Plant moisture and nutrient regulation and control method and device based on flexible wearable sensor

Abstract

The invention provides a plant moisture and nutrient regulation and control method and device based on a flexible wearable sensor, and relates to the technical field of agriculture. The system comprises a flexible wearable sensor, an environment monitoring sensor, a monitoring terminal and water and fertilizer integrated feedback irrigation equipment, the method comprises the following steps: acquiring stem diameter change data and environmental data of a target plant; inputting the stem diameter change data and the environmental data in the target time period into a water and fertilizer integrated feedback irrigation model, and outputting a prediction result; determining an evaluation function value of the target plant based on a preset evaluation function, and further determining the health state of the target plant; implementing a graded irrigation strategy; the growth state of the plant is monitored through the wearable flexible sensor, the growth health state of the plant is accurately judged in cooperation with environment monitoring data, graded water and fertilizer integrated irrigation is implemented, and the production efficiency and the product quality are improved while resource waste is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of agriculture, and in particular, to a method and device for regulating plant water and nutrients based on a flexible wearable sensor. Background Art

[0002] Smart agriculture is the advanced stage of agricultural development from digitalization to networking and then to intelligentization, and has become the trend of modern agricultural development. Sensing technology plays an important role in smart agriculture and is the key and core of smart agriculture. Traditional agricultural sensors are usually hard and lack flexibility, which easily hinders the growth of plants and may even damage plants, and cannot meet the needs of modern agriculture for long-term, in-situ, fixed-point and continuous monitoring of plant physiological information. Without data support, it is impossible to accurately judge the growth status of plants, let alone establish an intelligent irrigation system. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and device for regulating plant water and nutrients based on a flexible wearable sensor. By using a wearable flexible sensor to monitor the growth status of plants and combining with environmental monitoring data, the growth and health status of plants can be accurately judged, and hierarchical water and fertilizer integrated irrigation can be implemented, reducing resource waste while improving production efficiency and product quality.

[0004] In the first aspect, the present invention provides a method for regulating plant water and nutrients based on a flexible wearable sensor, which is applied to a plant water and nutrient regulation system. The plant water and nutrient regulation system includes: a flexible wearable sensor, an environmental monitoring sensor, a monitoring terminal, and a water and fertilizer integrated feedback irrigation device; the method for regulating plant water and nutrients based on a flexible wearable sensor includes: Obtaining the stem diameter change data of a target plant based on the flexible wearable sensor; Obtaining the environmental data of the environment where the target plant is located based on the environmental monitoring sensor; wherein, the environmental data includes at least one of the following: soil humidity, light intensity, and temperature; The monitoring terminal inputs the stem diameter change data within a target time period and the environmental data within the target time period into a pre-trained water and fertilizer integrated feedback irrigation model, and outputs a prediction result; wherein, the end point of the target time period is the current moment, and the length is a preset duration; the prediction result indicates whether the target plant is short of water and / or lacks elements; Determining the evaluation function value of the target plant based on the stem diameter change data, the environmental data, a preset plant state coefficient, and the prediction result based on a preset evaluation function; Determining the health status of the target plant based on the evaluation function value and a preset evaluation function value range; Adjusting the hierarchical watering strategy of the target plant based on the health status.

[0005] In some preferred embodiments of the present invention, the evaluation function is constrained based on the nutrient deficiency index and the water deficiency index.

[0006] In some preferred embodiments of the present invention, the nutrient deficiency index is constrained based on the following formula: A = {(a + b) × (3f1(D) + f2(S)) + (b + c + d) × f1(D)} × f3(L) × f4(T) × f5(M); Wherein, A is the nutrient deficiency index; a is the water deficiency coefficient; b is the nitrogen deficiency coefficient; c is the phosphorus deficiency coefficient; d is the potassium deficiency coefficient; f1(D) is the stem diameter change data function; f2(S) is the soil humidity function; f3(L) is the light intensity function; f4(T) is the temperature function; f5(M) is the prediction result function.

[0007] In some preferred embodiments of the present invention, the water deficiency index is constrained based on the following formula: B = {a(4f1(D) + f2(S)) × f3(L)} × f4(T) × f5(M); Wherein, B is the water deficiency index; a is the water deficiency coefficient; f1(D) is the stem diameter change data function; f2(S) is the soil humidity function; f3(L) is the light intensity function; f4(T) is the temperature function; f5(M) is the prediction result function.

[0008] In some preferred embodiments of the present invention, the flexible wearable sensor includes: a flexible sensor and a resistor; the flexible sensor includes: a flexible material and a data line; The flexible material is wound around the stem of the target plant; Both ends of the flexible material are connected to the resistor through the data line.

[0009] In some preferred embodiments of the present invention, the flexible material includes: an elastic conductive inner core and an elastic insulating outer sheath; the elastic insulating outer sheath is sleeved outside the elastic conductive inner core.

[0010] In some preferred embodiments of the present invention, the elastic conductive inner core is a silk-based conductive carbon fabric inner core; The elastic insulating outer sheath is a polydimethylsiloxane elastic insulating outer sheath or an aliphatic-aromatic random copolyester elastic insulating outer sheath.

[0011] In some preferred embodiments of the present invention, the method further includes: preparing the elastic conductive inner core through the following steps: Twist the silk georgette fiber to make the warp yarn, make the parallel silk georgette fibers into the weft yarn, and arrange the warp yarn and the weft yarn into a silk fabric; High-temperature carbonize the silk fabric in an inert atmosphere to obtain the elastic conductive inner core.

[0012] In some preferred embodiments of the present invention, the thickness of the polydimethylsiloxane elastic insulating jacket and the length of the flexible material are constrained based on the following formula: ; where y is the length of the flexible material in centimeters; x is the thickness of the polydimethylsiloxane elastic insulating jacket in millimeters.

[0013] In a second aspect, the present invention provides a plant water and nutrient regulation device based on a flexible wearable sensor, which is applied to a plant water and nutrient regulation system. The plant water and nutrient regulation system includes: a flexible wearable sensor, an environmental monitoring sensor, a monitoring terminal, and a water and fertilizer integrated feedback irrigation device; the plant water and nutrient regulation device based on a flexible wearable sensor includes: A stem diameter change data determination module, configured to obtain stem diameter change data of a target plant based on the flexible wearable sensor; An environmental data determination module, configured to obtain environmental data of the environment where the target plant is located based on the environmental monitoring sensor; wherein, the environmental data includes at least one of the following: soil humidity, light intensity, and temperature; A health status prediction module, configured to input the stem diameter change data within a target time period and the environmental data within the target time period into a pre-trained water and fertilizer integrated feedback irrigation model by the monitoring terminal, and output a prediction result; wherein, the end point of the target time period is the current moment, and the length is a preset duration; the prediction result indicates whether the target plant is short of water and / or lacks nutrients; An evaluation function value determination module, configured to determine an evaluation function value of the target plant based on the stem diameter change data, the environmental data, a preset plant state coefficient, and the prediction result based on a preset evaluation function; A health status determination module, configured to determine the health status of the target plant based on the evaluation function value and a preset evaluation function value range; A watering strategy determination module, configured to adjust the hierarchical watering strategy of the target plant based on the health status.

