Tidal Seedling Cultivation Monitoring and Irrigation Decision-Making Method, Device and System

Abstract

The present invention provides a tidal seedling raising monitoring and irrigation decision-making method, device and system. The method includes: after each irrigation ends, through a weighing mechanism, obtaining the saturated weight of the substrate when the plants and the substrate in the cultivation tank reach a stable saturated state, and combining with the initial saturated weight of the substrate when the substrate was saturated with water before planting the plants, calculating the fresh weight of the plants after irrigation; obtaining the real-time weight of the substrate of the whole plants and the substrate through the weighing mechanism, and combining with the fresh weight of the plants and the saturated weight of the substrate, calculating the real-time reference irrigation amount; obtaining the real-time water content of the substrate, and if the real-time water content of the substrate is less than the irrigation threshold, irrigating the seedling tray based on the real-time reference irrigation amount. This method does not require manual frequent measurement, operation and recording, greatly simplifying the on-site monitoring and installation process. By weighing, growth condition parameters such as the weight of the plants can be accurately obtained, solving the problem of difficult online acquisition of crop information, and accurate irrigation can be carried out according to the growth conditions of the plants at different times.

Description

Technical Field

[0001] The present invention relates to the field of crop irrigation, and particularly to a tidal seedling raising monitoring and irrigation decision-making method, device and system. Background Art

[0002] A tidal irrigation system is an efficient water-saving irrigation system designed based on the principle of tidal ebb and flow. It is applicable to the planting and management of various potted plants and can effectively improve the utilization efficiency of water resources and nutrient solutions.

[0003] Currently, during the cultivation process, due to the difficulty in obtaining crop information online, there are problems such as being unable to determine reasonable water and nutrient irrigation points and being uncertain about the absorption amounts of water and nutrients by crops, making it difficult to grasp the growth status of plants in real time; tidal irrigation decisions are mainly based on experience, with different liquid levels adopted at different times and the specific duration being basically judged by experience, resulting in low accuracy. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a tidal seedling raising monitoring and irrigation decision-making method, device and system.

[0005] The present invention provides a tidal seedling raising monitoring and irrigation decision-making method, including: after each irrigation ends, through a weighing mechanism, obtaining the saturated weight of the substrate when the plants and the substrate in the cultivation tank reach a stable and saturated state, and combining with the initial saturated weight of the substrate when the substrate was irrigated to saturation before planting the plants, calculating the fresh weight of the plants after irrigation; obtaining the real-time weight of the substrate of the plants and the substrate through the weighing mechanism, and combining with the fresh weight of the plants and the saturated weight of the substrate, calculating the real-time reference irrigation amount; obtaining the real-time water content of the substrate, and if the real-time water content of the substrate is less than the irrigation threshold, performing seedling tray irrigation based on the real-time reference irrigation amount.

[0006] According to the tidal seedling raising monitoring and irrigation decision-making method of an embodiment of the present invention, the obtaining of the real-time water content of the substrate includes: according to the saturated weight of the substrate and the fresh weight of the plants obtained after each irrigation ends, combining with the real-time weight of the substrate and the dry weight of the substrate, calculating the water content of the substrate.

[0007] According to the tidal seedling raising monitoring and irrigation decision-making method of an embodiment of the present invention, the irrigation threshold is determined according to the saturated weight of the substrate obtained after each irrigation ends and the corresponding irrigation coefficient; wherein, the irrigation coefficient is determined according to the type of seedling tray, the type of seedlings and the seedling stage.

[0008] According to the tidal seedling raising monitoring and irrigation decision-making method of an embodiment of the present invention, after calculating the fresh weight of the plant after irrigation, the method further includes: determining the fresh weight increment according to the fresh weight of the plant at adjacent irrigation times, and combining the duration between adjacent irrigation times to determine the growth rate of the plant; determining the evapotranspiration amount according to the change value of the real-time weight of the substrate obtained by the weighing mechanism per unit time, and combining the unit time to determine the evapotranspiration rate of the plant.

[0009] According to the tidal seedling raising monitoring and irrigation decision-making method of an embodiment of the present invention, after determining the evapotranspiration amount, the method further includes: determining the water use efficiency according to the fresh weight increment of the plant at adjacent irrigation times and the corresponding evapotranspiration amount.

[0010] The present invention also provides a tidal seedling raising monitoring and irrigation decision-making device, including: a fresh weight calculation module, configured to, after each irrigation ends, obtain the saturated weight of the substrate when the plants and the substrate in the cultivation tank reach a stable saturated state through a weighing mechanism, and combine the initial saturated weight of the substrate when the substrate was irrigated and saturated before planting the plants to calculate the fresh weight of the plants after irrigation; a water volume calculation module, configured to obtain the real-time weight of the substrate of the plants and the substrate through the weighing mechanism, and combine the fresh weight of the plants and the saturated weight of the substrate to calculate the real-time reference irrigation water volume; an irrigation processing module, configured to obtain the real-time water content of the substrate, and if the real-time water content of the substrate is less than the irrigation threshold, perform seedling tray irrigation based on the real-time reference irrigation water volume.

