Automatic fish size and weight measuring device and use method

Abstract

The invention discloses an automatic fish size and weight measuring device which comprises a measuring table. The electronic weighing scale is embedded in the measuring table, and the top surface of the electronic weighing scale is aligned with the top surface of the measuring table; the fish fixing frame is provided with a graduated scale and is erected on the measuring table across the electronic weighing scale; the conveying mechanism is provided with a conveying belt, the conveying belt extends in the length direction of the measuring table, crosses the electronic weighing scale and penetrates through the fish fixing frame, and the conveying belt and the electronic weighing scale are aligned up and down; the adjustable bracket is mounted on the measuring table; the camera is provided with a positioning visual sensor and is installed on an adjustable support, the adjustable support supports the camera to be suspended above the electronic weighing scale, and the height and the angle of the camera can be adjusted; the control module is electrically connected with the electronic weighing scale, the conveying mechanism, the adjustable support, the camera and the positioning visual sensor.

Description

Technical Field

[0001] The invention relates to fish data property measuring equipment, in particular to a fish size and weight automatic measuring device and a use method. Background Art

[0002] In the field of aquaculture, there is an urgent need to accurately and continuously monitor the morphological characteristics of fish through automated means to assess their health status, optimize daily feeding processes, and provide a scientific basis for selecting the best fishing time.

[0003] The body size parameters of fish (such as total length, body length, trunk length, tail fin length, etc.) are important biological indicators for evaluating their growth status, and play a significant role in the grading, classification and health assessment of fish. In addition, by analyzing the correlation between the morphological parameters of fish and their weight, the weight, fat content and other key physiological characteristics of fish can also be calculated. Therefore, accurate and fast measurements can not only help farms to manage scientifically, but also provide data support for the optimization of fish catching time.

[0004] At present, most aquaculture farms still rely mainly on manual methods to obtain the morphological parameters of fish. The traditional operation method usually requires taking some samples from the water for measurement. The process is time-consuming and labor-intensive, the operation is cumbersome, and it is easy to cause measurement errors due to human factors. However, this method can only obtain data from some samples, and cannot achieve comprehensive monitoring of the entire breeding group, which is difficult to meet the needs of large-scale, modern breeding.

[0005] For example, the Chinese patent application (CN115731282A) discloses a Yangtze River finless porpoise biological measurement device in its specification, including a measuring pipe, the measuring pipe is equipped with a transfer box 1 and a transfer box 2, the inner wall of one side of the transfer box 1 is provided with a slot 1, the top of the inner wall of one side of the transfer box 2 is provided with a slot 2, the bottom sides of both ends of the measuring pipe are provided with a holder, a weighing sensor module is fixedly installed between the top of the holder and the bottom of the measuring pipe, an opening and closing plate is installed at one end of the measuring pipe, and a control component is fixedly installed on the top of one end of the measuring pipe, the control component is used to drive the opening and closing plate to open and close, and the control component is also used to process data. It can be seen that the weight and size data of the Yangtze River finless porpoise are collected in water, but this method has a large measurement error.

[0006] In addition, the Chinese patent application (CN117522951B) discloses a fish monitoring method in its specification, including: obtaining multiple captured images of a school of fish; generating binary images corresponding to the multiple captured images, and determining at least one target image in the multiple captured images based on the binary images, wherein the clarity of the target image is higher than that of other captured images; generating a detection image of a single fish body based on the target image; inputting each detection image into a trained image prediction model, and outputting a predicted image of the reverse side of each detection image; synthesizing the detection image and the predicted image corresponding to the single fish body to generate a 3D image; obtaining the size and weight of the single fish body based on the 3D image; and determining the fish growth information based on the size and weight of each fish body; wherein, obtaining the size and weight of the single fish body based on the 3D image includes: inputting the 3D image into a trained fish body recognition prediction model, and outputting the category of the single fish body corresponding to the 3D image , and the size of a single fish body; determine the weight of a single fish body according to the preset size and weight correlation relationship corresponding to various categories of fish bodies; input the 3D image into the trained fish body recognition prediction model, and output the category of the single fish body corresponding to the 3D image, and the size of the single fish body, including: obtaining multiple 3D sample images, the 3D sample images contain label information, and the label information includes fish body category information and fish body size information; input the 3D sample image into the fish body recognition prediction model, and train the fish body recognition prediction model until the fish body recognition prediction model converges to obtain a trained fish body recognition prediction model; synthesize the detection image and the prediction image corresponding to the single fish body to generate a 3D image, including: converting the detection image and the prediction image corresponding to the single fish body into the same coordinate system, registering the detection image and the prediction image in the same coordinate system, and synthesizing the registered detection image and the prediction image to generate a 3D image. It can be seen that this method has complex calculation steps and is relatively time-consuming. Summary of the invention

[0007] The purpose of the present invention is to provide a device and a method for automatically measuring the size and weight of fishes in view of the defects of the prior art.