[0014] The present invention brings the following beneficial effects: The present invention provides a method and device for regulating plant water and nutrients based on a flexible wearable sensor, which are applied to a plant water and nutrient regulation system. The plant water and nutrient regulation system includes: a flexible wearable sensor, an environmental monitoring sensor, a monitoring terminal, and a water and fertilizer integrated feedback irrigation device; The method for regulating plant water and nutrients based on a flexible wearable sensor includes: obtaining the stem diameter change data of a target plant based on the flexible wearable sensor; obtaining the environmental data of the environment where the target plant is located based on the environmental monitoring sensor; wherein, the environmental data includes at least one of the following: soil humidity, light intensity, and temperature; The monitoring terminal inputs the stem diameter change data within a target time period and the environmental data within the target time period into a pre-trained water and fertilizer integrated feedback irrigation model, and outputs a prediction result; wherein, the end point of the target time period is the current moment, and the length is a preset duration; The prediction result represents whether the target plant is short of water and / or lacks nutrients; determining the evaluation function value of the target plant based on the stem diameter change data, environmental data, a preset plant state coefficient, and the prediction result based on a preset evaluation function; determining the health state of the target plant based on the evaluation function value and a preset evaluation function value range; adjusting the hierarchical irrigation strategy of the target plant based on the health state; By monitoring the growth state of plants through wearable flexible sensors and cooperating with environmental monitoring data, accurately judge the growth and health state of plants, and implement hierarchical water and fertilizer integrated irrigation, which reduces resource waste while improving production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of a plant water and nutrient regulation system provided by an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a flexible wearable sensor provided by an embodiment of the present invention; Figure 3 It is a schematic structural diagram of a water and fertilizer integrated feedback irrigation device provided by an embodiment of the present invention; Figure 4 It is a flowchart of a method for regulating plant water and nutrients based on a flexible wearable sensor provided by an embodiment of the present invention; Figure 5 It is a schematic structural diagram of a device for regulating plant water and nutrients based on a flexible wearable sensor provided by an embodiment of the present invention; Figure 6Schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0017] Icons: 1 - Flexible wearable sensor; 2 - Environmental monitoring sensor; 3 - Data receiver; 4 - Cloud server; 5 - Monitoring terminal; 6 - Water and fertilizer integrated feedback irrigation device; 11 - Resistor meter; 12 - Flexible sensor; 100 - Charging interface; 110 - Indicator light; 120 - Reset and zero button; 130 - Flexible material; 140 - First fixator; 150 - Second fixator; 160 - Data line; 170 - Male banana plug; 180 - Female banana plug; 310 - Control cabinet; 320 - Solenoid valve; 330 - Water pump; 340 - Liquid storage tank; 350 - Stirring barrel; 400 - Fixator; 420 - Irrigation water pipe; 510 - Stem diameter change data determination module; 520 - Environmental data determination module; 530 - Health status prediction module; 540 - Evaluation function value determination module; 550 - Health status determination module; 560 - Irrigation strategy determination module; 600 - Memory; 601 - Processor; 602 - Bus; 603 - Communication interface. Detailed implementation manners

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and illustrated herein generally may be arranged and designed in a variety of different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0022] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Smart agriculture is the advanced stage of agricultural development from digitization to networking and then to intelligence, and has become the trend of modern agricultural development. Sensing technology plays an important role in smart agriculture and is the key and core of smart agriculture. Traditional agricultural sensors are usually rigid and lack flexibility, which easily hinders the growth of plants and may even damage plants, unable to meet the requirements of modern agriculture for long-term, in-situ, fixed-point and continuous monitoring of plant physiological information. Flexible sensors have received extensive attention due to their excellent flexibility, ductility and biocompatibility, and have been applied to laboratory plant phenotype data monitoring, micro-environmental climate data monitoring, etc.

[0025] In the context of the rapid development of smart agriculture, the integration of water and fertilizer with automatic irrigation devices has become an important technical means for modern agricultural production. The method provided by the present invention integrates water and fertilizer supply and management, and uses advanced sensors and automation control technologies to accurately control the irrigation and fertilization amounts according to the growth needs of crops and soil environmental conditions. This refined management not only improves the utilization efficiency of water and fertilizer, reduces resource waste by precisely delivering water and nutrients to the roots of crops, but also promotes the healthy growth of crops, increases yield and quality. In addition, the automation characteristics of this method greatly reduce the manual labor intensity and improve agricultural production efficiency. Moreover, it helps to improve the soil structure, avoid soil compaction and salinization, maintain soil fertility and ecological balance, reduce environmental pollution caused by water and fertilizer loss, and reduce the risk of eutrophication of groundwater and surface water, thereby promoting the sustainable development of agriculture and achieving a win-win situation of economic and ecological benefits. In the case of frequent agricultural droughts caused by global warming, the integration of water and fertilizer with automatic irrigation devices can achieve precise irrigation, effectively save water and fertilizer, reduce environmental pollution, and provide strong support for the sustainable development of agriculture. It is one of the important ways to realize agricultural modernization in the era of smart agriculture.

[0026] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0027] Embodiment 1 The present invention provides a method for regulating plant water and nutrients based on a flexible wearable sensor, which is applied to a plant water and nutrient regulation system. Refer to Figure 1 the structural schematic diagram of a plant water and nutrient regulation system provided by an embodiment of the present invention as shown, and the system includes: a flexible wearable sensor 1, an environmental monitoring sensor 2, a monitoring terminal 5, and a water and fertilizer integrated feedback irrigation device 6.

[0028] Furthermore, in some preferred embodiments of the present invention, refer to Figure 2 the structural schematic diagram of a flexible wearable sensor provided by an embodiment of the present invention as shown. The flexible wearable sensor 1 includes: a flexible sensor 12 and a resistor 11; the flexible sensor 12 includes: a flexible material 130 and a data line 160; the flexible material 130 is wound around the stem of the target plant; both ends of the flexible material 130 are connected to the resistor 11 through the data line 160.

[0029] Specifically, the flexible material 130 forms the middle part of the flexible sensor 12 and is wound around the stem of the plant to be measured. Both ends of the flexible material 130 are data lines 160, and the end of the data line 160 is connected to the resistor 11 through a banana plug (a commonly used quick-connect plug for wires).

[0030] Further, the resistometer 11 includes a wireless module, a power module, a detection module, and a resistometer 11 housing.

[0031] Among them, the wireless module is located at the center of the circuit board and can be used to wirelessly transmit the received data to the data receiver. The power module also includes a Type-C interface. The Type-C interface is responsible for the download and serial port debugging functions of the resistometer 11 and also needs to provide a voltage such as +5V to the power module. This module enables the resistometer 11 to use a storage battery when moving. The detection module is used to detect the received signal. The resistometer 11 housing is a protective case for protecting the internal resistance measurement circuit, including connection ports for connecting the measurement banana plugs and the power supply, as well as an indicator light 110 and a reset zero button 120. The indicator light 110 can indicate various different states of the resistometer 11, and the reset zero button 120 switch functions to reset, turn on, and turn off the resistometer 11. The design of the housing takes into account portability and durability to adapt to different usage environments.

[0032] Further, the data lines 160 at both ends of the flexible material 130, the male banana plug 170, and the female banana plug 180 are circuit-connected to the resistometer 11.

[0033] Specifically, the resistometer 11 and the data line 160 are circuit-connected to both ends of the resistometer 11 through banana plugs, which can be stably connected and easily plugged and unplugged, and waterproof protection is provided for the connection.

[0034] In the embodiment of the present invention, the monitoring terminal 5 can directly obtain data from the flexible wearable sensor 1 and the environmental monitoring sensor 2; in some preferred embodiments of the present invention, the system further includes: a data receiver 3 and a cloud server 4. The flexible wearable sensor 1 and the environmental monitoring sensor 2 send the data to the data receiver 3, and the data receiver 3 sends the data to the cloud server 4 through, for example, a 4G network base station. The user accesses the cloud server 4 through the monitoring terminal 5 to obtain the data, and can further obtain the data of the flexible wearable sensor 1 and the environmental monitoring sensor 2 through a human-computer interaction method.

