| Titre : |
Inline layer thickness measurement : Contactless measurement with terahertz waves in the micrometer to centimeter range |
| Type de document : |
texte imprimé |
| Auteurs : |
Joachim Jonuscheit, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 124-127 |
| Langues : |
Anglais (eng) |
| Catégories : |
Epaisseur -- Mesure
Matières plastiques -- Extrusion
Mesures dimensionnelles sans contact
Tubes
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Terahertz technology supports contactless inline measurement in the micrometer to centimeter range. Wall thicknesses of pipes, hoses, and other extrusion products can be verified directly in the production process. ‧Falling below the minimum thickness is identified immediately, thereby avoiding waste. |
| Note de contenu : |
- Limits of established methods
- Low process integration effort
- Measuring method for layers of various thicknesses
- Application examples from pipe production
- Inspection of corrugated pipes in the process
- Practical benefits
- Figure : Terahertz inspection system for the inline measurement of pipe wall thicknesses. The wall thickness of single-layer and multi-layer pipes is determined simultaneously at four positions
- Fig. 1 : Closeup of a terahertz sensor with flushing device to prevent the accumulation of water and dust on the viewing window
- Fig. 2 : Measuring setup with terahertz FMCW hand-held scanner : measurements in the field, for example on district heating pipes, are possible with the mobile terahertz sensor
- Fig. 3 : Wall thickness measurement on a foamed PP pipe : Measuring signal and simulated signal sequence used for evaluation and examination of the individual layers along the pipe with 40 measurements per second
- Fig. 4 : Comparison of the measured wall thickness of the individual layers along the pipe. The optical path length corresponds to the product of the geometric thickness and the refraction index (approx. 1.7) and distribution of the measured wall thicknesses along the pipe circumference
- Fig. 5 : Wall thickness measurement on corrugated pipes : Measurement at four positions (CH1-4) along the circumference. The peak height is 3 cm, the diameter is 130 mm, and the feed rate is 4 m/min and the distance between two peaks is 2.3 mm and the feed rate is 400 mm/s |
| En ligne : |
https://drive.google.com/file/d/15B-3qh0wRtzwMbSl535AjGlFncl7hJ51/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33806 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 10 (10/2019) . - p. 124-127
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Inline layer thickness measurement in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 10 (10/2019)
