Closed poultry feed conversion ratio intelligent measurement device and method for flat-bred chickens

Abstract

The application discloses a closed poultry feed conversion rate intelligent measuring instrument for flat raising chickens, a measuring method, a chicken identity recognition method, a chicken number recognition method and a chicken feeding judgment method. The closed poultry feed conversion rate intelligent measuring instrument for flat raising chickens comprises a frame, a rotating door mechanism, an infrared recognition system, an RFID recognition system, a chicken number recognition system and a central controller. The infrared recognition system, the RFID recognition system and the chicken number recognition system are connected with the central controller. The rotating door mechanism comprises a rotating motor, a rotating shaft and three rotating doors. The single chicken is driven into the second accommodating cavity to feed by the rotating door mechanism. After the chicken feeds, the chicken that has fed is driven out of the second accommodating cavity by the rotating door mechanism. The stress reaction of the chicken is avoided, the feeding comfort of the chicken is ensured, the detection accuracy is ensured, the reference value is high, the artificial cost is reduced, and the instrument has the advantages of accuracy and high efficiency.

Description

Technical Field

[0001] This invention relates to the field of intelligent poultry farming technology, specifically to a closed-loop intelligent poultry feed conversion rate measuring instrument and method for free-range chickens. Background Technology

[0002] In recent years, with the continuous improvement of people's living standards, the demand for chicken has been increasing, which has led to the rapid development of poultry farming. Poultry farming is an important component of my country's agriculture and occupies a vital position in the national economy. While the rapid development of poultry farming has boosted rural development, it has also made it particularly important to reduce farming costs and thus increase economic benefits.

[0003] One way to reduce breeding costs is to improve feed conversion ratio. Currently, most broiler farms in my country still measure chicken production data manually. Manual measurement is not only time-consuming and labor-intensive, but the measured feed intake and weight gain are easily influenced by the subjective bias of the measurers, affecting the accuracy of the data. With the rapid development of science and technology in my country, farms and entrepreneurs are increasingly demanding more intelligent breeding equipment. Therefore, it is crucial to invent equipment that can automatically measure poultry feed intake and feed conversion efficiency to reduce breeding costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a closed-loop intelligent feed conversion rate measuring instrument for free-range chickens. This closed-loop intelligent feed conversion rate measuring instrument for free-range chickens improves the reference value of the measured feed conversion rate and reduces labor costs, offering advantages such as accuracy, high efficiency, and cost savings.

[0005] The second objective of this invention is to provide a method for identifying chickens based on tag RSSI values.

[0006] A third objective of this invention is to provide a method for identifying the number of chickens.

[0007] The fourth objective of this invention is to provide a method for measuring the feed conversion ratio of closed-loop poultry feed for free-range chickens using an intelligent measuring instrument.

[0008] The objective of this invention is achieved through the following technical solution: This closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens includes a frame, a rotating door mechanism, an infrared identification system, an RFID identification system, a chicken quantity identification system, and a central controller. The infrared identification system, the RFID identification system, and the chicken quantity identification system are all connected to the central controller.

[0009] The frame has a rear plate, a side plate, and an opening for mounting a rotating door on its rear, one, and the other sides, forming a semi-open inner cavity. The rotating door mechanism includes a rotary motor, a rotating shaft, and three rotating doors. The rotating shaft is mounted on the other side of the frame, and one end of each of the three rotating doors is fixed to the rotating shaft. The three rotating doors are evenly distributed around the circumference of the rotating shaft. One rotating door is located in the inner cavity and divides the inner cavity into a first receiving cavity and a second receiving cavity. The other two rotating doors are sealed in the opening. The rotary motor is connected to the rotating shaft. The front end of the frame has an inlet communicating with the first receiving cavity. The second receiving cavity has a chicken weighing system. The rear plate has a feeding hole, and a feeding device is located behind the rear plate. The rotary motor, the chicken weighing system, and the feeding device are all connected to a central controller.