[0035] The data receiver is a data gateway, and the resistometer 11 is signal-connected to the data receiver and is used to send the sampled value measured by the stem diameter detection device to the data receiver. The data receiver is signal-connected to the network and is used to send the sampled value to the network. The network is signal-connected to the monitoring terminal 5 and is used to send the sampled value to the cloud server 4.

[0036] The data line 160 obtains the sampling value (AD value) of the flexible wearable strain sensor through the resistor 11. The wireless module of the resistor 11 transmits data to the data receiver 3 via Bluetooth. The data receiver 3 sends the data to the cloud server 4 through, for example, a 4G network base station. The user accesses the cloud server 4 through the monitoring terminal 5 to obtain the data, and can further obtain the dynamic data of the plant stem growth through a human-computer interaction method.

[0037] The cloud server 4 scans the data packets within the coverage range through the built-in wireless transmission device (2.4G radio frequency) antenna, obtains the data packets from the resistor 11, and performs parsing and storage. The data receiver can integrate the data packets within a period of time according to a preset reporting interval and report them to the network wirelessly, such as in a 4G manner or wired, through the UDP network protocol. The monitoring terminal 5 can be any suitable monitoring terminal 5. In a specific embodiment of the present invention, the monitoring terminal 5 is a computer terminal. Setting the data receiver 3 can improve the stability of data transmission, and storing the data in the cloud server 4 can improve the reusability of the data and the convenience of retrieving the data.

[0038] In some preferred embodiments of the present invention, the flexible sensor 12 includes: a first fixator 140 and a second fixator 150; both the first fixator 140 and the second fixator 150 are connected to the flexible material 130, and the first fixator 140 and the second fixator 150 are attracted to each other through the built-in magnets, so that the flexible material 130 is wound and fixed on the stem of the plant.

[0039] In some preferred embodiments of the present invention, the first fixator 140 and the second fixator 150 are of a plastic shell structure, with a magnet built-in, which can attract each other to fix the flexible electrode, making it form a ring around the stem of the plant. The weight of the magnet should not be higher than 5g to avoid excessive load on plant growth. Through the magnetic adsorption of the two fixators 400, it not only has better repeatability, but also keeps the fixing position of the flexible electrode unchanged each time, generating more stable data during stretching.

[0040] Specifically, the flexible material 130 can be fixed through the first fixator 140 and the second fixator 150.

[0041] Further, in some preferred embodiments of the present invention, the first fixator 140 is a plastic handle for one end of the flexible sensor 12, protecting the wire interface from wind and rain erosion. It is equipped with an openable and closable flap, and there is an empty area below the flap with enough space to accommodate and closely fit with a flexible sensor 12. When the flap is opened, the flexible sensor 12 can be put in, and when the flap is closed, the flexible sensor 12 can be locked by the opening and closing mechanism, finally realizing the position fixation of the flexible sensor 12. The second fixator 150 is a plastic handle for fixing one end of the flexible sensor 12 and protecting the wire interface from wind and rain erosion. This fixing method starts from one end of the sensor, pulls different lengths for detection, and this fixing form has better linearity when obtaining detection signals; using this fixing method, the effective length of the sensor can be adjusted when the detection object grows beyond the range to adjust the detection range, and it can be applied to the large-span detection of fruits from small to large without replacing sensors of different lengths; compared with other fixing methods, this method can accurately control the effective length of the sensor, which helps to inversely deduce the actual length according to the resistance.

[0042] In some preferred embodiments of the present invention, the resistor 11 is fixed on the bamboo stick with a cable tie, the flexible material 130 of the flexible sensor 12 is tied to the stem of the plant to be measured, and the first fixator 140 and the second fixator 150 are opened and adjusted to a position where the flexible material 130 will not slide off the stem, and then the fixator 400 is closed for fixation.

[0043] Further, the flexible wearable sensor 1 further includes: a charging interface 100, an indicator light 110, and a reset zero button 120; the resistor 11 can be charged by connecting the charging interface 100 with a Type-C data cable 160. When the Type-C interface is plugged in, the indicator light 110 emits a red light, and when it is fully charged, the light of the indicator light 110 goes out. Use a sharp object to poke the reset zero button 120 of the resistor 11 until the indicator light 110 emits a red light, which means it is powered on.

[0044] Further, in some preferred embodiments of the present invention, the environmental monitoring sensor 2 includes: a soil humidity sensor, a light intensity detection sensor, a temperature sensor, etc., for obtaining environmental factors of the plant environment, such as: soil humidity, light intensity, temperature, etc.

[0045] See Figure 3Schematic diagram of the structure of a water and fertilizer integrated feedback irrigation device provided by an embodiment of the present invention. The control cabinet 310 integrates a variety of sensors, including temperature, humidity, light, soil moisture, etc., for real-time monitoring of greenhouse environmental parameters. In some preferred embodiments of the present invention, a data processing unit is provided inside the control cabinet 310, which can receive instructions given by data analysis software and manually or automatically select the irrigation amount, irrigation time, and nutrient solution ratio for irrigation. The control cabinet 310 is connected to the irrigation device, so it can automatically turn on or off the irrigation device according to the instructions to achieve precise irrigation. The control cabinet 310 has a remote monitoring function, and managers can view environmental data in real time through terminals such as mobile phones and computers and perform manual intervention.

[0046] Furthermore, the water and fertilizer integrated irrigation device includes a solenoid valve 320, a water pump 330, a liquid storage tank 340, a mixing barrel 350, and an irrigation water pipe 420.

[0047] For the solenoid valve 320, when it is energized, the valve stem is lifted by electromagnetic force and the pilot valve port is opened. At this time, the upper cavity of the solenoid valve 320 is depressurized through the pilot hole, and a pressure difference with a lower part and a higher upper part is formed around the main valve core. Under the action of the pressure difference, the fluid pressure pushes the main valve core upward to open the main valve port; when it is de-energized, under the action of the spring force and the gravity of the main valve core, the valve stem resets, the pilot hole closes, the main valve core moves downward, and the main valve port closes; the pressure in the upper cavity of the solenoid valve 320 increases, and the fluid pressure pressurizes the main valve core, resulting in better sealing.

[0048] The exposed diameter at the top of the water pump 330 is 28 - 29 mm, the overall height is 168 - 169 mm, the ejection height is 100 - 102 mm, and the net weight is 0.130 - 0.135 Kg. The working pressure of the water pump 330 is 0.17 - 0.38 MPa, the flow rate is 0.12 - 1.04 m3 / h, the range is 4.6 - 10.7 m, the spraying angle adjustment range is 40° - 360°, and the interface is a 4 - minute internal thread interface.

[0049] The liquid storage tank 340 is a flat-bottomed barrel with a capacity of 299.7 - 300.1 L. The bottom diameter of the flat-bottomed barrel is 499 - 500 mm, the vertical height is 1508 - 1510 mm, the total height is 1598 - 1600 mm, the outer diameter is 229 - 230 mm, the inner diameter is 208 - 210 mm, and the crossbeam is 678 - 680 mm × 74 - 75 mm. It is used to store different liquid fertilizers, such as nitrogen fertilizers, potassium fertilizers, and phosphorus fertilizers, etc. Regarding the selection of specific fertilizers, for nitrogen fertilizers: Liquid fertilizers are used, and urea can be selected. This is one of the most widely used nitrogen fertilizers at present, suitable for various crops and soil types. Its chemical formula is CO(NH2)2, with a nitrogen content of approximately 46%. The commonly used concentration of the liquid fertilizer is 0.5% - 1%. The preparation method is to add 0.5 - 1 kg of urea to 100 kg of water, and different ratio concentrations of fertilizers can be selected according to different crops. For phosphorus fertilizers: Liquid fertilizers are used, and superphosphate can be selected. This is a commonly used phosphorus fertilizer, suitable for various soils and crops. Its chemical formula is , with a phosphorus content (calculated as P2O5) of approximately 12%. The commonly used concentration is 1% - 3%. The preparation method is to mix superphosphate with 10 times the amount of water, stir and let it stand overnight, then take the supernatant and dilute it to the required concentration according to different crops. For potassium fertilizers: Liquid fertilizers are used, and potassium chloride is often selected in agricultural production, suitable for a variety of crops. Its chemical formula is KCl, with a potassium content (calculated as K2O) of approximately 60%. The commonly used concentration of potassium chloride water fertilizer is 0.5% - 1%. The preparation method is to dissolve potassium chloride (KCl) in water and stir evenly. For example, dissolve 1 kg of potassium chloride in 100 kg of water to obtain a 1% potassium chloride solution.

