CN103974511B - A kind of fuzzy logic light intensity regulate and control method based on multisensor measurement and data fusion - Google Patents
A kind of fuzzy logic light intensity regulate and control method based on multisensor measurement and data fusion Download PDFInfo
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Abstract
The present invention relates to a kind of fuzzy logic light intensity regulate and control method based on multisensor measurement and data fusion, detect and regulate and control the intensity of illumination of micro-algae, comprise following steps: optical sensor gathers intensity of illumination signal, and intensity of illumination signal is delivered to microprocessor; Microprocessor carries out the calculating of light intensity regulation and control fuzzy algorithmic approach, Multisensor Data Fusion Algorithm to data, result is delivered in fuzzy logic light intensity classification regulator control system; Control system is carried out the regulation and control of different operating state to external classification regulation and control LED light group in fuzzy logic. The invention has the advantages that, make more convenient to operate to bait micro-algae reactor of user; Light source is applicable to the reactor of different-diameter and the spectrum demand of algae culture; Light intensity regulation and control can provide reliable and accurate measurement parameter.
Description
[technical field]
The present invention relates to fishery cultivating microenvironment monitoring field, specifically, is a kind of based on multisensor measurement and numberAccording to the fuzzy logic light intensity regulate and control method merging.
[background technology]
In prior art about fishery both culturing microalgae microenvironment monitoring field, there is following defect:
1. some bait micro-algae bioreactors only adopt the light source of natural daylight as system, when micro algae growth is to certainIn the stage, microalgae cell density increases, microalgae cell self block mutually the light that makes microalgae photobiological reactor center regionBecome very weak according to intensity, be difficult to meet the needs of micro-algae Fast Growth.
2. what some bait micro-algae bioreactors adopted is using natural daylight as external light source, is aided with single fluorescent tube and doesFor the design of built-in light source. The single fluorescent tube of the inner installation and deployment of retort is as internal light source, although system is by installingBuilt-in light source has reached the effect that increases intensity of illumination, but in the time that the outside available light of retort is weak, is still difficult to reach baitThe optimum illumination intensity of material micro algae growth.
3. what some bait micro-algae bioreactors adopted is using natural daylight as external light source, and retort is inner installsDispose the design of many fluorescent tubes as internal light source, this light source design mode has improved lighting effect, but can makeThe structure too complex of retort inside, affects circulating of the inner nutrient solution of tank, and at night because of without external light source, lightAccording to effect poor effect.
4. what most of bioreactors adopted is fluorescent tube, and very easily broken, not only installation and repairing is very difficult, andAnd caloric value is large, should not control temperature, energy conversion efficiency is low.
5. what some bioreactors adopted is LED fluorescent tube, but fluorescent tube quantity fixes, photochromic fixing, available lightCannot regulate according to intensity and spectral region, the only algae of the fixing kind of suitable cultivation, and most of algae kind is cultivated with blue light and whiteThe effect that light combines is better.
The controllability deficiency of existing bait micro-algae bioreactor light source design, can not along with microalgae cell notDynamically provide best intensity of illumination with cultivation stage, the illumination of optimal spectrum can not be provided along with the variation of micro-algae kindEffect. Because under same isocandela condition, the impact of the growth efficiency of monochromatic source on micro-algae is large for different types of micro-algaeLittle being not quite similar; In the growth course of micro-algae, the light transmittance in retort is nonlinear change, and existing in additionThe illumination value fixed light color fixing that light source design system provides, can not be dynamic according to the variation of microalgae density in retortAdjust intensity of illumination and spectral region, for reaction container inner cell provides enough illumination and the light of suitable different algae kind photosynthetic responsesSpectrum, the productive rate increase that micro-algae is cultivated is relatively low, and phototranstormation efficiency is lower.
