Crop protection methods and systems based on bird-detecting radar

Abstract

The present invention relates to the field of wireless detection technology of bird detecting radars, and specifically discloses a crop protection method and system based on bird detecting radars. The method comprises: bird detecting radar operation detection, bird activity detection in a target crop area, bird expulsion evaluation and bird detecting radar bird expulsion optimization. By detecting and acquiring operation data of the bird detecting radar, the working state and performance of the bird detecting radar can be detected, and it can be verified whether the bird detecting radar meets the performance requirements of the target crop area. By real-time detection and acquisition of bird activity data in the target crop area, the potential threat that bird activities may cause to crops can be quantitatively evaluated, and birds in the target crop area can be expelled to reduce the damage to crops by birds. By analyzing the data in the expulsion process, possible problems and deficiencies in the expulsion measures can be discovered in time, providing a basis for optimizing the bird expulsion method of the bird detecting radar and ensuring the effectiveness of crop protection.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless detection of bird detecting radars, and in particular to a crop protection method and system based on bird detecting radars. Background Art

[0002] At present, with the increasing demand for efficient protection technology in agricultural production, crop protection methods based on bird-detecting radar have gradually become an important innovative technology. Through the application of bird-detecting radar technology, the protection of crops can achieve all-weather and all-round monitoring and protection.

[0003] For example, the invention patent with publication number CN118348499A discloses a method for identifying bird targets in a bird detecting radar system, including step one, using a bird detecting radar system to detect targets within an airspace range; step two, comparing and analyzing the detection data of the bird detecting radar with the characteristic information of various birds in a bird characteristic database through a bird target characteristic information comparison algorithm; step three, outputting the bird species information of the bird detecting radar detection data according to the result of the bird target characteristic information comparison algorithm, completing the output of the bird species information of the bird detecting radar detection target data, and providing reliable information guarantee for the subsequent expulsion linkage of the bird detecting radar.

[0004] For example, the invention patent with publication number CN118519142A discloses a split microwave radar detection method and system for a bird repellent device, which relates to the field of bird repellent technology and aims to reduce the repeatability of data detected by the split radar, including setting up a split microwave radar for detection, the split microwave radar includes N microwave radars, the microwave radars are evenly distributed along the circumference, and the starting limit of the current detection range of the first microwave radar is defined as the 0 degree position of the global azimuth; synchronously collect the detection data of each microwave radar at the current moment, the detection data includes target parameters of multiple detection targets, and the target parameters include radial distance and global azimuth; perform redundant filtering on the detection data to obtain final obstacle data; predict the future trajectory based on the current moving trajectory; and perform collision prediction based on the future trajectory and obstacle data.

[0005] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems:

[0006] The existing radar bird-repelling protection method mainly drives away birds directly through radar to achieve the protection of the target area. However, the radar detection data based on the bird-repelling protection will reduce the radar detection accuracy due to the performance degradation of the radar during work, thereby increasing the risk of false alarms or missed alarms of birds, resulting in untimely or inaccurate bird repelling, which directly affects the protection effect of the target area. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a crop protection method and system based on bird detection radar, which can effectively solve the problems involved in the above-mentioned background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: The first aspect of the present invention provides a crop protection method based on bird detecting radar, including: S1. Bird detecting radar operation detection: detect and obtain the operation data of the bird detecting radar, analyze it, obtain the bird detecting radar operation stability index, and compare it with the bird detecting radar operation stability index threshold preset in the bird detecting radar library. If the bird detecting radar operation stability index is greater than or equal to the bird detecting radar operation stability index threshold preset in the bird detecting radar library, the bird detecting radar is used to detect bird activities in the target crop area. Conversely, if the bird detecting radar operation stability index is less than the bird detecting radar operation stability index threshold preset in the bird detecting radar library, an early warning prompt is given for the operation status of the bird detecting radar.

[0009] S2. Detection of bird activity in target crop areas: Real-time detection and acquisition of bird activity data in target crop areas, and analysis to obtain the potential impact index of bird activity, which is compared with the preset limit value of the potential impact index of bird activity in the bird detection radar library. If the potential impact index of bird activity is greater than or equal to the preset limit value of the potential impact index of bird activity, the birds in the target crop area are driven away.

[0010] S3. Bird repelling assessment: Obtain data during the process of repelling birds from the target crop area and data on bird activity in the target crop area after the birds are repelled from the target crop area, and conduct a comprehensive analysis to obtain the bird detection radar repelling index.

[0011] S4. Bird-detecting radar bird-repelling optimization: compare the bird-detecting radar repelling index with the bird-detecting radar repelling index threshold preset in the bird-detecting radar library. If the bird-detecting radar repelling index is less than the preset bird-detecting radar repelling index threshold, the bird-detecting radar bird-repelling method needs to be optimized.

[0012] As a further method, the bird detection radar operation stability index, the specific analysis process is:

[0013] The distance between the center point of the target crop area and the estimated location of the bird detecting radar is obtained and recorded as the actual detection distance of the bird detecting radar.

[0014] The actual detection distance of the bird detecting radar is matched with the reference scattering cross-sectional area corresponding to the actual detection distance interval of each bird detecting radar preset in the bird detecting radar library to obtain the reference scattering cross-sectional area corresponding to the actual detection distance of the bird detecting radar.

[0015] The detection distance of the bird detecting radar during the operation detection cycle is ratio processed with the actual detection distance of the bird detecting radar to obtain the detection distance efficiency ratio of the bird detecting radar.

[0016] The average scattering cross-sectional area of ​​the bird detecting radar during the operation detection period is ratio-processed with the reference scattering cross-sectional area corresponding to the actual detection distance of the bird detecting radar to obtain the scattering cross-sectional area efficiency ratio of the bird detecting radar.

[0017] The detection distance efficiency ratio, scattering cross-sectional area efficiency ratio, detection speed of the bird detecting radar during the operation detection cycle and the maximum instantaneous signal bandwidth are comprehensively analyzed to obtain the operation stability index of the bird detecting radar.

[0018] As a further method, the potential impact index of bird activities, the specific analysis process is as follows:

[0019] The distances between each bird and the center point of the target crop area are arranged in order from small to large, and the distance ranked first is obtained, which is recorded as the minimum distance between the bird and the center point of the target crop area.

[0020] Obtain the detection distance efficiency ratio, scattering cross-sectional area efficiency ratio, detection speed and maximum instantaneous signal bandwidth of the bird detection radar at the current detection time point.

[0021] The detection distance efficiency ratio, scattering cross-sectional area efficiency ratio, detection speed and maximum instantaneous signal bandwidth of the bird detecting radar at the current detection time point are comprehensively analyzed to obtain the operation stability index of the bird detecting radar at the current detection time point.

[0022] The potential impact index of bird activity is obtained by comprehensively analyzing the bird detection radar operation stability index at the current detection time point, the number of birds in the target crop area at the current detection time point, the slowest bird flight speed, the lowest bird flight altitude, the maximum bird sound intensity and the minimum distance between the bird and the center point of the target crop area.

[0023] As a further method, the birds are driven away from the target crop area. The specific driving process is to start the high-energy sound wave bird driving device by issuing a bird driving command through a bird detection radar, and drive away the birds from the target crop area by the default high-frequency sound wave intensity of the high-energy sound wave bird driving device.

