LU505387B1 - Control system and method with adjustable shading rate in solar greenhouse - Google Patents

Control system and method with adjustable shading rate in solar greenhouse Download PDF

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Publication number
LU505387B1
LU505387B1 LU505387A LU505387A LU505387B1 LU 505387 B1 LU505387 B1 LU 505387B1 LU 505387 A LU505387 A LU 505387A LU 505387 A LU505387 A LU 505387A LU 505387 B1 LU505387 B1 LU 505387B1
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LU
Luxembourg
Prior art keywords
shading
shading net
greenhouse film
greenhouse
light intensity
Prior art date
Application number
LU505387A
Other languages
French (fr)
Inventor
Yong Yang
Yuzhu Gong
Yang Xie
Jingguo Hao
Jie Li
Yue Wu
Jin Yuan
Original Assignee
Zhongtai Power Plant Of Huaneng Shandong Power Generation Co Ltd
Univ Shandong Agricultural
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Publication of LU505387B1 publication Critical patent/LU505387B1/en

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/22—Shades or blinds for greenhouses, or the like
    • A01G9/227—Shades or blinds for greenhouses, or the like rolled up during non-use
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/22—Shades or blinds for greenhouses, or the like
    • A01G9/222—Lamellar or like blinds
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/26—Pc applications
    • G05B2219/2642—Domotique, domestic, home control, automation, smart house
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Greenhouses (AREA)

Abstract

The present invention discloses a control system with an adjustable shading rate in a solar greenhouse, and the system includes a sensor module, a control module and an action execution module, specifically, the sensor module is connected to the control module, and is configured to detect meteorological data and crop growth data at an interior and an exterior of the solar greenhouse; the control module is connected to the sensor module and the action execution module, and is configured to make a decision based on the meteorological data and crop growth data detected by the sensor module; and the action execution module is connected to the control module, and is configured to receive instructions and cooperate with the control module to complete shading operations. According to the present invention, a shading device in the solar greenhouse is controlled and a shading rate is dynamically adjusted, so as to realize efficient production of indoor crops.

Description

CONTROL SYSTEM AND METHOD WITH ADJUSTABLE SHADING RATE IN LU505387
SOLAR GREENHOUSE
TECHNICAL FIELD
The present invention belongs to the technical field of facility agriculture, and relates to a control system and method with an adjustable shading rate in a solar greenhouse, so that the solar greenhouse may meet the normal growth of crops by dynamically adjusting the shading rate of lighting surface according to the light requirements of crops.
BACKGROUND
Solar greenhouse is a unique type of greenhouse in northern China, and the internal temperature of solar greenhouse changes obviously with the seasonal change of external temperature. In cold winter and early spring, the temperature is low, so the greenhouse film is required to be covered with a thermal insulation quilt for thermal insulation, while in summer, the external temperature is high and the light is sufficient, so the external light entering the room is required to be reduced by laying of a shading net so as to cool down. However, the existing shading devices in solar greenhouses, represented by the shading nets, have a low degree of automation, and most of the shading nets are opened or closed manually or electrically, and the opening time and opening range still rely on human experience; and there are significant differences in the light entering the room due to the great change of sunlight from morning to night, and there are also differences in the requirements for sunlight in different growth stages of plants, so if simply relying on the human experience or timing to open or close the shading nets is adopted, the damages caused by strong light to indoor plants may be avoided, but the opportunity for indoor plants to obtain effective light is invisibly weaken to affect the normal growth of plants. By means of the literature retrieval of the prior art, it is found that the patent
Automatic Folding or Unfolding Device and Method for Shading Net in Greenhouse (No.: 2018112929943) includes a greenhouse supporting frame, a baffle, an automatic folding or unfolding mechanism and a shading net, and the patent realizes the automatic operation management of the shading net according to the light requirements of different crops, but the light requirements in the patent only mention the light time, and there are no relevant descriptions about the opening time, opening range and closing time of the shading net. The patent Automatic External Shading System for Solar Greenhouse (No.: 201710785320.6) includes a rotating device, a greenhouse frame, a shading net, a controller and a temperature and light sensor, the control of the external shading system is realized in a manual mode or an automatic mode, and the automatic mode is performed as follows: the shading net is opened or closed based on temperature and radiation threshold; and the variable of indoor environmental parameters is considered for making the control decision, but there are no relevant descriptioh$/505387 about the shading rate and the shading percentage in the related descriptions of the shading net.
