CN112462831B - Intelligent greenhouse control system - Google Patents
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- CN112462831B CN112462831B CN202011340960.4A CN202011340960A CN112462831B CN 112462831 B CN112462831 B CN 112462831B CN 202011340960 A CN202011340960 A CN 202011340960A CN 112462831 B CN112462831 B CN 112462831B
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Abstract
The invention discloses an intelligent greenhouse control system, which comprises a database, a remote wireless transmission system, a single greenhouse control system, a multi-span greenhouse control system, a water and fertilizer integrated water supply system and a power supply module, wherein the database is used for storing a plurality of remote wireless transmission systems; the collected environmental factor data are stored in a database of a remote server through a wireless data transmission module, meanwhile, mobile phone APP control software reads data information in the database of the remote server in real time through a GPRS module and sends a control command, a field monitoring computer analyzes the control command information after reading the control command, framing is carried out on the control command, and the control command is sent to a single-unit shed control system, a multi-span shed control system and a water and fertilizer integrated water supply system through a 485 bus communication network. The PLC controller is adopted as a core device of the control system, so that the system has the advantages of high reliability, stable performance, simple structure, strong reliability, strong transportability and convenient function change, and can meet the requirements of different users.
Description
Technical Field
The invention belongs to the field of greenhouse control, and particularly relates to an intelligent greenhouse control system.
Background
The greenhouse is an important component of facility agriculture, intelligent regulation and control of environmental parameters in the greenhouse is a key of greenhouse technology, and the improvement of intelligent control and management level of the greenhouse can give full play to the high efficiency of the facility agriculture. With the continuous improvement of the agricultural informatization level, the intelligent greenhouse measurement and control system in China has great development in technology and scale, but compared with the developed countries, the intelligent greenhouse control in China has great differences in production stability, the perfection degree of supporting facilities, the modernization level and the industrialization degree.
With the rapid development of Chinese economy, the quality of life of people is greatly improved. With the progress of science and technology and the acceleration of the industrialization of agriculture, the greenhouse cultivation technology is used as an important product of modern agriculture under the drive of social demands and the modernization of agriculture, and the quantity of the greenhouse cultivation technology is increased. The research of the intelligent measurement and control system of the greenhouse of the Internet of things is beneficial to improving the accuracy of information acquisition and the high-efficiency reliability of transmission in modern agriculture, so that the control is more rapid and effective, and the system is more stable. At present, in the existing domestic control system, a single chip microcomputer system is mostly adopted as a logic control unit for bottom layer control output, although the cost is low, the reliability is not high, and the environment in the greenhouse is interfered more, such as the influence of humidity, temperature and the like, so that the stability of the whole control system is poor. Secondly, the singlechip system has low universality and is difficult to adapt to different greenhouses. The foreign intelligent greenhouse control system has high reliability and high intelligence, but has very high cost and cannot be borne by general farmers at all. The design mainly solves the defects of low reliability, low universality and high cost of the existing control system.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an intelligent greenhouse control system.
An intelligent greenhouse control system comprises a database, a remote wireless transmission system, a single greenhouse control system, a multi-span greenhouse control system, a water and fertilizer integrated water supply system and a power supply module.
The database and remote wireless transmission system comprises mobile phone APP control software, a remote server, an on-site monitoring computer and a wireless data transmission module;
environmental factor data collected by the single-shed control system, the multi-span shed control system and the water and fertilizer integrated water supply system are stored in a database of a remote server through a wireless data transmission module, and meanwhile, mobile phone APP control softwareThrough GPRS module Reading data information in a remote server database in real time and sending a control instructionThe control instruction sent by the mobile phone APP control software is written into the database, the field monitoring computer analyzes the control instruction information after reading the control instruction, the control instruction is framed, and the control instruction is sent to the single-shed control system, the multi-span shed control system and the water and fertilizer integrated water supply system through the 485 bus communication network.
The single shed control system comprises a single shed control cabinet, an environmental factor acquisition system, a film rolling motor, a single shed electronic water valve and a single shed pressure transmitter.
The multi-span shed control system comprises a multi-span shed control cabinet, an indoor environment factor acquisition system, an internal and external shading motor, an internal and external circulating fan, a wet curtain, a multi-span shed electronic water valve and a multi-span shed pressure transmitter.
The water and fertilizer integrated water supply system comprises a water supply control cabinet, an outdoor environmental factor acquisition system, a water and fertilizer proportioning valve, a water supply system electronic water valve and a water supply system pressure transmitter.
The power module adopts a 24V switching power supply, and the database, the remote wireless transmission system, the single shed control system, the multi-span shed control system and the water and fertilizer integrated water supply system are correspondingly and independently powered by the power module.
The database and remote wireless transmission system comprises mobile phone APP control software, a remote server, an on-site monitoring computer and a wireless data transmission module.
An on-site monitoring computer: the intelligent control system is used for collecting data of environmental factors in the greenhouse, reading the running state of field equipment, and sending a control command to control the equipment according to the requirement of plant growth so as to achieve the effect that the environmental factors in the greenhouse are in the optimal state. The serial interface of the on-site monitoring computer is connected with the wireless data transmission module, and the on-site monitoring computer, the single shed control cabinet, the multi-span shed control cabinet and the water supply control cabinet carry out data transmission through the wireless data transmission module.
The remote server: the data sent by the on-site monitoring computer are stored, and meanwhile, the GPRS module is used for receiving the query instruction and the control instruction sent by the APP software of the mobile phone terminal. The remote server stores the control instruction in a corresponding control instruction data table, and the field monitoring computer reads the control instruction data table at regular time to acquire control instruction information sent by the mobile phone terminal. And the environment factor data and the equipment state data sent by the field monitoring computer are respectively stored in the corresponding environment factor data table and the corresponding equipment state data table.
Further, the remote server adopts SQL Server 2008R2A database.
The mobile phone APP control software comprises: the intelligent display system is used for displaying data of environmental factors in the greenhouse, displaying running states of various devices and controlling field devices. And the mobile phone APP control software sends out an instruction for reading the database, and reads related data information stored in the environmental factor data table and the equipment state data table in the remote server through the GPRS module. When the field device needs to be controlled, a corresponding control instruction is sent to the remote server through the mobile phone APP software.
Single shed control system
The single shed control system comprises a single shed control cabinet, a single shed environment factor acquisition system, a single shed film rolling motor, a single shed electronic water valve and a single shed pressure transmitter.
