DE3143984A1 - Moisture sensing element - Google Patents

Moisture sensing element

Info

Publication number
DE3143984A1
DE3143984A1 DE19813143984 DE3143984A DE3143984A1 DE 3143984 A1 DE3143984 A1 DE 3143984A1 DE 19813143984 DE19813143984 DE 19813143984 DE 3143984 A DE3143984 A DE 3143984A DE 3143984 A1 DE3143984 A1 DE 3143984A1
Authority
DE
Germany
Prior art keywords
electrodes
sensing element
potential difference
pin
moisture
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.)
Withdrawn
Application number
DE19813143984
Other languages
German (de)
Inventor
Norbert Ing. 1020 Wien Weber
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19813143984 priority Critical patent/DE3143984A1/en
Publication of DE3143984A1 publication Critical patent/DE3143984A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/048Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/06Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
    • G01N27/07Construction of measuring vessels; Electrodes therefor

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

Moisture sensing element for electronic moisture monitoring systems with pin-like electrodes (1 and 2) having a potential difference during operation. A signal is triggered by reducing the potential difference as a consequence of the conductive connection between the electrodes. A total of four pin-like electrodes (1 to 4) are provided, which are arranged in the region of the corners of a square printed board (5) and are guided perpendicularly through the latter. Two diagonally opposite electrodes are connected conductively to one another in each case by means of one conductor track (6, 7) each, the two conductor tracks (6, 7) each extending on one side of the printed board (5). <IMAGE>

Description

euchtigkeits-FUhlel ementmoisture-sensing element

Die Erfindung bezieht sich auf ein Feuchtigkeitsfuhlelement für elektronische Feuchtigkeitsüberwachungsanlagen mit zwei betriebsmäßig eine Potentialdifferenz aufweisenden, stiftartigen Elektroden, wobei durch eine Verringerung der Potentialdifferenz zufolge einer leitenden Verbindung zwischen den Elektroden ein Signal auslösbar ist.The invention relates to a moisture sensing element for electronics Moisture monitoring systems with two operationally one potential difference having, pin-like electrodes, whereby by reducing the potential difference A signal can be triggered as a result of a conductive connection between the electrodes is.

Feuchtigkeits-Uberwachungseinrichtungen, die in der angegebenen Weise ausgestaltet sind, werden für verschiedene Zwecke eingesetzt, beispielsweise bei Fahrzeugen zum Zweck der Einschaltung von Scheibenwischern beim Einsetzen von Regen. Hierzu werden kammartige gezahnte Elektroden rer¢endet, die mit ihren Zähnen ineinandergreifen, um eine möglichst lange Grenzlinie zu bilden, längs welcher eine leitende Verbindung zustande kommen kann. Eine andere Ausgestaltung der Elektroden erfordern Feuchtigkeitsüberwachungseinrichtungen, die zur Meldung von Wasseraustritt aus Waschmaschinen oder dergleichen dienen, denn bei diesen kommt es darauf an, daß leitende FeuchtigkeitsbrUcken bei beliebiger Lage des Fühlelementes angezeigt werden. In der GB-PS 1 415 465 ist eine Feuchtigkeitsüberwachungseinrichtung für Erde beschrieben, die zur Auslösung einer Bewässerung bei zu trockener Erde, z.B.Moisture monitoring equipment in the specified manner are designed, are used for various purposes, for example at Vehicles for the purpose of switching on windshield wipers when it rains. For this purpose, comb-like toothed electrodes rer ¢ ends, which mesh with their teeth, to form the longest possible border line along which a conductive connection can come about. Another design of the electrodes requires moisture monitoring devices, which serve to report water leaks from washing machines or the like, because With these it is important that conductive moisture bridges occur at any Position of the sensing element are displayed. In GB-PS 1 415 465 there is a moisture monitoring device described for soil that is used to trigger irrigation when the soil is too dry, e.g.

in Gewächshäusern verwendet wird. Diese Einrichtung ist mit zwei stiftartigen Elektroden ausgestattet, die in das Erdreich eingesteckt werden und mit deren Hilfe der feuchtigkeitsabhängige Erdwiderstand ermittelt wird.used in greenhouses. This device has two pen-type Equipped with electrodes that are inserted into the ground and with their help the moisture-dependent earth resistance is determined.

