BRPI0704754A2 - process and device for continuously measuring the thickness of extruded plastic films - Google Patents
process and device for continuously measuring the thickness of extruded plastic filmsInfo
- Publication number
- BRPI0704754A2 BRPI0704754A2 BRPI0704754A BRPI0704754A2 BR PI0704754 A2 BRPI0704754 A2 BR PI0704754A2 BR PI0704754 A BRPI0704754 A BR PI0704754A BR PI0704754 A2 BRPI0704754 A2 BR PI0704754A2
- Authority
- BR
- Brazil
- Prior art keywords
- thickness
- capacitive sensor
- distance
- measurement
- plastic films
- Prior art date
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
PROCESSO E DISPOSITIVO PARA MEDIR CONTINUAMENTE A ESSPESSURA DE FILMES PLáSTICOS EXTRUSADOS. A presente invenção refere-se a um processo e equipamento para medição da espessura de filmes plásticos, de maneira contínua e sem contato, com o uso de um sensor capacitivo. Essa medição pode ser feita de 3 maneiras; com o uso de um anteparo metálico fixo (3), cuja distância até o sensor capacitivo é fixa; outra maneira, é com o uso de um anteparo metálico não-uniforme (6) cuja distância até o sensor capacitivo n~o é fixa ao longo da largura do filme, sendo essa distância medida constantemente por um sensor eddy-current (7). Esta distância medida serve para re-calibraç~o constante da fórmula que relaciona a capacitáncia medida com a espessura do filme. A terceira modalidade de medição é com o uso somente de um sensor capacitivo (8), encostado ou quase encostado ao filme sem o uso de nenhum anteparo metálico.PROCESS AND DEVICE FOR CONTINUOUSLY MEASURING THE THICKNESS OF EXTRUDED PLASTIC MOVIES. The present invention relates to a process and equipment for continuously and non-contacting thickness measurement of plastic films using a capacitive sensor. This measurement can be done in 3 ways; using a fixed metal shield (3), the distance of which to the capacitive sensor is fixed; another way is by using a non-uniform metallic shield (6) whose distance to the capacitive sensor is not fixed along the width of the film, this distance being constantly measured by an eddy-current sensor (7). This measured distance serves for constant re-calibration of the formula relating the measured capacitance to the film thickness. The third mode of measurement is the use of a capacitive sensor (8) only, touching or almost touching the film without the use of any metal shield.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0704754 BRPI0704754A2 (en) | 2007-11-19 | 2007-11-19 | process and device for continuously measuring the thickness of extruded plastic films |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0704754 BRPI0704754A2 (en) | 2007-11-19 | 2007-11-19 | process and device for continuously measuring the thickness of extruded plastic films |
Publications (1)
Publication Number | Publication Date |
---|---|
BRPI0704754A2 true BRPI0704754A2 (en) | 2009-07-21 |
Family
ID=40873653
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI0704754 BRPI0704754A2 (en) | 2007-11-19 | 2007-11-19 | process and device for continuously measuring the thickness of extruded plastic films |
Country Status (1)
Country | Link |
---|---|
BR (1) | BRPI0704754A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114383493A (en) * | 2022-02-28 | 2022-04-22 | 中国工程物理研究院总体工程研究所 | Method for measuring thickness of non-conductive covering layer on non-contact metal surface |
CN117344606A (en) * | 2023-12-04 | 2024-01-05 | 山西晋北高速公路养护有限公司 | Highway road surface thickness measuring equipment that paves |
-
2007
- 2007-11-19 BR BRPI0704754 patent/BRPI0704754A2/en not_active IP Right Cessation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114383493A (en) * | 2022-02-28 | 2022-04-22 | 中国工程物理研究院总体工程研究所 | Method for measuring thickness of non-conductive covering layer on non-contact metal surface |
CN114383493B (en) * | 2022-02-28 | 2024-01-30 | 中国工程物理研究院总体工程研究所 | Non-contact metal surface non-conductive coating thickness measuring method |
CN117344606A (en) * | 2023-12-04 | 2024-01-05 | 山西晋北高速公路养护有限公司 | Highway road surface thickness measuring equipment that paves |
CN117344606B (en) * | 2023-12-04 | 2024-02-13 | 山西晋北高速公路养护有限公司 | Highway road surface thickness measuring equipment that paves |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B03A | Publication of an application: publication of a patent application or of a certificate of addition of invention | ||
B08F | Application fees: dismissal - article 86 of industrial property law |
Free format text: REFERENTE AS 3A E 4A ANUIDADES. |
|
B08K | Lapse as no evidence of payment of the annual fee has been furnished to inpi (acc. art. 87) |
Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2161 DE 05/06/2012. |