[0024] As a further method, the bird detection radar repelling index, the specific analysis process is:

[0025] The duration of high-frequency sound waves in the target crop area during the bird expulsion process, the maximum intensity of high-frequency sound waves, the damaged area of ​​target crops, the number of birds remaining in the target crop area after expulsion, the slowest flight speed of birds, and the minimum distance between birds and the center point of the target crop area are comprehensively analyzed to obtain the bird detection radar expulsion index. The specific analysis method is as follows:

[0026]

[0027] In the formula, is the bird radar driving away index, e is a natural constant, The duration of high-frequency sound waves in the target crop area during the bird-repelling process. The impact factor corresponding to the duration of high-frequency sound waves preset in the bird detection radar library, The maximum intensity of high-frequency sound waves in the target crop area during the bird-repelling process. The influence factor corresponding to the maximum intensity of high-frequency sound waves preset in the bird-detecting radar library. The target crop area damaged during the bird removal process is the target crop area. The impact factor corresponding to the target crop damage area preset in the bird detection radar library, is the number of birds remaining in the target crop area after the expulsion, The remaining number of birds allowed for the bird radar library is preset. The slowest flying speed of birds in the target crop area after being driven away. Bird flight allowable speed preset for bird radar library, is the minimum distance between the target crop area and the center point of the target crop area after the birds are driven away. The preset distance limit value between the bird and the center point of the target crop area for the bird detection radar library.

[0028] As a further method, the bird-repelling mode of the bird-detecting radar is optimized. The specific optimization process can be to update the maximum intensity of the high-frequency sound wave to the maximum sound intensity of the bird detected, update the preset allowable bird flight speed to the slowest bird flight speed detected, and update the preset bird flight reference altitude to the lowest bird flight altitude, while increasing the duration of the high-frequency sound wave.

[0029] The second aspect of the present invention provides a system for a crop protection method based on bird detecting radar, including: a bird detecting radar operation detection module, which is used to detect and obtain the operation data of the bird detecting radar, analyze it, obtain the bird detecting radar operation stability index, and compare it with the bird detecting radar operation stability index threshold preset in the bird detecting radar library. If the bird detecting radar operation stability index is greater than or equal to the bird detecting radar operation stability index threshold preset in the bird detecting radar library, bird activity detection is performed on the target crop area through the bird detecting radar. Conversely, if the bird detecting radar operation stability index is less than the bird detecting radar operation stability index threshold preset in the bird detecting radar library, an early warning prompt is given for the operation status of the bird detecting radar.

[0030] The bird activity detection module in the target crop area is used to detect and obtain bird activity data in the target crop area in real time, and analyze the potential impact index of the bird activity, and compare it with the potential impact index limit value of the bird activity preset in the bird detection radar library. If the potential impact index of the bird activity is greater than or equal to the preset potential impact index limit value of the bird activity, the birds in the target crop area will be driven away.

[0031] The bird driving away evaluation module is used to obtain data during the process of driving away birds from the target crop area and the bird activity data in the target crop area after the birds are driven away from the target crop area, and comprehensively analyze to obtain the bird detection radar driving away index.

[0032] The bird-detecting radar bird-repelling optimization module is used to compare the bird-detecting radar repelling index with the bird-detecting radar repelling index threshold preset in the bird-detecting radar library. If the bird-detecting radar repelling index is less than the preset bird-detecting radar repelling index threshold, the bird-detecting radar's bird-repelling method needs to be optimized.

[0033] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0034] (1) The present invention can detect the working status and performance of the bird detecting radar by detecting and acquiring the operating data of the bird detecting radar, analyze and obtain the operating stability index of the bird detecting radar, and compare it with the bird detecting radar operating stability index threshold preset in the bird detecting radar library to verify whether the bird detecting radar meets the performance requirements of the target crop area. If the index is greater than or equal to the threshold, it indicates that the radar is in a reliable working state and can accurately detect bird activities. On the contrary, if the index is less than the threshold, it can give an early warning and trigger preventive maintenance measures, which helps to avoid radar failure during the critical period of crop protection and affect the protection effect on crops.

[0035] (2) The present invention can detect and track bird activity in the target crop area in real time and provide accurate information support for subsequent crop protection. By analyzing these data to obtain the potential impact index of bird activity, the potential threat that bird activity may cause to crops can be quantitatively evaluated. If the potential impact index of bird activity is greater than or equal to the preset potential impact index limit value of bird activity, the birds in the target crop area are driven away, which can effectively reduce the damage to crops caused by birds and improve the protection of crops.

[0036] (3) The present invention obtains data during the process of driving away birds from the target crop area and data on bird activities in the target crop area after the birds are driven away from the target crop area. These data reflect the effectiveness of the bird driving away measures and the changes in bird activities. By analyzing these data to obtain the bird detection radar driving away index, the effectiveness and efficiency of the bird driving away measures can be quantitatively evaluated, providing a basis for the subsequent optimization of the bird driving away strategy and the improvement of the effect of bird driving away.

[0037] (4) The present invention can timely discover possible problems and deficiencies in the repelling measures by comparing the bird detecting radar repelling index with the bird detecting radar repelling index threshold preset in the bird detecting radar library. If the bird detecting radar repelling index is less than the preset bird detecting radar repelling index threshold, it is necessary to optimize the bird repelling method of the bird detecting radar. This measure can further improve the repelling effect and ensure the effectiveness of crop protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0039] Figure 1 The figure is a schematic flow chart of the method steps of the present invention.

[0040] Figure 2 It is a schematic diagram of system module connection of the present invention. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] Reference Figure 1As shown, the first aspect of the present invention provides a crop protection method based on bird detecting radar, including: S1. Bird detecting radar operation detection: detect and obtain the operation data of the bird detecting radar, analyze it, obtain the bird detecting radar operation stability index, and compare it with the bird detecting radar operation stability index threshold preset in the bird detecting radar library. If the bird detecting radar operation stability index is greater than or equal to the bird detecting radar operation stability index threshold preset in the bird detecting radar library, the bird detecting radar is used to detect bird activities in the target crop area. Conversely, if the bird detecting radar operation stability index is less than the bird detecting radar operation stability index threshold preset in the bird detecting radar library, an early warning prompt is given for the operation status of the bird detecting radar.

[0043] S2. Detection of bird activity in target crop areas: Real-time detection and acquisition of bird activity data in target crop areas, and analysis to obtain the potential impact index of bird activity, which is compared with the preset limit value of the potential impact index of bird activity in the bird detection radar library. If the potential impact index of bird activity is greater than or equal to the preset limit value of the potential impact index of bird activity, the birds in the target crop area are driven away.

[0044] S3. Bird repelling assessment: Obtain data during the process of repelling birds from the target crop area and data on bird activity in the target crop area after the birds are repelled from the target crop area, and conduct a comprehensive analysis to obtain the bird detection radar repelling index.

[0045] S4. Bird-detecting radar bird-repelling optimization: compare the bird-detecting radar repelling index with the bird-detecting radar repelling index threshold preset in the bird-detecting radar library. If the bird-detecting radar repelling index is less than the preset bird-detecting radar repelling index threshold, the bird-detecting radar bird-repelling method needs to be optimized.

[0046] Specifically, the operating data of the bird detecting radar includes the detection speed, detection distance, average scattering cross-sectional area and maximum instantaneous signal bandwidth of the bird detecting radar during the operation detection cycle.

