodder is thrown and is fed device and sturgeon juvenile's the habit of ingesting high adaptation, can do corresponding regulation according to sturgeon's the condition of eating and need in order to adapt to sturgeon's the ingestion, and it is efficient to throw and feed, throws and raises evenly and feed utilization and rate height. However, the two kinds of feed feeding devices are only suitable for young sturgeons with downward feeding and licking habits, but are not suitable for older sturgeons with biting habits (usually more than 3-4 years old), feed is placed on a feeding table in water by the two kinds of feed feeding devices, the feed is easily lost, and meanwhile, the two kinds of feed feeding devices cannot count the feed intake of each sturgeon, and scientific and accurate feeding data cannot be provided for the sturgeon culture.

Disclosure of Invention

The invention aims to solve the problems that a sturgeon feed feeding device in the prior art is easy to cause feed loss, cannot count feed intake of each sturgeon and cannot provide scientific and accurate feeding data for sturgeon culture, and provides an underwater sturgeon feeding device capable of counting feed intake and a control method.

The invention adopts the following specific technical scheme for solving the technical problems: an underwater sturgeon feeding device capable of measuring food intake, which comprises a feed tank suspended on the water surface, wherein the top end of the feed tank is provided with a feed inlet, a discharge port with a valve at the bottom of the feed tank is connected with a feed inlet of a feeding device, a discharge port of the feeding device is connected with the top of a storage bin, the bottom of the storage bin is provided with a material distributing box which is connected with a plurality of material conveying pipes which are radially arranged, the feed delivery pipe is arranged from high to low in the flowing direction of the feed, the tail end of the feed delivery pipe is provided with a feeding nozzle made of soft elastic material, the feeding nozzle is provided with an extrusion switch, the sturgeon underwater feeding device capable of measuring food intake also comprises a control system and a PIT marking system, wherein the PIT marking system comprises a PIT transceiver, an antenna and a PIT label, the PIT label is preset in the sturgeon body, and the feeding device, the extrusion switch and the PIT marking system are all connected with the control system. The invention is provided with a PIT (passive integrated Transponder) marking system, PIT labels are preset in the cultivated sturgeons, and the PIT labels preset in the sturgeons can be identified through the PIT marking system, so that the aims of identifying each sturgeon and counting the food intake of each sturgeon are fulfilled. The PIT label is an electronic microchip device which is arranged in a biochemical glass tube which is compatible with biological tissues and is injected with a marked code, and can be implanted into a fish body by injection and the like. The working principle of the PIT marking system is that the marked sturgeons are identified by using a radio frequency identification technology, and each sturgeon can have a unique identity code. The PIT tag has the advantages of small volume, long service life, difficult falling off when implanted into the sturgeon body, high reading accuracy and no obvious influence on the growth and development of the sturgeon, particularly the swimming capability. The sturgeon feed in the feed tank is connected with the material distribution box through the feeding device and the storage bin, the feeding device is used for feeding the feed into the storage bin, the storage bin has a certain height, so that the feed at the bottom of the storage bin has a certain pressure, and meanwhile, the feed conveying pipe is obliquely arranged from high to low in the flow direction of the feed, so that the feed can smoothly enter the feeding nozzle through the material distribution box and the feed conveying pipe; the feeding mouth made of soft elastic materials (usually rubber, silica gel and the like) generates an extrusion effect when the sturgeons bite to eat, so that the feed in the feeding mouth is extruded out and is ingested by the sturgeons. Feed and eat and be equipped with the extrusion switch on the mouth, bite at sturgeon and eat the extrusion when feeding the mouth, the extrusion switch is closed, open the PIT mark system through control system and discern the internal PIT label of preset sturgeon, will feed and eat the mouth and be extruded (the fodder is extruded and is ingested promptly) the number of times and the sturgeon code record that the PIT label corresponds, can count out every sturgeon and bite the number of times of eating the mouth (the closed number of times that extrudes the switch promptly) at certain period, thereby according to feeding the fodder average extrusion volume of eating when the mouth is extruded at every turn and calculating out every sturgeon's food intake. The average extrusion amount of the feed can be measured in advance through experiment or calculated by dividing the total consumption amount of the feed in a period of time by the total number of times the feeding mouth is extruded in the period of time. The material conveying pipes are arranged in a radial shape, and the tail ends of the material conveying pipes are spaced sufficiently, so that mutual interference during PIT label identification can be avoided. In addition, the opening of the feeding nozzle is opened when being squeezed, and the opening is automatically closed when the squeezing force disappears, so that the feed cannot be lost. Therefore, the sturgeon underwater feeding device solves the problems that the sturgeon feed feeding device in the prior art is easy to cause feed loss, the feed intake of each sturgeon cannot be counted, and scientific and accurate feeding data cannot be provided for sturgeon culture.

