Sheep flock grouping control method and system based on RFID identification

Abstract

The invention relates to the technical field of intelligent breeding automation, in particular to a sheep flock grouping control method and system based on RFID identification, and the method comprises the steps: obtaining corresponding variety information and weight information from an RFID electronic ear tag through a corresponding RFID reader-writer, and controlling the opening of a corresponding variety fence gate based on the variety information, based on the weight information, controlling the opening of the corresponding weight column gate; transmitting power feedback adjustment is carried out based on the comparison result of the signal intensity obtained by monitoring and the signal intensity threshold value when the corresponding RFID reader-writer reads the information, and corresponding gate opening duration feedback adjustment is carried out under the condition after transmitting power feedback adjustment and the comparison result of the passing speed obtained by monitoring and the preset passing speed. According to the invention, by adjusting the transmitting power of the corresponding RFID reader-writer and adjusting the preset opening duration of the corresponding gate, the reliability and grouping accuracy of the system are improved, and accurate column dividing is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent breeding automation, and in particular to a sheep flocking control method and system based on RFID identification. BACKGROUND

[0002] In the field of intelligent management of animal husbandry, automatic flocking management of sheep is an important means to improve breeding efficiency and precision feeding. Traditional sheep management mainly relies on manual driving and visual recognition, which has the problems of low efficiency, high labor intensity, and insufficient control flocking accuracy. Although some automatic flocking devices exist in the prior art, most of them have single functions and cannot realize comprehensive automation integration of physical measurement, data analysis and flocking control, especially in the aspect of precise flocking based on individual identification and real-time data analysis. Therefore, there is an urgent need for a method that can accurately distinguish and control sheep flocking to realize fine management of sheep.

[0003] Chinese Patent Publication No. CN107726954A discloses an automatic working system for physical measurement and penning of animals in animal husbandry. The related technical solution includes a channel, a weight sensor, an RFID reader / writer, a distance sensor, an air pressure gate, a flocking gate, a PLC host computer, a Bluetooth communicator and a display screen. The channel includes a weighing channel and a penning channel. The weight sensor is installed at the bottom of the weighing channel. The RFID reader / writer is installed on the side of the weighing channel. The distance sensor is installed at the top and side of the weighing channel, respectively. The PLC host computer is installed at the side end of the channel. The PLC host computer is connected with the weight sensor, the RFID reader / writer, the distance sensor, the air pressure gate, the flocking gate, the Bluetooth communicator and the display, respectively. The automatic working system for physical measurement and penning of animals in animal husbandry can automatically measure the physical signs of animals and pen the animals, and simultaneously realize real-time uploading and analysis of data, automatic control and high work efficiency. However, the technical solution only involves the basic process of detection and execution, and the control mode is mainly based on pre-set fixed parameters, which lacks dynamic feedback and adjustment based on real-time state. The movement mode of sheep flock is irregular, and cannot be adaptively adjusted according to the real-time behavior and state of the sheep flock, so that the execution parameters cannot be intelligently adjusted. SUMMARY

[0004] Therefore, the present application provides a sheep flocking control method and system based on RFID identification to overcome the problem that the flocking efficiency of the automatic penning system in the prior art is easily disturbed due to the lack of response detection and feedback adjustment.

[0005] To achieve the above-mentioned purpose, the present application provides a sheep flocking control method based on RFID identification, which comprises:

[0006] Each sheep is fitted with an RFID electronic ear tag, which stores a unique ID, breed information, and weight information for each sheep.

[0007] A primary grouping channel and a secondary grouping channel are set up, and each sheep is driven into the primary grouping channel and the secondary grouping channel in turn. The sheep are identified by the preset folding rules corresponding to each channel, and the corresponding sheep folding information is obtained by several RFID readers set in the folding channel. The primary grouping channel has preset breed folding rules based on breed information, and the secondary grouping channel has preset weight folding rules based on weight information.

[0008] Real-time monitoring of the signal strength of the first RFID reader in the primary grouping channel and the second RFID reader in the secondary grouping channel when reading information, and real-time monitoring of the passage speed of sheep when passing through breed-separated gates and weight-separated gates;

[0009] Based on the comparison result of the signal strength and the signal strength threshold, the transmission power is adjusted by feedback, and based on the change of signal strength after the transmission power is adjusted by feedback and the comparison result of the passage speed and the preset passage speed, the corresponding gate opening time is adjusted by feedback.

[0010] After completing the corresponding gate opening duration feedback adjustment, the corresponding gate opening duration feedback adjustment is performed again based on the comparison result between sheep density and sheep density threshold.

[0011] Furthermore, the column recognition process includes:

[0012] When the sheep enter the primary grouping channel, the first RFID reader attempts to read the information in the RFID electronic ear tag worn by the sheep. If the reading fails, the primary feedback adjustment of the transmission power feedback adjustment is triggered.

[0013] When the sheep enter the secondary grouping channel, the second RFID reader attempts to read the information in the RFID electronic ear tag worn by the sheep. If the reading fails, the secondary feedback adjustment of the transmission power feedback adjustment is triggered.

[0014] Furthermore, the process of triggering the first-level feedback regulation includes,

[0015] The transmission power of the first RFID reader is adjusted based on the comparison result showing that the first signal strength corresponding to the first RFID reader is less than or equal to a first signal strength threshold. Specifically, the transmission power of the first RFID reader is increased based on the signal strength difference.

[0016] Wherein, the signal strength difference is the difference between the first signal strength threshold and the first signal strength;

[0017] The process of triggering the secondary feedback adjustment comprises,

[0018] determining, based on the comparison result that the second signal strength corresponding to the second RFID reader is less than or equal to the second signal strength threshold, to adjust the transmission power of the second RFID reader, wherein the transmission power of the second RFID reader is increased based on a signal strength offset value,

[0019] wherein the signal strength offset value is the difference between the second signal strength threshold and the second signal strength.

[0020] Further, the process of increasing the transmission power of the first RFID reader based on the signal strength difference value comprises:

[0021] increasing the transmission power of the first RFID reader based on the comparison result of the signal strength difference value and a preset signal strength difference value, wherein the increase amplitude of the transmission power corresponding to the first RFID reader is positively correlated with the signal strength difference value;

[0022] The process of increasing the transmission power of the second RFID reader based on the signal strength offset value comprises:

[0023] increasing the transmission power of the second RFID reader based on the comparison result of the signal strength offset value and a preset signal strength offset value, wherein the increase amplitude of the transmission power corresponding to the second RFID reader is positively correlated with the signal strength offset value.

[0024] Further, after increasing the transmission power of the first RFID reader based on the signal strength difference value, it further comprises,

[0025] continuously monitoring the adjusted first signal strength within a first adjustment waiting duration,

[0026] if the first signal strength continuously less than or equal to the first signal strength threshold, generating a first level fault signal and triggering an alarm, and simultaneously controlling all breed section gates in the primary grouping channel to open to a first preset safe opening duration, so as to guide the sheep to pass through to the emergency area;

[0027] After increasing the transmission power of the second RFID reader based on the signal strength offset value, it further comprises,

[0028] continuously monitoring the adjusted second signal strength within a second adjustment waiting duration,

[0029] If the second signal strength continues to be less than or equal to the second signal strength threshold, a second level fault signal is generated and an alarm is triggered, and at the same time, all weight sub-gate doors in the secondary sub-group channel are opened to a second preset safe opening duration to guide the sheep to pass through to the emergency area.