[0050] The stirring barrel 350 is a flat-bottomed barrel with a capacity of 199.6 - 200.3 L. The bottom diameter of the flat-bottomed barrel is 400 - 450 mm, the vertical height is 1400 - 1500 mm, the total height is 1600 - 1700 mm, the outer diameter is 240 - 260 mm, the inner diameter is 220 - 240 mm, and the crossbeam is 300 - 320 mm × 50 - 60 mm.

[0051] The irrigation water pipe is a sun-resistant and anti-aging PE pipe. The diameter of the irrigation water pipe is 40 mm and the length is 10 m.

[0052] The control cabinet 310 provided in the embodiment of the present invention integrates a variety of sensors, including temperature, humidity, light, soil moisture, etc., for real-time monitoring of greenhouse environmental parameters. A data processing unit is provided in the control cabinet 310, which can receive instructions given by the data analysis software and manually or automatically select the irrigation amount, irrigation time, and nutrient solution ratio for irrigation. Since the control cabinet 310 is connected to the irrigation device, it can automatically open or close the solenoid valve 320 and the water pump 330 connected to the irrigation device according to the instructions, realizing precise irrigation. The solenoid valve 320 opens when powered on, allowing water to flow through, and closes when powered off, cutting off the water flow. The water pump 330 transports the water in the liquid storage tank 340 to the mixing barrel 350 according to the working pressure and flow requirements, and then transports it to the irrigation belt, and finally drip-irrigates into the soil of the cultivation tank, realizing uniform irrigation. This integrated water and fertilizer irrigation device supports multiple liquid storage tanks 340, which can store different nutrient solutions, such as phosphorus-containing nutrient solutions, nitrogen-containing nutrient solutions, etc. When the model predicts that the plant shows symptoms of nutrient deficiency or water shortage, the irrigation device can be remotely controlled to mix the liquids in one or more liquid storage tanks 340 evenly in the mixing barrel 350 and then irrigate through the irrigation water pipe 420 to meet the different needs of the plant for single or mixed nutrient deficiency. The entire system supports remote monitoring. Managers can view the environmental data in real time through terminals such as mobile phones and computers, and perform manual intervention when necessary to ensure that the plants obtain appropriate amounts of water and nutrients, optimize the growth environment, improve the water resource utilization efficiency, and at the same time reduce the manual management cost. The integrated water and fertilizer feedback irrigation device 6 provided in the embodiment of the present invention can perform precise irrigation according to the physical changes of the plant stems and the actual water and nutrient requirements through intelligent and automated technologies, effectively saving water resources, improving the farmland management efficiency, and reducing the labor intensity of farmers. The automatic control function reduces manual intervention, reduces the labor cost, and at the same time improves the yield and quality of agricultural products. In addition, the integrated water and fertilizer feedback irrigation device 6 is environmentally friendly, helps to adapt to climate change, and promotes the sustainable development of agriculture. In the long run, it can bring economic benefits of water saving, increased yield and quality, and is an important tool for realizing agricultural modernization and green development.

[0053] See Figure 4 The flowchart of a method for regulating plant water and nutrients based on a flexible wearable sensor provided in the embodiment of the present invention as shown, the method includes: Step S102, obtaining the stem diameter change data of the target plant based on the flexible wearable sensor 1.

[0054] Specifically, the flexible wearable sensor 1 is wrapped around the stem of the target plant. The middle section of the flexible wearable sensor 1 is the flexible material 130. When the stem thickens or thins, it will cause a change in the resistance of the flexible material 130. Measuring the resistance value can correspondingly determine the stem diameter change data of the plant, and upload it to the monitoring terminal 5 or the cloud server 4.

[0055] Step S104: Obtain the environmental data of the environment where the target plant is located based on the environmental monitoring sensor 2; wherein, the environmental data includes at least one of the following: soil humidity, light intensity, and temperature.

[0056] Specifically, upload environmental factors such as soil humidity, light intensity, and temperature to the monitoring terminal 5 or the cloud server 4.

[0057] Step S106: The monitoring terminal 5 inputs the stem diameter change data and the environmental data within the target time period into the pre-trained integrated water and fertilizer feedback irrigation model, and outputs a prediction result; wherein, the end point of the target time period is the current moment, and the length is a preset duration; the prediction result indicates whether the target plant is short of water and / or lacks elements.

[0058] Specifically, click on the plant of the target experimental group in the data analysis software of the computer terminal, select a specific date range (target time period) to download the sampled values of the stem diameter change transmitted back by the stem diameter detection device. In addition, it is necessary to record the environmental factors feedback by the feedback irrigation device, such as relevant data of soil humidity, light intensity, temperature, and relative humidity. The collected data needs to be preprocessed and feature extracted. Features that have a significant impact on the stem diameter change can be extracted, such as the daily maximum shrinkage, daily growth, and the recovery time of the daily maximum stem diameter. In the preparation stage, use the random forest machine learning algorithm in the software to train the preprocessed data. The goal is to establish an integrated water and fertilizer feedback irrigation model that can predict the element deficiency and water shortage status of plants based on the stem diameter change and environmental factors. Evaluate the performance of the model through cross-validation and the test set. According to the prediction result of the integrated water and fertilizer feedback irrigation model, formulate a corresponding irrigation plan. Transmit the instruction to the data analysis software to control the subsequent integrated water and fertilizer irrigation equipment. In some preferred embodiments of the present invention, if the model predicts that the plant is in a state of water shortage or element deficiency, the automatic irrigation system can be started, and the irrigation time, irrigation amount, and irrigated nutrient solution can be adjusted according to the soil humidity and the water demand of the plant.

[0059] Step S108: Determine the evaluation function value of the target plant based on the stem diameter change data, environmental data, pre-set plant state coefficient, and prediction result based on the pre-set evaluation function.

[0060] Specifically, the evaluation function can be determined based on experience, and the evaluation function value can also be judged by experience.

[0061] Further, in some preferred embodiments of the present invention, the evaluation function is constrained by the element deficiency index and the water shortage index.

[0062] Specifically, it combines the stem diameter change data (D), environmental factors (such as soil moisture S, light intensity L, temperature T, etc.), and the prediction results (M) of the machine learning model. Let a, b, c, and d represent the coefficients of water shortage, nitrogen deficiency, phosphorus deficiency, and potassium deficiency respectively, all of which are constant values obtained by correcting based on the long-term usage rules of the flexible wearable sensor 1 and are used to represent the tolerance of different species to different symptoms. Exemplarily, the abcd coefficients of tomatoes are 0.5, 0.8, 0.2, and 0.4 respectively.

[0063] The evaluation function is as follows: F(D, S, L, T, M)=A + B; Among them, F(D, S, L, T, M) is the evaluation function; A is the nutrient deficiency index; B is the water shortage index.

