CN114594012A - Tidal seedling monitoring and irrigation decision-making method, device and system - Google Patents

Abstract

The invention provides a tidal seedling raising monitoring and irrigation decision method, a device and a system, wherein the method comprises the following steps: after each irrigation is finished, acquiring the saturated weight of the matrix when the plant and the matrix in the cultivation tank integrally reach a stable saturated state through a weighing mechanism, and calculating the fresh weight of the irrigated plant by combining the initial saturated weight of the matrix when the matrix is saturated by water before the plant is planted; acquiring the real-time weight of the plant and the whole matrix through a weighing mechanism, and calculating the real-time reference irrigation quantity by combining the fresh weight of the plant and the saturated weight of the matrix; and acquiring the real-time water content of the matrix, and if the real-time water content of the matrix is smaller than an irrigation threshold, performing seedling tray irrigation based on the real-time reference irrigation amount. The method does not need manual frequent measurement operation records, and greatly simplifies the field monitoring and installation process. The method has the advantages that the growth condition parameters such as the weight of the plant and the like can be accurately obtained through a weighing mode, the problem that the crop information is difficult to obtain on line is solved, and the plant can be accurately irrigated according to the growth condition of the plant in different periods.

Description

Tidal seedling monitoring and irrigation decision-making method, device and system

technical field

The invention relates to the field of crop irrigation, in particular to a tidal seedling monitoring and irrigation decision-making method, device and system.

Background technique

The tidal irrigation system is a high-efficiency water-saving irrigation system designed based on the principle of tidal fluctuation. It is suitable for the planting and management of various potted plants, and can effectively improve the utilization efficiency of water resources and nutrient solution.

At present, in the process of cultivation, due to the difficulty of online acquisition of crop information, there are problems such as the inability to determine a reasonable water and nutrient irrigation point, and the uncertainty of the crop's absorption of water and nutrients. It is difficult to grasp the growth status of the plant in real time. Mainly, different liquid levels are used in different periods, and the specific duration is basically judged by experience, and the accuracy is not high.

SUMMARY OF THE INVENTION

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

The invention provides a tidal seedling monitoring and irrigation decision-making method. The initial saturated weight of the substrate when the irrigation is saturated, and the fresh weight of the plant after irrigation is calculated; the real-time weight of the overall substrate of the plant and the substrate is obtained by the weighing mechanism, and the real-time reference irrigation water is calculated in combination with the fresh weight of the plant and the saturated weight of the substrate The real-time water content of the substrate is obtained, and if the real-time water content of the substrate is less than the irrigation threshold, the seedling tray irrigation is performed based on the real-time reference irrigation amount.

According to the tidal seedling monitoring and irrigation decision-making method according to an embodiment of the present invention, the acquiring real-time substrate water content includes: combining the substrate saturated weight and the plant fresh weight obtained after each irrigation Real-time weight and substrate dry weight to calculate substrate moisture content.

According to the tidal seedling monitoring and irrigation decision-making method according to an embodiment of the present invention, 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 the seedling tray , The seedling species and seedling period are determined.

According to the tidal seedling monitoring and irrigation decision-making method according to an embodiment of the present invention, after calculating the fresh weight of plants after irrigation, the method further includes: determining the fresh weight increment according to the fresh weight of plants at adjacent irrigation moments, and combining the adjacent irrigation moments determine the growth rate of the plant; 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 determine the evapotranspiration rate of the plant in combination with the unit duration.

According to the tidal seedling monitoring and irrigation decision method according to an embodiment of the present invention, after determining the evapotranspiration, the method further includes: determining the water use efficiency according to the increment of plant fresh weight at adjacent irrigation moments and the corresponding evapotranspiration.

