CN103875509A - Negative pressure irrigation system and method - Google Patents
Negative pressure irrigation system and method Download PDFInfo
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- CN103875509A CN103875509A CN201410072079.9A CN201410072079A CN103875509A CN 103875509 A CN103875509 A CN 103875509A CN 201410072079 A CN201410072079 A CN 201410072079A CN 103875509 A CN103875509 A CN 103875509A
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Abstract
The invention relates to a negative pressure irrigation system and method. The system comprises a negative pressure underground irrigation device and a negative pressure regulator. The negative pressure underground irrigation device irrigates crops under the action of negative pressure. The negative pressure regulator automatically regulates negative pressure of the system. A soil humidity sensor is used for monitoring water content of soil in real time, the real-time soil water content and expert's information about current actual water demand of crops are combined in a controller, and an optimal irrigation strategy is formulated. A step motor is driven for direction and speed regulation according to the optimal irrigation strategy, vertical position of a lift table is controlled, the position of a water supply unit can be regulated, water supply suction of the system is dynamically regulated, and accordingly the soil water content is dynamically regulated so as to truly supply water according to demands of the crops.
Description
Technical field
The present invention relates to a kind of Negative pressure irrigation system and method thereof, especially relate to can auto-control negative pressure subirrigation system and method thereof.
Background technology
Negative pressure subsurface irrigation technology is the initiatively irrigation technique of a kind of novel water-saving proposing for greenhouse pot culture crop.This technology in basin bottom, is utilized crop water physiological property and soil suction characteristic by buried irrigator, makes moisture in irrigator automatically infiltrate soil, thereby in water-supply-pipe, forms negative pressure.Under atmospheric effect, water is pressed into water-supply-pipe from water-feed and supplements the moisture that flows into soil irrigator, thereby ensures that whole system moves incessantly, realizes crop to the continuous automatic acquisition of moisture, and passive irrigation is become initiatively and irrigated.In Negative pressure irrigation system, the horizontal plane depth displacement between water-feed and irrigator has determined the water suction force that supplies of negative pressure subirrigation system.
In prior art, substantially immobilize for water suction force, this has caused following problem: (1) crop is the demand difference to moisture at different vegetative stages, but existing Negative pressure irrigation system can not be supplied with according to the demand of crop the water supply of crop, so both do not reach best irrigation effect, also cause the low of water use efficiency, caused the waste of water resource; (2) Negative pressure irrigation systems are only applicable to one or the similar several crops of habit, can not be widely used in various crops, in the time that other crops adopt this irrigation system, also need to make improvements to adapt to the demand of Different Crop, work loaded down with trivial details, inefficiency, has also caused the rising of expense simultaneously.
Summary of the invention
For addressing the above problem, the present invention proposes to utilize water content in soil humidity sensor Real-Time Monitoring soil, in controller, real-time soil moisture content is combined with the expert info of the current actual water requirement of crop, formulates optimal irrigation decision-making.According to turning to and rotating speed of optimal irrigation decision-making Driving Stepping Motor, the upright position of control lifting platform, adjusts water-feed position, thereby realizes the water suction force that supplies of dynamically adjusting negative pressure subirrigation system, and then realize and dynamically adjust soil moisture content, really to realize by the required water supply of crop.
The invention provides a kind of negative pressure subirrigation system, it comprises negative pressure subsurface irrigation device, and negative pressure subsurface irrigation device is irrigated crop under suction function.
Further, described negative pressure subsurface irrigation device comprises the two connecting tube of water-feed, irrigator and connection, water-feed is positioned on the ground, irrigator is in underground, in water-feed, store for the water of irrigating, be connected to irrigator by connecting tube, under suction function, water flows to irrigator by water-feed through connecting tube, realizes crop irrigation.
Further, described negative pressure subirrigation system also comprises negative pressure adjusting device, negative pressure adjusting device automatically adjusts to the negative pressure of described negative pressure subirrigation system, described negative pressure adjusting device comprises soil humidity sensor, controller, saddle and saddle height adjuster, soil humidity sensor is surveyed soil moisture, transmit moisture signal to controller, controller comprises memory, in memory, store plant growth expert system, controller is compared the soil humidity information of its acquisition with the crop desired moisture level information in expert system, draw irrigation strategy, controller is given an order to saddle height adjuster according to irrigation strategy, saddle height adjuster regulates saddle height, water-feed is installed on saddle, water-feed height changes with the height change of saddle, thereby cause negative pressure variation, thereby regulate for water suction force, described saddle height adjuster comprises lower bottom base, upper mounting plate, guide rail, stepper motor, ball-screw, shaft coupling, saddle and motor mounting blocks, stepper motor is installed on motor mounting blocks, motor mounting blocks is Jiong shape, bottom is connected with upper mounting plate, shaft coupling is between upper mounting plate and motor mounting blocks, stepper motor drives ball-screw to rotate by shaft coupling, the ball-screw other end is rotatable to be installed on base, in the both sides that are parallel to ball-screw and are positioned at ball-screw, guide rail is set, guide rail one end is installed on base, the other end is connected in upper mounting plate, saddle is driven and slides up and down along guide rail by ball-screw, the water-feed that drive is placed on saddle moves up and down, thereby regulate the negative pressure of irrigation system.
