EP0395085B1 - Verfahren zur Entfeuchtung von Mauerwerk durch Elektroosmose mittels elektromagnetischer Bestrahlung und elektronisches Gerät zur Durchführung des Verfahrens - Google Patents

Verfahren zur Entfeuchtung von Mauerwerk durch Elektroosmose mittels elektromagnetischer Bestrahlung und elektronisches Gerät zur Durchführung des Verfahrens Download PDF

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Publication number
EP0395085B1
EP0395085B1 EP90108059A EP90108059A EP0395085B1 EP 0395085 B1 EP0395085 B1 EP 0395085B1 EP 90108059 A EP90108059 A EP 90108059A EP 90108059 A EP90108059 A EP 90108059A EP 0395085 B1 EP0395085 B1 EP 0395085B1
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EP
European Patent Office
Prior art keywords
resonator
oscillation
pulse
pulse sequence
sequence signal
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.)
Expired - Lifetime
Application number
EP90108059A
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German (de)
English (en)
French (fr)
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EP0395085A1 (de
Inventor
Hans-Peter Coufal
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Zoller Ernst
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Zoller Ernst
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Publication date
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/70—Drying or keeping dry, e.g. by air vents
    • E04B1/7007—Drying or keeping dry, e.g. by air vents by using electricity, e.g. electro-osmosis

