Tobacco field surrounding land area measuring method and system based on Beidou positioning

Abstract

The invention discloses a tobacco field surrounding land area measuring method and system based on Beidou positioning, and the system comprises a Beidou positioning module which is used for obtaining the longitude and latitude coordinates of a user's surrounding track in real time; the image acquisition and processing module is used for capturing farmland boundary characteristics through a mobile phone camera and identifying a tobacco field and a non-agricultural area; the edge calculation engine is used for preprocessing the positioning / image data at the mobile phone end; longitude and latitude coordinates of a detour track of a user are acquired in real time by using a Beidou positioning module, and the accuracy of a measurement position is ensured; the inertial navigation compensation module provides continuous position calculation when the Beidou signal is weak, so that the robustness and reliability of the system are enhanced; the AR navigation guide module superposes a virtual boundary line through an AR interface to guide a user to walk along an optimal path, so that the human deviation is reduced, and the measurement precision is improved; the image acquisition and processing module captures farmland boundary features through a mobile phone camera, identifies tobacco fields and non-agricultural areas, and provides accurate boundary information for area calculation.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco field acreage measurement, and in particular to a tobacco field acreage measurement method and system based on Beidou positioning. Background Art

[0002] Tobacco fields refer to farmland specifically used for growing tobacco. Tobacco (especially for producing tobacco leaves) usually requires specific climatic conditions, soil types, and sophisticated agricultural management techniques to ensure its healthy growth and leaf quality. During actual planting, the area of tobacco fields needs to be measured. Measuring the area of tobacco fields helps to rationally plan and manage land resources and ensure that the planting density meets the optimal requirements for tobacco growth. Overly dense planting may lead to poor air circulation, affecting the photosynthesis and growth of plants. Existing measurements usually calculate the length and width of the land by the number of steps, and then calculate the area through a formula, or use ropes or measuring wheels to measure the circumference of the field or the straight-line distance. The area is obtained through simple calculations. The above prevents inefficient operations and is suitable for fields of regular shapes. The accuracy is lower for fields with irregular terrain. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and system for measuring the acreage of tobacco fields based on Beidou positioning to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a tobacco field perimeter measurement system based on Beidou positioning, comprising:

[0005] Beidou positioning module, used to obtain the longitude and latitude coordinates of the user's orbit in real time;

[0006] Image acquisition and processing module, used to capture farmland boundary features and identify tobacco fields and non-agricultural areas through mobile phone cameras;

[0007] Edge computing engine, used to pre-process positioning / image data on the mobile phone;

[0008] Cloud data processing module, used to receive and store user data and run complex correction algorithms;

[0009] The AR navigation guidance module is used to superimpose virtual boundary lines on the AR interface to guide users along the optimal path and reduce deviations;

[0010] Offline cache module, used to temporarily store local data when there is no network;

[0011] Energy consumption management module, used to dynamically adjust the sampling frequency of positioning / camera;

[0012] The agricultural input calculation module is used to automatically calculate the required fertilizer / pesticide dosage based on the acreage measurement results.

[0013] Preferably, it also includes an inertial navigation compensation module, which is used to continuously calculate the position through the mobile phone IMU when the Beidou signal is weak.

[0014] Preferably, it also includes a multimodal data fusion module, which is used to fuse Beidou trajectory and image boundary data and generate high-precision closed-loop area calculation results.

[0015] Preferably, it also includes a blockchain evidence storage module, which uploads the measurement result hash value to the chain for insurance claim evidence storage.

[0016] Preferably, the agricultural input calculation module includes a crop demand database, a soil quality and type analysis unit, and a crop growth stage analysis unit;

[0017] The crop demand database is used to store reference data on the amount of fertilizers and pesticides required for different crops at different growth stages;

[0018] The soil quality and type analysis unit is used to evaluate soil parameters;

[0019] The crop growth stage analysis unit is used to calculate the fertilizers and pesticides required for the crops according to their growth stages.