Monomer canopy switch board include text display, PLC host computer, DVP extension module, contactor, controller communication port, solid state relay and 485 analog acquisition module: the PLC host is connected with a text display, a DVP expansion module, a solid-state relay and a 485 analog quantity acquisition module, the DVP expansion module is connected with a contactor, the contactor is connected with a monomer shed film rolling motor, the solid-state relay is connected with a monomer shed electronic water valve, and the 485 analog quantity acquisition module is connected with a monomer shed pressure transmitter; the controller communication port adopts a 485 bus communication network;
monomer canopy switch board control monomer canopy environmental factor collection system carries out data acquisition to monomer canopy internal environment factor, carries out the analysis to the environmental factor information of gathering simultaneously, sends control command control to roll up opening and closing of membrane motor and is used for adjusting the interior humiture of canopy. The single-shed control cabinet collects water pressure of a water inlet in the shed through the single-shed pressure transmitter, transmits a pressure value collected by the single-shed pressure transmitter to the PLC host through the 485 analog quantity collection module, sends the collected water pressure of the water inlet in the shed to the on-site monitoring computer through the wireless data transmission module, and the on-site monitoring computer supplies water at constant pressure according to the water pressure value. The PLC host drives the contactor through the DVP extension module, drives the monomer shed film rolling motor through the contactor, and controls the monomer shed electronic water valve through the solid-state relay. A motor current sampling module is arranged in a PLC host of the single shed control cabinet; when the film rolling motor of the single shed works, the current value of the film rolling motor is monitored in real time through the motor current sampling module, and if the current value exceeds a set threshold value, the film rolling motor of the single shed is controlled to be automatically powered off so as to protect the switching power supply.
Monomer canopy environmental factor collection system connects the controller communication mouth of monomer canopy switch board, and environmental factor collection system includes air temperature and humidity sensor, soil pH value sensor, soil EC value sensor, CO2 concentration sensor and illuminance sensor: as shown in fig. 5, the environmental factors in the greenhouse include air temperature and humidity, soil PH, soil EC, CO2 concentration, and light intensity. Carry out environmental factor data acquisition through corresponding environmental factor sensor among the environmental factor collection system, read through the controller communication mouth of monomer canopy switch board, the controller communication mouth adopts 485 bus communication network, addresses every environmental factor sensor respectively, then the PLC host computer of monomer canopy switch board reads every environmental factor in turn.
Film rolling motor of monomer canopy: the film rolling motor is used for controlling the opening and closing of the top film and the side film of the single shed, adopts direct-current 24V low-voltage electricity, and is provided with a portable film rolling power supply; when the single-shed control cabinet goes wrong or is in a power failure state and cannot be used, the cable of the single-shed film rolling motor is connected into the portable film rolling power supply quick connector, so that the normal work of the single-shed film rolling motor is guaranteed.
Monomer canopy electron water valve and monomer canopy pressure transmitter: the electronic water valves of the single sheds are arranged on the water inlet main pipe of each single shed, and the voltage of the water valves is 24V direct current. The installation of monomer canopy electron water valve connects in parallel a manual ball valve simultaneously for when preventing that can't open after the trouble appears in monomer canopy electron water valve, through the switch of manual ball valve control waterway. And a single shed pressure transmitter is arranged on the shed entering water main of each single shed and used for measuring the water pressure of a shed entering pipeline. The PLC host controls the solid-state relay by outputting PWM (pulse width modulation) square waves, and the solid-state relay outputs modulated voltage to drive the electronic water valve of the single shed.
The constant-pressure water supply system has the following control principle:
the constant-pressure water supply system is started firstly, and then the PLC host of the single shed control cabinet outputs 100% duty ratio, so that the single shed electronic water valve works at full voltage, and the single shed electronic water valve is conveniently and completely opened. And then, performing time delay operation according to the time delay time set by the distance between the electronic water valve of the single shed and the constant-pressure water supply system, acquiring a water pressure value by the PLC host after the time delay is finished, and when the water pressure does not reach the set pressure P1, indicating that a pipeline fault or the electronic water valve of the single shed has a fault, and alarming by the control cabinet of the single shed to inform a maintainer to check. When the water pressure reaches the set pressure P1, the PLC host gradually reduces the duty ratio to the low-limit duty ratio a1, the water pressure is read in a delayed mode again, when the water pressure reaches the set low-limit pressure P2, the pipeline and the electronic water valve work normally, and the electronic water valve operates constantly according to the current duty ratio a 1. When the water pressure does not reach the set low pressure limiting force P2, the PLC host outputs the square wave with the duty ratio of 100% again, the set delay time carries out delay operation, then the PLC host reduces the duty ratio to the second low duty ratio a2 again, the water pressure is read in a delayed mode, and when the water pressure reaches the set low pressure limiting force P2, the PLC host continues to operate according to the current duty ratio. The duty ratio a2 is larger than a1 so as to ensure that the electronic water valve of the single shed can maintain a normal open state. When the duty ratio is reduced to a2, the water pressure can not reach the set low pressure limiting force P2, which indicates that the electronic water valve of the pipeline or the single shed is faulty, the water supply is stopped, and the alarm is given. The lower limit duty ratio a1 and the second lower limit duty ratio a2 are preset values of the system.
The multi-span shed control system comprises a multi-span shed control cabinet, an indoor environment factor acquisition system, an internal and external shading motor, an internal and external circulating fan, a wet curtain light supplement system, a multi-span shed electronic water valve and a multi-span shed pressure transmitter.
The multi-span shed control cabinet is connected with an indoor environment factor acquisition system, an internal and external shading motor, an internal and external circulating fan, a wet curtain light supplement system, a multi-span shed electronic water valve and a multi-span shed pressure transmitter.
The multi-span shed control cabinet is the same as the single shed control cabinet in structure and is used for collecting data of environmental factors in the multi-span shed, analyzing the collected information of the environmental factors in the multi-span shed, sending a control instruction, controlling the opening and closing of the film rolling motor and adjusting the temperature and humidity in the multi-span shed. And simultaneously, an internal and external sun-shading fan, an internal and external circulating fan, a wet curtain and a light supplementing system in the multi-span shed are controlled. Because the multi-span shed control cabinet is generally placed in a shed, the water pressure of a water inlet in the shed needs to be collected, and the pressure at the water inlet is sent to a field monitoring computer. And then the on-site monitoring computer performs constant-pressure water supply according to the water pressure value.
Indoor environmental factor collection system includes air temperature and humidity sensor, soil pH value sensor, soil EC value sensor, CO2 concentration sensor and illuminance sensor: the environmental factors in the multi-span greenhouse comprise air temperature and humidity, soil pH value, soil EC value, CO2 concentration and illumination intensity. The data acquisition of corresponding environmental factors is carried out through corresponding environmental factor sensors, the data acquisition is carried out through a controller communication port in the multi-span shed control cabinet, the controller communication port adopts a 485 bus communication network, and the control mode is the same as the single shed control mode.