Therefore, in view of the problems in the existing control of the shading device in the solar greenhouse, it is urgent to invent a control system and method with an adjustable shading rate in a solar greenhouse, so that the crops planted in the greenhouse grow normally in the high temperature and strong light environment in summer.
SUMMARY
Aiming at the shortcomings in the prior art, the present invention provides a control system and method with an adjustable shading rate in a solar greenhouse, specifically, on the premise of not changing the external structure of the existing solar greenhouse, a shading device is arranged on the solar greenhouse externally to dynamically adjust the shading rate, so as to perform automatic shading operations according to the light requirements of crops conveniently and realize efficient production of indoor crops.
The present invention provides a control system with an adjustable shading rate in a solar greenhouse, and the system includes a sensor module, a control module and an action execution module, specifically, the sensor module is connected to the control module, and is configured to detect meteorological data and crop growth data at an interior and an exterior of the solar greenhouse; the control module is connected to the sensor module and the action execution module, and is configured to make a decision based on the meteorological data and crop growth data detected by the sensor module and then send instructions to the action execution module; and the action execution module is connected to the control module, and is configured to receive the instructions and cooperate with the control module to complete shading operations.
The sensor module includes a light sensor and an image sensor; the light sensor is installed at the interior and exterior of the solar greenhouse to monitor a light intensity at the interior and exterior of the solar greenhouse; and the image sensor 1s installed at the interior of the solar greenhouse to monitor a crop growth situation in the solar greenhouse.
The control module includes a processor module, a power module, a driving module and two roller shutter motors; the processor module is connected to the sensor module, the power module, the driving module and the two roller shutter motors, and is configured to make the decision based on the light intensity and the crop growth situation collected by the sensor module, and then convert the decision into an action signal may be recognized by the driving module; the power module is connected to and powers the processor module, the driving module and the two roller shutter motors; the driving module 1s connected to the processor module and the two roller shutter motors, and is configured to receive the action signal sent by the processor module and drive the two roller shutter motors to complete rotation; and the two roller shutter motors are installed at a top and a bottom of the solar greenhouse, electrically connected to the drivit&/505387 module and mechanically connected to the action execution module, and are configured to drive the action execution module to act so as to complete a shading task.
The action execution module includes a shading net above a greenhouse film, an upper reel, a reel supporting frame and a lower reel. The shading net above the greenhouse film includes a shading net I, a shading net II and three ropes, specifically, the shading net I and the shading net
II have different shading rates but the same size, one end of the shading net I is connected to the upper reel and the other end is connected to the shading net II, and one end of the shading net II is connected to the shading net I and the other end is connected to the three ropes; the three ropes are equal in length, one ends of the three ropes are connected to the shading net II and the other ends are connected to the lower reel; the upper reel is arranged on the reel supporting frame, one end of the upper reel is connected to the top roller shutter motor, and a surface of the upper reel is connected to one end of the shading net I so as to drive the shading net I to move by rotation of the upper reel; the reel supporting frame is installed at a rear upper part, where a thermal insulation quilt is completely rolled up, of the top of the solar greenhouse and has a certain height, supports the upper reel without limiting the rotation of the upper reel, and is configured to separate the shading net above the greenhouse film from the thermal insulation quilt to prevent mutual interference therebetween during working; and a surface of the lower reel is connected to the three ropes, so as to drive the three ropes to move by rotation of the lower reel, and one end of the lower reel is connected to the bottom roller shutter motor.