[0020] Preferably, the agricultural input calculation module further includes an area and path measurement unit and a climate data processing unit. The area and path measurement unit calculates the actual area of the farmland based on the user's measurement results, and then estimates the required amount of agricultural inputs.

[0021] The climate data processing unit is used to obtain and process climate information to determine special needs that arise during crop growth.

[0022] A method for measuring the acreage of a tobacco field based on Beidou positioning comprises the following steps:

[0023] Step 1: The Beidou positioning module acquires location information: The Beidou positioning module obtains longitude and latitude coordinates in real time through the Beidou chip built into the mobile phone. The inertial navigation compensation module calculates displacement in signal-blocked areas through the mobile phone's gyroscope and accelerometer. The energy consumption management module dynamically adjusts the positioning sampling rate.

[0024] Step 2: A mobile app enables remote control and data transmission: The AR navigation module superimposes virtual boundary lines on the real-time camera image to guide users along the edge of the tobacco field. The image acquisition and processing module captures a photo of the tobacco field boundary at regular intervals and uses a model to identify crop characteristics. The edge computing engine calculates the area in real time on the mobile phone. Once the tobacco field area is measured, the agricultural input calculation module automatically analyzes the specific land needs and uploads key trajectory points to the cloud.

[0025] Step 3. The server implements data storage and processing: The cloud data processing module performs elevation correction on the uploaded trajectory points and calculates the projected area. The security and compliance module encrypts the data when it is uploaded and desensitizes it when it is stored. The blockchain evidence storage module uploads the hash value of the measurement result to the chain to generate an unalterable electronic certificate.

[0026] Preferably, the crop feature in step 2 is tobacco leaf texture, and the offline cache module in step 2

[0027] Temporarily store data when there is no network, and automatically synchronize to the cloud after the network is restored.

[0028] Compared with the existing technology, the beneficial effects of the present invention are as follows: the Beidou positioning module is used to obtain the latitude and longitude coordinates of the user's detour trajectory in real time to ensure the accuracy of the measured position; the inertial navigation compensation module provides continuous position estimation when the Beidou signal is weak, thereby enhancing the robustness and reliability of the system; the AR navigation guidance module superimposes a virtual boundary line on the AR interface to guide the user to walk along the optimal path, thereby reducing human bias and improving measurement accuracy; the image acquisition and processing module captures the boundary features of farmland through the mobile phone camera, identifies tobacco fields and non-agricultural areas, and provides accurate boundary information for area calculation; the multimodal data fusion module fuses the Beidou trajectory and image boundary data to generate a high-precision closed-loop surface The edge computing engine pre-processes positioning / image data on the mobile phone, reducing the burden on the cloud server and improving processing efficiency. The cloud data processing module receives and stores user data and runs complex correction algorithms to ensure data accuracy and reliability. The offline cache module temporarily stores local data when there is no network, and automatically synchronizes it to the cloud after the network is restored, ensuring data integrity and continuity. The energy consumption management module dynamically adjusts the sampling frequency of the positioning / camera, effectively extending the battery life of the mobile phone. The agricultural input calculation module automatically calculates the required fertilizer / pesticide dosage based on the acreage measurement results, providing farmers with scientific recommendations on the use of agricultural inputs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the method of the present invention. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1The present invention provides a technical solution: a tobacco field acreage measurement system based on Beidou positioning, comprising:

[0032] Beidou positioning module, used to obtain the longitude and latitude coordinates of the user's orbit in real time;

[0033] Image acquisition and processing module, used to capture farmland boundary features and identify tobacco fields and non-agricultural areas through mobile phone cameras;

[0034] Edge computing engine, used to pre-process positioning / image data on the mobile phone;

[0035] Cloud data processing module, used to receive and store user data and run complex correction algorithms;

[0036] The AR navigation guidance module is used to superimpose virtual boundary lines on the AR interface to guide users along the optimal path and reduce deviations;

[0037] Offline cache module, used to temporarily store local data when there is no network;

[0038] Energy consumption management module, used to dynamically adjust the sampling frequency of positioning / camera;

[0039] The agricultural input calculation module is used to automatically calculate the required fertilizer / pesticide dosage based on the acreage measurement results.