Definitions

  • the invention relates to a method for dehumidifying masonry, in which the masonry is exposed to electromagnetic radiation generated by an electromagnetic resonator and emitted by a radiation device, the resonator for generating the electromagnetic radiation with periodic electrical pulses having a pulse repetition frequency lower than the natural oscillation frequency of the resonator to electromagnetic natural vibrations.
  • the invention further relates to an electronic device for dehumidifying masonry, with an electromagnetic resonator, in particular an LC resonant circuit, with a pulse generator circuit connected to the resonator, which, to excite natural vibrations of the resonator, have periodic pulses with steep pulse edges and with a pulse repetition frequency lower than the natural vibration frequency of the resonator, and with a device for emitting electromagnetic waves generated by the vibrations of the resonator.
  • an electromagnetic resonator in particular an LC resonant circuit
  • a pulse generator circuit connected to the resonator, which, to excite natural vibrations of the resonator, have periodic pulses with steep pulse edges and with a pulse repetition frequency lower than the natural vibration frequency of the resonator, and with a device for emitting electromagnetic waves generated by the vibrations of the resonator.
  • Field of application of the invention is the dehumidification of masonry, the moisture of which stems in particular from rising damp, such as, for example, due to capillary, osmotic or other electrokinetic effects penetrating into the masonry and rising therein groundwater, backwater or leachate.
  • electro-osmosis processes work on the basis of moisture control with electric fields. With these methods, the electric field is created by means of electrodes embedded in the masonry and in the ground. For the correct placement and attachment of the electrodes, however, considerable structural interventions in the masonry are generally required.
  • Another disadvantage of the known electro-osmosis processes is that the electrodes oxidize or corrode over time and thus have only a limited service life.
  • dehumidification of masonry can also be achieved without electrodes embedded in the masonry if electromagnetic radiation is allowed to act on the moist masonry.
  • An electronic device of the type mentioned at the outset which works according to this principle is known from the Austrian patent application 2398/86.
  • the known device comprises an L-C resonant circuit which is excited to resonate by a pulse generator circuit.
  • the natural oscillation frequency or resonance frequency of the resonant circuit is a multiple of the pulse repetition frequency of the pulse generator.
  • the pulse repetition frequency of the pulse generator is adapted to the fluctuation frequency of the electromagnetic earth field and is 7 to 15 pulses per second.
  • the resonance oscillation of the oscillating circuit is maintained for a certain duration with constant power during each oscillation-stimulating pulse.
  • An antenna connected to the resonant circuit via a coupling capacitor radiates electromagnetic wave trains generated in the resonant circuit with an essentially constant amplitude per wave train in time with the vibration-stimulating pulses.
  • the known electronic device requires a comparatively large amount of circuitry for the generation of the frequency-coordinated pulse sequence signal for the electromagnetic earth field, for which Maintaining a substantially constant amplitude of the resonance oscillation of the resonant circuit and for the temporal limitation of the oscillation trains within a period of the excitation pulse signal.
  • the object of the invention is to provide an efficient, non-destructive method for dehumidifying masonry which can be carried out using simple means.
  • a resonator is used to generate the electromagnetic radiation which, after each excitation by the pulse train signal, carries out a damped oscillation, the amplitude of which during a period of half a period of the pulse train signal to a value less than 10% of the maximum amplitude the vibration drops.
  • a particularly good dehumidification effect is achieved if a resonator is used whose natural vibration frequency is in the range of 141 kHz +/- 4 kHz.
  • the aim of the invention is also to provide an electronic device of the type mentioned at the outset for carrying out the method, which is inexpensive to manufacture and requires only a small amount of circuitry.
  • the resonator be designed in such a way that it generates a signal after each vibration excitation by the pulse train signal damped vibration executes, the amplitude of which drops to a value less than 10% of the maximum amplitude of the vibration during the duration of half a period of the pulse train signal.
  • the resonator interacts with the pulse generator circuit such that it experiences an electromagnetic oscillation deflection when a steep pulse edge occurs, which is followed by further oscillation periods. Due to the damping of the resonator, the resonator oscillation decays almost completely during the duration of a half period of the pulse train signal. The oscillation process is repeated when the next steep edge of the pulse sequence signal occurs.
  • the resonator performs damped oscillation trains in time with the pulse sequence signal and generates electromagnetic waves in accordance with the oscillation profile. Only a few inexpensive electrical or electronic components are required to implement the device according to the invention.
  • a simple pulse shaper circuit e.g.
  • the signal supplied to the pulse shaper can be derived, for example, directly from the 50 Hz mains signal, the pulse sequence signal then having a frequency of approximately 50 Hz to excite the resonator.
  • the resonator is preferably designed as a simple L-C parallel resonant circuit, the quality factor of which is selected such that the required damping behavior of the resonator vibration results.
  • the resonator can also be designed as an L-C series resonant circuit.
  • the pulse generator circuit is designed as a pulse shaper circuit.