[0010] Preferably, the revolving door includes a long door panel and a short door panel, one end of the long door panel is mounted on a pivot, the short door panel is fixed to the other end of the long door panel, and there is an angle between the long door panel and the short door panel.

[0011] Preferably, the front end of the frame is provided with an entrance limiting mechanism, which includes two limiting plates. The two limiting plates are fixed to the front end of the frame by profiles, and the entrance is located between the two limiting plates.

[0012] Preferably, the infrared recognition system includes a first infrared sensor, a second infrared sensor, and a third infrared sensor. The first infrared sensor is installed on the side panel and located in the first accommodating cavity to determine whether chickens have entered the first accommodating cavity. The second infrared sensor is installed on the side panel and directly opposite the rotating shaft to determine the position of the rotating door. The third infrared sensor is installed on the side panel and located in the second accommodating cavity to determine whether chickens are feeding.

[0013] Preferably, the RFID identification system includes a card reader, a first RFID antenna, a second RFID antenna, and a tag. The first RFID antenna is installed on the bottom surface of the first accommodating cavity, the second RFID antenna is installed on the rear plate, the tag is installed on the chicken, the card reader is located in the central processing unit, and both the first RFID antenna and the second RFID antenna are connected to the card reader.

[0014] The method for chicken identification based on tag RSSI values ​​is characterized by employing the closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens described in the first objective, and includes the following steps:

[0015] I. Read the information of the tags several times and save the information of the tags;

[0016] II. Determine whether all of the read tag information belongs to only one chicken:

[0017] If so, save the identity information to confirm that the chicken in the identity information is the chicken being collected;

[0018] If not, the RSSI value of the tag corresponding to each chicken identity is filtered, the distance between the chicken and the antenna is estimated by the tag RSSI value, and the tag information closest to the antenna is saved as the identity information of the chicken that is feeding.

[0019] Preferably, the chicken count recognition system includes a data processing chip and a count camera. The count camera is mounted on the upper end of the first accommodating cavity via a bracket. The data processing chip is located in the central processing unit, and the count camera is connected to the data processing chip.

[0020] The method for identifying the number of chickens, using the closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens as described in the first objective, includes the following steps:

[0021] S1. Based on the number of cameras, collect visible light images of chickens in the first accommodating cavity to form a dataset, and preprocess the dataset to form a training set and a validation set.

[0022] S2. Based on the training set and validation set, construct a deep learning model for chicken target detection;

[0023] S3. Deploy deep learning models onto data processing chips;

[0024] S4. When a chicken enters the first accommodating cavity, the infrared recognition system is triggered. The data processing chip with a deep learning model processes the visible light images captured in real time by the cameras and sends the processing results to the central controller.

[0025] The method for judging chicken feeding, using the closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens as described in the first purpose, includes the following steps:

[0026] a. When the chicken enters the second accommodating cavity and its head passes through the feeding hole, the third infrared sensor is triggered, and the feeding camera acquires a visible light image of the chicken feeding in the feeding area.

[0027] b. Preprocess the acquired image by performing Gaussian filtering.

[0028] c. Perform three-frame difference image processing on the acquired image;

[0029] d. Frame difference method: If there is a change in the image, it is judged that the chicken is pecking at the food; if there is no change, it is judged that the chicken is not pecking at the food.

[0030] A closed-loop intelligent method for measuring feed conversion ratio in free-range chickens, using a closed-loop intelligent feed conversion ratio measuring instrument for free-range chickens, includes the following steps:

[0031] A. When a chicken enters the first containment cavity, the first infrared sensor is triggered. The chicken count identification system detects that only one chicken has entered the first containment cavity. The first RFID antenna of the RFID identification system begins to read the chicken's identity information, while the central controller is awakened and the rotating door is driven to rotate 120 degrees to drive the chicken in the first containment cavity into the second containment cavity. If the chicken successfully enters the second containment cavity, the chicken weighing system detects that a chicken has successfully entered. The second RFID antenna of the RFID identification system reads the chicken's identity information again. The central controller compares the chicken identity information read by the first RFID antenna and the second RFID antenna to see if it is the same chicken.

