Simulation test method for closed henhouse

Abstract

The invention discloses a simulation test method for a closed henhouse, and belongs to the technical field of intelligent breeding. The method comprises the following steps: firstly, constructing a three-dimensional mathematical model of a to-be-inspected chicken house according to a breeding layout planning map of a chicken flock, then setting an initial boundary condition of the to-be-inspected chicken house, and simulating and acquiring an air flow field simulation distribution map of the to-be-inspected chicken house according to the three-dimensional mathematical model and the initial boundary condition; the three-dimensional digital model is divided into a plurality of simulation modules, ventilation boundary conditions of all the simulation modules are obtained according to the air flow field simulation distribution diagram, meanwhile, equal-proportion material object detection models of the simulation modules are constructed, and an air temperature simulation model is obtained through the material object detection models; and finally, optimizing the breeding layout planning map of the chicken house according to the air temperature simulation model and each ventilation boundary condition. According to the method, the equal-scale model of the chicken flocks is introduced in the three-dimensional digital model construction process, and meanwhile, the living chickens are introduced in the simulation experiment, so that the trueness of airflow simulation and physical simulation is improved, and the precision of simulation calculation is improved.

Description

Technical Field

[0001] The present application relates to the field of smart farming technology, and specifically to a simulation inspection method for a closed chicken house. Background Art

[0002] The poultry industry is the second largest livestock industry in my country. my country's large-scale poultry industry has developed rapidly, and the output of eggs and chicken has remained the first and second in the world for many years. However, my country is relatively weak in the environmental control technology related to large-scale poultry farming and the research on the optimal design of chicken houses.

[0003] A closed chicken house, also known as a windowless chicken house or a controlled environment chicken house, is a fully enclosed livestock house that has no windows or only emergency windows. It relies entirely on artificial lighting and mechanical ventilation to regulate the environment inside the house, thereby maintaining a stable internal environment.

[0004] In the prior art, the ventilation system and temperature control system of a closed chicken house are generally simulated by computer simulation technology to optimize the internal planning of the farm. However, in the simulation process, the chickens are generally not included in the influencing factors. However, in the actual breeding process, the chickens are one of the factors that have a greater impact on the temperature changes in the closed chicken house, and the heat generation of the chickens is highly correlated with individual factors and has a strong randomness, which leads to low simulation accuracy. Summary of the invention

[0005] The main purpose of the present application is to provide a simulation inspection method for a closed chicken house, aiming to solve the defect of low simulation accuracy in the prior art.

[0006] This application achieves the above objectives through the following technical solutions: A simulation inspection method for a closed chicken house comprises the following steps: Construct a three-dimensional digital model of the chicken house to be inspected according to the breeding layout planning diagram of the chicken flock, wherein the three-dimensional digital model contains a proportional digital model of the chicken flock; Setting the initial boundary conditions for ventilation detection of the chicken house to be inspected, and obtaining a simulated distribution diagram of the air flow field of the chicken house to be inspected according to the three-dimensional digital model and the initial boundary conditions; Divide the three-dimensional digital model into a plurality of simulation modules, and obtain the ventilation boundary conditions of each simulation module according to the air flow field simulation distribution diagram; Constructing a proportional physical detection model of the simulation module, and obtaining an air temperature simulation model according to the physical detection model; wherein the proportional physical detection model includes a number of live chickens; The breeding layout planning diagram of the chicken house is adjusted and optimized according to the temperature simulation model and the ventilation boundary conditions.

[0007] Optionally, constructing a three-dimensional digital model of the chicken house to be inspected according to the chicken farming layout planning diagram includes the following steps: Obtain the layout plan of the breeding equipment in the chicken house to be inspected; Obtain the building size parameters of the chicken house to be inspected; Obtaining a digital model of each breeding equipment, wherein the digital model is a proportional model of each breeding equipment; According to the type of chickens, individual size parameters of the chickens are obtained and a chicken model is constructed, wherein the individual size parameters are average size parameters of individual chickens in the same age group, wherein the individual size parameters are average size parameters of individual chickens in the same age group; A three-dimensional model of the chicken house to be inspected is constructed according to the building size parameters, and each digital model and chicken model is implanted into the three-dimensional model according to the breeding layout planning diagram to obtain a three-dimensional digital model of the chicken house to be inspected.

[0008] Optionally, setting the initial boundary conditions for ventilation detection of the chicken house to be inspected, and simulating and obtaining a simulated distribution diagram of the air flow field of the chicken house to be inspected according to the three-dimensional digital model and the initial boundary conditions, comprises the following steps: The initial boundary conditions of the chicken house to be inspected are set according to the technical parameters of each ventilation device; wherein the initial boundary conditions include the wind speed and direction of each air inlet and the air pressure of the air outlet; Acquire the three-dimensional digital model; The three-dimensional digital model and the initial boundary conditions are input into the simulation software, and the flow pattern simulation is performed based on the CFD method to generate a simulated distribution diagram of the air flow field of the chicken house to be inspected.