The invention also provides a tidal seedling monitoring and irrigation decision-making device, comprising: a fresh weight calculation module, which is used to obtain the substrate when the plants in the cultivation tank and the substrate as a whole reach a stable saturated state through a weighing mechanism after each irrigation is completed. Saturated weight, combined with the initial saturated weight of the substrate when the substrate is saturated with water before planting the plant, to calculate the fresh weight of the plant after irrigation; the water amount calculation module is used to obtain the real-time weight of the entire substrate of the plant and the substrate through the weighing mechanism. The fresh weight of the plant and the saturated weight of the substrate are used to calculate the real-time reference irrigation amount; the irrigation processing module is the same as obtaining 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 irrigation is performed based on the real-time reference irrigation amount.

The invention also provides a tidal seedling monitoring and irrigation decision-making system, comprising: a weighing mechanism, a load-bearing mechanism, a cultivation plug, a gateway device, and the above-mentioned tidal seedling 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 the 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 nursery monitoring and irrigation decision-making device.

According to a tidal seedling monitoring and irrigation decision-making system according to 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 The load-bearing mechanism includes adjustable beams, and the adjustable beams are used to adjust the spacing between the beams to adapt to cultivation trays of different sizes; the lower hook is connected with the load-bearing mechanism through a hanging rope, and by adjusting the length of the hanging rope, the Adapt to different growth heights of plants.

The tidal seedling monitoring and irrigation decision-making method and device provided by the present invention adopts the weighing monitoring method, which can bring convenience to the monitoring of tidal irrigated plants, and does not require frequent manual measurement and operation records. Part of the time is in a dormant state, and at the same time, it has the characteristics of small size and low power consumption, which greatly simplifies the on-site monitoring and installation process. The plant weight and other growth parameters can be accurately obtained by weighing, which solves the problem of difficulty in obtaining crop information online. At the same time, combined with the real-time weight of the substrate and other parameters, accurate irrigation can be carried out according to the plant growth in different periods.

Description of drawings

In order to explain the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are the For some embodiments of the invention, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the schematic flow sheet of tidal seedling monitoring and irrigation decision-making method provided by the present invention;

Fig. 2 is the structural representation of the tidal type seedling monitoring and irrigation decision-making device provided by the present invention;

Fig. 3 is the structural representation of the tidal seedling monitoring and irrigation decision-making system provided by the present invention;

4 is a front view of a load-bearing mechanism provided by the present invention;

5 is a schematic structural diagram of a weighing mechanism provided by the present invention;

6 is an application scenario diagram of the tidal seedling monitoring and irrigation decision-making system provided by the present invention;

7 is a circuit board chip connection diagram provided by the present invention;

8 is a schematic structural diagram of an electronic device provided by the present invention;

Description of reference numbers:

1: Weighing mechanism; 2: Upper hook; 3: Tension sensor;

4: lower hook; 5: hook; 6: hanging rope;

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

10: gateway; 11: server; 12: mobile phone;

13: Adjustable load-bearing beam 51: Antenna 52: Display screen.

Detailed ways

In order 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. Obviously, the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The tidal seedling monitoring and irrigation decision-making method and device of the present invention will be described below with reference to FIGS. 1 to 8 . Fig. 1 is the schematic flow chart of tidal seedling monitoring and irrigation decision-making method provided by the present invention, as shown in Fig. 1, the present invention provides tidal seedling monitoring and irrigation decision-making method, including:

101. After each irrigation, through the weighing mechanism, obtain the saturated weight of the matrix when the plants and the matrix in the cultivation tank as a whole reach a stable saturation state, and calculate the irrigated plants in combination with the initial saturated weight of the matrix when the matrix is saturated with water before planting plants. Fresh weight.

First, based on the weight of the tidal irrigation substrate cultivation tank when the initial irrigation is saturated and the weight when the substrate in the cultivation tank reaches a stable saturated state after each irrigation, the fresh weight of the plant is calculated, which is also the growth of the plant:

W _f =W _w -W _d ;

In the formula, W _f represents the fresh weight of the plant, and W _w represents the weight of the substrate when the substrate reaches a stable saturation state after irrigation, that is, the weight collected by the weighing mechanism after all the nutrient solution in the seedbed is discharged 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 plants are planted. That is to say, before the plants are planted, the water can be saturated first, and W _d can be collected by the weighing mechanism.