[0040] It should be noted that the Beidou positioning module of the present invention obtains the latitude and longitude coordinates of the user's detour in real time; the Beidou positioning system provides high-precision geographic location information through the cooperation of satellites and ground receivers; after entering the tobacco field, the user records his or her detour through the Beidou module, thereby obtaining the boundary information of the entire field; the image acquisition and processing module captures the boundary features of the farmland through the mobile phone camera, and identifies the tobacco field and non-agricultural areas; the user uses the mobile phone camera to shoot the boundary of the tobacco field, and the collected image contains the visual features of the tobacco field, such as vegetation type, terrain changes, etc.; the system uses image processing algorithms, such as edge detection, morphological operations, region segmentation, etc., to identify and extract the boundary line of the tobacco field; the image acquisition and processing module captures the boundary features of the tobacco field through the mobile phone camera Pixel analysis of the image automatically distinguishes between tobacco fields and surrounding non-agricultural areas, such as roads and open spaces, to reduce errors. The edge computing engine pre-processes positioning and image data on the mobile phone to reduce data transmission delays. The edge computing engine performs preliminary fusion processing on the collected positioning data and image data, such as filtering of geographic data and preliminary identification of image boundaries, to reduce the computational burden of transmission to the cloud. During the measurement process, users can see the estimated results of boundaries and paths in real time to avoid errors caused by delays. The cloud data processing module receives and stores user data and runs complex correction algorithms. The cloud system receives data transmitted from the mobile phone (such as positioning data, image data, etc.) and stores and manages the data. For example, using data from multiple detours, , combined with high-precision maps, it can accurately calculate the area of tobacco fields and perform multi-dimensional data correction of location and time; the AR navigation guidance module superimposes virtual boundary lines through the AR interface to guide users to walk along the optimal path and reduce deviations; through the mobile phone camera and screen, the virtual boundary of the tobacco field is displayed in real time to help users walk along the boundary accurately and avoid repeated measurements due to visual errors or unclear paths; the AR navigation module not only guides users to walk along the boundary, but also automatically plans the optimal path according to the shape and position of the field, reducing walking deviations and improving measurement efficiency; the offline cache module temporarily stores local data when there is no network connection; the offline cache module will temporarily store positioning data and image data when there is no network connection; users can After the network is restored, the cached data is uploaded to the cloud for further processing. Users may encounter unstable signals when working in the field. Offline caching ensures that data is not lost, improving the user experience. The energy consumption management module dynamically adjusts the sampling frequency of the positioning / camera to optimize system energy consumption. By analyzing the system's energy consumption status in real time, the sampling frequency of the positioning module and camera is adjusted. For example, when the user is standing still, the system will reduce the positioning frequency to reduce battery consumption; when the user moves quickly, the sampling frequency is increased to ensure data accuracy. The module ensures that the battery power of the device can last longer under long-term outdoor use, reducing the trouble of frequent charging. The agricultural input calculation module automatically calculates the required fertilizer / pesticide dosage based on the acreage measurement results.According to the tobacco field area measured by the system, combined with the fertilization / pesticide application standards of different crops, the required amount of agricultural materials is automatically calculated; this includes the type and amount of fertilizers, the amount of pesticides used, the frequency of spraying, etc.; through accurate area measurement, excessive fertilization and pesticide waste are reduced, helping farmers achieve more environmentally friendly and economical agricultural production; during operation, the user enters the tobacco field, and the system starts to record the user's walking trajectory through the Beidou positioning module to ensure accurate acquisition of the field boundary information; the user uses the mobile phone camera to shoot the tobacco field boundary, and the image acquisition and processing module identifies the field boundary features; the edge computing engine collects and processes the data. The received positioning data and image data are pre-processed in real time to ensure timely feedback and accuracy. The AR navigation guidance module uses augmented reality technology to guide users along the tobacco field boundaries in real time, reducing errors and optimizing paths. The offline cache module temporarily stores data when the network is unstable to ensure data loss. The cloud data processing module receives and analyzes user data, runs complex correction algorithms, and generates accurate tobacco field areas. The agricultural input calculation module automatically calculates the required fertilizer and pesticide dosage based on the tobacco field area. Finally, a report is generated, allowing users to view detailed area measurement results and agricultural production recommendations.

