Real-time monitoring system for performance of small ventilation window of livestock and poultry house

Abstract

The invention provides a livestock and poultry house ventilation small window performance real-time monitoring system which comprises a small window installed on the side wall of a livestock and poultry house, a dust cover is installed on the air inlet side of the small window, a baffle and a flow guide plate are arranged on the air outlet side of the small window, and the baffle is connected with a driving mechanism used for controlling the opening and closing states of the baffle. The space between the baffle and the guide plate is used as an inevitable passage for airflow to enter the livestock and poultry house; a controller is arranged near the small window, the distance measuring sensor is connected with the controller and installed above or below the flow guide plate, the distance measuring sensor is used for obtaining the distance between the measuring datum point and the flow guide plate, and the air speed sensor is connected with the controller and installed in the cavity of the dust cover and used for obtaining the air inlet speed. The method has the advantages of being convenient to operate, good in safety, high in efficiency and high in accuracy, and the ventilation performance such as the actual air inlet amount, the air inlet direction and the actual air speed of the livestock and poultry house ventilation small window can be automatically monitored in real time under the condition that the ventilation effect of the small window is not affected.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation monitoring for livestock and poultry houses, and in particular to a real-time monitoring system for the performance of ventilation windows for livestock and poultry houses. Background Art

[0002] The ventilation performance of small windows in livestock and poultry houses (mainly including ventilation volume, wind speed and wind direction) is directly related to the growth performance of farmed animals in the house. When small window ventilation is the main ventilation mode, the air from the small windows can be evenly mixed with the original air above the livestock and poultry house and sent to the center of the breeding area below. During the breeding process, in order to achieve the expected air supply effect, the opening angle of the small windows is usually frequently adjusted according to the ventilation needs. The overall ventilation performance of the small windows directly determines the environment in the house, but the air from the small windows often has uneven air flow, especially in the longitudinal direction, which can reach a difference of two times or more. At present, the strategy of unified control of small windows is used in livestock and poultry houses, but due to problems such as control accuracy and installation position, different ventilation small windows have different opening angles, which greatly affects the ventilation in livestock and poultry houses. Although some small windows have the same opening, their air intake conditions are also very different due to changes in outdoor wind speed and wind direction. In short, different openings of ventilation small windows will lead to large differences in ventilation performance and different impacts on the environment in the house. Therefore, monitoring the air intake performance of small windows in livestock and poultry houses is of great significance to animal welfare and breeding benefits.

[0003] At present, the performance monitoring of small windows in livestock and poultry houses usually relies on breeders to frequently operate and measure with handheld wind speed sensor equipment. When breeders monitor the small windows, they are working at a height of four or five meters. Many livestock and poultry houses do not have safety protection measures, which is very dangerous. Manual monitoring will result in large errors. This is mainly because the wind speed flow field at the outlet of the small window is very chaotic. The manual handheld anemometer cannot be guaranteed to be perpendicular to the outlet, and the wind speed value measured by high-altitude operations cannot represent the average wind speed of the incoming wind, which will further amplify the measurement error. Therefore, it is necessary to develop a real-time monitoring system for the performance of small ventilation windows in livestock and poultry houses that is easy to operate, safe, efficient, accurate, and can effectively monitor the incoming wind speed. Summary of the invention

[0004] At least in order to solve the technical problems mentioned in the background technology, the present invention aims to provide a real-time monitoring system for the performance of ventilation windows in livestock and poultry houses.

[0005] The present invention adopts the following technical solution.

[0006] A real-time monitoring system for the performance of a ventilation window in a livestock and poultry house comprises a small window installed on a side wall of the livestock and poultry house, a dust cover is installed on the air inlet side of the small window, an air guide plate and a flow guide plate are arranged on the air outlet side of the small window, the air guide plate is connected to a driving mechanism for controlling the opening and closing state of the air guide plate, and the space between the air guide plate and the flow guide plate serves as a necessary passage for airflow to enter the livestock and poultry house; a controller is arranged near the small window, a distance measuring sensor is connected to the controller and installed above or below the flow guide plate, the distance measuring sensor is used to obtain the distance from a measurement reference point to the flow guide plate, a wind speed sensor is connected to the controller and installed in a chamber of the dust cover, and the wind speed sensor is used to obtain the air intake speed.

