CN105580716A - Large-area multi-field-piece automatic water-saving irrigation three-level control system and use method thereof - Google Patents

Abstract

The invention relates to a three-level control system for large-area multi-field automatic water-saving irrigation and its use method. The three-level control system includes a remote monitoring platform, at least one monitoring station and several monitoring terminals; the distance between the remote monitoring platform and the monitoring station The data communication is carried out by GPRS, and the data communication is carried out by the ZigBee network between the monitoring station and the monitoring terminal. Collect the temperature and humidity data of the field through the temperature and humidity sensor of the monitoring terminal and compare it with the temperature and humidity threshold value pre-stored in the ZigBee module of the monitoring terminal. When the conditions are met, an irrigation request is sent to the monitoring station. Modify the temperature and humidity threshold and send it to the monitoring station. The three-level control system of the present invention can realize automatic water-saving irrigation control of multiple fields in a large area, save labor cost, save water resources, and can perform manual intervention to achieve reasonable water-saving irrigation.

Description

Three-level control system for large-area multi-field automatic water-saving irrigation and its application method

technical field

The invention relates to a three-level control system for large-area multi-field automatic water-saving irrigation and a method for using the same, belonging to the technical field of automatic irrigation.

Background technique

The increasing scarcity of fresh water resources and the gradual increase of labor costs have made automatic water-saving irrigation technology an important direction for the development of modern agriculture, forestry, animal husbandry, and sideline water irrigation. At present, for my country's large-scale agricultural land transfer and cooperative management, especially in the vast Northeast and Northwest regions, such as agriculture, forestry, animal husbandry, and sideline bases, how to realize automatic water-saving irrigation control for large-scale multi-field plots has become a prominent problem that needs to be solved.

In recent years, research on correlation irrigation control technology and methods has made some progress. Among them, the Chinese patent document CN102037888A discloses a "distributed network automatic irrigation control system and its irrigation application method". A two-level distributed control system composed of irrigation units. The patent patent "Remote Automatic Irrigation System and Application Method Based on Public Communication Network" with the publication number CN1951170A has constructed a two-level irrigation automation system composed of a central control level and a field control level. However, the lower-level control system in these technical methods only uses a single processor (CPU) to complete tasks such as sensor detection, solenoid valve control, and data communication in the field. There are problems: (1) There are many distributed connections, which makes layout adjustment difficult ; (2) The hardware resources of the existing controller are limited and fixed, and it is difficult to expand, so it is not suitable for large-scale fields; (3) As a whole, the system lacks an important link of irrigation water supply regulation and control, and cannot realize the constant pressure water supply of the water supply pipeline supply.

In addition, when multiple fields with different crops are planted in a large area, the existing irrigation technology cannot set different irrigation modes according to different crops, and the application is relatively single. Therefore, it is urgent to design an irrigation system for different crops in multiple fields in a large area.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a three-level control system for automatic water-saving irrigation of large-area multi-field plots.

The present invention also provides a method for using the three-level control system for automatic water-saving irrigation in large areas and fields for irrigation.

Technical scheme of the present invention is as follows:

A three-level control system for automatic water-saving irrigation of large-scale multi-field plots, including a remote monitoring platform, at least one monitoring station and several monitoring terminals; data communication between the remote monitoring platform and the monitoring station is carried out in the form of GPRS, and between the monitoring station and the monitoring terminal Data communication with ZigBee network;

The remote monitoring platform includes a server;

Described monitoring station comprises single-chip microcomputer, water pump frequency conversion controller, water supply pressure sensor, GPRS module and ZigBee module; connect;

The monitoring terminal includes a ZigBee module, a soil temperature and humidity sensor, a solenoid valve drive circuit, and a solenoid valve; the ZigBee module is electrically connected to the soil temperature and humidity sensor and the solenoid valve drive circuit, and the solenoid valve drive circuit is electrically connected to the solenoid valve.

