DE2618540A1 - Electronic regulation of irrigation system - using low press. induced in tube for switching supply with timed venting of tube - Google Patents

Electronic regulation of irrigation system - using low press. induced in tube for switching supply with timed venting of tube

Info

Publication number
DE2618540A1
DE2618540A1 DE19762618540 DE2618540A DE2618540A1 DE 2618540 A1 DE2618540 A1 DE 2618540A1 DE 19762618540 DE19762618540 DE 19762618540 DE 2618540 A DE2618540 A DE 2618540A DE 2618540 A1 DE2618540 A1 DE 2618540A1
Authority
DE
Germany
Prior art keywords
tube
irrigation
tensiometer
electronic regulation
subclaim
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE19762618540
Other languages
German (de)
Inventor
Klaus Schweigmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wed Elektronik & Datentechnik
Original Assignee
Wed Elektronik & Datentechnik
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wed Elektronik & Datentechnik filed Critical Wed Elektronik & Datentechnik
Priority to DE19762618540 priority Critical patent/DE2618540A1/en
Publication of DE2618540A1 publication Critical patent/DE2618540A1/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • A01G25/16—Control of watering
    • A01G25/167—Control by humidity of the soil itself or of devices simulating soil or of the atmosphere; Soil humidity sensors
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D22/00—Control of humidity
    • G05D22/02—Control of humidity characterised by the use of electric means

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Soil Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental Sciences (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

Automatic irrigation of agricultural ground is affected by monitoring the moisture level using a ceramic cell and using the low pressure in a tube to switch a contact. The ceramic cell (3) is located on the end of a long tube (7) coupled to a water container over a valve (5). When the pressure falls, due to the ground drying, a relay (4) is switched to open the valve. any air bubbles in the tube are passed through to the water tank. This process is repeated periodically under the control of a timer.

Description

Titel: Elektronische Regelung für BewässerungenTitle: Electronic control for irrigation

über Tensiometer, vorzugsweise in Gartenbau und Landwirtschaft. via tensiometer, preferably in horticulture and agriculture.

Stand der Technik: Als Regelung für Bewässerung sind Systeme bekannt, die von der änderung der elektrischen Leitfähigkeit, der elektrischen Kapazität und der Kapillarspannung ausgehen.State of the art: Systems are known as control systems for irrigation, that of the change in electrical conductivity, electrical capacitance and run out of capillary tension.

Kritik des Standes Bei Systemen, die auf der elektrischen Leitder Technik: fähigkeit des Bodens aufbauen, zeigt sich der Nachteil, daß mehrere Male pro Jahr die Sollwerte nachgestellt werden müssen, da sich der Salzgehalt des Bodens durch Düngung bzw. Auswaschung infolge Regen oder Bewässerung verändert.Criticism of the status With systems based on the electrical conductor Technique: ability of the soil to build up, the disadvantage shows that several times per year the target values have to be readjusted, since the salinity of the soil changed by fertilization or leaching due to rain or irrigation.

Die Kapazitätsmesseng unterliegt starken Störfaktoren, so daß eine genaue Regelung über längere Zeiträume nicht möglich ist. The capacitance measurement is subject to strong disruptive factors, so that a precise regulation over longer periods of time is not possible.

(Bei Benetzung des Fühlers ändern sich die Istwerte sehr stark, obgleich keine Änderung im Boden vorliegt.) Die Kapillarspannung erscheint als brauchbarste Grundlage zur Feuchtemessung. Sie hat bislang den Nachteil, daß sich im Laufe der Zeit kleine Luftblasen im Meßsystem bilden, die die Messung beeinflussen und ungenau bzw. als nicht wartungsfrei werden lassen, Aufgabe: Aufgabe der Erfindung ist es, ein wartungsfreies Re gelungs system zu bieten, um den Pflanzen optimale Feuchtigkeitsverhältnisse zu schaffen. (If the sensor is wetted, the actual values change very strongly, although there is no change in the soil.) The capillary tension appears to be the most useful Basis for moisture measurement. So far it has the disadvantage that in the course of the Time small air bubbles form in the measuring system, which influence the measurement and are inaccurate or as not to be maintenance-free, Task: The task of the invention is to To offer a maintenance-free control system to give the plants optimal moisture conditions to accomplish.