[0047] It should be explained that the detection speed of the above-mentioned bird-detecting radar during the operation detection cycle is to test the detection performance of the radar by setting simulated targets in the bird-detecting radar. Usually, these simulated targets can be objects with known speed, distance and direction, which are used to simulate the flight state of birds. The detection speed of the radar can be obtained by detecting the simulated targets by the radar; the detection distance is determined by the emission, reflection and reception process of the detection beam by the bird-detecting radar; the average scattering cross-sectional area is determined by measuring the energy of the bird-detecting radar wave returned from the target detection area to determine the size of the detection target, and the size of this target is the radar scattering cross-sectional area; the maximum instantaneous signal bandwidth is to send electromagnetic waves to the target area through the transmitting antenna and receive the reflected echo signal. The echo signal contains information such as the distance, speed and shape of the target, and the echo signal is Fourier transformed and spectrally analyzed. The echo signal is Fourier transformed to obtain the result of the Fourier transform. According to the result of the Fourier transform, the instantaneous bandwidth of the signal can be obtained. In this embodiment, the operation detection cycle refers to the time period during which the bird-detecting radar performs continuous and periodic detection in the process of detecting the stability of the operation of the bird-detecting radar. This cycle is usually randomly set according to the actual needs of the crop area and the performance of the radar.

[0048] In this embodiment, there is a certain relationship between the detection speed, detection distance, average scattering cross-sectional area and maximum instantaneous signal bandwidth of the bird detection radar during the operation detection cycle. The detection speed reflects the real-time tracking capability of the radar for birds in the air, and the detection distance determines the monitoring range that the radar can cover. The two together determine the radar's monitoring efficiency and accuracy for bird activities. In practical applications, a faster detection speed helps the radar respond to changes in aerial targets more quickly, while a longer detection distance enables the radar to cover a wider area, thereby improving the comprehensiveness of detection. The detection distance is closely related to the average scattering cross-sectional area value. A larger average scattering cross-sectional area value means that birds are more easily detected under radar scanning, thereby increasing the detection distance of the radar. There is a close relationship between the detection distance and the maximum instantaneous signal bandwidth. The instantaneous signal bandwidth refers to the frequency variation range of the echo signal received by the radar, which reflects the Doppler frequency shift caused by the target movement. The longer the detection distance, the weaker the echo signal received by the radar. In order to maintain a sufficient signal-to-noise ratio to accurately measure the target speed, the radar may need to increase the transmission power. At the same time, the size of the instantaneous signal bandwidth will also affect the radar's measurement accuracy of the target speed. A larger instantaneous bandwidth usually means a higher speed measurement accuracy.

[0049] Specifically, the bird-detecting radar operation stability index has the following specific analysis process:

[0050] The distance between the center point of the target crop area and the estimated location of the bird detecting radar is obtained and recorded as the actual detection distance of the bird detecting radar.

[0051] It should be explained that the center point of the above-mentioned target crop area is obtained by obtaining remote sensing image data of the target crop area through a drone. The target crop area in the remote sensing image is separated from the background through image segmentation technology, and the center point of the target crop area is obtained by analyzing the centroid method. The centroid method determines the position of the center point by calculating the average coordinate of all pixel points in the crop area. Specifically, the x-coordinate and y-coordinate of each pixel in the target crop area are summed respectively, and then divided by the total number of pixels to obtain the centroid coordinates in the remote sensing image. The coordinates corresponding to the centroid coordinates in the remote sensing image in the target crop area are the center points of the target crop area. The center point of the target crop area and the expected location for installing the bird detecting radar refer to the best location for installing the bird detecting radar based on the location of the crop area. The target crop area can be spatially analyzed through the geographic information system (GIS) to determine the best location for installing the bird detecting radar. The distance between the center point of the target crop area and the expected location for installing the bird detecting radar is determined by combining remote sensing images with field data using geographic information system (GIS) software. The center point coordinates and radar location coordinates are entered into the GIS software, from which the distance between the two points can be obtained, which is the distance between the center point of the target crop area and the expected location for installing the bird detecting radar.

[0052] The actual detection distance of the bird detecting radar is matched with the reference scattering cross-sectional area corresponding to the actual detection distance interval of each bird detecting radar preset in the bird detecting radar library to obtain the reference scattering cross-sectional area corresponding to the actual detection distance of the bird detecting radar.

[0053] It should be explained that the above matching of the actual detection distance of the bird detecting radar with the reference scattering cross-sectional area corresponding to the actual detection distance interval of each bird detecting radar preset in the bird detecting radar library is performed in the following specific matching process:

[0054] The actual detection distance of the bird detecting radar is matched with the reference scattering cross-sectional area corresponding to the actual detection distance interval of each bird detecting radar preset in the bird detecting radar library, thereby obtaining the reference scattering cross-sectional area corresponding to the actual detection distance of the bird detecting radar.

[0055] In a specific embodiment, the actual detection distance of the bird detecting radar is 15 kilometers, and the actual detection distance interval of each bird detecting radar stored in the bird detecting radar library is [12, 21). Then the actual detection distance interval of the bird detecting radar is [12, 21) and the corresponding reference scattering cross-sectional area is 0.1 square meters.

[0056] The detection distance of the bird detecting radar during the operation detection cycle is ratio processed with the actual detection distance of the bird detecting radar to obtain the detection distance efficiency ratio of the bird detecting radar.

[0057] The average scattering cross-sectional area of ​​the bird detecting radar during the operation detection period is ratio-processed with the reference scattering cross-sectional area corresponding to the actual detection distance of the bird detecting radar to obtain the scattering cross-sectional area efficiency ratio of the bird detecting radar.

[0058] The detection distance efficiency ratio, scattering cross-sectional area efficiency ratio, detection speed of the bird detecting radar during the operation detection cycle and the maximum instantaneous signal bandwidth are comprehensively analyzed to obtain the operation stability index of the bird detecting radar. The specific analysis method is as follows:

[0059]

[0060] In the formula, is the operating stability index of the bird-detecting radar, and e is a natural constant.

[0061] It is the detection distance efficiency ratio of the bird detecting radar, which refers to the ratio of the detection distance of the bird detecting radar during the running detection cycle to the actual detection distance of the bird detecting radar.

[0062] The influence factor corresponding to the unit value of the detection distance efficiency ratio is preset for the bird detecting radar library. The influence factor corresponding to the unit value of the detection distance efficiency ratio can be directly obtained from the bird detecting radar library, and the corresponding relationship can be a preset mapping relationship. For example, a mapping set is formed according to the historical detection distance efficiency ratio and the influence factor corresponding to the unit value of the detection distance efficiency ratio, and the real-time detection distance efficiency ratio is input into the mapping set to obtain the influence factor corresponding to the unit value of the detection distance efficiency ratio. The mapping relationship can be one-to-one or many-to-one. At the same time, in this example, its value range is [0, 1].

[0063] It is the scattering cross-sectional area efficiency ratio of the bird detecting radar, which refers to the ratio of the average scattering cross-sectional area of ​​the bird detecting radar during the operating detection cycle to the reference scattering cross-sectional area corresponding to the actual detection distance of the bird detecting radar.

