CN112924497A - Sensing device, sensing system and sensing method for water transfer in field - Google Patents
Sensing device, sensing system and sensing method for water transfer in field Download PDFInfo
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Abstract
The invention provides a field water-level-changing sensing device, a sensing system and a sensing method. The sensing device comprises a conductivity ruler which is provided with at least one detection point, and the at least one detection point is provided with a conductivity electrode group; the circuit unit is electrically connected with the electric conductivity measuring scale to provide voltage and/or current signals for the electric conductivity measuring scale and receive detection signals from the electric conductivity measuring scale; and the power supply unit module is electrically connected with the circuit unit to provide required power. The invention also provides a field sensing system which comprises a cloud server, at least one field water-filling sensing device and a remote monitoring platform server. Therefore, the invention can monitor the water depth and specific conductivity of the paddy field in real time so as to achieve the effects of optimizing water resource utilization, saving water consumption of the paddy field, reducing plant loss rate, managing fertilizer application amount of the paddy field, improving yield, quality, profit and the like. If the industrial wastewater pollutes the irrigation water of the paddy field, the system can be used for early warning.
Description
Technical Field
The present invention relates to the field of field water detection, and more particularly, to a field water detection device, a field water detection system, and a field water detection method that integrate an internet of things architecture, a field water detection device, and a field water detection system.
Background
Nowadays, because of environmental pollution problem, urbanization effect, excessive reclamation and felling, and change of rainfall form, available water resource is less and less, how to cope with climate change of natural world is a subject which must be faced by the whole world, and the management and management mode of water resource must be adjusted; in addition, the artificial improper destruction is required to be strictly regulated and completely executed, so that the management efficiency can be effectively improved. Therefore, management of water resources must be enhanced. By means of effective allocation and management, waste of water resources can be reduced, and the use efficiency of the water resources can be improved.
At present, the rice field is irrigated by manual operation for water distribution, so that the irrigation water quantity cannot be precisely controlled, and the water delivery loss in the control process cannot be precisely calculated. The phenomenon of uneven rainfall in the withered water period is more severe along with the change of climate, if the water can be used by the paddy field with the largest source of water consumption, the water can be saved by the technology of accurately allocating the water quantity, the water resource allocation space of different water consumption standards can be greatly improved, and the method belongs to the extremely important development field and direction at present.
The key to the field water management is to maintain the appropriate water depth, namely, after rice is transplanted, the appropriate flooding depth is maintained in a paddy field to buffer the adverse effect of the environment on the early growth stage of the rice. The time period for maintaining the water depth is about 30-35 days for the first period, about 20-25 days for the second period, and about 4-6 cm for the water depth. In addition, the appropriate water depth is helpful for improving the water and nutrient absorption of rice, and the reduction state of soil is maintained, so that the weed seeds cannot obtain enough growth opportunities, and the aim of effectively controlling weeds is fulfilled. Therefore, the exquisite water depth management of paddy fields is important for the growth of rice plants, i.e., the main reason why farmers walk the paddy field every day during rice cropping, in addition to the utilization of water resources related to irrigation of rice crops.
In recent years, rice production enhancement Systems (SRI) or deep water dense planting (DMP) is promoted internationally in rainy season due to climate change or regions with insufficient water resources; wherein, SRI adopts alternate irrigation (alternating Wet and Dry, AWD) and keeps different water depths in different rice growth periods, thus effectively saving the water consumption for irrigation, taking measures of soil ventilation, improving the ecological environment of paddy fields, improving the quality of return water, improving the quality of rice and the like. However, the method is more strict in controlling the exquisite water depth and is one of the main difficulties to be promoted.
As can be seen from the above, the skillful water depth management of rice fields is important for the growth of rice plants in addition to the utilization of water resources related to agricultural irrigation, but at present, an effective and immediate management method is still lacking, and the water resource management of rice fields and the production of rice are really problems to be solved urgently.
In addition to the above-mentioned management and control of water resources, Precision Agriculture (Precision Agriculture) is considered as the key of the third revolution of Modern Agriculture (Modern Agriculture), and a large number of Real-time sensors are used in Precision Agriculture to monitor the water consumption, humidity, NP nutrient salts, pH, EC and other data of crops, so as to improve the efficiency of agricultural production. Accurate agriculture is one of the practices of present agriculture is used to the thing networking in fact, outside promoting the irrigation water management efficiency in paddy field, improves the elasticity of the allotment of water resource.