[0009] Optionally, dividing the three-dimensional digital model into a plurality of simulation modules comprises the following steps: Obtaining the three-dimensional digital model and air flow field simulation distribution diagram; Acquire an airflow distribution boundary line according to the air flow field simulation distribution diagram; The three-dimensional digital model is divided into a plurality of simulation modules according to the airflow distribution boundary line.

[0010] Optionally, obtaining ventilation boundary conditions of each simulation module according to the air flow field simulation distribution map includes the following steps: Obtain a simulated distribution diagram of the air flow field; Select any simulation module, and segment the local air flow field simulation distribution map corresponding to the simulation module in the air flow field simulation distribution map according to the position of the simulation module; Selecting a main airflow direction as an intake airflow direction according to the local air flow field simulation distribution diagram; Extracting the airflow velocity and airflow temperature in the direction of the intake airflow according to the local air flow field simulation distribution diagram, and using the airflow velocity and airflow temperature as ventilation boundary conditions; Repeat the step of selecting any simulation module, and dividing the local air flow field simulation distribution map corresponding to the simulation module in the air flow field simulation distribution map according to the position of the simulation module, and obtaining the ventilation boundary conditions of all simulation modules, wherein the ventilation boundary conditions include airflow temperature, airflow velocity and airflow direction.

[0011] Optionally, constructing a proportional physical detection model of the simulation module and obtaining a temperature simulation model according to the physical detection model comprises the following steps: Get the simulation module; A physical model is made according to the simulation module, and the same number of live chickens are placed on the physical model to obtain a proportional physical detection model; Select a normally operating breeding farm and place the proportional physical detection model in the breeding farm; Performing a simulation experiment on the proportional physical detection model according to the test conditions to obtain the ambient temperature of the proportional physical detection model under different test conditions, wherein the test conditions include a combination of multiple groups of different wind speeds and different airflow temperatures; An air temperature simulation model is generated according to the test conditions and the ambient temperature.

[0012] Optionally, a simulation experiment is performed on the proportional physical detection model according to the test conditions to obtain the ambient temperature of the proportional physical detection model under different test conditions, including the following steps: Determine a test condition parameter set according to the ventilation boundary condition, wherein the expression of the test condition parameter set is {(T1, V1), (T2, V2), ..., (T n 、V n )}, where n represents the number of test conditions; Set the sampling frequency and duration of ambient temperature; Get the test conditions (T i 、V i ), input the test conditions (T i 、V i ), where i represents the number of the test condition; Get some ambient temperature detection parameters T i-1 '、T i-2 ', ..., T i-m ', calculate the ambient temperature according to each of the ambient temperature detection parameters, the expression of the ambient temperature is: , where m represents the number of ambient temperature detection parameters; Repeated acquisition of test conditions (T i 、V i ), input the test conditions (T i 、V i ) steps to obtain all ambient temperatures T1', T2', ..., T n '.

[0013] Optionally, generating a temperature simulation model according to the test conditions and the ambient temperature fitting includes the following steps: Get the test condition parameter set {(T1, V1), (T2, V2), ..., (T n 、V n )} and ambient temperature T1', T2', ..., T n '; According to the corresponding relationship, the test condition parameter set {(T1, V1), (T2, V2), ..., (T n 、V n )} and the ambient temperature to obtain the fitting data set {(T1, V1, T1'), (T2, V2, T2'), ..., (T n 、V n , T n ')}; Constructing a standard coordinate system, and taking fitting points in the standard coordinate system according to the fitting data set; Combined with the fitting points, a temperature simulation model is generated by computer fitting.

[0014] Optionally, adjusting and optimizing the breeding layout planning diagram of the chicken house according to the temperature simulation model and each of the ventilation boundary conditions comprises the following steps: Obtain the air temperature simulation model and ventilation boundary conditions of each simulation module; Substituting each of the ventilation boundary conditions into the air temperature simulation model to calculate the simulation temperature of each of the simulation modules; The breeding layout plan of the chicken house is adjusted and optimized according to the simulated temperatures.

[0015] Optionally, adjusting and optimizing the breeding layout plan of the chicken house according to each of the simulated temperatures includes the following steps: Obtaining an optimal feeding temperature range for the chickens, and constructing an upper determination reference plane and a lower determination reference plane according to the optimal feeding temperature range; Constructing a temperature distribution surface diagram according to each of the simulation temperatures; The upper determination reference plane, the lower determination reference plane and the temperature distribution surface map are implanted into the same coordinate system to identify the temperature abnormality area; wherein the temperature abnormality area is represented by the area located above the upper determination reference plane and below the lower determination reference plane in the temperature distribution surface map; The breeding layout plan, initial boundary conditions and breeding density are adjusted, and the steps of constructing a three-dimensional digital model of the chicken house to be inspected according to the breeding layout plan of the chicken flock, wherein the three-dimensional model includes a proportional digital model of the chicken flock, are repeated until all temperature abnormality areas are eliminated.

