CN102077767B - Intelligent plant supplementary lighting method and device - Google Patents
Intelligent plant supplementary lighting method and device Download PDFInfo
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- CN102077767B CN102077767B CN2010105298146A CN201010529814A CN102077767B CN 102077767 B CN102077767 B CN 102077767B CN 2010105298146 A CN2010105298146 A CN 2010105298146A CN 201010529814 A CN201010529814 A CN 201010529814A CN 102077767 B CN102077767 B CN 102077767B
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Abstract
The invention relates to an intelligent plant supplementary lighting method. The method comprises the following steps: setting a red light threshold and a blue light threshold according to the demand of a plant on red light and blue light in each growth stage; detecting the intensities of the red light and the blue light in the growing environment of the plant; comparing the intensities with the corresponding red light threshold and blue light threshold to judge whether supplementary lighting is required and determine the accurate volume of the supplementary lighting; if the supplementary lighting is required, calculating the input current of a corresponding supplementary lighting set according to the volume of the supplementary lighting, so as to accurately control the intensity of the supplementary lighting set and realize intelligent and accurate supplementary lighting on demand, and if the supplementary lighting is not required, turning off the supplementary lighting set. The invention also provides a device realizing the method. By utilizing the supplementary lighting method and device in the invention, quantitative demand supplementary lighting by wavelength can be carried out on the plant according to the characteristics in different growth stage of the plant.
Description
Technical field
The invention belongs to the agricultural modernization field, relate to Artificial Control, be specifically related to a kind of method and apparatus of plant intelligent light filling growing process.
Background technology
Along with science and technology development, artificial light filling technology is suggested and obtains broad research and utilization.In plant light filling system in the past; The light filling light source mainly contains incandescent lamp, halogen tungsten lamp, high-pressure mercury fluorescent lamp, high-pressure mercury lamp etc.; These light source applications exist the unfavorable defective of Spectral matching in the plant light filling, light emitted white-light spectrum or wire spectral line, and what it can be by plant absorbing is the light of indivedual wave bands; The light of its all band then all is wasted, and is not energy-conservation; In addition, it is bigger that these light sources produce heats, can not the irradiation at short distance plant, and utility rate of luminous energy is low.
Existing LED light filling lamp heat to plant is lower, can send out physiological radiation effective can the wavelength band Spectral matching light wave preferably.But in effective physiological radiation can wave band, plant existed than big-difference the absorbing capacity of the light difference with wavelength, and existing LED light filling lamp wave-length coverage is wider, not the problem of optical energy utilization efficiency that taking into account system sends.Discover that simultaneously there is notable difference in different plant different phases to the requirement and the ratio of red blue two types of light; More and more plants preference temperature and the bright threshold information of subrane light requirement have stage by stage been obtained; But existing system still adopts traditional detection method, adopts subrane light intensity to detect and temperature detection based on this, so system's light filling accurate quantification light filling as required of also being unrealized; Cause light filling not enough with the light filling surplus this to contradiction and deposit, influence plant growing and optical energy utilization efficiency simultaneously.Adopt plant light filling system to adopt manually light filling, self-timing light filling and monitor three kinds of patterns of light filling automatically.Wherein preceding dual mode is easy to use, but because the influence of artificial experience and external environment, system flexibility difference and light filling effect differ greatly.The third pattern has adopted the pattern of the automatic light filling of automatic detection; But because existing system all adopts the mode of fixing red blue light light intensity and beam intensity ratio; Do not consider the difference of different plants at the required red blue light ratio of different phase, still there is certain problem in the accuracy of system's light filling.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art; The object of the present invention is to provide a kind of method and apparatus of plant intelligent light filling; It realizes dividing wavelength quantitative light filling as required to all kinds of plants according to the characteristics of plant different phase growth, is satisfying under its required prerequisite of growing; Farthest improve the availability of light energy output, reduce invalid energy consumption.