[0011] The present invention also provides a tidal seedling raising monitoring and irrigation decision-making system, including: a weighing mechanism, a load-bearing mechanism, a cultivation plug tray, a gateway device, and the above-mentioned tidal seedling raising monitoring and irrigation decision-making device; the weighing mechanism is connected to the load-bearing mechanism, the cultivation plug tray is located above the bottom surface of the load-bearing mechanism, and plants are planted in the cultivation plug tray; the weighing mechanism is provided with an antenna module for sending the weight data obtained by the weighing mechanism to the tidal seedling raising monitoring and irrigation decision-making device via the gateway device.

[0012] According to the tidal seedling raising monitoring and irrigation decision-making system of an embodiment of the present invention, the weighing mechanism includes: an upper hook, a lower hook, and a tension sensor; the tension sensor is connected to the bottom load-bearing mechanism through the lower hook; the load-bearing mechanism includes an adjustable cross beam for adjusting the distance between the cross beams to adapt to different sizes of cultivation plug trays; the lower hook is connected to the load-bearing mechanism through a suspension rope, and the length of the suspension rope is adjusted to adapt to different growth heights of the plants.

[0013] The tidal seedling raising monitoring and irrigation decision-making method and device provided by the present invention adopt a weighing monitoring method, which can bring convenience to the monitoring of plants in tidal irrigation, eliminating the need for frequent manual measurement and operation records. Since the weighing sensing device is a low-energy-consuming device, it is in a dormant state most of the time, and has the characteristics of small size and low power consumption, greatly simplifying the on-site monitoring installation process. By weighing, growth condition parameters such as the weight of plants can be accurately obtained, solving the problem of difficult online acquisition of crop information. At the same time, combined with parameters such as the real-time weight of the substrate, accurate irrigation can be carried out for the growth of plants at different times. Brief Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic flow chart of the tidal seedling raising monitoring and irrigation decision-making method provided by the present invention;

[0016] Figure 2 It is a schematic structural diagram of the tidal seedling raising monitoring and irrigation decision-making device provided by the present invention;

[0017] Figure 3 It is a schematic structural diagram of the tidal seedling raising monitoring and irrigation decision-making system provided by the present invention;

[0018] Figure 4 It is a front view of a load-bearing mechanism provided by the present invention;

[0019] Figure 5 It is a schematic structural diagram of a weighing mechanism provided by the present invention;

[0020] Figure 6 It is an application scenario diagram of the tidal seedling raising monitoring and irrigation decision-making system provided by the present invention;

[0021] Figure 7 It is a circuit board chip connection diagram provided by the present invention;

[0022] Figure 8 It is a schematic structural diagram of an electronic device provided by the present invention;

[0023] Explanation of the Reference Numerals:

[0024] 1: weighing mechanism; 2: upper hook; 3: tension sensor;

[0025] 4: lower hook; 5: lifting hook; 6: lifting rope;

[0026] 7: Plant; 8: Load-bearing mechanism; 9: Cultivation tray;

[0027] 10: Gateway; 11: Server; 12: Mobile phone;

[0028] 13: Adjustable load-bearing crossbeam 51: Antenna 52: Display screen. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0030] The following Figures 1-8 describes the tidal seedling raising monitoring and irrigation decision-making method and device of the present invention. Figure 1 is a schematic flowchart of the tidal seedling raising monitoring and irrigation decision-making method provided by the present invention. As Figure 1 shown, the present invention provides a tidal seedling raising monitoring and irrigation decision-making method, including:

[0031] 101. After each irrigation ends, through the weighing mechanism, obtain the saturated weight of the substrate when the plants and the substrate in the cultivation tank reach a stable and saturated state as a whole, and combine it with the initial saturated weight of the substrate when the substrate was saturated with water before planting the plants, and calculate the fresh weight of the plants after irrigation.

[0032] First, based on the weight of the substrate when the tidal irrigation substrate cultivation tank was initially saturated with water and the weight of the substrate in the cultivation tank when it reaches a stable and saturated state after each irrigation ends, calculate the fresh weight of the plants, which is also the growth amount of the plants:

[0033] W f = W w - W d ;

[0034] In the formula, W f represents the fresh weight of the plants, and W w represents the weight of the substrate when it reaches a stable and saturated state after irrigation ends, that is, the weight obtained through the weighing mechanism after all the nutrient solution in the seedbed is drained after irrigation. W d represents the weight of the substrate when it is saturated with water, that is, the weight of the substrate when it is saturated with water before planting the plants. That is to say, before planting the plants, the substrate can be saturated with water first, and W d can be collected first through the weighing mechanism.