[0064] The influence factor corresponding to the unit value of the scattering cross-sectional efficiency ratio is preset for the bird detecting radar library. The influence factor corresponding to the unit value of the scattering cross-sectional efficiency ratio can be directly obtained from the bird detecting radar library, and the corresponding relationship can be a preset mapping relationship. For example, a mapping set is formed according to the historical scattering cross-sectional efficiency ratio and the influence factor corresponding to the unit value of the scattering cross-sectional efficiency ratio, and the real-time scattering cross-sectional efficiency ratio is input into the mapping set to obtain the influence factor corresponding to the unit value of the scattering cross-sectional efficiency ratio. The mapping relationship can be one-to-one or many-to-one. At the same time, in this example, its value range is [0, 1].

[0065] It is the detection speed of the bird detection radar during the running detection cycle, which refers to the speed measurement value that the radar can achieve when detecting the set simulated target during the detection operation.

[0066] The detection reference speed preset for the bird detection radar library is a standard speed value set for evaluating radar performance.

[0067] It is the maximum instantaneous signal bandwidth of the bird-detecting radar during its operating detection cycle, which refers to the maximum signal bandwidth that can be modulated in a single transmitting pulse during the radar's detection process.

[0068] The transient signal definition bandwidth preset for the bird detection radar library refers to a standard transient signal bandwidth value set for evaluating radar performance.

[0069] In this embodiment, a lower detection distance efficiency ratio of the bird detecting radar will result in the bird detecting radar being unable to accurately identify distant bird targets, which will result in false alarms (misjudging non-bird targets as birds) or missed alarms (failing to detect actual birds) in subsequent actual bird detection; a lower scattering cross-sectional area efficiency ratio of the bird detecting radar will result in inaccurate or incomplete bird data collected by the bird detecting radar in subsequent actual operation; when the detection speed of the bird detecting radar during the operating detection cycle deviates greatly from the detection reference speed preset in the bird detecting radar library, the radar will be unable to respond to changes in bird activities in a timely manner, and the maximum instantaneous signal of the bird detecting radar during the operating detection cycle will be too low. When the bandwidth deviates greatly from the preset instantaneous signal definition bandwidth, the radar will have difficulties in receiving and processing the echo signal, thus affecting the detection accuracy and stability. At the same time, the deviation of the instantaneous signal bandwidth may also affect the radar's anti-interference ability. When the radar signal is subject to external interference, if the instantaneous signal bandwidth is not sufficient to cover the frequency range of the interference signal, the radar may not be able to effectively suppress the interference, resulting in false alarms or missed alarms. Therefore, through a detailed analysis of the parameters in the bird-detecting radar's operating stability indicators, it is possible to ensure the working status and performance of the bird-detecting radar is reliable, avoid radar failures during the critical period of crop protection, and affect the protection effect on crops.

[0070] In this embodiment, the bird detecting radar operation stability index is compared with the bird detecting radar operation stability index threshold preset in the bird detecting radar library. If the bird detecting radar operation stability index is greater than or equal to the bird detecting radar operation stability index threshold preset in the bird detecting radar library, it means that the bird detecting radar is currently in a good operating state, its performance is stable, and it can use the high-precision detection capability of the bird detecting radar to monitor the bird activities in the target area in real time, and install the bird detecting radar at the expected installation location of the bird detecting radar; on the contrary, if the bird detecting radar operation stability index is less than the bird detecting radar operation stability index threshold preset in the bird detecting radar library, it means that the bird detecting radar is currently in a poor operating state, there may be a fault or performance degradation, resulting in it being unable to accurately detect bird activities in the target crop area, then the operating status of the bird detecting radar is warned, and the specific warning prompt can be given by means of a voice broadcast function integrated in the bird detecting radar. The specific broadcast content can be that the scattering cross-sectional area of ​​the current bird detecting radar cannot meet the actual detection distance of the bird detecting radar, please update the bird detecting radar.

[0071] In this embodiment, the above-mentioned operation test of the bird detecting radar is a comprehensive functional test of the bird detecting radar before the bird detecting radar system is installed in the target crop area, to ensure that the bird detecting radar can stably and accurately detect bird activities in subsequent actual bird detecting applications.

[0072] Furthermore, the bird activity data of the target crop area specifically includes the number of birds in the target crop area at the current detection time point, the slowest bird flight speed, the lowest bird flight altitude, the maximum bird sound intensity and the distance between each bird and the center point of the target crop area.

[0073] It should be explained that the number of birds in the above-mentioned target crop area at the current detection time point is detected by bird detecting radar emitting electromagnetic waves and receiving the reflected signals. Bird detecting radar can process multiple reflected signals to distinguish and count individual birds in different positions. Therefore, bird detecting radar can count the number of birds in the target crop area in real time. The slowest flight speed of birds is to use bird detecting radar to emit radio waves of a specific frequency, illuminate the birds flying in the air, receive the reflected echo signals, and measure the radial speed of the birds according to the Doppler effect. The speed information of each bird is extracted from the radar data, and the slowest flying bird is found through maximum value analysis. Bird detecting radar can accurately measure The height of birds relative to the ground is measured, and the lowest flying height of birds can be obtained through extreme value analysis. The maximum sound intensity of birds is obtained by capturing the sounds made by birds in real time through sound sensors. The sound sensors convert sound signals into electrical signals, and the intensity of sound signals is analyzed for extreme values, thereby obtaining the maximum sound intensity of birds. Bird-detecting radar can accurately measure the position of birds relative to the center point of the target crop area. By calculating the straight-line distance between the position of birds and the center point, the distance between each bird and the center point of the target crop area can be obtained. In this embodiment, the current detection time point refers to the specific moment when the bird-detecting radar detects birds in real time, and the current detection time point is continuously changing.

[0074] Specifically, the potential impact index of bird activities is analyzed in the following process:

[0075] The distances between each bird and the center point of the target crop area are arranged in order from small to large, and the distance ranked first is obtained, which is recorded as the minimum distance between the bird and the center point of the target crop area.

[0076] Obtain the detection distance efficiency ratio, scattering cross-sectional area efficiency ratio, detection speed and maximum instantaneous signal bandwidth of the bird detection radar at the current detection time point.

[0077] The detection distance efficiency ratio, scattering cross-sectional area efficiency ratio, detection speed and maximum instantaneous signal bandwidth of the bird detecting radar at the current detection time point are comprehensively analyzed to obtain the operation stability index of the bird detecting radar at the current detection time point.

[0078] It needs to be explained that the detection distance efficiency ratio, scattering cross-sectional efficiency ratio, detection speed and maximum instantaneous signal bandwidth of the bird detecting radar at the current detection time point are the same as the detection distance efficiency ratio, scattering cross-sectional efficiency ratio of the bird detecting radar, the detection speed and maximum instantaneous signal bandwidth of the bird detecting radar during the operation detection cycle. In this embodiment, the specific analysis method of the operation stability index of the bird detecting radar at the current detection time point is the same as the analysis method of the operation stability index of the bird detecting radar.

[0079] In this embodiment, the bird-detecting radar operation stability index at the current detection time point refers to the comprehensive performance of various performance parameters of the radar at a specific time point (such as the current moment), reflecting the specific working state of the radar at that time point, which may be affected by temporary factors (such as minor equipment failures); the bird-detecting radar operation stability index refers to the average level or comprehensive evaluation result of various performance parameters of the radar over a longer period of time (such as an operation detection cycle), which can better represent the overall performance and stability of the radar; although the two differ in time and data representativeness, they are both calculated based on core parameters such as radar detection distance efficiency ratio, scattering cross-sectional area efficiency ratio, detection speed and maximum instantaneous signal bandwidth. Therefore, they are essentially for evaluating the performance and stability of the radar, but with different emphases and application scenarios; the index at the current detection time point can more accurately reflect the actual working state of the radar at that moment, thereby providing more reliable data support for the current bird activity monitoring. If the radar at the current detection time point is unstable, then the information such as the number of birds detected, flight speed, and altitude may be biased, thereby affecting the accuracy of the potential impact index of bird activity.