[0016] Compared with the prior art, this application has the following beneficial effects: The present application first constructs a three-dimensional digital model of the chicken house to be inspected according to the breeding layout planning map of the chicken flock, and sets the initial boundary conditions of the three-dimensional digital model ventilation simulation, and obtains the air flow field simulation distribution map of the chicken house to be inspected according to the three-dimensional digital model and the initial boundary conditions; divides the three-dimensional digital model into several simulation modules, and obtains the ventilation boundary conditions of each of the simulation modules according to the air flow field simulation distribution map, and constructs a proportional physical detection model of the simulation module at the same time, and obtains the temperature simulation model according to the physical detection model; finally, the breeding layout planning map of the chicken house is adjusted and optimized according to the temperature simulation model and the ventilation boundary conditions.

[0017] Compared with the prior art, the present application introduces a proportional model of the chicken flock in the process of constructing the three-dimensional digital model of the chicken house to be inspected according to the types of chickens raised, so that the three-dimensional digital model is closer to the actual breeding status; it is beneficial to improve the accuracy of airflow simulation.

[0018] Secondly, during the detection process, the present application obtained a temperature simulation model through actual simulation experiments conducted using a proportional physical detection model. Live chickens were introduced into the above simulation experiment, thereby reducing the influence of the uncontrollable variable of individual chicken factors in the calculation process of ambient temperature and improving the accuracy of the simulation calculation as much as possible.

[0019] Finally, by changing the initial boundary conditions, the present application can generate a variety of different airflow models, and then obtain the temperature distribution under different airflow conditions. By comparing multiple temperature distributions, the staff can formulate ventilation adjustment technical solutions more scientifically. At the same time, since chickens of different ages require different breeding temperatures, the above temperature distribution surface can be used to breed chickens of different ages in the same chicken house, thereby achieving scientific breeding and improving the utilization rate of the chicken house.

[0020] Through the research on the simulation inspection method of closed chicken houses in this application, it is beneficial to further improve the environmental control technology of large-scale chicken production, optimize the design of chicken houses, improve the equipment level of large-scale chicken farming in my country, and improve the production level and economic benefits of large-scale chicken farming. It has played a huge role in promoting the scientific and technological progress of my country's chicken industry and promoted the transformation and upgrading of the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A flowchart of a simulation inspection method for a closed chicken house provided in Example 1 of the present application; Figure 2 A simplified perspective view of the three-dimensional digital model of the chicken house to be inspected; Figure 3 for Figure 2 The schematic diagram of the air flow field simulation distribution diagram of the three-dimensional digital model shown; Figure 4 A schematic diagram of an air flow field simulation distribution diagram of another feasible closed chicken house layout; Figure 5 is a schematic diagram of the chicken model; Figure 6 is the temperature distribution surface diagram; The purpose, features and advantages of this application will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "robot coordinate system and / or m" as an example, it includes the robot coordinate system scheme, or the m scheme, or the scheme that the robot coordinate system and m satisfy at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. Example 1

[0026] Reference Figure 1 As an optional embodiment of the present application, this embodiment discloses a simulation inspection method for a closed chicken house, comprising the following steps: S1. Construct a three-dimensional digital model of the chicken house to be inspected according to the breeding layout planning diagram of the chicken flock, wherein the three-dimensional digital model contains a proportional digital model of the chicken flock; S11. Obtaining a layout plan of the breeding equipment in the chicken house to be inspected; Obtain a layout plan of the breeding equipment in the chicken house to be inspected, which includes the specifications and layout locations of the chicken cages, the installation locations of various auxiliary equipment, etc. S12, obtaining the building size parameters of the chicken house to be inspected; The various building size parameters of the chicken house to be inspected are obtained by obtaining the architectural drawings of the chicken house to be inspected or by actual measurement. It should be pointed out that the building size parameters include not only the most basic size parameters, but also the positions and size parameters of various vents and windows. The above data can be used to construct a proportional model of the chicken house to be inspected.

[0027] S13, obtaining a digital model of each breeding equipment, wherein the digital model is a proportional model of each breeding equipment; S14. According to the type of the chickens, obtain individual size parameters of the chickens and construct a chicken model, wherein the individual size parameters are average size parameters of individual chickens in the same age group; First, determine the species and age of the chickens in the chicken house, and then retrieve the corresponding body parameters, such as height, from public data based on the species and age; In addition, several chickens in the same age group can be randomly selected, and the corresponding parameters can be measured and their average size parameters can be calculated, and the above average size parameters can be used as individual size parameters; After obtaining the individual size parameters, a chicken model is made according to the above parameters, such as Figure 5 As shown; S15. Construct a three-dimensional model of the chicken house to be inspected according to the building size parameters, and implant each digital model and chicken model into the three-dimensional model according to the breeding layout planning diagram to obtain a three-dimensional digital model of the chicken house to be inspected.