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

102. Obtain the real-time weight of the plant and the substrate as a whole through the weighing mechanism, and calculate the real-time reference irrigation amount in combination with the fresh weight of the plant and the saturated weight of the substrate.

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

I _REF =W _w -W _t +W _f

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.

Specifically, the server also performs the corresponding calculation.

103. 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 content.

In one embodiment, the irrigation coefficient N can be determined according to the type of the seedling tray, the type of the seedlings and the different periods of the seedlings, and then combined with W _w *N as the corresponding irrigation threshold, when V≤W _w *N, the seedling tray irrigation is performed, and V is the real-time moisture content of the substrate.

Correspondingly, the server also performs 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 a corresponding reference irrigation amount to the irrigation equipment to implement seedling tray irrigation based on the real-time reference irrigation amount.

During tidal irrigation, the seedbed is swelled to irrigate the seedlings, and the substrate absorbs water and the weight increases until the weight of the seedling cultivation unit increases I _REF , and the irrigation to the seedlings is stopped. The seedbed is receded, the backflow nutrient solution takes away the salt accumulated in the seedling tray, and the substrate is rinsed at the same time with each irrigation. The formula for calculating when irrigation is stopped is as follows:

W _t =W _n +I _REF

In the formula, W _n represents the weight collected by the weighing mechanism when the irrigation water is started.

The tidal seedling monitoring and irrigation decision-making method provided by the present invention provides a new monitoring method for tidal irrigated plant monitoring. The weighing monitoring method can bring convenience to tidal irrigated plant monitoring, and does not require frequent manual measurement and operation records. The weighing sensing device is a low energy consumption device, which is in a dormant state most of the time, and has the characteristics of small size and low power consumption, which greatly simplifies the on-site monitoring and installation process. The plant weight and other growth parameters can be accurately obtained by weighing, which solves the problem of difficulty in obtaining crop information online. At the same time, combined with the real-time weight of the substrate and other parameters, accurate irrigation can be carried out according to the plant growth in different periods.

In one embodiment, the obtaining the real-time substrate water content includes: 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, calculating the substrate content water volume.

In tidal irrigation, the substrate acts as a supplier of water and nutrients for plants, and the water content of the substrate directly affects the environment for plant growth and the quality and yield of crops. Most of the existing devices for measuring the moisture content of substrates directly use soil moisture sensors. Compared with soil, the substrate cultivation particles are loose, the detection porosity is large, and the density and water content change greatly, which is very different from soil. There is a large error in the actual measurement.

There are few existing equipment dedicated to the determination of the water content of the matrix, the sensor calibration process is complicated, and the equipment has poor applicability to the detection of different matrix types, and the detection stability and accuracy need to be improved. At the same time, the development of crop root system during the cultivation process affects the measurement of water content, which makes the traditional measurement method unsuitable for the measurement of tidal irrigation.

In the embodiment of the present invention, the calculation of the moisture content of the substrate 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. Calculated as follows:

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; weight.

The tidal seedling monitoring and irrigation decision-making method according to the embodiment of the present invention does not require pre-calibration, and only obtains the weight information of the weighing mechanism. The process is not affected by the water content of crop roots.

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 period of seedlings. The foregoing embodiments are described by way of example, and are not repeated here.

In one embodiment, 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 the adjacent irrigation time, and determining the growth rate of the plant in combination with the duration of the adjacent irrigation time; The evapotranspiration amount is determined by the change value of the real-time weight of the substrate obtained by the weighing mechanism per unit time, and the evapotranspiration rate of the plant is determined in combination with the unit time.