[0030] Further, when the gate opening duration of the breed sub-gate is adjusted, after increasing the transmission power of the first RFID reader, the first signal strength is re-monitored within a preset time duration, and the first signal strength average is calculated. Based on the comparison result that the first signal strength average is greater than the first signal strength threshold, an instruction is generated to set the opening duration of the corresponding breed sub-gate to a preset breed gate opening duration;

[0031] When the gate opening duration of the weight sub-gate is adjusted, after increasing the transmission power of the second RFID reader, the second signal strength is re-monitored within a preset time duration, and the second signal strength average is calculated. Based on the comparison result that the second signal strength average is greater than the second signal strength threshold, an instruction is generated to set the opening duration of the corresponding weight sub-gate to a preset weight gate opening duration.

[0032] Further, after determining the preset breed gate opening duration, the preset breed gate opening duration is adjusted based on the comparison result of the passing speed and the preset passing speed;

[0033] After determining the preset weight gate opening duration, the preset weight gate opening duration is adjusted based on the comparison result of the passing speed and the preset passing speed;

[0034] If the passing speed is less than or equal to the preset passing speed, the preset breed gate opening duration or the preset weight gate opening duration is extended based on the comparison result of the speed difference value and the preset speed difference value, wherein the extension range of the preset breed gate opening duration and the preset weight gate opening duration is positively correlated with the speed difference value;

[0035] The speed difference value is the difference between the preset passing speed and the passing speed.

[0036] Further, after extending the preset breed gate opening duration or the preset weight gate opening duration based on the speed difference value, it further comprises,

[0037] Continuously monitoring the subsequent passing speed of the sheep after passing through the corresponding gate,

[0038] If the subsequent passing speed is still less than or equal to the preset passing speed, the feedback adjustment of the gate opening time is re-performed based on the comparison result of the sheep density in the current corresponding channel and the sheep density threshold value;

[0039] If the sheep density is greater than the sheep density threshold value, the preset breed gate opening time or the preset weight gate opening time is again prolonged based on a density difference value.

[0040] The density difference value is the difference between the sheep density and the sheep density threshold value.

[0041] Further, a weighing device is arranged at the entrance of the primary grouping channel to weigh each sheep, the first RFID reader is connected with the weighing device and writes the weight information of each sheep after weighing into the RFID electronic ear tag corresponding to the sheep to update the weight information.

[0042] The application further provides a sheep grouping control system based on RFID identification, comprising:

[0043] An RFID electronic ear tag is worn on each sheep, which stores the unique ID, breed information and weight information corresponding to each sheep;

[0044] A primary grouping channel is provided with a first RFID reader and a plurality of breed compartment gates connected with the first RFID reader, the first RFID reader is used to read the breed information in the RFID electronic ear tag corresponding to the sheep passing through the primary grouping channel, and send the read breed information as a control signal to the corresponding breed compartment gate to control the opening and closing thereof;

[0045] A plurality of secondary grouping channels are provided, the entrances of the plurality of secondary grouping channels are in one-to-one correspondence with the plurality of breed compartment gates and are in communication therewith;

[0046] The secondary grouping channel is provided with a second RFID reader and a plurality of weight compartment gates connected with the second RFID reader, the second RFID reader is used to read the weight information in the RFID electronic ear tag corresponding to the sheep passing through the secondary grouping channel, and send the read weight information as a control signal to the corresponding weight compartment gate to control the opening and closing thereof;

[0047] A monitoring unit comprises a signal monitoring module and a passing speed monitoring module, the signal monitoring module is used to monitor the signal strength corresponding to the first RFID reader and the second RFID reader when reading information in real time, and the passing speed monitoring module is used to monitor the passing speed of the sheep when passing through the breed compartment gate and the weight compartment gate in real time;

[0048] The control adjustment unit is connected with the monitoring unit, the first RFID reader, the second RFID reader, the breed pen gate and the weight pen gate respectively, to generate a transmission power adjustment instruction based on the comparison result of the signal strength and the signal strength threshold value and send it to the corresponding first RFID reader or second RFID reader, and generate a gate opening duration adjustment instruction based on the signal strength change after transmission power feedback adjustment and the comparison result of the passing speed and the preset passing speed and send it to the corresponding breed pen gate or weight pen gate.

[0049] The control adjustment unit is also used to generate a gate opening duration adjustment instruction again based on the comparison result of the sheep density obtained by the monitoring unit and the sheep density threshold value and send it to the corresponding breed pen gate or weight pen gate.

[0050] Compared with the prior art, the sheep group control method based on RFID identification has the beneficial effects that the first RFID reader and the second RFID reader obtain the corresponding breed information and weight information from the RFID electronic ear tags respectively, and control the corresponding breed pen gate to open based on the breed information as a control signal, and control the corresponding weight pen gate to open based on the weight information as a control signal; then the comparison result of the signal strength obtained by the first RFID reader and the second RFID reader when reading information and the signal strength threshold value is adjusted based on the transmission power feedback, and the comparison result of the passing speed obtained by monitoring and the preset passing speed is adjusted based on the transmission power feedback adjustment and the corresponding gate opening duration feedback; or the breed information and the weight information are matched with the preset composite group strategy to guide the sheep to the high-quality sheep shed. By adjusting the transmission power of the corresponding RFID reader to automatically enhance the RFID reading capability, and by adjusting the preset opening duration of the corresponding gate to ensure the synchronization of gate action and animal passing, the reliability, group accuracy and precise penning of the system are improved.

[0051] Further, when the corresponding RFID reader fails to read the information initially, the corresponding RFID power can be adjusted adaptively, which fundamentally solves the recognition failure problem caused by weak signal, ensures the smooth operation of the automatic process, and effectively improves the group efficiency; and quantitative hierarchical power adjustment is realized based on the comparison result of the signal strength difference and the signal strength offset value with the corresponding preset parameters, which effectively enhances the reading capability of the corresponding RFID reader.

[0052] Further, the present application also sets up multi-stage adjustment waiting time length and emergency response mechanism, so that the system can quickly identify and start the fault protection strategy when the corresponding RFID reader appears hardware failure or serious interference, which avoids the risk of channel congestion and sheep retention caused by infinite loop adjustment, and guarantees the continuity of sheep diversion process through directional guidance to the emergency area, thereby improving the reliability of the system.

[0053] Further, the present application also constructs a dual-coupling feedback mechanism based on the average signal strength and the passing speed, for accurately controlling the gate opening time; by predicting the sheep wandering behavior and setting sufficient passing time in advance, the risk of gate injury to sheep is fundamentally avoided, and the unnecessary waiting time of the gate is minimized, thereby improving the throughput efficiency of the whole group flow process.

[0054] Further, the present application also introduces a multi-stage precise adjustment mechanism based on the density difference of sheep, so that the system can intelligently distinguish between channel congestion and individual abnormalities, and dynamically optimize the gate opening strategy, thereby improving the overall passing efficiency of the sheep group while effectively guaranteeing the animal welfare and the reliability of the system.