[0032] B. Before the chickens in the second accommodating cavity are fed, the central controller records the amount of feed remaining in the feed trough at this moment, and controls the feed weighing system to collect the weight data of multiple chickens at a certain frequency and perform mean filtering processing as the weight data of the chickens before feeding.

[0033] C. When the chicken finishes eating or the third infrared sensor is not triggered and the set time is reached, the central controller records the chicken's weight and feeding time again. The central controller then drives the rotating door to rotate 120 degrees to take the chicken out of the second accommodating cavity.

[0034] D. The central controller records the remaining feed amount again and subtracts it from the previous record value to determine the amount of feed consumed by the chickens this time. It then uploads the recorded chicken identification information, feed intake, weight, and feeding duration to the industrial control computer and cloud database.

[0035] The present invention has the following advantages over the prior art:

[0036] 1. This invention uses a rotating door mechanism to drive a single chicken into the second accommodating cavity to eat. After the chicken has finished eating, the rotating door mechanism is used to drive the chicken out of the second accommodating cavity. This ensures the comfort of the chicken while avoiding stress, and also ensures the accuracy of the detection, high reference value, and reduced labor costs. It has the advantages of accuracy and efficiency.

[0037] 2. The present invention uses an infrared identification system to determine whether chickens have entered the first cavity of the measuring device, whether they have successfully entered the second cavity, and whether they have been feeding. The number identification system determines how many chickens have entered the first cavity of the measuring device, thereby ensuring that each feeding is done by a single chicken, which further guarantees the accuracy of the detection results.

[0038] 3. The closed poultry feed conversion rate intelligent measuring instrument of the present invention adopts an RFID identification system to ensure that the chicken entering the first and second accommodating cavities in sequence is the same chicken, thereby improving the identification rate and further ensuring the accuracy of the test results.

[0039] 4. The closed-type intelligent poultry feed conversion rate measuring instrument and measuring method of the present invention have high integration, simple interface operation, and easy assembly and replacement of each functional component, thereby improving the practicality of the device. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the first orientation of the closed-type intelligent poultry feed conversion rate measuring instrument of the present invention.

[0041] Figure 2 This is a schematic diagram of the second direction structure of the closed-type intelligent poultry feed conversion rate measuring instrument of the present invention.

[0042] Figure 3 This is a third-dimensional structural diagram of the closed-type intelligent poultry feed conversion rate measuring instrument of the present invention.

[0043] Figure 4 This is a side view of the closed-type intelligent poultry feed conversion rate measuring instrument of the present invention.

[0044] Figure 5 This is a rear view of the closed-type intelligent poultry feed conversion rate measuring instrument of the present invention.

[0045] Figure 6 This is a top view of the closed-type intelligent poultry feed conversion rate measuring instrument of the present invention.

[0046] Figure 7 This is a bottom view of the closed-type intelligent poultry feed conversion rate measuring instrument of the present invention.

[0047] Among them, 1 is the frame, 2 is the rotating door mechanism, 3 is the central controller, 4 is the rear plate, 5 is the side plate, 6 is the opening, 7 is the rotary motor, 8 is the rotating shaft, 9 is the rotating door, 10 is the first accommodating cavity, 11 is the second accommodating cavity, 12 is the entrance, 13 is the chicken weighing system, 14 is the feeding device, 15 is the guide plate, 16 is the industrial control computer, 17 is the base, 18 is the connector, 19 is the long door panel, 20 is the short door panel, 21 is the entrance limiting mechanism, 22 is the limiting plate, 23 is the profile, 24 is the first infrared sensor, 25 is the second infrared sensor, 26 is the third infrared sensor, 27 is the first RFID antenna, 28 is the second RFID antenna, 29 is the feed trough, 30 is the lifting platform, 31 is the conveying pipe, 32 is the feeder, 33 is the feed hopper, 34 is the mounting frame, 35 is the alarm light, 36 is the feeding camera, 37 is the feed weighing system, and 38 is the quantity camera. Detailed Implementation