Chinese patent literature CN101724547A discloses a kind of side that carries out microalgae culture experiment by LED tunable opticalMethod and device. But it can not dynamically adjust intensity of illumination and spectral region according to the variation of microalgae density in retort. OrderBefore, can automatically regulate photochromic, light intensity about one, and dynamically adjust illumination for the variation of the microalgae density in reflection tankEquipment or the method for intensity and spectral region yet there are no relevant report.
[summary of the invention]
The object of the invention is for deficiency of the prior art, provide a kind of and measure and data fusion based on multisensorFuzzy logic light intensity regulate and control method.
For achieving the above object, the technical scheme that the present invention takes is:
Measure and the fuzzy logic light intensity regulate and control method of data fusion based on multisensor, detect and regulate and control micro-algaeIntensity of illumination, comprises following steps:
(1) by 2 optical sensor composition sensor groups, be placed on back-to-back in micro-algae retort, by a LED fluorescent tubeBe arranged in the transparent glass tube of retort upper cover, 4 LED fluorescent tubes be arranged on the retort support below retort to lightAll be connected with outside light intensity control with LED light tube group according to sensor;
(2) optical sensor gathers intensity of illumination signal, and intensity of illumination signal is delivered to microprocessor;
(3) microprocessor carries out the calculating of light intensity regulation and control fuzzy algorithmic approach, Multisensor Data Fusion Algorithm to data, will tieFruit is delivered in fuzzy logic light intensity classification regulator control system;
(4) control system is carried out the regulation and control of different operating state to external classification regulation and control LED light group in fuzzy logic.
Described optical sensor group is arranged on the centre position of transparent pipe and retort outer wall in retort, to inside and outside twoThe weight setting of the data of side direction sensor collection is 0.25 and 0.75.
Described data anastomosing algorithm is, establishesRepresent the result of the n time sampling in i sensor short time, whereinMaximum is, minimum value is, each sensor measurement arithmetic mean of instantaneous value while sampling for n time continuouslyFor:
Wherein n > 2, be arranged on the illuminance that a back-to-back group sensor of same position records and be:
In formulaRepresent a position sensor measurement arithmetic mean of instantaneous value toward the outer side,TableShow the sensor measurement arithmetic mean of instantaneous value of a position towards inner side.
Described light intensity regulation and control fuzzy algorithmic approach is that the LED light tube group switch in the light source of whole illumination system is dividedBe four kinds of duties, obtain illuminance value in tank through Multi-sensor Fusion algorithm, calculate frustule concentration, as mould simultaneouslyStick with paste the input variable of reasoning controller, then again this input quantity is done to standardization, its excursion is hinted obliquely to response opinionIn territory, set up the corresponding relation between clear amount and fuzzy quantity by membership function, determine that input value is corresponding to linguistic variableLinguistic Value is as the input of fuzzy control reasoning. Fuzzy control reasoning taking rule base and input variable as foundation, through fuzzy reasoningObtain the ambiguous result of classification light source, realize the classification tune to intensity of illumination by controlling the duty of light sourceControl.
Described LED light tube group duty is that all fluorescent tubes are all closed as duty 0, open separately built-in fluorescent tubeFor duty 1, then two fluorescent tubes opening on any diagonal of external light source are duty 2, and all fluorescent tubes are all openedFor duty 3.
The invention has the advantages that:
1. the method for designing of the light source of external gradable regulation and control light intensity in adopting, built-in fluorescent tube number is 1, reducesThe quantity of fluorescent tube in bucket, optimized the structure of reaction container, make more convenient to operate, right to bait micro-algae reactor of userThe cleaning of reaction container is also convenient. Light source adopts LED fluorescent tube, and fluorescent tube is adjustable apart from retort position, and LED fluorescent tube is photochromic adjustable,Make light source be applicable to the reactor of different-diameter and the spectrum demand that different algal species is cultivated.
2. adopt the intensity of illumination in multisensor measurement and Data Fusion of Sensor method measurements and calculations retortValue, for light intensity regulation and control provide reliable and accurate measurement parameter.
