WO2018058820A1

WO2018058820A1 - Greenhouse environment regulation method, device and smart greenhouse

Info

Publication number: WO2018058820A1
Application number: PCT/CN2016/112329
Authority: WO
Inventors: 张军
Original assignee: 深圳前海弘稼科技有限公司
Priority date: 2016-09-30
Filing date: 2016-12-27
Publication date: 2018-04-05
Also published as: CN106168822A

Abstract

Disclosed are a greenhouse environment regulation method, device and a smart greenhouse. The greenhouse environment regulation method comprises: acquiring air temperature information and relative humidity information of the greenhouse environment (S101); calculating a saturation water vapor pressure difference in the current greenhouse environment by using the air temperature information and the relative humidity information (S102); determining whether the saturation water vapor pressure difference is within a preset suitable range (S103); if so, determining the current greenhouse environment as a suitable environment (S104); and if not, performing a corresponding regulation operation according to the saturation water vapor pressure difference and the preset suitable range (S105). This manner of regulating a greenhouse by calculating the saturation water vapor pressure difference can take two environmental factors including temperature and humidity into account at the same time, thereby being more comprehensive than existing technology. Further, the mechanism of transpiration in crops is also taken into consideration and is used to create more beneficial environmental conditions for the growth of the crops, thus achieving high yield and high quality, and facilitating the accurate and automated control of the greenhouse environment.

Description

Greenhouse environment regulation method, device and intelligent greenhouse

This application claims priority to Chinese Patent Application No. 201610875331.9, entitled "Greenhouse Environment Control Method, Device and Intelligent Greenhouse", filed on September 30, 2016, the entire contents of which are incorporated by reference. In this application.

Technical field

The invention relates to the technical field of greenhouse environment regulation, and more particularly to a greenhouse environment regulation method and device and a smart greenhouse.

Background technique

At present, in order to create the most suitable growth environment for the growth of plants in the greenhouse, the temperature and humidity in the greenhouse are generally controlled by changing the operating state of each actuator in the greenhouse, and the control device is activated when the upper and lower limits of the set parameters are exceeded. Until the environmental parameters reach the set range. However, this kind of greenhouse environment regulation mainly regulates temperature and humidity separately. Because of the mutual influence of the two, especially the air humidity is affected by temperature, unstable, and difficult to control. If the temperature and humidity regulation are combined, the situation will be It has become more complicated. Therefore, the control of temperature and humidity in actual production is mostly fuzzy control, and it is difficult to comprehensively control temperature and humidity.

Therefore, how to comprehensively regulate the temperature and humidity in the greenhouse environment to provide a suitable environment for the normal growth and development of plants is a problem to be solved by those skilled in the art.

Summary of the invention

The object of the present invention is to provide a greenhouse environment regulation method and device and an intelligent greenhouse to comprehensively regulate the temperature and humidity in a greenhouse environment, and provide a suitable environment for the normal growth and development of plants.

To achieve the above objective, the embodiment of the present invention provides the following technical solutions:

A greenhouse environmental regulation method includes:

Obtaining air temperature information and relative humidity information in a greenhouse environment;

Calculating a saturated water vapor pressure difference in the current greenhouse environment by using the air temperature information and the relative humidity information;

Determining whether the saturated water vapor pressure difference is within a preset suitable range;

If yes, it is determined that the current greenhouse environment is a suitable environment; if not, the corresponding control operation is performed according to the saturated water vapor pressure difference value and the preset suitable range.

The performing the corresponding control operation according to the saturated water vapor pressure difference value and the preset suitable range, including:

Determining whether the saturated water vapor pressure difference is higher than the preset suitable range;

If yes, perform a humidification and cooling operation; if not, perform a humidification and warming operation.

Wherein the performing the humidifying and cooling operation comprises:

Calculating a first difference between the saturated water vapor pressure difference value and the maximum value of the suitable range;

Determining a first operational level corresponding to the first difference;

An operational command corresponding to the first operational level is generated and sent to the microspray system.

Wherein the performing the humidification and warming operation comprises:

Calculating a second difference between the saturated water vapor pressure difference value and the minimum value of the suitable range;

Determining a second operational level corresponding to the second difference;

An operational command corresponding to the second operational level is generated and sent to the ventilation system.

After the operation instruction corresponding to the second operation level is sent to the ventilation system, the method further includes:

If, after the first predetermined time interval, it is detected that the saturated water vapor pressure difference in the current greenhouse environment is lower than the preset suitable range, a warming command is issued to the warming system.