The present invention provides a control method with an adjustable shading rate in a solar greenhouse, and the method includes the following steps:
S1. device operation: the upper reel, the lower reel and the two roller shutter motors rotate together to realize opening or closing of the shading net above the greenhouse film; the top roller shutter motor connected to the upper reel rotates forward to drive the upper reel to rotate clockwise, and then the shading net above the greenhouse film is driven to roll up, and at the same time, the bottom roller shutter motor connected to the lower reel rotates forward to drive the lower reel to rotate clockwise, and then a part of the shading net above the greenhouse film, wound on the lower reel, is released and driven to roll up, and when the two roller shutter motors stop, the whole shading net above the greenhouse film stops moving; and the bottom roller shutter motor connected to the lower reel rotates backward to drive the lower reel to rotate counterclockwise, and then the shading net above the greenhouse film is driven to roll down, and at the same time, the top roller shutter motor connected to the upper reel rotates backward to drive the upper reel to rotate counterclockwise, and then a part of the shading net above the greenhouse film, wound on the upper reel, is released and driven to roll down, and when the tvké/505387 roller shutter motors stop, the whole shading net above the greenhouse film stops moving;
S2. adjustment of an effective shading rate of the shading net above the greenhouse film: the shading net above the greenhouse film consists of three parts including the shading net I, the shading net II and the three ropes, and the three parts may just completely cover the greenhouse film alone; assuming that a shading rate of the shading net I is p1, the shading rate of the shading net II is p2, with p1> p2, and the three ropes wound on the greenhouse film won't affect a light, i.e., the shading rate of the three ropes is 0; and if a shading effect is required to be adjusted, that is, if an effective refractive index of the shading net above the greenhouse film is required to be changed, the following methods are used:
S201. the shading net I is partially wound on the upper reel, and the shading net II and the three ropes are completely wound on the lower reel, 1.e., the shading net above the greenhouse film is shown as the shading net I, and at this time, the effective shading rate of the shading net above the greenhouse film meets p = pi;
S202. the shading net I is partially wound on the upper reel, and the shading net II is partially and the three ropes are completely wound on the lower reel, i.e., the shading net above the greenhouse film is shown in a combination mode of the shading net I and the shading net II, and at this time, the effective shading rate of the shading net above the greenhouse film meets p2 <p <p
S203. the shading net I is completely wound on the upper reel, and the three ropes are completely wound on the lower reel, i.e., the shading net above the greenhouse film is shown as the shading net II, and at this time, the effective shading rate of the shading net above the greenhouse film meets p = pz;
S204. the shading net I is completely and the shading net IT is partially wound on the upper reel, and the three ropes are partially wound on the lower reel, i.e., the shading net above the greenhouse film is shown in the combination mode of the shading net II and the three ropes, and at this time, the effective shading rate of the shading net above the greenhouse film meets 0 <p < p2; and
S205. the shading net I and the shading net II are completely wound on the upper reel, and the three ropes are partially wound on the lower reel, i.e., there are only the three ropes on the shading net above the greenhouse film, and at this time, the effective shading rate of the shading net above the greenhouse film meets p = 0; and therefore, a dynamic adjustment range of the shading rate of the shading net above the greenhouse film is 0 <p < p1; and
S3. shading adjustment strategy:
if an indoor light intensity and an outdoor light intensity are L' and L respectively, L'i is thé/505387 indoor light intensity reaching a crop saturation light intensity point, Li is the outdoor light intensity corresponding to the indoor light intensity reaching the crop saturation light intensity point, AL1 and AL2 are smaller and larger outdoor light intensity thresholds, and AL'1 and AL" 5 are smaller and larger indoor light intensity thresholds;
S301. determining L'1: the saturation light intensity points are different in different crop growth periods, so monitoring a crop growth image, and analyzing and judging a crop growth period using an image processing technology, so as to determine the saturation light intensity points of crops in the current growth period;
S302. if L < Li, when the indoor light intensity is low without reaching the saturation light intensity points of the crops, the shading net above the greenhouse film is shown in a mode of
S2-S205 so as to ensure sufficient light in the greenhouse;
S303. if L1 < L < Li + AL1, when the indoor light intensity reaches and exceeds the saturation light intensity points of the crops, and an exceeding value is within a smaller numerical range, the shading net above the greenhouse film is shown in a mode of S2-S204; if L' > L'i+ AL'1, when the three ropes and the shading net II stop after moving down by a length Al, the effective shading rate of the greenhouse film increases and the indoor light intensity decreases; and if L' < L'i- AL'1, when the shading net II and the three ropes stop after moving up by the length Al, the effective shading rate of the greenhouse film decreases and the indoor light intensity increases;
S304. if L = Li + AL, the shading net above the greenhouse film is shown in a mode of
S2-S203;
S305. if Li+ AL1< L < Li + AL2, when the indoor light intensity exceeds the saturation light intensity points of the crops, and the exceeding value is within a larger numerical range, the shading net above the greenhouse film 1s shown in a mode of S2-S202; if L' > L'i+ AL'2, when the shading net II and the shading net I stop after moving down by the length Al, the effective shading rate of the greenhouse film increases and the indoor light intensity decreases; and if L'< L'1i- AL"2, when the shading net I and the shading net II stop after moving up by the length Al, the effective shading rate of the greenhouse film decreases and the indoor light intensity increases; and
S306. if L > Li+ AL2, when the light intensity is very strong, the shading net II and the three ropes are completely wound on the lower reel, and the shading net above the greenhouse film is in a mode of S2-S201, so as to shade strong light.