[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0049] like Figures 1 to 7 As shown, a closed-type intelligent poultry feed conversion ratio measuring instrument for free-range chickens includes a frame, a rotating door mechanism, an infrared identification system, an RFID identification system, a chicken count identification system, and a central controller. The infrared identification system, RFID identification system, and chicken count identification system are all connected to the central controller. The frame has a rear plate, a side plate, and an opening for mounting the rotating door on its rear end, one side, and the other side, forming a semi-open inner cavity. The rotating door mechanism includes a rotating motor, a rotating shaft, and three rotating doors. The rotating shaft is mounted on the frame. On the other side, one end of each of the three rotating doors is fixed to a pivot, and the three rotating doors are evenly distributed around the circumference of the pivot. One rotating door is located in the inner cavity and divides the inner cavity into a first receiving cavity and a second receiving cavity. The other two rotating doors are sealed at the opening. The rotating motor is connected to the pivot. The front end of the frame has an inlet communicating with the first receiving cavity. The second receiving cavity has a chicken weighing system. The rear plate has a feeding hole, and a feeding device is located behind the rear plate. The rotating motor, the chicken weighing system, and the feeding device are all connected to the central controller. Specifically, to further ensure that the chickens pass through the first receiving cavity and the second receiving cavity in sequence and exit from the second receiving cavity, a guide plate is provided in the second receiving cavity. One end of this guide plate is fixed to the side plate, and the other end is fixed to the rear plate. To further improve the integration, an industrial control computer is provided at the top of the frame. This industrial control computer is connected to the central controller, which is mounted on the mounting bracket of the feeding device.

[0050] When the rotating mechanism is in its initial state, one of the rotating doors (let's call this the first rotating door) is located in the middle of the inner cavity, dividing it into a first receiving cavity and a second receiving cavity. These first and second receiving cavities are distributed sequentially from the front to the rear of the frame. When the first infrared sensor of the infrared recognition system detects a chicken entering the first receiving cavity, the chicken count recognition system determines whether there is only one chicken in the first receiving cavity. If so, the central controller sends a command to drive the rotating motor, which in turn drives the rotating door to rotate. During the rotation of the second rotating door (the one located in the first receiving cavity), the chicken in the first receiving cavity is driven to the second receiving cavity. In the second containment cavity, the RFID identification system determines whether the chickens in the second containment cavity are the same chickens that were in the first containment cavity. At the same time, the third infrared sensor in the infrared identification system determines whether the chickens in the second containment cavity are feeding through the feeding hole. After the chickens finish feeding, the chicken weighing system transmits the weight and time of the chickens before and after feeding to the central controller. The central controller then processes the data and sends the results to the industrial control computer and cloud database to complete the feed conversion rate measurement. Meanwhile, the central controller controls the rotary motor to drive the rotating door to rotate, and the second rotating door drives the chickens out of the second containment cavity.

[0051] To improve the reliability of the rotating mechanism, a rotating optical axis is used. This rotating mechanism also includes a base and connecting parts. The rotating optical axis is mounted on the middle of the other side of the frame via the base. Three rotating doors are fixed to the rotating optical axis via the connecting parts, with an angle of 120° between adjacent rotating doors. When the first rotating door is in the middle of the inner cavity, the other two rotating doors (i.e., the second and third rotating doors) are located on the other side of the frame to seal the opening, thereby preventing chickens from entering the first and second receiving cavities from the other side of the frame, thus ensuring the accuracy of the detection. To reduce design costs, the chicken weighing system and the feed weighing system in the feeding device of this embodiment both use existing weighing systems.