[0080] The potential impact index of bird activity is obtained by comprehensively analyzing the bird detection radar operation stability index at the current detection time point, the number of birds in the target crop area at the current detection time point, the slowest bird flight speed, the lowest bird flight altitude, the maximum bird sound intensity and the minimum distance between the bird and the center point of the target crop area.

[0081] In this embodiment, there is a close connection between the bird detecting radar operation stability index at the current detection time point, the number of birds in the target crop area at the current detection time point, the slowest bird flight speed, the lowest bird flight altitude, the maximum bird sound intensity, and the minimum distance between the bird and the center point of the target crop area. The higher the bird detecting radar operation stability index at the current detection time point, the more accurately the bird activities can be detected and tracked, and there will be no inaccuracies or omissions in the monitoring of bird activities. The more accurate the number of birds in the target crop area at the current detection time point, the more accurately the current bird activities can be monitored, and the more accurate the maximum sound intensity of the birds obtained by monitoring.

[0082] The potential impact index of bird activities is obtained by the specific analysis method as follows:

[0083]

[0084] In the formula, is the potential impact index of bird activities, e is a natural constant, It is the operating stability index of the bird detecting radar at the current detection time point.

[0085] The weight factor corresponding to the bird detecting radar operation stability index preset for the bird detecting radar library can be directly obtained from the bird detecting radar library, and the corresponding relationship can be a preset mapping relationship. For example, a mapping set is formed according to the historical bird detecting radar operation stability index and the weight factor corresponding to the bird detecting radar operation stability index, and the real-time bird detecting radar operation stability index is input into the mapping set to obtain the weight factor corresponding to the bird detecting radar operation stability index. The mapping relationship can be one-to-one or many-to-one. At the same time, in this example, its value range is [0, 1].

[0086] The number of birds in the target crop area at the current detection time point refers to the total number of birds actually measured in the target crop area at the current detection time point.

[0087] The allowed number of birds preset for the bird detecting radar library refers to the maximum number of birds allowed to appear in the bird detecting radar library.

[0088] It is the slowest flying speed of birds in the target crop area at the current detection time point, which refers to the slowest speed of birds flying in the target crop area detected by bird detection radar.

[0089] The bird flight allowable speed preset for the bird detection radar library refers to the slowest speed allowed for bird flight preset in the bird detection radar library.

[0090] The lowest flight altitude of birds in the target crop area at the current detection time point refers to the lowest flight altitude of birds flying in the target crop area detected by bird detection radar.

[0091] The bird flight reference altitude preset for the bird detecting radar library refers to the lowest bird flight altitude value preset in the bird detecting radar library.

[0092] It is the maximum sound intensity of birds in the target crop area at the current detection time point, which refers to the maximum sound intensity of birds in the target crop area measured by acoustic monitoring.

[0093] The sound intensity threshold preset for the bird detecting radar library refers to a maximum sound intensity value preset in the bird detecting radar library.

[0094] It is the minimum distance between the birds in the target crop area and the center point of the target crop area at the current detection time point, and refers to the minimum straight-line distance between the birds in the target crop area and the target crop area monitored by the bird detection radar.

[0095] The distance limit value between a bird and the center point of a target crop area preset in the bird detection radar library refers to the minimum allowable distance between a bird and the center point of a target crop area preset in the bird detection radar library.

[0096] In this embodiment, a lower bird-detecting radar operation stability index at the current detection time point means that the radar may have a fault or performance degradation, resulting in inaccurate or missing monitoring data of bird activities, which will directly affect the accuracy and reliability of the potential impact index of bird activities; the number of birds at the current detection time point is large, even more than the preset allowed number of birds, and high-density bird activities may increase the risk of damage to crops, thereby increasing the potential impact index of bird activities; the slowest bird flight speed at the current detection time point is slow, even less than the preset allowed bird flight speed, which means that the birds stay in the target crop area for a long time, and a long stay will increase the chance of birds damaging crops; the lowest bird flight altitude at the current detection time point is low, even lower than the preset bird flight reference altitude , which may indicate that birds are more likely to come into contact with crops. Low flight altitude increases the risk of direct damage to crops by birds. The maximum sound intensity of birds at the current detection time point is large, even greater than the preset sound intensity threshold, indicating that bird activities are more frequent or intensive, which will increase the risk of crop damage. The minimum distance between birds and the center point of the target crop area at the current detection time point is small, even less than the preset distance limit between birds and the center point of the target crop area, indicating that birds may have been very close to the crop area. Close distance increases the chance of direct contact between birds and crops, thereby increasing the potential impact index of bird activities. Therefore, through detailed analysis of each parameter in the potential impact index of bird activities, it is possible to timely discover and track bird activities, and provide accurate information support for subsequent crop protection.

[0097] In this embodiment, the potential impact index of bird activity is compared with the preset limit value of the potential impact index of bird activity in the bird detection radar library; if the potential impact index of bird activity is less than the preset limit value of the potential impact index of bird activity, this means that the potential impact of the current frequency, type or behavior pattern of bird activity on the target crop area is at a low level and will not cause significant damage and impact on crops. Therefore, in this case, there is no need to drive away the birds in the target crop area, and it is necessary to continuously monitor and analyze bird activities. Once the potential impact index of bird activity is greater than or equal to the preset limit value of the potential impact index of bird activity, the birds are immediately driven away; if the potential impact index of bird activity is greater than or equal to the preset limit value of the potential impact index of bird activity, it indicates that the current frequency, type or behavior pattern of bird activity may have a significant potential impact on the target crop area, such as pecking, trampling or spreading pests and diseases, etc. These behaviors may lead to a reduction in crop yields. Therefore, in this case, it is necessary to immediately drive away the birds in the target crop area to protect the crops from further damage.

[0098] Specifically, the birds in the target crop area are driven away, and the specific driving process is to start the high-energy sound wave bird driving device by issuing a bird driving command through the bird detection radar, and drive away the birds in the target crop area by the default high-frequency sound wave intensity of the high-energy sound wave bird driving device.

[0099] In this embodiment, the above-mentioned high-energy acoustic wave bird-repelling device and the bird-detecting radar are usually seamlessly integrated through a 5G network. This connection method ensures the real-time and stability of data transmission, so that the bird-repelling device can respond quickly according to the bird target information detected by the radar. The bird-detecting radar can monitor the bird activities in the target crop area in real time. When the potential impact index of bird activities monitored by the bird-detecting radar is greater than or equal to the preset potential impact index limit value of bird activities, the bird-detecting radar will immediately send a bird-repelling instruction to the high-energy acoustic wave bird-repelling device. After receiving the bird-repelling instruction, the high-energy acoustic wave bird-repelling device will start the acoustic wave repelling function according to the preset program to drive away the birds. This real-time monitoring and automatic repelling method greatly improves the efficiency and accuracy of bird repelling.