Lösung Ausgehend vom bekannten Tensiometer, welches aus einer mit Wasser gefüllten Zelle mit keramischer Übergangs schicht besteht, wurde ein Fühlersystem entwickelt, welches den entstehenden Unterdruck auf ein Kontaktmanometer bzw. Differenzdruckschalter wirken läßt. über eine elektronische Steuerung werden ein oder mehrere Fühler abgefragt und für bestimmte, einstellbare Zeiten zur Ansteuerung von Wasserventilen benutzt. Die auftretenden Luftblasen werden in regelmäßigen, einstellbaren Zeitabständen durch öffnen eines Magnetventiles aus dem System gelassen, wobei automatisch der entweichende Luftraum mit Wasser nachgefüllt wird.Solution Based on the well-known tensiometer, which consists of a Water-filled cell with a ceramic transition layer, became developed a sensor system, which applies the resulting negative pressure to a contact manometer or differential pressure switch can act. via an electronic control one or more sensors queried and controlled for specific, adjustable times used by water valves. The air bubbles that appear are regularly adjustable time intervals by opening a solenoid valve left out of the system, the escaping air space is automatically refilled with water.

Durch dieses System läßt sich der von der jeweiligen Pflanzenkultur benötigte Wasser bedarf genau einstellen. Through this system the of the respective plant culture Set the required water exactly.

Erzielbare Vorteile: Die mit der Erfindung erzielten Vorteile bestehen darin, daß durch die Optimierung des Wasserverbrauches beträchtliche Wassereinsparungen erreicht werden. Durch den wartungsfreien Betrieb beschränkt sich die Pflege der Anlage auf gelegentliches Reinigen.Achievable Advantages: The advantages achieved with the invention exist in that by optimizing the water consumption considerable water savings can be achieved. Maintenance-free operation means that the maintenance of the System for occasional cleaning.

Beschreibung eines Auf eine T-Schiene 1, die als Träger der Anwendungsbeispiels: Geräte und als Bodenspieß dient, sind über mechanische Stützen 2, die keramische Zelle 3, der Druckschalter 4, das Entlüftungsventil 5 und der Wasserbehälter 6 montiert, Die Teile 3 bis 6 sind durch Verbindungsrohre 7 verbunden. Die keramische Zelle 3 wird so weit im Boden versenkt, wie die Wurzellage der jeweiligen Pflanzenkultur bzw. Pflanze es erfordert. Durch Einschlämmen wird der innige Kontakt mit dem Boden hergestellt.Description of a on a T-rail 1, which is used as a carrier of the application example: Devices and serving as a ground spike are on mechanical supports 2, the ceramic Cell 3, the pressure switch 4, the vent valve 5 and the water tank 6 installed, The parts 3 to 6 are connected by connecting pipes 7. The ceramic cell 3 is sunk into the ground as far as the root layer of the respective plant culture or plant it requires. Sludging creates intimate contact with the ground manufactured.

Beim Trocknen des Bodens tritt nun die kapillare Saugspannung auf, die das Wasser aus der Zelle 3 heraussaugt. Über das Verbindungsrohr 7 wird der Unterdruck über tragen und wirkt auf den Druckschalter 4. When the floor dries, the capillary suction tension occurs, which sucks the water out of cell 3. About the connecting pipe 7 is the Transfer negative pressure and acts on pressure switch 4.

Die auftretenden Luftblasen werden über das Ventil 5 in den Wasserbehälter 6 gelassen, wobei Wasser in das Rohr 7 nachläuft. The air bubbles that occur are drawn into the water tank via valve 5 6 left, with water running into the pipe 7.

L e e r s e i t eL e r s e i t e

Claims (1)

