DE734190C - Procedure for determining the moisture distribution from the inside of the wood to the surface - Google Patents

Procedure for determining the moisture distribution from the inside of the wood to the surface

Info

Publication number
DE734190C
DE734190C DEN39344D DEN0039344D DE734190C DE 734190 C DE734190 C DE 734190C DE N39344 D DEN39344 D DE N39344D DE N0039344 D DEN0039344 D DE N0039344D DE 734190 C DE734190 C DE 734190C
Authority
DE
Germany
Prior art keywords
wood
moisture
determining
procedure
electrodes
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
Application number
DEN39344D
Other languages
German (de)
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.)
EUGEN NUSSER DR ING
Original Assignee
EUGEN NUSSER DR ING
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 EUGEN NUSSER DR ING filed Critical EUGEN NUSSER DR ING
Priority to DEN39344D priority Critical patent/DE734190C/en
Application granted granted Critical
Publication of DE734190C publication Critical patent/DE734190C/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/048—Investigating 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

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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)

Description

Verfahren zur Bestimmung der Feuchtigkeitsverteilung vom Holzinnern nach der Oberfläche Zusatz zum Patent 708045 Das Hauptpatent betrifft ein Verfahren zur Bestimmung der Durchschnittsfeuchtigkeit von Holz durch Messung des elektrischen Widerstandes mittels Elektroden, die an gegenüberliegende Seiten der Holzprobe angedrückt werden. Von den bekannten Verfahren dieser Art unterscheidet sich dasjenige nach dem Hauptpatent im wesentlichen dadurch, daß Spitzenelektroden verwendet werden, die in Plattenelektroden eingesetzt sind und bis zu einer Tiefe von 0,1- bis o,2mal der zwischen den Elektroden liegenden Holzstärke eingebracht werden, wodurch bei allen praktisch vorkommenden Feuchtigkeitsgefällen Durchschnittswerte der Feuchtigkeit gemessen werden können.Procedure for determining the moisture distribution from the inside of the wood after the surface addition to patent 708045 The main patent relates to a process to determine the average moisture content of wood by measuring the electrical Resistance by means of electrodes that are pressed against opposite sides of the wood sample will. The one after differs from the known methods of this type the main patent essentially in that tip electrodes are used, which are used in plate electrodes and to a depth of 0.1 to 0.2 times the thickness of the wood lying between the electrodes are introduced, whereby at all practically occurring moisture gradients average values of the moisture can be measured.

Für viele Zwecke der Holzverarbeitung ist es von größter Bedeutung, feststellen zu können, ob der Trockenprozeß des Holzes beendet, d. h. der hygroskopische Gleidgewichtszustand erreicht und damit die Feuchtigkeit gleichmäßig über den ganzen Holzkörper verteilt ist. Diese Feststellung ist bisher nur dadurch möglich, daß das Holz in Scheiben zerlegt und die Feuchtigkeit dieser Scheiben einzeln bestimmt wird Da bei ungleichmäßiger Feuchtigkeitsverteilung infolge der Trocknung das Feuchtigkeitsgefälle in den äußersten Holzschichten am größten ist, wird diese Aufgabe erfindungsgemäß dadurch gelöst, daß eine Messung entsprechend dem AnsprucI des Patents 708045 vorgenommen wird, die infolge des Durchstoßens der äußersten Schichten deren fehlerhaften Einfluß ausscheidet und hierauf eine Messung an der gleichen Stelle mit Plattenelektroden derselheu Kontaktfläche, wie sie die Grundplatte besitzt, in der die Spitzen eingebracht sind, durchgeführt wird, wobei die zweite Messung den Einfluß der äußersten Schichten berücksichtigt. Stimmen beide NIeßergebnisse überein, so ist die Feuchtigkeit im Holz vollständig ausgeglichen, während Unterschiede in den Meßergebnissen ein Maß für ein noch vorhandenes Feuchtigkeitsgefälle sind. Auf diese Weise erhält man eine einfache, rasch und ohne Holzzerstörung durchzuführende Methode zur Feststellung der Feuchtigkeitsverteilung. For many woodworking purposes it is of the utmost importance to be able to determine whether the wood has finished drying, d. H. the hygroscopic Achieved balance weight and thus the moisture evenly over the whole Wood body is distributed. So far, this has only been possible because the wood is cut into slices and the moisture content of these slices is determined individually If there is an uneven distribution of moisture as a result of drying, the moisture gradient will increase is greatest in the outermost layers of wood, this object is achieved according to the invention solved by taking a measurement in accordance with the claims of patent 708045 which, due to the piercing of the outermost layers, their defective influence and then a measurement at the same point with plate electrodes the same contact surface as the base plate in which the tips are inserted are carried out, the second measurement being the influence of the outermost layers considered. If both measurement results agree, the humidity is in Wood completely balanced, while differences in measurement results are a measure are for a still existing moisture gradient. This is how you get one simple, quick and easy method of detection that can be carried out without destroying wood the moisture distribution.

Claims (1)

PATENTANSPRUCH; Verfahren zur Bestimmung der Feuchtigl ; eitsverteilung vom Holzinnern nach der Oberfläche unter Anwendung des Verfahrens nach Anspruch 1 des Patents 708045, dadurch gekennzeichnet, daß je eine Messung mit am Holzkörper sich gegenüberfiegenden Spitzenelektroden. die in Plattenelektroden eingebracht sind und in eine Tiefe von 0.1- bis 0,2mal der Holzstärke eindringen, bis sich die Platten an das Holz anlegen, und mit Plattenelektroden ohne Spitzen derselben Kontaktfläche wie die obigen Plattenelektroden vorgenommen wird, wobei gleiches Meßergebnis Feuchtigkeitsausgleich anzeigt, svährend Unterschiede im Meßergebnis ein Maß für das Feuchtigkeitsgefälle sind. PATENT CLAIM; Method for determining the moisture content; distribution from the inside of the wood to the surface using the method according to claim 1 of the patent 708045, characterized in that each a measurement with opposite tip electrodes on the wooden body. those in plate electrodes are introduced and penetrate to a depth of 0.1 to 0.2 times the wood thickness, until the plates lie against the wood, and with plate electrodes without tips the same contact area as the above plate electrodes is made, where same measurement result shows moisture balance while differences in measurement result are a measure of the moisture gradient.
DEN39344D 1935-09-05 1935-09-05 Procedure for determining the moisture distribution from the inside of the wood to the surface Expired DE734190C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEN39344D DE734190C (en) 1935-09-05 1935-09-05 Procedure for determining the moisture distribution from the inside of the wood to the surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN39344D DE734190C (en) 1935-09-05 1935-09-05 Procedure for determining the moisture distribution from the inside of the wood to the surface

Publications (1)

Publication Number Publication Date
DE734190C true DE734190C (en) 1943-04-12

Family

ID=7347973

Family Applications (1)

Application Number Title Priority Date Filing Date
DEN39344D Expired DE734190C (en) 1935-09-05 1935-09-05 Procedure for determining the moisture distribution from the inside of the wood to the surface

Country Status (1)

Country Link
DE (1) DE734190C (en)

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