CN103299892B - Cluster-type water temperature control system for floating tobacco seedling growing pond - Google Patents
Cluster-type water temperature control system for floating tobacco seedling growing pond Download PDFInfo
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- CN103299892B CN103299892B CN201310270337.XA CN201310270337A CN103299892B CN 103299892 B CN103299892 B CN 103299892B CN 201310270337 A CN201310270337 A CN 201310270337A CN 103299892 B CN103299892 B CN 103299892B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
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Abstract
A cluster-type water temperature control system for a floating tobacco seedling growing pond comprises an external heat exchange type water pond heating device, a plurality of independent water pond water temperature controllers, a control bus and a central control computer, wherein the external heat exchange type water pond heating device is used for heating a water pond; as an external heat exchange type heating mode is adopted, all parts are mounted outside the seedling growing pond, and the modifying and mounting operations are convenient on the basis of a conventional seedling growing pond; the independent water pond water temperature controllers are used for accurately controlling the water temperature of a single seedling growing pond by controlling a combined action of an electromagnetic valve and a circulating water pump; and the independent water pond water temperature controllers are connected with the central control computer through the control bus to form a cluster-type control system for achieving centralized monitoring. By using the system, the water temperature of the floating seedling growing pond can be adjusted to an optimal seedling growth temperature, so that the seedling growing time is shortened, the tobacco seedling quality is improved, and the purposes of improving productivity and efficiency are achieved; and the system has the advantages of convenience for mounting and use, preciseness for control, high automation level and the like.
Description
Technical field
The present invention relates to a kind of concentrating type tobacco floating seed rearing pond water temperature control system.
Background technology
Tobacco seedling object is for Production of Large Fields provides in good time, sufficient, healthy and strong, neat cigarette seedling.Floating seedlings be by planting seed in the seedling-cultivating tray of matrix is housed, seedling-cultivating tray swims in nursery pond nutrient solution surface, complete a kind of soilless-cultivated seedling method of whole seedling raising process, aspect intensive management, production efficiency and cultivation cigarette seedling quality, have the incomparable management of conventional seedbed system and technical advantage, its successful research is the major transformation of tobacco seedling history the next item up.Floating seedlings technology is widely used in China, and within 2009, floating seedlings area is 111.82 ten thousand hectares, accounts for 97.02% of the gross area.
Flue-cured tobacco is the warm crop of happiness, and the preference temperature of growing is 20-24 ℃, needs the accumulated temperature of 3300～3500 ℃ the time of infertility.The normal sprouting of tobacco seed needs enough moisture and suitable temperature.For meeting the field-transplanting in the first tenday period of a month in May, optimum sowing time should be that mid-February is to early March.And most cigarettes in this period district exists the problems such as temperature is low, day and night temperature large, nursery pond solution temperature is low, have a strong impact on the seedling-growing time of cigarette seedling and the cultivation in strong sprout.
The control of tobacco seedling temperature at present mainly realizes by plastic greenhouse or greenhouse heat-insulating, is difficult to reach the optimum temperature of emergence of seedling and its growth when environmental temperature is lower.Adopt modern greenhouse to grow seedlings can to carry out greenhouse that integral body is heated and carry out precision temperature control, but the cost of growing seedlings in can increasing like this.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art provide a kind of simple in structure, avoid low temperature environment on the impact of seedling raising process, be conducive to reduce seedling-growing time, can cultivate strong sprout and strengthen Seedling Quality, and shorten the also concentrating type tobacco floating seed rearing pond water temperature control system in seedling stage after transplanting.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of concentrating type tobacco floating seed rearing pond water temperature control system, comprise external heat switch type pond heating apparatus, independent sump water temperature controller, control bus and central control computer, described independent sump water temperature controller is controlled the temperature in the pond of growing seedlings by controlling described external heat switch type pond heating apparatus realization, and described control bus is connected a plurality of independent sump water temperature controllers with described central control computer.
Described external heat switch type pond heating apparatus comprises heat exchanger, magnetic valve, water circulating pump and circulating line, described external heat switch type pond heating apparatus is arranged on beyond nursery pond, the described water circulating pump pool inner water that makes to grow seedlings is entered heat exchanger and is formed closed circulation by described circulating line, and described heat exchanger is connected with outside heating system and opens and closes by outside heating system described in described solenoid control.