[0007] As one of the preferred solutions of the present invention, the distance measuring sensor is arranged vertically below the wind deflector; the controller includes a storage module, a processing module, and a program stored in the storage module and executable on the processing module, and the processing module implements the following steps when executing the program: S11, obtaining the distance L (cm) from the reference point to the guide plate fed back by the distance measuring sensor in real time, obtaining the wind speed V0 (m / s) fed back by the wind speed sensor in real time, and then correcting the obtained wind speed V0 to obtain the average wind speed V1 = C*V0 of the wind entering the small window, where C is the correction coefficient; S12, obtaining preset small window parameters, including the height h (cm) of the small window, the thickness a (cm) of the small window, the sum of the distance c (cm) between the small window and the reference point of the distance measuring sensor, and the area A (cm) at the air inlet of the dust cover. 2 ); S13, calculate the opening size b (cm) of the air guide plate according to the following formula (I): The wind direction angle Φ (°) at the small window is calculated according to the following formula (Ⅱ): Φ=arctan L / c…………(Ⅱ) According to the following formula (III), the air volume Q (m 3 / s), Q=V1*A…………(Ⅲ) According to the following formula (Ⅳ), the wind speed V2 (m / s) at the small window wind guide plate is calculated: In the formula, K represents the length of the small window, and V1 represents the average wind speed of the air entering the small window; S14, the opening size b (cm) of the output air guide plate, the wind direction angle Φ (°) at the small window and the air intake volume Q (m 3 / s).

[0008] As a second preferred solution of the present invention, the distance measuring sensor is vertically arranged above the wind deflector; the controller includes a storage module, a processing module, and a program stored in the storage module and executable on the processing module, and the processing module implements the following steps when executing the program: S21, obtaining in real time the distance L (cm) from the reference point to the guide plate fed back by the distance measuring sensor, obtaining in real time the wind speed V0 (m / s) fed back by the wind speed sensor, and then correcting the obtained wind speed V0 to obtain the average wind speed V1 = C*V0 of the wind entering the small window, where C is the correction coefficient; S22, obtaining preset small window parameters, including the height h (cm) of the small window, the length K (cm) of the small window, the area A (cm) of the air inlet of the dust cover 2 ), the angle θ between the guide plate 17 and the upper frame of the small window 12, and the distance e (cm) between the laser emission point of the displacement sensor 2 and the edge of the window frame of the small window 12; S23, calculate the opening size b (cm) of the air guide plate according to the following formula (V), The wind direction angle Φ (°) at the small window is calculated according to the following formula (VI): Φ=arctan(hL) / a…………(VI) The wind speed V2 (m / s) at the small window air guide plate is calculated according to the following formula (VII): In the formula, K represents the length of the small window, and V1 represents the average wind speed of the air entering the small window; S24, output the opening size b (cm) of the air guide plate, the wind direction angle Φ (°) at the small window, and the wind speed V2 (m / s) at the air guide plate.

[0009] Furthermore, the distance measuring sensor is installed on a support plate, and the support plate is fixedly connected to the side wall.

[0010] Furthermore, the guide plate is arranged obliquely upward, and such a solution can effectively prevent the livestock and poultry in the house from suffering from cold stress.

[0011] Furthermore, the controller is fixedly mounted on the side wall.

[0012] To further improve the accuracy of the monitoring results, the wind speed sensor is installed in the middle of the chamber of the dust cover.

[0013] Beneficial effects: The present invention has the advantages of convenient operation, good safety, high efficiency and high accuracy. It can monitor the performance of the ventilation windows of livestock and poultry houses in real time and automatically without affecting the ventilation effect of the windows. The present invention cleverly monitors the air intake volume and outlet wind speed of the windows without affecting the air intake effect of the windows by placing a wind speed sensor in the middle of the chamber of the dust cover. It can be adapted to different types of ventilation windows on the side walls of livestock and poultry houses. Only two sensors and a specific algorithm model are used to monitor the ventilation performance of the windows, such as the air intake volume, air intake speed, opening, and air intake direction, in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of a real-time monitoring system for ventilation windows of livestock and poultry houses in an embodiment; Figure 2 It is a flow chart of the controller of the real-time monitoring system of the ventilation window performance of the livestock and poultry house in the embodiment; Figure 3 Schematic diagram of the controller structure of the real-time monitoring system for ventilation window performance of livestock and poultry houses in the embodiment; Figure 4 , Figure 5 This is a partial schematic diagram of the real-time monitoring system for ventilation window performance of livestock and poultry houses in Example 1; Figure 6 This is a schematic diagram of a calculation model of a real-time monitoring system for ventilation window performance in a livestock and poultry house in Example 1; Figure 7 , Figure 8 It is a partial schematic diagram of the real-time monitoring system for ventilation window performance of livestock and poultry houses in Example 2; Fig. 9 This is a schematic diagram of the calculation model of the real-time monitoring system for the ventilation window performance of livestock and poultry houses in Example 2.

