Benthic invertebrate screening device and screening method based on ultrasonic waves

Abstract

The invention discloses a benthic invertebrate screening device based on ultrasonic waves. The benthic invertebrate screening device comprises a pre-screening bin; an ultrasonic assembly I; a plurality of high-definition cameras I; a display screen I; a controller I; a main screening bin; an ultrasonic assembly II; a plurality of high-definition cameras II; a controller II; the flushing assembly comprises at least two nozzles which are detachably arranged at the top of the main screening bin; and a pump. The invention further provides a screening method applying the benthic invertebrate screening device based on the ultrasonic waves, according to the screening method, the marine benthic invertebrates in the samples can be accurately and efficiently screened, damage to the marine benthic invertebrates caused by manual sorting is effectively avoided, and the screening efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of benthic invertebrate screening, and particularly to an ultrasonic-based benthic invertebrate screening device and a screening method. Background Art

[0002] In the fields of marine water ecological research, aquaculture, and environmental monitoring, etc., it is often necessary to accurately screen benthic invertebrates in water bodies. Traditional screening methods mainly rely on net fishing and manual sorting. These methods are not only inefficient but also easily cause damage to marine benthic invertebrates, affecting subsequent research and applications. The application of ultrasonic technology in the biological field provides a new idea for benthic invertebrate screening, but there is currently no perfect ultrasonic-based screening device and efficient screening method to meet the actual needs.

[0003] In summary, there is an urgent need for an ultrasonic-based benthic invertebrate screening device and a screening method to efficiently and safely screen benthic invertebrates. Summary of the Invention

[0004] One object of the present invention is to solve at least the above problems and provide at least the advantages described later.

[0005] Another object of the present invention is to provide an ultrasonic-based benthic invertebrate screening device.

[0006] Another object of the present invention is to provide a screening method using the ultrasonic-based benthic invertebrate screening device. This screening method can perform precise and efficient screening operations on benthic invertebrates in a sample, effectively avoiding damage to benthic invertebrates caused by manual sorting, and improving the screening efficiency. In the screening method provided by the present invention, the ultrasonic-based benthic invertebrate separation device is fully utilized to pre-screen and finally precisely screen benthic invertebrates in the sample. There is no need for manual sorting operations, which will not cause damage or loss of benthic invertebrates in the sample, effectively improving the sorting accuracy and maximizing the guaranteed sorting quantity.

[0007] To achieve these and other advantages of the present invention, an ultrasonic-based benthic invertebrate screening device is provided, including the following steps:

[0008] Pre-screening bin, which is a receiving cavity with openings at both ends; a pair of end screens I, which are detachably arranged at the openings at both ends of the pre-screening bin; a pair of longitudinal screens, which are arranged along the length direction of the pre-screening bin in the middle of the pre-screening bin, dividing the pre-screening bin into three independent spaces; a plurality of transverse screens, which are evenly spaced within a pair of longitudinal screens to form a plurality of screening baskets I between the pair of longitudinal screens and the plurality of transverse screens. A screening basket I relatively close to one end of the pre-screening bin is the sample basket I, and the remaining plurality of screening baskets I are a plurality of step-by-step screening baskets I. And from one end of the pre-screening bin to the other end of the pre-screening bin, the aperture of the screening holes of the plurality of step-by-step screening baskets I gradually decreases, and the aperture of the screening holes of the pair of end screens I is smaller than the aperture of the screening holes of the screening basket I with the smallest aperture among the plurality of step-by-step screening baskets I; a screening basket cover I, which is detachably buckled on the upper openings of the plurality of screening baskets I; an ultrasonic component I, which is arranged in the sample basket, and the ultrasonic emission end I of the ultrasonic component I extends into the water body in the sample basket; a plurality of high-definition cameras I, which are respectively arranged above the plurality of screening baskets I; a display screen I, which is communicatively connected with the plurality of high-definition cameras I; a controller I, which is communicatively connected with the ultrasonic component I, the plurality of high-definition cameras I and the display screen I. The controller I is used to control the start of the ultrasonic component I to emit ultrasonic waves of different frequencies and different intensities. The controller I is also used to control the start of the plurality of high-definition cameras I and the display screen I;