Disclosure of Invention
In view of the above, the present inventors have developed an intelligent conductivity meter and further established an instant intelligent rice-field water and water quality management system by combining with internet to monitor the exquisite water depth and specific conductivity of rice field in real time so as to achieve the effects of optimizing water resource utilization, reducing plant loss rate, shortening production time, reducing pesticide application, and improving yield, quality and profit. In addition, the invention can also be used as the foundation for promoting the accurate agriculture of the paddy field.
In other words, the present invention can provide a field flood sensing device comprising: the electric conductivity ruler is provided with at least one detection point, and the at least one detection point is provided with an electric conductivity electrode group; the circuit unit is electrically connected with the electric conductance measuring scale, is used for providing a voltage signal and/or a current signal required by the electric conductance measuring scale and receives a detection signal from the electric conductance measuring scale; the circuit unit comprises an excitation signal source module, a signal processing and control module, a microprocessor, a display module, a data storage module, an output module and a control node module; the excitation signal source module is electrically connected with the electric conductance electrode group; the excitation signal source module is electrically connected with the signal processing and control module; the microprocessor is electrically connected with the signal processing and control module, the display module, the data storage module, the output module and the control node module; and a power supply unit module electrically connected with the circuit unit for providing required power.
According to an embodiment of the present invention, the electrical conductivity scale is further provided with at least one temperature detection point, and the at least one temperature detection point is provided with a temperature electrode group electrically connected to the excitation signal source module for detecting a water temperature of the region to be detected.
According to an embodiment of the present invention, the number of the at least one detection point is plural, and the distance between the detection points is in a range of 0.5cm to 5 cm; preferably in the range of 0.5 to 2.5 cm; more preferably in the range of 0.5 to 2.0 cm; preferably in the range of 0.5 to 1.0 cm.
According to an embodiment of the present invention, the driving signal source module is electrically connected to the conductance electrode sets of the plurality of detection points in parallel.
According to an embodiment of the present invention, the detection signal is an analog signal or a digital signal.
In addition, the present invention may also provide a field flood sensing system comprising: a cloud server; the field water-filling sensing device is connected with the cloud server through a wireless network and transmits conductivity information of at least one detection point to the cloud server; and the remote monitoring platform is connected with the cloud server through a wireless network so as to control the field water-filling sensing device and obtain the conductivity information of the at least one detection point, and then water-filling detection information is generated based on the position of the at least one detection point and the conductivity information.
According to an embodiment of the present invention, the water quality detection information at least includes one or more of a water level, a sediment depth, a fertilization status, a rainfall condition, and a water pollution status.
According to an embodiment of the present invention, the field water level sensor system further includes an input water gate controller and an output water gate controller connected to the remote monitoring platform for adjusting water flow in the input or output area to be measured.
According to an embodiment of the present invention, the remote monitoring platform is a smart phone, a tablet computer, a notebook computer, or a desktop computer.
The invention also provides a field water contamination sensing method which comprises the steps of 1, vertically inserting a conductivity ruler in a field water contamination sensing device into a region to be detected until the bottom end of the conductivity ruler contacts the ground for detection, and acquiring conductivity information of at least one detection point; and obtaining the water quality detection information based on the position of the at least one detection point and the conductivity information, wherein the water quality detection information at least comprises one or more of water level height, sediment depth, fertilization condition, rainfall condition and water pollution condition.
Drawings
FIG. 1 is a system architecture diagram of a field flood sensing system of the present invention.
Fig. 2 is a schematic structural diagram of the conductance scale 10 in fig. 1.
Fig. 3 is a schematic diagram of an internal architecture of the circuit unit 11 in fig. 1.
Fig. 4 is a diagram of a water balance system in embodiments 1 to 3 of the present invention.
FIG. 5 is a field simulation in examples 1 to 3.
Fig. 6A is a graph showing the change of the position of the detection point and the conductivity in example 1 and comparative example 1.
Fig. 6B is a graph showing the relationship between the position of the detection point and the conductivity in example 2 and comparative example 2.
Fig. 6C is a graph showing the relationship between the position of the detection point and the conductivity in example 3 and comparative example 3.
FIG. 7A is a graph showing the relationship between the position of the detection point and the conductivity in example 4.
FIG. 7B is a graph showing the relationship between the position of the detection point and the conductivity in example 5.