Compared with the prior art, the present invention has the following beneficial effects: | LU505387 according to the control system with an adjustable shading rate in a solar greenhouse of the present invention, in combination with the growth conditions of crops in the solar greenhouse and the indoor and outdoor light intensities, automatic shading operations are easily carried out according to the light requirements of crops, that is, the shading rate is changed according to the light intensity, so that the shading effect is better, and the vegetables planted in the greenhouse are ensured to get sufficient light in various weather conditions and finally realize efficient production of indoor crops.
BRIEF DESCRIPTION OF THE DRAWINGS
The attached drawings are provided for a further understanding of the present invention and constitute a part of the specification; and together with the examples of the present invention, the attached drawings serve to explain the present invention and do not limit the present invention.
Among them:
FIG. 1 is a structural schematic diagram for a control system with an adjustable shading rate in a solar greenhouse of the present invention;
FIG. 2 is a schematic diagram for an action execution module of the present invention; and
FIG. 3 is a schematic diagram for a shading net of the present invention.
Among them: 1-light sensor, 2-image sensor, 3-processor module, 4-driving module,
S-roller shutter motor, 6-power module, 7-upper reel, 8-lower reel, 9-shading net I, 10-shading net II, 11-rope, 12-reel supporting frame, 13-thermal insulation quilt, and 14-greenhouse film.
DETAILED DESCRIPTION
The present invention will be described in further detail below with reference to the attached drawings.
As shown in FIGs. 1-3, the present invention provides a control system with an adjustable shading rate in solar greenhouse, and the system includes a sensor module, a control module and an action execution module, specifically, the sensor module is connected to the control module, and is configured to detect meteorological data and crop growth data at an interior and an exterior of the solar greenhouse; the control module is connected to the sensor module and the action execution module, and is configured to make a decision based on the meteorological data and crop growth data detected by the sensor module and then send instructions to the action execution module; and the action execution module is connected to the control module, and is configured to receive the instructions and cooperate with the control module to complete shading operations.
The sensor module includes a light sensor 1 and an image sensor 2; the light sensor 1 is installed at the interior and exterior of the solar greenhouse to monitor a light intensity at the interior and exterior of the solar greenhouse; and the image sensor 2 is installed at the interior 6505387 the solar greenhouse to monitor a crop growth situation in the solar greenhouse.
The control module includes a processor module 3, a power module 6, a driving module 4 and two roller shutter motors 5; the processor module 3 is connected to the sensor module, the power module 6, the driving module 4 and the two roller shutter motors 5, and is configured to make the decision based on the light intensity and the crop growth situation collected by the sensor module, and then convert the decision into an action signal may be recognized by the driving module 4; the power module 6 is connected to and powers the processor module 3, the driving module 4 and the two roller shutter motors 5; the driving module 4 is connected to the processor module 3 and the two roller shutter motors 5, and is configured to receive the action signal sent by the processor module 3 and drive the two roller shutter motors 5 to complete rotation; and the two roller shutter motors 5 are installed at a top and a bottom of the solar greenhouse, electrically connected to the driving module 3 and mechanically connected to the action execution module, and are configured to drive the action execution module to act so as to complete a shading task.
The action execution module includes a shading net above a greenhouse film 14, an upper reel 7, a reel supporting frame 12 and a lower reel 8. The shading net above the greenhouse film 14 includes a shading net I 9, a shading net II 10 and three ropes 11, specifically, the shading net
I 9 and the shading net II 10 have different shading rates but the same size, one end of the shading net I 9 is connected to the upper reel 7 and the other end is connected to the shading net
II 10, and one end of the shading net II 10 is connected to the shading net I 9 and the other end is connected to the three ropes 11; the three ropes 11 are equal in length, one ends of the three ropes 11 are connected to the shading net II 10 and the other ends are connected to the lower reel 8; the upper reel 7 is arranged on the reel supporting frame 12, one end of the upper reel 7 is connected to the top roller shutter motor 5, and a surface of the upper reel 7 is connected to one end of the shading net I 9 so as to drive the shading net I 9 to move by rotation of the upper reel 7; the reel supporting frame 12 is installed at a rear upper part, where a thermal insulation quilt 13 is completely rolled up, of the top of the solar greenhouse and has a certain height, supports the upper reel 7 without limiting the rotation of the upper reel 7, and is configured to separate the shading net above the greenhouse film 14 from the thermal insulation quilt 13 to prevent mutual interference therebetween during working; and a surface of the lower reel 8 is connected to the three ropes 11, so as to drive the three ropes 11 to move by rotation of the lower reel 8, and one end of the lower reel 8 is connected to the bottom roller shutter motor 5.
The present invention provides a control method with an adjustable shading rate in a solar greenhouse, and the method includes the following steps:
S1. device operation: the upper reel 7, the lower reel 8 and the two roller shutter motors:$4/505387 rotate together to realize opening or closing of the shading net above the greenhouse film 14; the top roller shutter motor 5 connected to the upper reel rotates forward to drive the upper reel 7 to rotate clockwise, and then the shading net above the greenhouse film 14 is driven to roll up, and at the same time, the bottom roller shutter motor 5 connected to the lower reel 8 rotates forward to drive the lower reel 8 to rotate clockwise, and then a part of the shading net above the greenhouse film 14, wound on the lower reel 8, is released and driven to roll up, and when the two roller shutter motors 5 stop, the whole shading net above the greenhouse film 14 stops moving; and the bottom roller shutter motor 5 connected to the lower reel 8 rotates backward to drive the lower reel 8 to rotate counterclockwise, and then the shading net above the greenhouse film 14 is driven to roll down, and at the same time, the top roller shutter motor 5 connected to the upper reel 7 rotates backward to drive the upper reel 7 to rotate counterclockwise, and then a part of the shading net above the greenhouse film 14, wound on the upper reel 7, is released and driven to roll down, and when the two roller shutter motors 5 stop, the whole shading net above the greenhouse film 14 stops moving;
S2. adjustment of an effective shading rate of the shading net above the greenhouse film 14: the shading net above the greenhouse film 14 consists of three parts including the shading net I 9, the shading net II 10 and the three ropes 11, and the three parts may just completely cover the greenhouse film 14 alone; assuming that a shading rate of the shading net I is p1, the shading rate of the shading net II is p2, with p1> p2, then the three ropes wound on the greenhouse film 14 won't affect a light, i.e., the shading rate of the three ropes 11 is 0; and if a shading effect is required to be adjusted, that is, if an effective refractive index of the shading net above the greenhouse film 14 is required to be changed, the following methods are used:
S201. the shading net I 9 is partially wound on the upper reel 7, and the shading net II 10 and the three ropes 11 are completely wound on the lower reel 8, i.e., the shading net above the greenhouse film 14 is shown as the shading net I 9, and at this time, the effective shading rate of the shading net above the greenhouse film 14 meets p = pu;
S202. the shading net I 9 is partially wound on the upper reel 7, and the shading net II 10 is partially and the three ropes 11 are completely wound on the lower reel 8, i.e., the shading net above the greenhouse film 14 is shown in a combination mode of the shading net I 9 and the shading net II 10, and at this time, the effective shading rate of the shading net above the greenhouse film 14 meets p2< p < pi;
S203. the shading net I 9 is completely wound on the upper reel 7, and the three ropes 11 are completely wound on the lower reel 8, i.e., the shading net above the greenhouse film 14 is shown as the shading net II, and at this time, the effective shading rate of the shading net aboté/505387 the greenhouse film 14 meets p=p2;
S204. the shading net I 9 is completely and the shading net II 10 is partially wound on the upper reel 7, and the three ropes 11 are partially wound on the lower reel 8, i.e, the shading net above the greenhouse film 14 is shown in the combination mode of the shading net II 10 and the three ropes 11, and at this time, the effective shading rate of the shading net above the greenhouse film 14 meets 0 <p < pz; and
S205. the shading net I 9 and the shading net II 10 are completely wound on the upper reel 7, and the three ropes 11 are partially wound on the lower reel 8, i.e., there are only the three ropes 11 on the shading net above the greenhouse film 14, and at this time, the effective shading rate of the shading net above the greenhouse film 14 meets p=0; and therefore, a dynamic adjustment range of the shading rate of the shading net above the greenhouse film 14 is 0 <p < p1; and
S3. shading adjustment strategy: if an indoor light intensity and an outdoor light intensity are L' and L respectively, L'1 is the indoor light intensity reaching a crop saturation light intensity point, Li is the outdoor light intensity corresponding to the indoor light intensity reaching the crop saturation light intensity point, AL1 and AL2 are smaller and larger outdoor light intensity thresholds, and AL'1 and AL" are smaller and larger indoor light intensity thresholds;
S301. determination of L'i: the saturation light intensity points are different in different crop growth periods, so a crop growth image is monitored, and a crop growth period is analyzed and judged using an image processing technology, so as to determine the saturation light intensity points of crops in the current growth period;
S302. if L < L1, when the indoor light intensity is low without reaching the saturation light intensity points of the crops, the shading net above the greenhouse film 14 is shown in a mode of
S2-S205 so as to ensure sufficient light in the greenhouse;
S303. if L1 < L < Li + AL1, when the indoor light intensity reaches and exceeds the saturation light intensity points of the crops, and an exceeding value is within a smaller numerical range, the shading net above the greenhouse film is shown in a mode of S2-S204; if L' > L'i+ AL'1, when the three ropes and the shading net II stop after moving down by a length Al, the effective shading rate of the greenhouse film increases and the indoor light intensity decreases; and if L' <L'1- AL'1, when the shading net II 10 and the three ropes 11 stop after moving up by the length Al, the effective shading rate of the greenhouse film 14 decreases and the indoor light intensity increases;
$304. if L = L1+ ALI, the shading net above the greenhouse film 14 is shown in a mode bP505387
S2-S203;
S305. if Li+ AL1< L < Li + AL2, when the indoor light intensity exceeds the saturation light intensity points of the crops, and the exceeding value is within a larger numerical range, the shading net above the greenhouse film 14 1s shown in a mode of S2-S202; if L' > L'1+ AL'2, when the shading net IT 10 and the shading net I 9 stop after moving down by the length Al, the effective shading rate of the greenhouse film 14 increases and the indoor light intensity decreases; and if L' <L'i - AL'2, when the shading net I 9 and the shading net II 10 stop after moving up by the length Al, the effective shading rate of the greenhouse film 14 decreases and the indoor light intensity increases; and
S306. if L > L1+ AL2, when the light intensity is very strong, the shading net II 10 and the three ropes 11 are completely wound on the lower reel 8, and the shading net above the greenhouse film 14 is in a mode of S2-S201, so as to shade strong light.
The above are only the specific embodiments of the application, but the protection scope of the application is not limited to the above. Any changes or substitutions, easily thought by the skilled in the art within the technical scope disclosed in the application, are included within the protection scope of the application. Therefore, the protection scope of the application is based on the protection scope of the claims.

Claims (5)

CLAIMS LU505387
1. À control system with an adjustable shading rate in a solar greenhouse, comprising a sensor module, a control module and an action execution module, wherein the sensor module is connected to the control module, and is configured to detect meteorological data and crop growth data at an interior and an exterior of the solar greenhouse; the control module is connected to the sensor module and the action execution module, and is configured to make a decision based on the meteorological data and crop growth data detected by the sensor module and then send instructions to the action execution module; and the action execution module is connected to the control module, and is configured to receive the instructions and cooperate with the control module to complete shading operations.
2. The control system with an adjustable shading rate in a solar greenhouse according to claim 1, wherein the sensor module comprises a light sensor and an image sensor; the light sensor 1s installed at the interior and exterior of the solar greenhouse to monitor a light intensity at the interior and exterior of the solar greenhouse; and the image sensor is installed at the interior of the solar greenhouse to monitor a crop growth situation in the solar greenhouse.
3. The control system with an adjustable shading rate in a solar greenhouse according to claim 1, wherein the control module comprises a processor module, a power module, a driving module and two roller shutter motors; the processor module is connected to the sensor module, the power module, the driving module and the two roller shutter motors, and is configured to make the decision based on the light intensity and the crop growth situation collected by the sensor module, and then convert the decision into an action signal may be recognized by the driving module; the power module is connected to and powers the processor module, the driving module and the two roller shutter motors; the driving module is connected to the processor module and the two roller shutter motors, and is configured to receive the action signal sent by the processor module and drive the two roller shutter motors to complete rotation; and the two roller shutter motors are installed at a top and a bottom of the solar greenhouse, electrically connected to the driving module and mechanically connected to the action execution module, and are configured to drive the action execution module to act so as to complete a shading task.
4. The control system with an adjustable shading rate in a solar greenhouse according to claim 1, wherein the action execution module comprises a shading net above a greenhouse film, an upper reel, a reel supporting frame and a lower reel; the shading net above the greenhouse film comprises a shading net I, a shading net II and three ropes, specifically, the shading net I and the shading net II have different shading rates but the same size, one end of the shading net I is connected to the upper reel and the other end is connected to the shading net II, and one end 68505387 the shading net II is connected to the shading net I and the other end is connected to the three ropes, and the three ropes are equal in length, one ends of the three ropes are connected to the shading net II and the other ends are connected to the lower reel; the upper reel is arranged on the reel supporting frame, one end of the upper reel is connected to the top roller shutter motor, and a surface of the upper reel is connected to one end of the shading net I so as to drive the shading net I to move by rotation of the upper reel; the reel supporting frame is installed at a rear upper part, where a thermal insulation quilt is completely rolled up, of the top of the solar greenhouse and has a certain height, supports the upper reel without limiting the rotation of the upper reel, and is configured to separate the shading net above the greenhouse film from the thermal insulation quilt to prevent mutual interference therebetween during working; and a surface of the lower reel is connected to the three ropes, so as to drive the three ropes to move by rotation of the lower reel, and one end of the lower reel is connected to the bottom roller shutter motor.
5. A control method with an adjustable shading rate in a solar greenhouse, wherein the method is used for the control system with an adjustable shading rate in a solar greenhouse according to claim 1, and comprises the following steps:
S1. device operation: the upper reel, the lower reel and the two roller shutter motors rotate together to realize opening or closing of the shading net above the greenhouse film; the top roller shutter motor connected to the upper reel rotates forward to drive the upper reel to rotate clockwise, and then the shading net above the greenhouse film is driven to roll up, and at the same time, the bottom roller shutter motor connected to the lower reel rotates forward to drive the lower reel to rotate clockwise, and then a part of the shading net above the greenhouse film, wound on the lower reel, is released and driven to roll up, and when the two roller shutter motors stop, the whole shading net above the greenhouse film stops moving; and the bottom roller shutter motor connected to the lower reel rotates backward to drive the lower reel to rotate counterclockwise, and then the shading net above the greenhouse film is driven to roll down, and at the same time, the top roller shutter motor connected to the upper reel rotates backward to drive the upper reel to rotate counterclockwise, and then a part of the shading net above the greenhouse film, wound on the upper reel, is released and driven to roll down, and when the two roller shutter motors stop, the whole shading net above the greenhouse film stops moving;