[0009] Main screening bin, which is a receiving cavity with two side openings corresponding to each other at both ends; a pair of end screens II, which are respectively detachably arranged on the two side openings; a plurality of screening baskets II, which are arranged in a nested manner from large to small in sequence, and the aperture of the screening holes of the plurality of screening baskets II nested from large to small in sequence increases in sequence. The side walls between adjacent two screening baskets II among the plurality of screening baskets II do not contact each other. The relatively smallest screening basket II is the sample basket II, and the remaining plurality of screening baskets II are step-by-step screening baskets II; a screening basket cover II, which is detachably buckled on the plurality of screening baskets II; an ultrasonic component II, which includes a plurality of ultrasonic emission ends II arranged dispersedly on the sample basket II, and the plurality of ultrasonic emission ends II all extend into the water body in the sample basket II; a plurality of high-definition cameras II, which are respectively arranged above the plurality of screening baskets II; a display screen II, which is communicatively connected with the plurality of high-definition cameras; a controller II, which is communicatively connected with the ultrasonic component II, the plurality of high-definition cameras II and the display screen II. The controller II is used to control the start of the ultrasonic component II to emit ultrasonic waves of different frequencies and different intensities. The controller II is also used to control the start of the plurality of high-definition cameras II and the display screen II; and

[0010] Flushing component, which includes at least two nozzles, which are detachably arranged on the top of the main screening bin, and the front ends of the at least two nozzles extend into the sample basket II; a pump, whose water outlet end is connected to the at least two nozzles through a water pipe, and the water inlet end of the pump is connected to a water inlet pipe.

[0011] Preferably, in the pre-screening bin, on both sides of a pair of longitudinal sieves are two water flow channels, and among them, the width of any one water flow channel is less than the vertical distance between the pair of longitudinal sieves.

[0012] Preferably, the spacing distance between the side wall of the sample basket Ⅱ and the side wall of an adjacent step-by-step screening frame Ⅱ is A, and the spacing distance between two adjacent step-by-step screening frames Ⅱ is B, and A > B.

[0013] Preferably, the bottoms of multiple screening baskets Ⅱ do not contact each other, and the bottoms of multiple screening baskets Ⅱ are respectively spaced apart by multiple U-shaped support rods.

[0014] Preferably, it further includes: a bottom bin, which is a hollow structure bin, and the bottom bin further includes a water inlet, which is arranged at the upper end of the bottom bin; a drain outlet, which is arranged on the side wall near the bottom of the bottom bin;

[0015] a water outlet, which is opened at the bottom of the main screening bin, the main screening bin is detachably placed on the bottom bin, and the water outlet of the main screening bin is arranged directly opposite the water inlet of the bottom bin;

[0016] a valve, which is arranged at the water outlet;

[0017] a drain pipe, one end of which is communicated with the drain outlet of the bottom bin, and the other end of the drain pipe extends outward.

[0018] Preferably, it further includes: multiple support legs, which are respectively arranged on the side walls of the pre-screening bin and the main screening bin, and the multiple support legs on the main screening bin do not contact the bottom bin;

[0019] multiple lifting rings, which are respectively arranged on the side walls of the pre-screening bin and the main screening bin.

[0020] Preferably, it further includes:

[0021] Door Ⅰ, which is opened on the side wall of the pre-screening bin, and the specification of Door Ⅰ is larger than that of any one longitudinal sieve, and any one longitudinal sieve relatively close to Door Ⅰ is detachably arranged through a buckle;

[0022] Door Ⅱ, which is opened on the side wall of the pre-screening bin, and the specification of Door Ⅱ is larger than that of the relatively outermost screening frame Ⅱ, and multiple first side walls of multiple screening frames Ⅱ relatively close to Door Ⅱ are all detachably arranged through buckles and can be opened step by step.

[0023] A screening method using a benthic invertebrate screening device based on ultrasonic waves includes the following steps:

[0024] Step 1: Pretreat the collected samples containing benthic invertebrates.

[0025] Step 2: Place the pre-treated sample in the pre-screening bin, and place the pre-screening bin in the water body at the sample collection site, and let the water flow into one end of the pre-screening bin and flow out from the other end of the pre-screening bin. Then, control the ultrasonic component I to start by the controller I, and control to adjust the ultrasonic frequency and the vibration power of the ultrasonic wave at least once every 5 minutes. The controller I obtains the image information collected by multiple high-definition cameras in real time, and analyzes and compares the images with the benthic invertebrate classification data pre-stored in the controller I to obtain a comparison result. Based on the comparison result, obtain the types and quantities of benthic invertebrates in the sample, screen and record the ultrasonic frequency and vibration power parameters corresponding to different types of benthic invertebrates, and the corresponding ultrasonic action time period;