Preferably, the PIT transceiver and the antenna are arranged at the tail end of the material conveying pipe, and the PIT tag is implanted into muscles on the back side above the pectoral fin of the sturgeon. The PIT transceiver and the antenna are arranged at the tail end of the material conveying pipe and are close to the feeding nozzle as much as possible, so that the accuracy of PIT label identification can be improved; and implant the PIT label in the muscle of sturgeon pectoral fin top back one side, firstly this department is close to the sturgeon head, and is close with feeding the mouth distance when ingesting, secondly the PIT label is implanted this department and does not influence the normal activity of sturgeon, and the PIT label is difficult to withdraw from extracorporeally simultaneously, and the reliability is high.

Preferably, material feeding unit includes the feeding motor, the feeding motor locate the top of fodder jar, the feeding motor passes through the output shaft and links to each other with the pay-off auger that sets up in fodder jar discharge gate below, the upper portion of storage silo is equipped with fodder detection device, fodder detection device and control system link to each other. In order to ensure that the feed at the bottom of the storage bin has a certain pressure, the feed in the storage bin needs to be kept at a certain height (namely equivalent storage amount), so that the feed detection device is arranged at the upper part of the storage bin, and the feeding device is started to supplement the feed in time when the bin level descends. The fodder detection device can adopt a light emitting device and a light receiving device which are arranged on two opposite sides of the storage bin, when the light receiving device can receive light rays emitted by the light emitting device, the cavity appears on the upper portion of the storage bin, and the fodder needs to be supplemented by starting the feeding device.

Preferably, the feeding nozzle comprises a squeezing part at the front end and an expansion part located at the rear end of the squeezing part, the squeezing part is connected with the expansion part through a necking part, the squeezing part is in a flat ellipsoid shape, the transverse width of the squeezing part is larger than the vertical height, the upper surface and the lower surface of the squeezing part form a flat surface, a transversely-arranged material outlet seam is arranged on the front end surface of the squeezing part, and the squeezing switch is arranged on the flat surface of the squeezing part. The extrusion part at the front end of the feeding mouth is used for sturgeon to bite, and the shape of the extrusion part is similar to that of the head and the front half of the fish, so that the feeding mouth has a better food calling effect; in addition, the flat ellipsoidal structure is beneficial to entering the mouth of the sturgeon; the discharge slot transversely arranged at the front end of the extrusion part is automatically opened by the extrusion of the feed in the feeding mouth when the sturgeon bites the feed and extrudes, and is automatically closed by the resilience force of the elastic material of the feeding mouth when the extrusion force disappears, so that the feed is ensured not to be lost. The inflation portion of extrusion portion rear end is used for inflation when extrusion portion pressurized, holds the fodder of part rearward movement when extrusion portion pressurized, contracts when the extrusion force disappears simultaneously, can push forward the fodder in order to supply the extrusion portion by the fodder of extruding rapidly, ensures the fodder volume of being extruded when sturgeon bites the food once more.

Preferably, an elastic membrane which bulges upwards is arranged above the upper flat surface of the extrusion part, a flat gap is formed between the elastic membrane and the upper flat surface of the extrusion part, conductive thin films are arranged on the elastic membrane and the upper flat surface on the upper side and the lower side of the gap, and the conductive thin films which are oppositely arranged form the extrusion switch. Conductive films are arranged on the upper flat surfaces of the bulged elastic film and the extrusion part, and when the extrusion part is extruded, the conductive films oppositely arranged up and down touch each other, and the extrusion switch is closed; when the pressure of the extrusion part disappears, the conductive films which are oppositely arranged up and down are mutually separated under the action of the elastic force of the elastic film, and the extrusion switch is switched off.

Preferably, the fodder jar is vertically cylindricly of putting, and its upper and lower both ends all are equipped with the conical surface, material feeding unit include a pipe, the diameter of fodder jar is greater than material feeding unit's diameter, the setting of pay-off auger in the pipe, the connecting portion outside of fodder jar and material feeding unit is formed with the mooring portion, control system set up the top at the fodder jar. The mooring part can be used for fixing the relative position of the feeding device, so that the feeding device is positioned at a certain fixed position on the water surface, and the feeding device is prevented from drifting along with water flow. The control system is arranged at the top of the feed tank, and the control panel is positioned above the water surface, so that workers can conveniently perform on-site control operation and read related ingestion data, and the control system can be conveniently connected with a shore control center to perform remote control and other operations.

