where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

LECOEUR ELECTRONIQUE
The Specialist of electronics for ultrasonic testing.

1339 views
Technical Discussions
Theodoros Theodoulidis
Teacher, Researcher
University of Western Macedonia, Greece, Joined Dec 1999, 5

Theodoros Theodoulidis

Teacher, Researcher
University of Western Macedonia,
Greece,
Joined Dec 1999
5
01:47 Feb-15-2001
Wood moisture measurement

I believe that the two main methods of wood moisture measurement are:
1) The drying oven method
2) The electric method
I want to ask if I can measure it by using UT, since I have seen that ultrasonic velocity is affected by moisture content.
Is there active research on the subject?



    
 
 
Bernd Wolter, IZFP, Saarbruecken, Germany
Bernd Wolter, IZFP, Saarbruecken, Germany
04:04 Feb-15-2001
Re: Wood moisture measurement
You also can measure moisture by a variety of other nondestructive methods. Some companies offer commercial hand-held sensors based on electrical resistivity measuring for wood moisture determination. Besides, dielectric methods (capacitice methods, microwaves, time-domain reflectometry), thermographic methods and x-ray methods are used for it.

A survey about wood moisture measurement is given by: Melhorn L., Plinke B.; "Zum Stand der Feuchtemessung an Massivholz", Holz-Zentralblatt 120, p. 1837, 1990 (in German). Ultrasound for wood moisture measurement is used e.g. by: Bernatowicz G., Matejak M.; "Application of Ultrasound Time Measurements for Moisture Content detection During Drying", Proc. 1st Europ. Symp. Nondestructive Evaluation of Wood, 21.-23. Sept. ‘94, Sopron, Paper 4, 1994.

At IZFP, we are using NMR (Nuclear Magnetic Resonance) in One-Sided Access for depth-profiling of the moisture content in wood. In contrast to other nondestructive methods, NMR does also allows to determine detph-profiles of wood density. Therefore it is possible to determine absolute moisture contents in mass-%.


    
 
 
Wieslaw Bicz
Wieslaw Bicz
04:22 Feb-15-2001
Re: Wood moisture measurement
: I believe that the two main methods of wood moisture measurement are:
: 1) The drying oven method
: 2) The electric method
: I want to ask if I can measure it by using UT, since I have seen that ultrasonic velocity is affected by moisture content.
: Is there active research on the subject?
.
Such research can be relatively easy done. If you are interested, we can test it, using transmission of air ultrasound through the wood.
We have ready made devices, suitable for this purpose.
It seems for me, that it should work, but needs many tests to calibrate the measurement.

Wieslaw Bicz



    
 
 
Nikolay Kostadinov Ganchev
Nikolay Kostadinov Ganchev
01:49 Apr-28-2001
Re: Wood moisture measurement
Dear sir
Please,send my more information for wood moisture measurement and methods of wood moisture measuring.


    
 
 
Joseph Pascente
Engineering
Lixi, Inc., USA, Joined Nov 1998, 39

Joseph Pascente

Engineering
Lixi, Inc.,
USA,
Joined Nov 1998
39
06:14 Apr-29-2001
Wood moisture measurement
The Lixi Profiler will measure moisture amount in wood
whose thickness is the same.



    
 
 
nazmi yetim
nazmi yetim
07:04 Apr-12-2002
Re: Wood moisture measurement
: Dear sir
: Please,send my more information for wood moisture measurement and methods of wood moisture measuring.
.b



    
 
 
N.T. Azarov
Engineering
GosNIIGA, Russia, Joined Jan 2000, 12

N.T. Azarov

Engineering
GosNIIGA,
Russia,
Joined Jan 2000
12
07:19 Apr-14-2002
Re: Wood moisture measurement
: : Dear sir
: : Please,send my more information for wood moisture measurement and methods of wood moisture measuring.
: .b
.


Dear sir.
We develop a meter of humidity of wood by a capacity method - "humidity meter VD-1". The instrument allows to measure of relative (%) humidity of wood on depth up to 30-40mm, while other similar instruments measure humidity only in surface layers. The instrument has the switch, depending on a type of a tree.
Nowadays instrument is used by us for definition of presence of a moisture in aircraft honeycomb constructions from composite materials.
The instrument is portable, mass 200g. The power supply is carried out from the accumulator.



    
 
 

Product Spotlight

NEOS III

NEOS III is Logos Imagings lightest DR system. With a built-in battery and internal wireless commu
...
nication, the NEOS III is perfect for users that want to quickly assess an item.
>

NDTkit RT

NDTkit RT, TESTIA's Digital Radiography software The NDTkit product line software for X-ray analysi
...
s. NDTkit RT is a software benefiting from the Ultis kernel which is dedicated to radiographic image analysis. It offers a set of tools and filtering processes to assist RT operators in finding relevant flaws.
>

High Resolution Industrial CT System for Small/Medium Size Parts Inspection

The YXLON FF35 CT computed tomography system is designed to achieve extremely precise inspection res
...
ults for a wide range of applications. Available in a single or dual tube configuration, it is perfect for very small to medium size parts inspection in the automotive, electronics, aviation, and material science industries.
>

FlexoFORM™

The FlexoFORM™ solution integrates flexible phased array probe technology in a scanner to solv
...
e the challenges that come with inspecting pipe elbows. When combined with a water column, this solution can be used to collect easy-to-interpret data on elbows with diameters ranging from 4.5 in. OD up to flat and offers many benefits.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window