[0008] In order to achieve the above-mentioned purpose of the present invention, the following technical scheme is adopted:

[0009] A device for automatically measuring the size and weight of fish comprises a measuring table; an electronic scale, which is embedded in the measuring table and has its top surface aligned with the top surface of the measuring table; a fish fixing frame, which is provided with a scale and is mounted on the measuring table across the electronic scale; a transmission mechanism, which is provided with a conveyor belt, which extends along the length direction of the measuring table and crosses the electronic scale, passes through the fish fixing frame, and is aligned with the electronic scale up and down; an adjustable bracket, which is installed on the measuring table; a camera, which is provided with a positioning visual sensor and is installed on the adjustable bracket, which supports the camera to be suspended above the electronic scale and can adjust the height and angle of the camera; and a control module, which is electrically connected to the electronic scale, the transmission mechanism, the adjustable bracket, the camera, and the positioning visual sensor, respectively.

[0010] As a further improvement of the technical solution, the automatic fish size and weight measuring device of the present invention also includes a communication module, and the control module is communicatively connected with the electronic weight scale, the camera, and the positioning visual sensor through the communication module.

[0011] As a further improvement of the technical solution, the communication module is connected to the electronic weight scale and the external data storage device through the RS232 serial port or the USB interface to facilitate data extraction and subsequent analysis and processing.

[0012] As a further improvement of the technical solution, the camera is equipped with a wide-angle lens.

[0013] As a further improvement of the technical solution, the measuring table is 2 to 2.5 m long, 1 to 1.5 m wide, and has an adjustable height.

[0014] As a further improvement of the technical solution, the speed of the conveyor belt is 0.5-1 m / s.

[0015] A method for using the above-mentioned automatic fish size and weight measuring device, the method comprising the following steps:

[0016] (1) According to the size of the fish, the height of the camera should be set between 1 and 1.5 m; according to the fish measurement requirements, ensure that the conveyor belt transmission speed and measurement time are accurately matched, and adjust the conveyor mechanism through the control module. The conveyor mechanism adjusts the conveyor belt transmission speed range to 0.5-1 m / s to ensure that the fish enters the measurement area smoothly and provide sufficient time for camera shooting and weighing on the scale;

[0017] (2) According to the size of the fish, the fish are placed one by one at the entrance of the conveyor belt, the conveyor belt is started, and the conveying speed is adjusted to ensure the stability of the fish during the measurement process; the conveyor belt conveys the fish to the electronic scale, conveys it to the bottom of the camera and triggers the positioning visual sensor, the control module controls the conveying mechanism to stop working, the conveyor belt stops moving, the fish follows the conveyor belt and is placed on the electronic scale, and the electronic scale automatically weighs; the control module controls the adjustable bracket, the adjustable bracket adjusts the height and angle of the camera so that it looks down vertically at the measurement area, ensuring that the morphological characteristics of the fish are fully captured, while the camera identifies the morphological indicators of the fish and takes images of the fish;

[0018] (3) The electronic scale transmits the weight data obtained by weighing to the control module through the communication module; the camera transmits the fish image obtained by shooting to the control module through the communication module, and the fish image includes a scale. After receiving the fish image, the control module automatically identifies the morphological indicators of the fish through computer vision technology, and the morphological indicators include the total length, body length, trunk length, and tail fin length of the fish;

[0019] (4) The control module receives and records the measurement information of the fish in real time, and the measurement information can be viewed in real time through the display screen.

[0020] As a further improvement of the technical solution, in step (3), when the camera captures the image of the fish on the measuring table, the scale appears in the image as a reference datum.

[0021] As a further improvement to the technical solution, through computer vision algorithms, the device can automatically identify the marks on the scale and determine the actual position and length of the fish relative to the scale.

[0022] As a further improvement of the technical solution, the conveyor belt transports the fish to the exit area after the measurement is completed, making room for the measurement of the next fish. This process is repeated until all fish samples are measured.