3. adopt fuzzy logic light intensity classification regulate and control method, can be according to the upgrowth situation of micro-algae in retort and micro-algaeIncubation light requirement, in the each group of dynamic regulation, the light on and off of external light source, have improved the precision of illumination control, make micro-algaeGrowth can obtain better illumination condition all the time, and then makes the cultivation productive rate of micro-algae higher, to both culturing microalgae and meticulous fisheryDevelopment have very large promotion.
[brief description of the drawings]
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is light intensity control workflow diagrams.
Accompanying drawing 3 is fuzzy logic light intensity classification regulate and control method block diagrams.
Accompanying drawing 4 is the technique mistakes of cultivating bait micro-algae in the bioreactor adopting with interior external classification regulation and control light sourceJourney.
Form one is that heart-shaped flat algae is the experimental data form of embodiment taking Asia.
[detailed description of the invention]
Below in conjunction with accompanying drawing, detailed description of the invention provided by the invention is elaborated.
The Reference numeral and the part that in accompanying drawing, relate to are as follows:
1. light intensity control 2. optical sensor groups
3.LED light tube group 4. retort supports
5. reacting tank body 6. transparent glass tubes
7. retort upper cover 8. optical sensor outlets
Refer to Fig. 1, Figure 1 shows that a kind of fuzzy logic light intensity based on multisensor measurement and data fusion of the present inventionThe device structure schematic diagram of regulate and control method. Described interior external light-source system comprises reacting tank body 5, retort upper cover 7, retortSupport 4, LED light tube group 3, light intensity control 1, optical sensor group 2 and transparent glass tube 6. Described retort upper cover 7 coversOn reacting tank body 5, described transparent glass tube 6 is fixed on retort upper cover 7 positions, middle. On described retort upper cover 7Be provided with optical sensor outlet 8. Described retort support 4 is fixed on reacting tank body 5 bottoms, and retort support 8 is for stretchingShrinking structure, adjustable bottom collapsing length. Described LED light tube group 3 is totally 5 LED fluorescent tubes, and wherein a LED fluorescent tube is arranged onIn the transparent glass tube 6 being connected with retort upper cover 7, other LED fluorescent tubes are arranged on the support 4 of retort, are fixed on reactionTank is four direction all around, and every fluorescent tube is all connected with outside light intensity control 1. Described optical sensor group 2 is illuminationMeasurement device, is arranged on the centre position of transparent pipe in retort 6 and retort outer wall. Described light intensity control 1 and illuminationSensor group 2 connects by the data wire via optical sensor outlet 8.
It should be noted that, described LED lamp is wire LED lamp, and power is 25w, can be retort surface and provides 4000～5000lux intensity of illumination, the photochromic of LED lamp can adjust accordingly with the algae kind of cultivating. The data that optical sensor measuresBe transferred on light intensity control through light exposure measurement equipment outlet by data wire, light intensity control carries out light intensity tune to light sourceControl. Four outside fluorescent tubes are arranged on the extension of pot bottom support, and the length of this part can be adjusted. Therefore, this cover lightSource device can be placed in the retort of different inner diameters, for multiple Photoreactor provides light source.
The selection of LED lamp in light source, the impact of the growth efficiency of different LED light source on micro-algae is different, forMost of algae kinds, under isocandela condition, the size order that affects of the growth efficiency of monochromatic source on micro-algae is: blue lightLED > red-light LED > green light LED. Different Light combines the impact of the growth rate on the heart-shaped flat algae in Asia: ruddiness+blue-ray LED > greenLight+blue-ray LED > ruddiness+blue light+green light LED > ruddiness+green light LED; Different Light combines the growth rate to Chaetoceros gracilisImpact: ruddiness+blue light+green light LED > green glow+blue-ray LED > ruddiness+blue-ray LED > ruddiness+green light LED. So according to differenceAlgae kind can adopt different photochromic LED lamps, changes spectral region, can be different algae kinds more best light source is provided.