[0052] The revolving door includes a long door panel and a short door panel. One end of the long door panel is mounted on a rotating shaft, and the short door panel is fixed to the other end of the long door panel, with an angle between them. Specifically, one end (inner end) of the long door panel is fixed to the rotating optical shaft via a connector, and the other end (outer end) is fixed to the short door panel, with an angle between them. This allows for more effective control of the chickens' movement, improving work efficiency.

[0053] The front end of the frame is equipped with an entrance limiting mechanism, which includes two limiting plates. The two limiting plates are fixed to the front end of the frame by profiles, and the entrance is located between the two limiting plates. This structure is simple. The two limiting plates are fixed to both sides of the entrance by aluminum profiles, thereby effectively guiding a single chicken into the first receiving cavity, thus further improving the detection accuracy.

[0054] The infrared recognition system includes a first infrared sensor, a second infrared sensor, and a third infrared sensor. The first infrared sensor is mounted on the side panel and located in the first accommodating cavity to determine whether chickens have entered the first accommodating cavity. The second infrared sensor is mounted on the side panel and directly opposite the rotating shaft to determine the position of the revolving door. The third infrared sensor is mounted on the back of the rear panel to determine whether chickens are feeding. These three infrared sensors are sequentially installed in appropriate positions to provide reliable information to the central controller, ensuring that the central processing unit can accurately issue corresponding control commands, thus improving the reliability of the intelligent system.

[0055] The RFID identification system includes a reader, a first RFID antenna, a second RFID antenna, and a tag. The first RFID antenna is mounted on the bottom surface of the first accommodating cavity, the second RFID antenna is mounted on the rear panel, the tag is attached to the chicken, and the reader is located in the central processing unit. Both the first and second RFID antennas are connected to the reader. Specifically, the positions of the first and second RFID antennas can be adjusted appropriately according to the size of the chicken. This use of dual RFID antennas to identify feeding chickens can further improve the accuracy of the detection results.

[0056] The method for chicken identification based on tag RSSI values ​​is characterized by employing the closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens described in the first objective, and includes the following steps:

[0057] I. Read the information of the tags several times and save the information of the tags;

[0058] II. Determine whether all of the read tag information belongs to only one chicken:

[0059] If so, save the identity information to confirm that the chicken in the identity information is the chicken being collected;

[0060] If not, the RSSI value of the tag corresponding to each chicken identity is filtered, the distance between the chicken and the antenna is estimated by the tag RSSI value, and the tag information closest to the antenna is saved as the identity information of the chicken that is feeding.

[0061] The above method uses RSSI values ​​to determine the relative distance and identify the chickens that are feeding, in order to determine whether it is the same chicken before and after feeding, thereby further improving the accuracy of the detection.

[0062] The feeding device includes a feed trough, a lifting platform, a conveying pipe, a feeder, and a feed bucket. The lifting platform is installed behind the rear plate via a feed weighing system. The feed trough is installed on the lifting platform. One end of the conveying pipe is connected to the feed trough, and the other end is connected to the feed bucket via the feeder. The feed bucket is installed above the feed trough via a mounting bracket. The feeder is connected to a central controller. This simple structure ensures accurate feed delivery from the feed bucket to the feed trough, preventing feed from falling outside the trough and affecting the accuracy of the detection data. Simultaneously, operators can manually set the feed dispensing amount of the automatic feeding device through the central processor, achieving different feeding amounts for chickens of different ages, thus reducing feed waste and improving the overall economic efficiency of the equipment.

[0063] To ensure the normal operation and reliability of the feeding device, it also includes an alarm light and a feeding camera to monitor whether the chickens are feeding. The feeding camera is installed at the lower end of the mounting frame and connected to the central controller, facing the feed trough. The alarm light is installed at the top of the mounting frame and connected to the central controller. When the central controller detects that the weight value detected by the feed weighing system is less than the set value, the feeder starts, automatically adding feed to the feed trough to ensure the chickens have sufficient feed. Conversely, if the central controller detects no change in the weight value detected by the feed weighing system after the feeder starts, the feed trough is considered empty, and the alarm light will sound, reminding the operator to replenish the feed trough in time to ensure the normal operation of the equipment.