[0055] Further, the present application also skips the subsequent body weight group flow process when high-quality breeds (first level) are identified, and directly guides them to the high-quality sheep shed, thereby improving the processing efficiency of high-value sheep; and no matter from the first channel or the second channel, the high-quality sheep selected finally enter the same high-quality sheep shed, which guarantees the uniformity and convenience of management. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 Fig. 1 is a module schematic diagram of a sheep group control system based on RFID identification in the embodiment;

[0057] Figure 2 Fig. 2 is a flowchart of a sheep group control method based on RFID identification in the embodiment;

[0058] Figure 3 Fig. 3 is a logic determination diagram for triggering first-stage feedback adjustment based on the first signal strength in the embodiment;

[0059] Figure 4 Fig. 4 is a logic determination diagram for determining the gate opening time feedback adjustment based on the average first signal strength and the speed difference in the embodiment. DETAILED DESCRIPTION

[0060] In order to make the purpose and advantages of the present application clearer and more apparent, the present application will be further described below in conjunction with the embodiments; it should be understood that the specific embodiments described herein are only used to explain the present application, and do not limit the present application.

[0061] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that the embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0062] It should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0063] Please refer to Figure 1 As shown in the figure, it is a module schematic diagram of a sheep flocking control system based on RFID identification in the present embodiment. The system in the present embodiment includes RFID electronic ear tags, a first-level flocking channel, a second-level flocking channel, a first RFID reader, a second RFID reader, a breed separation gate, a weight separation gate, a monitoring unit, and a control and adjustment unit.

[0064] The RFID electronic ear tag is worn on each sheep and stores the unique corresponding ID, breed information and weight information of each sheep; the first-grade group channel is provided with a first RFID reader and a plurality of breed compartment gates connected with the first RFID reader, the first RFID reader is used to read the breed information in the RFID electronic ear tag corresponding to the sheep passing through the first-grade group channel, and the read breed information is sent to the corresponding breed compartment gate as a control signal to control the opening and closing of the breed compartment gate; the second-grade group channel is provided with a plurality of second-grade group channels, the entrances of the plurality of second-grade group channels are in one-to-one correspondence with the plurality of breed compartment gates; the second-grade group channel is provided with a second RFID reader and a plurality of weight compartment gates connected with the second RFID reader, the second RFID reader is used to read the weight information in the RFID electronic ear tag corresponding to the sheep passing through the second-grade group channel, and the read weight information is sent to the corresponding weight compartment gate as a control signal to control the opening and closing of the weight compartment gate; the monitoring unit includes a signal monitoring module and a passing speed monitoring module, the signal monitoring module is used to monitor the signal strength corresponding to the first RFID reader and the second RFID reader when reading information in real time, and the passing speed monitoring module is used to monitor the passing speed of the sheep when passing through the breed compartment gate and the weight compartment gate in real time; the control adjustment unit is connected with the monitoring unit, the first RFID reader, the second RFID reader, the breed compartment gate and the weight compartment gate, respectively, to generate a transmission power adjustment instruction based on the comparison result of the signal strength and the signal strength threshold value and send it to the corresponding first RFID reader or second RFID reader, and to generate a gate opening duration adjustment instruction based on the signal strength change after feedback adjustment of the transmission power and the comparison result of the passing speed and the preset passing speed and send it to the corresponding breed compartment gate or weight compartment gate; the control adjustment unit is also used to generate a gate opening duration adjustment instruction again based on the comparison result of the sheep density obtained by the monitoring unit and the sheep density threshold value and send it to the corresponding breed compartment gate or weight compartment gate.

[0065] In the embodiment, the high-quality gate opening instruction can also be generated based on the matching of the breed information and the weight information with the preset composite group strategy and sent to the corresponding high-quality compartment gate in the first-grade group channel or the second-grade group channel.

[0066] In the embodiment, the first RFID reader is arranged at the entrance of the first-level grouping channel, and the second RFID readers are arranged at the entrances of the second-level grouping channels; the signal monitoring module obtains the corresponding signal strength by monitoring the received signal strength indication (RSSI) value of the RFID reader, and obtains the first signal strength H when monitoring the first RFID reader and obtains the second signal strength G when monitoring the second RFID reader; the passing speed monitoring module includes one or more of the photoelectric sensor, the infrared sensor or the video image sensor arranged near the corresponding breed pen gate and the weight pen gate. The breed of each breed pen gate is different, and the weight threshold of each weight pen gate is different.

[0067] Referring to Figure 2 As shown in the figure, it is a flowchart of a sheep grouping control method based on RFID identification in the embodiment, and the flow of the embodiment at least includes the following steps:

[0068] S1: wearing an RFID electronic ear tag for each sheep, wherein the electronic ear tag stores the unique ID, breed information and weight information of each sheep;

[0069] S2: setting the first-level grouping channel and the second-level grouping channel, and driving the sheep into the first-level grouping channel and the second-level grouping channel in turn to identify the sheep according to the preset penning rules corresponding to each channel;

[0070] S3: obtaining the corresponding sheep penning information through the RFID readers arranged in the penning channel, wherein the first-level grouping channel is provided with a preset breed penning rule according to the breed information, and the second-level grouping channel is provided with a preset weight penning rule according to the weight information;

[0071] S4: monitoring the corresponding signal strength of the first RFID reader in the first-level grouping channel and the second RFID reader in the second-level grouping channel when reading information in real time, and monitoring the corresponding passing speed of the sheep when passing through the breed pen gate and the weight pen gate in real time;

[0072] S5: performing the transmission power feedback adjustment based on the comparison result of the signal strength and the signal strength threshold, and performing the feedback adjustment of the opening duration of the corresponding gate based on the comparison result of the signal strength after the transmission power feedback adjustment and the preset passing speed;

[0073] S6: after completing the feedback adjustment of the opening duration of the corresponding gate, further performing the feedback adjustment of the opening duration of the corresponding gate based on the comparison result of the sheep density and the sheep density threshold.

[0074] In the embodiment, each sheep has a unique corresponding ID and basic information, wherein the basic information includes breed information, weight information, male or female information, and health status information, etc. The basic information is in mapping association with the ID, and the RFID reader reads the information by first verifying each sheep through the ID to prevent sheep loss or sheep outside the sheep pen from entering. The several secondary grouping channels and the several breed pen gates are set for different breeds of sheep, for example, if the first RFID obtains that the breed of the current sheep is sheep, the corresponding sheep breed pen gate is opened to drive the sheep to the corresponding sheep secondary grouping channel.

[0075] The preset breed pen rule is that the first RFID reader sends the read breed information to the central processing unit, and the central processing unit pre-processes the breed information to improve the information quality. The breed pen gate is provided with a first signal receiver and a first controller. The central processing unit sends the pre-processed breed information to the first signal receiver in the breed pen gate. The first controller is in communication connection with the first signal receiver and controls the opening of the corresponding breed pen gate based on the received breed information.