[0015] In the figure: 1-distance sensor, 2-wind speed sensor, 3-single chip control board, 4-power supply, 5-button module, 6-clock module, 7-wireless transmission module, 8-display screen, 9-SD card, 10-housing, 11-livestock house, 12-small window, 13-controller, 15-user end, 16-spring, 17-guide plate, 18-wind guide plate, 19-support, 20-light (light beam), 21-sensor wiring, 22-dust cover, 23-support plate, 24-traction rope, 25-side wall. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is described clearly and completely below. 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.

[0017] First, the controller used in the embodiment is described. Figure 2 and Figure 3 As shown, the controller 13 is connected with the distance sensor 1 (laser distance sensor) and the wind speed sensor 2. The controller 13 includes a single-chip microcomputer controller 3 (control module, which can adopt Arduino board, STM32 or other types of single-chip microcomputers, and the sampling frequency of the clock module 5 preset for the user is 1s, 30s, 1min, etc.), a power supply 4 (which can adopt a 5V-24V rechargeable battery or an external power supply), a button module 5, a clock module 6, a wireless transmission module 7, a display screen 8, an SD card 9 (storage module), a housing 10, and a sensor connection 21. The distance sensor 1 and the wind speed sensor 2 are respectively connected to the single-chip microcomputer controller 3 through the sensor connection 21. The distance sensor 1 is used to collect distance parameters and feed them back to the single-chip microcomputer controller 3, the wind speed sensor 2 is used to collect wind speed parameters and feed them back to the single-chip microcomputer controller 3, the power supply 4 supplies power to the single-chip microcomputer controller 3 and the sensor, and the clock module 6 is used to control the sensor collection frequency and send time data to the control module, and match / attach time tags to the real-time measured parameters. The wireless transmission module 7 is used to receive the transmission command issued by the single-chip control board 3 and send the measured data to the user end 15 through the wireless network. The display screen 8 is used to display the output parameters for debugging and on-site verification and analysis; the SD card 9 is used to store the measured data and back up the data to prevent loss. Example 1

[0018] Combination Figures 1 to 6 As shown, a real-time monitoring system for the performance of a ventilation window in a livestock and poultry house comprises a small window 12 installed on a side wall 25 of a livestock and poultry house 11, a dust cover 22 is installed on the air inlet side of the small window 12, and an air guide plate 18 and a flow guide plate 17 are arranged on the air outlet side of the small window 12, the air guide plate 18 is connected to a driving mechanism for controlling the opening and closing state of the air guide plate 18, the driving mechanism comprises a spring 16 and a traction rope 24 connected to the air guide plate 18, the traction rope 24 is connected to a motor, and when in use, the tension of the traction rope 24 is controlled by controlling the operation of the motor to achieve the deflection of the air guide plate 18 (for example, when the tension of the traction rope 24 becomes larger, the air guide plate 18 deflects downward, At this time, the opening of the small window 12 becomes larger), and after the traction force is removed, the wind guide plate 18 is reset with the help of the spring 16. The wind guide plate 17 is fixedly installed and arranged obliquely upward. The space between the wind guide plate 18 and the wind guide plate 17 serves as the necessary channel for the airflow to enter the livestock and poultry house; a controller 13 is arranged near the small window 12, and a distance sensor 1 is connected to the controller 13 and installed above or below the guide plate 17. The distance sensor 1 is used to obtain the distance from the measurement reference point to the guide plate 17. The wind speed sensor 2 is connected to the controller 13 and installed in the cavity of the dust cover 22. The wind speed sensor 2 is fixed by a support 19 and is used to obtain the incoming air speed. In this embodiment, the distance sensor 1 is mounted on the support plate 23, and the support plate is fixedly connected to the side wall 25; the controller 13 is fixedly mounted on the side wall 25; and the wind speed sensor 2 is mounted in the middle of the chamber of the dust cover 22. In this solution, the laser beam 20 emitted by the distance sensor 1 acts on the wind deflector 18, and the length of the laser beam changes is the vertical distance of the wind deflector 18 rotating. Through the positional relationship between the distance sensor 1 and the wind deflector 18 and the size parameters of the small window, the vertical distance between the upper edge of the wind deflector 18 and the guide plate 17 can be calculated by the single-chip control board 3.