To achieve these goals, the technical scheme of the present invention's employing is:
A kind of method of plant intelligent light filling may further comprise the steps,
The first step, according in each vegetative stage of plant to the demand of red blue light, red, blue light threshold value is set;
Second step; Detect in the plant growth environment red, blue light is strong, through itself and corresponding red, judgement of blue light threshold ratio, if environment is red, blue light is by force less than set corresponding red, blue light threshold value; Then being judged as needs corresponding light filling; And needing the light filling amount is set red, blue light threshold value and that respective environment is red, blue light is strong is poor, if environment is red, blue light is greater than or equal to set corresponding red, blue light threshold value by force, then is judged as and need not light filling;
In the 3rd step,,, use corresponding light filling lamp group brightness and drive current linear relation curve then according to need light filling amount like the need light filling; Calculate the input current of corresponding light filling lamp group, according to PWM dutycycle and output current relation curve, calculate the PWM dutycycle again; Adjust the PWM dutycycle by single-chip microcomputer then, thereby accurately control the brightness of light filling lamp group, realize the accurate light filling of intelligence as required; As do not need light filling, then directly turn-off light filling lamp group or make light filling lamp group continue to keep off state, light filling EP (end of program).
When the said first step is provided with red, blue light threshold value; Also photosynthetic preference temperature scope is provided with temperature threshold in each vegetative stage according to plant; Said second step detect red, blue light in the plant growth environment strong before, detect the environmental temperature of plant growing earlier, when environmental temperature in set temperature threshold scope; Then carry out said second step and the 3rd step; When environmental temperature outside set temperature threshold scope, then directly turn-off light filling lamp group or make light filling lamp group continue keep off state, light filling EP (end of program).
Described light filling lamp group is a led array, adopts to comprise the blue-ray LED array that the red-light LED array LED little with comprising blue light absorption peak and half-wave zone scope that plant red light absorption peak and the little LED of half-wave zone scope form forms.
For realizing the method for described a kind of plant intelligent light filling, a kind of equipment of plant intelligent light filling is proposed, comprise,
Detection module is realized illumination detection and temperature detection;
Control module, the data that collect according to detection module, respectively with equipment established temperature threshold value and red, the strong threshold ratio of blue light; When environmental temperature outside set temperature threshold scope, then directly turn-off light filling lamp group or make light filling lamp group continue keep off state, when environmental temperature in set temperature threshold scope; Then detect in the plant growth environment red, blue light is strong, judge through itself and corresponding red, blue light threshold ratio, if environment is red, blue light is greater than or equal to set corresponding red, blue light threshold value by force; Then be judged as and need not light filling, if environment is red, blue light is by force less than set corresponding red, blue light threshold value, then being judged as needs corresponding light filling; And needing the light filling amount is set red, blue light threshold value and that respective environment is red, blue light is strong is poor, then according to need light filling amount, uses corresponding light filling lamp group brightness and drive current linear relation curve; Calculate the input current of corresponding light filling lamp group; According to PWM dutycycle and output current relation curve, calculate the PWM dutycycle again, then by single-chip microcomputer adjustment PWM dutycycle; Thereby accurately control the brightness of light filling lamp group, realize the accurate light filling of intelligence as required;
Supplementary lighting module; Comprise ruddiness supplementary lighting module and blue light supplementary lighting module, the ruddiness supplementary lighting module is made up of ruddiness light filling lamp group and drive circuit thereof, and the blue light supplementary lighting module is made up of blue light light filling lamp group and drive circuit thereof; Relation according to red, blue light filling lamp group output intensity and input current; The different duty pwm signal of control module output inserts respective drive circuit control end, and the output of drive circuit connects corresponding light filling lamp group, thereby realizes the control to light intensity;
User interactive module is made up of display screen and input keyboard, realizes detecting in real time demonstration, user environmental threshold value modification stage by stage, system's light filling amount inquiry and system's electric power thus supplied and shows.
Also comprise power module, power module utilize solar panels with conversion of solar energy for electrical power storage in accumulator, for each module provides the energy.
Described light filling lamp group is a led array; Select for use red LED lamp to send the ruddiness that centre wavelength is 650nm; It is the 450nm blue light that blue LED lamp sends centre wavelength, and the wavelength width of red, blue LED lamp is all smaller or equal to 30nm, and it is the core chip for driving that said drive circuit adopts PT4115.
Said detection module adopts the two-way silicon photocell respectively at red spectral band 600-700nm and blue wave band 400-500nm, periodically detects red, blue light light intensity, adopts the DS18B20 temperature sensor to gather Current Temperatures simultaneously.