A greenhouse environmental regulation device, comprising:

Obtaining a module for obtaining air temperature information and relative humidity information in a greenhouse environment;

a calculation module, configured to calculate, by using the air temperature information and the relative humidity information, a saturated water vapor pressure difference in a current greenhouse environment;

a determining module, configured to determine whether the saturated water vapor pressure difference is within a preset suitable range; if yes, determining that the current greenhouse environment is a suitable environment; if not, triggering a control module;

The control module is configured to perform a corresponding control operation according to the saturated water vapor pressure difference value and the preset suitable range when the determining module determines that the saturated water pressure is not within a preset suitable range.

The control module includes:

a determining unit, configured to determine whether the saturated water vapor pressure difference is higher than the preset suitable range;

If yes, triggering the first execution unit; if not, triggering the second execution unit;

The first execution unit is configured to perform a humidification and cooling operation;

The second execution unit is configured to perform a humidification and warming operation.

The first execution unit includes:

a first calculating subunit, configured to calculate a first difference between the saturated water vapor pressure difference value and the maximum value of the suitable range;

a first determining subunit, configured to determine a first operating level corresponding to the first difference value;

The first sending subunit is configured to generate an operation instruction corresponding to the first operation level, and send the operation instruction to the micro spray system.

The second execution unit includes:

a second calculating subunit, configured to calculate a second difference between the saturated water vapor pressure difference value and the minimum value of the suitable range;

a second determining subunit, configured to determine a second operation level corresponding to the second difference value;

And a second sending subunit, configured to generate an operation instruction corresponding to the second operation level, and send the operation instruction to the ventilation system.

The second execution unit further includes:

The third sending subunit is configured to send a warming command to the warming system after detecting that the saturated water vapor pressure difference in the current greenhouse environment is lower than the preset suitable range after the first predetermined time interval.

A smart greenhouse comprising the greenhouse environment regulating device according to any one of the above.

The solution of the greenhouse environment according to the embodiment of the present invention includes: obtaining air temperature information and relative humidity information in a greenhouse environment; and calculating the current greenhouse environment by using the air temperature information and the relative humidity information. a saturated water vapor pressure difference; determining whether the saturated water vapor pressure difference is within a preset suitable range; if so, determining that the current greenhouse environment is a suitable environment; if not, according to the saturated water vapor pressure difference and Describe the appropriate range of presets and perform corresponding control operations;

It can be seen that in the present embodiment, by calculating the saturated water pressure difference for the greenhouse regulation, the two environmental factors of temperature and humidity can be considered simultaneously, which is more comprehensive than the prior art, and is considered from the mechanism of crop transpiration. Creating more favorable environmental conditions for crop growth, ultimately achieving high-yield and high-quality production targets, and also facilitating precise control and automated control of the greenhouse environment; the present invention also provides The greenhouse environmental regulation device and the intelligent greenhouse can also achieve the above technical effects.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic flow chart of a greenhouse environment regulation method according to an embodiment of the present invention;

2 is a schematic diagram of a greenhouse environment regulation process disclosed in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a greenhouse environment regulating device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the invention discloses a greenhouse environment regulation method and device and an intelligent greenhouse, so as to comprehensively regulate the temperature and humidity in the greenhouse environment, and provide a suitable environment for the normal growth and development of the plant.

Referring to FIG. 1 , a method for regulating a greenhouse environment according to an embodiment of the present invention includes:

S101. Obtain air temperature information and relative humidity information in a greenhouse environment;

S102. Calculate, by using the air temperature information and the relative humidity information, a saturated water vapor pressure difference in a current greenhouse environment;

It should be noted that the transpiration of plants is the main source of water and organic transport, which is of great significance to the life activities of plants. Although there are many factors affecting crop transpiration, the rate of water vapor spreading from the leaves to the outside is very large. The difference between the vapor pressure in the intercellular space and the vapor pressure in the outside atmosphere. This vapor pressure difference is affected by both temperature and humidity. Therefore, it is difficult to maintain the crop transpiration at an appropriate level only by regulating the environment from a single factor of temperature or humidity.