Preferably, the tail end of the conveying pipe is provided with a mounting box, a feed channel is arranged in the mounting box, the conveying pipe is connected with the feeding nozzle through the mounting box, the feeding nozzle is fixed on the box body of the mounting box, the feed channel is internally provided with a one-way valve, the PIT transceiver is arranged in the mounting box, and an antenna of the PIT transceiver is arranged outside the mounting box. The one-way valve only allows feed to move in one direction, and when the feeding mouth is squeezed, feed reverse movement is avoided, ensuring that more feed is squeezed out of the feeding mouth and ingested by the sturgeon. And the antenna of the PIT transceiver is arranged outside the mounting box and can be further close to the feeding nozzle.

Preferably, the sound player is further arranged in the mounting box, the top of the mounting box is provided with the food calling box, the food calling box is internally provided with the food calling agent, and the box cover of the food calling box is provided with the food calling agent releasing hole. Sturgeons are relatively degraded in vision due to the culture environment, but have relatively sharp hearing ability. Sturgeons can acutely sense weak sound in water, although the sturgeons do not have external ears and only have the internal ears directly connected with auditory nerves. According to the characteristics of sturgeons, the small sound player is arranged in the mounting box, and after a period of domestication, music is played in the feed feeding process, so that the bait feeding effect is good. The phagostimulant can gather sturgeons around the feeding mouth rapidly, so that the probability of sturgeon biting the feeding mouth can be further increased, and the feeding is accelerated to improve the feeding effect. The phagostimulant is mainly prepared from amino acid, alkaloid, nucleotide or sulfur-containing organic matters, is compressed into small pieces through an adhesive, and can be put into a phagostimulant box, and the specific formula and the processing technology are applied for additional patent. The phagostimulant release holes can slowly release smell to attract sturgeons to ingest.

The storage silo is cylindricly, divide the magazine to rotationally connect in the bottom of storage silo, the junction of storage silo and branch magazine is equipped with and is used for driving the rotatory rotating electrical machines of branch magazine, rotating electrical machines pass through the reduction gear and be connected with the transmission of branch magazine, the terminal portion of conveying pipeline is the structure of buckling, rotating electrical machines during operation, the feed mouth set up in the terminal extending direction of conveying pipeline, feed about the mouth both sides and the left and right sides all be equipped with the simulation fin of flexible construction. Relevant studies have shown that sturgeons have a significant feeding tendency towards fish-shaped objects in an active state. The rotating motor can drive the material distribution box and the material conveying pipe connected with the material distribution box to slowly rotate, so that the feeding nozzle of the front half of a similar fish can slowly move in water, and the simulated pectoral fins, dorsal fins and ventral fins on the upper side, the lower side, the left side and the right side of the feeding nozzle continuously float under the action of water flow, and the feeding effect on sturgeons can be further improved. The invention adopts a slow rotation mode, so that the feeding of sturgeons is not influenced, and meanwhile, the material distributing box can rotate in the positive direction (the feeding mouth moves forwards) or in the reverse direction (the feeding mouth moves backwards) to play a food calling effect. The electric equipment is direct-current low-voltage equipment without potential safety hazard and adopts a waterproof structure.

Preferably, the feeding port is provided with a cover plate, and the cover plate is provided with a solar cell panel. The cover plate can prevent rainwater and the like from entering the feed opening, and the solar cell panel can provide energy for the device.

The control method of the sturgeon underwater feeding device capable of measuring food intake comprises the following steps:

a. opening a discharge port at the bottom of the feed tank, starting a feeding motor, and feeding the feed in the feed tank into a storage bin through a feeding auger and into a feeding nozzle through a material distribution box and a material conveying pipe;

b. when the extrusion switch is closed, the control system controls the PIT transceiver to send a signal to activate the PIT tag arranged on the sturgeon body through the antenna, the circuit in the PIT tag is electrified to send the sturgeon code back to the PIT transceiver, the PIT transceiver transmits the received sturgeon code to the control system through the connecting line, the control system multiplies the average amount of feed produced by extruding the feeding mouth each time by the extrusion times according to the received sturgeon code and the corresponding extrusion switch closing times, and the feed intake of each sturgeon in a certain time period can be calculated, wherein the average amount of feed is calculated by dividing the total amount of feed consumed in the previous time period by the accumulated closing times of the extrusion switch in the time period.