Said control module is single-chip microcomputer STC12C5A60S2.
In the said led array, the even mixed distribution of red-light LED and blue-ray LED, the largest light intensity that wherein red light filling lamp group can be exported are 5-10 times of blue light filling lamp group.
The present invention compared with prior art has the following advantages:
1), realizes dividing wavelength quantitative light filling as required to plant according to the characteristics of plant different phase growth.
2) add temperature detection, avoid blindness light filling under unfavorable temperature, effectively saved the energy.
3) utilize solar energy, need not additional power source, the environmental protection low-carbon (LC).
4) absorptivity of plant is high.
5) utility rate of luminous energy is high, and energy consumption is low.
Description of drawings
Fig. 1 is plant environment light intensity, need light filling amount, PWM dutycycle, drive current, light filling lamp brightness relationship sketch map.
Fig. 2 is the flow chart of the present invention's intelligence light compensation method.
Fig. 3 is a software flow pattern of the present invention.
Fig. 4 is the present invention's intelligence light filling device structure sketch map.
Fig. 5 is a detection module circuit block diagram of the present invention.
Fig. 6 is a supplementary lighting module circuit block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is explained further details.
In the present embodiment, led array is chosen in the unification of light filling lamp group, and it is cheap, and drive current is little.
Needing the light filling amount among the present invention is the actual luminosity of LED lamp group; System confirms required electric current through the linear proportional relation of group brightness of LED lamp and LED lamp current; Need the LED drive current of the bigger then system of light filling amount output big more; Based on the proportional relation of pulse width modulation (PWM) signal dutyfactor and drive current, realize that the pwm signal duty of Implemented by Using Single-chip Processor is recently quantitatively controlled the LED drive current simultaneously, the PWM dutycycle of the big more correspondence of required drive current is high more; Dutycycle changes between 0%-100%, and promptly the actual light filling amount of system can change between the maximum exportable light intensity of every group of lamp at no light filling as required.Plant environment light intensity, need light filling amount, PWM dutycycle, drive current, light filling lamp brightness relationship are illustrated as shown in Figure 1; Need the light filling amount to be directly proportional with the brightness of light filling lamp; The brightness of light filling lamp is directly proportional with drive current; Drive current is directly proportional with the PWM dutycycle, and the plant environment light intensity is to set the light intensity threshold value with needing light filling amount sum.
Can find out that setting under the same threshold condition, the plant environment light intensity is strong more, needs the light filling amount low more, then single-chip microcomputer output brilliance control pwm signal dutycycle is low more; Under equivalent environment light intensity condition, set the high more light filling amount that then needs of light intensity threshold value and also increase thereupon simultaneously, corresponding with it dutycycle also increases successively.Be higher than under the condition of setting the light intensity threshold value when environmental light intensity, the pwm signal output duty cycle is 0, and light filling lamp group is turn-offed, and output light filling amount is zero.
The present invention has used the mapping relations of silicon photocell electric current and brightness on the whole; The brightness of subrane testing environment; Utilize the direct proportion mapping relations between pwm control signal dutycycle and chip for driving output current, LED electric current and the brightness, the final realization dynamically adjusted the light filling amount as required according to threshold value and actual light intensity.
The size that it should be noted that the light filling amount is not only relevant with the actual environment light intensity with the light requirement in different each stage of plant, and is simultaneously also relevant with environmental temperature.