[0064] Further, in some preferred embodiments of the present invention, the nutrient deficiency index is constrained by the following formula: A = {(a + b)×(3f1(D)+f2(S))+(b + c + d)×f1(D)}×f3(L)×f4(T)×f5(M); where A is the nutrient deficiency index; a is the water shortage coefficient; b is the nitrogen deficiency coefficient; c is the phosphorus deficiency coefficient; d is the potassium deficiency coefficient; f1(D) is the stem diameter change data function; f2(S) is the soil moisture function; f3(L) is the light intensity function; f4(T) is the temperature function; f5(M) is the prediction result function.

[0065] Further, in some preferred embodiments of the present invention, the water shortage index is constrained by the following formula: B = {a(4f1(D)+f2(S))×f3(L)}×f4(T)×f5(M); where B is the water shortage index; a is the water shortage coefficient; f1(D) is the stem diameter change data function; f2(S) is the soil moisture function; f3(L) is the light intensity function; f4(T) is the temperature function; f5(M) is the prediction result function.

[0066] Specifically, f1(D) is the stem diameter change data function, representing the impact of the stem diameter change on the plant's water status. f2(S) is the soil moisture function, representing the impact of soil moisture on the plant's water status. f3(L) is the light intensity function, representing the impact of light on the plant's nutrient absorption. f4(T) is the temperature function, representing the impact of temperature on the plant's growth. f5(M) is the function of the prediction result of the machine learning model, representing the model's prediction of the plant's water shortage or nutrient deficiency. By combining the machine learning model with the previous experience of growing this type of crop, the accuracy of the function calculation result is improved.

[0067] Further, in some preferred embodiments of the present invention, f1(D), f2(S), f3(L), f4(T), and f5(M) are determined by the following formula: ; ; ; ; 。

[0068] Among them, D is the data of stem diameter change; S is the soil humidity; L is the light intensity; T is the temperature; M is the prediction result.

[0069] Step S110, determine the health status of the target plant based on the evaluation function value and the preset evaluation function value range.

[0070] Specifically, the health status of the plant is divided into three levels, corresponding to different evaluation function value ranges respectively, as shown in Table 1 for details.

[0071] Table 1

[0072] Step S112, adjust the hierarchical irrigation strategy of the target plant based on the health status.

[0073] Specifically, when A > B, F is driven by nutrient deficiency. If a warning appears, it is dominated by nutrient deficiency; when A < B, F is driven by water shortage. If a warning appears, it is dominated by water shortage.

[0074] According to the evaluation function threshold and the specific deficiency types predicted by the model (water shortage, nitrogen deficiency, phosphorus deficiency, potassium deficiency), dynamically adjust the strategy: (1) Water shortage-dominated type (F value is driven by water shortage).

[0075] ① Mild water shortage strategy: Increase the irrigation frequency to 2 times a day, and maintain the single drip irrigation flow rate at the standard amount (such as 2 L / h for 1 hour).

[0076] Continuously track the stem diameter recovery rate. If it does not recover to within ±5% of the baseline within 24 hours, upgrade to the moderate strategy.

[0077] ② Moderate water shortage strategy: Increase the irrigation frequency to 3 times a day, and increase the single drip irrigation flow rate to 120% of the standard amount (such as 2.4 L / h for 1 hour).

[0078] Linkage fertilization: If the soil humidity S > 15%, synchronously add a balanced nutrient solution (N-P-K ratio 1:1:1), with a drip irrigation flow rate of 1 L / h for 30 minutes.

[0079] ③ Severe water shortage strategy: Immediately perform pulsed drip irrigation (300% of the standard amount per single time, such as 6 L / h for 1 hour), and then switch to the high-frequency low-volume mode (1 L / h for 6 hours).

[0080] Emergency measures: Activate the standby water storage system, prioritize ensuring root zone infiltration, and avoid surface runoff.

[0081] (2) Element deficiency - dominated type (F value driven by element deficiency).

[0082] ① Nitrogen deficiency (model prediction): Apply additional urea solution (concentration 1.5%), drip irrigation flow rate is 1.5 L / h for 1 hour. Immediately after fertilization, perform drip irrigation at 1 L / h for 30 minutes to promote nitrogen dissolution and root absorption.

[0083] Stop topdressing when the daily increment of stem diameter ΔD ≥ 0.1 mm.

[0084] ② Phosphorus deficiency (model prediction): Spray clear superphosphate solution (diluted to 2%), drip irrigation flow rate is 2 L / h for 1 hour. Increase the single - drip irrigation flow rate to 1.2 L / h for 1 hour to improve the phosphorus migration efficiency in the soil. Stop when the daily increment of stem diameter ΔD ≥ 0.132 mm.

[0085] ③ Potassium deficiency (model prediction): Drip - irrigate potassium chloride solution (concentration 1.2%) at the root, drip irrigation flow rate is 1.8 L / h for 1 hour. Maintain soil humidity S ∈ [20%, 30%] to avoid drought inhibiting potassium ion activity. Stop when the daily increment of stem diameter ΔD ≥ 0.117 mm.

[0086] (3) Composite deficiency (water shortage + element deficiency, note the priority: first replenish water, then replenish fertilizer, to prevent damage to roots due to excessive nutrient concentration).

[0087] ① Perform drip irrigation according to the severe water shortage strategy (6 L / h for 1 hour) until S > 18%.

[0088] ② According to the dynamic ratio calculated by the model (such as N:P:K = 3:1:2), mix the nutrient solution in the mixing storage tank 340, and synchronously apply it at 80% of the standard amount, drip irrigation flow rate is 1.5 L / h for 1 hour.

[0089] ③ Detect D and S every 2 hours. If the decline rate of the F value < 10% / h, apply additional chelated micronutrient fertilizer (such as EDTA - Fe), drip irrigation flow rate is 0.5 L / h for 30 minutes.

[0090] Furthermore, in some preferred embodiments of the present invention, dynamic feedback and strategy optimization can be achieved; Real - time data - driven: Monitor the change trend of the F value through data analysis software. If the expected effect is not achieved in 3 consecutive evaluations, automatically trigger strategy upgrade (such as from medium - level adjustment to severe - level). Model iteration: Retrain the random forest model monthly, incorporating the latest environmental data and crop response records to improve the prediction accuracy. When sensor data is abnormal (such as D mutation > 20%), initiate the manual review process to avoid abnormal handling and operation errors.

[0091] In the embodiments of the present invention, for the deficiency-dominated situation, it is mainly analyzed through the prediction results. In some preferred embodiments of the present invention, if it is deficiency-dominated, the trace element sensor can be further activated to extract the sap of the target plant to further judge the deficiency.

[0092] The flexible material 130 of the flexible wearable strain sensor is used to wind around the stem of the plant to be monitored. The first fixator 140 and the second fixator 150 can be opened and moved to adjust the length of the flexible material 130. The data line 160 is connected to the resistor 11 through a banana head circuit. The resistor 11 obtains the sampling value (AD value) of the flexible wearable strain sensor. The wireless module of the resistor 11 transmits the data to the data receiver 3 through Bluetooth. The data receiver 3 sends the data to the cloud server 4 through, for example, a 4G network base station. The user accesses the cloud server 4 through the monitoring terminal 5 to obtain the data, and can further obtain the dynamic growth data of the plant stem through a human-computer interaction method. Compared with detecting the soil moisture content through a soil sensor, the method provided by the embodiments of the present invention combines the Rongxin wearable sensor to detect the physical changes of the plant stem, and cooperates with environmental factors to monitor the actual growth status of the plant to determine whether watering or supplementing trace elements is needed, more precisely meeting the water and nutrient requirements of the plant and helping the plant absorb nutrients better.