[0064] The central controller includes a controller, a converter, a communication transceiver, and an N-channel MOSFET. The chicken counting system is connected to the controller via the converter, the infrared recognition system is connected to the controller via the N-channel MOSFET, and the RFID recognition system, chicken weighing system, and feed weighing system of the feeding device are all connected to the controller via the communication transceiver. The rotary motor and the feeder of the feeding device are also connected to the controller via the N-channel MOSFET. Specifically, in this embodiment, the controller is an STM32F103 microcontroller, the converter is a USB-TTL converter, the communication transceiver is an RS485-TTL communication transceiver, and the N-channel MOSFET acts as a circuit switch to connect each component to the controller. The chicken counting system includes a data processing chip and a camera. The counting camera is mounted on the upper end of the first accommodating cavity via a bracket, the data processing chip is located in the central processing unit, and the counting camera is connected to the data processing chip. In this embodiment, the data processing chip uses a pyAI-K210 development board, and the counting camera uses an OV2642 counting camera to ensure detection accuracy.

[0065] The method for identifying the number of chickens, using the closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens as described in the first objective, includes the following steps:

[0066] S1. Based on the number of cameras, collect visible light images of chickens in the first accommodating cavity to form a dataset, and preprocess the dataset to form a training set and a validation set.

[0067] Specifically, after the number of cameras acquire visible light images of chickens in the first accommodating cavity, the pyAI-K210 development board randomly flips, rotates, adjusts the brightness, and resizes these visible light images to supplement the images using basic image processing, thus obtaining a dataset. Then, the annotation tools on the MaixHub website are used to annotate the dataset, and the annotated dataset is then divided into a training set and a validation set.

[0068] S2. Based on the training and validation sets, a deep learning model for chicken target detection is constructed. Specifically, the allocated training set is used on the MaixHub website. The training parameters are set as follows: the number of iterations is 100, the batch size is 32, the maximum learning rate is 0.0001, and the bounding box is limited to 5. Cloud training is then performed to finally complete the construction of a deep learning model for chicken target detection in a feeder based on visible light images using YOLOv2.

[0069] S3. Deploy the deep learning model to the data processing chip; specifically, download the trained model, burn the model to the 32G SD card of the development board, run it through the MaixPy IDE, connect the board to the computer using the IDE, connect the development board via serial port, open the main.py file provided by MaixHub, modify the model address to the address specified on the board's SD card, and finally burn the entire main.py file to the pyAI-k210 development board to complete the model deployment.

[0070] S4. When a chicken enters the first accommodating cavity, the infrared recognition system is triggered. The data processing chip with a deep learning model processes the visible light images captured in real time by the cameras and sends the processing results to the central controller.

[0071] The above-mentioned method for identifying the number of chickens ensures that only a single chicken is feeding, thereby guaranteeing the accuracy of feed conversion rate detection.

[0072] A closed-loop intelligent method for measuring feed conversion ratio in free-range chickens, using a closed-loop intelligent feed conversion ratio measuring instrument for free-range chickens, includes the following steps:

[0073] A. When a chicken enters the first cavity, the first infrared sensor is triggered. The chicken count identification system detects that only one chicken has entered the first cavity. The first RFID antenna of the RFID identification system begins to read the chicken's identity information, waking up the central controller and driving the rotating door to rotate 120 degrees to herd the chicken in the first cavity into the second cavity. If the chicken successfully enters the second cavity, the chicken weighing system detects that a chicken has successfully entered. The second RFID antenna of the RFID identification system re-reads the chicken's identity information. The central controller compares the chicken identity information read by the first and second RFID antennas to see if they belong to the same chicken. Before this, if no chicken enters the measuring device to feed, the rotating door is in a stopped state, and the RFID identification system and infrared identification system are in a waiting state. When the rotating door is in a stopped state, one of the rotating doors (i.e., the first rotating door) is located in the middle of the inner cavity.