Preferably, in the process of feeding the feed, the music is played through a sound player in the mounting box, and meanwhile, the rotating motor drives the material distribution box and the material conveying pipe connected with the material distribution box to rotate slowly.

The invention has the beneficial effects that: the underwater sturgeon feeding device has the characteristics of high feed utilization rate and capability of counting the feed intake of each sturgeon, thereby providing scientific and accurate feeding data for the culture of the sturgeons, and has very high practical value.

Drawings

FIG. 1 is a schematic view of an underwater sturgeon feeding device according to the present invention;

FIG. 2 is a schematic view of another configuration of the underwater sturgeon feeding device of the present invention;

fig. 3 is a partial structural sectional view of a feeding mounting box and a feeding nozzle of the underwater sturgeon feeding device.

In the figure: 1. the feeding device comprises a feeding tank, 2, a feeding port, 3, a discharging port, 4, a feeding device, 5, a storage bin, 6, a material distributing box, 7, a conveying pipe, 8, a feeding nozzle, 9, an extrusion switch, 10, a control system, 11, an antenna, 12, a feeding motor, 13, a feeding packing auger, 14, an extrusion part, 15, an expansion part, 16, a necking part, 17, a discharging gap, 18, an elastic membrane, 20, a mooring part, 21, a mounting box, 22, a feeding box and 23, a rotating motor.

Detailed Description

The following is a further description of embodiments of the present invention by way of examples and with reference to the accompanying drawings.

Example 1

In embodiment 1 shown in fig. 1, an underwater sturgeon feeding device capable of measuring food intake comprises a feed tank 1 suspended on the water surface, a feed inlet 2 is arranged at the top end of the feed tank, a cover plate is arranged on the feed inlet, and a solar cell panel (not shown in the figure) is arranged on the cover plate. The discharge gate 3 that the feed tank bottom has the valve links to each other with material feeding unit 4's feed inlet, material feeding unit includes feeding motor 12, feeding motor locate the top of feed tank, feeding motor passes through the output shaft and links to each other with the pay-off auger 13 that sets up in feed tank discharge gate below, material feeding unit's discharge gate is connected with the top of a storage silo 5 of a tubular structure, the upper portion of storage silo is equipped with fodder detection device, the bottom of storage silo be equipped with and divide magazine 6, divide magazine and 4 conveying pipelines 7 that are radial arrangement to be connected, the conveying pipeline from high to low slope setting on the fodder flow direction, the inclination of this embodiment is 20 degrees, the end of conveying pipeline is equipped with feeding mouth 8 of soft elastic rubber or silica gel material preparation, the colour of feeding mouth is for having the red or blue of food calling effect to the fish, is equipped with extrusion switch 9 on the sturgeon mouth (see figure 3), sturgeon of food intake of can counting is thrown something and feed device under water still includes control system 10 and PIT mark system, and PIT mark system includes PIT transceiver, antenna 11 and PIT label, PIT transceiver and antenna setting at the terminal portion of conveying pipeline, PIT label preset in the muscle of sturgeon pectoral fin top back one side, material feeding unit, fodder detection device, extrusion switch and PIT mark system all link to each other with control system.

The feeding nozzle comprises a squeezing part 14 at the front end and an expansion part 15 located at the rear end of the squeezing part, the squeezing part is connected with the expansion part through a necking part 16, the squeezing part is in a flat ellipsoid shape, the transverse width of the squeezing part is larger than the vertical height, the upper surface and the lower surface of the squeezing part form a flat surface, a discharging gap 17 which is transversely arranged is formed in the front end surface of the squeezing part, and a squeezing switch is arranged on the flat surface of the squeezing part. An elastic membrane 18 which is bulged upwards is arranged above the upper flat surface of the extrusion part, a flat gap is formed between the elastic membrane and the upper flat surface of the extrusion part, conductive thin films (not shown in the figure) are arranged on the elastic membrane and the upper flat surface on the upper side and the lower side of the gap, and the conductive thin films which are oppositely arranged from top to bottom form the extrusion switch.