[0028] Obtaining various parameters in steps S12, 13 and 14; According to the building size parameters, a 1:1 scale model of the chicken house to be inspected is established in the BIM software, and various equipment and chicken models are constructed at the same time; Then, according to the layout plan, various equipment are imported into the proportional model of the chicken house to be inspected, so as to obtain the three-dimensional digital model of the chicken house to be inspected, such as Figure 2 shown.

[0029] It should be pointed out that the setting of the chickens needs to be determined according to the breeding density; at the same time, the chicken house described in this application is a large-scale breeding using chicken cages, and the chickens have a limited range of activities, so the impact of chicken movement on the simulation results can be ignored.

[0030] In the process of constructing the above-mentioned three-dimensional digital model, the present application introduces a proportional model of chickens, so that the three-dimensional digital model is closer to the actual breeding status. It can effectively simulate the blocking and diversion effects of chickens on airflow, thereby improving the accuracy of airflow simulation, especially the simulation accuracy of the airflow around the chicken cage and after the airflow passes through the chicken cage.

[0031] S2. Setting the initial boundary conditions for ventilation detection of the chicken house to be inspected, and obtaining a simulated distribution diagram of the air flow field of the chicken house to be inspected according to the three-dimensional digital model and the initial boundary conditions; S21. Setting the initial boundary conditions of the chicken house to be inspected according to the technical parameters of each ventilation device; wherein the initial boundary conditions include the wind speed and direction of each air inlet and the air pressure of the air outlet.

[0032] When designing a closed chicken house, a ventilation system will be designed accordingly. By retrieving the above information, the technical parameters of the entire ventilation device can be accurately obtained, such as ventilation volume, air inlet wind speed, air inlet wind direction and air outlet pressure, etc. The initial boundary conditions are set according to the above technical parameters, wherein the initial boundary conditions include the wind speed and direction of each air inlet and the air pressure of the air outlet.

[0033] S22, obtaining the three-dimensional digital model; S23, inputting the three-dimensional digital model and the initial boundary conditions into the simulation software, performing flow morphology simulation based on the CFD method, and generating a simulated distribution diagram of the air flow field of the chicken house to be inspected; The three-dimensional digital model and the initial boundary conditions are input into simulation software, such as Airpark software, to perform flow pattern simulation based on the CFD method, and generate a simulated distribution diagram of the air flow field of the chicken house to be inspected, such as Figure 3 As shown; At the same time Figure 4 As shown, the present application also discloses an air flow field simulation distribution diagram generated based on a three-dimensional digital model of another chicken house structure; S3, dividing the three-dimensional digital model into a plurality of simulation modules, and obtaining ventilation boundary conditions of each simulation module according to the air flow field simulation distribution map; S31, obtaining the three-dimensional digital model and the air flow field simulation distribution map; Retrieving the three-dimensional digital model and the air flow field simulation distribution diagram obtained in step S23; S32, obtaining an airflow distribution boundary line according to the air flow field simulation distribution diagram; Selecting a common reference point, integrating the three-dimensional digital model with the air flow field simulation distribution map, and then identifying the air flow distribution boundary line in the air flow field simulation distribution map; It should be pointed out that due to the large area of ​​the chicken house, several vents are generally set in the ventilation system of the chicken house, and each vent is equipped with a fan. In the actual ventilation process, the influence area of ​​each vent is limited, and the transition area between the influence areas of two adjacent vents is the boundary line of the airflow distribution. S33, dividing the three-dimensional digital model into a plurality of simulation modules according to the airflow distribution boundary line.

[0034] It should be noted that the division of each simulation module should be as consistent as possible, that is, the area where the chicken cages are placed should be divided at equal distances to ensure that the factors contained therein, such as the size of the chicken cages and the number of chickens, are the same. For some simulation modules that cannot maintain consistency, the gap should be narrowed as much as possible, and the number of simulation modules should be increased to facilitate the subsequent simulation experiments; By identifying the airflow distribution boundary line, the airflow environment of the chicken house can be divided into several relatively independent areas. Due to the high consistency of factors such as environment and ventilation conditions, the internal airflow circulation is also highly similar. The above technical measures can simplify the calculation model, thereby reducing the difficulty of simulation and reducing the hardware requirements for computers and other equipment. At the same time, using the airflow distribution boundary line as a natural dividing mark can ensure that a simulation module is mainly affected by one ventilation device, avoid multiple ventilation devices affecting a simulation module at the same time, reduce the complexity of the airflow in the simulation module, help improve the accuracy of the simulation, and reduce the requirements for hardware equipment such as computers; S34, obtaining a simulated distribution diagram of the air flow field; S35, selecting any simulation module, and segmenting the local air flow field simulation distribution map corresponding to the simulation module in the air flow field simulation distribution map according to the position of the simulation module; S36, selecting a main airflow direction as an intake airflow direction according to the local air flow field simulation distribution diagram; Taking the main airflow direction of the vent as the air intake direction and adjusting the airflow direction can further simplify the airflow model, thereby simplifying the subsequent physical simulation experiments.