The inner and outer shading motors comprise an inner shading part and an outer shading part, can be opened and closed in a crossed mode to adjust illuminance information in a shed, are 380V three-phase asynchronous motors, are internally provided with front and rear limit switches, and need to be automatically cut off to stop the operation of the motors when the inner and outer shading parts are completely opened or closed. Every 4 internal and external shading motors are divided into a group as a control point. The number of the specific inner and outer shading motors is set according to practical application.
Internal and external circulating fans: the circulating fan is divided into an inner circulating part and an outer circulating part, and 380V three-phase alternating current asynchronous motors are adopted. The internal circulation fan and the external circulation fan are divided into a group by 4 and used as a control point. The sunshade can alternately open and close the circulating fan, and the multistage adjustment of the circulating fan is realized. The number of the internal and external circulating fans is set according to practical application.
Wet curtain light filling system include wet curtain and light filling system: the wet curtains are controlled by the water pumps in groups, 2 wet curtains share one water pump and serve as a control point, and the number of the specific wet curtains is set according to practical application. The light supplement system comprises 4 rows of light supplement lamps, wherein 1 row and 3 rows are a control point; 2. 4 rows are used as a control point, and the illuminance is divided into three modes of strong, medium and weak by alternately starting the light supplement lamps.
The multi-span greenhouse electronic water valve and the multi-span greenhouse pressure transmitter: the working modes of the multi-span shed electronic water valve and the multi-span shed pressure transmitter are the same as those of the single shed. An electronic water valve of the multi-span greenhouse and a pressure transmitter of the multi-span greenhouse are arranged on a main water pipe of the multi-span greenhouse, and the voltage of the water valve is 24V direct current. And the main water pipes entering the multi-span greenhouse are shunted according to the actual planting scale, and each branch water pipe is also provided with a multi-span greenhouse electronic water valve and a multi-span greenhouse pressure transmitter. The multi-span shed electronic water valve is installed and connected with a manual ball valve in parallel, so that the phenomenon that the multi-span shed electronic water valve cannot be opened after a fault occurs is prevented, and the water way is controlled to be opened and closed through the manual ball valve.
The water and fertilizer integrated water supply system comprises a water supply control cabinet, an outdoor environmental factor acquisition system, a water and fertilizer proportioning valve, a water supply system electronic water valve and a water supply system pressure transmitter.
The water supply control cabinet is connected with an outdoor environmental factor acquisition system, a water and fertilizer proportioning valve, a water supply system electronic water valve and a water supply system pressure transmitter.
The structure of water supply control cabinet is the same with monomer canopy switch board structure: the system is used for monitoring the water pressure of a pump house water outlet main pipe and water supply points of all the sheds and periodically irrigating all the shed areas in a rotation mode according to a set program; and collecting the outdoor environment factors through an outdoor environment factor collecting system. The serial port of the PLC host in the water supply control cabinet is connected to a 485 bus communication network, the 485 bus communication network is connected with each sensor of the outdoor environmental factor acquisition system, and the PLC host acquires data of each sensor one by one in a round training mode.
The outdoor environment factor acquisition system comprises an air temperature and humidity sensor, a illuminance sensor, a wind power sensor and a wind direction sensor and is used for acquiring 4 outdoor environment factors of air temperature, humidity, illuminance, wind power and wind direction.
The water-fertilizer proportioning valve is arranged at a water outlet main pipe of the pump room and is used for preparing the concentration of water and liquid medicine, and the liquid medicine with different proportions is automatically prepared according to the preset program in the water supply control cabinet and the proportioning requirements of different types of liquid fertilizers so as to achieve the optimal state of plant growth.
And the water supply system electronic water valve and the water supply system pressure transmitter are arranged on the pump room water outlet main pipe and the pump room water outlet main pipe to each multi-span shed and single shed water supply point, and are used for acquiring the pressure state of each water supply point and detecting the state of the pump room water outlet main pipe. When the difference value between the pressure of the water outlet main pipe of the pump room and the pressure of the water supply point exceeds a set threshold value, the fact that the filter of the pump room needs to be cleaned is indicated. If the filter is cleaned and the pressure of the water supply point is still low, which indicates that the water channel of the water outlet main pipe of the pump room is blocked, the filters and valves of the branch pipes are checked one by one along the direction of the main pipe, and the blocked point is found out for cleaning. The voltage of the electronic water valve of the water supply system is 24V direct current.
The invention has the following beneficial effects:
the invention has the advantages that the PLC is adopted as the core device of the control system, the reliability is high, and the performance is stable. For the collection of the environmental factors, a 485 bus communication network is adopted, so that the control system can be quickly integrated, and the system is convenient and reliable. For the field control layer, an industrial wireless data transmission module is adopted, so that reliable data transmission can be realized, the data transmission cost is low, and the programming is simple and flexible after a data communication protocol is customized. The whole control system has the advantages of simple structure, strong reliability, strong transportability and convenient function change, and can better meet the requirements of different users.
Drawings
FIG. 1 is a general block diagram of the system of the present invention;
FIG. 2 is a diagram of a database and remote wireless transmission system;
FIG. 3 is a functional block diagram of a single canopy control system;
FIG. 4 is a schematic diagram of a single canopy control cabinet structure;
FIG. 5 is a schematic diagram of an indoor environment factor;
FIG. 6 is a diagram of a power supply system for the film winding motor;
FIG. 7 is a schematic diagram of an electronic water valve and a pressure transmitter;
FIG. 8 is a schematic diagram of an electronic water valve;
FIG. 9 is a flow chart of the control of the electronic water valve;
FIG. 10 is a schematic structural view of a multi-span shed control system;
fig. 11 is a schematic structural diagram of a water pump room control system.
Detailed Description
The system of the invention is further described with reference to the following figures and examples.
An intelligent greenhouse control system comprises a database, a remote wireless transmission system, a single greenhouse control system, a multi-span greenhouse control system, a water and fertilizer integrated water supply system and a power supply module, wherein the overall structure of the system is shown in figure 1.
The database and remote wireless transmission system comprises mobile phone APP control software, a remote server, an on-site monitoring computer and a wireless data transmission module;
environmental factor data collected by the single-canopy control system, the multi-span canopy control system and the water and fertilizer integrated water supply system are stored in a database of a remote server through a wireless data transmission module, and meanwhile, mobile phone APP control softwareThrough GPRS module Reading data information in a remote server database in real time and sending a control instructionThe control instruction that cell-phone APP control software sent will write in the database, and after the on-the-spot monitoring computer read control instruction, analytic control instruction information carries out the framing with control instruction again, sends for monomer canopy control system, a canopy control system and liquid manure integration water supply system through 485 bus communication network.