[0100] Furthermore, the data of the process of driving away birds from the target crop area specifically includes the duration of high-frequency sound waves in the target crop area during the process of driving away birds, the maximum intensity of high-frequency sound waves, and the damaged area of ​​target crops.

[0101] It should be explained that the duration of high-frequency sound waves in the above-mentioned target crop area during the bird repelling process is obtained by continuously recording the actual emission duration of the high-energy sound wave bird repelling equipment during the repelling process, and the maximum intensity of the high-frequency sound waves is obtained by real-time monitoring and recording the maximum intensity of the high-frequency sound waves through the built-in sound wave measurement function of the high-energy sound wave bird repelling equipment during the repelling process. The damaged area of ​​the target crops can be identified through remote sensing technology, thereby obtaining the damaged area of ​​the target crops.

[0102] The target crop area bird activity data after the birds in the target crop area are driven away specifically includes the remaining number of birds in the target crop area after the birds are driven away, the slowest flying speed of the birds, and the minimum distance between the birds and the center point of the target crop area.

[0103] It should be explained that the remaining number of birds in the target crop area after driving them away, the slowest flying speed of birds and the minimum distance between birds and the center point of the target crop area are obtained in the same way as the number of birds in the target crop area at the current detection time point, the slowest flying speed of birds and the minimum distance between birds and the center point of the target crop area.

[0104] In this embodiment, the number of birds in the target crop area at the current detection time point, the slowest bird flight speed and the minimum distance between the birds and the center point of the target crop area are the basic data of bird activity before expulsion, and the remaining number of birds in the target crop area after expulsion, the slowest bird flight speed and the minimum distance between the birds and the center point of the target crop area are the basic data of bird activity after expulsion. By analyzing the data at these two time points, the effect and impact of the expulsion measures can be intuitively seen; the number of birds at the current time point reflects the abundance of birds in the target crop area before expulsion, and the remaining number of birds after expulsion directly reflects the effectiveness of the expulsion measures. If the number of birds after expulsion is significantly reduced, it means that the expulsion effect is good, and the birds at the current time point are The slowest flight speed may reflect the birds' activity habits or comfort level in the area. After expulsion, if the slowest flight speed of the birds increases (i.e., the birds speed up their flight speed to escape), it indicates that the expulsion measures have had a certain expulsion effect on the birds. The minimum distance between the birds and the center point of the target crop area at the current time point may show that the birds are relatively close to the crop area, while the minimum distance between the birds and the center point of the target crop area after expulsion should show that the distance between the birds and the crop area has increased, indicating that the birds have been successfully driven away from the target area. By comparing the number of birds, flight speed and minimum distance to the crop area before and after expulsion, the effect of the expulsion measures can be directly quantified. If these parameters change significantly after expulsion, it means that the expulsion measures are effective.

[0105] Specifically, the bird detection radar repelling index has a specific analysis process as follows:

[0106] The bird-detecting radar repelling index is obtained by comprehensively analyzing the duration of high-frequency sound waves in the target crop area during the bird repelling process, the maximum intensity of high-frequency sound waves, the damaged area of ​​target crops, the remaining number of birds in the target crop area after repelling, the slowest flight speed of birds, and the minimum distance between birds and the center point of the target crop area.

[0107] In this embodiment, the longer the duration of the high-frequency sound waves in the target crop area during the bird expulsion process and the greater the maximum intensity of the high-frequency sound waves, the more significant the interference and expulsion effects on the birds, which directly leads to a decrease in the number of remaining birds in the target crop area after the expulsion, an increase in the slowest flight speed of birds, and an increase in the minimum distance between the birds and the center point of the target crop area, thereby reducing the damaged area of ​​the target crops to a certain extent.

[0108] The specific analysis method of the bird detection radar repelling index is as follows:

[0109]

[0110] In the formula, is the bird-detecting radar repelling index, and e is a natural constant.

[0111] The duration of high-frequency sound waves in the target crop area during the bird repelling process refers to the length of time that the high-frequency sound waves emitted by the high-energy sound wave bird repellent equipment persist in the target crop area when bird repelling measures are taken.

[0112] The impact factor corresponding to the duration of high-frequency sound waves preset in the bird detecting radar library can be directly obtained from the bird detecting radar library, and the corresponding relationship can be a preset mapping relationship. For example, a mapping set is formed according to the historical duration of high-frequency sound waves and the impact factor corresponding to the duration of high-frequency sound waves, and the real-time duration of high-frequency sound waves is input into the mapping set to obtain the impact factor corresponding to the duration of high-frequency sound waves. The mapping relationship can be one-to-one or many-to-one. At the same time, in this example, its value range is [0, 1].

[0113] The maximum intensity of high-frequency sound waves in the target crop area during the bird-repelling process refers to the maximum energy of high-frequency sound waves that can be emitted by the high-energy sound wave bird-repelling equipment during the bird-repelling process.

[0114] The influence factor corresponding to the maximum intensity of high-frequency sound waves is preset for the bird detecting radar library. The influence factor corresponding to the maximum intensity of high-frequency sound waves can be directly obtained from the bird detecting radar library, and the corresponding relationship can be a preset mapping relationship. For example, a mapping set is formed according to the historical maximum intensity of high-frequency sound waves and the influence factor corresponding to the maximum intensity of high-frequency sound waves, and the real-time maximum intensity of high-frequency sound waves is input into the mapping set to obtain the influence factor corresponding to the maximum intensity of high-frequency sound waves. The mapping relationship can be one-to-one or many-to-one. At the same time, in this example, its value range is [0, 1].

[0115] The target crop damage area in the process of bird expulsion refers to the area of ​​crops damaged due to bird activities (such as pecking, trampling, etc.) during the process of bird expulsion.

[0116] The impact factors corresponding to the target crop damaged area are preset in the bird detecting radar library. The impact factors corresponding to the target crop damaged area can be directly obtained from the bird detecting radar library, and the corresponding relationship can be a preset mapping relationship. For example, a mapping set is formed according to the historical target crop damaged area and the impact factors corresponding to the target crop damaged area, and the real-time target crop damaged area is input into the mapping set to obtain the impact factors corresponding to the target crop damaged area. The mapping relationship can be one-to-one or many-to-one. At the same time, in this example, its value range is [0, 1].

[0117] The remaining number of birds in the target crop area after bird expulsion refers to the number of birds that remain in the target crop area after bird expulsion measures are taken.

[0118] The allowable remaining number of birds preset for the bird detecting radar library refers to the threshold preset in the bird detecting radar library, which is used to evaluate the effectiveness of bird repellent measures.

[0119] The slowest flying speed of birds in the target crop area after being driven away refers to the slowest flying speed of birds remaining in the target crop area after the bird driving measures are implemented.

[0120] The permissible bird flight speed preset for the bird detection radar library refers to the slowest bird flight speed after being driven away preset in the bird detection radar library.

[0121] It is the minimum distance between the birds in the target crop area and the center point of the target crop area after the birds are driven away. It refers to the shortest distance between the birds remaining in the target crop area and the center point of the target crop area after the bird driving measures are implemented.

[0122] The limit value of the distance between the bird and the center point of the target crop area preset in the bird detection radar library refers to the minimum value of the distance between the bird and the center point of the target crop area after being driven away preset in the bird detection radar library.