Patentansprüche.Claims. Oberbegriff: 0£ Elektronische Regelung für Bewässerungen über Tensiometer, vorzugsweise in Gartenbau und Landwirtschaft, Kennzeichnender Teil: dadurch gekennzeichnet, daß ein Tensiometer mit einem Magnetventil und Wasserbehälter versehen wurde, um Luftblasen gegen nachfließendes Wasser austauschen zu können.Generic term: £ 0 Electronic control for irrigation via tensiometer, preferably in horticulture and agriculture, identifying part: characterized, that a tensiometer was provided with a solenoid valve and water tank to To be able to exchange air bubbles for flowing water. Oberbegriff des 2. Elektronische Regelung für Bewässerungen Unteranspruches: über Tensiometer nach Anspruch 1, Kennzeichnender Teil dadurch gekennzeichnet, daß der Austausch des Unteranspruches: der Luftblasen automatisch in beliebig einstellbaren Zeitabständen über eine elektronische Steuerung erfolgt.General term of the 2nd electronic regulation for irrigation subclaim: Via tensiometer according to claim 1, characterizing part characterized in that the exchange of the dependent claim: the air bubbles automatically in any adjustable Time intervals via an electronic control. Oberbegriff des 3r.Elektronische Regelung für Bewässerungen Unteranspruches: über Tensiometer nach Anspruch 1 und 2, Kennzeichnender Teil dadurch gekennzeichnet, daß Beregnungszeit des Unteranspruches: und Versickerzeit unabhängig von einander frei einstellbar sind.Generic term of the 3rd electronic regulation for irrigation subclaim: Via tensiometer according to claims 1 and 2, characterizing part characterized in that that irrigation time of the dependent claim: and infiltration time independent of each other are freely adjustable. Oberbegriff des 4. Elektronische Regelung für Bewässerungen Unteranspruches: über Tensiometer nach Anspruch 1 bis 3, Kennzeichnender Teil dadurch gekennzeichnet, daß am Ende des Meßdes Unteranspruches: bereiches ein Kontakt vorhanden ist, der bei ungewollter Trockenheit (Wasserausfall) das Meßsystem vor zu großem Unterdruck schützt.Generic term of the 4th electronic regulation for irrigation subclaim: Via tensiometer according to claims 1 to 3, characterizing part characterized in that that at the end of the measurement of the dependent claim: area there is a contact that in the event of unintentional dryness (water failure), protect the measuring system from excessive negative pressure protects. Eine Überlastung wird durch öffnen des Entlüftungsventils verhindert. Overloading is prevented by opening the vent valve.
DE19762618540 1976-04-28 1976-04-28 Electronic regulation of irrigation system - using low press. induced in tube for switching supply with timed venting of tube Pending DE2618540A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762618540 DE2618540A1 (en) 1976-04-28 1976-04-28 Electronic regulation of irrigation system - using low press. induced in tube for switching supply with timed venting of tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762618540 DE2618540A1 (en) 1976-04-28 1976-04-28 Electronic regulation of irrigation system - using low press. induced in tube for switching supply with timed venting of tube

Publications (1)

Publication Number Publication Date
DE2618540A1 true DE2618540A1 (en) 1977-11-10

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076014A1 (en) * 1981-09-28 1983-04-06 Dwight J. Busalacchi Irrigation control system
EP0305614A1 (en) * 1981-11-02 1989-03-08 Larry Cameron Automatic control apparatus and method for sprinkling water over a predetermined area
DE3911151A1 (en) * 1989-04-06 1990-10-11 Joachim Schmidt Measuring device for determining soil properties
DE4025690A1 (en) * 1990-08-14 1992-02-20 Gardena Kress & Kastner Gmbh IRRIGATION CONTROL DEVICE
DE4308720A1 (en) * 1993-03-15 1994-09-22 Toelle Rainer Dr Agr Measuring device for determining soil properties
DE19616391A1 (en) * 1995-04-28 1996-11-21 Georg Von Unold Tensiometer used to measure water tension in soils
EP0855135A2 (en) 1997-01-28 1998-07-29 Gerald Rolfe Irrigation control
DE10047937C1 (en) * 2000-09-27 2002-04-11 Ums Umweltanalytische Mess Sys Determining ground water tension involves optical scanning of porous hydrophilic material to detect changes in reflection characteristics caused by varying ground water tension
DE102007029254A1 (en) 2007-06-13 2008-12-18 Klaus Spohrer Irrigation device, has signal device with auxiliary valve, which is actuated between substratum wetness sensing unit and regulating valve for controlling regulating valve using fluidic control medium

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076014A1 (en) * 1981-09-28 1983-04-06 Dwight J. Busalacchi Irrigation control system
EP0305614A1 (en) * 1981-11-02 1989-03-08 Larry Cameron Automatic control apparatus and method for sprinkling water over a predetermined area
DE3911151A1 (en) * 1989-04-06 1990-10-11 Joachim Schmidt Measuring device for determining soil properties
DE4025690A1 (en) * 1990-08-14 1992-02-20 Gardena Kress & Kastner Gmbh IRRIGATION CONTROL DEVICE
US5224795A (en) * 1990-08-14 1993-07-06 Gardena Kress & Kastner Gmbh Irrigation regulator
DE4308720A1 (en) * 1993-03-15 1994-09-22 Toelle Rainer Dr Agr Measuring device for determining soil properties
DE19616391A1 (en) * 1995-04-28 1996-11-21 Georg Von Unold Tensiometer used to measure water tension in soils
DE19616391C2 (en) * 1995-04-28 1999-04-22 Georg Von Unold Tensiometer with measured value monitoring and automatic refilling
EP0855135A2 (en) 1997-01-28 1998-07-29 Gerald Rolfe Irrigation control
DE10047937C1 (en) * 2000-09-27 2002-04-11 Ums Umweltanalytische Mess Sys Determining ground water tension involves optical scanning of porous hydrophilic material to detect changes in reflection characteristics caused by varying ground water tension
DE102007029254A1 (en) 2007-06-13 2008-12-18 Klaus Spohrer Irrigation device, has signal device with auxiliary valve, which is actuated between substratum wetness sensing unit and regulating valve for controlling regulating valve using fluidic control medium

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