[0076] The preset weight pen rule is that the second RFID reader also sends the read weight information to the central processing unit, and the central processing unit pre-processes the weight information to improve the information quality. The weight pen gate is provided with a second signal receiver and a second controller. The central processing unit sends the pre-processed weight information to the second signal receiver in the weight pen gate. The second controller is in communication connection with the second signal receiver and controls the opening of the corresponding weight pen gate based on the received weight information.

[0077] When the sheep passes through the primary grouping channel and the secondary grouping channel, the monitoring unit respectively monitors the first RFID reader, the second RFID reader, the first signal receiver, and the second signal receiver, and then sends the monitoring result to the control adjustment unit. The control adjustment unit can feed back and adjust the transmission power of the first RFID reader or the second RFID reader based on the comparison of the monitored signal strength and the signal strength threshold. Based on the signal strength change after the transmission power feedback adjustment and the comparison of the monitored passing speed and the preset passing speed, the control adjustment unit can feed back and adjust the opening duration of the breed pen gate or the weight pen gate. The signal strength refers to the received signal strength measured by the monitoring unit after the RFID reader successfully demodulates the RFID electronic ear tag signal. After completing the feedback adjustment of the corresponding gate opening duration, the control adjustment unit further feeds back and adjusts the opening duration of the corresponding gate based on the comparison of the sheep density and the sheep density threshold. The corresponding gate includes the breed pen gate and the weight pen gate.

[0078] If the breed information or the weight information matches any one of the high-quality breed information and the high-quality weight information in the preset compound grouping strategy, the high-quality pen gate on the current primary grouping channel or secondary grouping channel is controlled to open, the sheep is guided to the high-quality sheep house, and more careful breeding is performed.

[0079] In the penning process, the transmission power of the first RFID reader and the second RFID reader can be adjusted in a timely manner according to the monitoring result of the monitoring unit to ensure the RFID identification rate, the adaptive adjustment of the RFID power effectively avoids the identification failure caused by weak signal, and the data integrity is ensured from the source; and the opening duration of the breed pen gate and the weight pen gate is adjusted in a timely manner according to the monitoring result to ensure that the gate action is synchronized with the sheep passing process, the adaptive control of the gate action not only avoids the risk of sheep injury, but also reduces unnecessary waiting time; the related control process can effectively improve the penning efficiency after adjustment.

[0080] The automatic grouping control and management process of the sheep herd is as follows: first, the breed of the sheep is determined by the first RFID reader to correspondingly open the breed pen gate arranged on the primary grouping channel; the sheep enters the secondary grouping channel connected with the breed pen gate; then the weight of the sheep is determined by the second RFID reader to correspondingly open the weight pen gate arranged on the secondary grouping channel; and finally, several sheep of the same breed and within the preset weight range are bred into the same sheep house. If the corresponding breed information of the sheep matches the high-quality breed information or the weight information matches the high-quality weight information in the monitoring process, the sheep at this time is marked as a high-quality sheep, the corresponding high-quality pen gate on the primary grouping channel is controlled to open or the corresponding high-quality pen gate on the secondary grouping channel is controlled to open, and the high-quality sheep is bred into the high-quality sheep house; wherein, the high-quality pen gate corresponding to the breed is arranged in the several breed pen gates, and the high-quality pen gate corresponding to the weight is arranged in the several weight pen gates, and the high-quality sheep can enter the high-quality sheep house through the high-quality pen gate on the primary grouping channel or the high-quality pen gate on the secondary grouping channel.

[0081] Specifically, when the sheep enters the primary grouping channel, the first RFID reader attempts to read the information in the RFID electronic ear tag worn by the sheep, if the reading is successful, the breed information corresponding to the sheep is called, and if the reading fails, the primary feedback adjustment of the transmission power feedback adjustment is triggered; when the sheep enters the secondary grouping channel, the second RFID reader attempts to read the information in the RFID electronic ear tag worn by the sheep, if the reading is successful, the weight information corresponding to the sheep is called, and if the reading fails, the secondary feedback adjustment of the transmission power feedback adjustment is triggered.

[0082] In the embodiment, when the sheep enters the first-level grouping channel, the first RFID reader is started to perform preliminary reading. If the first reading is successful, the corresponding breed partition gate is opened according to the breed information read. If the first reading fails, the first-level feedback adjustment is triggered. After adjustment, the reading is tried again. If the reading is successful, the corresponding breed partition gate is opened. If the reading fails, the first-level feedback adjustment is triggered again. The operation is repeatedly executed. When the sheep enters the second-level grouping channel, the second RFID reader is started to perform preliminary reading. If the first reading is successful, the corresponding weight partition gate is opened according to the weight information read. If the first reading fails, the second-level feedback adjustment is triggered. The subsequent operation is performed according to the operation process of the first-level feedback adjustment.

[0083] Referring to FIG. 6, Figure 3 FIG. 6 is a logic decision diagram for triggering the first-level feedback adjustment based on the first signal strength in the embodiment, as shown. The process of triggering the first-level feedback adjustment includes determining to adjust the transmission power of the first RFID reader based on the comparison result that the first signal strength corresponding to the first RFID reader is less than or equal to the first signal strength threshold. The transmission power of the first RFID reader is increased based on a signal strength difference value. The signal strength difference value is the difference between the first signal strength threshold and the first signal strength. The process of triggering the second-level feedback adjustment includes determining to adjust the transmission power of the second RFID reader based on the comparison result that the second signal strength corresponding to the second RFID reader is less than or equal to the second signal strength threshold. The transmission power of the second RFID reader is increased based on a signal strength offset value. The signal strength offset value is the difference between the second signal strength threshold and the second signal strength.

[0084] In the embodiment, the first signal strength H and the second signal strength G are acquired by the monitoring unit. The first signal strength threshold H0 and the second signal strength threshold G0 are not fixed values. The values thereof are set according to the mapping relationship between different device models (such as the transmission power of the reader and the antenna gain), environmental factors (such as the channel material and humidity interference), and the target identification rate (such as the required 99% or 99.9% identification success rate) stored in the database. The data sources of the database include the reader performance parameter manual provided by the equipment manufacturer, the industry application standard (such as the Animal Radio Frequency Identification Technology Specification), and the baseline data accumulated in the initial installation and debugging stage of the system through a large number of tests (such as placing ear tags at different positions in the channel) and the successful identification data accumulated after continuous optimization in the historical operation process. Subsequent other parameters can also be set according to the setting of the first signal strength threshold H0 and the second signal strength threshold G0.

[0085] In the embodiment, the first signal strength threshold H0 can be set as -65 dBm. The comparison process based on H and H0 is specifically as follows:

[0086] If H is less than or equal to H0, it indicates that the current first RFID reader corresponding to the received signal strength is relatively weak, which is easy to cause the breed information corresponding to the sheep to be unable to be accurately identified. At this time, if the reading fails, it is determined that the energy transmitted by the current first RFID reader is relatively small. The difference between the first signal strength threshold H0 and the first signal strength H can be calculated and recorded as a signal strength difference D. The transmission power of the first RFID reader is increased based on the signal strength difference D. If H is greater than H0, it indicates that the current first RFID reader corresponding to the received signal strength is relatively strong. At this time, if the reading fails, it is determined that there is a multi-tag collision or electromagnetic interference, and the instruction switching anti-collision algorithm is started, or the control execution mechanism (such as the air pressure injection device installed on the first-level group channel) is used to disperse animals to reduce the number of simultaneous identification, or an alarm is sent to notify personnel to perform manual re-inspection.