[0035] In the embodiment of the present invention, after the corresponding weight is obtained by the weighing mechanism, the weight data can be sent to the remote server via the gateway through the wireless network, and the server performs the corresponding calculations. That is to say, the execution subject of this method can be the server.

[0036] 102. Obtain the real-time weight of the substrate of the whole plant and substrate through the weighing mechanism, and calculate the real-time reference irrigation amount by combining the fresh weight of the plant and the saturated weight of the substrate.

[0037] Water and nutrients in the substrate are essential conditions for plant growth. By monitoring the return liquid parameters, information such as salt content and organic content in the substrate can be determined, and the absorption and utilization of nutrients by plants can be understood. The calculation formula for the irrigation reference amount is as follows:

[0038] I REF =W w -W t +W f

[0039] In the formula, I REF represents the reference irrigation amount, and W t is the real-time weight of the substrate obtained by the weighing mechanism.

[0040] Specifically, it is also the server that performs the corresponding calculations.

[0041] 103. Obtain the real-time water content of the substrate. If the real-time water content of the substrate is less than the irrigation threshold, irrigate the seedling tray based on the real-time reference irrigation amount.

[0042] In one embodiment, the irrigation coefficient N can be determined according to the type of seedling tray, the type of seedlings, and different seedling stages, and then combined with W w *N as the corresponding irrigation threshold. When V≤W w *N, irrigate the seedling tray, where V is the real-time water content of the substrate.

[0043] Correspondingly, it is also the server that performs the corresponding calculations. When the server determines that the real-time water content of the substrate is less than the irrigation threshold, it sends an irrigation signal and the corresponding reference irrigation amount to the irrigation device to achieve irrigation of the seedling tray based on the real-time reference irrigation amount.

[0044] During tidal irrigation, the seedbed rises with water to irrigate the seedlings, and the weight of the substrate increases as it absorbs water until the weight of the seedling cultivation unit increases by I REF , then stop irrigating the seedlings. The seedbed drains, and the reflux nutrient solution takes away the accumulated salt in the seedling tray, and the substrate is leached during each irrigation. The calculation formula when irrigation stops is as follows:

[0045] W t =W n +I REF

[0046] In the formula, W n represents the weight collected by the weighing mechanism when starting to irrigate water.

[0047] The tidal seedling cultivation monitoring and irrigation decision-making method provided by the present invention provides a new monitoring method for tidal irrigation plant monitoring. By adopting the weighing monitoring method, it can bring convenience to tidal irrigation plant monitoring, without the need for frequent manual measurement operation records. Since the weighing perception device is a low-energy-consuming device and is in a dormant state most of the time, and at the same time has the characteristics of small volume and low power consumption, it greatly simplifies the on-site monitoring installation process. Through the weighing method, growth condition parameters such as the weight of plants can be accurately obtained, solving the problem of difficult online acquisition of crop information. At the same time, combined with parameters such as the real-time weight of the substrate, accurate irrigation can be carried out according to the growth situation of plants at different times.

[0048] In one embodiment, the obtaining of the real-time substrate water content includes: calculating the substrate water content according to the saturated weight of the substrate and the fresh weight of the plant obtained after each irrigation, in combination with the real-time weight of the substrate and the dry weight of the substrate.

[0049] In the tidal irrigation method, the substrate is the supplier of plant water and nutrients. The water content of the substrate directly affects the growth environment of plants and the quality and yield of crops. Most of the existing devices for measuring the water content of the substrate directly use soil moisture sensors. Since the substrate cultivation particles are loose compared with the soil, the detection porosity is larger, and the density and water content change greatly, which is very different from the soil, and there are large errors in actual measurement.

[0050] There are few existing devices dedicated to measuring the water content of the substrate. The sensor calibration process is complex, and the applicability of the device to different substrate types is poor. The detection stability and accuracy need to be improved. At the same time, during the cultivation process, the developed crop roots affect the water content measurement, resulting in the inapplicability of the traditional measurement method to the tidal irrigation method measurement.

[0051] In the embodiment of the present invention, the calculation of the substrate water content can be obtained by calculating the dry weight of the substrate, the saturated weight of the substrate, the real-time weight of the substrate, and the fresh weight. The calculation formula is as follows:

[0052]

[0053] In the formula, V represents the real-time water content of the substrate; W t represents the real-time weight of the substrate; W b represents the dry weight of the substrate; W f represents the fresh weight of the plant measured by the weighing mechanism each time; W w represents the weight when the substrate is saturated with water.

[0054] The tidal seedling cultivation monitoring and irrigation decision-making method according to the embodiments of the present invention does not require pre-calibration. It only obtains information through the weight of the weighing mechanism, has strong applicability to different substrate types, high detection stability and accuracy, and is not affected by the water content of crop roots during the cultivation process.