  • the pulse shaper circuit is connected to the secondary winding of a network transformer and transforms the AC voltage signal supplied by the network into a 50 Hz square-wave signal, which is used as a pulse train signal for vibrating the resonator.
  • the coupling of the resonator to the pulse shaper circuit is preferably chosen such that both rising and falling pulse edges of the pulse train signal lead to excitation of an oscillation of the resonator. In this way, every half period of a square wave signal is used to generate an oscillation train and thus to emit an electromagnetic wave train.
  • the device according to the invention works particularly efficiently with a circuit for suppressing positive voltages.
  • This circuit comprises a diode which ensures that the oscillation-stimulating pulse sequence signal does not assume a voltage which is positive with respect to the earth potential.
  • an optical control display for function control is provided.
  • the optical control display comprises two between the pulse generator circuit and the resonator in parallel switched, oppositely polarized LEDs. The LEDs provide control of the pulse train signal.
  • a plastic housing is preferably provided to protect the device from dirt and damage.
  • Setting means can be provided for setting the desired resonator frequency.
  • a trimmer capacitor or a device that changes the inductance of the coil can be provided for frequency adjustment.
  • An antenna can be provided for the radiation of the electromagnetic waves.
  • the resonator itself is used as a radiation emitter.
  • the coil in particular serves as a transmitter. This further simplifies the circuit.
  • the device according to the invention comprises an LC parallel resonant circuit 10, the resonance frequency of which is 141 kHz lies.
  • the capacitance of the capacitor C of the resonant circuit 10 can be changed in order to adjust the resonance frequency.
  • the resonant circuit 10 is connected downstream of a pulse shaper circuit 12, which converts the sinusoidal 50 Hz signal supplied by a mains transformer 14 into a 50 Hz square wave signal with a duty cycle of 50% and feeds this square wave signal to the resonant circuit 10.
  • an optical control display 16 is inserted with two light-emitting diodes connected in parallel and arranged opposite to one another with regard to their flow direction. The control display 16 is used to monitor the function of the device.
  • the mains transformer 14 serves both as a signal generator for the pulse shaper circuit 12 and as a 12 volt AC voltage source for supplying the entire device according to the invention.
  • a resistor R ensures current limitation of the device.
  • the working current is a few mA. The device therefore requires only low electrical power, which is associated with the advantage of low operating costs.
  • a diode D is connected in such a way that it suppresses the voltage in the device which is positive with respect to earth potential, so that the square-wave signal supplied by the pulse shaper 12 does not assume a voltage which is positive with respect to the earth potential.
  • FIG. 2 shows a qualitative representation of the amplitude profile of the resonator oscillation (diagram A) in comparison with the pulse train signal delivered by the pulse shaper 12 (diagram B).
  • the frequency of the resonator 10 (141 kHz) or the period of the resonator is not drawn to scale for reasons of simplification of the drawing.
  • the oscillating circuit 10 is excited to a natural oscillation, which, however, is damped to such an extent that its amplitude A, which means the amount of the maximum deflection per oscillation period, during the period of a quarter period T / 4 of the rectangular pulse train signal decays almost completely.
  • the next vibration deflection or excitation of the resonator 10 takes place when the next negative edge F ⁇ of the pulse sequence signal occurs.
  • the voltage changes of the oscillation train following the negative edge F+ are opposite to those of the previous oscillation train.
  • the vibration trains have essentially the same damping behavior. After a period T of the rectangular pulse train signal, the oscillation processes described above are repeated when the next positive edge F essentially occurs.
  • the resonant circuit 10 emits wave trains with an amplitude profile according to diagram A and in time with the pulse train signal, i.e. in each half period of the pulse train signal a wave train to the environment.
  • the device according to the invention preferably has a plastic housing which does not or only negligibly absorbs the electromagnetic radiation emitted by the resonator.
  • a plastic housing which does not or only negligibly absorbs the electromagnetic radiation emitted by the resonator.
  • care must be taken to ensure that the radiation-emitting elements, in particular the coil L, are not enclosed by the housing.
  • the pulse train signal be a square wave signal. It is important, however, that the pulse sequence signal contains the resonance frequency of the resonator as a spectral component, which is generally the case when the pulses have steep pulse edges.
  • the device according to the invention is expediently placed in the vicinity of the masonry to be dehumidified.
  • the range achieved in tests with the exemplary embodiment described above, within which a good dehumidifying effect could still be determined, is approximately 20 m, a transmission power of approximately 15 ⁇ W averaged over time being measured.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Drying Of Solid Materials (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Casings For Electric Apparatus (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Drying Of Gases (AREA)
EP90108059A 1989-04-28 1990-04-27 Verfahren zur Entfeuchtung von Mauerwerk durch Elektroosmose mittels elektromagnetischer Bestrahlung und elektronisches Gerät zur Durchführung des Verfahrens Expired - Lifetime EP0395085B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8905412U 1989-04-28
DE8905412U DE8905412U1 (de) 1989-04-28 1989-04-28 Elektronisches Gerät zur Entfeuchtung von Mauerwerk