[0087] In the embodiment, the second signal strength threshold G0 can be set to -66dBm. The comparison between the second signal strength G and G0 is specifically as follows:

[0088] If G is less than or equal to G0, it also indicates that the current second RFID reader corresponding to the received signal strength is relatively weak, which causes the weight information corresponding to the sheep to be unable to be accurately identified. The difference between the second signal strength threshold G0 and the second signal strength G can be calculated and recorded as a signal strength offset value R. The transmission power of the second RFID reader is increased based on the signal strength offset value R. If G is greater than G0, it also indicates that the current second RFID reader corresponding to the received signal strength is relatively strong. At this time, if the reading fails, the instruction switching anti-collision algorithm can be started, or the control execution mechanism (such as the air pressure injection device installed on the second-level group channel) is used to disperse animals to reduce the number of simultaneous identification, or an alarm is sent to notify personnel to perform manual re-inspection.

[0089] Specifically, the process of increasing the transmission power of the first RFID reader based on the signal strength difference includes: increasing the transmission power of the first RFID reader based on the comparison result of the signal strength difference and the preset signal strength difference, wherein the increase amplitude of the transmission power of the first RFID reader and the signal strength difference are in a positive correlation.

[0090] In the embodiment, the signal strength difference D is the difference between the first signal strength threshold H0 and the first signal strength H, the greater D is, the smaller H is, and the smaller H is, the greater the transmission power of the first RFID reader needs to be, therefore, the transmission power is positively correlated with D. A preset signal strength difference D0 corresponding to the signal strength difference D is set for comparison, in order to more accurately determine the increase of the transmission power, D0 can be divided into a first preset signal strength difference D1 and a second preset signal strength difference D2, which can be exemplarily set as D1 = 3 dBm and D2 = 5 dBm, and the comparison process based on D, D1 and D2 is specifically as follows:

[0091] If D is less than or equal to D1, the control adjustment unit generates a corresponding first transmission power adjustment instruction, and then controls the first RFID reader to increase by 15% on the basis of the original transmission power based on the instruction; if D is greater than D1 and less than or equal to D2, the control adjustment unit generates a corresponding second transmission power adjustment instruction, and then controls the first RFID reader to increase by 25% on the basis of the original transmission power based on the instruction; if D is greater than D2, the control adjustment unit generates a corresponding third transmission power adjustment instruction, and then controls the second RFID reader to increase by 40% on the basis of the original transmission power based on the instruction. It can be understood that the increase of the original transmission power can also be set to other required values, for example, when D is less than or equal to D1, the original transmission power can be increased by 13%.

[0092] Specifically, the process of increasing the transmission power of the second RFID reader based on the signal strength offset value includes: increasing the transmission power of the second RFID reader based on the comparison result of the signal strength offset value and the preset signal strength offset value, wherein the increase of the transmission power of the second RFID reader corresponding to the signal strength offset value is positively correlated with the signal strength offset value.

[0093] In the embodiment, the signal strength offset value R is the difference between the second signal strength threshold G0 and the second signal strength G, the greater R is, the smaller G is, and the smaller G is, the greater the transmission power of the second RFID reader needs to be, therefore, the transmission power is positively correlated with R. A preset signal strength offset value R0 corresponding to the signal strength offset value R is set for comparison, in order to more accurately determine the increase of the transmission power, R0 can be divided into a first preset signal strength offset value R1 and a second preset signal strength offset value R2, which can be exemplarily set as R1 = 2 dBm and R2 = 4 dBm, and the comparison process based on R, R1 and R2 is specifically as follows:

[0094] If R is less than or equal to R1, the control adjustment unit generates a corresponding fourth transmission power adjustment instruction, and then controls the second RFID reader to increase by 10% on the basis of the original transmission power based on the instruction; if R is greater than R1 and less than or equal to R2, the control adjustment unit generates a corresponding fifth transmission power adjustment instruction, and then controls the second RFID reader to increase by 20% on the basis of the original transmission power based on the instruction; if R is greater than R2, the control adjustment unit generates a corresponding sixth transmission power adjustment instruction, and then controls the second RFID reader to increase by 35% on the basis of the original transmission power based on the instruction. It can be understood that the increase range of the original transmission power corresponding to the second RFID reader can also be set to other required values, for example, when R is greater than R2, it can also be increased by 33% on the basis of the original transmission power.

[0095] Specifically, after increasing the transmission power of the first RFID reader based on the signal strength difference, a feedback adjustment step is further included, in which the first signal strength after adjustment is continuously monitored within a first adjustment waiting time, and if the first signal strength continuously less than or equal to the first signal strength threshold, a first-level fault signal is generated and an alarm is triggered, and at the same time, all breed section gates in the first-level grouping channel are opened to a first preset safe opening time to guide the sheep to pass through to the emergency area; after increasing the transmission power of the second RFID reader based on the signal strength offset value, a feedback adjustment step is further included, in which the second signal strength after adjustment is continuously monitored within a second adjustment waiting time, and if the second signal strength continuously less than or equal to the second signal strength threshold, a second-level fault signal is generated and an alarm is triggered, and at the same time, all weight section gates in the second-level grouping channel are opened to a second preset safe opening time to guide the sheep to pass through to the emergency area.

[0096] In the embodiment, by setting an observation period (including a first adjustment waiting time and a second adjustment waiting time), if the first signal strength H continuously less than or equal to the first signal strength threshold H0 after the transmission power of the first RFID reader is increased, or the second signal strength G continuously less than or equal to the second signal strength threshold G0 after the transmission power of the second RFID reader is increased, it is determined that the first RFID reader or the second RFID reader may have a hardware failure or a serious interference, and the system will no longer attempt to adjust indefinitely, but start a fault emergency mode, open all gates on the first-level grouping channel or the second-level grouping channel and alarm, prevent the sheep from blocking the channel, and guide the problem sheep to a specific emergency area for manual processing. The first adjustment waiting time can be set to 10s and the second adjustment waiting time can be set to 12s.

[0097] Please refer to Figure 4 As shown in the figure, it is the logic decision diagram for determining the feedback adjustment of the gate opening duration based on the first signal strength average and the speed difference in the embodiment. When the feedback adjustment of the gate opening duration is performed for the breed division gate, after the transmission power of the first RFID reader is increased, a plurality of first signal strengths are obtained by re-monitoring within a preset duration, and a first signal strength average is calculated. Based on the comparison result that the first signal strength average is greater than the first signal strength threshold, an instruction is generated to set the opening duration of the corresponding breed division gate to the preset breed gate opening duration. When the feedback adjustment of the gate opening duration is performed for the weight division gate, after the transmission power of the second RFID reader is increased, a plurality of second signal strengths are obtained by re-monitoring within a preset duration, and a second signal strength average is calculated. Based on the comparison result that the second signal strength average is greater than the second signal strength threshold, an instruction is generated to set the opening duration of the corresponding weight division gate to the preset weight gate opening duration.