[0055] In one embodiment, the irrigation threshold is determined according to the saturated weight of the substrate obtained after each irrigation and the corresponding irrigation coefficient; wherein, the irrigation coefficient is determined according to the type of seedling tray, the type of seedlings and the seedling stage. The above embodiments are illustrated by examples and will not be elaborated here.

[0056] In one embodiment, after calculating the fresh weight of the plant after irrigation, it further includes: determining the fresh weight increment according to the fresh weight of the plant at adjacent irrigation times, and combining the duration between adjacent irrigation times to determine the growth rate of the plant; determining the evapotranspiration amount according to the change value of the real-time weight of the substrate obtained by the weighing mechanism per unit time, and combining the unit time to determine the evapotranspiration rate of the plant.

[0057] In the monitoring of the growth activities of plants, the water cycle, as an important physiological activity of plants, affects plants throughout the growth stage. Evapotranspiration, as an important part of the plant hydrological cycle, is closely related to various physiological activities of plants and the formation of biological yields. At present, the evapotranspiration amount of plants is mainly measured by a lysimeter, which is based on the principle of water balance and directly reflects the evapotranspiration of water through the change in the overall mass of the plant-soil per unit time.

[0058] For the research on the water consumption law of plants in the substrate cultivation mode, it is mainly achieved by monitoring the substrate environment through water content, conductivity and temperature sensors. At present, there is no evapotranspiration measurement device for the tidal irrigation cultivation mode, and it is difficult to study the water consumption law of plants in this cultivation method. During the cultivation process of the tidal irrigation method, due to the difficulty in obtaining crop information online, there are problems such as the inability to determine the reasonable irrigation points of water and nutrients and the uncertainty of the absorption amount of water and nutrients by crops, making it difficult to grasp the growth status of plants in real time.

[0059] In the embodiments of the present invention, the growth rate can be obtained by the increase in the fresh weight of the plant obtained within a unit time interval, and the calculation formula is as follows:

[0060]

[0061] In the formula, G R represents the growth rate of the plant; represents the fresh weight of the plant at time T1; represents the fresh weight of the plant at time T2.

[0062] The evapotranspiration rate is the instantaneous evapotranspiration rate and the daily evapotranspiration rate. The evapotranspiration amount of the system can be calculated by the change in weight per unit time. The specific calculation formula is as follows:

[0063]

[0064] In the formula, ET R represents the evapotranspiration rate of the plant; BW T1 represents the weight value of the substrate at time T1; BW T2 represents the weight value of the substrate at time T2.

[0065] In the tidal seedling-raising monitoring and irrigation decision-making method according to the embodiment of the present invention, the evapotranspiration amount is determined based on the change value of the real-time weight of the substrate by the weighing mechanism. Online acquisition is simple and efficient, which is beneficial to determining a reasonable water and nutrient irrigation point, determining the absorption amount of water and nutrients by the plant, and is beneficial to grasping the growth status of the plant in real time. For the research on the water consumption law of plants under the cultivation mode of the tidal irrigation method, it is beneficial to better regulate the water and fertilizer conditions during the growth process of plants and improve the yield and quality of protected crops.

[0066] In one embodiment, after determining the evapotranspiration amount, it further includes: determining the water use efficiency according to the fresh weight increment of the plant at adjacent irrigation times and the corresponding evapotranspiration amount.

[0067] Based on the growth rate of the plant and the evapotranspiration amount of the plant, the water use efficiency is calculated. The water use efficiency is the ratio of the plant growth amount to the evapotranspiration amount per unit time. The calculation formula is as follows:

[0068]

[0069] In the formula, WUE represents the water use efficiency; represents the plant growth amount; represents the evapotranspiration amount of the plant.

[0070] Next, the tidal seedling-raising monitoring and irrigation decision-making device provided by the present invention will be described. The tidal seedling-raising monitoring and irrigation decision-making device described below can be mutually corresponded and referred to with the tidal seedling-raising monitoring and irrigation decision-making method described above.

[0071] Figure 2 is a schematic structural diagram of the tidal seedling-raising monitoring and irrigation decision-making device provided by the present invention, as Figure 2As shown in the figure, the tidal seedling-raising monitoring and irrigation decision-making device includes: a fresh weight calculation module 201, a water volume calculation module 202, and an irrigation processing module 203. Among them, the fresh weight calculation module 201 is used to, after each irrigation ends, obtain the saturated weight of the substrate when the plants and the substrate in the cultivation tank reach a stable and saturated state through a weighing mechanism, and combine it with the initial saturated weight of the substrate when the substrate was saturated with water before planting the plants to calculate the fresh weight of the plants after irrigation; the water volume calculation module 202 is used to obtain the real-time weight of the substrate of the plants and the substrate as a whole through the weighing mechanism, and combine the fresh weight of the plants and the saturated weight of the substrate to calculate the real-time reference irrigation water volume; the irrigation processing module 203 is used to obtain the real-time water content of the substrate. If the real-time water content of the substrate is less than the irrigation threshold, the seedling tray is irrigated based on the real-time reference irrigation water volume.