[0035] S37, extracting the airflow velocity and airflow temperature in the direction of the intake airflow according to the local air flow field simulation distribution diagram, and using the airflow velocity and airflow temperature as ventilation boundary conditions; S38, repeatedly selecting any simulation module, dividing the local air flow field simulation distribution map corresponding to the simulation module in the air flow field simulation distribution map according to the position of the simulation module, and obtaining the ventilation boundary conditions of all simulation modules.

[0036] Through the above steps, the inlet ventilation boundary conditions of all simulation modules can be obtained, thus providing basic parameters for subsequent steps.

[0037] S4, constructing a proportional physical detection model of the simulation module, and obtaining a temperature simulation model according to the physical detection model; wherein the proportional physical detection model includes a number of live chickens; S41, obtaining a simulation module; It should be noted that if there are multiple simulation modules, each type of simulation module needs to be obtained; S42, making a physical model according to the simulation module, placing the same number of live chickens on the physical model, and obtaining a proportional physical detection model; The simulation module includes chicken cages, chickens, etc. Physical objects of the same size are prepared according to the size parameters of the corresponding model in the simulation module. At the same time, the same number of live chickens are placed in the chicken cages in the same number of layers to obtain a proportional physical detection model.

[0038] S43, selecting a normally operating breeding farm, and placing the proportional physical detection model in the breeding farm; It should be pointed out that a normally operating farm refers to a chicken house that is in normal operation with the same or similar ventilation parameters and the same or similar stocking density. The above-mentioned similarity means that the deviation of the same parameters is within 5%. The above-mentioned deviation value can also be set as needed to control the variables in the experimental process and improve the test accuracy. Place the full-scale physical testing model in the farm; S44, performing a simulation experiment on the proportional physical detection model according to the test conditions to obtain the ambient temperature of the proportional physical detection model under different test conditions, wherein the test conditions include a combination of multiple groups of different wind speeds and different airflow temperatures; S441, determining a test condition parameter set according to the ventilation boundary condition, wherein the expression of the test condition parameter set is {(T1, V1), (T2, V2), ..., (T n 、V n )}, where n represents the number of test conditions; Retrieve all ventilation boundary conditions obtained in step S3. If there are multiple simulation modules, the ventilation boundary conditions of the same type of simulation modules need to be grouped together according to the type of the simulation modules, so as to ensure the accuracy of the test; According to the grouped ventilation boundary conditions, test conditions are formulated for the corresponding simulation modules respectively, so as to obtain a test condition parameter set, and the expression of the test condition parameter set is {(T1, V1), (T2, V2), ..., (T n 、V n )}; If there are multiple simulation modules, there are the same number of test condition parameter sets; It should be pointed out that the test condition parameter set needs to cover all parameters in the ventilation boundary conditions, which can improve the data coverage and calculation accuracy while improving the detection accuracy.

[0039] S442, setting the sampling frequency and sampling duration of the ambient temperature; The number of temperature parameters acquired and the sampling time detection can be controlled by controlling the sampling frequency and the sampling time.

[0040] S443, obtain test conditions (T i 、V i ), input the test conditions (T i 、V i ), where i represents the number of the test condition; From the test condition parameter set {(T1, V1), (T2, V2), ..., (T n 、V n )} to select any test condition (Ti 、V i ), where i represents the number of the test condition; According to the test conditions, the input that meets the test conditions (T i 、V i ) of airflow; S444, obtaining several ambient temperature detection parameters T i-1 '、T i-2 ', ..., T i-m ', calculate the ambient temperature according to each of the ambient temperature detection parameters, the expression of the ambient temperature is: , where m represents the number of ambient temperature detection parameters; During the sampling time, the temperature detection module can obtain several ambient temperature detection parameters T i-1 '、T i-2 ', ..., T i-m ', the average value of the above parameters is taken as the ambient temperature during the sampling period, and the expression of the ambient temperature is: , where m represents the number of ambient temperature detection parameters; It should be pointed out that when testing the ambient temperature parameter T i-1 '、T i-2 ', ..., T i-m The processing of ' also includes a data screening step, which is as follows: First, set the data screening value A, such as setting the data screening value A=5%; Then, according to the ambient temperature detection parameter T i-1 '、T i-2 ', ..., T i-m 'Draw the ambient temperature distribution curve; Select a section of the curve with the smallest temperature fluctuation from the ambient temperature distribution curve, calculate the average value of the ambient temperature involved in the section of the curve, and use the average value as the reference value B; Eliminate the data that do not meet the judgment formula, and calculate the average value of the remaining data as the ambient temperature. The judgment formula is (1-A)B≤C≤(1+A)B; Through the above processing, some measurement values ​​at the beginning of the experiment when the ambient temperature changes dramatically can be excluded, which is beneficial to improve the accuracy of the data and thus improve the accuracy of the simulation.