In this program, by regulating the difference in the saturated water pressure in the greenhouse, the transpiration level of the crop can be more effectively regulated. Here, the saturated water pressure difference (VPD) is the saturated water vapor pressure difference, which is the difference between the saturated water vapor pressure and the actual vapor pressure in the air at a certain temperature. It represents the actual air distance from the water vapor saturation. The degree of state is affected by both temperature and humidity. VPD affects the closure of plant stomata, which controls the physiological processes such as transpiration and photosynthesis of plants, and has an important impact on the evapotranspiration process and water use efficiency of forest ecosystems. Therefore, in this program, the regulation of VPD can regulate wheat transpiration level more effectively than that of single factor, which is beneficial to the absorption of water and nutrients by crops, promotes crop growth and development, and affects crop photosynthesis and dry matter distribution. Finally, the purpose of increasing production is achieved.

In this embodiment, a method for calculating a VPD is provided, which is specifically:

VPD=0.611×EXP[17.502×Ta/(Ta+240.97)]×(1-RH); wherein, in the formula, EXP is an exponential function with e as a base, Ta is a greenhouse air temperature, and RH is a relative humidity.

S103. Determine whether the saturated water vapor pressure difference value is within a preset suitable range;

If yes, execute S104; if not, execute S105;

S104. Determine that the current greenhouse environment is a suitable environment;

S105. Perform a corresponding regulation operation according to the saturated water vapor pressure difference value and the preset suitable range.

Specifically, in the present scheme, when it is detected that the current saturated water vapor pressure difference in the room is in an appropriate range, it indicates that the current greenhouse environment is a suitable environment; if it is detected that the current indoor saturated water vapor pressure difference is not in a suitable range, then If the current greenhouse environment is an environment that is not suitable for plant growth, the corresponding regulation operation is performed until the saturated water vapor pressure difference in the greenhouse is within an appropriate range.

The embodiment of the invention discloses a specific greenhouse environment control method. Compared with the previous embodiment, the technical solution is further illustrated and optimized in this embodiment. Specifically, performing corresponding control operations according to the saturated water vapor pressure difference value and the preset suitable range, including:

It should be noted that the VPD suitable for crop growth should be kept within a suitable range. If the VPD exceeds the appropriate range, the current greenhouse is determined to be a high temperature and low humidity environment. In this case, The water in the roots of the crops in the greenhouse cannot meet the needs of transpiration. The crops can survive by reducing transpiration, such as reducing the leaf area or closing the stomata. However, no matter which way, the plants will grow slowly, and the pollen vigor will decrease and the flowers will be increased. Therefore, in the present embodiment, if it is detected that the VPD exceeds the appropriate range, the humidification and cooling operation is performed on the greenhouse to increase the humidity of the greenhouse, lower the temperature of the greenhouse, and reduce the VPD value of the greenhouse to a suitable range; After the VPD falls to the appropriate range, the humidification and cooling operation is stopped;

If the VPD is lower than the appropriate range, it is determined that the current greenhouse is a high-humidity environment. In this case, the over-humidity crop is prone to grow up, which also affects pollination and fertilization, thereby affecting fruit setting, and also causes calcium deficiency in tomato and cucumber leaves. Magnesium deficiency, leaves chlorosis, photosynthetic decline. Therefore, in the present embodiment, if it is detected that the VPD is lower than the suitable range, the cooling and humidifying operation is performed on the greenhouse to reduce the humidity of the greenhouse, and the VPD value of the greenhouse is raised to a suitable range; when the VPD is detected to rise to an appropriate range After that, the execution of the humidification and warming operation is stopped.

Referring to FIG. 2, in the present solution, the suitable range of VPD is set to 0.3 to 1 kPa; if it is higher than 1 kPa, the humidification and cooling operation is performed; if it is lower than 0.3 kPa, the humidification and heating operation is performed until the appropriate range is adjusted. To the appropriate range.

The embodiment of the invention discloses a specific greenhouse environment control method. Compared with the previous embodiment, the technical solution is further illustrated and optimized in this embodiment. specific:

The performing the humidifying and cooling operation comprises:

Calculating a first difference between the saturated water vapor pressure difference value and the maximum value of the suitable range; determining a first operation level corresponding to the first difference value; generating an operation instruction corresponding to the first operation level, and Send to the micro spray system.

Specifically, in the embodiment, when the VPD is too high, the micro-spray system can be humidified to achieve the humidification and cooling effects, thereby reducing the VPD; it can be understood that since the VPD is higher than the appropriate range, the degree is usually different. It is possible to set a plurality of level ranges beyond the appropriate range, determine the current range of the current greenhouse according to the difference between the current VPD and the normal range, and generate corresponding operation instructions according to the degree of humidification and temperature reduction corresponding to the level range, where the operation command and humidification and cooling are performed. Corresponding to the degree, that is, the greater the difference, the more humidification and cooling is required, and the operation command controls the spray system to generate a larger amount of spray.