In the monitoring of plant growth activities, water cycle is an important physiological activity of plants, and its impact on plants runs through the entire growth stage. As an important part of plant hydrological cycle, evapotranspiration is closely related to the formation of various physiological activities and biological yields of plants. At present, the evapotranspiration of plants is mainly measured by lysimeter, which directly reflects the evapotranspiration of water through the change of the overall quality of plant-soil in unit time according to the principle of water balance.

The research on the water consumption law of plants in the substrate cultivation mode is mainly realized by monitoring the substrate environment through water content, electrical conductivity and temperature sensors. At present, there is no evapotranspiration measurement device for tidal irrigation cultivation mode, and it is difficult to study the water consumption law of plants in this cultivation mode. In the process of tidal irrigation cultivation, due to the difficulty of online acquisition of crop information, there are problems such as inability to determine reasonable water and nutrient irrigation points, and uncertainty about the absorption of water and nutrients by crops. It is difficult to grasp the growth status of plants in real time.

In the embodiment of the present invention, the growth rate can be obtained by the increase of the fresh weight of the plant obtained in the unit time interval, and the calculation formula is as follows:

表示T₁时刻植物的鲜重；

表示T₂时刻植物的鲜重。In the formula, G _R represents the growth rate of the plant;

represents the fresh weight _of the plant at time T1;

Indicates the fresh weight of the plant at _T2 .

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

In the formula, ETR _represents the evapotranspiration rate of plants; BW _T1 represents the weight value _of the substrate at the time of T1 _; BW _T2 represents the weight value of the substrate at the time of T2.

In the tidal seedling monitoring and irrigation decision-making method of the embodiment of the present invention, the evapotranspiration amount is determined based on the change value of the real-time weight of the substrate through the weighing mechanism, and the online acquisition is simple and efficient, which is conducive to determining a reasonable water and nutrient irrigation point, and determining the plant's effect on water and nutrients. The absorption of nutrients is beneficial to grasp the growth status of plants in real time. The research on the law of plant water consumption under the cultivation mode of tidal irrigation is beneficial to better control the water and fertilizer conditions in the process of plant growth and improve the yield and quality of facility crops.

In one embodiment, after the determining of the evapotranspiration, the method further includes: determining the water use efficiency according to the increment of the fresh weight of the plant at adjacent irrigation moments and the corresponding evapotranspiration.

The water use efficiency is calculated based on the growth rate of the plant and the evapotranspiration of the plant. Water use efficiency is the ratio of plant growth to evapotranspiration per unit time, and the calculation formula is as follows:

表示植物的生长量；

表示植物的蒸散量。In the formula, WUE represents the water utilization rate;

Indicates the growth of the plant;

Indicates the evapotranspiration of plants.

The tidal seedling monitoring and irrigation decision-making device provided by the present invention is described below. The tidal seedling monitoring and irrigation decision-making device described below and the tidal seedling monitoring and irrigation decision-making method described above can be referred to each other correspondingly.

Fig. 2 is the structural schematic diagram of the tidal seedling monitoring and irrigation decision-making device provided by the present invention. As shown in Fig. 2, the tidal seedling monitoring and irrigation decision-making device comprises: a fresh weight calculation module 201, a water volume calculation module 202 and an irrigation processing module 203. Wherein, the fresh weight calculation module 201 is used to obtain the saturated weight of the substrate when the plants and the substrate in the cultivation tank as a whole reach a stable saturated state through the weighing mechanism after each irrigation is completed, combined with the initial saturation of the substrate when the substrate is saturated with water before planting plants Weight, calculates the fresh weight of the plant after irrigation; the water calculation module 202 is used to obtain the real-time weight of the plant and the substrate as a whole through the weighing mechanism, and calculate the real-time reference irrigation amount in combination with the fresh weight of the plant and the saturated weight of the substrate ; Irrigation processing module 203 is the same as acquiring 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 irrigation is performed based on the real-time reference irrigation amount.

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 plant obtained after each irrigation, and in combination with the real-time weight of the substrate and the dry weight of the substrate .