Preferably, the monitoring station further includes a three-phase electricity metering chip and a remote metering water meter, and the three-phase electricity metering chip and the remote metering water meter are respectively connected electrically to the single-chip electromechanical device. The advantage of this design is that by installing the three-phase electric metering chip and the remote metering water meter, the single-chip microcomputer can obtain the electricity consumption data and each irrigation water consumption or the cumulative water consumption data, which is convenient for regulating the irrigation process.

Preferably, the monitoring terminal also includes a solar panel, a rechargeable battery and a battery charging management circuit, the solar panel is connected to the rechargeable battery through the battery charging management circuit, and the rechargeable battery is connected to the ZigBee module, the soil temperature and humidity sensor and the solenoid valve drive circuit respectively. electrical connection. The advantage of this design is that it uses solar clean energy to provide power resource support for monitoring terminals.

Preferably, the single-chip microcomputer selects an STM32F103 chip. The advantage of this design is that this type of chip is cost-effective and has multiple serial interfaces. It has great economic advantages for irrigation water supply control, electricity consumption and water consumption measurement, and data communication control.

Preferably, the water supply pressure sensor is GB-3000FS pressure sensor. Install this type of pressure sensor on the main water supply pipe to test the water supply pressure of the main pipe.

Preferably, the three-phase electricity metering chip is RN8302B chip. The advantage of this design is that the single-chip microcomputer obtains the power consumption data of the monitoring station through the SPI serial port.

Preferably, the GPRS module is an M35 module. The advantage of this design is that the single-chip microcomputer uses the M35 module to perform data communication with the remote monitoring platform, receive irrigation control parameters and manual intervention instructions sent by the remote monitoring platform, or send water metering, power consumption information, equipment status information, and land to the monitoring platform. Moisture information, etc.

Preferably, the ZigBee module in the monitoring terminal and the ZigBee module in the monitoring station use the same type of ZigBee module, and the ZigBee module uses the enhanced 8051CPU chip CC2530 module. The advantage of this design is that this type of ZigBee module integrates multiple functions of 2.4GHzIEEE802.15.4, ZigBee and RF4CE. The MCU uses this type of ZigBee module to network with several ZigBee modules on the monitoring terminal for data communication, and receives the data from the monitoring terminal. Irrigation request information, status information, land moisture information, or send irrigation control parameters, irrigation instructions, etc. to the monitoring terminal.

Preferably, the solenoid valve is an IBV-101G DC solenoid valve. This type of DC solenoid valve is used to control the opening and closing of irrigation water in a water branch pipeline in the field.

Preferably, the solenoid valve drive circuit is a step-up conversion circuit. The advantage of this design is that the boost conversion circuit converts the energy stored in the rechargeable battery into the working power of the solenoid valve. The ZigBee module on the monitoring terminal uses an output terminal to control the output of the solenoid valve drive circuit in a level manner, such as: output control When the terminal outputs a high level, the solenoid valve drive circuit outputs energy to open the battery valve, and when the output control terminal outputs a low level, the solenoid valve drive prohibits output energy and closes the battery valve.

Preferably, the soil temperature and humidity sensor is an STH11 integrated temperature and humidity sensor. The advantage of this design is that the temperature and humidity integrated sensor is installed on the typical sampling point of the land irrigated by the water branch, and the ZigBee module in the monitoring terminal reads the soil temperature and humidity sensed by the temperature and humidity integrated sensor through the serial port. Information, so as to control the opening or closing of the electromagnetic valve of the road, and the integrated soil temperature and humidity sensor is used with high integration, low cost, convenient construction and installation, and saves construction time.

Preferably, the solar battery panel is made of polysilicon material. The advantage of this design is that the solar cell works stably and the cost is low, and the capacity of the solar cell panel depends on the working power consumption of the solenoid valve.

Preferably, the rechargeable battery is a lithium polymer battery. The advantage of this design is that the lithium battery has high capacity, small size, light weight and good safety.

Preferably, the battery charging management circuit is a charging management integrated circuit with a solar battery maximum power point tracking function. The benefit of this design is that it can automatically track the maximum power point of the solar panel and efficiently convert the solar energy to the rechargeable battery.