[0098] In the embodiment, the feedback adjustment of the gate opening duration is coupled and associated with the signal strength obtained when the RFID reader is monitored. After the transmission power of the corresponding RFID reader is increased, multiple monitoring is performed within a preset duration, and the monitored signal strengths are averaged. Then, the signal strength average is compared with the signal strength threshold. If the signal strength average is greater than the signal strength threshold, it indicates that the signal strength of the single sheep passing through the reading area presents a sharp fluctuation (indicating that the sheep is lingering or repeatedly advancing and retreating at a relatively close distance from the RFID reader), the system can predict that the sheep behaves abnormally and the passing speed is slow, and then a fixed opening duration is preset for the corresponding gate to be passed by the sheep, providing a larger safety margin for the sheep passing through. In the embodiment, the preset duration is exemplarily set to 10s.

[0099] In the embodiment, the first signal strength average Q is obtained and compared with the first signal strength threshold H0. If Q is less than or equal to H0, it indicates that the position of the sheep is gradually moving away from the reading area and advancing towards the breed division gate. At this time, the control adjustment unit dynamically adjusts the gate opening duration according to the passing speed of the sheep monitored by the monitoring unit through the corresponding breed division gate. The principle of dynamically adjusting the gate opening duration according to the passing speed is that the smaller the passing speed, the longer the adjustment range of the gate opening duration. If Q is greater than H0, it indicates that the position of the sheep does not present a trend of gradually moving away from the reading area within the preset duration. At this time, it is predicted that the sheep behaves abnormally, and the opening duration of the corresponding breed division gate can be set to the preset breed gate opening duration first, and then the preset breed gate opening duration is dynamically adjusted according to the passing speed. After the sheep passes through the breed division gate, the gate is automatically closed. In the embodiment, the preset breed gate opening duration can be exemplarily set to 16s.

[0100] The second signal strength average W is also acquired and compared with the second signal strength threshold G0; if W is less than or equal to G0, it indicates that the position of the sheep is gradually moving away from the reading area and moving towards the weight sorting gate, at this time the control adjustment unit dynamically adjusts the gate opening time according to the passing speed of the sheep through the corresponding weight sorting gate; if W is greater than G0, it indicates that the position of the sheep does not show a trend of gradually moving away from the reading area within the preset time, at this time it can also be predicted that the sheep behaves abnormally, the opening time of the corresponding weight sorting gate can be set to the preset weight gate opening time first, and then the preset weight gate opening time is dynamically adjusted according to the passing speed, and the gate is automatically closed after the sheep passes through the weight sorting gate. In this embodiment, the preset weight gate opening time can be exemplarily set to 15s.

[0101] In this embodiment, if the first RFID reader reads successfully for the first time or the second RFID reader reads successfully for the first time, the first signal strength or the second signal strength is also re-acquired within the preset time, and then a new first signal strength average or a new second signal strength average is re-calculated; the new first signal strength average is compared with the first signal strength threshold H0 to determine whether the gate opening time needs to be dynamically adjusted based on the passing speed of the sheep through the corresponding weight sorting gate, or the opening time of the corresponding breed sorting gate needs to be set to a new preset breed gate opening time first, and then the new preset breed gate opening time is dynamically adjusted according to the passing speed, which can be exemplarily set to 10s; the new second signal strength average is compared with the second signal strength threshold G0 to determine whether the gate opening time needs to be dynamically adjusted based on the passing speed of the sheep through the corresponding weight sorting gate, or the opening time of the corresponding weight sorting gate needs to be set to a new preset weight gate opening time first, and then the new preset weight gate opening time is dynamically adjusted according to the passing speed, which can be exemplarily set to 10s.

[0102] In this embodiment, the preset breed gate opening time is a value dynamically adjusted according to the comparison between the first signal strength average Q and the first signal strength threshold H0, and the preset weight gate opening time is a value dynamically adjusted according to the comparison between the second signal strength average W and the second signal strength threshold G0.

[0103] Specifically, after determining the preset breed gate opening duration, the preset breed gate opening duration is adjusted based on the comparison result of the passing speed and the preset passing speed; after determining the preset weight gate opening duration, the preset weight gate opening duration is adjusted based on the comparison result of the passing speed and the preset passing speed; if the passing speed is less than or equal to the preset passing speed, the preset breed gate opening duration or the preset weight gate opening duration is extended based on the comparison result of the speed difference value and the preset speed difference value, wherein the extension range of the preset breed gate opening duration and the preset weight gate opening duration is positively correlated with the speed difference value; the speed difference value is the difference between the preset passing speed and the passing speed.

[0104] In the embodiment, the speed difference value V is the difference between the preset passing speed M0 and the passing speed M, the larger V is, the smaller M is, and the smaller M is, the larger the extension range of the preset breed gate opening duration or the preset weight gate opening duration is, therefore, the extension range of the preset breed gate opening duration and the preset weight gate opening duration is positively correlated with the speed difference value V. A preset speed difference value V0 corresponding to the speed difference value V is set, in order to more accurately determine the extension range, the preset speed difference value V0 can be divided into a first preset speed difference value V1 and a second preset speed difference value V2, which can be exemplarily set as V1=0.3 m / s and V2=0.5 m / s, and the comparison process based on V, V1 and V2 is specifically as follows:

[0105] If V is less than or equal to V1, the control adjustment unit generates a corresponding first opening time length adjustment instruction, and then controls the corresponding breed classification gate to extend 30% on the basis of the original preset breed gate opening time length or generates a corresponding second opening time length adjustment instruction, and then controls the corresponding weight classification gate to extend 33% on the basis of the original preset weight gate opening time length; if V is greater than V1 and less than or equal to V2, the control adjustment unit generates a corresponding third opening time length adjustment instruction, and then controls the corresponding breed classification gate to extend 40% on the basis of the original preset breed gate opening time length or generates a corresponding fourth opening time length adjustment instruction, and then controls the corresponding weight classification gate to extend 42% on the basis of the original preset weight gate opening time length; if V is greater than V2, the control adjustment unit generates a corresponding fifth opening time length adjustment instruction, and then controls the corresponding breed classification gate to extend 60% on the basis of the original preset breed gate opening time length or generates a corresponding sixth opening time length adjustment instruction, and then controls the corresponding weight classification gate to extend 64% on the basis of the original preset weight gate opening time length. It can be understood that the extension range of the preset breed gate opening time length and the preset weight gate opening time length can also be set to other required values, for example, when V is greater than V2, it can also be extended by 62% on the basis of the original preset breed gate opening time length or by 65% on the basis of the original preset weight gate opening time length. The opening time length of the corresponding gate is dynamically adjusted through the comparison of the passing speed and the preset passing speed.

[0106] In the embodiment, if the passing speed M is greater than the preset passing speed M0, it indicates that the current sheep can pass through the current breed classification gate within the preset breed gate opening time length or pass through the current weight classification gate within the preset weight gate opening time length, so the opening time length of the corresponding gate does not need to be adjusted.