[0026] Step 3: Repeat steps 1 to 2 three times to obtain a data set of relatively optimal ultrasonic frequency and vibration power parameters, and the corresponding ultrasonic action time period;

[0027] Step 4: Pre-store the data set of relatively optimal ultrasonic frequency and vibration power parameters, and the corresponding ultrasonic action time period into the controller II;

[0028] Step 5: Repeat step 1;

[0029] Step 6: Place the sample collected in step 5 in the main screening bin, and place the main screening bin in the water body at the sampling point of the sample, and let the water flow into one end of the main screening bin and flow out from the other end of the main screening bin. Start the sound wave generator by the controller II to emit ultrasonic waves according to the pre-stored data set;

[0030] Step 7: Take the main screening bin out of the water body after step 6. Then, start the flushing component to flush the sample for at least 5 minutes. After that, place the main screening bin back in the water body at the sampling point of the sample, and let the water flow into one end of the main screening bin and flow out from the other end of the main screening bin;

[0031] Step 8: Start the sound wave generator II by the controller II to emit ultrasonic waves according to the pre-stored data set;

[0032] Step 9: Take the main screening bin out of the water body in step 8, and take out or open multiple screening baskets II in turn, and collect the benthic invertebrates in the multiple screening baskets II in turn;

[0033] Step 10: Repeat steps 5 to 9 at least twice.

[0034] Preferably, in step 1, the pre-treatment of the sample is to remove the non-biological impurities in the sample.

[0035] Preferably, the frequency of the ultrasonic wave is 20 kHz - 50 kHz, and the vibration power of the ultrasonic wave is 100 w - 500 w.

[0036] The present invention has at least the following beneficial effects:

[0037] The benthic invertebrate separation device based on ultrasonic waves provided by the present invention can scientifically pre-screen samples to obtain optimized ultrasonic data, and then accurately and efficiently screen benthic invertebrates from a large number of samples through the main screening bin, effectively avoiding damage to benthic invertebrates caused by manual sorting and improving the screening efficiency. In the screening method provided by the present invention, the benthic invertebrate separation device based on ultrasonic waves is fully utilized to pre-screen and finally accurately screen benthic invertebrates from samples. There is no need for manual sorting operations, which will not cause damage or loss of benthic invertebrates in the samples, effectively improving the sorting accuracy and ensuring the sorting quantity to the greatest extent.

[0038] Other advantages, objectives, and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic top view structure diagram inside the pre-screening bin in an embodiment of the present invention;

[0040] Figure 2 It is a schematic top view structure diagram inside the main screening bin in an embodiment of the present invention;

[0041] Figure 3 It is a schematic side view structure diagram inside the main screening bin in an embodiment of the present invention;

[0042] Figure 4 It is a schematic side view structure diagram inside the main screening bin in another embodiment of the present invention;

[0043] Figure 5 It is a schematic structure diagram of the main screening bin and the bottom bin in another embodiment of the present invention;

[0044] Figure 6 It is a schematic side view structure diagram of the main screening bin and the bottom bin in another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The following further describes the present invention in detail with reference to the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0046] It should be understood that terms such as "having", "comprising", and "including" used herein do not preclude the presence or addition of one or more other elements or their combinations.

[0047] Such as Figure 1 、2 As shown in FIGS. 1 and 3, the present invention provides an ultrasonic-based benthic invertebrate screening device, including the following steps:

[0048] A pre-screening bin 10, which is a receiving cavity with openings at both ends; a pair of end screens I, which are detachably arranged at the openings at both ends of the pre-screening bin; a pair of longitudinal screens 101, which are arranged along the length direction of the pre-screening bin in the middle of the pre-screening bin, dividing the pre-screening bin into three independent spaces; a plurality of transverse screens 102, which are evenly spaced within a pair of longitudinal screens to form a plurality of screening baskets I between the pair of longitudinal screens and the plurality of transverse screens. A screening basket I relatively close to one end of the pre-screening bin is a sample basket I 103, and the remaining plurality of screening baskets I are a plurality of step-by-step screening baskets I 104. And from one end of the pre-screening bin to the other end of the pre-screening bin, the pore diameters of the screening holes of the plurality of step-by-step screening baskets I gradually decrease, and the pore diameters of the screening holes of the pair of end screens I are smaller than the pore diameters of the screening holes of the screening basket I with the smallest pore diameter among the plurality of step-by-step screening baskets I; a screening basket cover I, which is detachably buckled on the upper openings of the plurality of screening baskets I; an ultrasonic component I 105, which is arranged in the sample basket, and the ultrasonic emission end I 1051 of the ultrasonic component I extends into the water body in the sample basket; a plurality of high-definition cameras