[0093] The flexible wearable sensor 1 provided by the embodiments of the present invention monitors the water status of the plant in real time, and can monitor the expansion and contraction of the plant stem in real time, so as to evaluate the water status of the plant. By measuring the micro-displacement change of the plant stem to evaluate the water status of the plant, compared with the soil sensor, it provides more direct information on the physiological response of the plant.

[0094] The embodiments of the present invention have a low cost and are easy to install. Compared with soil sensors, this low-cost and easy-to-install characteristic makes them more advantageous in large-scale applications.

[0095] The data provided by the embodiments of the present invention is directly related to the physiological state of the plant. The data provided by the soil sensors in the prior art may require further interpretation and conversion to be used to guide plant watering.

[0096] The system and method provided by the embodiments of the present invention use less power, have a simple structure, and are easy to carry. When used in the wild environment, a storage battery can be selected to achieve long-term power supply.

[0097] The embodiments of the present invention can be used for different plants, and can also be used to detect the change of the stem diameter of plants in different environments.

[0098] The integrated water and fertilizer irrigation equipment provided by the embodiments of the present invention can accurately provide an appropriate amount of water and fertilizer according to the actual needs of plants for water and nutrients at different growth stages. With the help of flexible wearable sensors 1, environmental monitoring sensors 2, and machine learning, key indicators such as soil humidity, nutrient content, and the physiological state of plants can be monitored in real time, so as to accurately calculate the proportion and dosage of water and fertilizer required by plants, avoiding the common problems of overuse or insufficiency in traditional irrigation and fertilization methods, and ensuring that plants are always in the best growth state. It can evenly deliver water and fertilizer to the roots of plants, enabling plants to fully absorb nutrients, improving fertilizer utilization efficiency, promoting the balanced growth of plants, reducing growth differences caused by uneven nutrient distribution, and thus enhancing the overall quality and yield of agricultural products.

[0099] Compared with the traditional irrigation method, the integrated water and fertilizer feedback irrigation equipment adopts efficient water-saving irrigation technology, which can significantly improve the water use efficiency. It accurately controls the irrigation water volume, making the water directly act on the plant roots, reducing the evaporation and leakage losses of water during the transportation process, and having a good water-saving effect. At the same time, during the operation of the system, the operating power of the irrigation and fertilization equipment can be automatically adjusted according to the actual needs, reducing energy consumption and achieving energy conservation and emission reduction. The precise fertilization function enables fertilizers to be efficiently absorbed by plants, reducing fertilizer waste and loss, and also reducing soil pollution and water eutrophication problems caused by excessive fertilization, realizing the sustainable development of agricultural production.

[0100] With the help of the Internet of Things technology, users can remotely monitor and control the system at any time and place through terminal devices such as mobile phones and computers, that is, view the real-time data of the soil and plants, remotely start or stop the irrigation and fertilization operations, without the need for on-site manual attendance, greatly saving labor costs and improving management efficiency, especially suitable for the management of large-scale farmland and modern agricultural parks. It has a powerful automatic feedback adjustment function and can automatically adjust the irrigation and fertilization strategies according to the real-time monitoring data.

[0101] Through precise water and fertilizer supply, a more stable and suitable growth environment is created for plants. Stable water and nutrient supply contribute to the healthy growth of plant roots, enhance the stress resistance and immunity of plants, and reduce the occurrence of diseases and pests. At the same time, a good growth environment can also promote the photosynthesis and nutrient absorption of plants, enabling plants to better accumulate nutrients, thereby improving the quality and yield of agricultural products.

[0102] Precision fertilization avoids soil pollution caused by excessive fertilizers and reduces the risks of soil salinization and acidification. Meanwhile, reasonable irrigation volume reduces the damage of water to soil structure, helps maintain soil fertility and ecological balance, and provides a good soil environment for the long-term growth of plants. Reducing fertilizer loss is an important measure to prevent water eutrophication. The intelligent water and fertilizer integrated feedback irrigation system effectively reduces the inflow of nutrients such as nitrogen and phosphorus into water bodies such as rivers and lakes with irrigation water by precisely controlling the fertilization amount and irrigation volume, protects water resources, maintains the health and stability of the ecological environment, and meets the requirements of green agriculture and sustainable development.

[0103] The present invention provides a method for regulating plant water and nutrients based on a flexible wearable sensor 1, which is applied to a plant water and nutrient regulation system. The plant water and nutrient regulation system includes: a flexible wearable sensor 1, an environmental monitoring sensor 2, a monitoring terminal 5, and a water and fertilizer integrated feedback irrigation device 6. The method for regulating plant water and nutrients based on a flexible wearable sensor 1 includes: obtaining the stem diameter change data of a target plant based on the flexible wearable sensor 1; obtaining the environmental data of the environment where the target plant is located based on the environmental monitoring sensor 2. Among them, the environmental data includes at least one of the following: soil humidity, light intensity, and temperature. The monitoring terminal 5 inputs the stem diameter change data within a target time period and the environmental data within the target time period into a pre-trained water and fertilizer integrated feedback irrigation model to output a prediction result. Among them, the end point of the target time period is the current moment, and the length is a preset duration. The prediction result represents whether the target plant is short of water and / or lacks nutrients. Based on the stem diameter change data, environmental data, a preset plant state coefficient, and the prediction result, determine the evaluation function value of the target plant based on a preset evaluation function. Determine the health status of the target plant based on the evaluation function value and a preset evaluation function value range. Adjust the hierarchical irrigation strategy of the target plant based on the health status. Monitor the growth status of the plant through the wearable flexible sensor 12, and cooperate with the environmental monitoring data to accurately judge the growth and health status of the plant, and implement hierarchical water and fertilizer integrated irrigation, which reduces resource waste while improving production efficiency and product quality.

[0104] Embodiment 2 Based on the above embodiment, the present invention embodiment further describes the flexible material 130. In some preferred embodiments of the present invention, the flexible material 130 includes: an elastic conductive inner core and an elastic insulating outer sheath; the elastic insulating outer sheath is sleeved outside the elastic conductive inner core.

[0105] Furthermore, in some preferred embodiments of the present invention, the elastic conductive inner core is a silk-based conductive carbon fabric inner core; the elastic insulating outer sheath is a polydimethylsiloxane elastic insulating outer sheath or an aliphatic-aromatic random copolyester elastic insulating outer sheath.

[0106] Further, in some preferred embodiments of the present invention, the method further includes: preparing an elastic conductive inner core through the following steps: twisting silk georgette fibers to make warp yarns, making parallel silk georgette fibers into weft yarns, and arranging the warp yarns and weft yarns into a silk fabric; carbonizing the silk fabric at a high temperature in an inert atmosphere to obtain the elastic conductive inner core.

[0107] Further, in some preferred embodiments of the present invention, the thickness of the polydimethylsiloxane elastic insulating outer sheath and the length of the flexible material 130 are constrained based on the following formula: ; where y is the length of the flexible material 130 in centimeters; and x is the thickness of the polydimethylsiloxane elastic insulating outer sheath in millimeters.