[0072] In an apparatus embodiment, the irrigation processing module 202 is specifically configured to: calculate the water content of the substrate according to the saturated weight of the substrate and the fresh weight of the plants obtained after each irrigation ends, in combination with the real-time weight of the substrate and the dry weight of the substrate.

[0073] In an apparatus embodiment, the irrigation threshold is determined according to the saturated weight of the substrate obtained after each irrigation ends and the corresponding irrigation coefficient; wherein, the irrigation coefficient is determined according to the type of seedling tray, the type of seedlings, and the seedling stage.

[0074] In an apparatus embodiment, after calculating the fresh weight of the plants after irrigation, the irrigation processing module 203 is further configured to: determine the fresh weight increment according to the fresh weight of the plants at adjacent irrigation times, and combine the duration between adjacent irrigation times to determine the growth rate of the plants; determine the evapotranspiration amount according to the change value of the real-time weight of the substrate obtained by the weighing mechanism per unit time, and combine the unit time to determine the evapotranspiration rate of the plants.

[0075] In an apparatus embodiment, the irrigation processing module 203 is further configured to: determine the water use efficiency according to the fresh weight increment of the plants at adjacent irrigation times and the corresponding evapotranspiration amount.

[0076] The apparatus embodiments provided in the embodiments of the present invention are for implementing the above-mentioned method embodiments. For the specific process and detailed content, please refer to the above-mentioned method embodiments, and details will not be described herein again.

[0077] The tidal seedling-raising monitoring and irrigation decision-making device provided in the embodiments of the present invention has the same implementation principle and the same technical effects as those in the foregoing tidal seedling-raising monitoring and irrigation decision-making method embodiments. For a brief description, for the parts not mentioned in the embodiments of the tidal seedling-raising monitoring and irrigation decision-making device, reference may be made to the corresponding content in the foregoing tidal seedling-raising monitoring and irrigation decision-making method embodiments.

[0078] Figure 3It is a schematic structural diagram of the tidal seedling cultivation monitoring and irrigation decision-making system provided by the present invention. As Figure 3 shown, the tidal seedling cultivation monitoring and irrigation decision-making system includes: a weighing mechanism 1, a load-bearing mechanism 8, a cultivation tray 9, a gateway device 10, and the tidal seedling cultivation monitoring and irrigation decision-making device described in the above embodiment; the weighing mechanism 1 is connected to the load-bearing mechanism 8, the cultivation tray 9 is located above the bottom surface of the load-bearing mechanism, and plants 7 are planted in the cultivation tray 9; the weighing mechanism 1 is provided with an antenna module 51 for sending the weight data obtained by the weighing mechanism 1 to the tidal seedling cultivation monitoring and irrigation decision-making device via the gateway device 10.

[0079] In one embodiment, the top weighing mechanism 1 includes: an upper hook 2, a lower hook 4, and a tension sensor 3; the tension sensor 3 is connected to the bottom load-bearing mechanism 8 through the lower hook 4; the load-bearing mechanism 8 includes an adjustable crossbeam 13 for adjusting the distance between the crossbeams to adapt to cultivation trays of different sizes; the lower hook 4 is connected to the load-bearing mechanism 8 through a suspension rope 6, and the length of the suspension rope is adjusted to adapt to different growth heights of the plants. Figure 4 It is a front view of a load-bearing mechanism provided by the present invention. As Figure 4 shown, it includes an adjustable crossbeam 13.

[0080] This system can adopt an internal wireless networking method. The gateway device can obtain data of the monitoring device at a fixed position or while moving with the device. At the same time, a radio frequency communication network ensures that the network can cover the entire greenhouse environment of the planting area, bringing convenience to network layout.

[0081] The weighing perception device in the weighing mechanism can be conveniently installed in the tidal irrigation crop cultivation equipment, and the perception device can be arranged during the planting stage or the crop germination stage. Since the weighing perception device is a low-power consumption device and is in a dormant state most of the time, the device will construct a monitoring network through the networking process. Each weighing perception device starts to attempt to communicate with the gateway device using a Lora high-frequency signal. If a gateway handshake signal is obtained, the perception device can immediately join the network constructed by the relay device.

[0082] The weighing perception device collects the weight data in steps 101 to 103 at a set time interval and stores it in the device. The weighing perception device actively sends data to the gateway device at regular intervals. The gateway device preliminarily sorts, filters, and fuses the data and sends it to the tidal seedling cultivation monitoring and irrigation decision-making device (this device can be a kind of remote cloud server, such as Figure 3 the server 11 in). The mobile terminal can communicate with the remote cloud server to obtain data remotely.