As shown in Figure 2, according in each vegetative stage of plant to the demand of red blue light, red, blue light threshold value is set; Detect in the plant growth environment red, blue light is strong; Judge through itself and corresponding red, blue light threshold ratio; If environment is red, blue light is by force less than set corresponding red, blue light threshold value, then being judged as needs corresponding light filling, and to need the light filling amount be set red, blue light threshold value and that respective environment is red, blue light is strong is poor; If environment is red, blue light is greater than or equal to set corresponding red, blue light threshold value by force, then is judged as and need not light filling; Like the need light filling,, use corresponding light filling lamp group brightness and drive current linear relation curve then according to need light filling amount; Calculate the input current of corresponding light filling lamp group, according to PWM dutycycle and output current relation curve, calculate the PWM dutycycle again; Adjust the PWM dutycycle by single-chip microcomputer then, thereby accurately control the brightness of light filling lamp group, realize the accurate light filling of intelligence as required; As do not need light filling, then directly turn-off light filling lamp group or make light filling lamp group continue to keep off state, light filling EP (end of program).In the present embodiment, when red, blue light threshold value was set, also photosynthetic preference temperature scope was provided with temperature threshold in each vegetative stage according to plant; Said second step detect red, blue light in the plant growth environment strong before; Detect earlier the environmental temperature of plant growing, when environmental temperature in set temperature threshold scope, then continue to detect in the plant growth environment red, blue light is strong; Judge through itself and corresponding red, blue light threshold ratio; When environmental temperature outside set temperature threshold scope, then directly turn-off light filling lamp group or make light filling lamp group continue keep off state, light filling EP (end of program).
For further illustrating light compensation method process of the present invention, do specifying in conjunction with Fig. 3,
For realizing the method for described a kind of plant intelligent light filling; A kind of equipment of plant intelligent light filling is proposed; It has utilized, and the subrane light intensity detects, the SCM PWM control signal generates, and accomplishes the control to the LED drive current of PT411 output, finally realizes the quantitative as required light filling of red blue light subrane.
As shown in Figure 4, the equipment of said plant intelligent light filling specifically comprises:
Detection module is realized illumination detection and temperature detection, is divided into temperature detection, the detection of ruddiness light intensity and blue light light intensity and detects three parts; System's supply voltage is 5V, and this module concrete structure block diagram is as shown in Figure 5, and wherein temperature detecting module is made up of with its standard modulate circuit temperature sensor 18B20; Its data wire inserts single-chip microcomputer P1.0 mouth, realizes the collection of temperature, the work of completing steps 200; Because the short circuit current of silicon photocell is proportional to extraneous light intensity; Therefore illumination of the present invention detects adopts the ruddiness 2BU6 and the blue light 2BU6 of wave-length coverage at 400-500nm of wave-length coverage at 600-700nm, and the sensing element as the detection of subrane light intensity adopts 4 road operational amplifier LM324; Use operational amplifier small-signal standard I/V change-over circuit and filter circuit; The short circuit current of detected two-way silicon photocell is changed respectively and amplified, and the scope of change sampled voltage that can be through the adjustment sampling resistor inserts the AIN end input of each 14 ADC module MAX1026 respectively through the two-way analog signal after the conditioning; Be converted into data signal from the output of DOUT end; The ruddiness data signal inserts single-chip microcomputer P1.1 mouth, the blue light data signal inserts the P1.2 mouth, thereby realizes that the subrane light intensity detects, performing step 500 work;
Control module is made up of single-chip microcomputer and its peripheral circuit, selects for use STC12C5A60S2 as core processor; Adopt the power supply of standard interface circuit 5V power supply, wherein the P0 mouth connects 8 circuit-switched data mouths of liquid crystal display, and the P1 mouth is responsible for linking to each other with sampled signal; Accomplish the collection of Monitoring Data, the P2 mouth connects the 4*4 matrix keyboard, and P3.0, P3.1 are used for the reading and writing data line that single-chip microcomputer is connected with serial ports; The download of completion program, P3.2-P3.7 position liquid crystal control end, P4.2, P4.3 are SCM PWM control end delivery outlet; Based on above this modular circuit and relative peripheral,, can realize system embodiment functional sequence as shown in Figure 3 in conjunction with using independently developed systems soft ware; Need the corresponding PWM dutycycle of light filling amount according to two wave bands, output pwm signal is realized the accurate control of plant light filling respectively; Because the crystal oscillator frequency of single-chip microcomputer is 12MHz, the pwm signal frequency that directly produces is greater than the scope of PT4115 reception signal, and system can adopt frequency division to realize to needing;