FIG. 8 is a graph showing the change in the fertilization amount and the conductance in example 6.
Fig. 9A and 9B are graphs showing the relationship between the position of the detection point and the conductivity of the sensor in example 7 before and after rain, respectively.
Wherein, 1: field water exposure sensing device, 10: conductivity scale, 101: conductance electrode group, 102: temperature electrode group, 11: circuit unit, 111: excitation signal source module, 112: signal processing and control module, 113: microprocessor, 114: display module, 115: data storage module, 116: output module, 117: control node module, 12: power supply unit, 2: cloud server, 3: and (5) a remote monitoring platform.
Detailed Description
The following detailed description and specific examples are given for purposes of illustration and description, and are not intended to limit the scope of the invention; however, it should be understood by those skilled in the art that the present invention is not limited to these examples, and other equivalent functions and steps can be used to achieve the same purpose.
The scientific and technical terms used herein have the same meaning as commonly understood and used by one of ordinary skill in the art to which this invention belongs. Furthermore, as used herein, the singular tense of a noun, unless otherwise conflicting with context, encompasses the plural of that noun; the use of plural nouns also covers the singular form of such nouns.
In this context, the values and parameters defining the scope of the invention are inherently related to the standard deviation found in its respective testing method, and are therefore usually expressed in approximate numerical values, although the numerical values are expressed as precisely as possible in the specific examples. As used herein, "about" generally refers to a value within an acceptable standard deviation of the mean, typically in view of a consideration by those of ordinary skill in the art, e.g., within ± 10%, 5%, 1%, or 0.5% of a particular value or range.
First, refer to fig. 1, which is a system architecture diagram of a field water filling sensing system according to the present invention. The field water-quality detection system is used for providing water-quality detection information for at least one user, and comprises a field water-quality detection device 1, a cloud server 2 and a remote monitoring platform 3 to form a distributed monitoring system.
The field water filling sensing device 1 comprises a conductivity scale 10, a circuit unit 11 and a power supply unit 12. Please refer to fig. 2, which is a schematic structural diagram of the conductance scale 10. The conductivity meter 10 is used as a sensing probe, and can be vertically inserted into the region to be detected to detect the current signal, and transmit the current signal to the circuit unit 11 for analysis and processing. The power supply unit 12 is electrically connected to the circuit unit 11 for providing power for the circuit unit 11 during operation.
Please refer to fig. 2, which is a schematic structural diagram of the conductance scale 10. The conductivity ruler 10 is provided with scales, a plurality of detection points are arranged on the ruler surface, and a conductivity electrode group 101 and a temperature electrode group 102 are respectively arranged on the detection points. The conductivity electrodes 101 at different positions are used for detecting conductivity values at different water levels, and the temperature electrodes 102 are used for detecting a water temperature.
It should be understood by those skilled in the art that the illustrations and the numbers of the conductive electrode groups 101 and the temperature electrode groups 102 shown in fig. 2 are merely examples, and the number, the material, the appearance, the arrangement, and the pitch of the electrode groups may be adjusted based on the type of liquid, the water level, and the water level. For example, the distance between the electric conductance electrode groups 101 may be in a range of 0.5cm to 5 cm; preferably in the range of 0.5 to 2.5 cm; more preferably in the range of 0.5 to 2.0 cm; preferably in the range of 0.5 to 1.0 cm. In addition, the kind of the electric conductivity electrode group and the temperature electrode group may be a bipolar type electrode or a quaternary type electrode.
According to the technical idea of the invention, when the conductivity measuring ruler 10 is vertically inserted into a region to be measured, the bottom end of the ruler body can be connected and fixed on the ground by using a metal gasket, a screw or a nail, so that the ruler body is prevented from falling; in addition, an element with a tip structure may be optionally added to the bottom of the electrical conductivity scale 10, so that the electrical conductivity scale 10 can be easily inserted into the sediment or soil layer.
Next, please refer to fig. 3, which is a schematic diagram of an internal structure of the circuit unit 11. The circuit unit 11 includes an excitation signal source module 111, a signal processing and control module 112, a microprocessor 113, a display module 114, a data storage module 115, an output module 116, and a control node module 117. The electric conductance electrode set 101 and the temperature electrode set 102 in the electric conductance ruler 10 are electrically connected to the excitation signal source module 111 in parallel; the excitation signal source module 111 is electrically connected with the signal processing and control module 112; the microprocessor 113 is electrically connected to the signal processing and control module 112, the display module 114, the data storage module 115, the output module 116, and the control node module 117.