Further preferably, the battery charging management circuit uses CN3791 charging management integrated circuit.

A method for using a three-level control system for automatic water-saving irrigation of large-area multi-field plots, comprising the following steps:

(1) The soil temperature and humidity sensor at the sampling point collects the temperature and humidity data on the field in real time, and transmits the temperature and humidity data to the ZigBee module of the monitoring terminal;

(2) After the ZigBee module of the monitoring terminal receives the temperature and humidity data, it is compared with the upper and lower limit thresholds of soil moisture and the upper limit threshold of soil temperature stored in the ZigBee module of the monitoring terminal. , the monitoring terminal sends irrigation request information to the monitoring station through the ZigBee module;

(3) The monitoring station decides whether to start irrigation and water supply according to the request information sent by the monitoring terminal. If it is determined that irrigation is required, the monitoring station sends an irrigation command to the monitoring terminal and sends a start work command to the frequency conversion controller of the water pump. The frequency conversion controller of the water pump drives The water pump motor delivers irrigation water with a set pressure to the main water supply pipeline, and the monitoring terminals that receive the irrigation start command and the soil moisture does not reach the upper threshold of the soil moisture all open the water branch solenoid valve for irrigation operation;

(4) When the monitoring terminal detects that the soil moisture reaches the upper threshold of soil moisture, the monitoring terminal closes the solenoid valve of the water branch and sends the irrigation end information to the monitoring station, and the monitoring station judges whether the irrigation process needs to be terminated based on the received irrigation end information If it is necessary to end the irrigation process, the monitoring station will send an end work command to the water pump frequency conversion controller to stop the irrigation water supply.

Preferably, the remote monitoring platform sends the modified upper and lower thresholds of soil moisture and the upper threshold of soil temperature to the monitoring station through GPRS network communication, and the monitoring station stores the modified upper and lower thresholds of soil moisture and the upper threshold of soil temperature after receiving the modified soil moisture upper and lower thresholds. In the ZigBee module, the monitoring station uses its own ZigBee module to send the modified upper and lower thresholds of soil moisture and the upper threshold of soil temperature to the monitoring terminal and store them in the ZigBee module of the monitoring terminal.

Preferably, the remote monitoring platform is provided with a network client access function, and authorized management personnel can log in to the remote monitoring platform interface on any computer that can access the Internet, and manually modify a certain period of time when it is about to rain according to the weather forecast. Set the upper and lower thresholds of soil moisture in some fields, or set irrigation prohibition instructions for certain fields within a certain period of time when it is about to rain, and send them to the corresponding monitoring stations that need adjustment or irrigation prohibition control through GPRS network communication.

The beneficial effects of the present invention are:

1. The present invention sets up an automatic water-saving irrigation three-level control system consisting of a remote monitoring platform, at least one monitoring station and several monitoring terminals. A remote monitoring platform can manage hundreds of monitoring stations, and a monitoring station is responsible for For irrigation water supply control in local areas, several monitoring terminals complete the irrigation control of an independent field. Therefore, the three-level control system can realize automatic water-saving irrigation control of multiple fields in a large area, saving labor costs and water resources.

2. Using the low-cost multi-CPU wireless networking communication technology, improve the existing technology of using one CPU to manage and control all data collection, on-off control, and communication with the monitoring center in one field. One monitoring terminal is only responsible for one Soil temperature and humidity sensor detection and a water branch electromagnetic valve control overcome the problem of difficult layout and adjustment caused by long-distance and complex connections to a CPU in the prior art with less equipment cost investment.

3. The present invention adopts a multi-CPU network building block combination method, which is not limited by the number of irrigation water branches. No matter how many water branches there are in the field, as long as an equal number of monitoring terminals are installed for corresponding control, resources can be used without waste. Realizing automatic water-saving control, it is very suitable for automatic water-saving irrigation control of different areas, especially large-scale fields, and overcomes the expansion difficulty or waste of resources caused by the fixed product port resources in the existing technology.

