CN202222188U - System for accurately adjusting and controlling concentration of carbon dioxide in greenhouse - Google Patents

System for accurately adjusting and controlling concentration of carbon dioxide in greenhouse Download PDF

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Publication number
CN202222188U
CN202222188U CN2011203286553U CN201120328655U CN202222188U CN 202222188 U CN202222188 U CN 202222188U CN 2011203286553 U CN2011203286553 U CN 2011203286553U CN 201120328655 U CN201120328655 U CN 201120328655U CN 202222188 U CN202222188 U CN 202222188U
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carbon dioxide
data
processor
connects
control
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Chinese (zh)
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张海辉
胡瑾
吴婷婷
张佐经
刘典
翟长远
樊宏攀
代建国
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Northwest A&F University
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Northwest A&F University
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Abstract

The utility model relates to a system for accurately adjusting and controlling concentration of carbon dioxide in a greenhouse. The system comprises a data collection module, a collection processor and a control processor, wherein the data collection module is used for collecting carbon dioxide concentration and illumination intensity in the greenhouse in real time; the collection processor is used for primarily processing the collected data; the control processor is used for managing the ranges of illumination intensity and carbon dioxide required by photosynthesis of different crops in different growth phases; and the control processor judges whether the real-time collected illumination intensity value is in the illumination intensity range, calculates the difference between real-time collected carbon dioxide value and the reasonable range in the current phase, and controls the electromagnetic valve of a carbon dioxide gas tank by a driving circuit through an output control signal, so as to accurately adjust and control the carbon dioxide concentration. The system provided by the utility model has the functions of sensitivity to illumination intensity, phased adjusting and controlling, real-time monitoring, wireless transmission, automatic control and the like, and has the advantages of low cost, simpleness in operation and wide application range.

Description

The system of gas concentration lwevel in a kind of accurate controllable greenhouse
Technical field
The utility model belongs to the agricultural modernization field, relates to the regulation and control to greenhouse, is specifically related to the system of gas concentration lwevel in a kind of accurate controllable greenhouse.
Background technology
CO 2Be that green plants carries out one of photosynthetic primary raw material, the every generation of plant 100g dry matter needs to absorb 150g CO 2The green house cultivation is in the airtight relatively place crop for a long time, CO in the canopy 2Concentration altered a great deal in one day, reached maximum 1 ‰～1.2 ‰ before the sunrise, and 2.5～3h reduces to about 0.1 ‰ after the sunrise, was merely CO in the atmosphere 2About 30% of concentration (0.33 ‰), and be maintained to just bottom out in afternoon 2 hours, to about at 4 o'clock in afternoon, returning to atmospheric level, crop needs CO 2Concentration is generally 1 ‰～1.5 ‰.CO 2Concentration low excessively, the photosynthesis of blade stops basically, has seriously hindered the growth of crop, must execute CO through increasing 2Replenish the deficiency of this gas in the canopy.But CO 2Excessive concentration causes the vegetable crop leaf rolling again, influences the absorption of crop to oxygen, can not carry out normal respiratory metabolism, and temperature of shed is raise rapidly, causes the high temperature damage of vegetable crop.Therefore how effectively CO in the controllable greenhouse 2Concentration just becomes a major issue of greenhouse plantation.In addition, intensity of illumination is to influence photosynthesis and CO 2The key factor of utilization ratio, when illuminance was not enough, photosynthetic efficiency was low, excessively CO 2Replenish and to cause CO 2Excessive concentration.Therefore, efficient CO 2Regulation and control need monitoring illuminance in real time, and judge whether illuminance satisfies the photosynthesis demand, thus aid decision CO 2Replenishment control.
