c3cf3e528af6cbe28452324e1bc0e0fd pmc_33924501.pdf 182cc4e6050b776f282b7ae4389758f0056ca594 pmc_33924501.pdf d865cd0c31f801516ba02a77dfec76a0cdee17e9b333cc691e340ec3fc666fb0 pmc_33924501.pdf Title: Position Sensors for Industrial Applications Based on Electromagnetic Encoders Subject: Optical and magnetic linear/rotary encoders are well-known systems traditionally used in industry for the accurate measurement of linear/angular displacements and velocities. Recently, a different approach for the implementation of linear/rotary encoders has been proposed. Such an approach uses electromagnetic signals, and the working principle of these electromagnetic encoders is very similar to the one of optical encoders, i.e., pulse counting. Specifically, a transmission line based structure fed by a harmonic signal tuned to a certain frequency, the stator, is perturbed by encoder motion. Such encoder consists in a linear or circular chain (or chains) of inclusions (metallic, dielectric, or apertures) on a dielectric substrate, rigid or flexible, and made of different materials, including plastics, organic materials, rubber, etc. The harmonic signal is amplitude modulated by the encoder chain, and the envelope function contains the information relative to the position and velocity. The paper mainly focuses on linear encoders based on metallic and dielectric inclusions. Moreover, it is shown that synchronous electromagnetic encoders, able to provide the quasi-absolute position (plus the velocity and direction of motion in some cases), can be implemented. Several prototype examples are reviewed in the paper, including encoders implemented by means of additive process, such as 3D printed and screen-printed encoders. Keywords: electromagnetic encoders; position sensors; microwave sensors; microstrip technology; motion control Author: Ferran Paredes, Cristian Herrojo and Ferran Martín Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Wed Apr 14 13:42:38 2021 CEST ModDate: Wed Apr 14 13:45:39 2021 CEST Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 28 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 11281384 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- EMQTSK+URWPalladioL-Ital Type 1 Custom yes yes no 10 0 EANUTG+URWPalladioL-Bold Type 1 Custom yes yes no 15 0 OGQWHK+URWPalladioL-Roma Type 1 Custom yes yes no 19 0 WLENKM+VnURWPalladioL-Bold Type 1 Custom yes yes no 23 0 DRZUJM+VnURWPalladioL Type 1 Custom yes yes no 28 0 RVSEMT+TimesNewRomanPS-BoldItalicMT Type 1C WinAnsi yes yes no 36 0 MCBCCI+SourceSansRoman-Regular Type 1C Custom yes yes no 58 0 MCBCCM+SourceSansRoman.613wght Type 1C Custom yes yes no 62 0 MCBCCO+SourceSansRoman-Bold Type 1C Custom yes yes no 66 0 OHXQCJ+CMSY10 Type 1 Builtin yes yes no 84 0 ESWYCF+PazoMath-Italic Type 1 Builtin yes yes no 112 0 SPXLNH+PazoMath Type 1 Builtin yes yes no 137 0 VQBCER+EURM10 Type 1 Builtin yes yes no 169 0 Jhove (Rel. 1.22.1, 2019-04-17) Date: 2021-09-11 03:24:06 CEST RepresentationInformation: pmc_33924501.pdf ReportingModule: PDF-hul, Rel. 1.12.1 (2019-04-17) LastModified: 2021-05-03 03:46:28 CEST Size: 11281384 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 544 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@13c27452 Item: Title: Working Principle of Electromagnetic Encoders Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@262b2c86 Item: Title: Prototype Examples of Electromagnetic Encoders Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@371a67ec Children: Item: Title: Electromagnetic Encoders Based on Linear Strips Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@5ed828d Item: Title: Electromagnetic Encoders Based on Dielectric Inclusions Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@50d0686 Item: Title: Electromagnetic Encoders Based on Metallic Patches Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@7a3d45bd Item: Title: Comparative Analysis and Discussion Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@1e7c7811 Item: Title: Conclusions Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@77ec78b9 Item: Title: References Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@1a3869f4 Info: Title: Position Sensors for Industrial Applications Based on Electromagnetic Encoders Author: Ferran Paredes, Cristian Herrojo and Ferran Martín Subject: Optical and magnetic linear/rotary encoders are well-known systems traditionally used in industry for the accurate measurement of linear/angular displacements and velocities. Recently, a different approach for the implementation of linear/rotary encoders has been proposed. Such an approach uses electromagnetic signals, and the working principle of these electromagnetic encoders is very similar to the one of optical encoders, i.e., pulse counting. Specifically, a transmission line based structure fed by a harmonic signal tuned to a certain frequency, the stator, is perturbed by encoder motion. Such encoder consists in a linear or circular chain (or chains) of inclusions (metallic, dielectric, or apertures) on a dielectric substrate, rigid or flexible, and made of different materials, including plastics, organic materials, rubber, etc. The harmonic signal is amplitude modulated by the encoder chain, and the envelope function contains the information relative to the position and velocity. The paper mainly focuses on linear encoders based on metallic and dielectric inclusions. Moreover, it is shown that synchronous electromagnetic encoders, able to provide the quasi-absolute position (plus the velocity and direction of motion in some cases), can be implemented. Several prototype examples are reviewed in the paper, including encoders implemented by means of additive process, such as 3D printed and screen-printed encoders. 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