[0019] In this embodiment, the distance measuring sensor 1 is arranged vertically below the wind deflector 18, and the controller 13 includes a storage module, a processing module, and a program stored in the storage module and executable on the processing module. When the processing module executes the program, the following steps are implemented: Figure 6 As shown: S11, obtaining the distance L (cm) from the reference point to the guide plate 17 fed back by the distance measuring sensor 1 in real time, obtaining the wind speed V0 (m / s) fed back by the wind speed sensor 2 in real time, and then correcting the obtained wind speed V0 to obtain the average wind speed V1 of the small window wind; Since the wind speed sensor 2 is connected to the controller 13 and installed in the chamber of the dust cover 22, according to the fluid dynamics analysis, the flow field in the dust cover 22 is compared to the internal flow problem of the square tube flow, and its stable section appears in the middle part, and the length of the dust cover 22 needs to be 10 times or more of its equivalent diameter. It is considered that the measuring point of the wind speed sensor 2 is in the air inlet stable section. However, since the air inlet flow field of the small window 12 is relatively chaotic, it is easy to know from fluid dynamics that the measured wind speed is too large, so the data measured by the wind speed sensor 2 needs to be corrected. In fluid dynamics, if the flow velocity at the midpoint of the pipeline is known, the power law distribution model proposed by von Karman can be used to calculate the average flow velocity of the pipeline. The power law distribution form is as follows Where v(r) is the velocity of the fluid at a distance r from the center axis of the tube; v max is the maximum velocity at the center of the pipe; R is the radius of the pipe; r is the radial distance from the center of the pipe (0≤r≤R); n is an empirical index, usually between 7 and 10 (the common value is 7); after the velocity at each point is obtained through power law distribution, a series of integration and simplification can finally get the correction formula of the average wind speed Right now Where C is the correction factor, and its value can be obtained through field measurement, laboratory measurement or formula derivation; The present invention uses the fluid dynamics pipeline flow correction formula (V1=C*V0) to correct the obtained data, and the average wind speed V1 of the small window air intake can be obtained, where C is the correction coefficient, and the C value is 0.85 in this example; S12, obtain the preset parameters of the small window 12, including the height h (cm) of the small window 12, the thickness a (cm) of the small window 12, the sum of the distance c (cm) between the small window 12 and the reference point of the distance measuring sensor 1, the actual average air velocity V1 (m / s) of the small window, the area A (cm) of the air inlet of the dust cover, 2 ), the angle θ (°) between the guide plate 17 and the upper frame of the small window 12; S13, calculate the opening size b (cm) of the air guide plate 18 according to the following formula (Ⅰ), and the b value at any time is compared with the b value when the small window 12 reaches the maximum opening, which is the opening of the small window 12, wherein the b value is the length of the vertical ray drawn from the intersection of the displacement sensor laser extension line and the small window frame to the small window air guide plate 18. The wind direction angle Φ (°) at the small window (12) is calculated according to the following formula (II), where Φ is the angle between the wind guide plate 18 of the small window 12 and the horizontal plane. Due to the existence of the wind guide plate 18, the air jet entering the small window 12 will be along the direction of the wind guide plate 18. The wind direction angle is the angle Φ between the wind guide plate 18 and the horizontal direction. Φ=arctan L / c…………(Ⅱ) The air volume Q (m2) of the small window (12) is calculated according to the following formula (III): 3 / s), Q=V1*A…………(Ⅲ) According to the following formula (Ⅳ), the wind speed V2 (m / s) at the small window wind guide plate is calculated: In the formula, K represents the length of the small window, and V1 represents the average wind speed of the air entering the small window; S14, output the opening size b of the air guide plate 18, the wind direction angle Φ at the small window 12 and the air intake volume Q. Example 2