[0074] B. Before the chickens in the second accommodating cavity are fed, the central controller records the amount of feed remaining in the feed trough at this moment, and controls the feed weighing system to collect the weight data of multiple chickens at a certain frequency and perform mean filtering processing as the weight data of the chickens before feeding.

[0075] C. When the chicken finishes eating, or when the third infrared sensor is not triggered and the set time is reached, the central controller records the chicken's weight and feeding time again. The central controller then drives the rotating door to rotate 120 degrees to take the chicken out of the second accommodating cavity.

[0076] Meanwhile, to further ensure whether the chickens have eaten, a third infrared sensor and a feeding camera are used in conjunction. When the chicken's head passes through the feeding hole, the third infrared sensor is triggered, and the visible light image captured by the feeding camera utilizes the following technical means:

[0077] a. When the chicken enters the second accommodating cavity and its head passes through the feeding hole, the third infrared sensor is triggered, and the feeding camera acquires a visible light image of the chicken feeding in the feeding area.

[0078] b. Preprocess the acquired image by performing Gaussian filtering.

[0079] c. Perform three-frame difference image processing on the acquired image;

[0080] d. Frame difference method: If there is a change in the image, it is determined that the chicken is pecking at the food; if there is no change, it is determined that the chicken is not pecking at the food.

[0081] e. When the chickens are not pecking at food, the rotating door mechanism will automatically drive them away by sending serial port information to the central controller.

[0082] D. The central controller records the amount of feed remaining at this time and calculates the difference between it and the previous recorded value as the amount of feed consumed by the chickens this time. It also uploads the recorded information on the chickens' identity, feed intake, weight, and feeding duration to the industrial control computer and the cloud database.

[0083] The above-described specific embodiments are preferred embodiments of the present invention and are not intended to limit the present invention. Any other changes or equivalent substitutions made without departing from the technical solution of the present invention are included within the protection scope of the present invention.

Claims

1. A closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens, characterized in that, It includes a frame, a revolving door mechanism, an infrared identification system, an RFID identification system, a chicken count identification system, and a central controller, wherein the infrared identification system, the RFID identification system, and the chicken count identification system are all connected to the central controller; The frame has a rear plate, a side plate, and an opening for mounting a rotating door on its rear, one, and the other sides, forming a semi-open inner cavity. The rotating door mechanism includes a rotary motor, a rotating shaft, and three rotating doors. The rotating shaft is mounted on the other side of the frame, and one end of each of the three rotating doors is fixed to the rotating shaft. The three rotating doors are evenly distributed around the circumference of the rotating shaft. One rotating door is located in the inner cavity and divides the inner cavity into a first receiving cavity and a second receiving cavity. The other two rotating doors are sealed in the opening. The rotary motor is connected to the rotating shaft. The front end of the frame has an inlet communicating with the first receiving cavity. The second receiving cavity has a chicken weighing system. The rear plate has a feeding hole, and a feeding device is located behind the rear plate. The rotary motor, the chicken weighing system, and the feeding device are all connected to a central controller. The infrared recognition system includes a first infrared sensor, a second infrared sensor, and a third infrared sensor. The first infrared sensor is installed on the side panel and located in the first accommodating cavity to determine whether chickens have entered the first accommodating cavity. The second infrared sensor is installed on the side panel and directly opposite the pivot to determine the position of the rotating door. The third infrared sensor is installed on the back of the rear panel to determine whether chickens are eating. The chicken count recognition system includes a data processing chip and a count camera. The count camera is mounted on the upper end of the first accommodating cavity via a bracket. The data processing chip is located in the central processing unit, and the count camera is connected to the data processing chip. The method for identifying the number of chickens includes the following steps: S1. Based on the number of cameras, collect visible light images of chickens in the first accommodating cavity to form a dataset, and preprocess the dataset to form a training set and a validation set. S2. Based on the training set and validation set, construct a deep learning model for chicken target detection; S3. Deploy deep learning models onto data processing chips; S4. When a chicken enters the first accommodating cavity, the infrared recognition system is triggered. The data processing chip with a deep learning model processes the visible light images captured in real time by the cameras and sends the processing results to the central controller. Methods for determining whether chickens are feeding include the following steps: a. When the chicken enters the second accommodating cavity and its head passes through the feeding hole, the feeding camera acquires visible light images of the chickens feeding in the feeding area; b. Preprocess the acquired image by performing Gaussian filtering. c. Perform three-frame difference image processing on the acquired image; d. Frame difference method: If there is a change in the image, it is judged that the chicken is pecking at the food; if there is no change, it is judged that the chicken is not pecking at the food.