External greenhouse CO 2The concentration control facility has developed into more complete degree, and has formed certain standard, but price is very expensive, and the TT&C software that adapts of shortage and China's climatic characteristic.And current domestic majority is to green house CO 2Concentration monitoring all adopts labor management with control, has that the observing and controlling precision is low, labour intensity is big and because the untimely drawback such as irretrievable loss that causes of observing and controlling.Minority adopts the CO of auto-control 2Concentration measurement and control equipment is not considered the illuminance influence, and adopts wired mode to transmit data, and wiring is complicated, has increased cost, and has reduced the flexibility and the reliability of equipment.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art; The purpose of the utility model is to provide the system of gas concentration lwevel in a kind of accurate controllable greenhouse; Support wireless transmission, monitoring in real time, function such as control automatically, have that cost is low, simple to operate, the advantage of applied range.
To achieve these goals, the technical scheme of the utility model employing is:
The system of gas concentration lwevel comprises in a kind of accurate controllable greenhouse
Data acquisition module 1 is realized the real-time collection to gas concentration lwevel in the greenhouse and intensity of illumination;
Acquisition Processor 2 carries out analog-to-digital conversion after send with the data message that collects, and its data input pin connects the data output end of said data acquisition module 1;
Control processor 3 receives the data that Acquisition Processor 2 sends, and converts high-low level output into, and the data output end of control processor 3 connects user interactive module 4, and user interactive module 4 comprises keyboard and display screen;
Control module 5; Comprise carbon dioxide canister 51 and drive circuit 52 thereof; Drive circuit 52 comprises optocoupler U7 and solid-state relay U6, and the negative electrode of optocoupler U7 connects the control signal output of control processor 3, and anode connects 3.3V voltage through the 9th resistance R 9; Emitter stage is connected to the base stage of the first triode Q1 through the tenth resistance R 10; The colelctor electrode of optocoupler U7 is through the positive input terminal of the 6th resistance R 6 connection solid-state relay U6, and the colelctor electrode of optocoupler U7 also connects the anode of the other end connection light emitting diode DS3 of the 7th resistance R 7, the seven resistance R 7; The negative electrode of light emitting diode DS3 is connected to the negative input end of solid-state relay U6 and the colelctor electrode of the first triode Q1, and two outputs of solid-state relay U6 connect the 220V ac signal to the solenoid valve of carbon dioxide canister 51.
Said data acquisition module 1 is carbon dioxide sensor module B530 and optical sensor module I SL29010.
Said Acquisition Processor 2 all is rfic chip CC2430 with control processor 3; The P0.0 of Acquisition Processor 2, P0.1, P0.2 and P0.3 pin are the data-in port of data acquisition module 1; Acquisition Processor 2 sends gas concentration lwevel and intensity of illumination data message through the prevention at radio-frequency port that chip carries; The prevention at radio-frequency port that control processor 3 carries through chip receives the data that Acquisition Processor 2 sends; The P0.7 pin of control processor 3 connects the negative electrode of optocoupler U7, and P0.4, P0.5 and P0.6 pin are the Keyboard Control end, and the P1 mouth links to each other with display screen as data output end.
Said data acquisition module 1 is two groups of carbon dioxide sensor module B530 and one group of optical sensor module I SL29010; The data output end of carbon dioxide sensor module B530 connects P0.0, the P0.1 pin of Acquisition Processor 2 respectively, and optical sensor module I SL29010 connects the P0.2 and the P0.3 pin of Acquisition Processor 2.
The prevention at radio-frequency port of said Acquisition Processor 2 connects antenna, and the prevention at radio-frequency port of control processor 3 connects antenna.
Said control processor different required intensities of illumination of vegetative stage photosynthesis of 3 management crops and carbonic acid gas range parameter, the user can adjust agrotype and each stage parameter preset through user interactive module 4.
The utility model is provided with the threshold range of required light intensity of each vegetative stage of crop and gas concentration lwevel in control processor 3; Receive the data of Acquisition Processor 2 transmissions when said control processor 3 after; Judge earlier whether intensity of illumination collection value in real time belongs to the preset intensity of illumination scope of current vegetative stage
If, then do not process in this scope;
If within this scope; Then gas concentration lwevel collection value in real time and current generation gas concentration lwevel threshold range are compared; If less than the lower limit of set gas concentration lwevel threshold range, then export control signal and open carbon dioxide canister 51 through drive circuit 52; If greater than the higher limit of set gas concentration lwevel threshold range, output alarm signal then is not if in set gas concentration lwevel threshold range, then process.