S2. adjustment of an effective shading rate of the shading net above the greenhouse film: the shading net above the greenhouse film consists of three parts comprising the shading net I, the shading net II and the three ropes, and the three parts may just completely cover the greenhouse film alone; assuming that a shading rate of the shading net I is p1, the shading rate of the shading net II is p2, with p1 > p2, and the three ropes wound on the greenhouse film won#505387 affect a light, i.e., the shading rate of the three ropes is 0; and if a shading effect is required to be adjusted, that is, if an effective refractive index of the shading net above the greenhouse film is required to be changed, the following methods are used: S201. the shading net I is partially wound on the upper reel, and the shading net II and the three ropes are completely wound on the lower reel, 1.e., the shading net above the greenhouse film is shown as the shading net I, and at this time, the effective shading rate of the shading net above the greenhouse film meets p = pi; S202. the shading net I is partially wound on the upper reel, and the shading net II is partially and the three ropes are completely wound on the lower reel, i.e., the shading net above the greenhouse film is shown in a combination mode of the shading net I and the shading net II, and at this time, the effective shading rate of the shading net above the greenhouse film meets p2 <p<py S203. the shading net I is completely wound on the upper reel, and the three ropes completely are wound on the lower reel, i.e., the shading net above the greenhouse film is shown as the shading net II, and at this time, the effective shading rate of the shading net above the greenhouse film meets p = pz; S204. the shading net I is completely and the shading net IT is partially wound on the upper reel, and the three ropes are partially wound on the lower reel, i.e., the shading net above the greenhouse film is shown in the combination mode of the shading net II and the three ropes, and at this time, the effective shading rate of the shading net above the greenhouse film meets 0 <p < p2; and S205. the shading net I and the shading net II are completely wound on the upper reel and the three ropes are partially wound on the lower reel, 1.e., there are only the three ropes on the shading net above the greenhouse film, and at this time, the effective shading rate of the shading net above the greenhouse film meets p = 0; and therefore, a dynamic adjustment range of the shading rate of the shading net above the greenhouse film is 0 < p <p1; and
S3. shading adjustment strategy: if an indoor light intensity and an outdoor light intensity are L' and L respectively, L'1 is the indoor light intensity reaching a crop saturation light intensity point, Li is the outdoor light intensity corresponding to the indoor light intensity reaching the crop saturation light intensity point, AL1 and AL» are smaller and larger outdoor light intensity thresholds, and AL'ı and AL" are smaller and larger indoor light intensity thresholds;
S301. determining L'ı: the saturation light intensity points are different in different crdg/505387 growth periods, so monitoring a crop growth image, and analyzing and judging a crop growth period using an image processing technology, so as to determine the saturation light intensity points of crops in the current growth period;
S302. if L < Li, when the indoor light intensity is low without reaching the saturation light intensity points of the crops, the shading net above the greenhouse film is shown in a mode of S2-S205 so as to ensure sufficient light in the greenhouse;
S303. if L1 < L < Li + AL1, when the indoor light intensity reaches and exceeds the saturation light intensity points of the crops, and an exceeding value is within a smaller numerical range, the shading net above the greenhouse film is shown in a mode of S2-S204; if L' > L'i+ AL'1, when the three ropes and the shading net II stop after moving down by a length Al, the effective shading rate of the greenhouse film increases and the indoor light intensity decreases; and if L' < L'i- AL'1, when the shading net II and the three ropes stop after moving up by the length Al, the effective shading rate of the greenhouse film decreases and the indoor light intensity increases; S304. if L = Li + AL, the shading net above the greenhouse film is shown in a mode of S2-S203; S305. if Li+ AL1< L < Li + AL2, when the indoor light intensity exceeds the saturation light intensity points of the crops, and the exceeding value is within a larger numerical range, the shading net above the greenhouse film 1s shown in a mode of S2-S202; if L' > L'i+ AL'2, when the shading net II and the shading net I stop after moving down by the length Al, the effective shading rate of the greenhouse film increases and the indoor light intensity decreases; and if L'< L'1i- AL"2, when the shading net I and the shading net II stop after moving up by the length Al, the effective shading rate of the greenhouse film decreases and the indoor light intensity increases; and S306. if L > Li+ AL», when the light intensity is very strong, and the shading net II and the three ropes are completely wound on the lower reel, the shading net above the greenhouse film is in a mode of S2-S201, so as to shade strong light.
LU505387A 2023-05-30 2023-10-27 Control system and method with adjustable shading rate in solar greenhouse LU505387B1 (en)

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CN202310624232.3A CN116627056A (en) 2023-05-30 2023-05-30 Solar greenhouse sunshade rate adjustable control system and method

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