Supplementary lighting module; Comprise ruddiness supplementary lighting module and blue light supplementary lighting module, the ruddiness supplementary lighting module is made up of ruddiness light filling lamp group and drive circuit thereof, and the blue light supplementary lighting module is made up of blue light light filling lamp group and drive circuit thereof; Wherein light filling lamp group is a LED light filling array; Drive circuit is the PT4115 driver module, and red blue two-way is realized the quantitative light filling of subrane, and its concrete structure block diagram is as shown in Figure 6.Because the input voltage range of PT4115 is in the 8-30V scope; Therefore one embodiment of the present of invention adopt the 12V power supply to two-way, and the DIM control end of two-way PT4115 links to each other with two-way PWM output respectively; Frequency is reduced in the 100Hz-20KHz scope behind the pwm signal frequency division; Wherein the ruddiness chip for driving inserts the pwm signal that P4.2 produces, the signal that blue light then adopts P4.3 to produce, and chip handbook standard method connection is pressed in all the other ports connections in the module; The wherein selection of sampling resistor needs to calculate according to the specified starting current application of formula of LED lamp group.Adopting the centre wavelength of customization according to this module of plant absorbing spectrum is the arrowband ruddiness high light large power LED of 650nm, inserts between CSN and the inductance through series system and forms led array; It is the narrow-band LED of 450nm that the blue light array adopts centre wavelength, uses the series system place in circuit.Final variation through two-way pwm signal dutycycle, red blu-ray drives chip PT4115 output current changes, and quantitatively changes the output intensity of two paths of LED array, the work of completing steps 800 and step 1000;
User interactive module; Be made up of LCDs and 4*4 matrix keyboard, module adopts the OCM12864-3 liquid crystal display, and its 8 circuit-switched data mouth is connected with single-chip microcomputer P0 mouth; Control end BG_LCD, LCD_E, LCD_R/W, LCD_RS, LCD_CS2, LCD_CS1; Be connected with P3.2-P3.7 successively, can realize that wherein the 4*4 matrix keyboard links to each other with 8 I/O mouths of P2 mouth to the query display of testing result and light filling effect etc.; Can use the setting of needs to system temperature and red blue light, the function of performing step 100 according to system.
This light filling equipment can satisfy institute's demand in steps of light compensation method of the present invention, in addition, is energy savings, and this light filling equipment also can comprise power module, power module utilize solar panels with conversion of solar energy for electrical power storage in accumulator, for each module provides the energy.Power module is made up of solar cell version, accumulator and control circuit.Wherein with linking to each other by battery, input voltage is through LM317 and stablize 12V output for preferred circuit produces outward, realizes the charging to the 12V accumulator with too for the input of control circuit.Because native system needs 12V and two power supplies of 5V; Power module carries out voltage stabilizing output 12V voltage-stabilized power supply signal through MIC29302 voltage stabilizing transformation module with the two ends of accumulator then, uses the adjustment of MIC29302 module simultaneously once more and matches well resistance generation 5V voltage-stabilized power supply signal.Wherein single-chip microcomputer, detection module and user interactive module are all used 5V power supply power supply, have only the LED supplementary lighting module to adopt the power supply of 12V power supply, so this power module can satisfy the power demands of equipment fully, need not additional power source.
Claims (9)
1. the method for a plant intelligent light filling may further comprise the steps,
The first step, according in each vegetative stage of plant to the demand of red blue light, red, blue light threshold value is set;
Second step; Detect in the plant growth environment red, blue light is strong, through itself and corresponding red, judgement of blue light threshold ratio, if environment is red, blue light is by force less than set corresponding red, blue light threshold value; Then being judged as needs corresponding light filling; And needing the light filling amount is set red, blue light threshold value and that respective environment is red, blue light is strong is poor, if environment is red, blue light is greater than or equal to set corresponding red, blue light threshold value by force, then is judged as and need not light filling;
In the 3rd step,,, use corresponding light filling lamp group brightness and drive current linear relation curve then according to need light filling amount like the need light filling; Calculate the input current of corresponding light filling lamp group, according to PWM dutycycle and output current relation curve, calculate the PWM dutycycle again; Adjust the PWM dutycycle by single-chip microcomputer then, thereby accurately control the brightness of light filling lamp group, realize the accurate light filling of intelligence as required; As do not need light filling, then directly turn-off light filling lamp group or make light filling lamp group continue to keep off state, light filling EP (end of program);
It is characterized in that,
When the said first step is provided with red, blue light threshold value; Also photosynthetic preference temperature scope is provided with temperature threshold in each vegetative stage according to plant; Said second step detect red, blue light in the plant growth environment strong before, detect the environmental temperature of plant growing earlier, when environmental temperature in set temperature threshold scope; Then carry out said second step and the 3rd step; When environmental temperature outside set temperature threshold scope, then directly turn-off light filling lamp group or make light filling lamp group continue keep off state, light filling EP (end of program).