[0023] The present invention has the following improvements over the prior art:

[0024] 1. The invention has a simple and practical structural design, low manufacturing cost, convenient operation, fast fish size and weight measurement speed, high work efficiency, and is suitable for automatic measurement of fish in large-scale aquaculture farms. At the same time, the invention can be flexibly adjusted according to different fish species and body shapes, and is suitable for aquaculture farms and scientific research institutions of various types and sizes, and has broad application prospects.

[0025] 2. Compared with the traditional manual fish measurement method, the speed of measuring fish size and weight using the present invention is increased by more than 2 times, which can significantly improve work efficiency and achieve an efficiency improvement of more than 50%. In addition, the present invention ensures the stability of the measurement process through an automated conveyor belt, an accurate electronic weighing scale and a movable camera, reducing errors in manual operation. The accuracy and reliability of the present invention make the fish measurement results more accurate, the data more stable, and effectively reduce the errors caused by external interference, and is suitable for large-scale fish farms and scientific research sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0027] Figure 1 It is a structural schematic diagram of a device for automatically measuring fish size and weight according to the present invention;

[0028] Figure 2 A working flow chart of a device for automatically measuring fish size and weight according to the present invention;

[0029] The serial numbers and corresponding component names in the figure are:

[0030] 1- measuring table, 2- electronic weight scale, 3- conveyor belt, 4- camera, 5- control module, 6- communication module, 7- adjustable bracket. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution in the present application, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary breeding technicians in the field without making creative work should fall within the scope of protection of the present application.

[0032] Embodiment 1:

[0033] like Figure 1-2As shown, the present embodiment is a device for automatically measuring the size and weight of fish, comprising a measuring table 1, an electronic scale 2, a fish fixing frame, a transmission mechanism, an adjustable bracket, a camera, and a control module. The electronic scale 2 is embedded in the measuring table 1, and its top surface is aligned with the top surface of the measuring table 1; a scale is provided on the fish fixing frame, which is mounted on the measuring table across the electronic scale; the transmission mechanism is provided with a conveyor belt, which extends along the length direction of the measuring table and crosses the electronic scale, passes through the fish fixing frame, and the conveyor belt is aligned with the electronic scale up and down; the adjustable bracket is installed on the measuring table; the camera is provided with a positioning visual sensor, which is installed on the adjustable bracket, and the adjustable bracket supports the camera to be suspended above the electronic scale, and the height and angle of the camera can be adjusted; the control module is electrically connected to the electronic scale, the transmission mechanism, the adjustable bracket, the camera, and the positioning visual sensor respectively.

[0034] The electronic weighing scale is integrated into the surface of the measuring table. It measures 50-70cm in length and 30-40cm in width. It has a measurement accuracy of 0.01g and a weighing capacity of up to 5kg.

[0035] The fish fixing frame can ensure that the fish does not move during the measurement process. The scale is used to measure the morphological indicators of fish such as total length, body length, trunk length, tail fin length, etc.

[0036] It is understandable that one structure of the conveying mechanism may be a conveyor. The conveying mechanism drives the conveyor belt to rotate cyclically, so that the fish can be continuously conveyed to the electronic weighing scale.

[0037] The positioning visual sensor is used to position the conveyor belt when it is transferred to the electronic scale. When the conveyor belt transfers the fish to the electronic scale, it triggers the positioning visual sensor to work, and the positioning visual sensor sends data information to the control module. The control module receives the data information and controls the transmission mechanism to stop working, and the transmission mechanism stops driving the conveyor belt to move. The electronic scale measures the weight of the fish, and the measured weight data is transmitted to the control module.

[0038] It should be noted that the control module sets the shooting time of the camera. For example, the shooting time can be set to 5 to 10 seconds. When the positioning visual sensor is working, the control module controls the camera to shoot images at the same time. When the shooting time reaches the set time, the control module controls the camera to stop shooting and the transmission mechanism to work. The camera transmits the captured image to the control module, and the transmission mechanism drives the conveyor belt to move. The conveyor belt takes the fish away from the electronic weighing scale to obtain the weight and size of the fish.

[0039] It is understandable that the fish fixing frame is mounted above the electronic weighing scale, and a scale is provided on the fish fixing frame. When the camera takes an image of the fish, the scale is also taken. The scale can appear in the image as a reference. When the control module receives the image transmitted by the camera, the morphological indicators such as the total length, body length, trunk length, tail fin length, etc. of the fish can be automatically identified through the scale.