[0041] S445, repeatedly obtain test conditions (T i 、V i ), input the test conditions (T i 、V i) steps to obtain all ambient temperatures T1', T2', ..., T n '.

[0042] S45, generating a temperature simulation model according to the test condition parameter set and the ambient temperature fitting.

[0043] S451, obtain a test condition parameter set {(T1, V1), (T2, V2), ..., (T n 、V n )} and ambient temperature T1', T2', ..., T n '; S452: According to the corresponding relationship, the test condition parameter set {(T1, V1), (T2, V2), ..., (T n 、V n )} and the ambient temperature to obtain the fitting data set {(T1, V1, T1'), (T2, V2, T2'), ..., (T n 、V n , T n ')}; S453, constructing a standard coordinate system, and obtaining fitting points in the standard coordinate system according to the fitting data set; A three-dimensional coordinate system is constructed as a standard coordinate system, where the X-axis of the standard coordinate system represents the air flow temperature T1, T2, ..., T n ; The Y axis represents the air flow rate V1, V2, ..., V n ; The Z axis represents the ambient temperature T1', T2', ..., T n '; Combine the fitting data set {(T1, V1, T1'), (T2, V2, T2'), ..., (T n 、V n , T n ')} Take the fitting points in the standard coordinate system.

[0044] S454, combining the fitting points, generating a temperature simulation model through computer fitting.

[0045] After all the fitting points are marked, the corresponding three-dimensional surface graph is generated by computer fitting simulation, and the three-dimensional surface graph is the temperature simulation model; It should be pointed out that if there are multiple simulation modules of different types, the same number of temperature simulation models can be obtained by repeating the above steps; S5. Adjust and optimize the breeding layout plan of the chicken house according to the temperature simulation model and the ventilation boundary conditions.

[0046] S51, obtaining the temperature simulation model and ventilation boundary conditions of each simulation module; When obtaining the temperature simulation model and ventilation boundary adjustment, it is necessary to ensure that they correspond to the same type of simulation module to ensure matching between the data.

[0047] S52, respectively substituting each of the ventilation boundary conditions into the temperature simulation model to calculate the simulation temperature of each of the simulation modules; S53, adjusting and optimizing the breeding layout plan of the chicken house according to each of the simulated temperatures; S531, obtaining an optimal feeding temperature range for the chickens, and constructing an upper determination reference plane and a lower determination reference plane according to the optimal feeding temperature range; Check the best temperature range for chickens based on their breed and age; Construct a three-dimensional coordinate system, in which the X-axis represents the length coordinate of the chicken house, the Y-axis represents the width coordinate of the chicken house, and the Z-axis represents the temperature; According to the optimal feeding temperature range, an upper determination reference plane and a lower determination reference plane based on the chicken house plan can be constructed in a three-dimensional coordinate system; S532, constructing a temperature distribution surface diagram according to each of the simulation temperatures; At the same time, the plane coordinates of the point where the simulation module is located and the simulation temperature calculated in step S52 are combined to select a point in the three-dimensional coordinates described in step S531, and then a temperature distribution surface diagram is constructed by computer simulation fitting, such as Figure 6 As shown; S533, implanting the upper determination reference plane, the lower determination reference plane and the temperature distribution surface map into the same coordinate system to identify the temperature abnormality area; wherein the temperature abnormality area is represented by the area located above the upper determination reference plane and below the lower determination reference plane in the temperature distribution surface map; After the temperature distribution surface graph is constructed, it can be clearly determined which areas are above the upper determination reference plane, which areas are below the lower determination reference plane, and which areas are between the upper determination reference plane and the lower determination reference plane. The areas above the upper determination reference plane and below the lower determination reference plane are determined as temperature abnormality areas. S534, adjusting the breeding layout planning map, initial boundary conditions and breeding density, and repeating the step of constructing a three-dimensional digital model of the chicken house to be inspected according to the breeding layout planning map of the chicken flock, wherein the three-dimensional model includes a proportional digital model of the chicken flock, until all temperature abnormality areas are eliminated; By adjusting the initial boundary conditions and repeating the above steps, several different temperature distribution surface graphs can be obtained. If there is no abnormal temperature area in each of the temperature surface distribution graphs, it can be determined that the breeding layout planning diagram is qualified; If abnormal temperature areas appear in some of the temperature surface distribution maps, the breeding layout plan is judged to be unqualified and needs to be adjusted. The adjustment methods include but are not limited to adjusting the position of the chicken cages in the chicken house, re-establishing the initial boundary conditions according to the performance parameters of the ventilation equipment, adjusting the breeding density of chickens, etc.; After adjustment, repeat the inspection house described in this application until all temperature abnormal areas are eliminated; It should be pointed out that a certain floating ratio can be set in the optimal breeding temperature range to expand the distance above the upper judgment reference plane and between the lower judgment reference plane, and then include some temperature abnormality areas with smaller deviations into the normal temperature range, thereby improving inspection efficiency and avoiding detection errors caused by equipment reasons.