[0049] I 106, which are respectively arranged above the plurality of screening baskets I; a display screen I 107, which is communicatively connected with the plurality of high-definition cameras I; a controller I 108, which is communicatively connected with the ultrasonic component I, the plurality of high-definition cameras I and the display screen I. The controller I is used to control the start of the ultrasonic component I to emit ultrasonic waves of different frequencies and different intensities. The controller I is also used to control the start of the plurality of high-definition cameras I and the display screen I; before the start of pre-screening, data on the types and size ranges of common benthic invertebrates in the target water body and the corresponding approximate ultrasonic data ranges can be consulted and pre-stored in the database in the controller I to provide a data basis and a comparison and analysis library for pre-screening and improve the pre-screening efficiency; in the pre-screening bin, a plurality of step-by-step screening baskets I are provided to promote the step-by-step diffusion of benthic invertebrates in one direction, quickly obtain the screening results, and improve the optimization efficiency of ultrasonic data;

[0050] The main screening bin 20 has two accommodating cavities with side openings at both ends thereof; a pair of end screens II, which are respectively detachably arranged on the two side openings; the pair of end screens II facilitate the entry of water into the main screening bin. A plurality of screening baskets II 201 are arranged in a nested manner from large to small in sequence, and the pore diameters of the screens of the plurality of screening baskets II arranged in a nested manner from large to small increase in sequence. The side walls between any two adjacent screening baskets II among the plurality of screening baskets II do not contact each other. The relatively smallest screening basket II is the sample basket II 2011, and the remaining plurality of screening baskets II are step-by-step screening baskets II 2012; a screening basket cover II, which is detachably buckled on the plurality of screening baskets II; an ultrasonic component II 202, which includes a plurality of ultrasonic transmitting ends II 2021 arranged dispersedly on the sample basket II, and the plurality of ultrasonic transmitting ends II all extend into the water body of the sample basket II; a plurality of high-definition cameras II 203, which are respectively arranged above the plurality of screening baskets II; a display screen II 204, which is communicatively connected to the plurality of high-definition cameras II; a controller II 205, which is communicatively connected to the ultrasonic component II, the plurality of high-definition cameras II and the display screen II. The controller II is used to control the activation of the ultrasonic component II to emit ultrasonic waves of different frequencies and different intensities, and the controller II is also used to control the activation of the plurality of high-definition cameras II and the display screen II; and a flushing component 30, which includes at least two nozzles 301, which are detachably arranged on the top of the main screening bin, and the front ends of the at least two nozzles extend into the sample basket II; a pump 302, whose water outlet end is connected to the at least two nozzles through a water pipe, and the water inlet end of the pump is connected to a water inlet pipe.

[0051] In this solution, the pre-screening bin is used for pre-screening benthic invertebrates in different samples. The pre-screening bin cooperates with the ultrasonic component I and the controller I to pre-detect and optimize the frequency and intensity of the ultrasonic waves of the ultrasonic component I, so as to prepare for the accurate screening of the main multiple samples in the subsequent main screening bin, and effectively improve the screening efficiency.

[0052] During the pre-screening process, the real-time reactions of benthic invertebrates, such as movement direction and speed changes, can be observed manually through the display screen I to assist in optimizing the ultrasonic data and assisting in controlling the pre-screening process; the plurality of high-definition cameras I and the display screen I are also used to monitor whether the equipment is operating normally to ensure the smooth progress of the pre-screening process.

[0053] The main screening bin is used to further screen benthic invertebrates from a large - area sample of the water body to be tested. During the screening process, first place the sample in sample basket II. Then, place the main screening bin in a water body with a certain flow rate. Each layer of sieve frame II has sieve holes with specific pore sizes. So, under the action of water flow and ultrasonic waves, benthic invertebrates of different specifications are screened step by step. When ultrasonic waves act on the main screening bin in the water body, the sediment in the sample in the water body gradually shakes off the benthic invertebrates. The benthic invertebrates also move towards the peripheral step - by - step sieve frames II under the driving or interfering action of ultrasonic waves until they reach a sieve frame II through which they cannot pass, so as to achieve the purpose of screening benthic invertebrates. And during this process, the separated sediment will also be washed into the water body by the water flow. With the cooperation of multiple high - definition cameras II and a display screen II, it is further convenient for manual observation of the screening effect;

[0054] The flushing component is used to further process the sample that has been treated by ultrasonic waves for a certain time, so as to separate the residual sample and the benthic invertebrates in it, ensuring a more thorough screening effect.