The single shed control system comprises a single shed control cabinet, an environmental factor acquisition system, a film rolling motor, a single shed electronic water valve and a single shed pressure transmitter.
The multi-span shed control system comprises a multi-span shed control cabinet, an indoor environment factor acquisition system, an internal and external shading motor, an internal and external circulating fan, a wet curtain, a multi-span shed electronic water valve and a multi-span shed pressure transmitter.
The water and fertilizer integrated water supply system comprises a water supply control cabinet, an outdoor environmental factor acquisition system, a water and fertilizer proportioning valve, a water supply system electronic water valve and a water supply system pressure transmitter.
The power module adopts a 24V switching power supply, and the database, the remote wireless transmission system, the single shed control system, the multi-span shed control system and the water and fertilizer integrated water supply system are correspondingly and independently powered by the power module.
Database and remote wireless transmission system:
as shown in fig. 2, the database and remote wireless transmission system includes a mobile phone APP control software, a remote server, an on-site monitoring computer, and a wireless data transmission module.
An on-site monitoring computer: the intelligent control system is used for collecting data of environmental factors in the greenhouse, reading the running state of field equipment, and sending a control command to control the equipment according to the requirement of plant growth so as to achieve the effect that the environmental factors in the greenhouse are in the optimal state. The serial interface of the on-site monitoring computer is connected with the wireless data transmission module, and the on-site monitoring computer, the single shed control cabinet, the multi-span shed control cabinet and the water supply control cabinet carry out data transmission through the wireless data transmission module.
The remote server: the data sent by the on-site monitoring computer are stored, and meanwhile, the GPRS module is used for receiving the query instruction and the control instruction sent by the APP software of the mobile phone terminal. The remote server stores the control instruction in a corresponding control instruction data table, and the field monitoring computer reads the control instruction data table at regular time to acquire control instruction information sent by the mobile phone terminal. And the environment factor data and the equipment state data sent by the field monitoring computer are respectively stored in the corresponding environment factor data table and the corresponding equipment state data table.
Further, the remote server adopts SQL Server 2008R2A database having access to a large amount of data for analysis.
Mobile phone APP control software: the intelligent display system is used for displaying data of environmental factors in the greenhouse, displaying running states of various devices and controlling field devices. And the mobile phone APP control software sends out an instruction for reading the database, and reads related data information stored in the environmental factor data table and the equipment state data table in the remote server through the GPRS module. When the field device needs to be controlled, a corresponding control instruction is sent to the remote server through the mobile phone APP software,
single shed control system
The single shed control system comprises a single shed control cabinet, a single shed environment factor acquisition system, a single shed film rolling motor, a single shed electronic water valve and a single shed pressure transmitter, and is shown in figure 3.
As shown in fig. 4, the single-shelf control cabinet comprises a text display, a PLC host, a DVP extension module, a contactor, a controller communication port, a solid-state relay and a 485 analog acquisition module: the PLC host is connected with a text display, a DVP expansion module, a solid-state relay and a 485 analog quantity acquisition module, the DVP expansion module is connected with a contactor, the contactor is connected with a monomer shed film rolling motor, the solid-state relay is connected with a monomer shed electronic water valve, and the 485 analog quantity acquisition module is connected with a monomer shed pressure transmitter; the controller communication port adopts a 485 bus communication network;
monomer canopy switch board control monomer canopy environmental factor collection system carries out data acquisition to monomer canopy internal environment factor, carries out the analysis to the environmental factor information of gathering simultaneously, sends control command control to roll up opening and closing of membrane motor and is used for adjusting the interior humiture of canopy. The single-shed control cabinet collects water pressure of a water inlet in the shed through the single-shed pressure transmitter, transmits a pressure value collected by the single-shed pressure transmitter to the PLC host through the 485 analog quantity collection module, sends the collected water pressure of the water inlet in the shed to the on-site monitoring computer through the wireless data transmission module, and the on-site monitoring computer supplies water at constant pressure according to the water pressure value. The 24V switching power supply supplies power to the whole system. The PLC host drives the contactor through the DVP extension module, drives the monomer shed film rolling motor through the contactor, and controls the monomer shed electronic water valve through the solid-state relay, so that the working reliability of the system is ensured. A motor current sampling module is arranged in a PLC host of the single shed control cabinet; when the film rolling motor of the single shed works, the current value of the film rolling motor is monitored in real time through the motor current sampling module, and if the current value exceeds a set threshold value, the film rolling motor of the single shed is controlled to be automatically powered off so as to protect the switching power supply.
Monomer canopy environmental factor collection system connects the controller communication mouth of monomer canopy switch board, and environmental factor collection system includes air temperature and humidity sensor, soil pH value sensor, soil EC value sensor, CO2 concentration sensor and illuminance sensor: as shown in fig. 5, the environmental factors in the greenhouse include air temperature and humidity, soil PH, soil EC, CO2 concentration, and light intensity. Carry out environmental factor data acquisition through corresponding environmental factor sensor among the environmental factor collection system, read through the controller communication mouth of monomer canopy switch board, the controller communication mouth adopts 485 bus communication network, addresses every environmental factor sensor respectively, then the PLC host computer of monomer canopy switch board reads every environmental factor in turn. This ensures the reliability of data reading. Meanwhile, networking is facilitated, and maintenance is facilitated.
Film rolling motor of monomer canopy: the control system is used for controlling the opening and closing of the top film and the side film of the single shed, and adopts direct-current 24V low-voltage electricity to ensure the electricity utilization safety.
Furthermore, in order to ensure the use reliability, the film rolling motor of the single shed is provided with a portable film rolling power supply; when the single-shed control cabinet goes wrong or is in a power failure state and cannot be used, the cable of the single-shed film rolling motor is connected into the portable film rolling power supply quick connector, so that the normal work of the single-shed film rolling motor is guaranteed.
FIG. 6 is a diagram of a power supply system for the film winding motor;
because the mass of the 24V storage battery is heavy, one portable film winding power supply can only supply one motor, and each user can be provided with more portable film winding power supplies. Sometimes, when the film rolling rod is blocked, or snow is accumulated in winter, the film rolling motor cannot rotate, and if no protective measures are taken, the switch power supply can be burnt. Therefore, be provided with motor current sampling module in the PLC host computer of monomer canopy switch board. When the film rolling motor of the single shed works, the current value of the film rolling motor is monitored in real time through the motor current sampling module, and if the current exceeds a set threshold value, the film rolling motor is controlled to be automatically powered off so as to protect the switching power supply.