[0020] Combination Figures 1 to 3 as well as Figures 7 to 9 As shown, a real-time monitoring system for the performance of ventilation windows in livestock and poultry houses, with reference to Example 1, is mainly different from Example 1 as follows. The distance sensor 1 is arranged vertically above the air guide plate 18, specifically, the distance sensor 1 is fixed to the upper frame of the small window 12, and the laser beam 20 acts on the inner wall of the small window air guide plate 18. The length of the laser change is the vertical distance of the rotation of the air guide plate 18. The opening of the small window 12 can be calculated by the single-chip control board 3 (processing module) according to the different positions of the air guide plate 18. The controller 13 includes a storage module, a processing module, and a program stored in the storage module and can be run on the processing module. When the processing module executes the program, the following steps are implemented: S21, real-time acquisition of the distance L (cm) from the reference point to the guide plate 17 fed back by the distance measuring sensor 1, real-time acquisition of the wind speed V0 (m / s) fed back by the wind speed sensor 2, and then correction of the obtained wind speed V0 to obtain the average wind speed V1 of the small window wind; correction of the measured data according to the square tube flow empirical formula (V1 = C*V0) can obtain the average wind speed V1 of the small window wind, where C is the correction coefficient, which can usually be obtained through field measurement or laboratory experiments. In this example, C takes a value of 0.85; S22, obtain the preset parameters of the small window 12, including the height h (cm) of the small window 12, the length K (cm) of the small window 12, the distance e (cm) between the laser emission point of the displacement sensor 2 and the edge of the window frame of the small window 12, and the area A (cm) of the air inlet of the dust cover. 2 ); S23, calculating the opening size b (cm) of the air guide plate 18 according to the following formula (V), wherein the value of b is the length of a vertical ray extending from the junction of the window frame of the small window 12 and the air guide plate 17 to the small window air guide plate 18; The wind direction angle Φ at the small window 12 is calculated according to the following formula (VI): Φ=arctan(hL) / a…………(VI) The air volume passing through the dust cover 22 is equal to the air volume at the entrance of the small window 12. The wind speed V2 (m / s) at the wind guide plate 18 of the small window 12 is calculated according to the following formula (VII): In the formula, K represents the length of the small window, and V1 represents the average wind speed of the air entering the small window; S24, output the opening size b of the air guide plate 18, the wind direction angle Φ (°) at the small window 12, and the wind speed V2 (m / s) at the air guide plate 18.

[0021] Taking a ventilation window of a livestock and poultry house as an example, the height h of the tested ventilation window is 25 cm, the thickness a is 16.5 cm, the sum of the distances c between the window and the reference point of the ranging sensor is 21.5 cm, and the area A of the air inlet of the dust cover is 1080 cm 2, the angle θ between the guide plate and the small window frame is 15°, the length K of the small window is 54cm, and the distance e between the laser emission point of the displacement sensor and the edge of the small window frame in Example 2 is 2cm. The angle opening range of the small window is between 0 and 75°, and the accuracy of the equipment is verified when the small window opening is 65%. Using the sensor arrangement method in Example 1, the measured data of the displacement sensor is 8cm. The small window opening is calculated to be 67% by formula (Ⅰ), and the error is within 3%. When converted to the angle of the small window, the error is +2°. Using the sensor arrangement method and calculation formula in Example 2, the measured data of the displacement sensor is 18cm. The small window opening is calculated to be 63% by formula (Ⅴ), and the error is within 3%. When converted to the angle of the small window, the error is -2°. The reading of the wind speed sensor is 1.5m / s. The air intake of the small window is calculated to be 0.162m by formula (Ⅲ). 3 / s; calculated by formula (VII), the air inlet speed at the small window air guide plate is 1.22m / s. The handheld anemometer is used to test and the air inlet speed at the small window air guide plate is 1.24m / s, with an error within 2%. After verification, the error of this system is within ±3%, and the accuracy is good. At present, the way to monitor the opening of ventilation windows in livestock and poultry houses is to monitor indirectly through the running time of the motor or to use the method of marking scales on the window frame for manual visual inspection. The results are inaccurate and the errors are large. There are even fewer ways to monitor the ventilation performance of small windows, such as the air intake and wind speed. Most of them are measured manually with a handheld anemometer, which has a large workload, a high risk factor and cannot be detected in real time. Real-time monitoring of ventilation volume is almost impossible to achieve, and the error of manual measurement is extremely large.

[0022] The livestock and poultry house ventilation window performance real-time monitoring system of the present invention can be used to perform automatic real-time online monitoring, without the need for breeders to frequently climb to high altitudes with handheld wind speed sensor equipment to operate and measure. It is very convenient and safe, with high efficiency, and avoids measurement errors caused by human factors. The scheme of the present invention can accurately and quickly monitor the inlet wind speed at the wind guide plate 18 without installing a wind speed sensor at the wind guide plate, fundamentally avoiding the problem of the measuring instrument affecting the inlet flow field.