2. The closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens according to claim 1, characterized in that, The revolving door includes a long door panel and a short door panel. One end of the long door panel is mounted on a pivot, and the short door panel is fixed to the other end of the long door panel. The long door panel and the short door panel have an included angle.

3. The closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens according to claim 1, characterized in that, The front end of the frame is provided with an entrance limiting mechanism, which includes two limiting plates. The two limiting plates are fixed to the front end of the frame by profiles, and the entrance is located between the two limiting plates.

4. The closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens according to claim 1, characterized in that, The RFID identification system includes a card reader, a first RFID antenna, a second RFID antenna, and a tag. The first RFID antenna is installed on the bottom surface of the first accommodating cavity, the second RFID antenna is installed on the rear plate, the tag is installed on the chicken, and the card reader is located in the central processing unit. Both the first RFID antenna and the second RFID antenna are connected to the card reader.

5. A method for identifying chickens based on tag RSSI values, characterized in that, The closed-type intelligent poultry feed conversion ratio measuring instrument for free-range chickens as described in any one of claims 1 and 4 includes the following steps: I. Read the information of the tags several times and save the information of the tags; II. Determine whether all of the read tag information belongs to only one chicken: If so, save the identity information to confirm that the chicken in the identity information is the chicken being collected; If not, the RSSI value of the tag corresponding to each chicken identity is filtered, the distance between the chicken and the antenna is estimated by the tag RSSI value, and the tag information closest to the antenna is saved as the identity information of the chicken that is feeding.

6. A closed-loop intelligent method for determining feed conversion ratio in free-range chickens, characterized in that, The closed-type intelligent poultry feed conversion rate measuring instrument for free-range chickens as described in any one of claims 1 to 4 includes the following steps: A. When a chicken enters the first containment cavity, the first infrared sensor is triggered. The chicken count identification system detects that only one chicken has entered the first containment cavity. The first RFID antenna of the RFID identification system begins to read the chicken's identity information, while the central controller is awakened and the rotating door is driven to rotate 120 degrees to drive the chicken in the first containment cavity into the second containment cavity. If the chicken successfully enters the second containment cavity, the chicken weighing system detects that a chicken has successfully entered. The second RFID antenna of the RFID identification system reads the chicken's identity information again. The central controller compares the chicken identity information read by the first RFID antenna and the second RFID antenna to see if it is the same chicken. B. Before the chickens in the second accommodating cavity are fed, the central controller records the amount of feed remaining in the feed trough at this moment, and controls the feed weighing system to collect the weight data of multiple chickens at a certain frequency and perform mean filtering processing as the weight data of the chickens before feeding. C. When the chicken finishes eating or the third infrared sensor is not triggered and the set time is reached, the central controller records the chicken's weight and feeding time again. The central controller then drives the rotating door to rotate 120 degrees to take the chicken out of the second accommodating cavity. D. The central controller records the remaining feed amount again and subtracts it from the previous record value to determine the amount of feed consumed by the chickens this time. It then uploads the recorded chicken identification information, feed intake, weight, and feeding duration to the industrial control computer and cloud database.

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