The excitation signal source module 111 is configured to transmit a voltage signal and/or a current signal to the conductance electrode set 101 and/or the temperature electrode set 102 in the conductance ruler 10; after receiving the voltage signal and/or the current signal, the conductance electrode set 101 and/or the temperature electrode set 102 generate a corresponding detection signal, and transmit the detection signal to the signal processing and control module 112 through the excitation signal source module 111, where the detection signal may be an analog signal or a digital signal. Then, the signal processing and control module 112 processes the detection signals transmitted from the conductance electrode set 101 and/or the temperature electrode set 102 and sends the processed detection signals to the microprocessor 113.
The microprocessor 113 receives the detection signal from the signal processing and control module 112, performs operation and analysis to obtain conductivity information and temperature information, and then sends the conductivity information and the temperature information to the display module 114 and the data storage module 115; the display module 114 is used for receiving and displaying the conductivity information and the temperature information sent by the microprocessor 113, and the data storage module 115 is used for receiving and storing the conductivity information and the temperature information sent by the microprocessor 113.
The output module 116 is used for receiving the conductivity information and the temperature information of the microprocessor 113, and outputting and sending the conductivity information and the temperature information to the remote monitoring platform 2 as an analog signal or a digital signal; the control node module 117 is used for receiving control signals from the microprocessor 113 and taking corresponding output signals to open (open) or close (close).
Next, the actual operation flow of the circuit unit 11 is described as follows:
the excitation signal source module 111 provides a voltage signal and/or a current signal required by the conductance electrode set 101 and/or the temperature electrode set 102, the conductance electrode set 101 and/or the temperature electrode set 102 detects a region to be detected to generate an analog or digital signal, the analog or digital signal is transmitted to the signal processing and control module 112 through the excitation signal source module 111 and converted into processable digital or analog data to the microprocessor 113, the microprocessor 113 obtains measurement values such as conductance (or analog set value) and temperature value after internal operation and analysis, and transmits the measurement values to the display module 114 for display, storage in the data storage module 115, and transmission to the remote monitoring platform 2 through the output module 116. In addition, the microprocessor 113 can also receive the control command from the remote monitoring platform 2 to control the circuit operation, and automatically drive the control node module 117 according to the measured value, so as to open or close the output signal.
The remote monitoring platform 3 can obtain conductivity data and temperature data of each detection point in the field water-quality sensing device 1 through the cloud server 2, store, analyze and process information to generate and display water-quality detection information of a region to be detected, wherein the water-quality detection information comprises at least one of water level height, water-quality temperature, bottom mud depth, fertilization condition, rainfall condition and water pollution condition. After the field water quality detection device 1 arranged in the paddy field operates, the field water quality detection device is transmitted to the cloud server 2 through the internet, the remote monitoring platform 3 can acquire the data through the cloud server 2, and any user logs in through an account of an application program and obtains the water quality detection information after data processing of the remote monitoring platform 3 through operation. If the remote monitoring platform used by the user is a mobile phone, the water contamination detection information can be read by the user through an application program on the mobile phone.
Since the voltage and/or current signals applied to each conductance electrode group 101 by the circuit unit 11 are fixed values, the microprocessor 113 processes and analyzes the detection signals obtained by the conductance ruler 10, and then obtains the resistance value by ohm's law conversion, and then obtains the conductance by conversion using the following conductance formula:
k＝G×K
wherein k is the conductance (S/cm);
g is the conductance (S), and G ═ I ÷ V ÷ 1 ÷ R, (R is the resistance),
k is the electrode constant.
Next, the following specific examples illustrate detection methods using the field water contamination sensing device of the present invention.
Examples 1 to 3
In the embodiments 1 to 3, an irrigation area with rice as a main cultivation crop is selected, then the whole area size of a scale is determined according to a google map, then the site exploration is carried out, the positions of a water inlet channel and a water outlet channel are determined, a simulation diagram of the site is drawn, and a mass conservation system is established.
The principle of the water balance system of the paddy field is mainly established by the definition of the water balance system in the hydrology. In this embodiment, a field of several blocks of a field and a ditch for irrigation and drainage are assumed to be a closed water balance system, and the amount of water stored in the system is assumed to be W0Then, let the irrigation canal inflow be QinThe output flow rate is QoutWhile the loss of water delivery and the loss of rice in the field divide it into Evapotranspiration (ET)corp) Leakage amount (P)t+Lt) And trench loss (Q)lost) The parameters are calculated into the water balance system of the present embodiment, the following equation I is obtained and plotted into the water balance system diagram as shown in fig. 4, and the actual measurement is also performed according to the required parameters.