[0107] Specifically, after the preset breed gate opening time length or the preset weight gate opening time length is extended based on the speed difference value, a feedback adjustment step is further included, the subsequent passing speed of the sheep after passing through the corresponding gate is continuously monitored, if the subsequent passing speed is still less than or equal to the preset passing speed, the opening time length of the gate is re-adjusted based on the comparison result of the sheep density in the current corresponding channel and the sheep density threshold value; wherein, if the sheep density is greater than the sheep density threshold value, the preset breed gate opening time length or the preset weight gate opening time length is further extended based on the density difference value; if the sheep density is less than or equal to the sheep density threshold value, a second level fault signal is generated and a gate mechanical inspection alarm is triggered; the density difference value is the difference between the sheep density and the sheep density threshold value.

[0108] In the present embodiment, the subsequent passing speed of the sheep after passing through the corresponding gate is continuously monitored. If the subsequent passing speed is still less than or equal to the preset passing speed M0, it is determined that the current sheep is still relatively slow, which may be due to the fact that the front passage is too crowded. The system performs density monitoring on the sheep in the corresponding passage to obtain the sheep density P, and sets a sheep density threshold P0 corresponding to the sheep density P. For example, P0 = 1.5 square meters / sheep. The comparison result between P and P0 is as follows:

[0109] If P is less than or equal to P0, it indicates that there is no congestion problem in the current corresponding passage, i.e., the density is normal but the sheep walks slowly. It is determined that the sheep itself is abnormal, for example, it is sick and unwilling to move, and manual intervention is required. If P is greater than P0, it indicates that there is a congestion problem in the current corresponding passage, which will cause the time length of the sheep passing through the corresponding gate to increase. At this time, the start time length of the corresponding gate needs to be extended again.

[0110] The difference between the sheep density P and the sheep density threshold P0 is calculated to obtain the density difference T. A preset density difference T0 corresponding to the density difference T is set. In order to more accurately determine the extension range of the preset breed gate opening time length or the preset body weight gate opening time length, the preset density difference T0 can be divided into a first preset density difference T1 and a second preset density difference T2. For example, T1 = 0.3 square meters / sheep and T2 = 0.6 square meters / sheep. The comparison result between T and T1 and T2 is as follows:

[0111] If T is less than or equal to T1, the control adjustment unit generates a corresponding seventh opening time length adjustment instruction, and then controls the corresponding breed separation gate to be extended by 30% on the basis of the original extension based on the instruction, or generates a corresponding eighth opening time length adjustment instruction, and then controls the corresponding body weight separation gate to be extended by 35% on the basis of the original extension based on the instruction. If T is greater than T1 and less than or equal to T2, the control adjustment unit generates a corresponding ninth opening time length adjustment instruction, and then controls the corresponding breed separation gate to be extended by 40% on the basis of the original extension based on the instruction, or generates a corresponding tenth opening time length adjustment instruction, and then controls the corresponding body weight separation gate to be extended by 45% on the basis of the original extension based on the instruction. If T is greater than T2, the control adjustment unit generates a corresponding eleventh opening time length adjustment instruction, and then controls the corresponding breed separation gate to be extended by 50% on the basis of the original extension based on the instruction, or generates a corresponding twelfth opening time length adjustment instruction, and then controls the corresponding body weight separation gate to be extended by 55% on the basis of the original extension based on the instruction.

[0112] Specifically, a central processing unit connected with the first RFID reader and the second RFID reader is arranged, and the central processing unit is connected with the breed classification gates and the weight classification gates; the preset compound grouping strategy is configured in the central processing unit, wherein the preset compound grouping strategy includes the high-quality breed information and the high-quality weight information; the central processing unit matches the breed information or the weight information with any one of the high-quality breed information and the high-quality weight information to control the high-quality classification gate of the breed classification gate or the weight classification gate to open or close, so as to guide the sheep to the high-quality sheep house.

[0113] In the embodiment, the opening of the breed classification gate controlled based on the breed information and the weight classification gate controlled based on the weight information are coupled and associated. The breed information and the weight information are collected by the central processing unit and matched with the high-quality breed information and the high-quality weight information in the preset compound grouping strategy; if the breed information of the sheep entering the primary grouping channel corresponds to the high-quality breed information, the high-quality classification gate of the breed classification gate in the primary grouping channel is directly controlled to open, so as to guide the sheep to the high-quality sheep house; if the weight information of the sheep entering the secondary grouping channel corresponds to the high-quality weight information, the high-quality classification gate of the weight classification gate in the secondary grouping channel is directly controlled to open, so as to guide the sheep to the high-quality sheep house.

[0114] For example, when the central processing unit monitors that the sheep is a Suffolk sheep, the high-quality classification gate in the primary grouping channel is directly controlled to open; when the central processing unit monitors that the weight of the sheep is greater than the high-quality weight, the high-quality classification gate in the secondary grouping channel is directly controlled to open, so as to guide the Suffolk sheep and the sheep with the high-quality weight to the high-quality sheep house for special care, wherein the high-quality weight can be set to 100 kg.

[0115] Specifically, the weighing device for weighing each sheep is arranged at the entrance of the primary grouping channel, the first RFID reader is connected with the weighing device and writes the weight information of each sheep after weighing into the RFID electronic ear tag of the corresponding sheep, so as to update the weight information.

[0116] In the embodiment, the weighing device can be a weighing platform, the weight data is transmitted to the central processing unit by the weighing sensor in the weighing device, and the latest weight data is written into the RFID electronic ear tag on the corresponding sheep by the first RFID reader connected with the central processing unit, so that the data in the ear tag is always the latest and most accurate.

[0117] It can be understood that any one of the preset parameters or critical parameters in the embodiments of the present application is not specifically limited, and the above values are not limited thereto. A person skilled in the art can adjust the preset parameters or critical parameters according to actual needs or analysis of historical data or equipment usage.

[0118] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but a person skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. A person skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

[0119] The above description is only the preferred embodiments of the present application and is not used to limit the present application; for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for controlling sheep flocking based on RFID identification, characterized in that, The method comprises the steps of: wearing an RFID electronic ear tag for each sheep, wherein the electronic ear tag stores the unique ID, breed information and weight information of each sheep; setting a first group channel and a second group channel, and sequentially driving each sheep into the first group channel and the second group channel to identify the sheep according to the preset column rules corresponding to each channel, and obtaining the corresponding sheep column information through a plurality of RFID readers arranged in the column channel, wherein the first group channel is provided with a preset breed column rule according to the breed information, and the second group channel is provided with a preset weight column rule according to the weight information; real-time monitoring the signal strength corresponding to the first RFID reader in the first group channel and the second RFID reader in the second group channel when reading information, and real-time monitoring the corresponding passing speed of the sheep when passing through the breed column gate and the weight column gate; based on the comparison result of the signal strength and the signal strength threshold value, the transmission power feedback adjustment is carried out, and based on the signal strength change after the transmission power feedback adjustment and the comparison result of the passing speed and the preset passing speed, the opening time length feedback adjustment of the corresponding gate is carried out; after completing the corresponding gate opening time length feedback adjustment, the corresponding gate opening time length feedback adjustment is carried out again based on the comparison result of the sheep density and the sheep density threshold value.