This topology layout design both can be multiple Photoreactor best light source was provided, and reduced again fluorescent tube in tankQuantity, has optimized the structure of retort.
Refer to Fig. 2, Figure 2 shows that light intensity control workflow diagram. Described light intensity control is by fuzzy logicExternal classification regulation and control LED light tube group, optical sensor group, power module, microprocessor, isolating and protecting device, fuzzy logic lightStrong classification regulator control system, multi-sensor data collection system, light intensity regulation and control fuzzy algorithmic approach, Multisensor Data Fusion Algorithm groupBecome. Described multi-sensor data collection system is connected with microprocessor, and by optical sensor group, (same position is installed back-to-backOne group of illuminance sensor) signal that detects is delivered to microprocessor, and microprocessor uses light intensity regulation and control fuzzy algorithmic approach, passes moreAfter sensor data anastomosing algorithm calculates data, operation result is delivered in fuzzy logic light intensity classification regulator control system,Control system is carried out the regulation and control of different operating state to external classification regulation and control LED light group in fuzzy logic.
It should be noted that, in the design, the duty of light irradiation apparatus is divided into following four kinds, light intensity can be dividedLevel regulation and control, all fluorescent tubes are all closed as duty 0, and opening separately built-in fluorescent tube is duty 1, then opens external light sourceTwo fluorescent tubes on diagonal are duty 2 arbitrarily, and all fluorescent tubes are all opened as duty 3.
(1) Multisensor Data Fusion Algorithm of luminous intensity measurement:
The sensor of Photoreactor is mounted in the centre position between the center of reactor and the outer wall of reactor, becauseThe induction angle of the photoinduction device on sensor cannot realize to be responded to the illuminance of both sides inside and outside reactor simultaneously, soSame position is installed one group of illuminance sensor back-to-back.
While utilizing sensor image data, the internal noise of sensor and environmental disturbances comprehensively be analyzed. LongitudinallyAnalyze: for the repeatedly analysis of sampled result of a sensor, taking single-sensor as research object, measuring variance is sensorA kind of synthesized attribute of internal noise and environmental disturbances, this attribute is present in the overall process of measurement all the time, once accidentalInterference may produce larger error to the result finally obtaining. Horizontal analysis: utilized multisensor at certain in horizontal analysisThe metrical information of one sampling instant.
While adopting multiple sensors to sample, due to sensor towards difference, calculate this position illuminance timeWait, the shared weight of measurement result of each sensor is also different. One group passes towards two illuminance of inside and outside both sides respectivelyIn the measured reactor of sensor, the volume ratio of nutrient solution is 1:3, so the power of the data that internally lateral direction sensor gathersReset and be decided to be 0.25 and 0.75.
Multi-sensor Fusion algorithm is as follows: establishRepresent the result of the n time sampling in i sensor short time, whereinMaximumFor, minimum valueFor, each sensor measurement arithmetic mean of instantaneous value while sampling for n time continuouslyFor:
Wherein n > 2, be arranged on the illuminance that a back-to-back group sensor of same position records and be:
In formulaRepresent a position sensor measurement arithmetic mean of instantaneous value toward the outer side,TableShow the sensor measurement arithmetic mean of instantaneous value of a position towards inner side.
(2) fuzzy logic light intensity classification regulate and control method
Refer to Fig. 3, Figure 3 shows that fuzzy logic light intensity classification regulate and control method block diagram.
Fuzzy logic light intensity classification regulate and control method and strategy are as follows: by all lamps in the light source of whole illumination systemPipe switch is divided into four kinds of duties, places back-to-back two optical sensors in the centre position of retort center and sidewall,The intensity of illumination signal that sensor gathers, after processing, obtains tank through above-mentioned Multi-sensor Fusion algorithm through D/A change-over circuitInterior illuminance value calculates frustule concentration simultaneously, as the input variable of fuzzy reasoning controller, then again by this input quantityDo standardization, its excursion is hinted obliquely in response domain, set up between clear amount and fuzzy quantity by membership functionCorresponding relation, determine input value input as fuzzy control reasoning corresponding to the Linguistic Value of linguistic variable. Fuzzy control pushes awayReason, taking rule base and input variable as foundation, obtains the ambiguous result of classification light source through fuzzy reasoning, by controlling light sourceThe duty of equipment realizes the classification regulation and control to intensity of illumination. Rule base is the light requirement mould according to bait micro-algae incubationType and retort inner cell density variation model obtain.