W0＝Qin-[ETcorp+Qlost+(Pt+Lt)]-Qout………..I
Wherein the content of the first and second substances,
W0is the water retention in the irrigation zone;
Qinthe water flow of the ditch into the irrigation area;
Qoutthe water flow of the irrigation area is output by the ditch;
ETcorpis the water evapotranspiration of the crop in the irrigation zone;
Qlostis the amount of water loss in the trench;
(Pt+Lt) Is the amount of leakage in the irrigation area; ptFor vertical leakage, LtThe amount of lateral leakage.
In addition, the inflow and outflow positions of the paddy field can be known and measured according to the field simulation diagram shown in fig. 5, the flow can be converted by the Manning formula according to the water level measurement and the flow rate measurement of the inflow and outflow, and the water quantity of the system can be calculated, and besides the input and output of the system, the loss of other systems in the paddy field still exists, such as ditches, leakage, crop evapotranspiration and the like. If the water level difference between the area A and the area C is measured by a conductivity scale in a larger field area, the system input of the field area can be obtained, and the output difference is observed at a specific system output point, the system variation of the field area can be obtained, and the mass conservation can be achieved as much as possible.
After the measurement area is mastered, the conductivity measuring ruler in the field water filling sensing device is vertically inserted into the water inlet channel, the water inlet of the paddy field and the center of the paddy field until the bottom end of the conductivity measuring ruler contacts the ground and detection is carried out.
The conductivity meter used in the field water-flood sensing device in examples 1 to 3 had 10 detection points, wherein detection point 1 was located at a distance of 2 cm from the bottom end of the conductivity meter, and detection points 2 to 10 were sequentially arranged at a distance of 1 cm. Then, the conductivity value measured by the field water-filling sensing device is transmitted to a remote monitoring platform (a smart phone or a tablet personal computer) through a wireless network.
After each zone was measured 20 times, the measured conductivity values were averaged and the values are recorded in table 1. Since the conductivity of air is close to 0, the conductivity of water is between about 300 and 400 μ S/cm, and the conductivity of bottom mud is between about 100 and 200 μ S/cm, the depth of water filling can be known from the measured conductivities.
Comparative examples 1 to 3
In comparative examples 1 to 3, measurement was conducted by fixing a commercially available conductivity meter to a plastic ruler, and the measurement areas were the same as in examples 1 to 3, and after measuring each area 20 times, the measured conductivity values were averaged and the values are recorded in table 1.
TABLE 1
Next, the data results of table 1 are plotted as fig. 6A to 6C, respectively, in which fig. 6A is a comparison graph of the result data of example 1 and comparative example 1, fig. 6B is a comparison graph of the result data of example 2 and comparative example 2, and fig. 6C is a comparison graph of the result data of example 3 and comparative example 3.
As can be seen from the results of fig. 6A to 6C, when measured by the field flood sensing device of the present invention, the water level of the water inlet channel was between about 7 cm and about 8 cm, and no sludge existed in the water; the water level height of the water inlet of the paddy field is about 7-8 cm, and a large amount of bottom mud exists in the water; and the water level in the center of the paddy field is about 5-6 cm, and a large amount of bottom mud exists in the water.
As can be seen from the results of fig. 6A to 6C, similar results were obtained when the field water level sensor according to the present invention and the commercial conductivity meter were measured, respectively, and it was revealed that the field water level sensor according to the present invention can be connected to the internet of things to constitute a field water level sensing system instead of the commercial conductivity meter.
Examples 4 to 5
In examples 4 and 5, the field water sensor device of the present invention was used to measure at two different irrigation water channels (zone a and zone B), the conductivity scale in the field water sensor device was inserted vertically until the bottom end of the conductivity scale touches the ground, and the measured conductivity value was transmitted to a remote monitoring platform (smart phone or tablet computer) via a wireless network.
The conductivity meter used in examples 4 and 5 of the field flood sensing device had 7 detection points, wherein detection point 1 was located at a distance from the bottom end of the conductivity meter, and detection points 2 to 7 were sequentially arranged at a distance of 5 cm.