[0123] In this embodiment, the shorter duration of high-frequency sound waves means that the birds are not stimulated for an insufficient time and cannot be effectively driven away. The smaller maximum intensity of high-frequency sound waves is not enough to have a sufficient deterrent effect on the birds, resulting in a poor driving effect, resulting in a large number of remaining birds, even more than the preset allowable remaining number of birds. The large number of remaining birds indicates that the driving effect is not thorough, and there are still a large number of birds stranded in the target area, which will directly lead to an increase in the damaged area of ​​target crops; the large number of remaining birds will also cause the birds to fly slower, even less than the preset allowable flight speed of birds. The slower bird flight speed means that the birds are not driven away by the driving measures. Instead of accelerating away, the birds move slowly in the target area, increasing the chance of contact with crops, making the distance between the birds and the center point of the target crop area smaller, or even smaller than the preset distance limit between the birds and the center point of the target crop area. The smaller distance between the birds and the center point of the target crop area indicates that the birds have not been effectively driven away from the target area and still pose a threat to the crops. Therefore, through a detailed analysis of each parameter in the bird detection radar repellent index, we can understand the effect of bird repellent measures and changes in bird activities, and quantify the effectiveness and efficiency of bird repellent measures, providing a basis for subsequent optimization of bird repellent strategies and improving the effect of bird repellent.

[0124] In this embodiment, the bird detecting radar repelling index is compared with the bird detecting radar repelling index threshold preset in the bird detecting radar library. If the bird detecting radar repelling index is greater than or equal to the preset bird detecting radar repelling index threshold, this indicates that the current bird repelling method has achieved the expected effect and can effectively drive birds away from the target crop area. In this case, there is no need to further optimize the bird repelling method of the bird detecting radar, and the existing settings and strategies can continue to be maintained; if the bird detecting radar repelling index is less than the preset bird detecting radar repelling index threshold, it means that the current bird repelling method has failed to achieve the expected effect, and there is a situation where birds are not fully repelled. At this time, the bird repelling method of the bird detecting radar needs to be optimized.

[0125] Specifically, the bird-repelling method of the bird-detecting radar is optimized. The specific optimization process can be to update the maximum intensity of the high-frequency sound wave to the maximum sound intensity of the bird detected, update the preset allowable bird flight speed to the slowest bird flight speed detected, and update the preset bird flight reference altitude to the lowest bird flight altitude, while increasing the duration of the high-frequency sound wave.

[0126] In this embodiment, by setting the maximum intensity of the high-frequency sound waves to the maximum sound intensity of the birds detected, it can be ensured that the sound waves produce sufficient stimulation and pressure on the birds, thereby improving the repelling effect. The repelling strategy is adjusted according to the slowest speed and lowest altitude of the detected birds, so that the repelling measures can be more targeted and adapted to the behavioral characteristics of different types of birds, thereby improving the success rate of repelling. Increasing the duration of the high-frequency sound waves can ensure that the birds are disturbed for a longer period of time, reducing the possibility of their return, thereby reducing the impact of the birds on the target area.

[0127] Reference Figure 2 As shown, the second aspect of the present invention provides a system for a crop protection method based on bird detecting radar, including: a bird detecting radar operation detection module, a target crop area bird activity detection module, a bird driving away evaluation module, a bird detecting radar bird driving away optimization module and a bird detecting radar library.

[0128] The bird detecting radar operation detection module is connected to the target crop area bird activity detection module, the target crop area bird activity detection module is connected to the bird driving away evaluation module, the bird driving away evaluation module is connected to the bird detecting radar bird driving away optimization module, and the bird detecting radar operation detection module, the target crop area bird activity detection module, the bird driving away evaluation module and the bird detecting radar bird driving away optimization module are all connected to the bird detecting radar library.

[0129] The bird detecting radar operation detection module is used to detect and obtain the operation data of the bird detecting radar, analyze it, obtain the bird detecting radar operation stability index, and compare it with the bird detecting radar operation stability index threshold preset in the bird detecting radar library. If the bird detecting radar operation stability index is greater than or equal to the bird detecting radar operation stability index threshold preset in the bird detecting radar library, the bird detecting radar is used to detect bird activities in the target crop area. Conversely, if the bird detecting radar operation stability index is less than the bird detecting radar operation stability index threshold preset in the bird detecting radar library, an early warning prompt is given for the operation status of the bird detecting radar.

[0130] The target crop area bird activity detection module is used to detect and obtain bird activity data in the target crop area in real time, and analyze the potential impact index of the bird activity, and compare it with the potential impact index limit value of the bird activity preset in the bird detection radar library. If the potential impact index of the bird activity is greater than or equal to the preset potential impact index limit value of the bird activity, the birds in the target crop area are driven away.

[0131] The bird driving away evaluation module is used to obtain data during the process of driving away birds in the target crop area and bird activity data in the target crop area after the birds are driven away from the target crop area, and comprehensively analyze to obtain the bird detection radar driving away index.

[0132] The bird detecting radar bird repelling optimization module is used to compare the bird detecting radar repelling index with the bird detecting radar repelling index threshold preset in the bird detecting radar library. If the bird detecting radar repelling index is less than the preset bird detecting radar repelling index threshold, the bird repelling mode of the bird detecting radar needs to be optimized.

[0133] The bird detecting radar library is used to store preset bird detecting radar operation stability index thresholds, preset bird activity potential impact index boundary values, preset bird detecting radar driving away index thresholds, preset reference scattering cross-sectional areas corresponding to actual detection distance intervals of each bird detecting radar, preset impact factors corresponding to detection distance efficiency ratio unit values, preset impact factors corresponding to scattering cross-sectional area efficiency ratio unit values, preset detection reference speeds, preset instantaneous signal boundary bandwidths, preset weight factors corresponding to bird detecting radar operation stability indexes, preset allowed number of birds, preset allowed flight speed of birds, preset reference flight height of birds, preset sound intensity thresholds, preset distance boundary values ​​between birds and the center point of a target crop area, preset impact factors corresponding to duration of high-frequency sound waves, preset impact factors corresponding to maximum intensity of high-frequency sound waves, preset impact factors corresponding to damaged target crop areas, preset allowed remaining number of birds, preset allowed flight speed of birds, and preset distance boundary values ​​between birds and the center point of a target crop area.

[0134] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined in this specification, they should all fall within the protection scope of the present invention.