[0055] In summary, the benthic invertebrate separation device based on ultrasonic waves provided by the present invention can scientifically pre - screen the sample to obtain optimized ultrasonic data, and then use the main screening bin to accurately and efficiently screen benthic invertebrates from a large number of samples, effectively avoiding damage to benthic invertebrates caused by manual sorting and improving the screening efficiency. In a preferred embodiment, in the pre - screening bin, both sides of a pair of longitudinal sieves are two water flow channels, and the width of any one of the water flow channels is less than the vertical distance between the pair of longitudinal sieves. The two water flow channels facilitate the passage of water flow, enabling the water flow environment in the pre - screening bin to always maintain the same direction, while driving the sediment separated from the sample to quickly flow out of the pre - screening bin, assisting the benthic invertebrates to swim in one direction under the action of ultrasonic waves, and assisting in the effective screening of benthic invertebrates in the sample.

[0056] As Figure 3 shown, in a preferred embodiment, the distance between the side wall of sample basket II and the side wall of an adjacent step - by - step sieve frame II is A, and the distance between two adjacent step - by - step sieve frames II is B, and A > B. That is, the distance between the first step - by - step sieve frame II and sample basket II is relatively larger. All benthic invertebrates to be screened in the sample need to pass through this space and then move outwards. Therefore, this space is relatively large to provide a larger activity space for all benthic invertebrates to be screened in the sample, thereby promoting more effective screening.

[0057] As Figure 4As shown, in a preferred embodiment, the bottoms of multiple screening baskets II do not contact each other, and the bottoms of multiple screening baskets II are respectively spaced apart by multiple U-shaped support rods 2013. Since the bottoms of multiple screening baskets II do not contact each other, it further increases the screening activity space in one direction relative to the pre-screening bin, thereby further improving the screening efficiency.

[0058] As Figure 5 shown, in a preferred embodiment, it further includes: a bottom bin 40, which is a hollow structure bin. The bottom bin further includes a water inlet 401, which is arranged at the upper end of the bottom bin; a drain outlet 402, which is arranged on the side wall near the bottom of the bottom bin; a water outlet 206, which is opened at the bottom of the main screening bin. The main screening bin is detachably placed on the bottom bin, and the water outlet of the main screening bin is arranged directly opposite to the water inlet of the bottom bin; a valve 403, which is arranged at the water outlet; a drain pipe, one end of which is connected to the drain outlet of the bottom bin, and the other end of the drain pipe extends outward. In this solution, the bottom bin cooperates with the flushing assembly to accommodate the water sprayed from at least two nozzles and the impurities and sediment washed down from the sample, which is convenient for centralized treatment. The bottom bin can be disassembled, which is convenient for detaching the main screening bin from the bottom bin and placing it in the water body.

[0059] As Figure 6 shown, in a preferred embodiment, it further includes: multiple support legs 50, which are respectively arranged on the side walls of the pre-screening bin and the main screening bin, and the multiple support legs on the main screening bin do not contact the bottom bin; so as to support and fix the pre-screening bin and the main screening bin to prevent them from moving in the water body; multiple lifting rings 60, which are respectively arranged on the side walls of the pre-screening bin and the main screening bin.

[0060] In a preferred embodiment, it further includes: Door I, which is opened on the side wall of the pre-screening bin, and the specification of Door I is larger than that of any longitudinal screen. Any longitudinal screen relatively close to Door I is detachably arranged by a buckle; Door II, which is opened on the side wall of the pre-screening bin, and the specification of Door II is larger than that of the relatively outermost screening basket II. Multiple first side walls of multiple screening baskets II relatively close to Door II are all detachably arranged by buckles and can be opened step by step.