The utility model compared with prior art has the following advantages:
1) the utility model has been realized CO in the green house 2The intensity of illumination influence has been considered in the real-time collection of concentration and precisely regulation and control simultaneously, and it is big to gather sample, and the concentration control accuracy is high.
2) the utility model has been managed the different vegetative stage CO of crop 2The range information of concentration and intensity of illumination can realize that the different phase target component adjusts automatically, has adaptability.
3) the utility model adopts the ZigBee technology to realize the wireless transmission of image data, has overcome the inconvenience of wiring in the cable data transmission, and has had advantages such as low in energy consumption, that transfer rate is big.
4) the utility model is with low cost, simple to operate, easy to maintenance, is fit to be applied in the green house under the agricultural production pattern that China is the master with the nuclear family.
Description of drawings
Fig. 1 is the entire block diagram of the utility model system.
Fig. 2 is the peripheral circuit diagram that the utility model adopts the control processor of rfic chip CC2430.
Fig. 3 is the utility model carbon dioxide canister drive circuit schematic diagram.
Fig. 4 is that workflow diagram is sent in the data acquisition of the utility model.
Fig. 5 is the Data Control workflow diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is explained further details.
As shown in Figure 1, the utility model is the system of gas concentration lwevel in a kind of accurate controllable greenhouse, comprises
Data acquisition module 1 is selected carbon dioxide sensor module B530 and optical sensor module I SL29010 for use, and the measurement category of B530 is 0 to 10 ‰; Output voltage 0.5 to 4.5V; Have good, the highly sensitive characteristics of linear characteristic, can realize the real-time collection to gas concentration lwevel in the greenhouse, the signal of telecommunication of accomplishing physical quantity transforms; The quantity of sensor assembly B530 can be selected according to the greenhouse area; Usually, should be provided with in the inner representational zone of green house, such as the centre position and the end positions in crop-planting district; ISL29010 is the height accurate sensor, can measure and digitlization the value of ambient light, allows the I through a standard then 2These information of C interface visit can be passed through I 2C interface is by the software control power-down mode, is less than 1 microampere thereby reduce to power consumption.Its working voltage be 2.5V to 3V, and 250 microamperes electric current only need be provided, built-in 15 symbol ADC can change little current signal under the situation that the ac cycle noise exists.
Acquisition Processor 2, its data input pin connects the data output end of said data acquisition module 1;
Control processor 3, its data input pin receive the data that Acquisition Processor 2 sends, and the data output end of control processor 3 connects user interactive module 4, and user interactive module 4 comprises keyboard and display screen;
Control module 5 comprises carbon dioxide canister 51 and drive circuit 52 thereof, and the control signal of control processor 3 is controlled the keying of carbon dioxide canister 51 magnetic valves through drive circuit 52, realizes the accurate regulation and control of carbonic acid gas.