2. the method for a kind of plant intelligent light filling according to claim 1; It is characterized in that; Described light filling lamp group is a led array, adopts to comprise the blue-ray LED array that the red-light LED array LED little with comprising blue light absorption peak and half-wave zone scope that plant red light absorption peak and the little LED of half-wave zone scope form forms.
3. the method for a kind of plant intelligent light filling according to claim 1 is characterized in that, said method periodic cycle, and the cycle can be set.
4. the equipment of a plant intelligent light filling comprises,
Detection module is realized illumination detection and temperature detection;
Control module, the data that collect according to detection module, respectively with equipment established temperature threshold value and red, the strong threshold ratio of blue light; When environmental temperature outside set temperature threshold scope, then directly turn-off light filling lamp group or make light filling lamp group continue keep off state, when environmental temperature in set temperature threshold scope; Then detect in the plant growth environment red, blue light is strong, judge through itself and corresponding red, blue light threshold ratio, if environment is red, blue light is greater than or equal to set corresponding red, blue light threshold value by force; Then be judged as and need not light filling, if environment is red, blue light is by force less than set corresponding red, blue light threshold value, then being judged as needs corresponding light filling; And needing the light filling amount is set red, blue light threshold value and that respective environment is red, blue light is strong is poor, then according to need light filling amount, uses corresponding red, blue light filling lamp group brightness and drive current linear relation curve; Calculate the input current of corresponding red, blue light filling lamp group; According to PWM dutycycle and output current relation curve, calculate the PWM dutycycle again, then by single-chip microcomputer adjustment PWM dutycycle; Thereby accurately control the brightness of corresponding red, blue light filling lamp group, realize the accurate light filling of intelligence as required;
Supplementary lighting module; Comprise ruddiness supplementary lighting module and blue light supplementary lighting module, the ruddiness supplementary lighting module is made up of ruddiness light filling lamp group and drive circuit thereof, and the blue light supplementary lighting module is made up of blue light light filling lamp group and drive circuit thereof; Relation according to red, blue light filling lamp group output intensity and input current; The different duty pwm signal of control module output inserts respective drive circuit control end, and the output of drive circuit connects corresponding light filling lamp group, thereby realizes the control to light intensity;
User interactive module is made up of display screen and input keyboard, realizes detecting in real time demonstration, user environmental threshold value modification stage by stage, system's light filling amount inquiry and system's electric power thus supplied and shows.
5. the equipment of a kind of plant intelligent light filling according to claim 4; It is characterized in that; Described light filling lamp group is a led array, selects for use red LED lamp to send the ruddiness that centre wavelength is 650nm, and it is the 450nm blue light that blue LED lamp sends centre wavelength; And the wavelength width of red, blue LED lamp is all smaller or equal to 30nm, and it is the core chip for driving that said drive circuit adopts PT4115.
6. the equipment of a kind of plant intelligent light filling according to claim 4 is characterized in that, also comprise power module, power module utilize solar panels with conversion of solar energy for electrical power storage in accumulator, for each module provides the energy.
7. the equipment of a kind of plant intelligent light filling according to claim 4; It is characterized in that; Said detection module adopts the two-way silicon photocell respectively at red spectral band 600-700nm and blue wave band 400-500nm; Periodically detect red, blue light light intensity, adopt the DS18B20 temperature sensor to gather Current Temperatures simultaneously.
8. the equipment of a kind of plant intelligent light filling according to claim 4 is characterized in that, said control module is single-chip microcomputer STC12C5A60S2.
9. the equipment of a kind of plant intelligent light filling according to claim 5 is characterized in that, in the said led array, the even mixed distribution of red-light LED and blue-ray LED, the largest light intensity that wherein red light filling lamp group can be exported are 5-10 times of blue light filling lamp group.
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