Described independent sump water temperature controller obtains temperature information by a plurality of temperature sensors that are arranged in nursery pond and on hot water pipeline, and realizes the control to water temperature by magnetic valve described in the temperature information FEEDBACK CONTROL of obtaining and water circulating pump combination action.
Described independent sump water temperature controller is provided with control appliance, transceiver and human-computer interaction device, by human-computer interaction device, can independently control the single sump water temperature of growing seedlings, by transceiver, be connected with control bus a plurality of independent sump water temperature controllers and described central control computer are connected to form to concentrating type control system.
Described control bus adopts RS485 bus.
Described central control computer adopts industrial computer, and described central control computer communicates by described control bus and independent sump water temperature controller, and independent sump water temperature controller feeds back to described central control computer by the water temperature of nursery pond.
Owing to adopting said structure and operation principle, this device tool has the following advantages:
1, this device adopts external heat exchanged form to heat to nutrient solution in pond.By heat exchanger, the ducted hot water of central heating and nutrient solution are carried out to exchange heat, by water circulating pump, make nutrient solution in pond constantly cycle through heat exchanger to reach the object that pool inner water temperature is balanced.Nutrient solution, only in the circulation of nursery pond inner sealing, can not affect total amount and the composition of nutrient solution in nursery pond, effectively avoids the damage by disease and insect cross-infection between nursery pond simultaneously.
2, system architecture is simple, and the parts such as heat exchanger, water circulating pump, water pipe, controller, valve have all adopted the mode of installing outside pond, is applicable to the pond of growing seedlings of various different structure sizes, and without any rebuilding construction is carried out in pond.Have easy for installation, the advantage that adaptability is good.
3, in pond zones of different a plurality of temperature sensors are set, by the comprehensive computing of each regional temperature value, obtain pond real time temperature information, in conjunction with set target temperature, adopt corresponding control algolithm to make control decision again, the combination of controlling magnetic valve and water circulating pump moves to realize the control of temperature, there is the precision of control, uniformity of temperature profile, the advantage that system reliability is high.
4, adopt concentrating type to control, automaticity is high, uses easy to operate.
In sum, this device can regulate floating seedlings sump water temperature to seedling optimum growth temp easily, thereby shortens seedling raise period, improves cigarette seedling quality, reaches the object increasing production and improying productivity.
Accompanying drawing explanation
Fig. 1 is external heat switch type of the present invention pond heating apparatus structural representation.
Fig. 2 is independence sump water temperature controller system structural representation of the present invention.
Fig. 3 is concentrating type control system structural representation of the present invention.
In Fig. 1 to 3, 1, heat exchanger, 2, magnetic valve, 3, water circulating pump, 4, circulating line, 5, cold junction temperature sensor, 6, medium temperature sensor, 7, hot-side temperature sensor, 8, heat supply hot water temperature sensor, 9, the pond of growing seedlings, 10, independent pond temperature controller, 11, single-chip microcomputer, 12, memory, 13, 14, 15, 16, temperature transmitter, 17, analog-digital converter, 18, solenoid control relay, 19, water pump control relay, 21, bus transceiver, 21, LCDs, 22, keyboard, 23, power supply, 24, central control computer, 25, bus transceiver, 26, control bus, 27, pond heating apparatus.
Embodiment
Below in conjunction with accompanying drawing, further describe the specific embodiment of the present invention.