Similarly, the performing the humidifying and warming operation in the solution includes:

Calculating a second difference between the saturated water vapor pressure difference value and the minimum value of the suitable range; determining a second operation level corresponding to the second difference value; generating an operation instruction corresponding to the second operation level, and Send to the ventilation system.

Correspondingly, in the present embodiment, when the VPD is too low, the greenhouse needs to be dehumidified, generally for ventilation. Similarly, since the degree of VPD is generally lower than the appropriate range, it is possible to set a plurality of level ranges below the appropriate range, and determine the current range in which the current greenhouse is in accordance with the difference between the current VPD and the normal range, according to the level range. The degree of dehumidification and warming generates corresponding operation instructions. The operation command here corresponds to the degree of humidification and temperature drop, that is, the larger the difference, the more humidity is required, and the operation command controls the ventilation system to be more ventilated.

It should be noted that since the greenhouse temperature is generally higher than the external environment temperature, the ventilation system in this scheme plays a major role in dehumidification, but in order to prevent the greenhouse from being effectively dehumidified only by ventilation, in this scheme After the operation instruction corresponding to the second operation level is sent to the ventilation system, the method further includes:

It can be seen that if the ventilation is not able to talk about the appropriate range of VPD improvement after the first predetermined time interval, the heating operation can be performed by the heating system to improve the VPD.

It should be noted that in this solution, not only the VPD value of the greenhouse can be set in real time, but also the VPD value of the greenhouse can be calculated at predetermined time intervals, and the VPD calculated every day can be recorded as needed and is not within the appropriate range. The operation is performed for the staff to analyze; and the valid time of the saved VPD data can be set. If the VPD data exceeds the saved valid time, it is directly deleted.

Specifically, in order to prevent the temperature and humidity of the room from being adjusted in time due to the failure of the micro-spray system, the ventilation system or the heating system, a time threshold may be set to start when the current greenhouse VPD value is not within the appropriate range. Timing, if the VPD value of the greenhouse is still not adjusted to the appropriate range after detecting the time threshold, it is determined that there may be a failure in the micro-spray system, the ventilation system or the heating system, then the faulty system is analyzed, and prompt information is generated in time. And sent to the staff.

It can be seen that the scheme combines temperature and humidity to solve the contradiction between temperature and humidity in greenhouse environmental control, and is more comprehensive than single environmental control; compared with traditional fuzzy control, it is more advantageous to achieve precise control of greenhouse environment, and VPD is the meaning of atmospheric physical kinetics. The regulation of environment by VPD is considered from the mechanism of crop transpiration and is more scientific than traditional empirical regulation.

The greenhouse environment regulating device provided by the embodiment of the present invention is introduced below, and the greenhouse environment regulating device described below and the greenhouse environment regulating method described above can be cross-referenced.

Referring to FIG. 3, a greenhouse environment control device according to an embodiment of the present invention includes:

The obtaining module 100 is configured to obtain air temperature information and relative humidity information in a greenhouse environment;

The calculating module 200 is configured to calculate, by using the air temperature information and the relative humidity information, a saturated water vapor pressure difference in a current greenhouse environment;

The determining module 300 is configured to determine whether the saturated water vapor pressure difference is within a preset suitable range; if yes, determining that the current greenhouse environment is a suitable environment; if not, triggering the control module 400;

The control module 400 is configured to perform a corresponding control operation according to the saturated water vapor pressure difference value and the preset suitable range when the determining module determines that the saturated water pressure is not within a preset suitable range. .

Based on the foregoing technical solution, the control module includes:

Based on the foregoing technical solution, the first execution unit includes:

Based on the foregoing technical solution, the second execution unit includes:

Based on the foregoing technical solution, the second execution unit further includes:

An embodiment of the present invention provides a smart greenhouse, comprising the greenhouse environment control device according to any one of the above.

It should be noted that in this solution, the saturated water vapor pressure difference in the current greenhouse environment can also be obtained through the terminal, so that the staff can understand the greenhouse environment in real time and perform monitoring; the terminal here can be a mobile computer.