Monomer canopy electron water valve and monomer canopy pressure transmitter: the electronic water valves of the single sheds are installed on the water inlet main pipes of each single shed, the voltage of the water valves is 24V direct current, and the electricity safety is guaranteed. The installation of monomer canopy electron water valve connects in parallel a manual ball valve simultaneously for when preventing that can't open after the trouble appears in monomer canopy electron water valve, through the switch of manual ball valve control waterway. The single shed pressure transmitter is arranged on the shed entering water main pipe of each single shed and used for measuring the water pressure of a shed entering pipeline, and the field monitoring computer takes the water pressure of the shed entering pipeline as the basis of the constant-pressure water supply system.
The electronic water valve of the single shed is generally arranged near the control cabinet of the single shed, so that wiring is convenient, and voltage drop can be reduced in a short distance due to the fact that low-voltage direct current is 24V. Compare in traditional constant pressure water supply, the water pressure that adopts into canopy water main to go out is controlled more accurately, guarantees the reliability of supplying water. The PLC host controls the solid-state relay by outputting PWM (pulse width modulation) square waves, and the solid-state relay outputs modulated voltage to drive the single-shed electronic water valve.
In addition, because the traditional power supply mode of the electronic water valve is to supply power to the water valve all the time, the valve body can generate heat and even be scalded after the water valve works for a long time. But also very power consuming. Although an energy-saving module of an electronic water valve is available in the market at present, the generality is not strong, and the energy-saving module cannot be used in large quantities. The design adopts an automatic depressurization method to well solve the problem. As shown in fig. 8, a solid-state relay is adopted in hardware, the DVP-ES2 PLC host outputs a PWM pulse width modulation square wave to control the solid-state relay through a program, and the solid-state relay outputs a modulated voltage to drive the electronic water valve.
The constant-pressure water supply system is controlled according to the principle shown in fig. 9, the constant-pressure water supply system is started, and then the PLC host of the single shed control cabinet outputs 100% duty ratio, so that the single shed electronic water valve works at full voltage, and the single shed electronic water valve is conveniently and completely opened. And then, performing time delay operation according to the time delay time set by the distance between the electronic water valve of the single shed and the constant-pressure water supply system, acquiring a water pressure value by the PLC host after the time delay is finished, and when the water pressure does not reach the set pressure P1, indicating that a pipeline fault or the electronic water valve of the single shed has a fault, and alarming by the control cabinet of the single shed to inform a maintainer to check. When the water pressure reaches the set pressure P1, the PLC host gradually reduces the duty ratio to the low-limit duty ratio a1, the water pressure is read in a delayed mode again, when the water pressure reaches the set low-limit pressure P2, the pipeline and the electronic water valve work normally, and the electronic water valve operates constantly according to the current duty ratio a 1. Therefore, the heating value of the electronic water valve can be greatly reduced, and the power consumption can be reduced. When the water pressure does not reach the set low pressure limiting force P2, the PLC host outputs the square wave with the duty ratio of 100% again, the set delay time carries out delay operation, then the PLC host reduces the duty ratio to the second low duty ratio a2 again, the water pressure is read in a delayed mode, and when the water pressure reaches the set low pressure limiting force P2, the PLC host continues to operate according to the current duty ratio. The duty ratio a2 is larger than a1 so as to ensure that the electronic water valve of the single shed can maintain a normal open state. When the duty ratio is reduced to a2, the water pressure can not reach the set low pressure limiting force P2, which indicates that the electronic water valve of the pipeline or the single shed is faulty, the water supply is stopped, and the alarm is given. The lower limit duty ratio a1 and the second lower limit duty ratio a2 are preset values of the system.
Multi-span shed control system
As shown in fig. 10, the multi-span shed control system includes a multi-span shed control cabinet, an indoor environmental factor collection system, an internal and external shading motor, an internal and external circulating fan, a wet curtain light supplement system, a multi-span shed electronic water valve, and a multi-span shed pressure transmitter.
The multi-span shed control cabinet is connected with an indoor environment factor acquisition system, an internal and external shading motor, an internal and external circulating fan, a wet curtain light supplement system, a multi-span shed electronic water valve and a multi-span shed pressure transmitter.
The multi-span shed control cabinet is the same as the single shed control cabinet in structure and is used for collecting data of environmental factors in the multi-span shed, analyzing the collected information of the environmental factors in the multi-span shed, sending a control instruction, controlling the opening and closing of the film rolling motor and adjusting the temperature and humidity in the multi-span shed. And simultaneously, an internal and external sun-shading fan, an internal and external circulating fan, a wet curtain and a light supplementing system in the multi-span shed are controlled. Because the multi-span shed control cabinet is generally placed in a shed, the water pressure of a water inlet in the shed needs to be collected, and the pressure at the water inlet is sent to a field monitoring computer. And then the on-site monitoring computer performs constant-pressure water supply according to the water pressure value.
Indoor environmental factor collection system includes air temperature and humidity sensor, soil pH value sensor, soil EC value sensor, CO2 concentration sensor and illuminance sensor: the environmental factors in the multi-span greenhouse comprise air temperature and humidity, soil pH value, soil EC value, CO2 concentration and illumination intensity. The data acquisition of corresponding environmental factors is carried out through corresponding environmental factor sensors, the data acquisition is carried out through a controller communication port in the multi-span shed control cabinet, the controller communication port adopts a 485 bus communication network, and the control mode is the same as the single shed control mode.
The inner and outer shading motors comprise an inner shading part and an outer shading part, can be opened and closed in a crossed mode to adjust illuminance information in a shed, are 380V three-phase asynchronous motors, are internally provided with front and rear limit switches, and need to be automatically cut off to stop the operation of the motors when the inner and outer shading parts are completely opened or closed. Every 4 internal and external shading motors are divided into one group as a control point. The number of the specific inner and outer shading motors is set according to practical application.
Internal and external circulating fans: the circulating fan is divided into an inner circulating part and an outer circulating part, and 380V three-phase alternating current asynchronous motors are adopted. The internal circulation fan and the external circulation fan are divided into a group by 4 as a control point. The sunshade can alternately open and close the circulating fan, and the multistage adjustment of the circulating fan is realized. The number of the internal and external circulating fans is set according to practical application.