The present invention also provides a kind of negative pressure subsurface irrigation method that can auto-control for water suction force, and it has adopted above-mentioned negative pressure subirrigation system, and the method comprises the steps:
(1) detection steps, obtains the humidity of soil by soil humidity sensor;
(2) comparison step, utilizes controller that the corresponding data of the soil moisture of obtaining and expert system storage is compared;
(3) calculation procedure, controller, according to comparative result, draws irrigation strategy, draws required negative pressure according to irrigation strategy, calculates saddle height from required depressimeter;
(4) execution step, adjusts saddle height to draw correct negative pressure, thereby regulates for water suction force.
The present invention can need to supply water according to crop, realizes intelligent irrigation, and realizing an irrigation system can corresponding various crop, has improved water-use efficiency and irrigation efficiency, has saved cost, have economy, intelligence, stable, be convenient to safeguard and the beneficial effect such as popularization.
Brief description of the drawings:
Fig. 1 be the present invention can auto-control for water suction force the schematic diagram of negative pressure subirrigation system
Fig. 2 is saddle height adjuster and saddle schematic diagram
1 soil humidity sensor, 2 cultivating soil casees, 3 irrigators, 4 controllers, 5 stepper motors, 6 water-feeds, 7 saddle height adjusters, 8 motor mounting blocks, 9 shaft couplings, 10 nuts, 11 saddles, 12 ball-screws, 13 guide rails
Embodiment
For making the invention process object, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment.
With reference to accompanying drawing 1-2, introduce building for the negative pressure subirrigation system of water suction force auto-control.
First the water-feed of negative pressure subirrigation system 6 is placed on lifting platform.Soil humidity sensor 1 is positioned in cultivating soil case 2, connects controller 4.The output of controller 4 connects stepper motor 5.Stepper motor 5 output shafts connect saddle height adjuster 7.Saddle height adjuster mainly adopts ball screw arrangement, and saddle 11 is installed on ball-screw 12, can adjust the position of saddle 11 on ball-screw 12 by swing roller leading screw 12.Irrigator 3 is installed on cultivating soil case bottom, is communicated with water-feed 6 by connecting tube.
While work for the negative pressure subirrigation system of water suction force auto-control, soil humidity sensor 1 is surveyed the humidity of soil, the data of detection are sent to controller 4, controller 4 compares corresponding data in the expert system of storing in the soil moisture data of obtaining and its memory, draw irrigation strategy, in the time that the two is consistent, saddle height is not changed, in the time that existing humidity and soil should have humidity inconsistent, according to the difference of the two, in conjunction with the expert info of crop water, obtain irrigating negative pressure value, and draw the height of water-feed 6 by irrigating negative pressure value, give an order to saddle height adjuster 7, saddle height adjuster 7 regulates saddle height according to the order of controller 4, make water-feed 6 reach corresponding height so that the negative pressure value of science to be provided, thereby effectively crop is irrigated.
Controller control program specific embodiment:
Realization of the present invention depends on the confession water suction force control algolithm of controller 4.This control algolithm is output as input, expert info in conjunction with crop water with the pulse of soil humidity sensor 1, formulates the irrigation strategy of crop water.The control command of irrigation strategy is embodied in size and the direction of the pulse signal of output control step motor 5.Stepper motor 5 forwards drive ball-screw 12 forwards, and saddle 11 rises, and increase for water suction force; Stepper motor 5 reversions drive ball-screw 12 to reverse, and saddle 11 declines, and reduce for water suction force, realize for water suction force auto-control.
Adopt said system, the process that crop is irrigated is following steps:
(1) detection steps, obtains the humidity of soil by soil humidity sensor;
(2) comparison step, utilizes controller that the corresponding data of the soil moisture of obtaining and expert system storage is compared;
(3) calculation procedure, controller, according to comparative result, draws irrigation strategy, draws required negative pressure according to irrigation strategy, calculates saddle height from required depressimeter;
(4) execution step, adjusts saddle height to draw correct negative pressure, thereby regulates for water suction force.
Utilize apparatus and method disclosed by the invention can realize the water suction force that supplies of auto-control negative pressure subirrigation system, real realization poured water by plant actual demand, establish practical basis for further improving soil water utilization rate, also for the automation of irrigation system provides new thinking.
Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Claims (4)
1. a negative pressure subirrigation system, it comprises negative pressure subsurface irrigation device, negative pressure subsurface irrigation device is irrigated crop under suction function.
2. system according to claim 1, is characterized in that:
Described negative pressure subsurface irrigation device comprises the two connecting tube of water-feed, irrigator and connection, water-feed is positioned on the ground, irrigator is in underground, in water-feed, store the water that irrigation is provided, be connected to irrigator by connecting tube, under suction function, water flows to irrigator by water-feed through connecting tube, realizes crop irrigation.
3. system according to claim 2, is characterized in that:
Described negative pressure subirrigation system also comprises negative pressure adjusting device, negative pressure adjusting device automatically adjusts to the negative pressure of described negative pressure subirrigation system, described negative pressure adjusting device comprises soil humidity sensor, controller, saddle and saddle height adjuster, soil humidity sensor is surveyed soil moisture, transmit moisture signal to controller, controller comprises memory, in memory, store plant growth expert system, controller is compared the soil humidity information of its acquisition with the crop desired moisture level information in expert system, draw irrigation strategy, controller is given an order to saddle height adjuster according to irrigation strategy, saddle height adjuster regulates saddle height, water-feed is installed on saddle, water-feed height changes with the height change of saddle, thereby cause negative pressure variation, thereby regulate for water suction force.
Described saddle height adjuster comprises lower bottom base, upper mounting plate, guide rail, stepper motor, ball-screw, shaft coupling, saddle and motor mounting blocks, stepper motor is installed on motor mounting blocks, motor mounting blocks is Jiong shape, bottom is connected with upper mounting plate, shaft coupling is between upper mounting plate and motor mounting blocks, stepper motor drives ball-screw to rotate by shaft coupling, the ball-screw other end is rotatable to be installed on base, in the both sides that are parallel to ball-screw and are positioned at ball-screw, guide rail is set, guide rail one end is installed on base, the other end is connected in upper mounting plate, saddle is driven and slides up and down along guide rail by ball-screw, the water-feed that drive is placed on saddle moves up and down, thereby regulate the negative pressure of irrigation system.
4. a negative pressure subsurface irrigation method that can auto-control for water suction force, it adopts negative pressure subirrigation system claimed in claim 3, and the method comprises the steps:
(1) detection steps, obtains the humidity of soil by soil humidity sensor;
(2) comparison step, utilizes controller that the corresponding data of the soil moisture of obtaining and expert system storage is compared;
(3) calculation procedure, controller, according to comparative result, draws irrigation strategy, draws required negative pressure according to irrigation strategy, calculates saddle height from required depressimeter;
(4) execution step, adjusts saddle height to draw correct negative pressure, thereby regulates for water suction force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410072079.9A CN103875509A (en) | 2014-02-28 | 2014-02-28 | Negative pressure irrigation system and method |
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| CN201410072079.9A CN103875509A (en) | 2014-02-28 | 2014-02-28 | Negative pressure irrigation system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104737883A (en) * | 2015-04-17 | 2015-07-01 | 湖南农业大学 | Movable negative pressure irrigating system and method for oil-tea camellia stand |
| CN105191754A (en) * | 2015-10-09 | 2015-12-30 | 潍坊友容实业有限公司 | Height adjustable type micro-jet irrigation system |
| CN108513896A (en) * | 2018-03-13 | 2018-09-11 | 中国农业科学院农业资源与农业区划研究所 | A kind of system for realizing positive pressure and Negative pressure irrigation |
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| CN103053384A (en) * | 2013-01-04 | 2013-04-24 | 张振华 | Pressure adjustable type subsurface irrigation system |
| DE102012001688A1 (en) * | 2012-01-24 | 2013-07-25 | Shaoying Wang | Low pressure vessel for automatic irrigation of plants in flower pot used in e.g. home, has vessel main portion, lid, air inlet pipe and draining portion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2233788A1 (en) * | 1998-06-02 | 1999-12-02 | Shaoying Wang | Water supplier pot with doubled wall |
| CN1198500C (en) * | 2001-10-10 | 2005-04-27 | 雷廷武 | New type irrigation method and its irrigation system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104737883A (en) * | 2015-04-17 | 2015-07-01 | 湖南农业大学 | Movable negative pressure irrigating system and method for oil-tea camellia stand |
| CN105191754A (en) * | 2015-10-09 | 2015-12-30 | 潍坊友容实业有限公司 | Height adjustable type micro-jet irrigation system |
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| CN108513896A (en) * | 2018-03-13 | 2018-09-11 | 中国农业科学院农业资源与农业区划研究所 | A kind of system for realizing positive pressure and Negative pressure irrigation |
| CN108513896B (en) * | 2018-03-13 | 2021-03-26 | 中国农业科学院农业资源与农业区划研究所 | System for realize malleation and negative pressure irrigation |
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Application publication date: 20140625 |