A method for regulating a greenhouse environment according to an embodiment of the present invention includes: obtaining air temperature information and relative humidity information in a greenhouse environment; and calculating a saturated water vapor pressure difference in a current greenhouse environment by using the air temperature information and the relative humidity information; a value; determining whether the saturated water vapor pressure difference is within a preset suitable range; if yes, determining that the current greenhouse environment is a suitable environment; if not, determining the saturated water vapor pressure difference and the preset appropriate Range, perform corresponding control operations;

It can be seen that in the present embodiment, by calculating the saturated water pressure difference for the greenhouse regulation, the two environmental factors of temperature and humidity can be considered simultaneously, which is more comprehensive than the prior art, and is considered from the mechanism of crop transpiration. Creating more favorable environmental conditions for crop growth, and finally achieving high-yield and high-quality production targets, and also facilitating precise control and automatic control of the greenhouse environment; the present invention also provides a greenhouse environment control device and a smart greenhouse, which can also achieve the above Technical effects.

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but the scope of the invention is to be accorded

Claims

A method for regulating greenhouse environment, characterized in that it comprises:

Obtaining air temperature information and relative humidity information in a greenhouse environment;

Calculating a saturated water vapor pressure difference in the current greenhouse environment by using the air temperature information and the relative humidity information;

Determining whether the saturated water vapor pressure difference is within a preset suitable range;

If yes, it is determined that the current greenhouse environment is a suitable environment, and if not, the corresponding control operation is performed according to the saturated water vapor pressure difference value and the preset suitable range.
The greenhouse environment control method according to claim 1, wherein the corresponding control operation is performed according to the saturated water vapor pressure difference value and the preset suitable range, including:

Determining whether the saturated water vapor pressure difference is higher than the preset suitable range;

If yes, perform a humidification and cooling operation, and if not, perform a humidification and warming operation.
The greenhouse environment control method according to claim 2, wherein the performing the humidifying and cooling operation comprises:

Calculating a first difference between the saturated water vapor pressure difference value and the maximum value of the suitable range;

Determining a first operational level corresponding to the first difference;

An operational command corresponding to the first operational level is generated and sent to the microspray system.
The greenhouse environment regulation method according to claim 2, wherein the performing the humidification and warming operation comprises:

Calculating a second difference between the saturated water vapor pressure difference value and the minimum value of the suitable range;

Determining a second operational level corresponding to the second difference;

An operational command corresponding to the second operational level is generated and sent to the ventilation system.
The greenhouse environment control method according to claim 4, wherein after the operation instruction corresponding to the second operation level is sent to the ventilation system, the method further includes:

If, after the first predetermined time interval, it is detected that the saturated water vapor pressure difference in the current greenhouse environment is lower than the preset suitable range, a warming command is issued to the warming system.
A greenhouse environmental regulation device, comprising:

Obtaining a module for obtaining air temperature information and relative humidity information in a greenhouse environment;

a calculation module, configured to calculate a current greenhouse by using the air temperature information and the relative humidity information The difference in saturated water vapor pressure in the environment;

a judging module, configured to determine whether the saturated water vapor pressure difference is within a preset suitable range, and if so, determining that the current greenhouse environment is a suitable environment, and if not, triggering a control module;

The control module is configured to perform a corresponding control operation according to the saturated water vapor pressure difference value and the preset suitable range when the determining module determines that the saturated water pressure is not within a preset suitable range.
The greenhouse environment control device according to claim 6, wherein the regulation module comprises:

a determining unit, configured to determine whether the saturated water vapor pressure difference is higher than the preset suitable range;

If yes, triggering the first execution unit, and if not, triggering the second execution unit;

The first execution unit is configured to perform a humidification and cooling operation;

The second execution unit is configured to perform a humidification and warming operation.
The greenhouse environment control device according to claim 7, wherein the first execution unit comprises:

a first calculating subunit, configured to calculate a first difference between the saturated water vapor pressure difference value and the maximum value of the suitable range;

a first determining subunit, configured to determine a first operating level corresponding to the first difference value;

The first sending subunit is configured to generate an operation instruction corresponding to the first operation level, and send the operation instruction to the micro spray system.
The greenhouse environment control device according to claim 7, wherein the second execution unit comprises:

a second calculating subunit, configured to calculate a second difference between the saturated water vapor pressure difference value and the minimum value of the suitable range;

a second determining subunit, configured to determine a second operation level corresponding to the second difference value;

And a second sending subunit, configured to generate an operation instruction corresponding to the second operation level, and send the operation instruction to the ventilation system.
The greenhouse environment control device according to claim 9, wherein the second execution unit further comprises:

a third sending subunit, configured to detect the current greenhouse environment after the first predetermined time interval If the saturated water vapor pressure difference is lower than the preset suitable range, a warming command is issued to the heating system.
A smart greenhouse characterized by comprising the greenhouse environment regulating device according to any one of claims 6-10.