2. The RFID identification-based flocking control method according to claim 1, characterized in that, The process of column identification comprises: when the sheep enters the first group channel, the first RFID reader attempts to read the information in the RFID electronic ear tag worn by the sheep, and if the reading fails, a first feedback adjustment of transmission power feedback adjustment is triggered; when the sheep enters the second group channel, the second RFID reader attempts to read the information in the RFID electronic ear tag worn by the sheep, and if the reading fails, a second feedback adjustment of transmission power feedback adjustment is triggered.

3. The RFID identification-based sheep grouping control method according to claim 2, characterized in that, The process of triggering the first feedback adjustment comprises: based on the comparison result that the first signal strength corresponding to the first RFID reader is less than or equal to the first signal strength threshold value, the transmission power of the first RFID reader is adjusted, wherein the transmission power of the first RFID reader is increased based on the signal strength difference value, wherein the signal strength difference value is the difference between the first signal strength threshold value and the first signal strength; The process of triggering the second feedback adjustment comprises: based on the comparison result that the second signal strength corresponding to the second RFID reader is less than or equal to the second signal strength threshold value, the transmission power of the second RFID reader is adjusted, wherein the transmission power of the second RFID reader is increased based on the signal strength offset value, wherein the signal strength offset value is the difference between the second signal strength threshold value and the second signal strength.

4. The RFID identification-based sheep grouping control method according to claim 3, characterized in that, The process of increasing the transmission power of the first RFID reader based on the signal strength difference value comprises: based on the comparison result of the signal strength difference value and the preset signal strength difference value, the transmission power of the first RFID reader is increased, wherein the increase amplitude of the transmission power of the first RFID reader corresponding to the signal strength difference value is in a positive correlation relationship; The process of increasing the transmission power of the second RFID reader based on the signal strength offset value comprises: The process of increasing the transmission power of the second RFID reader based on the signal strength offset value comprises:

5. The RFID identification-based sheep grouping control method according to claim 3, characterized in that, After the transmission power of the first RFID reader is increased based on the signal strength difference value, the process further comprises: During the first adjustment waiting period, the adjusted first signal strength is continuously monitored, If the first signal strength continuously remains less than or equal to the first signal strength threshold, a first-level fault signal is generated and an alarm is triggered, and at the same time, all breed section gates in the first-level grouping channel are opened to a first preset safe opening duration to guide the sheep to pass through to the emergency area; After the transmission power of the second RFID reader is increased based on the signal strength offset value, the process further comprises: During the second adjustment waiting period, the adjusted second signal strength is continuously monitored, If the second signal strength continuously remains less than or equal to the second signal strength threshold, a second-level fault signal is generated and an alarm is triggered, and at the same time, all weight section gates in the second-level grouping channel are opened to a second preset safe opening duration to guide the sheep to pass through to the emergency area.

6. The RFID identification-based sheep grouping control method according to claim 3, characterized in that, When the gate opening duration feedback adjustment is performed on the breed section gate, after the transmission power of the first RFID reader is increased, the first signal strength is re-monitored within a preset duration to obtain a first signal strength average, and based on the comparison result that the first signal strength average is greater than the first signal strength threshold, an instruction is generated to set the opening duration of the corresponding breed section gate to a preset breed gate opening duration; When the gate opening duration feedback adjustment is performed on the weight section gate, after the transmission power of the second RFID reader is increased, the second signal strength is re-monitored within a preset duration to obtain a second signal strength average, and based on the comparison result that the second signal strength average is greater than the second signal strength threshold, an instruction is generated to set the opening duration of the corresponding weight section gate to a preset weight gate opening duration.

7. The RFID identification-based sheep grouping control method according to claim 6, characterized in that, After the preset breed gate opening duration is determined, the preset breed gate opening duration is adjusted based on the comparison result of the passing speed and the preset passing speed; After the preset weight gate opening duration is determined, the preset weight gate opening duration is adjusted based on the comparison result of the passing speed and the preset passing speed; If the passing speed is less than or equal to the preset passing speed, the preset breed gate opening duration or the preset weight gate opening duration is extended based on the comparison result of the speed difference value and a preset speed difference value, wherein the extension amplitude of the preset breed gate opening duration and the preset weight gate opening duration is positively correlated with the speed difference value. The speed difference value is the difference between the preset passing speed and the passing speed. 8.The RFID identification-based sheep flocking control method according to claim 7, characterized in that, after the preset breed gate opening duration or the preset weight gate opening duration is prolonged based on the speed difference value, further comprising, continuously monitoring the subsequent passing speed of the sheep after passing through the corresponding gate, if the subsequent passing speed is still less than or equal to the preset passing speed, re-adjusting the opening duration of the corresponding gate based on the comparison result of the sheep density in the current corresponding channel and the sheep density threshold value; wherein, if the sheep density is greater than the sheep density threshold value, the preset breed gate opening duration or the preset weight gate opening duration is again prolonged based on the density difference value; wherein, the density difference value is the difference between the sheep density and the sheep density threshold value.

9. The RFID identification-based sheep grouping control method according to claim 1, characterized in that, Further comprising, a weighing device is arranged at the entrance of the primary grouping channel to weigh each sheep, the first RFID reader is connected with the weighing device and writes the weight information of each sheep after weighing into the RFID electronic ear tag corresponding to the sheep to update the weight information.

10. A RFID identification based flocking control system for the RFID identification based flocking control method of any one of claims 1-9, characterized in that, Comprise: RFID electronic ear tag, worn on each sheep, which stores the unique ID, breed information and weight information of each sheep; a primary grouping channel provided with a first RFID reader and a plurality of breed compartment gates connected with the first RFID reader, the first RFID reader is used to read the breed information in the RFID electronic ear tag corresponding to the sheep passing through the primary grouping channel, and send the read breed information as a control signal to the corresponding breed compartment gate to control its opening and closing; a plurality of secondary grouping channels, the entrances of the plurality of secondary grouping channels are in communication with the plurality of breed compartment gates one by one; the secondary grouping channel is provided with a second RFID reader and a plurality of weight compartment gates connected with the second RFID reader, the second RFID reader is used to read the weight information in the RFID electronic ear tag corresponding to the sheep passing through the secondary grouping channel, and send the read weight information as a control signal to the corresponding weight compartment gate to control its opening and closing; a monitoring unit comprising a signal monitoring module and a passing speed monitoring module, the signal monitoring module is used to monitor the signal strength of the first RFID reader and the second RFID reader when reading information respectively in real time, and the passing speed monitoring module is used to monitor the passing speed of the sheep when passing through the breed compartment gate and the weight compartment gate in real time; a control and adjustment unit connected with the monitoring unit, the first RFID reader, the second RFID reader, the breed compartment gate and the weight compartment gate respectively, used to generate a transmission power adjustment instruction based on the comparison result of the signal strength and the signal strength threshold value and send it to the corresponding first RFID reader or second RFID reader, and generate a gate opening duration adjustment instruction based on the signal strength change after transmission power feedback adjustment and the comparison result of the passing speed and the preset passing speed and send it to the corresponding breed compartment gate or weight compartment gate; The control adjustment unit is further configured to generate a gate opening duration adjustment instruction again based on a comparison result of the sheep density obtained by the monitoring unit and a sheep density threshold value, and send the gate opening duration adjustment instruction to the corresponding breed separation gate or the weight separation gate.

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