EP2271925A1 - Verfahren zur messung physikalischer eigenschaften von endlospressgütern insbesondere von spanplatten - Google Patents
Verfahren zur messung physikalischer eigenschaften von endlospressgütern insbesondere von spanplattenInfo
- Publication number
- EP2271925A1 EP2271925A1 EP09738094A EP09738094A EP2271925A1 EP 2271925 A1 EP2271925 A1 EP 2271925A1 EP 09738094 A EP09738094 A EP 09738094A EP 09738094 A EP09738094 A EP 09738094A EP 2271925 A1 EP2271925 A1 EP 2271925A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- physical properties
- sensor elements
- excited
- intermediate frequency
- elements
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000000704 physical effect Effects 0.000 title claims abstract description 12
- 239000011093 chipboard Substances 0.000 title claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 15
- 238000010168 coupling process Methods 0.000 claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000012854 evaluation process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2475—Embedded probes, i.e. probes incorporated in objects to be inspected
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0238—Wood
Definitions
- the invention relates to a method for measuring physical properties of continuous presses, in particular chipboard.
- Chipboard is made from wood chips and a synthetic resin glue by pressing the raw materials. They are mainly used in furniture and interior design as well as prefabricated house construction.
- the wood used is first comminuted, the size of the chips or fibers produced being different for each type of plate.
- the fibers are mixed with binders before drying or immediately thereafter.
- binders for example, urea-formaldehyde resin, melamine-formaldehyde resin, phenol-formaldehyde resin and their mixed products, polyurethanes or tannin resins are used.
- organic, inorganic binders such as Portland cement, magnesia cement or gypsum can also be used to produce chipboard.
- hardeners such as ammonium sulfate, ammonium nitrate, ammonium chloride are used as auxiliaries and additives; Accelerators such as potassium carbonate, amines; Formaldehyde scavengers; Hydrophobizing agents; Fire retardants such as ammonium phosphate; Fungicides and dyes are used.
- the chips are dried so that they have the required for the pressing process target moisture content of about 1-8% in the top layer and 4-6% in the middle layer.
- the chips are machine-spotted and depending on the size and purity either in the middle layer or in the Cover layer used. Then the chips are glued and sprinkled the chips to a fleece after gluing. This is pressed under the action of high temperatures of about 200 0 C to plates. Modern presses work in a continuous mode of operation, ie as endless belt presses. After pressing, the plates are conditioned (stored for one week to balance moisture and heat in the plate), trimmed and ground.
- the invention is therefore based on the object to provide a solution with the physical parameters in the interior of
- Endlospressgütern can be measured during the manufacturing process.
- This object is achieved by a method for measuring physical properties of continuous products in particular chipboard in which the sensor elements and associated coupling elements are embedded in the pressed material and in which further an interrogator is provided which has an electrical operative connection to the coupling elements and wherein the Sensor elements are excited, and from the answer a statement about the physical properties of the continuous presses is made.
- chipboard The essential physical properties of chipboard are temperature and pressure.
- SAW resonators can be advantageously used as sensor elements.
- SAW resonators or other designations SAW sensors have proven themselves as temperature sensors even under demanding environmental conditions. For example, your application is in http: // www. IMTEK. en / content / pdf / public / 1997 / tires .pdf "Wireless measuring with passive SAW sensors using the example of tire air pressure monitoring; A. Pohl, L. Reindl, H. Scherr ".
- the electrical active connection has electrically conductive wires which protrude laterally from the pressed material. These wires can then be contacted laterally on the press, for example by means of electrically conductive strips
- Fig.l an inventive arrangement for carrying out the method according to the invention schematically and in their position in relation to the press
- FIG. 2 shows a pulse diagram for the inventive excitation of the SAW resonator with multiple pulses.
- the inventive arrangement according to FIG. 1 comprises a query device with an evaluation unit 1 and transmitting / receiving electrodes 2 which are arranged laterally on the press. From the press itself, only the electrically acting as a ground surface metallic press plates 7 are shown. Between these is the pressed material, in which at least one sensor element 5 and associated coupling elements 3, 6 are embedded. Coupling elements 3, 6 and sensor elements 5 are interconnected by metallic wires.
- the Sensor elements 5 preferably SAW resonators for measuring the internal temperature and with suitable additions such as a pressure cell for measuring the pressure are embedded in the middle of the particle board, the pressed material, while the coupling elements 3, 6 are mounted close to the edge of the material to be pressed. This gives a good capacitive coupling with the transmitting coupling elements 2 of the interrogator.
- evaluation unit 1 and transmitting / receiving electrodes 2 are on one side of FIG.
- pressing plates 7 are connected to each other and grounded.
- the excitation of the trained as SAW resonators sensor elements 5 can be made from one side, while receiving the response of the sensor element 5, the decay of the SAW resonator by means of evaluation 7 and coupling electrodes 8 on the other side of the pressing device and evaluated becomes.
- the short duration of oscillation after an excitation process can be lengthened thereby simplifying the evaluation process so that the SAW resonators are excited several times for each measuring process and several decay processes 22 are evaluated.
- a further improvement in the evaluation of the decay signal of an SAW resonator can also be achieved by mixing the decay signal according to the principle of a heterodyne receiver into an intermediate frequency range.
- the signal is sampled and evaluated by Fast Fourier Transformation.
- this mixture takes place depending on the desired Meßauflö- solution with different frequency.
- a low intermediate frequency the temperature can be determined very accurately, but the permissible measuring range is relatively low.
- a high intermediate frequency leads to a large measuring range with comparatively low accuracy.
- the inventive combination of a mixture to a high intermediate frequency and a large measuring range, derived therefrom coarse information about the frequency of the decay signal and subsequent mixing to a low intermediate frequency with high accuracy allows a method which leads with very little effort to very accurate results.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT6682008 | 2008-04-29 | ||
| PCT/EP2009/055027 WO2009133050A1 (de) | 2008-04-29 | 2009-04-27 | Verfahren zur messung physikalischer eigenschaften von endlospressgütern insbesondere von spanplatten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2271925A1 true EP2271925A1 (de) | 2011-01-12 |
Family
ID=40854815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09738094A Withdrawn EP2271925A1 (de) | 2008-04-29 | 2009-04-27 | Verfahren zur messung physikalischer eigenschaften von endlospressgütern insbesondere von spanplatten |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2271925A1 (de) |
| WO (1) | WO2009133050A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT510193B1 (de) | 2010-07-28 | 2012-09-15 | Siemens Ag Oesterreich | Kombiniertes temperatur-druck-messverfahren mit passiven sensoren |
| AT510244B1 (de) * | 2010-07-28 | 2015-06-15 | Siemens Ag Oesterreich | Schnelles messverfahren zur erfassung von ofw-sensordaten |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2333839A (en) * | 1998-01-30 | 1999-08-04 | Dimitris Katsanis | Composite damage detection |
-
2009
- 2009-04-27 WO PCT/EP2009/055027 patent/WO2009133050A1/de not_active Ceased
- 2009-04-27 EP EP09738094A patent/EP2271925A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009133050A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009133050A1 (de) | 2009-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20100824 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA RS |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ZALESAK, THOMAS Inventor name: SCHINDELARZ, GEORG Inventor name: POHL, ALFRED Inventor name: MEGNER, ALFRED PAUL |
|
| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20160202 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20160614 |