[0048] Compared with the prior art, the present application introduces a proportional model of the chicken flock in the process of constructing the three-dimensional digital model of the chicken house to be inspected according to the type of chickens raised, so that the three-dimensional digital model is closer to the actual breeding state; it is beneficial to improve the accuracy of airflow simulation; Secondly, during the detection process, the present application obtained a temperature simulation model through actual simulation experiments conducted using a proportional physical detection model. Live chickens were introduced into the above simulation experiment, thereby reducing the influence of the uncontrollable variable of individual chicken factors in the calculation process of ambient temperature and improving the accuracy of the simulation calculation as much as possible.

[0049] Finally, by changing the initial boundary conditions, the present application can generate a variety of different airflow models, and then obtain the temperature distribution under different airflow conditions. By comparing multiple temperature distribution surfaces, the staff can formulate ventilation adjustment technical solutions more scientifically. At the same time, since chickens of different ages require different breeding temperatures, the above temperature distribution surface can be used to breed chickens of different ages in the same chicken house, thereby achieving scientific breeding and improving the utilization rate of the chicken house.

[0050] The research on the simulation inspection method of closed chicken houses in this application will help further improve the environmental control technology of large-scale chicken production, optimize the design of chicken houses, improve the equipment level of large-scale chicken farming in my country, and improve the production level and economic benefits of large-scale chicken farming.

[0051] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A simulation inspection method for a closed chicken house, characterized in that: The following steps are involved: Construct a three-dimensional digital model of the chicken house to be inspected according to the breeding layout planning diagram of the chicken flock, wherein the three-dimensional digital model contains a proportional digital model of the chicken flock; Setting the initial boundary conditions for ventilation detection of the chicken house to be inspected, and obtaining a simulated distribution diagram of the air flow field of the chicken house to be inspected according to the three-dimensional digital model and the initial boundary conditions; Divide the three-dimensional digital model into a plurality of simulation modules, and obtain the ventilation boundary conditions of each simulation module according to the air flow field simulation distribution diagram; Constructing a proportional physical detection model of the simulation module, and obtaining an air temperature simulation model according to the physical detection model; The breeding layout planning diagram of the chicken house is adjusted and optimized according to the temperature simulation model and the ventilation boundary conditions.

2. A simulation inspection method for a closed chicken house according to claim 1, characterized in that: The method of constructing a three-dimensional digital model of the chicken house to be inspected according to the chicken farming layout planning diagram includes the following steps: Obtain the layout plan of the breeding equipment in the chicken house to be inspected; Obtain the building size parameters of the chicken house to be inspected; Obtaining a digital model of each breeding equipment, wherein the digital model is a proportional model of each breeding equipment; According to the type of chickens, the individual size parameters of the chickens are obtained and a chicken model is constructed, wherein the individual size parameters are the average size parameters of the chickens in the same age group; A three-dimensional model of the chicken house to be inspected is constructed according to the building size parameters, and each digital model and chicken model is implanted into the three-dimensional model according to the breeding layout planning diagram to obtain a three-dimensional digital model of the chicken house to be inspected.

3. A simulation inspection method for a closed chicken house according to claim 1, characterized in that: The initial boundary conditions for ventilation detection of the chicken house to be inspected are set, and a simulated distribution diagram of the air flow field of the chicken house to be inspected is obtained according to the three-dimensional digital model and the initial boundary conditions, including the following steps: The initial boundary conditions of the chicken house to be inspected are set according to the technical parameters of each ventilation device; wherein the initial boundary conditions include the wind speed and direction of each air inlet and the air pressure of the air outlet; Acquire the three-dimensional digital model; The three-dimensional digital model and the initial boundary conditions are input into the simulation software, and the flow pattern simulation is performed based on the CFD method to generate a simulated distribution diagram of the air flow field of the chicken house to be inspected.

4. A simulation inspection method for a closed chicken house according to claim 3, characterized in that: The step of dividing the three-dimensional digital model into a plurality of simulation modules comprises the following steps: Obtaining the three-dimensional digital model and air flow field simulation distribution diagram; Acquire an airflow distribution boundary line according to the air flow field simulation distribution diagram; The three-dimensional digital model is divided into a plurality of simulation modules according to the airflow distribution boundary line.