The fodder jar is the cylindric of erectting putting, and both ends all are equipped with the conical surface about it, material feeding unit include a pipe, the diameter of fodder jar is greater than material feeding unit's diameter, the setting of pay-off auger in the pipe, the connecting portion outside of fodder jar and material feeding unit is formed with mooring portion 20, control system set up the top at the fodder jar. The end of conveying pipeline is equipped with mounting box 21, is equipped with the fodder passageway in the mounting box, and the conveying pipeline passes through the mounting box and feeds and eat the mouth and be connected, feed and eat the mouth and fix on the box body of mounting box, the fodder passageway in be equipped with check valve (not drawn in the picture), the PIT transceiver set up in the mounting box, the loop antenna setting of PIT transceiver is close to and feeds and eat mouth one side in the mounting box outside. The top of the mounting box is provided with a food calling box 22, a food calling agent is arranged in the food calling box, and a box cover of the food calling box is provided with a food calling agent release hole.

Example 2

In embodiment 2 as shown in fig. 2, the storage silo is cylindrical, the distributing box is rotatably connected to the bottom of the storage silo, a rotating motor 23 used for driving the distributing box to rotate is arranged at the joint of the storage silo and the distributing box, the rotating motor is in transmission connection with the distributing box through a speed reducer, the tail end of the conveying pipe is of a 90-degree bending structure, when the rotating motor works, the feeding nozzle is arranged in the extending direction of the tail end of the conveying pipe, the upper side, the lower side, the left side and the right side of the feeding nozzle are provided with simulated fins (not shown in the figure) of flexible structures, and a sound player (not shown in the figure) is further arranged in the mounting box.

Example 2 a method of controlling a feed delivery device, comprising the steps of, in addition to the method of example 1:

in the process of feeding the feed, music is played through a sound player in the mounting box, and meanwhile, the rotating motor drives the material distributing box and the material conveying pipe connected with the material distributing box to rotate slowly.

The invention is provided with a PIT marking system, PIT labels are preset in the cultured sturgeons, and the PIT labels preset in the sturgeons can be identified through the PIT marking system, so that the aims of identifying each sturgeon and counting the food intake of each sturgeon are fulfilled. The sturgeon feed in the feed tank is connected with the material distribution box through the feeding device and the storage bin, the feeding device is used for feeding the feed into the storage bin, the storage bin has a certain height, so that the feed at the bottom of the storage bin has a certain pressure, and meanwhile, the feed conveying pipe is obliquely arranged from high to low in the flow direction of the feed, so that the feed can smoothly enter the feeding nozzle through the material distribution box and the feed conveying pipe; the feeding mouth made of the soft elastic material generates an extrusion effect when the sturgeon bites the mouth, so that the feed in the feeding mouth is extruded and is ingested by the sturgeon. Feed and eat and be equipped with the extrusion switch on the mouth, bite at sturgeon and eat the extrusion when feeding the mouth, the extrusion switch is closed, open the PIT mark system through control system and discern the internal PIT label of sturgeon that presets, will feed and eat the sturgeon code record that the mouth is correspond by extruded number of times and PIT label, can count out every sturgeon and bite the number of times of eating the mouth in certain period, thereby the average extrusion capacity of fodder when feeding the mouth and being extruded at every turn calculates out every sturgeon's food intake. In addition, the opening of the feeding nozzle is opened when being squeezed, and the opening is automatically closed when the squeezing force disappears, so that the feed cannot be lost. Therefore, the sturgeon underwater feeding device solves the problems that the sturgeon feed feeding device in the prior art is easy to cause feed loss, the feed intake of each sturgeon cannot be counted, and scientific and accurate feeding data cannot be provided for the culture of the sturgeons.

In addition to the above-mentioned embodiments, the technical features or technical data of the present invention may be reselected and combined to form new embodiments within the scope disclosed in the claims and the specification of the present invention, and the embodiments of the present invention not described in detail can be easily implemented by those skilled in the art without creative efforts, so the embodiments not described in detail should be regarded as specific embodiments of the present invention and are within the protection scope of the present invention.