[0041] The system also includes an inertial navigation compensation module, a multimodal data fusion module, and a blockchain evidence storage module. The inertial navigation compensation module is used to continuously estimate position using the mobile phone's IMU when the Beidou signal is weak. The multimodal data fusion module is used to fuse Beidou trajectory and image boundary data to generate high-precision closed-loop area calculation results. The blockchain evidence storage module uploads the hash value of the measurement results to the blockchain for insurance claim evidence storage.

[0042] It should be noted that the inertial navigation compensation module of the present invention is used to continuously calculate the position through the built-in IMU (inertial measurement unit) of the mobile phone when the Beidou signal is weak; the IMU sensor includes an accelerometer, a gyroscope and a magnetometer, which can detect the acceleration, rotational angular velocity and other information of the mobile phone in real time; combined with this information, even when the Beidou signal is poor or completely lost, the system can still calculate the user's current position through inertial navigation; compensation is used when the Beidou positioning signal is unstable, such as in urban canyons, dense forests, etc., the system calculates the user's motion path through the inertial navigation compensation module to ensure the continuity of position information; combining inertial navigation and Beidou positioning data can effectively reduce the error caused by signal loss; multimodal data fusion module Used to weight the fusion of Beidou trajectory and image boundary data to generate high-precision closed-loop area calculation results; this module is mainly responsible for effectively fusing data from different sensors, such as Beidou positioning module, camera image acquisition module, IMU, etc.; providing accurate positioning data, marking the trajectory of the user's detour; identifying the field boundary features through the image processing module; providing compensation information through inertial navigation when the signal is poor; the multimodal data fusion module adopts advanced fusion algorithms (such as Kalman filtering, particle filtering, etc.) to dynamically adjust the weights according to the reliability and accuracy of different data sources; the fused data will be used to generate a more accurate closed-loop measurement result to ensure the accuracy of tobacco field area calculation, especially in Under complex environmental conditions (such as obstacles, changing terrain, etc.); the blockchain evidence module is used to upload the hash value of the measurement result to the chain for insurance claim evidence and data security; the hash value of the measurement result (the unique digital signature generated by encrypting the data) will be uploaded to the blockchain network; the immutability of blockchain technology ensures the authenticity and security of the data; once the data is recorded on the blockchain, anyone can query the detailed record of the data through the blockchain browser and verify its immutability; the blockchain evidence module provides official and transparent records for farmland measurement, ensuring that agricultural insurance can be based on data when claims occur, avoiding human tampering or fraud; when working, the user enters the tobacco field, Beidou positioning The module begins recording the user's trajectory. If the Beidou signal is weak, the inertial navigation compensation module will use the phone's IMU sensor data to compensate for position, ensuring continuous location information updates. The image acquisition and processing module uses the phone's camera to capture the tobacco field boundary, identify the field's visual features, and provide boundary data. The multimodal data fusion module fuses multiple data sources such as Beidou trajectory, image boundary, and IMU data to generate high-precision closed-loop area calculation results, further improving measurement accuracy. The AR navigation guidance module uses AR technology to guide users along the boundary, ensuring that users follow the optimal path and displaying the virtual boundary of the tobacco field. The offline cache module temporarily stores data when the signal is lost to ensure that data is not lost.The cloud-based data processing module receives data and runs complex algorithms to perform final tobacco field area calculations, make corrections, and generate reports. The blockchain evidence storage module stores the hash value of the calculation results on the chain, ensuring transparency and immutability of the results, providing a reliable chain of evidence, particularly useful in the insurance claims process. The agricultural input calculation module calculates the required amount of fertilizer, pesticide, etc. based on the area measurement results.