4. The monitoring station in the present invention is used for the frequency conversion and speed regulation constant pressure water supply control of the main pipeline of the field, and the constant pressure water supply is provided only when the field needs to be irrigated, so as to prevent the problem that the pipeline may reduce the working life due to long-term overpressure, and at the same time It ensures the balanced water supply of each water branch, saves water and electricity and ensures consistent irrigation effects. This technology is what the prior art lacks.

5. According to different growth stages of different types of crops on different fields, irrigation water control schedules based on manual experience are compiled, and soil temperature and humidity control parameters are automatically adjusted according to time changes to achieve water-saving irrigation control in line with crop growth laws.

6. Managers can access the remote monitoring platform through any computer that can access the Internet according to the authority, check the irrigation process and equipment status, and can manually intervene in the irrigation process according to rainfall weather forecasts, etc., to achieve water saving and Waterlogging and other purposes.

7. All monitoring terminals are powered by solar energy with the maximum power point tracking function of solar cells, which effectively solves the problem of power supply for monitoring terminals and the problem of high-efficiency conversion.

8. The remote monitoring platform uses an electronic map to display the irrigation situation, check the soil moisture content, and equipment status. Once a problem or failure occurs, it is clear at a glance, which is convenient for system maintenance; the remote monitoring platform only downloads irrigation control parameters to the monitoring station when the time node changes. During other working hours, it only receives equipment failure information, etc., and the communication data flow is small, which saves communication costs.

Description of drawings

Fig. 1 is a schematic diagram of the structure and principle of the automatic water-saving irrigation three-level control system of the present invention.

Among them: 1 is the remote monitoring platform; 2 is the monitoring station; 3 is the monitoring terminal; 4 is the GPRS module; 5 is the single-chip microcomputer; 6 is the ZigBee module; 7 is the three-phase electric metering chip; Pressure sensor; 10 is remote metering water meter; 11 is soil temperature and humidity sensor; 12 is ZigBee module; 13 is solenoid valve driving circuit; 14 is solenoid valve; 15 is solar panel; 16 is battery charging management circuit; 17 is charging Battery.

detailed description

The present invention will be further described below through the embodiments and in conjunction with the accompanying drawings, but not limited thereto.

Example 1:

This embodiment provides a three-level control system for large-area multi-field automatic water-saving irrigation, which is introduced with two fields. The three-level control system includes a remote monitoring platform, at least one monitoring station and multiple monitoring terminals; among them, the data communication between the remote monitoring platform and the monitoring station is carried out in the form of GPRS, and the data communication is carried out between the monitoring station and the monitoring terminal through the ZigBee network .

The remote monitoring platform 1 selects a server with monitoring software installed and a public network IP. Among them, the monitoring software is a management application program for automatic water-saving irrigation control compiled using technologies such as databases, tables, electronic maps, network clients, and network communications. The location and boundary of the field and the icons of the location of the monitoring station 2 and the monitoring terminal 3. The color of the icon of the monitoring terminal 3 represents the degree of soil dryness and humidity at the location of the monitoring terminal 3 according to the colorful colors. Red represents drought, while purple represents Waterlogged, the color of the icon is automatically refreshed periodically according to the received soil moisture information; when the mouse moves to an icon, further information will automatically pop up, such as crop type, growth stage, equipment status information, etc.; ②In the form of a menu item table Formulate an irrigation plan control table, which includes the soil properties and components of each independent field, crop types and growth stages, land temperature and humidity control parameters (temperature upper limit, humidity upper and lower limits) and corresponding adjustment time nodes, as well as irrigation power consumption, Statistical data of water consumption; ③Administrators can use any computer with Internet access to log in to the remote monitoring platform 1 for client network access, check land moisture, equipment information or modify irrigation control parameters, etc. (It should be noted that the development of the monitoring software and the programming of the program are mainly based on traditional experimental data and expert experience).

In view of the fact that the irrigation interval is counted in days, and the amount of communication data between the remote monitoring platform 1 and each monitoring station 2 is limited, low-cost entry-level server products (such as Yingxin NF3025M3) can be used to meet the automatic saving of hundreds or thousands of fields. Water irrigation control; as long as there is a communication network coverage, the monitoring station 2 can communicate with the remote monitoring platform 1 to realize automatic water-saving irrigation control.