Micro-concentration of algae in micro-algae Initial stage of culture retort is lower, and outside natural daylight can meet micro-algae fast cultureNeed, the in running order 0(of light irradiation apparatus i.e. all fluorescent tubes closes); Along with the continuous increase of micro-concentration of algae, near reactionThe illumination condition variation of the center of tank, light intensity regulator control system obtains the photometric data collecting after fuzzy logic analysisThe ambiguous result arriving, compares from the illumination range lower limit (value of different algae kinds is different) of optimum micro algae growth, mouldExceed lower limit once stick with paste result, light irradiation apparatus will enter duty 1(and only open built-in fluorescent tube), i.e. low light level illuminationLED light tube group, opens a LED light of center. Fuzzy logic light intensity classification regulation and control can be set according to algae kind rule baseLED lamp photochromic, makes illumination condition in retort be in the spectral region of optimum growth, simultaneously constantly dense according to micro-algaeThe variation of degree, the intensity of illumination of adjusting wire LED lamp. Taking same regulating strategy control when to enter duty 2(opensWhen built-in fluorescent tube, open two fluorescent tubes on any diagonal of external light source) and duty 3(open whole fluorescent tubes).
With respect to traditional simple control mode, this control methods are more accurate to the control of illumination condition, can be along withThe variation dynamic regulation light intensity of the growth needs of bait micro-algae, the growth course of frustule and outside natural daylight.
Refer to Fig. 4, Figure 4 shows that in the bioreactor adopting with interior external classification regulation and control light source and cultivate baitThe technical process of micro-algae. First bait micro-algae is cultivated needs retort to clean, and before removing, cultivates residual micro-algae, anti-The only pollution of residue to this cultivation; Then need to the light intensity of LED lamp and colourity be adjusted to the suitableeest according to what cultivate algae kindClose the scope of micro algae growth; After preparation is carried out, add algae algae kind in a subtle way, it is auto-control state that controller is set, and light is anti-Answer device just to enter automatic cultivation stage, nutrient solution illuminance and cell concentration in the retort that regulator control system arrives Real-time CollectionValue, according to the work of the fuzzy logic light intensity classification regulate and control method classification regulation and control LED light tube group of multisensor measurement and data fusionMake state, make the whole incubation of micro-algae all the time under good illumination condition; Control system is also according to collection simultaneouslyTo frustule concentration value judged whether to reach the concentration K of applicable results, just gather in the crops micro-once reach aimed concn valueAlgae, enters next cultivation stage, otherwise proceeds this cultivation.
Embodiment 1
Algae kind: sub-heart-shaped flat algae
Best range of light intensity: 5000-1000lux
Experiment real-time data collection is in table one:
Can be found out by above table, employing multisensor is measured and the fuzzy logic light intensity regulate and control method of data fusion canWith Real-Time Monitoring and regulate and control light intensity, make micro-algae moment under optimum illumination intensity, improve greatly culture efficiency.
The above is only the preferred embodiment of the present invention, it should be pointed out that the ordinary skill people for the artMember, do not departing under the prerequisite of the inventive method, can also make some improvement and supplement, these improvement and supplement also should be considered asProtection scope of the present invention.