[0043] The agricultural input calculation module includes a crop demand database, a soil quality and type analysis unit, a crop growth stage analysis unit, and the agricultural input calculation module also includes an area and path measurement unit and a climate data processing unit;

[0044] The crop demand database is used to store reference data on the amount of fertilizers and pesticides required for different crops at different growth stages;

[0045] The soil quality and type analysis unit is used to evaluate soil parameters;

[0046] The crop growth stage analysis unit is used to calculate the fertilizer and pesticide required according to the growth stage of the crop. The area and path measurement unit calculates the actual area of the farmland based on the user's measurement results, and then estimates the required amount of agricultural materials.

[0047] The climate data processing unit is used to obtain and process climate information to determine special needs that arise during crop growth.

[0048] It should be noted that the crop demand database of the present invention can store reference data on the amount of fertilizers and pesticides required for different crops at different growth stages; the database contains detailed information on various crops, such as rice, wheat, corn, vegetables, etc., especially the standard amounts of fertilizers (such as nitrogen, phosphorus, and potassium fertilizers) and pesticides (such as insecticides and herbicides) required at different growth stages; the growth stages of crops include germination, vegetative growth, flowering, and fruiting, and the demand for each stage is different; the nutritional requirements and disease and pest resistance requirements of different crops vary greatly; the database provides accurate reference data based on the growth characteristics of different crops; when farmers input the crop type and its current growth stage, the system can automatically query the database and output the standard amount of fertilizers (such as nitrogen, phosphorus, and potassium fertilizers) and pesticides (such as insecticides and herbicides) required for the crop at different growth stages. The types and amounts of fertilizers and pesticides required at the current stage help farmers develop accurate fertilization and spraying plans; the soil quality and type analysis unit can evaluate various soil parameters, such as pH value, moisture, fertility, etc., to help determine the type and quality of the soil; the soil quality and type analysis unit evaluates the basic conditions of the soil through soil sampling and analysis (such as pH, nitrogen, phosphorus and potassium content, soil organic matter content, etc.); the soil pH value affects the crop's ability to absorb nutrients, and acidic soil and alkaline soil have different effects on crop growth; the fertility of the soil determines the crop's demand for external fertilizers; soil with higher fertility requires less fertilizer; based on the soil analysis results, the agricultural input calculation module can more accurately adjust the recommended amount of fertilizers and pesticides to avoid overdosing Fertilizer or waste of resources; the crop growth stage analysis unit can calculate the fertilizer and pesticide required according to the growth stage of the crop; the crop growth stage analysis unit dynamically adjusts the recommended amount of fertilizer and pesticide according to the current growth stage of the crop (such as germination period, tillering period, heading period, etc.) combined with the data in the crop demand database; for example, more nitrogen fertilizer will be needed during the vegetative growth period, while the demand for potassium fertilizer will increase during the flowering and fruiting periods; different growth stages of crops will also encounter different threats of pests and diseases, so the demand for pesticides will also change accordingly; the system can determine whether pest and disease control is needed according to the crop growth stage; when the crop enters a certain growth stage, the system automatically adjusts the recommended agricultural materials according to the preset crop needs and historical data The area and path measurement unit can calculate the actual area of the farmland based on the user's measurement results, and then estimate the required amount of agricultural inputs. The measurement unit can calculate the actual area of the farmland through the user's positioning data and path information. By combining multiple measurement methods (such as GPS, image boundary recognition, etc.), the area of the farmland can be accurately obtained. Based on the actual area of the farmland, the system can calculate the required amount of fertilizers, pesticides and other agricultural inputs. For example, if the user measures the area of a large field, the system will automatically calculate the amount of fertilizers and pesticides used based on the area and crop type, helping the user to accurately apply fertilizers. The climate data processing unit can obtain and process climate information to determine special needs that arise during crop growth.The climate data processing unit can obtain local climate data in real time, such as temperature, humidity, precipitation, wind speed, etc., analyze climate change, and infer the impact of climate on crop growth; for example, during drought periods, the system will increase the recommended amount of irrigation and fertilization; in hot weather, the system will recommend increasing drought-resistant fertilizers or shading measures; the unit can also make predictions about climate change in the next few days, and adjust crop management strategies (such as preventing pests and diseases, increasing water, etc.) in a timely manner based on the prediction results; when extreme weather or abnormal climate occurs (such as continuous drought or heavy rain), the climate data processing unit can automatically adjust the agricultural input calculation strategy to cope with the impact of these special climate conditions on crop growth During operation, the user enters basic information such as crop type, current growth stage, soil type, and plot area. The soil quality and type analysis unit performs analysis, assessing soil fertility, pH value, and other parameters. The amount of fertilizer and pesticide required for the crop is calculated based on the crop demand database and the crop growth stage analysis unit. The area and path measurement unit calculates the actual area of the farmland and adjusts the recommended fertilizer and pesticide amounts accordingly. The climate data processing unit analyzes current climate conditions and future forecasts to dynamically adjust the amount of agricultural inputs used (such as increasing water or drought-resistant fertilizers during droughts). Based on these analysis results, the system outputs detailed calculations of the required agricultural inputs, including fertilizer type, quantity, and application method.