The technical solution used in the present invention is: by external heat switch type pond heating apparatus, and independent sump water temperature controller, control bus and central control computer form
As shown in Figure 1, external heat switch type pond heating apparatus comprises heat exchanger 1, magnetic valve 2, water circulating pump 3 and circulating line 4.Circulating line 4 is arranged on grows seedlings outside pond 9, and heat exchanger 1 and water circulating pump 3 are installed on circulating line 4.By water circulating pump 3, the nutrient solution of growing seedlings in pond 9 is retracted in circulating line 4, then heats by the nutrient solution in 1 pair of circulating line 4 of heat exchanger, and then send by circulating line 4 pond 9 of growing seedlings back to.Heat exchanger 1 is also connected with central hot water supply system pipeline by magnetic valve 2, and during magnetic valve 2 conducting, hot water is realized and heated in the pond 9 of growing seedlings because pressure of supply water transfers heat to by heat exchanger 1 nutrient solution that circulating line 4 transports.For realizing accurate water temperature uniformly, control, three temperature sensors have been installed respectively along its length in the pond 9 of growing seedlings: cold junction temperature sensor 5, medium temperature sensor 6, hot-side temperature sensor 7; At the central heating hot water inlet position of heat exchanger 1, heat supply hot water temperature sensor 8 is installed.Cold junction temperature sensor 5, medium temperature sensor 6, hot-side temperature sensor 7 and heat supply hot water temperature sensor 8 all adopt PT100 high-precision thermal resistance sensor.Heat supply hot water temperature sensor 8 gathers central heating system hot water temperature, for calculating the required hot water flow of intensification heat exchange.Cold junction temperature sensor 5, medium temperature sensor 6, hot-side temperature sensor 7 gathers respectively the sump water temperature of position.Cold junction temperature sensor 5, medium temperature sensor 6, the data of hot-side temperature sensor 7 and heat supply hot water temperature sensor 8 are delivered to independent sump water temperature controller 10, by comprehensive analysis, determine afterwards pond temperature and temperature homogeneity.Controller 10 contrasts the target temperature of real time temperature and setting, and carries out Decision Control according to the control algolithm of storage.Controller 10, by controlling the switching frequency of magnetic valve 2 and the control that dutycycle realizes heat exchange amount, is realized nutrient solution by controlled circulation water pump 3 and is heated, and make uniformity of temperature profile.
As shown in Figure 2, cold junction temperature sensor 5, medium temperature sensor 6, hot-side temperature sensor 7 and heat supply hot water temperature sensor 8 are that the d. c. voltage signal that converts 0-5V to by corresponding temperature transmitter 13,14,15,16 after the signal of telecommunication is delivered to analog-digital converter 17 by the temperature transition of position.Analog-digital converter 17 has multichannel selection function, thereby can successively the temperature voltage signal of 4 passages be converted to data signal, is transported to single-chip microcomputer 11 and realizes obtaining of multichannel temperature data.Single-chip microcomputer 11 carries out computing and decision-making by the control algolithm of setting by 4 temperature datas that obtain together with the target temperature of preserving in memory 12, respectively by solenoid control relay 18, thereby the magnetic valve 2 shown in 19 couples of Fig. 1 of water pump control relay institute and water circulating pump 3 are controlled the control of realization to water temperature.User can arrange by 22 pairs of target temperatures of keyboard, can observe the working status parameter such as each warm spot temperature by LCDs 21.Bus transceiver 20, is communicated by letter with central computer thereby realize for carrying out exchanges data with control bus as EBI.
As shown in Figure 3, central control computer 24 adopts industrial computer, and control bus 26 adopts RS485 bus.Central control computer 24 carries out exchanges data by bus transceiver 25 and control bus, thereby realizes and the communicating by letter of each independent water temperature regulater 10.Every platform independent water temperature regulater has independent unique address, when certain independent water temperature regulater is received the query statement that central control computer sends, as the destination address in self address and instruction unanimously returns to central control computer by current temperature data and working status parameter.Thereby central control computer adopts this mode according to regularly each the independent water temperature regulater realization monitoring to all independent water temperature regulaters of poll successively of each independent water temperature regulater address, and user can see temperature conditions and the duty in all ponds of growing seedlings on the display of central control computer 24.On the other hand, user can arrange by the running parameters such as control target temperature to arbitrary pond of growing seedlings on central control computer 24.