Claims (3)
1. the fuzzy logic light intensity regulate and control method based on multisensor measurement and data fusion, detects and adjusts
The intensity of illumination of controlling micro-algae, is characterized in that, comprises following steps:
(1) by 2 optical sensor composition sensor groups, be placed on back-to-back in micro-algae retort, transparent glass tube is fixedIn position, retort upper cover middle, a LED fluorescent tube is arranged in the transparent glass tube of retort upper cover, by 4 LED lampsPipe is arranged on the retort support below retort, and optical sensor is all connected with outside light intensity control with LED light tube group;
(2) optical sensor gathers intensity of illumination signal, and intensity of illumination signal is delivered to microprocessor;
(3) microprocessor carries out the calculating of light intensity regulation and control fuzzy algorithmic approach, Multisensor Data Fusion Algorithm to data, and result is defeatedDeliver in fuzzy logic light intensity classification regulator control system;
Described Multisensor Data Fusion Algorithm is, establishes yniRepresent the result of the n time sampling in i sensor short time,Wherein maximum is ynim, minimum value is ynil, each sensor measurement arithmetic mean of instantaneous value while sampling for n time continuouslyFor:
Wherein n > 2, be arranged on the illuminance that a back-to-back group sensor of same position records and be:
In formula, represent a position sensor measurement arithmetic mean of instantaneous value toward the outer side, represent the sensor measurement of a position towards inner sideArithmetic mean of instantaneous value;
Described light intensity regulation and control fuzzy algorithmic approach is that the LED light tube group switch in the light source of whole illumination system is divided into fourPlant duty, obtain illuminance value in tank through Multi-sensor Fusion algorithm, calculate frustule concentration simultaneously, push away as fuzzyThe input variable of reason controller, then does standardization by this input quantity again, its excursion hinted obliquely in response domain,Set up the corresponding relation between clear amount and fuzzy quantity by membership function, determine the Linguistic Value of input value corresponding to linguistic variableAs the input of fuzzy control reasoning, fuzzy control reasoning is taking rule base and input variable as foundation, obtains point through fuzzy reasoningThe ambiguous result of level light source, realizes the classification regulation and control to intensity of illumination by controlling the duty of light source;
(4) control system is carried out the regulation and control of different operating state to external classification regulation and control LED light group in fuzzy logic.
2. the fuzzy logic light intensity regulate and control method based on multisensor measurement and data fusion according to claim 1, itsBe characterised in that, described optical sensor group is arranged on the centre position of transparent pipe and retort outer wall in retort, to inside and outsideThe weight setting of the data of both sides direction sensor collection is 0.25 and 0.75.
3. the fuzzy logic light intensity regulate and control method based on multisensor measurement and data fusion according to claim 1, itsBe characterised in that, described LED light tube group duty is that all fluorescent tubes are all closed as duty 0, open separately built-in fluorescent tubeFor duty 1, then two fluorescent tubes opening on any diagonal of external light source are duty 2, and all fluorescent tubes are all openedFor duty 3.
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| CN105636278A (en) * | 2016-03-10 | 2016-06-01 | 深圳市远润欣电子有限公司 | Method and apparatus for recognizing LED lamp through gestures |
| CN105517276B (en) * | 2016-03-15 | 2018-07-24 | 横店集团得邦照明股份有限公司 | A kind of indoor LED intelligent illumination system based on Fusion |
| JP6888312B2 (en) * | 2017-02-02 | 2021-06-16 | 沖電気工業株式会社 | Information processing equipment, information processing methods, and programs |
| CN110229748B (en) * | 2019-06-20 | 2022-09-30 | 成都理工大学 | Photobioreactor with uniformly distributed illumination and design method thereof |
| CN111683429B (en) * | 2020-06-10 | 2022-08-05 | 辽宁工程技术大学 | Comprehensive pipe rack intelligence lighting control system based on thing networking |
| CN113848875A (en) * | 2021-07-20 | 2021-12-28 | 深兰科技（上海）有限公司 | Bottom layer obstacle avoidance method of mobile robot and related device |
| CN113647332A (en) * | 2021-08-12 | 2021-11-16 | 南京赤诚赛斯文化传播中心 | Automatic adjust irradiant cultured equipment and system |
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