[0040] The adjustable bracket is installed on the measuring table to adjust the position of the camera. The height of the camera can be adjusted, and the shooting angle of the camera can be adjusted so that the camera can look down vertically at the measuring area to ensure that the morphological characteristics of the fish are fully captured. The entire process is precisely controlled in speed and position, ensuring that the operator can effectively monitor the measurement process and make necessary adjustments.

[0041] In some optional embodiments, a data information transmission structure is provided, in which a communication module is additionally installed, and the control module is communicatively connected with the electronic weight scale, the camera, and the positioning visual sensor through the communication module.

[0042] Furthermore, the communication module is connected to the electronic weight scale and the external data storage device through the RS232 serial port or the USB interface, so as to facilitate the extraction and subsequent analysis and processing of the data.

[0043] In some optional embodiments, a camera is provided with a wide-angle lens, which can be configured with a resolution of 1080p, and can fully cover the measurement area, thereby accurately capturing the morphological characteristics of the fish.

[0044] In some optional embodiments, the specifications of the measuring table are given. The measuring table is 2 to 2.5 m long, 1 to 1.5 m wide, and adjustable in height. The appropriate specifications of the measuring table can be selected according to the size of the fish.

[0045] In some optional embodiments, the speed of the conveyor belt is given. The speed of the conveyor belt is 0.5-1 m / s. The selectable speed may be 0.5 m / s, 0.6 m / s, 0.7 m / s, 0.8 m / s, 0.9 m / s or 1 m / s. This ensures that the fish can be smoothly conveyed to the measurement area and quickly leave after measurement.

[0046] The width of the conveyor belt is set to 20-30 cm. The available widths are 20, 25 or 30 cm.

[0047] Embodiment 2:

[0048] A method for using a device for automatically measuring fish size and weight, the method comprising the following steps:

[0049] (1) According to the size of the fish, the height of the camera should be set between 1 and 1.5 m. According to the requirements of fish morphology measurement, the conveyor belt transmission speed and measurement time should be accurately matched. The conveyor mechanism is adjusted by the control module. The conveyor mechanism adjusts the conveyor belt transmission speed in the range of 0.5 to 1 m / s to ensure that the fish can enter the measurement area smoothly and provide sufficient time for camera shooting and weighing.

[0050] (2) According to the size of the fish, the fish are placed one by one at the entrance of the conveyor belt, the conveyor belt is started, and the conveying speed is adjusted to ensure the stability of the fish during the measurement process; the conveyor belt conveys the fish to the electronic scale and conveys it to the bottom of the camera and triggers the positioning visual sensor. The control module controls the conveying mechanism to stop working, the conveyor belt stops moving, and the fish is placed on the electronic scale along the conveyor belt, and the electronic scale automatically weighs the fish; the control module controls the adjustable bracket, and the adjustable bracket adjusts the height and angle of the camera so that it can look down vertically at the measurement area to ensure that the morphological characteristics of the fish are fully captured. At the same time, the camera identifies various morphological indicators of the fish and takes pictures of the fish.

[0051] (3) The electronic scale transmits the weight data obtained by weighing to the control module through the communication module; the camera transmits the fish image obtained by shooting to the control module through the communication module, and the fish image includes a scale. After receiving the fish image, the control module automatically identifies the morphological indicators of the fish through computer vision technology. The morphological indicators include the total length, body length, trunk length, and tail fin length of the fish; when the camera shoots the image of the fish on the measuring table, the scale appears in the image as a reference. Through the computer vision algorithm, the device can automatically identify the marks on the scale and determine the actual position and length of the fish relative to the scale.

[0052] (4) The control module receives and records the fish measurement information in real time, and the measurement information can be viewed in real time on the display screen. It can also be exported to an external storage device for further analysis.

[0053] (5) After the measurement is completed, the conveyor belt transports the fish to the exit area to make room for the next fish to be measured. This process repeats until all fish samples have been measured.

[0054] It should be noted that one mode of operation for releasing fish according to the present invention may be: one person operates the device and another person is responsible for placing the fish.

[0055] The present invention places the fish samples one by one at the entrance of the conveyor belt. After starting the device, the fish will be automatically transferred to the measurement area. Then, the morphological characteristics of the fish are captured by a camera, and an electronic scale is used for accurate weighing. The control module will automatically identify the morphological parameters of the fish, such as the total length, body length, trunk length, tail fin length, and complete data processing and storage. After the measurement is completed, the conveyor belt transports the fish to the exit area to make room for the measurement of the next fish. This process is repeated until all fish samples are measured. The operation process is the steps of "fish placement → transmission to the measurement area → camera captures morphological characteristics → accurate weighing with a scale → data processing and analysis → fish transmission away".