Claims

1. A sturgeon underwater feeding device capable of measuring food intake is characterized by comprising a feed tank (1) suspended on the water surface, wherein a feeding port (2) is formed in the top end of the feed tank, a discharge port (3) with a valve at the bottom of the feed tank is connected with a feed inlet of a feeding device (4), the discharge port of the feeding device is connected with the top of a storage bin (5), a material distributing box (6) is arranged at the bottom of the storage bin, the material distributing box is connected with a plurality of material conveying pipes (7) which are radially arranged, the material conveying pipes are arranged in a feed flowing direction from high to low in an inclined mode, a feeding nozzle (8) made of a soft elastic material is arranged at the tail end of each material conveying pipe, an extrusion switch (9) is arranged on each feeding nozzle, the sturgeon-underwater feeding device capable of measuring food intake further comprises a control system (10) and a PIT marking system, each PIT marking system comprises a PIT transceiver, an antenna (11) and a PIT label, the PIT label is preset in the sturgeon body, and the feeding device, the extrusion switch and the PIT marking system are all connected with the control system; when the extrusion switch is closed, the control system controls the PIT transceiver to send a signal to activate the PIT tag arranged on the sturgeon body through the antenna, the circuit in the PIT tag is electrified and then sends the sturgeon code back to the PIT transceiver, the PIT transceiver transmits the received sturgeon code to the control system through the connecting line, the control system multiplies the average amount of feed produced by extruding the feeding mouth every time by the extrusion times according to the received sturgeon code and the corresponding extrusion switch closing times, and the feed intake of each sturgeon in a certain period can be calculated.

2. An underwater sturgeon feeding device capable of measuring food intake according to claim 1, wherein the PIT transceiver and antenna are disposed at the end of the feed delivery pipe, and the PIT tag is implanted in the muscle on the back side above the pectoral fin of the sturgeon.

3. The underwater sturgeon feeding device capable of measuring food intake according to claim 1, wherein the feeding device comprises a feeding motor (12), the feeding motor is arranged at the top of the feed tank, the feeding motor is connected with a feeding auger (13) arranged below a discharge port of the feed tank through an output shaft, a feed detection device is arranged at the upper part of the storage bin, and the feed detection device is connected with a control system.

4. The sturgeon underwater feeding device capable of measuring food intake according to claim 1, wherein the feeding mouth comprises a squeezing portion (14) at the front end and an expansion portion (15) located at the rear end of the squeezing portion, the squeezing portion is connected with the expansion portion through a necking portion (16), the squeezing portion is in a flat ellipsoid shape, the transverse width of the squeezing portion is larger than the vertical height, the upper surface and the lower surface of the squeezing portion form a flat surface, a transversely-arranged material outlet slot (17) is formed in the front end surface of the squeezing portion, and the squeezing switch is arranged on the flat surface of the squeezing portion.

5. The underwater sturgeon feeding device capable of measuring food intake according to claim 4, wherein an elastic membrane (18) which is raised upwards is arranged above the upper flat surface of the extrusion part, a flat gap is formed between the elastic membrane and the upper flat surface of the extrusion part, conductive films are arranged on the elastic membrane and the upper flat surface on the upper side and the lower side of the gap, and the conductive films arranged oppositely from each other from top to bottom form the extrusion switch.

6. A sturgeon underwater feeding device capable of measuring food intake according to claim 3, characterized in that the feed tank is vertically cylindrical, tapered surfaces are arranged at the upper end and the lower end of the feed tank, the feeding device comprises a round pipe, the diameter of the feed tank is larger than that of the feeding device, the feeding auger is arranged in the round pipe, a mooring part (20) is formed outside the connecting part of the feed tank and the feeding device, and the control system is arranged at the top of the feed tank.

7. A sturgeon underwater feeding device capable of measuring food intake according to claim 2, characterized in that a mounting box (21) is arranged at the end of the feed delivery pipe, a feed passage is arranged in the mounting box, the feed delivery pipe is connected with a feeding nozzle through the mounting box, the feeding nozzle is fixed on the box body of the mounting box, a one-way valve is arranged in the feed passage, the PIT transceiver is arranged in the mounting box, and an antenna of the PIT transceiver is arranged outside the mounting box.

8. The underwater sturgeon feeding device capable of measuring food intake according to claim 7, wherein a sound player is further arranged in the mounting box, a food calling box (22) is arranged at the top of the mounting box, a food calling agent is filled in the food calling box, and a food calling agent releasing hole is formed in a box cover of the food calling box.

9. An underwater sturgeon feeding device capable of measuring food intake according to any one of claims 1 to 8, wherein the storage bin is cylindrical, the dispensing box is rotatably connected to the bottom of the storage bin, a rotating motor (23) for driving the dispensing box to rotate is arranged at the joint of the storage bin and the dispensing box, the rotating motor is in transmission connection with the dispensing box through a speed reducer, the tail end of the conveying pipe is of a bent structure, when the rotating motor works, the feeding nozzle is arranged in the extending direction of the tail end of the conveying pipe, and the upper side, the lower side, the left side and the right side of the feeding nozzle are provided with simulated fins of flexible structures.

10. A method of controlling an underwater feeding device for sturgeons with a gaugeable diet according to claim 9, comprising the steps of: