CN105676922B - A kind of greenhouse optimising and adjustment method - Google Patents
A kind of greenhouse optimising and adjustment method Download PDFInfo
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- CN105676922B CN105676922B CN201610056861.0A CN201610056861A CN105676922B CN 105676922 B CN105676922 B CN 105676922B CN 201610056861 A CN201610056861 A CN 201610056861A CN 105676922 B CN105676922 B CN 105676922B
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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Abstract
A kind of greenhouse optimising and adjustment method, is related to temperature control or regulating system.The greenhouse optimising and adjustment method, the relational expression of plant growth speed and envirment factor is drawn using crop growth model, using the optimum temperature value under the intensity of illumination of determination come instead of the substantially setting value of traditional approach empirically.Set up the cost that regulation and control cost model obtains adjusting device operation.It is theoretical according to accumulated temperature, the desired temperature of one day is divided into three phases, instead of traditional two kinds of temperature setting methods day and night.On illumination stronger daytime, with photosynthetic principle of optimality set temperature value；It is relatively low after midnight in temperature, with Optimum cost set temperature value；Accumulated temperature compensation is carried out in moderate temperature cost of compensation relatively low before midnight.This method had both met the optimal required temperature value of crop photosynthesis, there is relatively low accumulated temperature cost of compensation again, and benefit is preferable.
Description
Technical field
The present invention relates to temperature control or regulating system, more particularly to a kind of greenhouse optimising and adjustment method.
Background technology
During traditional hothouse production, the setting of greenhouse environment factor substantially empirically, by observing different weather
Situation and plant growth situation draw the control environment of plant growth, and unsuitable plant growth upper and lower limit temperature.It is this
The mode that greenhouse is adjusted by experience, although operation can be said to be good, from benefit for, it is not satisfactory, have
Very big room for improvement.
The content of the invention
The defect existed for prior art, it is an object of the invention to provide a kind of greenhouse optimising and adjustment method, it is used
Conveniently, the operating cost of existing regulation and control can effectively be reduced.
The technical solution adopted in the present invention is：A kind of greenhouse optimising and adjustment method, it is characterised in that：Including following step
Suddenly：
According to the classification of the plant of plantation, the lower limit of the limiting temperature of preset plant growth corresponding with the plant and upper
Limit value；
In the case where meeting the limiting temperature of above-mentioned plant growth, three will be divided into the adjustment of greenhouse temperature in one day
Stage, the first stage is illumination stronger daytime, with light and optimal reconciles warm indoor temperature for principle；Second stage be temperature compared with
It is low after midnight, warm indoor temperature is adjusted by principle of Optimum cost；It it is before midnight in the phase III, using accumulated temperature compensation as principle
The warm indoor temperature of regulation.
It is described with light and optimal the step of reconcile warm indoor temperature for principle, specifically include：
Obtain the light and action function of plant；
The temperature and intensity of illumination when light and most fast speed are obtained according to above-mentioned function, the temperature and intensity of illumination are plant
The optimum condition of growth conditions, said temperature value is used as first stage desired temperature；
Warm indoor environment temperature is adjusted, make warm indoor temperature more than the lower limit of limiting temperature, higher limit with
Fluctuated within the upper and lower deviation range for stating first stage desired temperature.
Described the step of regulation temperature indoor temperature, specifically includes by principle of Optimum cost：
Regulation and control cost model is initially set up, equipment regulation and control cost is obtained：
In formula, p is total regulation and control cost；For first kind switching mode executing agency operating cost, kiOutgoing mechanism shape
State, 0 represents to be not carried out state, and 1 represents execution state；For Equations of The Second Kind sustained executing agency operating cost, kiRepresent
Mechanism status, 0 represents to be not carried out state, and 1 represents execution state, t Equations of The Second Kind executing agency actual run time；
Again based on crop growth model function and regulation and control cost effect model function, regulation and control Benefit Model is set up：
In formula, RmaxFor Optimal Input output ratio；F (T, L) is photosynthetic function；T represents that L is represented, P is cost, and t is, t0
For；
Obtain the desired temperature of second stage：
Temperature value when the derivative value of photosynthetic function pair temperature is equal to the derivative value of temperature with regulation and control cost model is made
For desired temperature；
Warm indoor environment temperature is adjusted, make warm indoor temperature more than the lower limit of limiting temperature, higher limit with
Fluctuated within the upper and lower deviation range for stating second temperature setting value.
The step of accumulated temperature is compensated, specifically includes：
Obtain total accumulated temperature value that crop growth period needs；
According to total accumulated temperature value and it is expected that Time To Market calculate plant growth one day required for accumulated temperature value；
Obtain Indoor Temperature angle value：
The accumulated temperature value needed daily by crop, subtracts the accumulated temperature value that the photosynthetic optimal stage accumulated, the difference is the 3rd
The desired temperature in stage；
Warm indoor environment temperature is adjusted, make warm indoor temperature more than the lower limit of limiting temperature, higher limit with
Fluctuated within the upper and lower deviation range for stating phase III desired temperature.
Warm indoor environment temperature is adjusted, make warm indoor temperature more than the lower limit of limiting temperature, higher limit with
Under, the step of fluctuated within the deviation range of desired temperature, including following regulation：
The first situation：When winter ambient temperature is less than the lower limit of limiting temperature, greenhouse temperature is maintained in pole when night
When limiting more than temperature upper limit value, isothermal holding is carried out, internal-external heat exchange is reduced, when temperature is less than limiting temperature lower limit, entered
Row heats, and when heating-up temperature reaches the deviation range lower limit of desired temperature, firing equipment is out of service, with inside and outside
Heat exchange, indoor temperature can be slowly drop down to the lower limit of limiting temperature, and now firing equipment is again turned on, and temperature is maintained at pole
Limit within the lower limit of temperature and the deviation range lower limit of desired temperature, the operation of firing equipment interval；
Second of situation：When noon summer high temperature, intense light irradiation, temperature value is higher than plant growth ceiling temperature, is dropped
Temperature, makes temperature maintain within the higher limit of limiting temperature and the deviation range higher limit of desired temperature；
The third situation：When temperature is maintained in the range of the deviant of setting value, and ambient temperature is less than setting value, in room
When interior temperature is less than the deviation range lower limit of desired temperature, is heated, be heated to the deviation range upper limit of desired temperature
When, stop heating, due to internal-external heat exchange, when warm indoor temperature is slowly drop down to the deviation range lower limit of desired temperature again
Heated, room temperature is fluctuated in the deviation range of desired temperature, and mean temperature is setting value；When ambient temperature is higher than temperature
During the deviation range upper limit of setting value, cooling operation is aerated, temperature is stopped when being down to the deviation range lower limit of desired temperature
Only divulge information, temperature is aerated cooling operation again when slowly ging up to the deviation range upper limit of desired temperature.
Advantages of the present invention and beneficial effect are：The greenhouse optimising and adjustment method, crop is drawn using crop growth model
The relational expression of growth rate and envirment factor, using the optimum temperature value under the intensity of illumination of determination come instead of traditional approach foundation
The substantially setting value of experience.Set up the cost that regulation and control cost model obtains adjusting device operation.It is theoretical according to accumulated temperature, by one day
Desired temperature is divided into three phases, instead of traditional two kinds of temperature setting methods day and night.On illumination stronger daytime, with
Photosynthetic principle of optimality set temperature value；It is relatively low after midnight in temperature, with Optimum cost set temperature value；In moderate temperature compensation
Lower-cost before midnight carries out accumulated temperature compensation.This method had both met the optimal required temperature value of crop photosynthesis, had again relatively low
Accumulated temperature cost of compensation, benefit is preferable.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Other accompanying drawings.
Fig. 1 is optimising and adjustment method flow diagram in greenhouse of the present invention；
Fig. 2 is the temperature schematic diagram in greenhouse optimising and adjustment method each stage in one day of the present invention；
Fig. 3 is the present invention using the power consumption contrast schematic diagram after greenhouse optimising and adjustment method with traditional regulation and control method.
Embodiment
Below in conjunction with the accompanying drawings 1~3 and embodiment the present invention is elaborated, describe below only as demonstration and
Explain, any formal limitation is not made to the present invention.
The greenhouse optimising and adjustment method that the present embodiment is used, its flow is as shown in Figure 1.
Step S101, according to the classification of the plant of plantation, the limiting temperature of preset plant growth corresponding with the plant
Lower limit and higher limit.Greenhouse structure in the present embodiment is high 4.5 meters ridge, 2.5 meters of eaves height, wide 6.8 meters, 20 meters of length.Selection
Plant is cucumber.Cucumber is transplanted in greenhouse when being grown in nursery to 2 to 3 true pages, and transplanting time is in early April, 2014.It is yellow
Melon optimal temperature is 18 DEG C to 30 DEG C, and limiting temperature is 10 DEG C of lower limit, 40 DEG C of the upper limit, and whole growth cycle needs effective accumulated temperature
600 degree-days.
One day twenty four hours is divided into three sections by step S102, the present embodiment：First stage is：The photosynthetic optimal order on daytime
Section；Second stage is the Optimum cost stage of the time after midnight；Phase III is the temperature-compensating stage of before midnight, its each stage
Temperature is as shown in Figure 2.Each period meets following constraints：
For the first stage：The stage be the intensity of illumination stronger stage, this stage with crop photosynthesis it is optimal based on.
Same plant growth has a ceiling temperature, also crop can be made to receive damage more than this ceiling temperature.In noon in summer temperature
Using ceiling temperature as setting value when when higher more than ceiling temperature.This method to set up makes crop growth conditions preferably, benefit
Optimize, the temperature in photosynthetic optimal stage should meet following relational expression：
T1=min (t2,tupper)；tupperFor ceiling temperature；t2For photosynthesis optimal setting.
Wherein, the process that light and effect optimal setting are determined is as follows：
Plant growth derives from the accumulation of photosynthesis of plant, and photosynthesis of plant intensity ceases manner of breathing with plant growth environment
Close.The influence of the factor pair such as plant growth environment temperature, intensity of illumination, gas concentration lwevel photosynthetic rate is very big, wherein titanium dioxide
Concentration of carbon typically change is smaller and adjusts that difficulty is larger with cost, and temperature and intensity of illumination change greatly and adjust and be easier to, typically
Plant photosynthetic rate and the functional relation of temperature and intensity of illumination are set up by experiment, temperature can be drawn from light and action function
Degree, intensity of illumination are to photosynthetic influence degree.
The purpose for setting up warmhouse booth is exactly to make plant growth faster and better by manual adjustment greenhouse, traditional greenhouse
The regulation of production medium temperature chamber's envirment factor such as temperature etc. is adjusted by knowhow mostly, typically has a temperature
Upper and lower bound, then upgrowth situation is good between bound, and then being grown beyond bound to be affected, but specifically
Optimum temperature how much is only to temperature value, the foundation not determined, while the change of intensity of illumination, optimal temperature also will be with
With change.Clearly that traditional is not optimal greenhouse ring come the greenhouse environment factor setting value substantially determined by experience
Border factor setting value, be still significantly improved space.
Influence journey of the greenhouse environment factor (such as temperature, light intensity) to plant growth can be drawn by light and action function
Degree, obtains envirment factor value when light and most fast speed, the value is exactly the envirment factor setting value for making plant growth best, so that
Reference is provided for optimal greenhouse environment factor setting value.
In the present embodiment, crop growth model is based on crop physiology and ecology process, and whole model is in the form of differential
Represent：
In formula,For crop dynamic growth speed, kg (m-2·s)-1；α is dry transformation ratio；FgrTo make object light
The speed of action is closed, gr is English grow abbreviation.FgrIt can be expressed as：
Fgr=f (T, L)
In formula, f (T, L) photosynthesis function, is temperature T and intensity of illumination L quadratic function, general type is：
F (T, L)=aT2+bL2+cTL+dT+eL+f
In formula, a, b, c, d, e, f are light and function binomial coefficient.
The present embodiment is corresponded to, the functional relation between the photosynthetic rate and indoor temperature intensity of illumination of cucumber is：
F (T, L)=- 45.973+3.409T+2.919L-0.06422T2-0.09543L2+0.02451TL
T (DEG C), L (klx) span in formula：
Above-mentioned light and action function are a binary quadratic equations, ask bounding method to seek light by the function of many variables in calculus
The extreme point (T, L) during action function f (T, L) maximum is closed, temperature T, the intensity of illumination L of the extreme point are exactly the photosynthetic of requirement
Act on optimal setting t2。
For second stage：Plant growth has a lower limit temperature, and crop life is likely to result in less than this lower limit temperature
Damage in reason, especially when winter nights, outdoor temperature is than relatively low, less than the lower limit temperature of plant growth when most
Degree.The setting value of greenhouse temperature is lower closer to outdoor temperature cost, and the time after midnight does not have sunlight, photosynthesis physical and chemical reaction compared with
Weak, the sensitivity to temperature can also be reduced.This when, desired temperature was preferably set by economic benefit cost, was connect substantially
Nearly outdoor temperature setting value, but have to that lower limit temperature must be less than.This method to set up can make cost it is relatively low better results, into
This optimal phase temperature should meet following relational expression：
T2=max (t, tbase)
In formula, tbaseFor lower limit temperature；T is to make Economic Benefit Model RmaxMaximum temperature value.
Wherein, Economic Benefit Model R is mademaxThe acquisition process of maximum temperature value is as follows：
First, cost is calculated using regulation and control cost model：Environmental control of greenhouse equipment is divided by execution feature, can be divided into
Two categories below：The first kind is switching mode executing agency, such as skylight, roller shutter, sunshade net, thermal screen；Equations of The Second Kind is held for sustained
Row mechanism, such as exhaust blower, humidifier, heater etc..
For first kind executing agency, a kind of its execution time from state to another state is fixed, such as skylight
It is fixed from the time being opened to required for closing, the operating cost for this class executing agency can be expressed as：
pi=CeWiti
In formula, piFor executing agency i operating cost；CeThe unit price of the energy is consumed for executing agency i；WiFor executing agency i
The power of dynamical system；tiFor the time of executing agency i operations once；I is executing agency's numbering, i=1,2,3,4, generation respectively
Table skylight, roller shutter, sunshade net, thermal screen.
For Equations of The Second Kind sustained executing agency, its operating cost is proportional with its run time.
For exhaust blower and heater：
pi=CeWi
WiFor blower fan and electrically heated power.
In the actual regulation and control of greenhouse, often multiple mechanisms act on greenhouse simultaneously, then it is each that it, which regulates and controls totle drilling cost,
The linear superposition of individual equipment regulation and control cost：
In formula, p is total regulation and control cost；For first kind switching mode executing agency operating cost, kiOutgoing mechanism shape
State, 0 represents to be not carried out state, and 1 represents execution state；For Equations of The Second Kind sustained executing agency operating cost, kiRepresent
Mechanism status, 0 represents to be not carried out state, and 1 represents execution state, t Equations of The Second Kind executing agency actual run time.
The operation energy consumption of greenhouse adjusting device is the key factor for needing to consider, to optimize the benefit of hothouse production,
Have to the cost of quantitative computing device operation.Depending on the cost of switching mode equipment operation once is substantially with energy value, electric energy
Price is substantially substantially constant at present, and this kind equipment is relatively good to be calculated, and can calculate cost in due order substantially.Equations of The Second Kind continuous service
Equipment is mainly temperature equipment, depending on its run time is with ambient temperature and the difference of temperature settings.Between running status is
Having a rest, for a period of time, the operation duration or operating cost in a period of time are related to the temperature difference, by temperature for continuous service after a period of time
Setting value is spent to determine.
Secondly, economic benefit is optimized using Economic Benefit Model.
When being controlled to greenhouse, the suitable environment of plant growth is not only considered, it is also contemplated that reaching optimal production
Go out the input cost of environment.Based on crop growth model function and regulation and control cost effect model function, regulation and control benefit is set up
Model is as follows：
In formula, RmaxFor Optimal Input output ratio；F (T, L) is light and action function；P is cost.
Envirment factor setting value determines the speed of growth of crop, and this point is determined by crop growth model theory, together
When setting value again it is related to regulation and control cost.Envirment factor setting value had not only influenceed the speed of growth but also had influenceed production cost, was taking setting
The consideration for the these two aspects that will compromise during value, makes benefit more optimize.
Photosynthesis function f (T, L) is the function of temperature, and temperature can be obtained to intensity of photosynthesis by function derivation
Influence degree.Regulation and control cost function in P (t) unit interval, with desired temperature and outdoor temperature difference positive correlation, the bigger function of difference
Value is higher, is the function of temperature.When ambient temperature value and inconsistent most preferably photosynthetic temperature value, the close optimal photosynthetic temperature of temperature value
Then the strong regulation and control cost of photosynthesis is high for angle value, and then the low intensity of photosynthesis of regulation and control cost is low close to ambient temperature value for temperature value.When
Temperature value of the derivative value of photosynthetic function pair temperature with cost function when equal to the derivative value of temperature can consider to balance
The preferable desired temperature t of benefit of intensity of photosynthesis and cost.
For the phase III：Died down in the stage illumination, crop photosynthesis dies down.It is theoretical according to the accumulated temperature of crop, make
Thing growth period will have certain accumulated temperature (warm degree-day), what this value was to determine, and when daily accumulated temperature is less, growth period just becomes
Long, when accumulated temperature is more, growth period shortens.The phase temperature is higher than temperature after midnight, and accumulated temperature compensation, regulation are carried out in the stage
Crop cycle, cost is relatively low, benefit can be made more to optimize.The temperature in temperature-compensating stage should meet following relational expression：
In formula, A3The accumulated temperature for needing to compensate for the stage.
Total accumulated temperature value is needed and it is expected that Time To Market can draw the accumulated temperature value needed for one day by crop, subtract it is photosynthetic most
The accumulated temperature value that the excellent stage has accumulated, is exactly the accumulated temperature value A needed for the stage3, the phase temperature can just be calculated according to above formula
Arranges value.
Above-mentioned daytime, the first half of the night, can voluntarily it be carried out according to sunshine-duration of particular geographic location, intensity of illumination after midnight
Set.
The present embodiment uses method of controlling switch, what greenhouse environment factor parameter was optimized by passing through forward part optimization method
Setting value (T1,T2,T3), higher limit and the lower limit composition of downward shift value (1 DEG C or 0.5 DEG C) and limiting temperature.Adjust in greenhouse
Control equipment must have enough abilities of regulation and control the envirment factors such as temperature is maintained near setting value.In winter nights ambient temperature
When relatively low, warming-up device and thermal screen have enough abilities temperature is maintained more than low cutoff value, same noon summer light
According to it is stronger when, aeration-cooling equipment and sunshade net have enough abilities temperature is maintained below upper limit cutoff.
The present embodiment typical case's regulation and control scene has three kinds.The first is：Winter ambient temperature is less than lower limit temperature, in night dimension
Temperature is held more than lower limit temperature cutoff, thermal screen is opened during this time, reduce internal-external heat exchange, when temperature is less than the limit
During temperature upper limit value, firing equipment is opened, when being heated to the lower limit of deviation range of desired temperature, and firing equipment stops,
With internal-external heat exchange, indoor temperature can be slowly drop down to the lower limit of limiting temperature, and now firing equipment is again turned on, temperature
It is maintained between the up to deviant of the lower limit temperature of limiting temperature, the operation of firing equipment interval.It is for second：Noon summer is strong
During illumination high temperature, temperature value is higher than the higher limit of plant growth limiting temperature, and now ante-venna is opened, and ventilation blower opens ventilation drop
Temperature, makes temperature maintain within the upper limit of the higher limit of limiting temperature and the deviation range of desired temperature.The third is：Temperature
Maintain in the deviation range of desired temperature, when ambient temperature is less than setting value, be less than the skew of desired temperature in temperature
During the lower limit of scope, warming-up device is opened, when being heated to setting value plus deviant, and warming-up device stops, because inside and outside heat is handed over
Change, warming-up device is again started up when room temperature is slowly drop down to the lower limit of the deviation range of desired temperature, and room temperature is set in temperature
Change up and down in the deviation range of definite value, mean temperature is setting value.Ambient temperature is higher than the deviation range of desired temperature
During higher limit, ventilation blower opens aeration-cooling, and ventilation blower is closed during the lower limit for the deviation range for being down to desired temperature, and temperature is delayed
It is again turned on when ging up slowly to the upper limit of the deviation range of desired temperature.
This control methods are simple, and adjusting device is that simple switch type equipment is cheaply practical, the regulation and control in greenhouse now
Equipment is mostly this equipment, can transform and reuse.
The greenhouse optimising and adjustment method that the present embodiment mode is used is compared as follows with tradition regulation and control：
Traditional mode is with ten weeks power consumption of optimization model to such as accompanying drawing 3.2916 degree of traditional mode power consumption, optimizes mould
2715 degree of formula power consumption, optimization model integrally lacks 201 degree of power consumption, saves 6.89% power consumption.The all power consumptions of contrast are found：
In first five week, both of which week, power consumption was essentially identical there is difference, the 6th week to the tenth week power consumption gap since the 6th week
For：10th, 26,35,54,72 degree.Ambient temperature curve is with setting temperature curve, preceding surrounding ambient temperature curve during comparative observation
It is below tradition and temperature curve is set, is pure warm up mode；There is within 5th week the highest temperature on one day freakish weather (May 1) to reach
28 DEG C, temperature is higher than setting value, and aeration-cooling, Optimizing Mode desired temperature change with intensity of illumination enhancing occurs in traditional mode
It is big to be higher than 28 DEG C, do not cool；6th week to the tenth week night temperature section, the traditional mode aeration-cooling time gradually lengthens, the rank
Section ambient temperature curve ambient temperature occurs when entering warm pattern at nightfall at 19 points causes traditional mode to occur higher than night temperature arranges value
Aeration-cooling, optimization model never occurs；(30 DEG C of the highest temperature on May 28) traditional mode starts daytime persistently occur within 8th week
Aeration-cooling, optimization model is aeration-cooling in appearance on May 30 (35 DEG C of highest), and ventilation time is shorter than traditional mode.
Bloom and bear fruit to the tenth weekend since the 5th weekend, harvested successively with same standard, count 100 plants of yield, pass
System pattern harvests 429.8 kilograms, and 436.2 kilograms of optimization model harvest, many 6.4 kilograms of harvests, year-on-year many receipts 1.49% are optimal
Change pattern has slight advantages.By observing contrast, Optimizing Mode is also more satisfactory in terms of the energy is saved, and has one in terms of volume increase
Determine advantage.
Fixed temperature setting value in traditional control method is not optimal temperature value in photosynthesis of plant, photosynthetic
Action effective benefit is less than Optimizing Mode.The degree of fitting of Optimizing Mode temperature value curve and ambient temperature curve is better than traditional mode,
Temperature has good followability to external world, and regulation and control cost is less, the ventilation drop of five weeks Optimizing Modes after this is explained in experiment
The warm time is less than traditional mode.
Although the foregoing describing the embodiment of the present invention, those skilled in the art in the art should manage
Solution, these are merely illustrative of, and can make various changes or modifications to these embodiments, without departing from the principle of the present invention
And essence.The scope of the present invention is only limited by the claims that follow.
Claims (3)
1. a kind of greenhouse optimising and adjustment method, comprises the following steps：
According to the classification of the plant of plantation, the lower limit and the upper limit of the limiting temperature of preset plant growth corresponding with the plant
Value；
In the case where meeting the limiting temperature of above-mentioned plant growth, three ranks will be divided into the adjustment of greenhouse temperature in one day
Section, the first stage is illumination stronger daytime, with light and optimal reconciles warm indoor temperature for principle；Second stage is that temperature is relatively low
After midnight, warm indoor temperature is adjusted by principle of Optimum cost；It is before midnight in the phase III, is adjusted by principle of accumulated temperature compensation
The warm indoor temperature of section；
It is described with light and optimal the step of reconcile warm indoor temperature for principle, specifically include：
Obtain the light and action function of plant；
The temperature and intensity of illumination when light and most fast speed are obtained according to above-mentioned function, the temperature and intensity of illumination are plant growth
The optimum condition of state, said temperature value is used as first stage desired temperature；
Warm indoor environment temperature is adjusted, makes warm indoor temperature more than the lower limit of limiting temperature, higher limit is with upper and lower
State and fluctuated within the deviation range of first stage desired temperature；
Described the step of regulation temperature indoor temperature, specifically includes by principle of Optimum cost：
Regulation and control cost model is initially set up, equipment regulation and control cost is obtained：
In formula, p is total regulation and control cost；For first kind switching mode executing agency operating cost, kiOutgoing mechanism state, 0 table
Show the state of being not carried out, 1 represents execution state, piFor executing agency i operating cost；Machine is performed for Equations of The Second Kind sustained
Structure operating cost, kiOutgoing mechanism state, 0 represents to be not carried out state, and 1 represents execution state, the actual fortune of t Equations of The Second Kind executing agency
The row time；
Again based on crop growth model function and regulation and control cost effect model function, regulation and control Benefit Model is set up：
In formula, RmaxFor Optimal Input output ratio；F (T, L) is photosynthetic function；T represents temperature, and L represents intensity of illumination, and P is into
Originally, between at the beginning of t is after midnight, t0For the end time after midnight；
Obtain the desired temperature of second stage：
Temperature value when the derivative value of photosynthetic function pair temperature is equal to the derivative value of temperature with regulation and control cost model is used as temperature
Spend setting value；
Warm indoor environment temperature is adjusted, makes warm indoor temperature more than the lower limit of limiting temperature, higher limit is with upper and lower
State and fluctuated within the deviation range of second temperature setting value.
2. optimising and adjustment method in greenhouse as claimed in claim 1, it is characterised in that：The step of accumulated temperature is compensated, specifically includes：
Obtain total accumulated temperature value that crop growth period needs；
According to total accumulated temperature value and it is expected that Time To Market calculate plant growth one day required for accumulated temperature value；
Obtain Indoor Temperature angle value：
The accumulated temperature value needed daily by crop, subtracts the accumulated temperature value that the photosynthetic optimal stage accumulated, the difference is the phase III
Desired temperature；
Warm indoor environment temperature is adjusted, makes warm indoor temperature more than the lower limit of limiting temperature, higher limit is with upper and lower
State and fluctuated within the deviation range of phase III desired temperature.
3. the greenhouse optimising and adjustment method as described in claim 1~2 any claim, it is characterised in that：To greenhouse inner ring
Border temperature is adjusted, and makes warm indoor temperature more than the lower limit of limiting temperature, below higher limit, the skew of desired temperature
The step of being fluctuated within scope, including following regulation：
The first situation：When winter ambient temperature is less than the lower limit of limiting temperature, greenhouse temperature is maintained in limit temperature when night
When spending more than lower limit, isothermal holding is carried out, internal-external heat exchange is reduced, when temperature is less than limiting temperature lower limit, is added
Heat treatment, when heating-up temperature reaches the deviation range lower limit of desired temperature, firing equipment is out of service, as inside and outside heat is handed over
Change, indoor temperature can be slowly drop down to the lower limit of limiting temperature, now firing equipment is again turned on, temperature is maintained at limit temperature
Within the lower limit of degree and the deviation range lower limit of desired temperature, the operation of firing equipment interval；
Second of situation：When noon summer high temperature, intense light irradiation, temperature value is higher than plant growth ceiling temperature, is cooled, made
Temperature is maintained within the higher limit of limiting temperature and the deviation range higher limit of desired temperature；
The third situation：It is warm indoors when temperature is maintained in the range of the deviant of setting value, and ambient temperature is less than setting value
When degree is less than the deviation range lower limit of desired temperature, is heated, when being heated to the deviation range upper limit of desired temperature, stopped
Only heat, due to internal-external heat exchange, warm indoor temperature is slowly drop down to carry out again during the deviation range lower limit of desired temperature
Heating, room temperature is fluctuated in the deviation range of desired temperature, and mean temperature is setting value；When ambient temperature is set higher than temperature
During the deviation range upper limit of value, cooling operation is aerated, temperature stops logical when being down to the deviation range lower limit of desired temperature
Wind, temperature is aerated cooling operation again when slowly ging up to the deviation range upper limit of desired temperature.
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| CN106951017B (en) * | 2017-05-10 | 2019-02-01 | 寿光市众恒唐韵信息科技有限公司 | The wisdom Greenhouse System of crop regulation-control model driving regulates and controls method |
| CN110045770A (en) * | 2019-03-08 | 2019-07-23 | 长沙星联电力自动化技术有限公司 | A kind of greenhouse facilities autocontrol method, device, equipment and storage medium |
| CN113190064B (en) * | 2021-04-12 | 2022-06-14 | 中国农业大学 | Optimal control method for light intensity of plant factory |
| CN113924925A (en) * | 2021-10-18 | 2022-01-14 | 上海沃尔农业科技有限公司 | Breeding method of storage-resistant pumpkin |
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