5. A simulation inspection method for a closed chicken house according to claim 4, characterized in that: The step of obtaining the ventilation boundary conditions of each simulation module according to the air flow field simulation distribution diagram comprises the following steps: Obtain a simulated distribution diagram of the air flow field; Select any simulation module, and segment the local air flow field simulation distribution map corresponding to the simulation module in the air flow field simulation distribution map according to the position of the simulation module; Selecting a main airflow direction as an intake airflow direction according to the local air flow field simulation distribution diagram; Extracting the airflow velocity and airflow temperature in the direction of the intake airflow according to the local air flow field simulation distribution diagram, and using the airflow velocity and airflow temperature as ventilation boundary conditions; Repeat the step of selecting any simulation module, and dividing the local air flow field simulation distribution map corresponding to the simulation module in the air flow field simulation distribution map according to the position of the simulation module, and obtaining the ventilation boundary conditions of all simulation modules, wherein the ventilation boundary conditions include airflow temperature, airflow velocity and airflow direction.

6. A simulation inspection method for a closed chicken house according to claim 5, characterized in that: The step of constructing a proportional physical detection model of the simulation module and obtaining a temperature simulation model according to the physical detection model comprises the following steps: Get the simulation module; A physical model is made according to the simulation module, and the same number of live chickens are placed on the physical model to obtain a proportional physical detection model; Select a normally operating breeding farm and place the proportional physical detection model in the breeding farm; Performing a simulation experiment on the proportional physical detection model according to the test conditions to obtain the ambient temperature of the proportional physical detection model under different test conditions, wherein the test conditions include a combination of multiple groups of different wind speeds and different airflow temperatures; An air temperature simulation model is generated according to the test conditions and the ambient temperature.

7. A simulation inspection method for a closed chicken house according to claim 6, characterized in that: The simulation experiment is performed on the proportional physical detection model according to the test conditions to obtain the ambient temperature of the proportional physical detection model under different test conditions, including the following steps: Determine a test condition parameter set according to the ventilation boundary condition, wherein the expression of the test condition parameter set is {(T1, V1), (T2, V2), ..., (T n 、V n )}, where n represents the number of test conditions; Set the sampling frequency and duration of ambient temperature; Get the test conditions (T i 、V i ), input the test conditions (T i 、V i ), where i represents the number of the test condition; Get some ambient temperature detection parameters T i-1 '、T i-2 ', ..., T i-m ', calculate the ambient temperature according to each of the ambient temperature detection parameters, the expression of the ambient temperature is: , where m represents the number of ambient temperature detection parameters; repeatedly obtain the test conditions (T i 、V i ), input the test conditions (T i 、V i ) steps to obtain all ambient temperatures T1', T2', ..., T n '.

8. A simulation inspection method for a closed chicken house according to claim 6, characterized in that: The step of generating a temperature simulation model according to the test conditions and the ambient temperature fitting comprises the following steps: Get the test condition parameter set {(T1, V1), (T2, V2), ..., (T n 、V n )} and ambient temperature T1', T2', ..., T n '; According to the corresponding relationship, the test condition parameter set {(T1, V1), (T2, V2), ..., (T n 、V n )} and the ambient temperature to obtain the fitting data set {(T1, V1, T1'), (T2, V2, T2'), ..., (T n 、V n , T n ')}; Constructing a standard coordinate system, and taking fitting points in the standard coordinate system according to the fitting data set; Combined with the fitting points, a temperature simulation model is generated by computer fitting.

9. A simulation inspection method for a closed chicken house according to claim 8, characterized in that: The step of adjusting and optimizing the breeding layout plan of the chicken house according to the temperature simulation model and the ventilation boundary conditions comprises the following steps: Obtain the air temperature simulation model and ventilation boundary conditions of each simulation module; Substituting each of the ventilation boundary conditions into the air temperature simulation model to calculate the simulation temperature of each of the simulation modules; The breeding layout plan of the chicken house is adjusted and optimized according to the simulated temperatures.

10. A simulation inspection method for a closed chicken house according to claim 9, characterized in that: The method of adjusting and optimizing the breeding layout plan of the chicken house according to each of the simulated temperatures includes the following steps: Obtaining an optimal feeding temperature range for the chickens, and constructing an upper determination reference plane and a lower determination reference plane according to the optimal feeding temperature range; Constructing a temperature distribution surface diagram according to each of the simulation temperatures; The upper determination reference plane, the lower determination reference plane and the temperature distribution surface map are implanted into the same coordinate system to identify the temperature abnormality area; wherein the temperature abnormality area is represented by the area located above the upper determination reference plane and below the lower determination reference plane in the temperature distribution surface map; The breeding layout plan, initial boundary conditions and breeding density are adjusted, and the steps of constructing a three-dimensional digital model of the chicken house to be inspected according to the breeding layout plan of the chicken flock, wherein the three-dimensional model includes a proportional digital model of the chicken flock, are repeated until all temperature abnormality areas are eliminated.

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