[0083] The tidal seedling raising monitoring and irrigation decision-making system uses wireless transmission components and gateways to build an all-round monitoring network for multi-point plant growth. The system integrates low-power wide-area network technology, featuring low power consumption and long transmission distance. By connecting the parameters of the tension sensor to the platform through the Lora star network, real-time remote monitoring can be conveniently achieved. A high-throughput monitoring platform for low-power wide-area network greenhouse tidal irrigation cultivation has been built. Users can also directly and conveniently view the corresponding cloud data records on the mobile phone at the site.

[0084] Figure 5 It is a structural schematic diagram of a weighing mechanism provided by the present invention. The weighing mechanism includes an antenna 51 and a display screen 52. The display screen 52 can be used to display parameters such as the fresh weight of plants, the real-time weight of the substrate, the reference irrigation amount, the real-time water content of the substrate, the growth rate of plants, or the evapotranspiration rate of plants. The weighing mechanism has a relatively small volume, with a pointed upper end and a rectangular lower end. When in use, the entire device is suspended on the tidal irrigation cultivation bed to build a monitoring network.

[0085] Figure 6 It is an application scenario diagram of the tidal seedling raising monitoring and irrigation decision-making system provided by the present invention. Multiple sets of weighing mechanisms, load-bearing mechanisms, and cultivation trays are set up, combined with a gateway device and a server to form a network for the seedling raising monitoring and irrigation decision-making of multiple plants.

[0086] The tension sensor 3 can select an S-type tension sensor. For example, a four-wire S-type high-precision force transmission S-type tension sensor BAB-5MT-20kg can be selected.

[0087] The bottom weighing mechanism 8 can also adjust the weighing beam 13 to adjust the distance between the beams to adapt to different cultivation trays 9. The length of the suspension rope 6 can also be adjusted to adapt to the height of different plants 7, and the position of the load-bearing device 8 is adjusted to be horizontal.

[0088] The communication between the weight sensing device 1 and the gateway device 10 inside the equipment uses low-frequency Lora 433MHz radio frequency to transmit data, extending the communication distance with a lower transmission frequency to ensure the stability of the signal transmission of the weight sensing device in the greenhouse. The overall network structure is a mesh network, and the weight sensing device 1 and the gateway device 10 in the network form a self-organizing network. The gateway device 10 is connected to the remote server 11 through GPRS to provide data support for tidal irrigation cultivation monitoring. The remote server constructs a cloud service to provide data and decision support for tidal irrigation cultivation monitoring. The mobile device 12 can access the cloud server to meet the needs of data collection and on-site network diagnosis and maintenance.

[0089] Figure 7This is the circuit board chip connection diagram provided by the present invention. The data acquisition module of the weight sensing device 1 can use the HX712 electronic scale dedicated high-precision A / D conversion chip, which integrates a low-noise amplifier with a gain of 128 and a 24-bit A / D converter, and can power the tension sensor. Considering that the piezoresistive sensor used is affected by temperature and has a certain temperature drift, a temperature sensor DS18B20 can also be added for software compensation of the temperature drift of the tension / tension sensor to improve the measurement accuracy of the system. The core microcontroller of the weight sensing device 1 uses the low-power series L431CCT6 design of STM32, which is used to coordinate the normal operation of each device and complete the data collection, processing and transmission. The value of the tension sensor is converted into a numerical value through the AD chip. After the tension sensor is calibrated, the tension coefficient of the tension sensor is determined, and then the tension data is collected.

[0090] The weight sensing device 1 can realize electrical connection and signal transmission with each sensor through a data line. At the same time, a display screen is also provided on the weight sensing device, and an OLED display screen can be used to facilitate on-site operators to obtain measurement data in real time. The data acquisition mechanism in the hook 5 is also provided with a storage chip W25Q64 for saving system parameters and backing up collected sensor data. It should be noted that the various sensors in this embodiment and the chips, processors and other electronic components of the weight sensing device 1 can adopt other models, which is not limited here. The power supply part of the weight sensing device 1 can adopt an external power supply circuit designed with LM2576T-12 and AMS117-3.3 chips. The weight sensing device 1 mainly completes the periodic acquisition of the value of the tension sensor.

[0091] The wireless transmission component in the weight sensing device 1 is used to transmit the parameter signal collected by the weight sensing device 1 to a remote server. Specifically, the wireless transmission component of the weight sensing device 1 can use an APC340 module, through an antenna 51, using a Lora spread spectrum modulation method, and a transparent transmission method to achieve one-to-one and one-to-many networking communications; a BM71 Bluetooth module can also be set for on-site use, so that relevant data information can be easily viewed through an application on a mobile phone at the work site.

[0092] Considering the inconvenient wiring of the top weight sensing device 1, a data acquisition board can be set inside the top weight sensing device 1. A wireless communication module is integrated on the data acquisition board to send data to the data acquisition mechanism, server or mobile phone. This data acquisition board only collects the measurement values of the tensile sensor. The power supply part adopts a dry battery power supply circuit designed with the TPS61221 chip. There is no external connection for the entire top weight sensing device 1, so it can be used flexibly. The data acquisition board is powered by two alkaline batteries with a capacity of 2500 mAh, the sampling interval is 5 minutes, and the working time can reach more than 120 days, enabling the monitoring of the entire growth cycle of plants.