After measuring 20 times, the measured conductivity values were averaged and the values are recorded in table 2.
TABLE 2
Next, the data results of table 2 are plotted in fig. 7A and 7B, respectively. As can be seen from the results shown in Table 2 and FIG. 7A, the water level in the region A is about 20-25 cm, and the sediment depth is about 5-10 cm; in addition, as can be seen from the results shown in Table 2 and FIG. 7B, the water level of the region B is about 25 to 30 cm, and the sediment depth is about 5 to 10 cm.
Example 6
The irrigation water and the fertilizer were prepared in the concentrations shown in table 3, and then the electric conductivity thereof was measured by a field water sensor and a commercially available conductivity meter according to the present invention, respectively, and the obtained values were recorded in table 3.
TABLE 3
Then, the numerical results in Table 3 were plotted as FIG. 8 and subjected to regression analysis, and the results of the conductivity measured by the field water-filling sensor of the present invention were obtained according to the following equation II (R)2＝0.9981)：
y＝11.943x+521.63…….II
In addition, the measured conductivity values obtained by a commercially available conductivity meter were in accordance with the following equation III (R)2＝0.9999)
y＝11.943x+521.63 11.868x+555.04…..III
As is clear from the above results, since the content of the fertilizer in the water sample also affects the numerical value of the conductivity, and the conductivity value of the irrigation water increases as the content of the fertilizer increases, the content of the fertilizer in the water sample can be obtained by converting the conductivity value obtained by the field water sample sensor of the present invention by drawing a calibration curve based on the relative relationship between the content of the fertilizer and the conductivity in the water sample. Therefore, whether the front-end residual fertilizer is contained in the return water before and after the paddy field is judged, and the return water is used as nitrogen and phosphorus fertilizer addition management of the downstream irrigation field.
Example 7
The conductivity change of the irrigation ditch before and after rain is measured by the field water filling sensing device, the measured conductivity value is transmitted to a remote monitoring platform (a smart phone or a tablet personal computer) through a wireless network, and the value is recorded in a table 4.
The conductivity meter used in the device for sensing water flood in the field has 8 detection points, wherein the detection point 1 is located at a distance from the bottom end of the conductivity meter, and the detection points 2 to 7 are sequentially arranged at a distance of 5 cm.
TABLE 4
Next, the results of table 4 are plotted as fig. 9A and fig. 9B, respectively, where fig. 9A is a graph showing the change in the depth of water and the electrical conductivity before raining, and fig. 9B is a graph showing the change in the depth of water and the electrical conductivity after raining.
It can be seen from FIGS. 9A and 9B that the conductivity and water level in the trench changed before and after the rain. It can be seen that the water level of the ditch after raining rises, and the rainwater dilutes the original fertilizer, so that the conductivity value of each detection point is reduced.
Therefore, the remote monitoring platform in the field flood sensing system of the present invention may further be communicatively connected to an input water gate controller and an output water gate controller for regulating the flow of water into or out of the ditch of the irrigation area. Therefore, the water level and the opening and closing of the sluice gate can be remotely controlled, and the adjustment can be carried out according to certain ditch sections without going to the field for investigation by personnel.
Furthermore, the conductivity is measured at fixed time and fixed points by using the field water filling sensing device, relevant data are transmitted to the cloud server in cooperation with field sampling analysis, and meanwhile, a large database can be established in cooperation with monitoring data under general conditions so as to optimize distribution of water supply of regional rice fields. And the monitoring value can judge whether the external pollution (especially the industrial drainage) changes the water quality to cause the change of the conductivity.
Therefore, the field water quality detection device and system according to the present invention can obtain water quality detection information on water level, sludge depth, fertilization status, rainfall status, water quality change, and the like.
Thus, the results of the above examples confirm that the present invention has the following advantages:
1. under the condition of facing to the shortage of water resources and the difficulty of allocation, the invention can provide a systematized and Real-time paddy field water management system for paddy field water with high proportion of water.
2. The conductivity measured by the field water filling sensing device provided by the invention is vertically changed on an irrigation channel and the water surface of a field, so that the water level and the bottom mud depth of agricultural irrigation and drainage and a paddy field can be known simultaneously. In addition, the agricultural water is often polluted by the discharge of industrial wastewater, and the time change of the conductivity is often related to the abnormal water quality of the agricultural water, so the conductivity can also be used for early warning the abnormal water quality of the agricultural water.