[0108] Specifically, the elastic conductive inner core is a silk-based conductive carbon fabric inner core, and the manufacturing process of this inner core is to twist silk georgette fibers to make warp yarns, make parallel silk georgette fibers into weft yarns, and arrange the warp yarns and weft yarns into a silk fabric. Each silk georgette fiber is composed of millions of silk fibroin molecules, and the β-sheet crystals in silk fibroin can be aromatized or cyclized into sp 2Hybrid carbon structure, so silk fibroin is carbonized at high temperature in an inert atmosphere (continuous gas flow with an argon flow rate of 150 standard cubic centimeters per minute and a hydrogen flow rate of 16 standard cubic centimeters per minute), and then can be converted into graphene nano-carbon with good conductivity. The carbonized silk fabric is encapsulated with elastic silica gel of Ecoflex. The elastic insulating outer sleeve is a polydimethylsiloxane (PDMS) elastic insulating outer sleeve or an aliphatic-aromatic random copolyester elastic insulating outer sleeve. After the elastic conductive inner core is prepared, it is placed on a layer of PDMS film, and an alcohol solution of APTES (3-aminopropyltriethoxysilane) is sprayed, and left standing for 3 minutes to wait for the alcohol to completely volatilize. The thickness of the PDMS film is x mm. Limiting the thickness of the PDMS film can better ensure the consistency of signal changes and the stability and stretchability of the overall flexible material 130. The purpose of spraying the alcohol solution of APTES is to form hydrogen bonds between the amino group of APTES and the oxygen-containing functional groups (such as hydroxyl groups, carboxyl groups, etc.) on the surface of the silk-based conductive carbon fabric, so as to achieve the adsorption of APTES on the surface of the silk-based conductive carbon fabric. At the same time, APTES can alkylate the surface of PDMS. The ultimate goal is to achieve the tight combination of the two, improve the bonding degree between the elastic conductive inner core and the elastic insulating outer sleeve, and make the stretching of the two more consistent (that is, to avoid situations similar to degumming). There are two forms of subsequent preparation. One is to add a certain amount (1-2 mL) of PDMS liquid with a curing agent in a fixed mold and bake it at 50 °C for 1.5 hours to make it completely cured. Its advantage is that it can improve consistency, that is, the combination of the two is tighter. The defect is that the thickness processing is prone to inconsistency. It can have a long service life, but it reduces the repeatability of production effects. The other is to add a layer of x mm of solid PDMS, spray the alcohol solution of APTES, and fix it with clips to make the two combine through chemical bonds. Its advantage is that the thickness is consistent. The defect is that the combination is not tight enough, reducing the service life and improving the repeatability of production effects. The length of the finally prepared flexible material 130 is y cm, and the user can choose according to actual needs. Among them, the length and thickness of the flexible material 130 can be calculated according to the formula for calculation. The user can calculate the required thickness of the material to be prepared according to the different sizes of the measured plant objects.

[0109] Example 3 On the basis of the above embodiments, the embodiment of the present invention provides a plant water and nutrient regulation device based on the flexible wearable sensor 1, which is applied to the plant water and nutrient regulation system. The plant water and nutrient regulation system includes: a flexible wearable sensor 1, an environmental monitoring sensor 2, a monitoring terminal 5, and a water and fertilizer integrated feedback irrigation device 6.

[0110] See Figure 5Schematic structural diagram of a plant water and nutrient regulation device provided by an embodiment of the present invention shown, the device comprising: A stem diameter change data determination module 510, configured to obtain stem diameter change data of a target plant based on the flexible wearable sensor 1; An environmental data determination module 520, configured to obtain environmental data of the environment where the target plant is located based on the environmental monitoring sensor 2; wherein, the environmental data includes at least one of the following: soil humidity, light intensity, and temperature; A health status prediction module 530, configured to input the stem diameter change data within a target time period and the environmental data within the target time period into a pre-trained integrated water and fertilizer feedback irrigation model by the monitoring terminal 5, and output a prediction result; wherein, the end point of the target time period is the current moment, and the length is a preset duration; the prediction result represents whether the target plant lacks water and / or lacks nutrients; An evaluation function value determination module 540, configured to determine an evaluation function value of the target plant based on the stem diameter change data, the environmental data, a preset plant status coefficient, and the prediction result based on a preset evaluation function; A health status determination module 550, configured to determine the health status of the target plant based on the evaluation function value and a preset evaluation function value range; A watering strategy determination module 560, configured to adjust the hierarchical watering strategy of the target plant based on the health status.

[0111] Further, in some preferred embodiments of the present invention, the evaluation function is constrained based on a nutrient deficiency index and a water deficiency index.

[0112] Further, in some preferred embodiments of the present invention, the nutrient deficiency index is constrained based on the following formula: A = {(a + b) × (3f1(D) + f2(S)) + (b + c + d) × f1(D)} × f3(L) × f4(T) × f5(M); wherein, A is the nutrient deficiency index; a is the water deficiency coefficient; b is the nitrogen deficiency coefficient; c is the phosphorus deficiency coefficient; d is the potassium deficiency coefficient; f1(D) is the stem diameter change data function; f2(S) is the soil humidity function; f3(L) is the light intensity function; f4(T) is the temperature function; f5(M) is the prediction result function.

[0113] Further, in some preferred embodiments of the present invention, the water deficiency index is constrained based on the following formula: B = {a(4f1(D) + f2(S)) × f3(L)} × f4(T) × f5(M); wherein, B is the water deficiency index; a is the water deficiency coefficient; f1(D) is the stem diameter change data function; f2(S) is the soil humidity function; f3(L) is the light intensity function; f4(T) is the temperature function; f5(M) is the prediction result function.

[0114] Further, in some preferred embodiments of the present invention, the flexible wearable sensor 1 includes: a flexible sensor 12 and a resistor 11; the flexible sensor 12 includes: a flexible material 130 and a data line 160; the flexible material 130 is wound around the stem of the target plant; both ends of the flexible material 130 are connected to the resistor 11 through the data line 160.

[0115] Further, in some preferred embodiments of the present invention, the flexible material 130 includes: an elastic conductive inner core and an elastic insulating outer sheath; the elastic insulating outer sheath is sleeved outside the elastic conductive inner core.

[0116] Further, in some preferred embodiments of the present invention, the elastic conductive inner core is a silk-based conductive carbon fabric inner core; the elastic insulating outer sheath is a polydimethylsiloxane elastic insulating outer sheath or an aliphatic-aromatic random copolyester elastic insulating outer sheath.

[0117] Further, in some preferred embodiments of the present invention, the device further includes: an elastic conductive inner core preparation module for preparing the elastic conductive inner core through the following steps: twisting the silk georgette fibers to make the warp yarns, making the parallel silk georgette fibers into the weft yarns, and arranging the warp yarns and the weft yarns into a silk fabric; carbonizing the silk fabric at a high temperature in an inert atmosphere to obtain the elastic conductive inner core.

[0118] Further, the thickness of the polydimethylsiloxane elastic insulating outer sheath and the length of the flexible material 130 are constrained based on the following formula: ; where y is the length of the flexible material 130 in centimeters; x is the thickness of the polydimethylsiloxane elastic insulating outer sheath in millimeters.

[0119] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the plant water and nutrient regulation device based on the flexible wearable sensor 1 described above can refer to the corresponding process in the embodiment of the plant water and nutrient regulation method based on the flexible wearable sensor 1 described above, and will not be elaborated here.

[0120] Embodiment 4 The embodiment of the present invention also provides an electronic device for running the plant water and nutrient regulation method based on the flexible wearable sensor 1; see Figure 6 the structural schematic diagram of an electronic device provided by the embodiment of the present invention shown in the figure. The electronic device includes a memory 600 and a processor 601. Among them, the memory 600 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor 601 to implement the above-mentioned plant water and nutrient regulation method based on the flexible wearable sensor 1.

[0121] Further, Figure 6The electronic device shown also includes a bus 602 and a communication interface 603. The processor 601, the communication interface 603, and the memory 600 are connected through the bus 602.

[0122] Among them, the memory 600 may include a high-speed random access memory 600 (RAM, Random Access Memory), and may also include a non-volatile memory 600, such as at least one disk memory 600. The communication connection between this system network element and at least one other network element is realized through at least one communication interface 603 (which can be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. can be used. The bus 602 can be an ISA bus 602, a PCI bus 602, or an EISA bus 602, etc. The bus 602 can be divided into an address bus 602, a data bus 602, a control bus 602, etc. For the sake of simplicity of representation, Figure 6 only a single bidirectional arrow is used in the figure, but it does not mean that there is only one bus 602 or one type of bus 602.