Claims

1. A method for protecting crops based on bird-detecting radar, characterized in that: include: S1. Bird-detecting radar operation detection: detect and obtain the operation data of the bird-detecting radar, analyze it, obtain the bird-detecting radar operation stability index, and compare it with the bird-detecting radar operation stability index threshold preset in the bird-detecting radar library. If the bird-detecting radar operation stability index is greater than or equal to the bird-detecting radar operation stability index threshold preset in the bird-detecting radar library, the bird-detecting radar is used to detect bird activities in the target crop area. On the contrary, if the bird-detecting radar operation stability index is less than the bird-detecting radar operation stability index threshold preset in the bird-detecting radar library, an early warning prompt is issued for the operation status of the bird-detecting radar; S2. Detection of bird activity in target crop areas: Real-time detection and acquisition of bird activity data in target crop areas, and analysis to obtain the potential impact index of bird activity, which is compared with the preset limit value of the potential impact index of bird activity in the bird detection radar library. If the potential impact index of bird activity is greater than or equal to the preset limit value of the potential impact index of bird activity, the birds in the target crop area are driven away; S3. Bird repelling assessment: Obtain data during the process of repelling birds from the target crop area and data on bird activity in the target crop area after the birds are repelled from the target crop area, and conduct a comprehensive analysis to obtain the bird detection radar repelling index; S4. Bird-repelling optimization of bird-detecting radar: compare the bird-detecting radar repelling index with the bird-detecting radar repelling index threshold preset in the bird-detecting radar library. If the bird-detecting radar repelling index is less than the preset bird-detecting radar repelling index threshold, the bird-detecting radar bird repelling method needs to be optimized. The target crop area bird activity data specifically includes the number of birds in the target crop area at the current detection time point, the slowest bird flight speed, the lowest bird flight altitude, the maximum bird sound intensity, and the distance between each bird and the center point of the target crop area; The specific analysis process of the potential impact index of bird activities is as follows: Arrange the distances between each bird and the center point of the target crop area in ascending order, and obtain the distance ranked first, which is recorded as the minimum distance between the bird and the center point of the target crop area; Obtain the detection distance efficiency ratio, scattering cross-sectional area efficiency ratio, detection speed and maximum instantaneous signal bandwidth of the bird detection radar at the current detection time point; The detection distance efficiency ratio, scattering cross-sectional area efficiency ratio, detection speed and maximum instantaneous signal bandwidth of the bird-detecting radar at the current detection time point are comprehensively analyzed to obtain the operation stability index of the bird-detecting radar at the current detection time point; The potential impact index of bird activity is obtained by comprehensively analyzing the stability index of bird detection radar at the current detection time, the number of birds in the target crop area at the current detection time, the slowest bird flight speed, the lowest bird flight altitude, the maximum bird sound intensity, and the minimum distance between the bird and the center point of the target crop area; The data during the process of driving away birds from the target crop area specifically includes the duration of high-frequency sound waves in the target crop area during the process of driving away birds, the maximum intensity of high-frequency sound waves, and the damaged area of ​​the target crops; The target crop area bird activity data after the birds in the target crop area are driven away specifically includes the number of birds remaining in the target crop area after the birds are driven away, the slowest flying speed of the birds, and the minimum distance between the birds and the center point of the target crop area; The specific analysis process of the bird detection radar repelling index is as follows: The duration of high-frequency sound waves in the target crop area during the bird expulsion process, the maximum intensity of high-frequency sound waves, the damaged area of ​​target crops, the number of birds remaining in the target crop area after expulsion, the slowest flight speed of birds, and the minimum distance between birds and the center point of the target crop area are comprehensively analyzed to obtain the bird detection radar expulsion index. The specific analysis method is as follows: In the formula, is the bird radar driving away index, e is a natural constant, The duration of high-frequency sound waves in the target crop area during the bird-repelling process. The impact factor corresponding to the duration of high-frequency sound waves preset in the bird detection radar library, The maximum intensity of high-frequency sound waves in the target crop area during the bird-repelling process. The influence factor corresponding to the maximum intensity of high-frequency sound waves preset in the bird-detecting radar library. The target crop area damaged during the bird removal process is the target crop area. The impact factor corresponding to the target crop damage area preset in the bird detection radar library, is the number of birds remaining in the target crop area after the expulsion, The remaining number of birds allowed for the bird radar library is preset. The slowest flying speed of birds in the target crop area after being driven away. Bird flight allowable speed preset for bird radar library, is the minimum distance between the target crop area and the center point of the target crop area after the birds are driven away. The preset distance limit value between the bird and the center point of the target crop area for the bird detection radar library.

2. The crop protection method based on bird detection radar according to claim 1 is characterized in that: The operation data of the bird detecting radar specifically includes the detection speed, detection distance, average scattering cross-sectional area and maximum instantaneous signal bandwidth of the bird detecting radar during the operation detection cycle.

3. The crop protection method based on bird detection radar according to claim 2 is characterized in that: The specific analysis process of the bird detection radar operation stability index is as follows: Obtain the distance between the center point of the target crop area and the location where the bird-detecting radar is expected to be installed, and record it as the actual detection distance of the bird-detecting radar; The actual detection distance of the bird detecting radar is matched with the reference scattering cross-sectional area corresponding to the actual detection distance interval of each bird detecting radar preset in the bird detecting radar library to obtain the reference scattering cross-sectional area corresponding to the actual detection distance of the bird detecting radar; The detection distance of the bird detecting radar in the operation detection cycle is processed by ratio with the actual detection distance of the bird detecting radar to obtain the detection distance efficiency ratio of the bird detecting radar; The average scattering cross-sectional area of ​​the bird-detecting radar in the running detection cycle is ratio-processed with the reference scattering cross-sectional area corresponding to the actual detection distance of the bird-detecting radar to obtain the scattering cross-sectional area efficiency ratio of the bird-detecting radar; The detection distance efficiency ratio, scattering cross-sectional area efficiency ratio, detection speed of the bird detecting radar during the operation detection cycle and the maximum instantaneous signal bandwidth are comprehensively analyzed to obtain the operation stability index of the bird detecting radar.

4. The crop protection method based on bird detection radar according to claim 1 is characterized in that: The specific process of driving away birds from the target crop area is to start the high-energy sound wave bird driving device by issuing a bird driving command through a bird detection radar, and drive away the birds from the target crop area by the default high-frequency sound wave intensity of the high-energy sound wave bird driving device.

5. The crop protection method based on bird detection radar according to claim 1 is characterized in that: The bird-repelling method of the bird-detecting radar is optimized. The specific optimization process can be to update the maximum intensity of the high-frequency sound wave to the maximum sound intensity of the bird detected, update the preset allowable bird flight speed to the slowest bird flight speed detected, update the preset bird flight reference altitude to the lowest bird flight altitude, and increase the duration of the high-frequency sound wave.

6. A system for applying the crop protection method based on bird detection radar as claimed in any one of claims 1 to 5, characterized in that: include: The bird-detecting radar operation detection module is used to detect and obtain the operation data of the bird-detecting radar, analyze it, obtain the bird-detecting radar operation stability index, and compare it with the bird-detecting radar operation stability index threshold preset in the bird-detecting radar library. If the bird-detecting radar operation stability index is greater than or equal to the bird-detecting radar operation stability index threshold preset in the bird-detecting radar library, the bird-detecting radar is used to detect bird activities in the target crop area. On the contrary, if the bird-detecting radar operation stability index is less than the bird-detecting radar operation stability index threshold preset in the bird-detecting radar library, an early warning prompt is given for the operation status of the bird-detecting radar. The bird activity detection module in the target crop area is used to detect and obtain the bird activity data in the target crop area in real time, and analyze the potential impact index of the bird activity, and compare it with the preset limit value of the potential impact index of the bird activity in the bird detection radar library. If the potential impact index of the bird activity is greater than or equal to the preset limit value of the potential impact index of the bird activity, the birds in the target crop area are driven away; The bird driving away evaluation module is used to obtain the data during the bird driving away process in the target crop area and the bird activity data in the target crop area after the birds are driven away in the target crop area, and comprehensively analyze to obtain the bird detection radar driving away index; The bird-detecting radar bird-repelling optimization module is used to compare the bird-detecting radar repelling index with the bird-detecting radar repelling index threshold preset in the bird-detecting radar library. If the bird-detecting radar repelling index is less than the preset bird-detecting radar repelling index threshold, the bird-detecting radar's bird-repelling method needs to be optimized.

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