The monitoring station 2 includes a single-chip microcomputer 5 , a water pump frequency conversion controller 8 , a water supply pressure sensor 9 , a three-phase electric metering chip 7 , a remote metering water meter 10 , a GPRS module 4 and a ZigBee module 6 .

The water supply pressure sensor 9 is installed on the main water supply pipeline to provide a pressure feedback signal for the water pump frequency conversion controller 8. The single chip microcomputer 5 uses the UART serial port to set the target pressure parameter of the water pump frequency conversion controller 8 and sends start and stop work control commands. The water pump frequency conversion controller 8 Adjust the speed of the water pump motor to turn the water source in the well or pond into the constant pressure water supply of the main pipeline, wherein the working pressure parameter of the main pipeline is set as the target pressure value of the water pump frequency conversion controller 8; the current output type water supply pressure sensor 9 is optional The model is GB-3000FS, and the pressure test range is 0-1.6MPa, which can meet the pipeline pressure test requirements; the selection of the pump frequency conversion controller 8 is first determined according to the pipeline pump "flow-lift-caliber-power" selection comparison table Motor power, and then determine the model of the water pump frequency conversion controller 8, for example: the water head is 15 meters, the irrigation water flow rate is 30m ³ /h, the main pipe with a diameter of 65mm can be selected, and the three-phase motor power of the pump is 2.2kW, the model The VFG022M43D frequency converter can be used as the water pump frequency conversion controller 8 .

The remote metering water meter 10 is used to measure the water consumption of irrigation operations. It is installed on the main water supply pipe. The selection basis is mainly the diameter and flow rate of the main pipe. Secondary irrigation water consumption or cumulative water consumption. The single-chip microcomputer 5 obtains the cumulative value of water consumption through the UART interface, and the remote transmission direct-reading metering water meter series has a UART interface, which is suitable for water consumption measurement of various flow specifications and pipe diameters.

The three-phase electricity metering chip 7 is used to measure the electricity consumption of the monitoring station 2. The RN8302B chip can be used to realize the electricity consumption measurement at low cost. The single-chip microcomputer 5 obtains the electricity consumption measurement data from the RN8302B chip through the SPI serial port.

Single-chip microcomputer 5 utilizes GPRS module 4 model M35 with low price and stable performance to complete the data communication between monitoring station 2 and remote monitoring platform 1: receive irrigation control parameters and instructions from remote monitoring platform 1 or upload soil to remote monitoring platform 1 Injury information, equipment status information, etc.

The single-chip microcomputer 5 uses the ZigBee module 6 of the CC2530 chip and the ZigBee module 12 of the CC2530 chip in the monitoring terminal 3 to form a network to complete the transmission of irrigation control parameters, request information, and land moisture information.

The monitoring terminal 3 controls the water supply on and off of the water branch by using the soil temperature and humidity data collected at the typical sampling points in the irrigation-related areas of the water branch, including a soil temperature and humidity sensor 11, a ZigBee module 12, and a solenoid valve drive circuit. 13. Solenoid valve 14, solar panel 14, rechargeable battery 17 and battery charging management circuit 16.

The CC2530 chip selected by the ZigBee module 12 is an enhanced 8051CPU single-chip microcomputer with multiple functions of 2.4GHzIEEE802. The terminal controls the output of the solenoid valve drive circuit 13 in a level mode; the solenoid valve drive circuit 13 selects the chip MAX629, and converts the energy storage of the rechargeable battery 17 into the working power of the solenoid valve 14 in a boost mode; The solenoid valve 14 has a rated voltage of DC24V and a holding current of 190mA, which can meet the control requirements of the irrigation water branch on and off.