[0056] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For ordinary aquaculture technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the protection scope of the invention.

Claims

1. An automatic measuring device for fish size and weight, characterized in that: include Measuring table; An electronic weight scale, wherein the electronic weight scale is embedded in the measuring table, and the top surface of the electronic weight scale is aligned with the top surface of the measuring table; A fish fixing frame, on which a scale is provided, which is mounted on a measuring table across the electronic weight scale; A conveying mechanism, wherein the conveying mechanism is provided with a conveyor belt, the conveyor belt extends along the length direction of the measuring table and crosses the electronic weighing scale, passes through the fish fixing frame, and the conveyor belt is aligned with the electronic weighing scale in the upper and lower directions; An adjustable bracket, the adjustable bracket being mounted on the measuring table; A camera, wherein the camera is provided with a positioning visual sensor and is mounted on the adjustable bracket, wherein the adjustable bracket supports the camera to be suspended above the electronic weight scale and can adjust the height and angle of the camera; as well as A control module is electrically connected to the electronic weight scale, the transmission mechanism, the adjustable bracket, the camera, and the positioning visual sensor.

2. The automatic fish size and weight measuring device according to claim 1, characterized in that: It also includes a communication module, and the control module is communicatively connected with the electronic weight scale, the camera, and the positioning visual sensor through the communication module.

3. The automatic fish size and weight measuring device according to claim 2, characterized in that: The communication module is connected to the electronic weight scale and the external data storage device through the RS232 serial port or the USB interface, so as to facilitate the extraction and subsequent analysis and processing of data.

4. The automatic fish size and weight measuring device according to claim 1, characterized in that: The camera is equipped with a wide-angle lens.

5. The automatic fish size and weight measuring device according to claim 1, characterized in that: The measuring table is 2 to 2.5 m long, 1 to 1.5 m wide, and has an adjustable height.

6. The automatic fish size and weight measuring device according to claim 1, characterized in that: The speed of the conveyor belt is 0.5-1 m / s.

7. A method for using the automatic fish size and weight measuring device according to any one of claims 1 to 6, characterized in that: The method of use comprises the following steps: (1) According to the size of the fish, the height of the camera should be set between 1 and 1.5 m; according to the fish measurement requirements, ensure that the conveyor belt transmission speed and measurement time are accurately matched, and adjust the conveyor mechanism through the control module. The conveyor mechanism adjusts the conveyor belt transmission speed range to 0.5-1 m / s to ensure that the fish enters the measurement area smoothly and provide sufficient time for camera shooting and weighing on the scale; (2) According to the size of the fish, the fish are placed one by one at the entrance of the conveyor belt, the conveyor belt is started, and the conveying speed is adjusted to ensure the stability of the fish during the measurement process; the conveyor belt conveys the fish to the electronic scale, conveys it to the bottom of the camera and triggers the positioning visual sensor, the control module controls the conveying mechanism to stop working, the conveyor belt stops moving, the fish follows the conveyor belt and is placed on the electronic scale, and the electronic scale automatically weighs; the control module controls the adjustable bracket, the adjustable bracket adjusts the height and angle of the camera so that it looks down vertically at the measurement area, ensuring that the morphological characteristics of the fish are fully captured, while the camera identifies the morphological indicators of the fish and takes images of the fish; (3) The electronic scale transmits the weight data obtained by weighing to the control module through the communication module; the camera transmits the fish image obtained by shooting to the control module through the communication module, and the fish image includes a scale. After receiving the fish image, the control module automatically identifies the morphological indicators of the fish through computer vision technology, and the morphological indicators include the total length, body length, trunk length, and tail fin length of the fish; (4) The control module receives and records the measurement information of the fish in real time, and the measurement information can be viewed in real time through the display screen.

8. The method for using the automatic fish size and weight measuring device according to claim 7, characterized in that: In step (3), when the camera captures the image of the fish on the measuring table, the scale appears in the image as a reference.

9. The method for using the automatic fish size and weight measuring device according to claim 8, characterized in that: Using computer vision algorithms, the device can automatically identify the markings on the scale and determine the actual position and length of the fish relative to the scale.

10. The method for using the automatic fish size and weight measuring device according to claim 7, characterized in that: Also includes: After the measurement is completed, the conveyor belt transports the fish to the exit area to make room for the measurement of the next fish; This process is repeated until all fish samples have been measured.

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