In an apparatus 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 period of seedlings.

In an embodiment of the device, the irrigation processing module 203 is further configured to: after calculating the fresh weight of the plants after irrigation: determine the fresh weight increment according to the fresh weight of the plants at the adjacent irrigation moments, and combine the duration of the adjacent irrigation moments to determine the fresh weight increment. The growth rate of the plant; the evapotranspiration amount is determined according to the change value of the real-time weight of the substrate obtained by the weighing mechanism per unit time, and the evapotranspiration rate of the plant is determined in combination with the unit time.

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

The apparatus embodiments provided in the embodiments of the present invention are for implementing the foregoing method embodiments. For specific processes and details, please refer to the foregoing method embodiments, which will not be repeated here.

The tidal seedling monitoring and irrigation decision-making device provided by the embodiment of the present invention has the same realization principle and technical effect as the aforementioned embodiments of the tidal seedling monitoring and irrigation decision-making method. For a brief description, the tidal seedling monitoring and irrigation decision-making device For the parts not mentioned in the embodiment part, reference may be made to the corresponding content in the foregoing embodiment of the tidal seedling monitoring and irrigation decision-making method.

Fig. 3 is the structural schematic diagram of the tidal seedling monitoring and irrigation decision-making system provided by the present invention, as shown in Fig. 3, the tidal seedling monitoring and irrigation decision-making system comprises: weighing mechanism 1, load-bearing mechanism 8, cultivation plug tray 9, Gateway device 10 and the tidal seedling monitoring and irrigation decision-making device described in the above-mentioned embodiment; the weighing mechanism 1 is connected to the load-bearing mechanism 8, the cultivation plug tray 9 is located above the bottom surface of the load-bearing mechanism, and the plant 7 is planted on the cultivation plug 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 monitoring and irrigation decision-making device via the gateway device 10 .

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 The mechanism 8 includes an adjustable beam 13, and the adjustable beam 13 is used to adjust the spacing between the beams to adapt to cultivation trays of different sizes; the lower hook 4 is connected to the load-bearing mechanism 8 through a hanging rope 6, and is adjusted by adjusting Suspension rope lengths to accommodate different growth heights of plants. FIG. 4 is a front view of a load-bearing mechanism provided by the present invention. As shown in FIG. 4 , it includes an adjustable beam 13 .

The system can adopt the internal wireless networking mode. The gateway device can obtain the data of the monitoring device in a fixed position or move with the device. At the same time, the radio frequency communication network ensures that the network can cover the greenhouse environment of the entire planting area, which brings convenience to the network layout.

The weighing sensing device in the weighing mechanism can be conveniently installed in the tidal irrigated crop cultivation equipment, and the sensing device can be arranged in the planting stage or the crop germination stage. Since the weighing sensing device is a low-energy device, it is in a dormant state most of the time. The device will build a monitoring network through the networking process. Each weighing sensing device starts to use Lora high-frequency signals to try to communicate with the gateway device. If the gateway handshake signal is obtained , the sensing device may join the network constructed by the relay device for the first time.

The weighing sensing device collects the weight data in steps 101 to 103 at a set time interval and stores it in the device, and the weighing sensing device actively sends data to the gateway device regularly. The gateway device preliminarily organizes, filters and fuses the data and sends it to the tidal seedling monitoring and irrigation decision-making device (the device can be a remote cloud server, such as server 11 in FIG. 3 ). The mobile terminal can communicate with the remote cloud server to realize mobile acquisition of data.

The tidal seedling monitoring and irrigation decision-making system uses wireless transmission components and gateways to build a multi-point plant growth all-round monitoring network. The system integrates low-power wide area network technology, which has the characteristics of low power consumption and long transmission distance. The parameters of the tension sensor are connected to the platform through the Lora star network, which can be easily monitored in real time remotely. The construction of a high-throughput monitoring platform for tidal irrigation plants in a low-power wide-area network greenhouse is realized. Users can also directly and conveniently view the corresponding cloud data records on the mobile phone on the spot.

