CN112753406A - Control system for automatically supplementing carbon dioxide and light by matching with plant photosynthesis - Google Patents
Control system for automatically supplementing carbon dioxide and light by matching with plant photosynthesis Download PDFInfo
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- CN112753406A CN112753406A CN201911069180.8A CN201911069180A CN112753406A CN 112753406 A CN112753406 A CN 112753406A CN 201911069180 A CN201911069180 A CN 201911069180A CN 112753406 A CN112753406 A CN 112753406A
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- 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
- A01G7/00—Botany in general
- A01G7/02—Treatment of plants with carbon dioxide
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- 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
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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- 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
- A01G7/00—Botany in general
- A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
- A01G7/045—Electric or magnetic or acoustic treatment of plants for promoting growth with electric lighting
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- 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
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
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Abstract
The invention provides a control system for automatically supplementing carbon dioxide and light rays in coordination with plant photosynthesis, which comprises a carbon dioxide concentration detector, a photosynthesis degree analysis module and a plant cultivation environment regulation and control module. The carbon dioxide concentration detector detects the carbon dioxide concentration of the planting environment to generate a carbon dioxide concentration value. The photosynthesis degree analysis module comprises a carbon dioxide concentration change analysis unit and a plant state judgment unit. The carbon dioxide concentration variation analysis unit analyzes the concentration variation of the carbon dioxide concentration value in a plurality of analysis time intervals during the detection period, so as to respectively generate a concentration variation rate corresponding to each analysis time interval. The plant state judging unit drives the plant environment regulating and controlling module to supplement or stop supplementing carbon dioxide and illumination according to a carbon dioxide critical concentration value and a carbon dioxide critical change rate.
Description
Technical Field
The present invention relates to a control system for automatically supplementing carbon dioxide and light in cooperation with photosynthesis of plants, and more particularly, to a control system for automatically supplementing carbon dioxide and light in cooperation with photosynthesis of plants, in which the timing of carbon dioxide supplementation is controlled by using the change in the concentration of carbon dioxide.
Background
Generally, the main components of the atmosphere are nitrogen and oxygen, and then carbon dioxide, however most animals need to inhale oxygen to support their life, the oxygen is mainly obtained by plants through photosynthesis of chlorophyll to convert carbon dioxide, and when plants produce oxygen through photosynthesis, they also combine into organic matters, so as to convert light energy into energy stored in the organic matters. It is known that the conditions affecting photosynthesis are mainly the amounts of carbon dioxide and light, that is, the concentration of carbon dioxide and the intensity of light.
As mentioned above, since most of the organic substances generated by photosynthesis of plants are starch converted from glucose, i.e. one of the food sources from which people depend on vitamins, researchers are working on how to increase the photosynthesis of plants to increase the amount of organic substances generated by plants in order to obtain a large amount of starch.
Referring to fig. 1, fig. 1 is a graph illustrating the variation of carbon dioxide concentration with time of day in the prior art. As shown in the figure, researchers found that when plants are planted in a closed environment, the measured carbon dioxide concentration in the closed environment is obviously reduced every day during the period from 10 o 'clock to 12 o' clock in the morning and from 15 o 'clock to 17 o' clock in the afternoon, so that the photosynthesis of the plants is judged to be periodic, and when the photosynthesis of the plants is not vigorous, even carbon dioxide is supplemented, only carbon dioxide is lost, so that resources are wasted, and even the whole natural environment is influenced to a greater or lesser extent.
As described above, since the degree of photosynthesis of plants depends mainly on the concentration of carbon dioxide and the intensity of light, and the concentration of carbon dioxide in the natural environment does not change greatly, when a large amount of photosynthesis is desired for growth, the area and time of the plants exposed to the sun are mostly increased as much as possible, but researchers find that the plants are also in the vigorous period and non-vigorous period of photosynthesis, and therefore, even if the plants are planted in a closed environment such as a greenhouse, a room, or a planting box, and long-term light is provided, and a large amount of carbon dioxide is provided, the excessive light and carbon dioxide are only wasted when the plants are in the period in which the photosynthesis is not vigorous.
Disclosure of Invention
In view of the fact that in the prior art, in order to increase the degree of photosynthesis of plants, the prior art plants are planted in a closed space, and then a large amount of light and carbon dioxide are provided, researchers find that the photosynthesis of plants is limited by the intensity of light and the concentration of carbon dioxide, and the photosynthesis is divided into a photosynthesis vigorous period and a photosynthesis low-falling period due to the physiological cycle of the plants, so that when the plants are in the photosynthesis low-falling period, too much light and carbon dioxide are wasted; accordingly, the present invention is directed to a control system for automatically supplying carbon dioxide and light in coordination with photosynthesis of plants, which can accurately supply carbon dioxide and light during the period when the photosynthesis of plants is vigorous.
The invention aims to solve the problems in the prior art, and provides a control system for automatically supplementing carbon dioxide and light rays in cooperation with plant photosynthesis.
The carbon dioxide concentration detector is arranged in a planting environment where at least one plant is planted, and used for detecting the carbon dioxide concentration of the planting environment during a detection period to generate a carbon dioxide concentration value and sending a carbon dioxide concentration signal according to the carbon dioxide concentration value.
The photosynthesis degree analysis module comprises a carbon dioxide concentration change analysis unit and a plant state judgment unit. The carbon dioxide concentration variation analysis unit is electrically connected to the carbon dioxide concentration detector and used for receiving the carbon dioxide concentration signal and analyzing the concentration variation of the carbon dioxide concentration value in a plurality of analysis time intervals in the detection period so as to respectively generate a concentration variation rate corresponding to each analysis time interval. The plant state judging unit is electrically connected with the carbon dioxide concentration change analyzing unit, is provided with a carbon dioxide critical concentration value representing the exuberant photosynthesis and a carbon dioxide critical change rate representing the declining photosynthesis, and sends out a first planting demand signal when the carbon dioxide concentration value is lower than the carbon dioxide critical concentration value and a second planting demand signal when the carbon dioxide concentration change rate is higher than the carbon dioxide critical change rate.
The planting environment regulating module comprises a control unit, a carbon dioxide supply unit and an illumination unit. The control unit is in communication connection with the plant state judging unit and sends a carbon dioxide supplementing signal and an enhanced illumination signal when receiving the first planting demand signal, and the control unit further sends a carbon dioxide supplementing stopping signal and an enhanced illumination stopping signal when receiving the second planting demand signal. The carbon dioxide supply unit is electrically connected with the control unit and used for receiving the carbon dioxide supplement signal and the carbon dioxide supplement stop signal, supplying carbon dioxide to the planting environment when the carbon dioxide supplement signal is received, and stopping supplying the carbon dioxide to the planting environment when the carbon dioxide supplement stop signal is received. The illumination unit is electrically connected with the control unit and used for receiving the enhanced illumination signal and the enhanced illumination stopping signal, enhancing the illumination intensity of the planting environment when receiving the enhanced illumination signal, and stopping enhancing the illumination intensity of the planting environment when receiving the enhanced illumination stopping signal.
In an auxiliary technical means derived from the above-mentioned necessary technical means, the planting environment control module further comprises a fertilizer supply unit for supplying fertilizer to the planting environment, the control unit further sends a fertilizer supplement signal to the fertilizer supply unit when receiving the first planting demand signal, and the control unit further sends a fertilizer stop signal to the fertilizer supply unit when receiving the second planting demand signal.
In a subsidiary technical means derived from the above-mentioned essential technical means, the carbon dioxide supply unit replenishes the carbon dioxide to the planting environment at a constant replenishment rate when receiving the signal of replenishing the carbon dioxide, and the critical change rate of the carbon dioxide concentration is greater than or equal to the constant replenishment rate.
As described above, the control system for automatically supplementing carbon dioxide and light in coordination with plant photosynthesis of the present invention determines whether the plant enters the vigorous stage of photosynthesis through detection and analysis of carbon dioxide concentration, supplements carbon dioxide and light, and stops supplying carbon dioxide and light when determining that the photosynthesis of the plant enters the decay stage, thereby effectively increasing the photosynthesis level of the plant and effectively avoiding waste of resources such as carbon dioxide and light.
The present invention will be further described with reference to the following examples and accompanying drawings.
Drawings
FIG. 1 is a graph showing the time of day versus carbon dioxide concentration of the prior art;
FIG. 2 is a schematic diagram of a system for controlling the automatic carbon dioxide and light supplementation in conjunction with plant photosynthesis according to a preferred embodiment of the present invention;
FIG. 3 is a schematic plan view of a carbon dioxide sensor and a planting environment control module according to the present invention installed in a planting environment;
FIG. 4 is a schematic diagram illustrating a carbon dioxide concentration variation analysis unit for analyzing a carbon dioxide concentration according to a preferred embodiment of the present invention; and
fig. 5 is a schematic diagram of a system for transmitting a second planting request signal by the plant status determination unit according to the present invention.
The reference numbers illustrate:
100 control system for automatically supplementing carbon dioxide and light by matching with plant photosynthesis
1 carbon dioxide concentration detector
2 photosynthesis degree analysis module
21 carbon dioxide concentration change analysis unit
22 plant state judging unit
221 critical concentration value of carbon dioxide
Critical rate of change of 222 carbon dioxide concentration
3 plant and plant environment regulation and control module
31 control unit
32 carbon dioxide supply unit
321 carbon dioxide storage tank
322 carbon dioxide conveying pipeline
33 illumination unit
34 fertilizer supply unit
341 fertilizer storage tank
342 fertilizer delivery pipe
343 irrigation sprinkler
200 plants
300 planting box
301 planting box body
302 plant growing medium
PS planting environment
S1 carbon dioxide concentration signal
S2 first planting demand signal
S2a second planting demand signal
S3 carbon dioxide supplement signal
S3a stop carbon dioxide supplement signal
S4 enhanced illumination signal
S4a stopping enhancing the illumination signal
S5 Signal for replenishing Fertilizer
S5a stop supplementing fertilizer signal
Curves C1, C2, C3
Detailed Description
Referring to fig. 2, fig. 2 is a schematic diagram of a system for controlling automatic carbon dioxide and light supply in cooperation with plant photosynthesis according to a preferred embodiment of the present invention.
As shown in the figure, a control system 100 for automatically supplementing carbon dioxide and light in cooperation with photosynthesis of plants includes a carbon dioxide concentration detector 1, a photosynthesis degree analysis module 2, and a plant cultivation environment control module 3.
The carbon dioxide sensor 1 is disposed in a planting environment PS in which a plant 200 is planted, and is configured to detect a carbon dioxide concentration of the planting environment PS during a detection period to generate a carbon dioxide concentration value, and to send a carbon dioxide concentration signal S1 according to the carbon dioxide concentration value.
The photosynthesis degree analysis module 2 includes a carbon dioxide concentration variation analysis unit 21 and a plant state determination unit 22. The carbon dioxide concentration variation analyzing unit 21 is electrically connected to the carbon dioxide concentration detector 1, and is configured to receive the carbon dioxide concentration signal S1, and analyze the concentration variation of the carbon dioxide concentration value in a plurality of analysis time intervals during the detection period, so as to generate a concentration variation rate corresponding to each analysis time interval.
The plant status determining unit 22 is electrically connected to the carbon dioxide concentration variation analyzing unit 21, and has a carbon dioxide critical concentration value 221 representing the start of the photosynthesis and a carbon dioxide critical variation rate 222 representing the start of the photosynthesis, and sends a first planting demand signal S2 when the carbon dioxide concentration value is lower than the carbon dioxide critical concentration value 221, and sends a second planting demand signal S2a (shown in fig. 5) when the photosynthesis termination determination variation rate is higher than the carbon dioxide critical variation rate 222. In practice, the carbon dioxide concentration change analyzing unit 21 and the plant state determining unit 22 are programs written in a processor, for example.
The planting environment controlling module 3 includes a control unit 31, a carbon dioxide supply unit 32, an illumination unit 33, and a fertilizer supply unit 34. The control unit 31 is communicatively connected to the plant status determining unit 22 and sends a carbon dioxide supplement signal S3, an enhanced illumination signal S4 and a fertilizer supplement signal S5 when receiving the first planting demand signal S2, and the control unit 31 further sends a carbon dioxide supplement stop signal S3a (shown in fig. 5), an enhanced illumination stop signal S4a (shown in fig. 5) and a fertilizer supplement stop signal S5a (shown in fig. 5) when receiving the second planting demand signal S2 a.
The carbon dioxide supply unit 32 is electrically connected to the control unit 31 for receiving the carbon dioxide supplement signal S3 and the carbon dioxide supplement stop signal S3a, supplying carbon dioxide to the cultivation environment PS when receiving the carbon dioxide supplement signal S3, and stopping supplying carbon dioxide to the cultivation environment PS when receiving the carbon dioxide supplement stop signal S3 a.
The illumination unit 33 is electrically connected to the control unit 31, and is configured to receive the enhanced illumination signal S4 and the stop enhanced illumination signal S4a, and to enhance an illumination intensity of the cultivation environment PS when receiving the enhanced illumination signal S4, and to stop enhancing the illumination intensity of the cultivation environment PS when receiving the stop enhanced illumination signal S4 a.
The fertilizer supply unit 34 is electrically connected to the control unit 31, and is configured to receive the fertilizer supplement signal S5 and the fertilizer supplement stop signal S5a, supply fertilizer to the planting environment PS when receiving the fertilizer supplement signal S5, and stop supplementing fertilizer to the planting environment PS when receiving the fertilizer supplement stop signal S5 a.
Referring to fig. 3, fig. 3 is a schematic plan view illustrating a carbon dioxide sensor and a planting environment control module according to the present invention disposed in a planting environment. As shown, in the present embodiment, the planting environment PS is formed by a planting box 300, the planting box 300 includes a planting box body 301 and a planting medium 302, and the planting medium 302 is disposed in the planting box body 301 and is used for planting the plants 200 (only one is shown in the figure). In addition, in the embodiment, the carbon dioxide supply unit 32 further includes a carbon dioxide storage tank 321 and a carbon dioxide transmission pipeline 322, the carbon dioxide storage tank 321 is disposed on the planting box body 301 and stores carbon dioxide, and the carbon dioxide transmission pipeline 322 extends from the carbon dioxide storage tank 321 to the planting box body 301, so that the carbon dioxide storage tank 321 is communicated with the planting environment PS; the illumination unit 33 is disposed in the planting box body 301 for providing light to illuminate the plant 200; the fertilizer supply unit 34 further includes a fertilizer storage tank 341, a fertilizer delivery pipe 342 and an irrigation nozzle 343, the fertilizer storage tank 341 is disposed on the planting box body 301 and stores a fertilizer liquid, the fertilizer delivery pipe 342 extends from the fertilizer storage tank 341 to the planting box body 301 so as to connect the fertilizer storage tank 341 to the planting environment PS, and the irrigation nozzle 343 is disposed at the end of the fertilizer delivery pipe 342 so that the fertilizer liquid delivered by the fertilizer delivery pipe 342 can be sprayed to the planting environment PS through the irrigation nozzle 343.
Referring to fig. 2 to 5, fig. 4 is a schematic diagram illustrating a carbon dioxide concentration variation analysis unit analyzing a carbon dioxide concentration value according to a preferred embodiment of the invention; fig. 5 is a schematic diagram of a system for transmitting a second planting request signal by the plant status determination unit according to the present invention.
As shown in fig. 2 and 4, the curve C1 is a curve showing the change of carbon dioxide concentration when carbon dioxide in the planting environment PS is consumed by the plant 200 over time without additional carbon dioxide supply; curve C2 is a carbon dioxide concentration variation curve of carbon dioxide supplemented by the carbon dioxide supply unit 32; the curve C3 is a carbon dioxide concentration variation curve obtained by detecting carbon dioxide in the planting environment PS when the carbon dioxide supply unit 32 supplements carbon dioxide to the planting environment PS with the control of the first planting demand signal S2 and the second planting demand signal S2 a.
As mentioned above, since the carbon dioxide concentration variation analyzing unit 21 continuously receives the carbon dioxide concentration signal S1, the carbon dioxide concentration variation analyzing unit 21 analyzes the variation of the carbon dioxide concentration value with time, such as the curve C3 shown in fig. 4, the carbon dioxide critical concentration value 221 preset by the plant status determining unit 22 is y1 in the present embodiment, and the carbon dioxide critical variation rate 222 preset by the plant status determining unit 22 is 20ppm/min in the present embodiment, so that when the carbon dioxide concentration value gradually decreases from the initial concentration value represented by y0 to be lower than the y1 corresponding to the carbon dioxide critical concentration value 221, the plant status determining unit 22 sends the first planting demand signal S2, and the control unit 31 sends the carbon dioxide supplement signal S3, the illumination enhancement signal S4 and the fertilizer supplement signal S5 to the carbon dioxide supply unit 32, respectively, The illumination unit 33 and the fertilizer supply unit 34 are used to provide the plant 200 in the planting environment PS with enough material to perform vigorous photosynthesis.
However, as shown in fig. 4 and 5, since the carbon dioxide concentration variation analyzing unit 21 continuously analyzes the concentration variation of the carbon dioxide concentration value in a plurality of analysis time intervals during the detection period and generates the concentration variation rate for each analysis time interval, when the concentration variation rate is higher than the critical carbon dioxide concentration variation rate 222, the plant status determining unit 22 sends the second planting request signal S2a, and the control unit 31 accordingly sends the carbon dioxide replenishment stopping signal S3a, the illumination enhancement stopping signal S4a and the fertilizer replenishment stopping signal S5 a.
For example, as shown by curve C3 in fig. 4, in the present embodiment, when the carbon dioxide concentration value decreases from y3 to below y3 and then advances to time points such as x3, and x3 with time, the carbon dioxide concentration values are y3, and y3, respectively, and therefore the concentration change rate in the analysis time interval between x3 and x3 is (y3-y 3)/(x3-x 3), the concentration change rate in the analysis time interval between x3 and x3 is (y3-y 3)/(x3-x 3), for example, the analysis time interval between x3 and the analysis time interval between x3 and x3 are both 10 minutes, the concentration change difference between y3 and y3 is 100ppm, the concentration change rate between y3 and y3 is 300ppm, and therefore the analysis time interval between x3 and x3 is 30 min/300 ppm (x 3/300 ppm/10 ppm), however, since the critical change rate 222 of the carbon dioxide concentration preset by the plant status determination unit 22 of the embodiment is 20ppm/min, the change rate of the concentration in the analysis time interval of x2 and x3 is higher than the critical change rate 222 of the carbon dioxide concentration, and at this time, the plant status determination unit 22 sends the second planting request signal S2 a.
It should be noted that, as can be seen from the above description, when the carbon dioxide concentration value is decreased from y0 to y1 which is lower than the critical carbon dioxide concentration value 221, it represents that the photosynthesis of the plant 200 starts to be performed vigorously, so that the carbon dioxide supply unit 32, the illumination unit 33 and the fertilizer supply unit 34 are controlled to respectively supplement carbon dioxide, illumination and fertilizer at this time, so that more materials of the plant 200 can be effectively used for photosynthesis, and oxygen and organic matters are generated; in the embodiment, since the carbon dioxide supply unit 32 is used to supply carbon dioxide with a fixed replenishment rate, for example, 20ppm is consumed by the plant 200 per minute, and the carbon dioxide supply unit 32 is used to supply carbon dioxide with 15ppm per minute, when the rate of carbon dioxide consumption by the plant 200 is slow, the concentration value of carbon dioxide gradually increases, for example, the interval between x1 and x2 gradually increases at a rate of 10ppm per minute, however, when the carbon dioxide concentration variation analysis unit 21 analyzes that the concentration variation rate 30ppm/min of the analysis time interval between x2 and x3 exceeds 20ppm/min of the preset critical variation rate 222 of carbon dioxide concentration, it indicates that the photosynthesis of the plant 200 has started to deteriorate, and the plant status determination unit 22 sends the second planting demand signal S2a to control the carbon dioxide supply unit 32, the illumination unit 33 and the carbon dioxide supply unit 34 to stop supplying carbon dioxide fertilizer, Illumination and fertilizer. Different plants 200 correspond to respective critical change rates 222 of carbon dioxide concentration, and in practice, the change rate can be calculated by detecting the change curve of the carbon dioxide concentration of the plant 200.
In summary, the control system for automatically supplementing carbon dioxide and light in coordination with plant photosynthesis of the present invention mainly determines whether the plant enters the vigorous stage of photosynthesis through detection and analysis of carbon dioxide concentration, supplements carbon dioxide and light, and then stops supplying carbon dioxide and light when the photosynthesis of the plant enters the decay stage, so as to effectively increase the photosynthesis level of the plant and avoid wasting too much resources such as carbon dioxide and light.
The foregoing detailed description of the preferred embodiments is intended to more clearly illustrate the features and spirit of the present invention, and not to limit the scope of the invention by the preferred embodiments disclosed above. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the scope of the claims appended hereto.
Claims (3)
1. A control system for automatically supplementing carbon dioxide and light in conjunction with photosynthesis of a plant, comprising:
a carbon dioxide concentration detector, which is arranged in a planting environment in which at least one plant is planted, is used for detecting the carbon dioxide concentration of the planting environment during detection to generate a carbon dioxide concentration value and sending a carbon dioxide concentration signal according to the carbon dioxide concentration value; and
photosynthesis degree analysis module includes:
a carbon dioxide concentration variation analysis unit electrically connected to the carbon dioxide concentration detector for receiving the carbon dioxide concentration signal and analyzing the concentration variation of the carbon dioxide concentration value in a plurality of analysis time intervals during the detection period, so as to generate a concentration variation rate corresponding to each of the plurality of analysis time intervals respectively; and
a plant state determination unit electrically connected to the carbon dioxide concentration variation analysis unit, wherein the plant state determination unit is provided with a carbon dioxide critical concentration value representing that photosynthesis starts to be vigorous, and a carbon dioxide critical variation rate representing that photosynthesis starts to decline, and sends a first planting demand signal when the carbon dioxide concentration value is lower than the carbon dioxide critical concentration value, and sends a second planting demand signal when the concentration variation rate is higher than the carbon dioxide critical variation rate; and
plant and plant environmental conditioning module contains:
the control unit is in communication connection with the plant state judging unit and sends a carbon dioxide supplementing signal and an illumination enhancing signal when receiving the first planting demand signal, and the control unit further sends a carbon dioxide supplementing stopping signal and an illumination enhancing stopping signal when receiving the second planting demand signal;
a carbon dioxide supply unit electrically connected to the control unit for receiving the carbon dioxide supplement signal and the carbon dioxide supplement stop signal, supplying carbon dioxide to the planting environment when the carbon dioxide supplement signal is received, and stopping supplying the carbon dioxide to the planting environment when the carbon dioxide supplement stop signal is received; and
the illumination unit, the electrical property link in the control unit for receive the enhancement illumination signal with stop the enhancement illumination signal, and receive strengthen when the enhancement illumination signal plant the illumination intensity of planting the environment, and receive stop strengthening when stopping the enhancement illumination signal plant the environment the illumination intensity.
2. The system as claimed in claim 1, wherein the planting environment control module further comprises a fertilizer supply unit for supplying fertilizer to the planting environment, the control unit further sends a fertilizer supplement signal to the fertilizer supply unit when receiving the first planting demand signal, and the control unit further sends a fertilizer stop signal to the fertilizer supply unit when receiving the second planting demand signal.
3. The system for controlling plant photosynthesis to supplement carbon dioxide and light automatically according to claim 1, wherein the carbon dioxide supply unit supplements the carbon dioxide to the cultivation environment at a constant supplement rate when receiving the carbon dioxide supplement signal, and the critical change rate of the carbon dioxide concentration is greater than or equal to the constant supplement rate.
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| CN115443838A (en) * | 2022-10-11 | 2022-12-09 | 合肥创农生物科技有限公司 | Plant gas self-balancing system for indoor environment |
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Application publication date: 20210507 |