Die Erfindung hat sich die Aufgabe gestellt, ein FUhlelement für Feuchtigkeitsüberwachungseinrichtungen zu schaffen, das leitende Feuchtigkeitsbrücken in beliebigen Lagen anzuzeigen imstande ist und erzielt dies dadurch, daß zwei weitere stiftartige Elektroden vorgesehen sind, wobei die insgesamt vier Elektroden im Bereich der Ecken einer quadratischen Leiterplatte angeordnet und senkrecht durch diese hindurchgeführt sind, und daß jeweils zwei einander diagonal gegenüberliegende Elektroden durch je eine Leiterbahn elektrisch leitend miteinander verbunden sind, wobei die beiden Leiterbahnen auf je einer Seite der Leiterplatte verlaufen.The object of the invention is to provide a sensing element for moisture monitoring devices to create the ability to display conductive moisture bridges in any position is and achieves this in that two further pen-like electrodes are provided are, the total of four electrodes in the area of the corners of a square Printed circuit board are arranged and passed vertically through this, and that two diagonally opposite electrodes each through a conductor track are electrically connected to each other, the two conductor tracks on each side of the circuit board run.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Mit 1, 2, 3 und 4 sind an ihren Enden spitz zulaufende Elektrodenstifte bezeichnet, die an den Ecken einer zumindest angenähert quadratischen Leiterplatte 5 senkrecht durch diese hindurchgesteckt sind. Die Elektrodenstifte 1 und 3 sind mittels einer unterhalb der Leiterplatte 5 angeordneten Leiterbahn 6 miteinander verbunden, während mit 7 eine die Elektrodenstifte 2 und 4 trerbindende Leiterbahn bezeichnet ist. Zufolge des Umstandes, daß die Leiterbahnen 6 und 7 jeweils diagonal gegenUberstehende Elektrodenstifte verbinden, ist gewährleistet, daß jeweils benachbarte Elektrodenstifte unterschiedliche Potentiale aufweisen und die Wahrscheinlichkeit des Zustandekommens von Feuchtigkeitsbrücken zwischen Elektroden verschiedener Potentiale erhöht ist. Die zum Uberwachungsgerät führenden Zuleitungsdrähte 8,9 sind an die Leiterbahnen 6 bzw. 7 angeschlossen, z.B. durch Verlötung.An embodiment of the invention is shown in the drawing. With 1, 2, 3 and 4 tapering electrode pins are designated at their ends, those at the corners of an at least approximately square printed circuit board 5 perpendicular are inserted through this. The electrode pins 1 and 3 are by means of a below the printed circuit board 5 arranged conductor track 6 connected to each other, while 7 with a conductor path which connects the electrode pins 2 and 4 is designated. As a result of the fact that the conductor tracks 6 and 7 are each diagonally opposite Connect electrode pins, it is ensured that each adjacent electrode pins have different potentials and the probability of their occurrence moisture bridges between electrodes of different potentials is increased. The lead wires 8, 9 leading to the monitoring device are connected to the conductor tracks 6 or 7 connected, e.g. by soldering.

Durch die wechselweise Anordnung der Elektroden wird gewährleistet, daß diese auch bei Schrägstellung des Sensors den Boden sicher berühren. Ferner kann nach Beheben der Bodenfeuchtigkeit auch der Sensor leicht abgetrocknet und damit wieder betriebsbereit gemacht werden. LeerseiteThe alternating arrangement of the electrodes ensures that they touch the ground safely even if the sensor is tilted. Further After eliminating the moisture in the ground, the sensor can also be slightly dried off and can thus be made ready for operation again. Blank page

Claims (1)

PatentansDruch: Feuchtigkeits-Fühlelement für elektronische Feuchtigkeitsüberwachungsanlagen mit zwei betriebsmäßig eine Potentialdifferenz aufweisenden, stiftartigen Elektroden, wobei durch eine Verringerung der Potentialdifferenz infolge einer leitenden Verbindung zwischen den Elektroden ein Signal auslösbar ist, d a d u r c h g e k e n n z e i c h n e t, daß zwei weitere stiftartige Elektroden (3,4) vorgesehen sind, wobei die insgesamt vier Elektroden (1 bis 4) im Bereich der Ecken einer quadratischen Leiterplatte (5) angeordnet und senkrecht durch diese hindurchgefUhrt sind, und daß jeweils zwei einander diagonal gegenüberliegende Elektroden durch je eine Leiterbahn (6,7) elektrisch leitend miteinander verbunden sind, wobei die beiden Leiterbahnen (6,7) auf je einer Seite der Leiterplatte (5) verlaufen.Patent claim: Humidity sensing element for electronic humidity monitoring systems with two pin-type electrodes that are operationally a potential difference, whereby by a reduction in the potential difference due to a conductive connection A signal can be triggered between the electrodes, which means that there is no such thing i c h n e t that two further pin-like electrodes (3, 4) are provided, with the total of four electrodes (1 to 4) in the area of the corners of a square Printed circuit board (5) are arranged and vertically passed through it, and that in each case two diagonally opposite electrodes through one conductor track each (6,7) are connected to one another in an electrically conductive manner, the two conductor tracks (6,7) run on each side of the circuit board (5).
DE19813143984 1981-11-05 1981-11-05 Moisture sensing element Withdrawn DE3143984A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19813143984 DE3143984A1 (en) 1981-11-05 1981-11-05 Moisture sensing element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813143984 DE3143984A1 (en) 1981-11-05 1981-11-05 Moisture sensing element

Publications (1)

Publication Number Publication Date
DE3143984A1 true DE3143984A1 (en) 1983-05-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813143984 Withdrawn DE3143984A1 (en) 1981-11-05 1981-11-05 Moisture sensing element

Country Status (1)

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DE (1) DE3143984A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937599A1 (en) * 1989-11-11 1991-05-16 Bodenseewerk Perkin Elmer Co DOUBLE MONOCHROMATOR
DE102019126182A1 (en) * 2019-09-27 2021-04-01 Peppercon Gmbh Liquid sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937599A1 (en) * 1989-11-11 1991-05-16 Bodenseewerk Perkin Elmer Co DOUBLE MONOCHROMATOR
DE3937599C2 (en) * 1989-11-11 2002-01-24 Perkin Elmer Bodenseewerk Zwei double monochromator
DE102019126182A1 (en) * 2019-09-27 2021-04-01 Peppercon Gmbh Liquid sensor

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