FIG. 5 is a schematic structural 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 acquired parameters such as plant fresh weight, real-time substrate weight, reference irrigation amount, real-time substrate water content, plant growth rate or plant evapotranspiration rate. The weighing mechanism package has a small volume, the upper end is a pointed end, and the lower end is a rectangle. During application, the whole device is suspended on a tidal irrigation cultivation bed to construct a monitoring network.

Fig. 6 is the application scene diagram of the tidal seedling monitoring and irrigation decision-making system provided by the present invention, the weighing mechanism, the load-bearing mechanism and the cultivation plug tray are arranged in multiple sets, combined with a gateway device and a server to realize networking, and carry out multiple plants. Seedling monitoring and irrigation decisions.

Tensile sensor 3 can choose S-type tension sensor, for example, the high-precision four-wire S-type S-type tension sensor BAB-5MT-20kg can be selected.

The bottom weighing mechanism 8 can also adjust the weighing beams 13 for adjusting the spacing between the beams to adapt to different cultivation trays 9 . The length of the hanging rope 6 can also be adjusted to adapt to the height of different plants 7, and the position of the load-bearing device 8 can be adjusted to be level.

The communication between the weight sensing device 1 and the gateway device 10 in the equipment adopts the low frequency Lora 433MHz radio frequency to transmit data, and the communication distance is extended with a lower transmission frequency to ensure the stability of the signal transmission of the weight sensing equipment 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 an ad hoc network. The gateway device 10 is connected to the remote server 11 through GPRS to provide data support for the monitoring of tidal irrigation cultivation. The remote server builds 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 diagnosis and maintenance of the network.

Figure 7 is a circuit board chip connection diagram provided by the present invention. The data acquisition module of the weight sensing device 1 can be selected as a high-precision A/D conversion chip dedicated to the HX712 electronic scale, and a low-noise amplifier with a gain of 128 and a 24-bit A/D chip are integrated on the chip. Converter to power the tension sensor. Considering that the piezoresistive sensor used is affected by temperature, the sensor has a certain temperature drift, and a temperature sensor DS18B20 can also be added for software compensation of the temperature drift of the tensile force/tensile force sensor to improve the measurement accuracy of the system. The core microcontroller of the weight sensing device 1 is designed by the low-power series L431CCT6 of STM32, which is used to coordinate the normal operation of each device and complete the collection, processing and transmission of data. 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 collection of the tension data is completed.

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

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

Considering the inconvenient wiring of the top weight sensing device 1, a data acquisition board can be set in the top weight sensing device 1, and a wireless communication module is integrated on the data acquisition board to send data to a data acquisition agency or a server or a mobile phone. The data acquisition board only collects the measurement values of the tension sensor. The power supply part adopts the dry battery power supply circuit designed by the TPS61221 chip. The whole top weight sensing device 1 has no external connection and can be used flexibly. The data acquisition board is powered by two alkaline batteries with a capacity of 2500mAh, the sampling interval is 5 minutes, and the working time can reach more than 120 days, which can monitor the entire growth cycle of plants.

The weight sensing device 1 is also provided with a display screen 52, and an OLED display screen can be used to facilitate the field operator to obtain the measurement data in real time. The weight sensing device 1 is also provided with a storage chip W25Q64 for saving system parameters and backing up the collected sensor data.

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

The system uses wireless transmission components and gateways to construct a tidal irrigation plant growth monitoring system. The system integrates low-power wide-area network technology, which has the characteristics of low power consumption and long transmission distance. The weighing device 1 is connected to the platform through the Lora star network, which can be easily monitored in real time remotely. The establishment of a high-throughput monitoring platform for low-power wide-area network tidal irrigation substrate cultivation is realized.