Claims (5)
1. a concentrating type tobacco floating seed rearing pond water temperature control system, comprise external heat switch type pond heating apparatus, independent sump water temperature controller, control bus and central control computer, it is characterized in that: described independent sump water temperature controller is controlled the temperature in the pond of growing seedlings by controlling described external heat switch type pond heating apparatus realization, described control bus is connected a plurality of independent sump water temperature controllers with described central control computer, described external heat switch type pond heating apparatus comprises heat exchanger, magnetic valve, water circulating pump and circulating line, described external heat switch type pond heating apparatus is arranged on beyond nursery pond, the described water circulating pump pool inner water that makes to grow seedlings is entered heat exchanger and is formed closed circulation by described circulating line, described heat exchanger is connected with outside heating system and opens and closes by outside heating system described in described solenoid control.
2. concentrating type tobacco floating seed rearing according to claim 1 pond water temperature control system, it is characterized in that: described independent sump water temperature controller obtains temperature information by a plurality of temperature sensors that are arranged in nursery pond and on hot water pipeline, and realize the control to water temperature by magnetic valve described in the temperature information FEEDBACK CONTROL of obtaining and water circulating pump combination action.
3. concentrating type tobacco floating seed rearing according to claim 2 pond water temperature control system, it is characterized in that: described independent sump water temperature controller is provided with control appliance, transceiver and human-computer interaction device, by human-computer interaction device, can independently control the single sump water temperature of growing seedlings, by transceiver, be connected with control bus a plurality of independent sump water temperature controllers and described central control computer are connected to form to concentrating type control system.
4. concentrating type tobacco floating seed rearing according to claim 1 pond water temperature control system, is characterized in that: described control bus adopts RS485 bus.
5. concentrating type tobacco floating seed rearing according to claim 1 pond water temperature control system, it is characterized in that: described central control computer adopts industrial computer, described central control computer communicates by described control bus and independent sump water temperature controller, and independent sump water temperature controller feeds back to described central control computer by the water temperature of nursery pond.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310270337.XA CN103299892B (en) | 2013-07-01 | 2013-07-01 | Cluster-type water temperature control system for floating tobacco seedling growing pond |
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| CN201310270337.XA CN103299892B (en) | 2013-07-01 | 2013-07-01 | Cluster-type water temperature control system for floating tobacco seedling growing pond |
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| CN103299892A CN103299892A (en) | 2013-09-18 |
| CN103299892B true CN103299892B (en) | 2014-12-17 |
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| CN105830896A (en) * | 2016-04-06 | 2016-08-10 | 上海海濯农业科技有限公司 | Temperature control method for water culture device |
| CN107372077B (en) * | 2017-06-30 | 2020-04-17 | 深圳春沐源控股有限公司 | Method and device for controlling temperature of nutrient solution |
| CN110710394B (en) * | 2019-10-25 | 2021-07-30 | 山东大学 | Visual high flux plant cultivation system of root system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BG96052A (en) * | 1992-03-13 | 1996-04-30 | Inst Fiziol Na Rastenijata Aka | Nutritive solution for oriental tobacco growing and method for its application |
| CN102687661A (en) * | 2012-05-23 | 2012-09-26 | 彭细桥 | Tobacco floating-seedling strong seedling cultivation system |
| CN102845264A (en) * | 2012-10-12 | 2013-01-02 | 长沙瑞和数码科技有限公司 | Tobacco floating seedling strong seedling cultivation warming system |
| CN202873442U (en) * | 2012-08-07 | 2013-04-17 | 湖南省烟草公司郴州市公司 | Double-circulation heat supply system for tobacco seedling raising workshop floating tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203378371U (en) * | 2013-07-01 | 2014-01-08 | 湖南农业大学 | Cluster-type nursery pond water temperature control system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BG96052A (en) * | 1992-03-13 | 1996-04-30 | Inst Fiziol Na Rastenijata Aka | Nutritive solution for oriental tobacco growing and method for its application |
| CN102687661A (en) * | 2012-05-23 | 2012-09-26 | 彭细桥 | Tobacco floating-seedling strong seedling cultivation system |
| CN202873442U (en) * | 2012-08-07 | 2013-04-17 | 湖南省烟草公司郴州市公司 | Double-circulation heat supply system for tobacco seedling raising workshop floating tank |
| CN102845264A (en) * | 2012-10-12 | 2013-01-02 | 长沙瑞和数码科技有限公司 | Tobacco floating seedling strong seedling cultivation warming system |
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