Publications (2)

Publication Number Publication Date
EP0395085A1 EP0395085A1 (de) 1990-10-31
EP0395085B1 true EP0395085B1 (de) 1992-11-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108059A Expired - Lifetime EP0395085B1 (de) 1989-04-28 1990-04-27 Verfahren zur Entfeuchtung von Mauerwerk durch Elektroosmose mittels elektromagnetischer Bestrahlung und elektronisches Gerät zur Durchführung des Verfahrens

Country Status (9)

Country Link
EP (1) EP0395085B1 (es)
AT (1) ATE82608T1 (es)
DE (2) DE8905412U1 (es)
DK (1) DK0395085T3 (es)
ES (1) ES2037500T3 (es)
GR (1) GR3007100T3 (es)
HR (1) HRP930999B1 (es)
SI (1) SI9010836A (es)
YU (1) YU48391B (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003062546A1 (de) 2002-01-25 2003-07-31 Manfred Arnold Verfahren und anrodnung zum entfeuchten einer wands

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8905412U1 (de) * 1989-04-28 1989-06-22 Coufal, Hans-Peter, Wolfhalden Elektronisches Gerät zur Entfeuchtung von Mauerwerk
ATE204047T1 (de) * 1995-03-10 2001-08-15 Hildegard Berger Vorrichtung zur entfeuchtung von mauerwerk
FR2809426A1 (fr) * 2000-05-25 2001-11-30 Thierry Patrice Allain Appareil electrique permettant d'assecher les materiaux de construction soumis aux remontees capillaires et infiltrations laterales d'eau a l'aide de l'action d'electrocapillarite
EP1774113B1 (fr) * 2004-07-08 2008-08-20 STUMPP, Bernard Dispositif et procede pour stopper les remontees d'eau et d'humidite par capillarite
DE102005055889A1 (de) * 2005-11-23 2007-05-31 Schwille-Elektronik Produktions- Und Vertriebs- Gmbh Vorrichtung und Verfahren zum Beeinflussen von Fließvorgängen
DE102006054355A1 (de) * 2006-11-17 2008-06-05 Büsch, Werner, Dipl.-Volksw. Verfahren und Vorrichtung zur Entfeuchtung
CH702034B1 (de) 2007-04-13 2011-04-29 Markus Bloedt Verfahren und Gerät zum Entfeuchten von Objekten.
DE202018006175U1 (de) * 2018-02-13 2019-07-11 Rossano De Rosa Trocknungsvorrichtung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2010361A1 (de) * 1970-03-05 1971-09-23 Siemens Ag Schaltungsanordnung zur periodischen Erzeugung von gedämpften Hochfrequenzschwingungen, insbesondere zur Anwendung in der Hochfrequenzchirurgie
DE2332752A1 (de) * 1973-06-27 1975-01-23 Siemens Ag Schaltungsanordnung zur periodischen erzeugung von gedaempften hochfrequenzschwingungen
US4418481A (en) * 1980-10-14 1983-12-06 Walter Wehrli Apparatus for the dehumidation and drying of damp structures
DD250219A1 (de) * 1986-06-19 1987-09-30 Inst Fuer Nachrichtentechnik Schaltungsanordnung zum umformen sinusfoermiger signale in unipolare rechtecksignale
DE3740894A1 (de) * 1987-12-03 1989-06-15 Philips Patentverwaltung Rechteckgenerator
DE8905412U1 (de) * 1989-04-28 1989-06-22 Coufal, Hans-Peter, Wolfhalden Elektronisches Gerät zur Entfeuchtung von Mauerwerk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003062546A1 (de) 2002-01-25 2003-07-31 Manfred Arnold Verfahren und anrodnung zum entfeuchten einer wands

Also Published As

Publication number Publication date
HRP930999A2 (en) 1997-08-31
GR3007100T3 (es) 1993-07-30
DE59000478D1 (de) 1992-12-24
DE8905412U1 (de) 1989-06-22
HRP930999B1 (en) 1999-12-31
SI9010836A (en) 1996-02-29
YU48391B (sh) 1998-07-10
YU83690A (sh) 1994-06-10
DK0395085T3 (da) 1993-03-29
ATE82608T1 (de) 1992-12-15
ES2037500T3 (es) 1993-06-16
EP0395085A1 (de) 1990-10-31

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