The system provided by the invention can realize wireless networking, multi-parameter online acquisition, reliable positioning, and crop evapotranspiration collection, and can effectively change the plant monitoring mode for the needs of plant growth and online monitoring in tidal irrigation and seedling raising. The water consumption of plants can be obtained according to the weight change of the substrate in the tidal irrigation cultivation tank. According to the water evaporation of the cultivation tank and the water consumption of crops in the irrigation cycle, the water migration law model of the tidal irrigation cultivation plants can be established. Plants are irrigated precisely based on their water consumption. Improve the effective management of plant cultivation, promote major breakthroughs in on-demand management of crop production, improve agricultural production efficiency, and promote the rapid development of facility agriculture and urban modern agriculture.

FIG. 8 is a schematic structural diagram of an electronic device provided by the present invention. As shown in FIG. 8 , the electronic device may include: a processor (processor) 801, a communication interface (Communications Interface) 802, a memory (memory) 803 and a communication bus 804, The processor 801 , the communication interface 802 , and the memory 803 communicate with each other through the communication bus 804 . The processor 801 can call the logic instructions in the memory 803 to execute the tidal seedling monitoring and irrigation decision-making method. The method includes: after each irrigation is completed, through the weighing mechanism, obtain the plants in the cultivation tank and the substrate as a whole to reach a stable saturation state. The saturated weight of the substrate at the time of planting is combined with the initial saturated weight of the substrate when the substrate is saturated with water before planting the plant, and the fresh weight of the plant after irrigation is calculated; the real-time weight of the overall substrate of the plant and the substrate is obtained by the weighing mechanism, combined with the fresh weight of the plant and the saturated weight of the substrate, 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, then perform seedling tray irrigation based on the real-time reference irrigation amount.

In addition, the above-mentioned logic instructions in the memory 803 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause 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 the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

In another aspect, the present invention also provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer When executing, the computer can execute the tidal seedling monitoring and irrigation decision-making methods provided by the above-mentioned methods, and the method includes: after each irrigation is completed, through the weighing mechanism, obtain the plant and the substrate in the cultivation tank when the whole reaches a stable saturation state. The saturated weight of the substrate is combined with the initial saturated weight of the substrate when the substrate is saturated with water before planting the plant, and the fresh weight of the plant after irrigation is calculated; the real-time weight of the entire substrate of the plant and the substrate is obtained through the weighing mechanism, combined with the fresh weight of the plant and the total weight of the substrate. The saturated weight of the substrate is calculated, and the real-time reference irrigation amount is calculated; the real-time water content of the substrate is obtained, and if the real-time water content of the substrate is less than the irrigation threshold, the seedling tray irrigation is performed based on the real-time reference irrigation amount.

In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, it is implemented to perform the tidal seedling monitoring and irrigation decision-making provided by the above embodiments The method includes: after each irrigation is completed, through a weighing mechanism, obtain the saturated weight of the substrate when the plants and the substrate in the cultivation tank as a whole reach a stable saturation state, and calculate the initial saturated weight of the substrate when the substrate is saturated with water before planting the plant. The fresh weight of the plant after irrigation; obtain the real-time weight of the overall substrate of the plant and the substrate through the weighing mechanism, calculate the real-time reference irrigation amount in combination with the fresh weight of the plant and the saturated weight of the substrate; obtain the real-time water content of the substrate, if the substrate is If the real-time water content is less than the irrigation threshold, the seedling tray irrigation is performed based on the real-time reference irrigation amount.

The device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

From 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 certainly can also be implemented by hardware. Based on this understanding, the above-mentioned technical solutions can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic A disc, an optical disc, etc., includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments or some parts of the embodiments.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not 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: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A tide type seedling raising monitoring and irrigation decision-making method is characterized by comprising the following steps:

after each irrigation is finished, acquiring the saturated weight of the matrix when the plant and the matrix in the cultivation tank integrally reach a stable saturated state through a weighing mechanism, and calculating the fresh weight of the irrigated plant by combining the initial saturated weight of the matrix when the matrix is saturated by water before the plant is planted;

acquiring the real-time weight of the plant and the whole matrix through the weighing mechanism, and calculating the real-time reference irrigation amount by combining the fresh weight of the plant and the saturated weight of the matrix;

and acquiring the real-time water content of the matrix, and if the real-time water content of the matrix is smaller than an irrigation threshold, performing seedling tray irrigation based on the real-time reference irrigation quantity.