[0093] A display screen 52 is also provided on the weight sensing device 1. An OLED display screen can be used, which is convenient for on-site operators to obtain measurement data in real time. The weight sensing device 1 also has a storage chip W25Q64 inside, which is used to save system parameters and back up the sensor data collected.

[0094] The gateway 10 can adopt a GPRS gateway module. The acquisition node communicates with the GPRS gateway through the wireless transmission component, and transmits the data to the server 7 for storage. Therefore, the terminal computer or mobile phone 12 can also view the relevant data information in real time with the corresponding software.

[0095] This system uses the wireless transmission component and the gateway to construct a tidal irrigation plant growth monitoring system. The system integrates low-power wide-area network technology and has the characteristics of low power consumption and long transmission distance. The weighing device 1 can be connected to the platform through the Lora star network, which is convenient for remote real-time monitoring. A high-throughput monitoring platform for tidal irrigation substrate cultivation with low-power wide-area network is built.

[0096] The system provided by the present invention meets the needs of plant growth and online monitoring in tidal irrigation seedling raising. It can realize wireless networking, multi-parameter online acquisition, reliable positioning, and collection of crop evapotranspiration, effectively changing the plant monitoring method. It can obtain the water consumption of plants according to the weight change of the substrate in the tidal irrigation cultivation tank, and establish a water migration law model of plants cultivated by tidal irrigation according to the water evaporation amount and crop water consumption in the cultivation tank during the irrigation cycle. Precise irrigation of plants can be carried out according to the water consumption of plants. It promotes the effective management of plant cultivation, promotes a major breakthrough in the on-demand management of crop production, improves agricultural production efficiency, and promotes the rapid development of facility agriculture and urban modern agriculture.

[0097] Figure 8 It is a schematic structural diagram of the electronic device provided by the present invention, as Figure 8As shown in the figure, the electronic device may include: a processor 801, a communications interface 802, a memory 803, and a communication bus 804. Among them, the processor 801, the communications interface 802, and the memory 803 communicate with each other through the communication bus 804. The processor 801 can call the logical instructions in the memory 803 to execute the tidal seedling cultivation monitoring and irrigation decision-making method, which includes: after each irrigation ends, through a weighing mechanism, obtaining the saturated weight of the substrate when the plants and the substrate in the cultivation tank reach a stable saturated state, and combining the initial saturated weight of the substrate when the substrate was saturated with water before planting the plants, calculating the fresh weight of the plants after irrigation; obtaining the real-time weight of the substrate of the plants and the substrate as a whole through the weighing mechanism, and combining the fresh weight of the plants and the saturated weight of the substrate, calculating the real-time reference irrigation amount; obtaining the real-time water content of the substrate, and if the real-time water content of the substrate is less than the irrigation threshold, irrigating the seedling tray based on the real-time reference irrigation amount.

[0098] In addition, when the logical instructions in the above-mentioned memory 803 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 for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

[0099] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the tidal seedling cultivation monitoring and irrigation decision-making method provided by each of the above methods. The method includes: after each irrigation ends, through a weighing mechanism, obtaining the saturated weight of the substrate when the plants and the substrate in the cultivation tank reach a stable saturated state, and combining the initial saturated weight of the substrate when the substrate was saturated with water before planting the plants, calculating the fresh weight of the plants after irrigation; obtaining the real-time weight of the substrate of the plants and the substrate as a whole through the weighing mechanism, and combining the fresh weight of the plants and the saturated weight of the substrate, calculating the real-time reference irrigation amount; obtaining the real-time water content of the substrate. If the real-time water content of the substrate is less than the irrigation threshold, then irrigating the seedling tray based on the real-time reference irrigation amount.

[0100] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is configured to execute the tidal seedling cultivation monitoring and irrigation decision-making method provided by each of the above embodiments. The method includes: after each irrigation ends, through a weighing mechanism, obtaining the saturated weight of the substrate when the plants and the substrate in the cultivation tank reach a stable saturated state, and combining the initial saturated weight of the substrate when the substrate was saturated with water before planting the plants, calculating the fresh weight of the plants after irrigation; obtaining the real-time weight of the substrate of the plants and the substrate as a whole through the weighing mechanism, and combining the fresh weight of the plants and the saturated weight of the substrate, calculating the real-time reference irrigation amount; obtaining the real-time water content of the substrate. If the real-time water content of the substrate is less than the irrigation threshold, then irrigating the seedling tray based on the real-time reference irrigation amount.

[0101] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative labor.