[0049] A method for measuring the acreage of a tobacco field based on Beidou positioning comprises the following steps:

[0050] Beidou positioning module realizes location information acquisition

[0051] The Beidou positioning module uses the phone's built-in Beidou chip to obtain the longitude and latitude coordinates of the tobacco field's location in real time. When the device is in an area with unobstructed signal, the positioning module accurately provides location information. In areas with signal obstruction, the inertial navigation compensation module uses the phone's built-in gyroscope and accelerometer to infer the device's displacement, maintaining position tracking. The energy management module dynamically adjusts the positioning sampling rate based on signal strength, increasing it when the signal is clear and reducing it when the signal is weak to reduce energy consumption.

[0052] Mobile App enables remote control and data transmission

[0053] Users use the AR navigation module via a mobile app. The phone's camera captures real-time images of the tobacco field's edge and overlays a virtual boundary line to guide the user along the field's edge. At regular intervals, the image acquisition and processing module automatically captures photos of the tobacco field's boundary. These photos are then transmitted to the image recognition system for processing, which identifies the tobacco leaf's texture features to determine the field's actual boundary. The edge computing engine performs real-time area calculations on the phone and uploads only data from key trajectory points to the cloud. In an offline environment, the offline cache module temporarily saves data and automatically synchronizes it to the cloud when the network is restored.

[0054] Agricultural materials calculation module estimates resource requirements

[0055] Once the tobacco field area is measured, the agricultural input calculation module automatically analyzes the specific needs of the land. By analyzing the tobacco field area, soil type, and climatic conditions, the module accurately estimates the required fertilizer, pesticide, water, and other agricultural inputs. The agricultural input calculation module integrates historical data and the latest agricultural research findings to automatically recommend appropriate fertilizer and pesticide application plans based on the current tobacco variety and region being cultivated. It also calculates the optimal application time and frequency for each agricultural input to ensure optimal growing conditions in the tobacco field.

[0056] Servers implement data storage and processing

[0057] After receiving the uploaded trajectory points, the cloud-based data processing module first performs elevation correction and calculates the projected area. All uploaded data is encrypted to ensure data security and desensitized during storage to protect user privacy. The blockchain evidence storage module stores the hash value of the measurement results on the blockchain, generating an immutable electronic certificate to ensure the authenticity and legitimacy of the measurement data.

[0058] Generate agricultural input formula and management suggestions after integration and feedback

[0059] In the cloud, the results of the agricultural input calculation module are combined with information such as the tobacco field's location, environmental data, and crop varieties to generate a comprehensive agricultural management report. This report not only includes the precise area of the tobacco field and recommended agricultural input formulas (such as fertilizer ratios and pesticide application plans), but also incorporates real-time meteorological data to provide recommendations for fertilization and irrigation timing. The system also provides climate change forecasts to help farmers adjust management strategies and maximize tobacco field production benefits.