2. The tidal seedling monitoring and irrigation decision method as claimed in claim 1, wherein the obtaining of the real-time substrate moisture content comprises:

and calculating the water content of the matrix according to the saturated weight of the matrix and the fresh weight of the plants obtained after each irrigation and by combining the real-time weight and the dry weight of the matrix.

3. The tidal seedling monitoring and irrigation decision method as claimed in claim 1, wherein the irrigation threshold is determined according to the substrate saturation weight and the corresponding irrigation coefficient obtained after each irrigation;

Wherein the irrigation coefficient is determined according to the type of the seedling raising tray, the seedling raising type and the seedling raising period.

4. The tidal seedling monitoring and irrigation decision method as claimed in claim 1, wherein after calculating the fresh weight of the irrigated plant, the method further comprises:

determining fresh weight increment according to the fresh weight of the plants at the adjacent irrigation time, and determining the growth rate of the plants by combining the duration of the adjacent irrigation time;

determining the evapotranspiration amount according to the change value of the real-time weight of the substrate obtained by the weighing mechanism in unit time length, and determining the evapotranspiration rate of the plant by combining the unit time length.

5. The tidal seedling monitoring and irrigation decision method of claim 4, further comprising, after determining the evapotranspiration amount:

and determining the water utilization efficiency according to the fresh weight increment of the plants at the adjacent irrigation time and the corresponding evapotranspiration amount.

6. A tide type seedling culture monitoring and irrigation decision-making device is characterized by comprising:

the fresh weight calculation module is used for acquiring the saturated weight of the matrix when the plant and the matrix in the cultivation tank integrally reach a stable saturated state through the weighing mechanism after irrigation is finished each time, and calculating the fresh weight of the irrigated plant by combining the initial saturated weight of the matrix when the matrix is saturated by water before the plant is planted;

The water quantity calculation module is used for acquiring the real-time weight of the plant and the whole matrix through the weighing mechanism and calculating the real-time reference irrigation quantity by combining the fresh weight of the plant and the saturated weight of the matrix;

and the irrigation processing module is used for acquiring the real-time water content of the matrix, and if the real-time water content of the matrix is smaller than an irrigation threshold, the seedling raising tray is irrigated based on the real-time reference irrigation quantity.

7. A tide type seedling culture monitoring and irrigation decision-making system is characterized by comprising:

weighing mechanism, bearing mechanism, cultivation tray, gateway device and tide type seedling monitoring and irrigation decision-making device of claim 6;

the weighing mechanism is connected with the bearing mechanism, the cultivation hole tray is positioned above the bottom surface of the bearing mechanism, and plants are planted in the cultivation hole tray;

the weighing mechanism is provided with an antenna module and is used for sending the weight data acquired by the weighing mechanism to the tide type seedling monitoring and irrigation decision-making device through the gateway equipment.

8. The tidal nursery monitoring and irrigation decision system of claim 7, wherein the weighing mechanism comprises: the upper hook, the lower hook and the tension sensor; the tension sensor is connected to the bearing mechanism at the bottom through the lower hook;

The bearing mechanism comprises adjustable cross beams, and the adjustable cross beams are used for adjusting the distance between the cross beams so as to adapt to cultivation hole trays with different sizes;

the lower hook is connected with the bearing mechanism through a lifting rope, and the length of the lifting rope is adjusted to adapt to different growth heights of plants.

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the tidal grow monitoring and irrigation decision method of any of claims 1 to 5.

10. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of the tidal grow seedling monitoring and irrigation decision method of any of claims 1 to 5.

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