As shown in Figure 2; Peripheral circuit diagram for Acquisition Processor 2; It connects according to handbook for the each several part circuit provides the pin of voltage, and wherein, P0.0, P0.1, P0.2 and P0.3 pin are the data-in port of data acquisition module 1; The data output end of carbon dioxide sensor module B530 connects P0.0, the P0.1 pin of Acquisition Processor 2 respectively, and optical sensor module I SL29010 connects the P0.2 and the P0.3 pin of Acquisition Processor 2.Reset pin is connected to power supply through the 13 resistance R 13, and AVDD1～AVDD12 connects together, and is connected with the RREG_OUT pin simultaneously; The RREG_OUT pin is through the capacity earth of a plurality of parallel connections; The RBISA1 pin is through biasing resistor R14 ground connection, and the RBISA2 pin connects the second crystal oscillator X2 through biasing resistor R15 ground connection between XOSC_Q2 pin and the XOSC_Q1 pin; XOSC_Q2 pin and XOSC_Q1 pin also pass through capacity earth separately; Connect the first crystal oscillator X1 between P2.4/XOSC_Q2 pin and the P2.4/XOSC_Q1 pin, P2.4/XOSC_Q2 pin and P2.4/XOSC_Q1 pin are also separately through capacity earth, and the RF_N pin connects the 6th capacitor C 6 through first inductance L 1; The other end of the 6th capacitor C 6 connects transmitting antenna; Be connected with the 3rd inductance L 3 between TXRX_SWITCH pin and the RF_N pin, be connected with second inductance L, 2, the three inductance L 3 between RF_P pin and the RF_N pin and also be connected on simultaneously between RF_P pin and the TXRX_SWITCH pin.
The peripheral circuit of control processor and the peripheral circuit of Acquisition Processor are basic identical; Increased and being connected of user interactive module 4, wherein P0.4, P0.5 and P0.6 pin are the Keyboard Control end, and the P1 mouth links to each other with display screen as data output end; The connected mode of antenna is identical, act as reception.
As shown in Figure 3; Schematic diagram for the utility model carbon dioxide canister drive circuit 52; Drive circuit 52 comprises optocoupler U7 and solid-state relay U6, and the negative electrode of optocoupler U7 connects the control signal output of control processor 3, and anode connects 3.3V voltage through the 9th resistance R 9; Emitter stage is connected to the base stage of the first triode Q1 through the tenth resistance R 10; The colelctor electrode of optocoupler U7 is through the positive input terminal of the 6th resistance R 6 connection solid-state relay U6, and the colelctor electrode of optocoupler U7 also connects the anode of the other end connection light emitting diode DS3 of the 7th resistance R 7, the seven resistance R 7; The negative electrode of light emitting diode DS3 is connected to the negative input end of solid-state relay U6 and the colelctor electrode of the first triode Q1, and two outputs of solid-state relay U6 connect the 220V ac signal to the solenoid valve of carbon dioxide canister 51.
Control processor 3 when intensity of illumination does not meet rational intensity of illumination scope of current generation, is not then done subsequent treatment according to the real-time Monitoring Data that receives.When intensity of illumination meets rational intensity of illumination scope of current generation; Then current gas concentration lwevel and pre-set threshold are compared; Be lower than set lower threshold if receive data; Control processor 3 places low level with the P0.7 mouth, makes optocoupler U7 conducting, and then makes solid-state relay U6 conducting open carbon dioxide canister 51; When the data that receive were within set threshold range, control module 5 was not worked; When control module 5 work, reach the upper limit of set threshold value up to data monitored, control processor 3 just places high level with the P0.7 mouth, and optocoupler U7 is ended, and then makes solid-state relay U6 break off closing carbon dioxide gas tank 51.Use photoelectrical coupler to reduce the influence of extraneous interference effectively, strengthened the stability of system, so just can make carbon dioxide canister 51 autotelic switches, reduced power consumption and reduced very big manpower system; If current gas concentration lwevel is greater than the higher limit of set carbon dioxide threshold scope; Output alarm signal then; Report to the police through control processor 3 external buzzer or LED lamps, prevent staff's in the excessive harm green house of gas concentration lwevel safety.
Simultaneously, because the greenhouse inner case is complicated, native system is provided with user interactive module 4 specially, is connected with the data output end of control processor 3, and this module is made up of keyboard input submodule and LCD display sub-module two parts.Control processor different required intensities of illumination of vegetative stage photosynthesis of 3 management crops and carbonic acid gas range parameter; The user can be under different situations; The gas concentration lwevel and the intensity of illumination range of needs of Different Crop different phase are set; Accomplish parameter such as threshold value through keyboard and set, the LCD display sub-module can be convenient to the user and observe current state.