Claims

1. A real-time monitoring system for the performance of ventilation windows in livestock and poultry houses, comprising a window (12) installed on a side wall (25) of a livestock and poultry house (11), characterized in that: A dust cover (22) is installed on the air inlet side of the small window (12), and an air guide plate (18) and a flow guide plate (17) are arranged on the air outlet side of the small window (12); the air guide plate (18) is connected to a driving mechanism for controlling the opening and closing state of the air guide plate (18), and the space between the air guide plate (18) and the flow guide plate (17) serves as a necessary passage for airflow to enter the livestock and poultry house; a controller (13) is arranged near the small window (12), a distance sensor (1) is connected to the controller (13) and is installed above or below the flow guide plate (17), the distance sensor (1) is used to obtain the distance from the measurement reference point to the flow guide plate (17), and a wind speed sensor (2) is connected to the controller (13) and is installed in the chamber of the dust cover (22), and the wind speed sensor (2) is used to obtain the air inlet speed.

2. The real-time monitoring system for ventilation window performance of livestock and poultry houses according to claim 1 is characterized in that: The distance measuring sensor (1) is arranged vertically below the wind deflector (18); the controller (13) comprises a storage module, a processing module and a program stored in the storage module and executable on the processing module, and the processing module implements the following steps when executing the program: S11, obtaining in real time the distance L from the reference point to the guide plate fed back by the distance measuring sensor, obtaining in real time the wind speed V0 fed back by the wind speed sensor, and then correcting the obtained wind speed V0 to obtain the average wind speed V1=C*V0 of the wind entering the small window, where C is the correction coefficient; S12, obtaining preset small window parameters, including the height h of the small window, the thickness a of the small window, the sum c of the distance between the small window and the reference point of the distance measuring sensor, and the area A of the air inlet of the dust cover; S13, calculate the opening size b of the air guide plate according to the following formula (I): Calculate the wind direction angle Φ at the small window according to the following formula (Ⅱ): Φ=arctan L / c…………(Ⅱ) Calculate the air volume Q of the small window according to the following formula (III): Q=V1*A…………(Ⅲ) The wind speed V2 at the small window wind guide plate is calculated according to the following formula (Ⅳ): In the formula, K represents the length of the small window, and V1 represents the average wind speed of the air entering the small window; S14, output the opening size b of the air guide plate, the wind direction angle Φ at the small window and the air intake volume Q.

3. The real-time monitoring system for ventilation window performance of livestock and poultry houses according to claim 1 is characterized in that: The distance measuring sensor (1) is arranged vertically above the wind deflector (18); the controller (13) comprises a storage module, a processing module and a program stored in the storage module and executable on the processing module, and the processing module implements the following steps when executing the program: S21, obtaining in real time the distance L (cm) from the reference point to the guide plate fed back by the distance measuring sensor, obtaining in real time the wind speed V0 (m / s) fed back by the wind speed sensor, and then correcting the obtained wind speed V0 to obtain the average wind speed V1 = C*V0 of the wind entering the small window, where C is the correction coefficient; S22, obtaining preset small window parameters, including the height h of the small window, the length K of the small window, the area A of the air inlet of the dust cover, the angle θ between the guide plate (17) and the upper frame of the small window (12), and the distance e between the laser emission point of the displacement sensor and the edge of the window frame of the small window (12); S23, calculate the opening size b of the air guide plate according to the following formula (V), The wind direction angle Φ at the small window is calculated according to the following formula (VI): Φ=arctan(hL) / a…………(VI) The wind speed V2 at the small window air guide plate is calculated according to the following formula (VII): In the formula, K represents the length of the small window, and V1 represents the average wind speed of the air entering the small window; S24, output the opening size b of the air guide plate, the wind direction angle Φ at the small window, and the wind speed V2 at the air guide plate.

4. The real-time monitoring system for ventilation window performance of livestock and poultry houses according to any one of claims 1 to 3, characterized in that: The distance measuring sensor (1) is mounted on a support plate (23), and the support plate is fixedly connected to a side wall (25).

5. The real-time monitoring system for ventilation window performance of livestock and poultry houses according to claim 4 is characterized by: The guide plate (17) is arranged obliquely upward.

6. The real-time monitoring system for ventilation window performance of livestock and poultry houses according to claim 5 is characterized by: The controller (13) is fixedly mounted on the side wall (25).

7. The real-time monitoring system for ventilation window performance of livestock and poultry houses according to claim 6 is characterized by: The wind speed sensor (2) is installed in the middle of the chamber of the dust cover (22).

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