[0123] The processor 601 may be an integrated circuit chip with the ability to process signals. In the implementation process, each step of the above method can be completed by the integrated logic circuit in the hardware of the processor 601 or instructions in the form of software. The above-mentioned processor 601 may be a general-purpose processor 601, including a central processing unit 601 (CPU for short), a network processor 601 (NP for short), etc.; it may also be a digital signal processor 601 (DSP for short), an application specific integrated circuit (ASIC for short), a field-programmable gate array (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute each method, step, and logic block diagram disclosed in the embodiments of the present invention. The general-purpose processor 601 may be a microprocessor 601 or the processor 601 may also be any conventional processor 601, etc. The steps of the method disclosed in combination with the embodiments of the present invention can be directly embodied as being executed and completed by the hardware decoding processor 601, or can be executed and completed by a combination of the hardware and software modules in the decoding processor 601. The software module may be located in a mature storage medium in the art such as a random access memory 600, a flash memory, a read-only memory 600, a programmable read-only memory 600, or an electrically erasable programmable memory 600, a register, etc. This storage medium is located in the memory 600, and the processor 601 reads the information in the memory 600 and combines its hardware to complete the steps of the method in the foregoing embodiments.

[0124] The embodiments of the present invention also provide a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are called and executed by the processor 601, the computer-executable instructions cause the processor 601 to implement the above-mentioned plant water and nutrient regulation method based on the flexible wearable sensor 1. For the specific implementation, reference can be made to the method embodiments, which will not be elaborated here.

[0125] The computer program product of the plant water and nutrient regulation method, device, and electronic device based on the flexible wearable sensor 1 provided by the embodiments of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method in the foregoing method embodiments. For the specific implementation, reference can be made to the method embodiments, which will not be elaborated here.

[0126] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems and / or devices described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0127] In addition, in the description of the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0128] If the above functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: USB flash drives, mobile hard disks, read-only memory 600 (ROM, Read-Only Memory), random access memory 600 (RAM, Random Access Memory), magnetic disks, or optical discs and other various media that can store program codes.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for regulating plant water and nutrients based on a flexible wearable sensor, characterized in that, Applied to a plant water and nutrient regulation system, the plant water and nutrient regulation system includes: a flexible wearable sensor, an environmental monitoring sensor, a monitoring terminal, and a water and fertilizer integrated feedback irrigation device; the regulation method includes: Obtaining the stem diameter change data of the target plant based on the flexible wearable sensor; Obtaining the environmental data of the environment where the target plant is located based on the environmental monitoring sensor; wherein, the environmental data includes at least one of the following: soil humidity, light intensity, and temperature; The monitoring terminal inputs the stem diameter change data and environmental data within the target time period into a pre-trained water and fertilizer integrated feedback irrigation model, and outputs a prediction result; wherein, the prediction result indicates whether the target plant is short of water and / or lacks nutrients; Determining the evaluation function value of the target plant based on the stem diameter change data, environmental data, a preset plant state coefficient, and the prediction result based on a preset evaluation function; Determining the health status of the target plant based on the evaluation function value and a preset range of evaluation function values; Adjusting the hierarchical irrigation strategy of the target plant based on the health status.

2. The method for regulating plant water and nutrients based on a flexible wearable sensor according to claim 1, wherein The evaluation function is constrained by a nutrient deficiency index and a water deficiency index.

3. The method for regulating plant water and nutrients based on a flexible wearable sensor according to claim 2, wherein, The nutrient deficiency index is constrained by the following formula: A = {(a + b) × (3f1(D) + f2(S)) + (b + c + d) × f1(D)} × f3(L) × f4(T) × f5(M); Wherein, A is the nutrient deficiency index; a is the water deficiency coefficient; b is the nitrogen deficiency coefficient; c is the phosphorus deficiency coefficient; d is the potassium deficiency coefficient; f1(D) is the stem diameter change data function; f2(S) is the soil humidity function; f3(L) is the light intensity function; f4(T) is the temperature function; f5(M) is the prediction result function.

4. The method for regulating plant water and nutrients based on a flexible wearable sensor according to claim 2, characterized in that, The water deficiency index is constrained by the following formula: B = {a(4f1(D) + f2(S)) × f3(L)} × f4(T) × f5(M); Wherein, B is the water deficiency index; a is the water deficiency coefficient; f1(D) is the stem diameter change data function; f2(S) is the soil humidity function; f3(L) is the light intensity function; f4(T) is the temperature function; f5(M) is the prediction result function.

5. The method for regulating plant water and nutrients based on a flexible wearable sensor according to claim 1, wherein The flexible wearable sensor includes: a flexible sensor and a rheostat; the flexible sensor includes: a flexible material and a data line; The flexible material is wound around the stem of the target plant; Both ends of the flexible material are connected to the rheostat through the data line.

6. The method for regulating plant water and nutrients based on a flexible wearable sensor according to claim 5, wherein The flexible material includes: an elastic conductive inner core and an elastic insulating outer sheath; the elastic insulating outer sheath is sleeved outside the elastic conductive inner core.

7. The method for regulating plant water and nutrients based on a flexible wearable sensor according to claim 6, characterized in that, The elastic conductive inner core is a silk-based conductive carbon fabric inner core; The elastic insulating outer sheath is a polydimethylsiloxane elastic insulating outer sheath or an aliphatic-aromatic random copolyester elastic insulating outer sheath.

8. The method for regulating plant water and nutrients based on a flexible wearable sensor according to claim 7, wherein, The method further includes: preparing the elastic conductive inner core through the following steps: Twisting silk georgette fibers to make warp yarns, making parallel silk georgette fibers into weft yarns, and arranging the warp yarns and weft yarns into a silk fabric; High-temperature carbonizing the silk fabric in an inert atmosphere to obtain the elastic conductive inner core.

9. The method for regulating plant water and nutrients based on a flexible wearable sensor according to claim 8, characterized in that, The thickness of the polydimethylsiloxane elastic insulating outer sheath and the length of the flexible material are constrained by the following formula: ； Among them, y is the length of the flexible material, with the unit of centimeter; x is the thickness of the polydimethylsiloxane elastic insulating jacket, with the unit of millimeter.

10. A plant water and nutrient regulation device based on a flexible wearable sensor, characterized in that, Applied to the plant water and nutrient regulation system, the plant water and nutrient regulation system includes: a flexible wearable sensor, an environmental monitoring sensor, a monitoring terminal, and a water and fertilizer integrated feedback irrigation device; the regulation device includes: A stem diameter change data determination module, configured to obtain the stem diameter change data of a target plant based on the flexible wearable sensor; An environmental data determination module, configured to obtain the environmental data of the environment where the target plant is located based on the environmental monitoring sensor; among them, the environmental data includes at least one of the following: soil humidity, light intensity, and temperature; A health status prediction module, configured to input the stem diameter change data and environmental data within a target time period into a pre-trained water and fertilizer integrated feedback irrigation model by the monitoring terminal, and output a prediction result; among them, the prediction result indicates whether the target plant is short of water and / or lacks nutrients; An evaluation function value determination module, configured to determine the evaluation function value of the target plant based on the stem diameter change data, environmental data, a preset plant state coefficient, and the prediction result based on a preset evaluation function; A health status determination module, configured to determine the health status of the target plant based on the evaluation function value and a preset evaluation function value range; A watering strategy determination module, configured to adjust the hierarchical watering strategy of the target plant based on the health status.

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