Wet curtain light filling system include wet curtain and light filling system: the wet curtains are controlled by the water pumps in groups, 2 wet curtains share one water pump and serve as a control point, and the number of the specific wet curtains is set according to practical application. The light supplement system comprises 4 rows of light supplement lamps, wherein 1 row and 3 rows are a control point; 2. 4 rows are used as a control point, and the illuminance is divided into three modes of strong, medium and weak by alternately starting the light supplement lamps. Is more suitable for the growth regulation of plants.
The multi-span greenhouse electronic water valve and the multi-span greenhouse pressure transmitter: the working modes of the multi-span greenhouse electronic water valve and the multi-span greenhouse pressure transmitter are the same as those of the single greenhouse. An electronic water valve of the multi-span greenhouse and a pressure transmitter of the multi-span greenhouse are arranged on a greenhouse entering water main of the multi-span greenhouse, the voltage of the water valve is 24V direct current, and the power utilization safety is ensured. And the main water pipes entering the multi-span greenhouse are shunted according to the actual planting scale, and each branch water pipe is also provided with a multi-span greenhouse electronic water valve and a multi-span greenhouse pressure transmitter, so that the accuracy of a pressure point is ensured. The multi-span shed electronic water valve is installed and connected with a manual ball valve in parallel, so that the phenomenon that the multi-span shed electronic water valve cannot be opened after a fault occurs is prevented, and the water way is controlled to be opened and closed through the manual ball valve. And a multi-span greenhouse pressure transmitter is simultaneously arranged on the greenhouse water main for measuring the water pressure of the greenhouse pipeline, and the field monitoring computer takes the water pressure of the greenhouse pipeline as the basis of constant-pressure water supply. Compare in traditional constant pressure water supply, adopt the water pressure of income canopy water main to go out to control more accurately, guarantee the reliability of supplying water.
As shown in fig. 11, the water and fertilizer integrated water supply system includes a water supply control cabinet, an outdoor environmental factor collecting system, a water and fertilizer proportioning valve, a water supply system electronic water valve, and a water supply system pressure transmitter.
The water supply control cabinet is connected with an outdoor environmental factor acquisition system, a water and fertilizer proportioning valve, a water supply system electronic water valve and a water supply system pressure transmitter.
The structure of water supply control cabinet is the same with monomer canopy switch board structure: the system is used for monitoring the water pressure of a pump house water outlet main pipe and water supply points of all the sheds and periodically irrigating all the shed areas in a rotation mode according to a set program; and collecting the outdoor environment factors through an outdoor environment factor collecting system. The serial port of the PLC host in the water supply control cabinet is connected to a 485 bus communication network, the 485 bus communication network is connected with each sensor of the outdoor environmental factor acquisition system, and the PLC host acquires data of each sensor one by one in a round training mode. Because the data change of each environmental factor is slow, the PLC adopts a round training mode to ensure the real-time performance of the data.
The outdoor environment factor acquisition system comprises an air temperature and humidity sensor, a illuminance sensor, a wind power sensor and a wind direction sensor and is used for acquiring 4 outdoor environment factors of air temperature, humidity, illuminance, wind power and wind direction. And data acquisition of the 4 outdoor environmental factors adopts a 485 bus communication network structure. Simple structure, data reading convenient operation.
The water-fertilizer proportioning valve is arranged at a water outlet main pipe of the pump room and is used for preparing the concentration of water and liquid medicine, and the liquid medicine with different proportions is automatically prepared according to the preset program in the water supply control cabinet and the proportioning requirements of different types of liquid fertilizers so as to achieve the optimal state of plant growth.
The water supply system electronic water valve and the water supply system pressure transmitter are arranged on the pump room water outlet main pipe and the water pump room water outlet main pipe to each multi-span shed and single shed water supply point, and are used for acquiring the pressure state of each water supply point and detecting the state of the pump room water outlet main pipe. Because the distances from the pump house water outlet main pipe to each multi-span shed and the single shed are different, the water supply control cabinet collects the pressure states of the water supply points during constant-pressure water supply. When the difference value between the pressure of the water outlet main pipe of the pump room and the pressure of the water supply point exceeds a set threshold value, the fact that the filter of the pump room needs to be cleaned is indicated. If the filter is cleaned and the pressure of the water supply point is still low, which indicates that the water way of the water outlet main pipe of the pump room is blocked, the filters and valves of the branch pipes are checked one by one along the direction of the main pipe, and the blocked point is found out for cleaning. The voltage of the electronic water valve of the water supply system is 24V direct current, and the power utilization safety is guaranteed.
FIG. 7 is a schematic diagram of an electronic water valve and a pressure transmitter; wherein, the device comprises 1-an analog water pressure meter, 2-an electronic water valve, 3-a pressure transmitter and 4-a manual ball valve.