The monitoring terminal 3 is powered by a polysilicon material solar panel 14 with stable operation and low cost, and passes through a battery charging management circuit 16 with a solar battery maximum power point tracking function. The charging management circuit 16 selects a chip CN3791 charging management integrated circuit to provide lithium polymer The rechargeable battery 17 charges, and the rechargeable battery 17 supplies power to the soil temperature and humidity sensor 11, the ZigBee module 12 and the solenoid valve driving circuit 13 again. The solenoid valve 14 is the main power consumption component of the monitoring terminal 3 and determines the selection of the solar panel 14 and the rechargeable battery 17 . Use the super-conventional irrigation mode that irrigates once a day for model selection: select a solar battery pack with a rated output voltage of 5V and a rated current of 840mA under standard light conditions, and provide a lithium polymer battery pack with a rated voltage of 3.7V and a capacity of 2Ah A maximum of 16800mAVh of energy can be obtained after charging for 4 hours, and the monitoring terminal 3 selected from the above components can meet the power consumption requirement of irrigation for at least two hours a day.

Example 2:

This embodiment provides a method for using a three-level control system for automatic water-saving irrigation of multiple fields in a large area. To realize the automatic water-saving irrigation control of different types of crops in different growth stages in multiple fields in a large area, the steps are as follows:

(1) The monitoring software on the remote monitoring platform 1, according to the experience of experts, prepares the irrigation water consumption plan control table for crops in different growth stages in different fields for the soil properties, components and crop types on different fields. The essence of this control table is The corresponding table of the upper limit and lower limit threshold parameters that need to be controlled in different time periods for the humidity and temperature of soil in different fields.

When the irrigation control system is in operation, the monitoring program of the remote monitoring platform 1 automatically sends the upper and lower threshold parameters of the soil temperature and soil moisture that need to be modified to the corresponding monitoring station 2 that needs to be adjusted through network communication according to the system time change.

(2) The monitoring station 2 keeps in touch with the remote monitoring platform 1 all the time. The monitoring station 2 saves the relevant parameters after receiving the newly modified soil temperature upper limit threshold and soil moisture upper and lower limit thresholds sent by the remote monitoring platform 1 according to the time point change, and uses its own ZigBee module 6 to send the new modification of irrigation control to the relevant monitoring terminal 3 Threshold parameter.

(3) The monitoring terminal 3 stores the soil temperature upper limit threshold and soil moisture upper and lower limit threshold parameters received from the monitoring terminal 3 in the ZigBee memory. The monitoring terminal 3 utilizes temperature and humidity sensors installed on typical sampling points to periodically collect soil temperature and humidity information, and compares them with the stored soil moisture upper and lower thresholds and soil temperature upper thresholds; when the soil detection temperature exceeds the upper threshold or When the humidity is lower than the lower limit threshold, the irrigation request information is sent to the monitoring station 2; the monitoring station 2 decides whether to start irrigation water supply according to the number of request information sent by the monitoring terminal 3; The irrigation command is sent to the water pump frequency conversion controller 8 to start the work command, and the water pump frequency conversion controller 8 drives the water pump motor to deliver the irrigation water with the set pressure to the water supply main pipeline. At this time, the irrigation start command is received and the soil humidity does not reach the upper limit threshold. The terminals 3 all open the water branch electromagnetic valve 14 for irrigation operation; when the monitoring terminal 3 detects that the soil humidity reaches the upper threshold, then close the water water branch electromagnetic valve 14 and send the irrigation end information to the monitoring station 2, and the monitoring station 2 receives the If it is necessary to end the irrigation process, the monitoring station 2 will send an end work command to the water pump frequency conversion controller 8 to stop the irrigation water supply, and at the same time send the water consumption and electricity consumption of this irrigation to the remote monitoring platform 1 Quantitative data.

Example 3:

This embodiment provides an implementation method for illustrating a three-level control system for automatic water-saving irrigation of large-area fields.

A relatively common situation is that there is only one source of irrigation water for a large-scale field or multiple fields (such as a motorized well or a pond), and there are particularly many branches that require irrigation water, so many monitoring terminals 3 are used. In view of this situation, using one monitoring station 2 to control the total number of monitoring terminals 3 for irrigation operations at the same time and implement sequential rotation irrigation can solve the irrigation control problem of large-scale or multi-field plots with relatively low-cost water supply equipment.