[0102] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than 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 recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tidal seedling raising monitoring and irrigation decision-making method, characterized in that, including: After each irrigation ends, through a weighing mechanism, obtain the saturated weight of the substrate when the plants and the substrate in the cultivation tank reach a stable saturated state, and combine it with the initial saturated weight of the substrate when the substrate was saturated with water before planting the plants to calculate the fresh weight of the plants after irrigation; Obtain the real-time weight of the substrate of the plants and the substrate as a whole through the weighing mechanism, and combine the fresh weight of the plants and the saturated weight of the substrate to calculate the real-time reference irrigation amount; Obtain the real-time water content of the substrate. If the real-time water content of the substrate is less than the irrigation threshold, perform seedling tray irrigation based on the real-time reference irrigation amount; After calculating the fresh weight of the plants after irrigation, it further includes: Determine the fresh weight increment according to the fresh weight of the plants at adjacent irrigation times, and combine the duration between adjacent irrigation times to determine the growth rate of the plants; Determine the evapotranspiration amount according to the change value of the real-time weight of the substrate obtained by the weighing mechanism per unit time, and combine the unit time to determine the evapotranspiration rate of the plants; After determining the evapotranspiration amount, it further includes: Determine the water use efficiency according to the fresh weight increment of the plants at adjacent irrigation times and the corresponding evapotranspiration amount; The irrigation threshold is determined according to the saturated weight of the substrate obtained after each irrigation ends and the corresponding irrigation coefficient; wherein, the irrigation coefficient is determined according to the type of seedling tray, the type of seedlings and the seedling stage; Obtaining the real-time water content of the substrate includes: According to the saturated weight of the substrate obtained after each irrigation ends and the fresh weight of the plants, combine the real-time weight of the substrate and the dry weight of the substrate to calculate the water content of the substrate.

2. A tidal seedling raising monitoring and irrigation decision-making device, characterized in that, including: A fresh weight calculation module, which is used to, after each irrigation ends, through a weighing mechanism, obtain the saturated weight of the substrate when the plants and the substrate in the cultivation tank reach a stable saturated state, and combine it with the initial saturated weight of the substrate when the substrate was saturated with water before planting the plants to calculate the fresh weight of the plants after irrigation; A water volume calculation module, which is used to obtain the real-time weight of the substrate of the plants and the substrate as a whole through the weighing mechanism, and combine the fresh weight of the plants and the saturated weight of the substrate to calculate the real-time reference irrigation amount; An irrigation processing module, which is used to obtain the real-time water content of the substrate. If the real-time water content of the substrate is less than the irrigation threshold, perform seedling tray irrigation based on the real-time reference irrigation amount; Specifically, the fresh weight calculation module is used for: Determine the fresh weight increment according to the fresh weight of the plants at adjacent irrigation times, and combine the duration between adjacent irrigation times to determine the growth rate of the plants; Determine the evapotranspiration amount according to the change value of the real-time weight of the substrate obtained by the weighing mechanism per unit time, and combine the unit time to determine the evapotranspiration rate of the plants; Specifically, the fresh weight calculation module is further used for: Determine the water use efficiency according to the fresh weight increment of the plants at adjacent irrigation times and the corresponding evapotranspiration amount; Specifically, the irrigation processing module is used for: The irrigation threshold is determined according to the saturated weight of the substrate obtained after each irrigation ends and the corresponding irrigation coefficient; wherein, the irrigation coefficient is determined according to the type of seedling tray, the type of seedlings and the seedling stage; Specifically, the irrigation processing module is used for: According to the saturated weight of the substrate obtained after each irrigation ends and the fresh weight of the plants, combine the real-time weight of the substrate and the dry weight of the substrate to calculate the water content of the substrate.

3. A tidal seedling raising monitoring and irrigation decision-making system, characterized in that, including: A weighing mechanism, a load-bearing mechanism, a cultivation tray, a gateway device, and the tidal seedling raising monitoring and irrigation decision-making device according to claim 2; The weighing mechanism is connected to the load-bearing mechanism, and the cultivation tray is located above the bottom surface of the load-bearing mechanism, and plants are planted in the cultivation tray; The weighing mechanism is provided with an antenna module for sending the weight data obtained by the weighing mechanism to the tidal seedling raising monitoring and irrigation decision-making device via the gateway device.

4. The tidal seedling cultivation monitoring and irrigation decision-making system according to claim 3, characterized in that, The weighing mechanism includes: an upper hook, a lower hook, and a tension sensor; the tension sensor is connected to the bottom load-bearing mechanism through the lower hook; The load-bearing mechanism includes an adjustable cross beam for adjusting the distance between the cross beams to adapt to cultivation trays of different sizes; The lower hook is connected to the load-bearing mechanism through a suspension rope, and the length of the suspension rope is adjusted to adapt to different growth heights of plants.

5. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, the steps of the tidal seedling raising monitoring and irrigation decision-making method according to claim 1 are implemented.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the tidal seedling raising monitoring and irrigation decision-making method according to claim 1 are implemented.

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