[0061] A screening method for an apparatus for screening benthic invertebrates based on ultrasonic waves, comprising the following steps:

[0062] Step 1: Pretreat the collected sample containing benthic invertebrates;

[0063] Step 2: Place the pre-treated sample in the pre-screening bin, place the pre-screening bin in the water body at the sample collection site, and let the water body flow into one end of the pre-screening bin and flow out from the other end. Then, control the ultrasonic component I to start by the controller I, and control the ultrasonic frequency and the vibration power of the ultrasonic wave to be adjusted at least every 5 minutes. The controller I obtains the image information collected by multiple high-definition cameras in real time, and analyzes and compares the images with the benthic invertebrate classification data pre-stored in the controller I to obtain a comparison result. Based on the comparison result, obtain the types and quantities of benthic invertebrates in the sample, screen and record the ultrasonic frequency and vibration power parameters corresponding to different types of benthic invertebrates, as well as the corresponding ultrasonic action time periods;

[0064] Step 3: Repeat steps 1 to 2 three times to obtain a dataset of relatively optimal ultrasonic frequency and vibration power parameters, as well as the corresponding ultrasonic action time periods;

[0065] Step 4: Pre-store the dataset of relatively optimal ultrasonic frequency and vibration power parameters, as well as the corresponding ultrasonic action time periods, into the controller II;

[0066] Step 5: Repeat step 1;

[0067] Step 6: Place the sample collected in step 5 in the main screening bin, place the main screening bin in the water body at the sampling point of the sample, and let the water body flow into one end of the main screening bin and flow out from the other end. Start the acoustic wave generator by the controller II to emit ultrasonic waves according to the pre-stored dataset;

[0068] Step 7: Detach the main screening bin from the water body after step 6. Then, start the flushing component to flush the sample for at least 5 minutes. After that, place the main screening bin back into the water body at the sampling point of the sample, and let the water body flow into one end of the main screening bin and flow out from the other end;

[0069] Step 8: Start the acoustic wave generator II by the controller II to emit ultrasonic waves according to the pre-stored dataset;

[0070] Step 9: Detach the main screening bin in step 8 from the water body, take out or open multiple sieve baskets II in turn, and collect the benthic invertebrates in multiple sieve baskets II in turn;

[0071] Step 10: Repeat steps 5 to 9 at least twice.

[0072] In this screening method, the benthic invertebrates in the sample are screened by making full use of the benthic invertebrate separation device based on ultrasonic waves, without the need for manual sorting operations, which will not cause damage and loss of benthic invertebrates in the sample, effectively improve the sorting accuracy, and maximize the guarantee of the sorting quantity.

[0073] In a preferred embodiment, the pre-treated sample in step one is to remove non-biological impurities from the sample. Among them, the non-biological impurities are large stones, branches, large plastic wastes, etc., and the basic parameters of the sample are further measured, including water temperature, pH value, turbidity, dissolved oxygen content, etc., and recorded.

[0074] In a preferred embodiment, the frequency of the ultrasonic wave is 20 kHz - 50 kHz, and the vibration power of the ultrasonic wave is 100 w - 500 w.

[0075] Example 1

[0076] The sample is collected from the river estuary.

[0077] The pre-screening bin is used to pre-screen the sample. The initial set ultrasonic data is that the frequency is 27 kHz - 35 kHz, the vibration power is 300 W - 500 W, and the waveform is a pulsed wave. The optimized data obtained after pre-screening is: the ultrasonic frequency is 28 kHz - 32 kHz, the vibration power of the ultrasonic wave is 400 W - 500 W, and the benthic invertebrate species obtained by screening are shellfish, crabs and polychaetes.

[0078] The main screening bin is used to screen 60 samples in sequence. In the final screening result, in the nested progressive screening frames II, shellfish, crabs and polychaetes are concentrated from the inside to the outside in sequence. The image recognition technology using multiple high-definition cameras II and controllers II is used to identify the species. It is statistically obtained that there are an average of 65 shellfish, 32 crabs and 145 polychaetes on average. After collecting the above benthic invertebrates, their body lengths and weights are measured manually to provide data for the ecological environment assessment of the estuary.

[0079] Example 2

[0080] The sample is collected from the coastline.

[0081] The pre-screening device is used to pre-screen the sample. The initial set vibration data is that the frequency is 20 Hz - 26 Hz, the vibration power is 200 W - 300 W, and the waveform is a pulsed wave. The optimized data obtained after pre-screening is: the vibration power is 18 Hz - 22 Hz, the vibration power is 250 W - 300 W, and the intertidal zone biological species obtained by screening the coastline are snails, shrimps and starfish.