Calculate the water consumption per unit time of the irrigation operation based on the irrigation area and the minimum round irrigation interval time, so as to determine the power of the water pump motor and then select the water pump frequency conversion controller 8 to perform irrigation operations. A large number of monitoring terminals 3 make irrigation requests, but , the monitoring station 2 is numbered according to the monitoring terminal 3, and only a certain number of adjacent monitoring terminals 3 are allowed to perform irrigation operations. During the irrigation operation, the monitoring terminals 3 that meet the irrigation humidity requirements are withdrawn from the irrigation operation, while the monitoring station 2 is open to request The monitoring terminal 3 near the irrigation starts the irrigation operation, ensuring that the total number of monitoring terminals 3 for irrigation operation is basically unchanged; through the continuous water supply of the monitoring station 2 and the rotation of the irrigation operation of the monitoring terminal 3, automatic water-saving irrigation control of large-area fields can be realized.

Example 4:

This embodiment provides a method for using the three-level control system for automatic water-saving irrigation when the weather forecast intervenes in the irrigation control.

If the irrigation operation is carried out near the rainfall, especially the heavy rainfall, it will not only waste the source of water but also cause crop flooding. Therefore, manual intervention is especially required. The method is as follows:

(1) The remote monitoring platform 1 is equipped with a network client access function. Authorized management personnel can log in to the remote monitoring platform 1 on any computer that can access the Internet to check the soil moisture, equipment status, or perform manual irrigation operations according to the weather forecast. intervene.

When the rainfall weather forecast, especially the heavy rainfall weather forecast occurs, the management personnel send soil moisture query instructions to the monitoring station 2, and the monitoring station 2 sends the collected injury information about the field to the remote monitoring platform 1, and the management personnel use the electronic map Check the color distribution of the monitoring terminal 3 icon and combine the growth stages of the crops to make a decision on whether to manually intervene in the irrigation process; if it is determined that some monitoring stations 2 need to prohibit irrigation operations within a certain period of time, then send a certain period of time to these monitoring stations 2 If it is necessary to reduce irrigation water consumption, modify the upper and lower limit control thresholds of soil moisture in some fields within a certain period of time when it is about to rain.

(2) After the monitoring station 2 receives the manual modification to reduce the control parameters of irrigation water consumption, it immediately forwards it to the monitoring terminal 3 for control, and the monitoring terminal 3 controls the irrigation process according to the new parameters; if the monitoring station 2 receives the The monitoring station 2 shuts off the irrigation water supply within the corresponding period of time when the irrigation prohibition instruction is sent, and ignores the irrigation request instruction sent by the relevant monitoring terminal 3 .

Claims (10)

1. large region many fields automatic water-saving irrigation three-stage control system, is characterized in that, comprises remote monitoring platform, extremelyA few monitoring station and several monitor terminals; Between remote monitoring platform and monitoring station, carry out data communication in GPRS mode,Between monitoring station and monitor terminal, carry out data communication with ZigBee-network;

Described remote monitoring platform comprises server;

Described monitoring station comprises single-chip microcomputer, pump variable frequency controller, pressure of supply water sensor, GPRS module and ZigBeeModule; Single-chip microcomputer is connected with pump variable frequency controller, GPRS module and ZigBee module respectively by serial line interface, supplies waterPressure sensor is electrically connected with pump variable frequency controller;

Described monitor terminal comprises ZigBee module, soil temperature-moisture sensor, driving circuit for electromagnetic valve, magnetic valve; ZigBeeModule is electrically connected with soil temperature-moisture sensor, driving circuit for electromagnetic valve respectively, and driving circuit for electromagnetic valve and magnetic valve are electrically connectedConnect.

2. large region as claimed in claim 1 many fields automatic water-saving irrigation three-stage control system, is characterized in that instituteState monitoring station and also comprise three-phase electricity computation chip and teletransmission metering water meter, three-phase electricity computation chip and teletransmission metering water meter are respectivelyBe electrically connected with single-chip microcomputer.