Claims (1)
1. An intelligent greenhouse control system is characterized by comprising a database, a remote wireless transmission system, a single greenhouse control system, a multi-span greenhouse control system, a water and fertilizer integrated water supply system and a power supply module;
the database and remote wireless transmission system comprises mobile phone APP control software, a remote server, an on-site monitoring computer and a wireless data transmission module;
the environmental factor data collected by the single shed control system, the multi-span shed control system and the water and fertilizer integrated water supply system are stored in a database of a remote server through a wireless data transmission module, meanwhile, mobile phone APP control software reads data information in the database of the remote server in real time through a GPRS module and sends a control instruction, the control instruction sent by the mobile phone APP control software is written into the database, a field monitoring computer analyzes the control instruction information after reading the control instruction, frames the control instruction, and sends the control instruction to the single shed control system, the multi-span shed control system and the water and fertilizer integrated water supply system through a 485 bus communication network;
the single shed control system comprises a single shed control cabinet, an environmental factor acquisition system, a film rolling motor, a single shed electronic water valve and a single shed pressure transmitter;
the multi-span shed control system comprises a multi-span shed control cabinet, an indoor environment factor acquisition system, an internal and external shading motor, an internal and external circulating fan, a wet curtain, a multi-span shed electronic water valve and a multi-span shed pressure transmitter;
the water and fertilizer integrated water supply system comprises a water supply control cabinet, an outdoor environmental factor acquisition system, a water and fertilizer proportioning valve, a water supply system electronic water valve and a water supply system pressure transmitter;
the power module adopts a 24V switching power supply, and the database, the remote wireless transmission system, the single shed control system, the multi-span shed control system and the water and fertilizer integrated water supply system are correspondingly and independently powered by the power module;
the database and remote wireless transmission system comprises mobile phone APP control software, a remote server, an on-site monitoring computer and a wireless data transmission module;
an on-site monitoring computer: the system is used for collecting data of environmental factors in the greenhouse, reading the running state of field equipment, and simultaneously sending a control instruction to control the equipment according to the requirement of plant growth so as to enable the environmental factors in the greenhouse to be in the optimal state; the serial interface of the on-site monitoring computer is connected with the wireless data transmission module, and the on-site monitoring computer, the single shed control cabinet, the multi-span shed control cabinet and the water supply control cabinet carry out data transmission through the wireless data transmission module;
the remote server: storing data sent by a field monitoring computer, and receiving a query instruction and a control instruction sent by APP software of a mobile phone terminal through a GPRS module; the remote server stores the control instruction in a corresponding control instruction data table, and the field monitoring computer reads the control instruction data table at regular time to acquire control instruction information sent by the mobile phone terminal; the environment factor data and the equipment state data sent by the field monitoring computer are respectively stored in a corresponding environment factor data table and an equipment state data table;
the mobile phone APP control software comprises: the system is used for displaying the data of environmental factors in the greenhouse, displaying the running states of various devices and controlling field devices; the mobile phone APP control software sends out a database reading instruction, and reads related data information stored in an environment factor data table and an equipment state data table in a remote server through a GPRS module; when the field equipment needs to be controlled, a corresponding control instruction is sent to a remote server through the mobile phone APP software;
the remote server adopts an SQL Server 2008R2 database;
the single shed control system comprises a single shed control cabinet, a single shed environmental factor acquisition system, a single shed film rolling motor, a single shed electronic water valve and a single shed pressure transmitter;
monomer canopy switch board include text display, PLC host computer, DVP extension module, contactor, controller communication port, solid state relay and 485 analog acquisition module: the PLC host is connected with a text display, a DVP expansion module, a solid-state relay and a 485 analog quantity acquisition module, the DVP expansion module is connected with a contactor, the contactor is connected with a monomer shed film rolling motor, the solid-state relay is connected with a monomer shed electronic water valve, and the 485 analog quantity acquisition module is connected with a monomer shed pressure transmitter; the communication port of the controller adopts a 485 bus communication network;
the single shed control cabinet controls the single shed environmental factor acquisition system to acquire data of environmental factors in the single shed, analyzes the acquired environmental factor information, and sends a control instruction to control the opening and closing of the film rolling motor so as to adjust the temperature and humidity in the shed; the single-shed control cabinet acquires water pressure of a water inlet in a shed through the single-shed pressure transmitter, transmits a pressure value acquired by the single-shed pressure transmitter to the PLC host through the 485 analog quantity acquisition module, transmits the acquired water pressure of the water inlet in the shed to the field monitoring computer through the wireless data transmission module, and the field monitoring computer performs constant-pressure water supply according to the water pressure value; the PLC host drives the contactor through the DVP expansion module, drives the monomer shed film rolling motor through the contactor, and controls the monomer shed electronic water valve through the solid-state relay; a motor current sampling module is arranged in a PLC host of the single shed control cabinet; when the film rolling motor of the single shed works, the current value of the film rolling motor is monitored in real time through the motor current sampling module, and if the current value exceeds a set threshold value, the film rolling motor of the single shed is controlled to be automatically powered off so as to protect a switching power supply;
monomer canopy environmental factor collection system connects the controller communication mouth of monomer canopy switch board, and environmental factor collection system includes air temperature and humidity sensor, soil pH value sensor, soil EC value sensor, CO2 concentration sensor and illuminance sensor: the environmental factors in the greenhouse comprise air temperature and humidity, soil pH value, soil EC value, CO2 concentration and illuminance; acquiring environment factor data through corresponding environment factor sensors in an environment factor acquisition system, reading through a controller communication port of the single-shed control cabinet, respectively addressing each environment factor sensor by adopting a 485 bus communication network through the controller communication port, and then reading each environment factor in turn by a PLC host of the single-shed control cabinet;
film rolling motor of monomer canopy: the film rolling motor is used for controlling the opening and closing of the top film and the side film of the single shed, adopts direct-current 24V low-voltage electricity, and is provided with a portable film rolling power supply; when the single shed control cabinet has a problem or is in a power failure state and cannot be used, a cable of the single shed film rolling motor is connected into the portable film rolling power supply quick connector, so that the normal work of the single shed film rolling motor is ensured;
monomer canopy electron water valve and monomer canopy pressure transmitter: the single-shed electronic water valves are installed on the shed entering main water pipes of each single shed, and the voltage of the water valves is 24V direct current; the single shed electronic water valve is installed and is connected with a manual ball valve in parallel, and the manual ball valve is used for preventing the single shed electronic water valve from being opened after a fault occurs, and controlling the opening and closing of a water path; the shed entering water main pipe of each single shed is simultaneously provided with a single shed pressure transmitter for measuring the water pressure of a shed entering pipeline; the PLC host controls the solid-state relay by outputting a PWM (pulse width modulation) square wave, and the solid-state relay outputs a modulated voltage to drive the electronic water valve of the single shed;
the constant-pressure water supply control principle is as follows:
firstly, starting a constant-pressure water supply system, and then outputting a 100% duty ratio by a PLC (programmable logic controller) host of the single shed control cabinet, so that the single shed electronic water valve works at full voltage, and the single shed electronic water valve is conveniently and completely opened; then, delay operation is carried out according to delay time set by the distance between the electronic water valve of the single shed and the constant-pressure water supply system, after the delay is finished, the PLC host collects a water pressure value, when the water pressure does not reach the set pressure P1, the failure of the pipeline or the electronic water valve of the single shed is indicated, the single shed control cabinet gives an alarm, and a maintainer is informed to carry out inspection; when the water pressure reaches the set pressure P1, the PLC host gradually reduces the duty ratio to the low-limit duty ratio a1, the water pressure is read in a delayed mode again, when the water pressure reaches the set low-limit pressure P2, the pipeline and the electronic water valve work normally, and the electronic water valve operates all the time according to the current duty ratio a 1; when the water pressure does not reach the set low pressure limiting force P2, the PLC host outputs the square wave with the duty ratio of 100% again, the set delay time carries out delay operation, then the PLC host reduces the duty ratio to the second low duty ratio a2 again, the water pressure is read in a delayed mode, and when the water pressure reaches the set low pressure limiting force P2, the operation is continued according to the current duty ratio; the duty ratio a2 is larger than a1 so as to ensure that the electronic water valve of the single shed can maintain a normal open state; when the duty ratio is reduced to a2, the water pressure cannot reach the set low pressure limiting force P2, the electronic water valve of the pipeline or the single shed is in fault, the water supply is stopped, and the alarm is given; the low-limit duty ratio a1 and the secondary low-limit duty ratio a2 are preset values of the system;
the multi-span shed control system comprises a multi-span shed control cabinet, an indoor environment factor acquisition system, an internal and external shading motor, an internal and external circulating fan, a wet curtain light supplement system, a multi-span shed electronic water valve and a multi-span shed pressure transmitter;
the multi-span shed control cabinet is connected with an indoor environment factor acquisition system, an internal and external shading motor, an internal and external circulating fan, a wet curtain light supplement system, a multi-span shed electronic water valve and a multi-span shed pressure transmitter;
the multi-span shed control cabinet has the same structure as the single shed control cabinet, is used for collecting data of environmental factors in the multi-span shed, and simultaneously controls an internal and external shading motor, an internal and external circulating fan, a wet curtain and a light supplementing system in the multi-span shed; the multi-span shed control cabinet is generally placed in a shed, and meanwhile, the water pressure of a water inlet in the shed needs to be collected, and the pressure at the water inlet is sent to a field monitoring computer; then the on-site monitoring computer performs constant-pressure water supply according to the water pressure value;
indoor environmental factor collection system includes air temperature and humidity sensor, soil pH value sensor, soil EC value sensor, CO2 concentration sensor and illuminance sensor: the environmental factors in the multi-span greenhouse comprise air temperature and humidity, soil pH value, soil EC value, CO2 concentration and illuminance; data acquisition of corresponding environmental factors is carried out through corresponding environmental factor sensors, reading is carried out through a controller communication port in the multi-span shed control cabinet, the controller communication port adopts a 485 bus communication network, and the control mode is the same as that of a single shed;
the inner and outer shading motors comprise an inner shading part and an outer shading part, can be opened and closed in a crossed manner to adjust the illuminance information in the shed, adopt 380V three-phase asynchronous motors, are internally provided with front and rear limit switches, and need to automatically cut off a power supply to stop the operation of the motors when the inner and outer shading parts are completely opened or closed; every 4 internal and external shading motors are divided into a group as a control point; the number of the internal and external shading motors is set according to practical application;
internal and external circulating fans: the circulating fan is divided into an inner circulating part and an outer circulating part, and 380V three-phase alternating current asynchronous motors are adopted; 4 internal circulation fans and 4 external circulation fans are divided into a group and used as a control point; the sun shading can be used for alternately opening and closing the circulating fan, so that the multistage adjustment of the circulating fan is realized; the number of the internal and external circulating fans is set according to practical application;
wet curtain light filling system include wet curtain and light filling system: the wet curtains are controlled in groups through water pumps, 2 wet curtains share one water pump and serve as a control point, and the number of the specific wet curtains is set according to actual application; the light supplement system comprises 4 rows of light supplement lamps, wherein 1 row and 3 rows are a control point; 2. 4 rows are used as a control point, and the illumination intensity is divided into three modes of strong, medium and weak by alternately starting the light supplement lamps;
the multi-span greenhouse electronic water valve and the multi-span greenhouse pressure transmitter: the working modes of the multi-span shed electronic water valve and the multi-span shed pressure transmitter are the same as those of the single shed; an electronic water valve of the multi-span greenhouse and a pressure transmitter of the multi-span greenhouse are arranged on a greenhouse entering water main of the multi-span greenhouse, and the voltage of the water valve is 24V direct current; after entering the multi-span greenhouse, the in-greenhouse water main pipe is shunted according to the actual planting scale, and each branch water pipe is also provided with a multi-span greenhouse electronic water valve and a multi-span greenhouse pressure transmitter; the multi-span shed electronic water valve is installed and is connected with a manual ball valve in parallel, so that the phenomenon that the multi-span shed electronic water valve cannot be opened after a fault occurs is prevented, and the manual ball valve is used for controlling the opening and closing of a water path;
the water supply control cabinet is connected with an outdoor environmental factor acquisition system, a water and fertilizer proportioning valve, a water supply system electronic water valve and a water supply system pressure transmitter;
the structure of water supply control cabinet is the same with monomer canopy switch board structure: the system is used for monitoring the water pressure of a pump house water outlet main pipe and water supply points of all the sheds and periodically irrigating all the shed areas in a rotation mode according to a set program; collecting the outdoor environment factors through an outdoor environment factor collecting system; the serial port of a PLC host in the water supply control cabinet is connected to a 485 bus communication network, the 485 bus communication network is connected with each sensor of the outdoor environmental factor acquisition system, and the PLC host acquires data of each sensor one by one in a round training mode;
the outdoor environmental factor acquisition system comprises an air temperature and humidity sensor, a illuminance sensor, a wind sensor and a wind direction sensor and is used for acquiring 4 outdoor environmental factors of air temperature, humidity, illuminance, wind power and wind direction;
the water and fertilizer proportioning valve is arranged at a water outlet main pipe of the pump room and is used for allocating the concentration of water and liquid medicine, and the liquid medicine with different proportions is automatically allocated according to the preset program in the water supply control cabinet and the proportioning requirements of different types of liquid fertilizers so as to achieve the optimal state of plant growth;
the water supply system electronic water valve and the water supply system pressure transmitter are arranged on the pump room water outlet main pipe and the water outlet main pipe of the pump room to each multi-span shed and single shed water supply point, and are used for acquiring the pressure state of each water supply point and detecting the state of the water outlet main pipe of the pump room; when the difference value between the pressure of the water outlet main pipe of the pump room and the pressure of the water supply point exceeds a set threshold value, the fact that the filter of the pump room needs to be cleaned is indicated; if the filter is cleaned and the pressure of the water supply point is still low, the water way of the water outlet main pipe of the pump room is blocked, the filters and valves of the branch pipes are checked one by one along the direction of the main pipe, and the blocked point is found out for cleaning; the voltage of the electronic water valve of the water supply system is 24V direct current.
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| CN107453470B (en) * | 2015-08-10 | 2020-06-19 | 中国计量大学 | Self-regulating temperature and pressure water spraying and illuminating device |
| CN107950254A (en) * | 2017-12-16 | 2018-04-24 | 何同江 | A kind of water-fertilizer-pesticide all-in-one machine and method of work |
| CN108919754A (en) * | 2018-06-21 | 2018-11-30 | 马鞍山中粮生物化学有限公司 | A kind of intelligence greenhouse real-time monitoring system and monitoring method |
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Application publication date: 20210309 Assignee: Hangzhou changbang Technology Co.,Ltd. Assignor: HANGZHOU DIANZI University Contract record no.: X2022330000672 Denomination of invention: An intelligent greenhouse control system Granted publication date: 20220617 License type: Common License Record date: 20221121 |