In addition and since the operating voltage of carbon dioxide sensor module B530 for direct current 9V to 18V, the CC2430 chip needs 3.3V, control and need supply power with 5V with relay module, so the utility model need provide 12V, 5V, three kinds of operating voltages of 3.3V.Adopt the power supply adaptor power supply of 12V direct current input, 12V voltage is carbon dioxide sensor module B530 power supply after the LM7812CT voltage stabilizing.Obtain 5V voltage by step-down chip LM2596 step-down again, after the TPS79533 step-down, obtain 3.3V voltage again, be the power supply of CC2430 core circuit.The application isolation voltage is that the isolated supplies module of 1000VDC 5V-5V is carried out isolated from power, and output voltage is drive circuit 52 power supplies.5V-5V isolated supplies module realizes CC2430 core circuit and the isolation of output driving circuit on power supply; Thereby isolated forceful electric power disturbs by output driving circuit and imports to greenhouse intelligent controller inside; Whole system is produced harmful effect, and whole electric power system is reliable and stable.
The utility model is to different crops and different puberty thereof; Can be in advance through user interactive module 4 input relevant parameters; Make carbonic acid gas reach the standard of expection, reach the purpose of gas concentration lwevel in the accurate control greenhouse, be applicable to multiple occasion flexibly.User interactive module 4 is made up of keyboard input submodule and display screen submodule two parts; Wherein keyboard input submodule adopts free-standing keyboard; By reset key, mode key, OK key, add a key, subtract a key, left button, right button form; Accomplish the setting of gas concentration lwevel and intensity of illumination upper lower limit value, the display screen submodule adopts liquid crystal display OCM12864 to show the gas concentration lwevel of collection and the relevant information of intensity of illumination.The P1.0, P1.3, the P1.5 that wherein control processor 3 link to each other with shift register 74HC595; The delivery outlet of register is connected as data with liquid crystal display data port (DB0-DB7) to be imported; Through the sequential of software simulation OCM12864, realize the inquiry and the demonstration of real time data again.
As shown in Figure 4; For workflow diagram is sent in the data acquisition of the utility model; At first call ZigBee transport module networking host-host protocol program behind the opening initialization, requester network is sought route and is carried out MANET, realizes that the signal of this node adds wireless sensor network; If add successfully then carry out data acquisition, otherwise continue load networks till adding; Based on the signal of telecommunication that successfully collects, according to analytical function signal is resolved, and encode to the data code mode under the ZigBee of the system agreement; The final coding based on Monitoring Data under the ZigBee agreement through the realization of MANET forwarding mechanism sent to the data of control appliance.
As shown in Figure 5, be the Data Control workflow diagram of the utility model, be different from the collection transmitting system, control treatment system work at first operation threshold is provided with the setting that module is accomplished controlled module shutter door limit, carries out system initialization; Call ZigBee networking host-host protocol, seek route and carry out MANET, realize that this nodal information adds wireless sensor network, if add successfully, then carry out data and receive request, otherwise continue load networks till adding; The control appliance that has added network receives the information coding that monitoring node sends based on wireless sensor network, as takes defeat and then adopt retransmission mechanism to call the reception program once more; Data to receiving are decoded, are resolved, and accomplish threshold ratio, realize the control to controllable device, accomplish the precisely control of intelligence to greenhouse CO2 concentration.