3. large region as claimed in claim 1 many fields automatic water-saving irrigation three-stage control system, is characterized in that instituteState monitor terminal and also comprise solar panel, rechargeable battery and battery charging management circuit, solar panel is by electricityPond charge management circuit is connected with rechargeable battery, rechargeable battery respectively with ZigBee module, soil temperature-moisture sensor and electricityElectromagnetic valve driving circuit electrical connection.

4. large region as claimed in claim 1 many fields automatic water-saving irrigation three-stage control system, is characterized in that instituteState driving circuit for electromagnetic valve and select booster type translation circuit.

5. large region as claimed in claim 1 many fields automatic water-saving irrigation three-stage control system, is characterized in that instituteState soil temperature-moisture sensor and select STH11 type temperature, humidity integrated transducer.

6. large region as claimed in claim 3 many fields automatic water-saving irrigation three-stage control system, is characterized in that instituteState battery charging management circuit and select the Charge Management integrated circuit with solar cell MPPT maximum power point tracking function.

7. large region as claimed in claim 6 many fields automatic water-saving irrigation three-stage control system, is characterized in that instituteState battery charging management circuit and select CN3791 Charge Management integrated circuit.

8. making of the large region many fields automatic water-saving irrigation three-stage control system as described in claim 1-7 any oneBy method, comprise the following steps,

(1) temperature, the humidity data in the soil temperature-moisture sensor Real-time Collection field of sampled point, and by temperature, humidity numberReportedly be defeated by the ZigBee module of monitor terminal;

(2) the ZigBee module of monitor terminal receives after temperature, humidity data and is stored in monitor terminal ZigBee moduleIn soil moisture upper and lower limit threshold value and the comparison of soil moisture upper limit threshold, when exceed soil moisture upper limit threshold or lower thanWhen soil moisture lower threshold, monitor terminal is sent and irrigates solicited message to monitoring station by ZigBee module;

(3) whether the solicited message decision-making that monitoring station sends according to monitor terminal starts irrigation water supply, need to enter if be judged to beWhen row is irrigated, monitoring station sends and irrigates order and send and start work order, water to pump variable frequency controller to monitor terminalPump frequency conversion controller drives pump motor to carry the irrigation water of setting pressure to vibration means for main pipe for supplying water road, receives to irrigate to start to refer toThe monitor terminal that order and soil moisture do not reach soil moisture upper limit threshold is all opened water and is propped up way solenoid valve and irrigate behaviourDo;

(4), in the time that monitor terminal detects that soil moisture reaches soil moisture upper limit threshold, monitor terminal is closed water and is propped upWay solenoid valve also sends and irrigates ending message to monitoring station, and monitoring station judges whether to need according to the irrigation ending message receivingFinish irrigation process, if desired finish to irrigate process monitoring station and stop to pump variable frequency controller transmission power cut-off orderOnly irrigation water supply.

9. the using method of large region as claimed in claim 8 many fields automatic water-saving irrigation three-stage control system, its spyLevy and be, remote monitoring platform issues amended soil moisture upper and lower limit threshold value by GPRS network communication to monitoring stationAnd soil moisture upper limit threshold, monitoring station receives amended soil moisture upper and lower limit threshold value and soil moisture upper limit thresholdAfter value, be stored in ZigBee module, monitoring station utilizes the ZigBee module of self to send after amendment to monitor terminal simultaneouslySoil moisture upper and lower limit threshold value and soil moisture upper limit threshold and be stored in the ZigBee module of monitor terminal.

10. the using method of large region as claimed in claim 8 many fields automatic water-saving irrigation three-stage control system, itsBe characterised in that, remote monitoring platform is provided with networking client access function, has the administrative staff of authority can be at any energyOn the computer of online, login remote monitoring platform interface, certain time according to weather forecast situation manual amendment by rainfallSome field soil moisture upper and lower limit threshold value in section, or some field in certain time period by rainfall is arrangedIrrigate inhibit command, and send in requisition for the monitoring station of adjusting or irrigating forbidden control by GPRS network communication.