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tobacco field acreage measurement system based on Beidou positioning, characterized by: include: Beidou positioning module, used to obtain the longitude and latitude coordinates of the user's orbit in real time; Image acquisition and processing module, used to capture farmland boundary features and identify tobacco fields and non-agricultural areas through mobile phone cameras; Edge computing engine, used to pre-process positioning / image data on the mobile phone; Cloud data processing module, used to receive and store user data and run complex correction algorithms; The AR navigation guidance module is used to superimpose virtual boundary lines on the AR interface to guide users along the optimal path and reduce deviations; Offline cache module, used to temporarily store local data when there is no network; Energy consumption management module, used to dynamically adjust the sampling frequency of positioning / camera; The agricultural input calculation module is used to automatically calculate the required fertilizer / pesticide dosage based on the acreage measurement results.

2. The tobacco field acreage measurement system based on Beidou positioning according to claim 1 is characterized by: It also includes an inertial navigation compensation module, which is used to continuously calculate the position through the mobile phone IMU when the Beidou signal is weak.

3. The tobacco field acreage measurement system based on Beidou positioning according to claim 2 is characterized by: It also includes a multimodal data fusion module, which is used to fuse Beidou trajectory and image boundary data and generate high-precision closed-loop area calculation results.

4. The tobacco field acreage measurement system based on Beidou positioning according to claim 3 is characterized by: It also includes a blockchain evidence storage module, which uploads the measurement result hash value to the chain for insurance claim evidence storage.

5. The tobacco field acreage measurement system based on Beidou positioning according to claim 4 is characterized by: The agricultural input calculation module includes a crop demand database, a soil quality and type analysis unit, and a crop growth stage analysis unit; The crop demand database is used to store reference data on the amount of fertilizers and pesticides required for different crops at different growth stages; The soil quality and type analysis unit is used to evaluate soil parameters; The crop growth stage analysis unit is used to calculate the fertilizers and pesticides required for the crops according to their growth stages.

6. The tobacco field acreage measurement system based on Beidou positioning according to claim 5 is characterized by: The agricultural input calculation module also includes an area and path measurement unit and a climate data processing unit. The area and path measurement unit calculates the actual area of the farmland based on the user's measurement results, and then estimates the required amount of agricultural inputs; The climate data processing unit is used to obtain and process climate information to determine special needs that arise during crop growth.

7. The method for measuring acres of tobacco fields based on Beidou positioning according to claim 6, characterized in that: The following steps are involved: Step 1: The Beidou positioning module acquires location information: The Beidou positioning module obtains longitude and latitude coordinates in real time through the Beidou chip built into the mobile phone. The inertial navigation compensation module calculates displacement in signal-blocked areas through the mobile phone's gyroscope and accelerometer. The energy consumption management module dynamically adjusts the positioning sampling rate. Step 2: A mobile app enables remote control and data transmission: The AR navigation module superimposes virtual boundary lines on the real-time camera image to guide users along the edge of the tobacco field. The image acquisition and processing module captures a photo of the tobacco field boundary at regular intervals and uses a model to identify crop characteristics. The edge computing engine calculates the area in real time on the mobile phone. Once the tobacco field area is measured, the agricultural input calculation module automatically analyzes the specific land needs and uploads key trajectory points to the cloud. Step 3. The server implements data storage and processing: The cloud data processing module performs elevation correction on the uploaded trajectory points and calculates the projected area. The security and compliance module encrypts the data when it is uploaded and desensitizes it when it is stored. The blockchain evidence storage module uploads the hash value of the measurement result to the chain to generate an unalterable electronic certificate.

8. The tobacco field acreage measurement system based on Beidou positioning according to claim 7 is characterized by: The crop feature in step 2 is tobacco leaf texture, and the offline cache module in step 2 Temporarily store data when there is no network, and automatically synchronize to the cloud after the network is restored.

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