3. The field water changing sensing system has the functions of real-time monitoring, calculation and estimation, and can effectively manage field water according to the difference of elevation change of paddy fields, soil properties, crop planting situations and weather conditions of irrigation systems of various areas.
4. The field water-changing sensing system disclosed by the invention simultaneously utilizes the concept of the Internet of things, can be provided for farmers, so that the depth and the conductivity of farmlands cultivated by the farmlands can be monitored by the mobile phone APP (P2M) to reduce the workload of water patrol of the farmers, and simultaneously, the information provided by a farmland water conservancy management unit can be used for optimally managing the water supply and water quality monitoring of paddy fields (P2M) and (M2M). If the automatic sluice gate is combined with the opening depth control, the water depth management of the field can be achieved, and the water management of the water bank is facilitated.
5. Due to the fact that rainfall is different and the available water resource amount of agricultural water is different year by year, the field water filling sensing system can be used for establishing situation simulation of irrigation areas under the condition of different irrigation water resource amounts, and establishing an optimal management strategy of irrigation water of a paddy field and analysis of water resource management benefits.
The present invention has been described in detail by way of examples in the embodiments listed above, but the present invention is not limited to these embodiments. It will be appreciated by those of ordinary skill in the art that: various changes and modifications can be made without departing from the spirit and scope of the invention; for example, the technical contents exemplified in the above embodiments are combined or changed to new embodiments, and such embodiments are also regarded as the contents of the present invention. Therefore, the protection sought herein also includes the claims and their limitations.
Claims (10)
1. A field water exposure sensing device, comprising:
the electric conductivity ruler is provided with at least one detection point, and the at least one detection point is provided with an electric conductivity electrode group;
the circuit unit is electrically connected with the electric conductance measuring scale, is used for providing a voltage signal and/or a current signal required by the electric conductance measuring scale and receives a detection signal from the electric conductance measuring scale; the circuit unit comprises an excitation signal source module, a signal processing and control module, a microprocessor, a display module, a data storage module, an output module and a control node module; wherein
The excitation signal source module is electrically connected with the electric conductance electrode group;
the excitation signal source module is electrically connected with the signal processing and control module;
the microprocessor is electrically connected with the signal processing and control module, the display module, the data storage module, the output module and the control node module; and
and the power supply unit module is electrically connected with the circuit unit and is used for providing required power.
2. The device for sensing water exposure in a field according to claim 1, wherein the conductivity scale is further provided with at least one temperature detection point, and the at least one temperature detection point is provided with a temperature electrode group electrically connected to the excitation signal source module for detecting the water temperature in the region to be detected.
3. The field water exposure sensing device according to claim 1, wherein the at least one detection point is plural, and the pitch of the detection points is in a range of 0.5-5 cm.
4. The field water exposure sensing device of claim 3, wherein the excitation signal source module is electrically connected in parallel with the sets of conductance electrodes in the plurality of detection points.
5. The device of claim 1, wherein the detection signal is an analog signal or a digital signal.
6. A field water exposure sensing system, comprising:
a cloud server;
the at least one field water exposure sensing device of any one of claims 1-5, connected to the cloud server via a wireless network, and configured to transmit conductivity information of the at least one sensing point to the cloud server; and
the remote monitoring platform is connected with the cloud server through a wireless network to control the water quality detection device, obtains the conductivity information of the at least one detection point, and generates water quality detection information based on the position of the at least one detection point and the conductivity information.
7. The field water quality sensing system of claim 6, wherein the water quality detection information at least comprises one or more of water level, sediment depth, fertilization status, rainfall status, and water pollution status.
8. The system of claim 6, further comprising an input water gate controller and an output water gate controller connected to the remote monitoring platform for regulating water flow into or out of the area under test.
9. The field water exposure sensing system of claim 6, wherein the remote monitoring platform is a smartphone, a tablet, a laptop, or a desktop computer.
10. A field water-bloom sensing method is characterized by comprising the following steps:
vertically inserting a conductivity scale in the field water exposure sensing device according to any one of claims 1 to 5 into a region to be detected until the bottom end of the conductivity scale contacts the ground for detection, and acquiring conductivity information of the at least one detection point; and
obtaining water detection information based on the position of the at least one detection point and the conductivity information; wherein
The water-filling detection information at least comprises one or more of water level height, sediment depth, fertilization condition, rainfall condition and water pollution condition.
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