[0082] The main screening bin is used to sequentially screen 80 samples. In the final screening result, in the gradually nested screening frames III arranged from inside to outside, snails, shrimps and starfishes are concentrated in sequence. Image recognition technology is used to identify the species by using multiple high-definition cameras III and controllers III. It is statistically obtained that there are an average of 80 snails, 45 shrimps and 28 starfishes, and the above benthic invertebrates are collected and their body lengths and weights are measured manually to provide data for the evaluation of the coastal ecological environment.

[0083] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. An ultrasonic-based screening device for benthic invertebrates, characterized in that, Including the following steps: A pre-screening bin, which is a receiving cavity with openings at both ends; A pair of end screen meshes I, which are detachably arranged at the openings at both ends of the pre-screening bin; a pair of longitudinal screen meshes, which are arranged along the length direction of the pre-screening bin in the middle of the pre-screening bin, dividing the pre-screening bin into three independent spaces; Multiple transverse screen meshes, which are evenly spaced within a pair of longitudinal screen meshes to form multiple screen baskets I between the pair of longitudinal screen meshes and the multiple transverse screen meshes. A screen basket I relatively close to one end of the pre-screening bin is the sample basket I, and the remaining multiple screen baskets I are multiple step-by-step screening baskets I. And from one end of the pre-screening bin to the other end of the pre-screening bin, the aperture of the screen holes of the multiple step-by-step screening baskets I gradually decreases, and the aperture of the screen holes of the pair of end screen meshes I is smaller than the aperture of the screen holes of the screening basket I with the smallest screen hole aperture among the multiple step-by-step screening baskets I; a screen basket cover I, which is detachably buckled on the upper openings of the multiple screen baskets I; an ultrasonic component I, which is arranged in the sample basket, and the ultrasonic emission end I of the ultrasonic component I extends into the water body in the sample basket; multiple high-definition cameras I, which are respectively arranged above the multiple screen baskets I; A display screen I, which is communicatively connected to the multiple high-definition cameras I; a controller I, which is communicatively connected to the ultrasonic component I, the multiple high-definition cameras I and the display screen I. The controller I is used to control the start of the ultrasonic component I to emit ultrasonic waves of different frequencies and different intensities. The controller I is also used to control the start of the multiple high-definition cameras I and the display screen I; A main screening bin, which is a receiving cavity with two side openings corresponding to both ends; A pair of end screen meshes II, which are respectively detachably arranged on the two side openings; multiple screen baskets II, which are arranged in a nested manner from large to small in sequence, and the aperture of the screen holes of the multiple screen baskets II nested from large to small in sequence increases in sequence. The side walls between adjacent two screen baskets II among the multiple screen baskets II do not contact each other. The relatively smallest screen basket II is the sample basket II, and the remaining multiple screen baskets II are step-by-step screening baskets II; a screen basket cover II, which is detachably buckled on the multiple screen baskets II; an ultrasonic component II, which includes multiple ultrasonic emission ends II arranged dispersedly on the sample basket II, and the multiple ultrasonic emission ends II all extend into the water body in the sample basket II; multiple high-definition cameras II, which are respectively arranged above the multiple screen baskets II; A display screen II, which is communicatively connected to the multiple high-definition cameras; a controller II, which is communicatively connected to the ultrasonic component II, the multiple high-definition cameras II and the display screen II. The controller II is used to control the start of the ultrasonic component II to emit ultrasonic waves of different frequencies and different intensities. The controller II is also used to control the start of the multiple high-definition cameras II and the display screen II; And A flushing component, which includes at least two nozzles, which are detachably arranged on the top of the main screening bin, and the front ends of the at least two nozzles extend into the sample basket II; A pump, whose water outlet end is connected to the at least two nozzles through a water pipe, and the water inlet end of the pump is connected to a water inlet pipe.

2. The ultrasonic-based benthic invertebrate screening device according to claim 1, wherein In the pre-screening bin, both sides of a pair of longitudinal screen meshes are two water flow channels, and among them, the width of any one water flow channel is smaller than the vertical distance between the pair of longitudinal screen meshes.

3. The ultrasonic-based benthic invertebrate screening device according to claim 1, characterized in that, The spacing distance between the side wall of the sample basket II and the side wall of an adjacent step-by-step screening basket II is A, the spacing distance between two adjacent step-by-step screening baskets II is B, and A > B.