Claims (6)

1. the system of the interior gas concentration lwevel of accurate controllable greenhouse is characterized in that, comprises
Data acquisition module (1) is realized the real-time collection to gas concentration lwevel in the greenhouse and intensity of illumination;
Acquisition Processor (2) carries out analog-to-digital conversion after send with the data message that collects, and its data input pin connects the data output end of said data acquisition module (1);
Control processor (3) receives the data that Acquisition Processor (2) sends, and converts high-low level output into, and the data output end of control processor (3) connects user interactive module (4), and user interactive module (4) comprises keyboard and display screen;
Control module (5); Comprise carbon dioxide canister (51) and drive circuit (52) thereof; Drive circuit (52) comprises optocoupler (U7) and solid-state relay (U6); The negative electrode of optocoupler (U7) connects the control signal output of control processor (3); Anode connects 3.3V voltage through the 9th resistance (R9), and emitter stage is connected to the base stage of first triode (Q1) through the tenth resistance (R10), and the colelctor electrode of optocoupler (U7) is through the positive input terminal of the 6th resistance (R6) connection solid-state relay (U6); The colelctor electrode of optocoupler (U7) also connects the 7th resistance (R7); The other end of the 7th resistance (R7) connects the anode of light emitting diode (DS3), and the negative electrode of light emitting diode (DS3) is connected to the negative input end of solid-state relay (U6) and the colelctor electrode of first triode (Q1), and two outputs of solid-state relay (U6) connect the 220V ac signal to the solenoid valve of carbon dioxide canister (51).
2. the system of gas concentration lwevel is characterized in that said data acquisition module (1) is carbon dioxide sensor module B530 and optical sensor module I SL29010 in the accurate controllable greenhouse according to claim 1.
3. the system of gas concentration lwevel in the accurate controllable greenhouse according to claim 1; It is characterized in that; Said Acquisition Processor (2) and control processor (3) all are rfic chip CC2430; The P0.0 of Acquisition Processor (2), P0.1, P0.2 and P0.3 pin are the data-in port of data acquisition module (1); Acquisition Processor (2) sends gas concentration lwevel and intensity of illumination data message through the prevention at radio-frequency port that chip carries, and control processor (3) receives the data that Acquisition Processor (2) sends through the prevention at radio-frequency port that chip carries, and the P0.7 pin of control processor (3) connects the negative electrode of optocoupler (U7); P0.4, P0.5 and P0.6 pin are the Keyboard Control end, and the P1 mouth links to each other with display screen as data output end.
4. the system of gas concentration lwevel in the accurate controllable greenhouse according to claim 3; It is characterized in that; Described data acquisition module (1) is two groups of carbon dioxide sensor module B530 and one group of optical sensor module I SL29010; The data output end of carbon dioxide sensor module B530 connects P0.0, the P0.1 pin of Acquisition Processor (2) respectively, and optical sensor module I SL29010 connects the P0.2 and the P0.3 pin of Acquisition Processor (2).
5. the system of gas concentration lwevel is characterized in that in the accurate controllable greenhouse according to claim 3, and the prevention at radio-frequency port of said Acquisition Processor (2) connects antenna, and the prevention at radio-frequency port of control processor (3) connects antenna.
6. the system of gas concentration lwevel in the accurate controllable greenhouse according to claim 3; It is characterized in that; Different required intensities of illumination of vegetative stage photosynthesis of said control processor (3) management crop and carbonic acid gas range parameter, the user can adjust agrotype and each stage parameter preset through user interactive module (4).
CN2011203286553U 2011-09-05 2011-09-05 System for accurately adjusting and controlling concentration of carbon dioxide in greenhouse Expired - Fee Related CN202222188U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014188303A1 (en) * 2013-05-24 2014-11-27 Koninklijke Philips N.V. Dynamic light recipe for horticulture
CN105638324A (en) * 2016-03-21 2016-06-08 安徽工程大学 CO2 fertilization control system for greenhouse
CN106200605A (en) * 2016-09-18 2016-12-07 王燕红 The release of gas intelligence, management, control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014188303A1 (en) * 2013-05-24 2014-11-27 Koninklijke Philips N.V. Dynamic light recipe for horticulture
CN105638324A (en) * 2016-03-21 2016-06-08 安徽工程大学 CO2 fertilization control system for greenhouse
CN106200605A (en) * 2016-09-18 2016-12-07 王燕红 The release of gas intelligence, management, control system

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Granted publication date: 20120523

Termination date: 20130905