4. The ultrasonic-based benthic invertebrate screening device according to claim 1, wherein, The bottoms of multiple screening baskets II do not contact each other, and the bottoms of multiple screening baskets II are respectively spaced apart by multiple U-shaped support rods.

5. The ultrasonic-based benthic invertebrate screening device according to claim 1, characterized in that, It further includes: A bottom bin, which is a hollow structure bin. The bottom bin further includes a water inlet, which is arranged at the upper end of the bottom bin; A drain outlet, which is arranged on the side wall near the bottom of the bottom bin; A water outlet, which is opened at the bottom of the main screening bin. The main screening bin is detachably placed on the bottom bin, and the water outlet of the main screening bin is arranged directly opposite the water inlet of the bottom bin; A valve, which is arranged at the water outlet; A drain pipe, one end of which is connected to the drain outlet of the bottom bin, and the other end of the drain pipe extends outward.

6. The ultrasonic-based benthic invertebrate screening device according to claim 5, characterized in that, It further includes: Multiple support legs, which are respectively arranged on the side walls of the pre-screening bin and the main screening bin, and the multiple support legs on the main screening bin do not contact the bottom bin; Multiple lifting rings, which are respectively arranged on the side walls of the pre-screening bin and the main screening bin.

7. The ultrasonic-based benthic invertebrate screening device according to claim 1, characterized in that It further includes: Door I, which is opened on the side wall of the pre-screening bin, and the specification of Door I is larger than that of any longitudinal screen. Any longitudinal screen relatively close to Door I is detachably arranged through a buckle; Door II, which is opened on the side wall of the pre-screening bin, and the specification of Door II is larger than that of the relatively outermost screening basket II. Multiple first side walls of multiple screening baskets II relatively close to Door II are all detachably arranged through buckles and can be opened step by step.

8. A screening method for an ultrasonic-based benthic invertebrate screening device as described in any one of claims 1-7, characterized in that, It includes the following steps: Step 1: Pretreat the collected samples containing benthic invertebrates; Step 2: Place the pretreated samples in the pre-screening bin, and place the pre-screening bin in the water body at the sample collection site, and make the water body flow in from one end of the pre-screening bin and flow out from the other end of the pre-screening bin. Then, control the ultrasonic component I to start through Controller I, and control to adjust the ultrasonic frequency and the vibration power of the ultrasonic wave at least every 5 minutes. Controller I real-time obtains the image information collected by multiple high-definition cameras, and analyzes and compares the images with the benthic invertebrate classification data pre-stored in Controller I to obtain a comparison result. Based on the comparison result, obtain the types and quantities of benthic invertebrates in the samples, screen and record the ultrasonic frequency and vibration power parameters corresponding to different types of benthic invertebrates, as well as the corresponding ultrasonic action time periods; Step 3: Repeat Steps 1 to 2 three times to obtain a dataset of relatively optimal ultrasonic frequency and vibration power parameters, as well as the corresponding ultrasonic action time periods; Step 4: Pre-store the dataset of relatively optimal ultrasonic frequency and vibration power parameters, as well as the corresponding ultrasonic action time periods, into Controller II; Step 5: Repeat Step 1; Step 6: Place the samples collected in Step 5 in the main screening bin, and place the main screening bin in the water body at the sampling point of the samples, and make the water body flow in from one end of the main screening bin and flow out from the other end of the main screening bin. Start the acoustic wave generator through Controller II to emit ultrasonic waves according to the pre-stored dataset; Step 7: Detach the main screening bin after the end of Step 6 from the water body. Then, start the flushing component to flush the sample for at least 5 minutes. After that, place the main screening bin back into the water body at the sampling point of the sample, and let the water flow into one end of the main screening bin and flow out from the other end of the main screening bin; Step 8: Start the acoustic wave generator II through the controller II to emit ultrasonic waves according to the pre-stored data set; Step 9: Detach the main screening bin in Step 8 from the water body, take out or sequentially open multiple sieve baskets II, and sequentially collect the benthic invertebrates in the multiple sieve baskets II; Step 10: Repeat Steps 5 to 9 at least twice.

9. The screening method of the ultrasonic-based benthic invertebrate screening device according to claim 8, characterized in that, In Step 1, the pre-treated sample is to remove the non-biological impurities in the sample.

10. The screening method of the ultrasonic-based benthic invertebrate screening device according to claim 8, characterized in that, The frequency of the ultrasonic wave is 20 kHz–50 kHz, and the vibration power of the ultrasonic wave is 100 w-500 w.

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