title: FPGA-based smart sensor for online displacement measurements using a heterodyne interferometer.
abstract: The measurement of small displacements on the nanometric scale demands metrological systems of high accuracy and precision. In this context, interferometer-based displacement measurements have become the main tools used for traceable dimensional metrology. The different industrial applications in which small displacement measurements are employed requires the use of online measurements, high speed processes, open architecture control systems, as well as good adaptability to specific process conditions. The main contribution of this work is the development of a smart sensor for large displacement measurement based on phase measurement which achieves high accuracy and resolution, designed to be used with a commercial heterodyne interferometer. The system is based on a low-cost Field Programmable Gate Array (FPGA) allowing the integration of several functions in a single portable device. This system is optimal for high speed applications where online measurement is needed and the reconfigurability feature allows the addition of different modules for error compensation, as might be required by a specific application.
authors.affiliation: HSPdigital, CA Procesamiento Digital de Señales, CA Telematica, DICIS, Universidad de Guanajuato, Carr Salamanca-Valle km 3.5+1.8, Palo Blanco, 36885 Salamanca, Gto, Mexico. lavera@hspdigital.org.
authors.forename: Luis Alberto
authors.initials: LA
authors.lastname: Vera-Salas
authors.forename: Sandra Veronica
authors.initials: SV
authors.lastname: Moreno-Tapia
authors.forename: Arturo
authors.initials: A
authors.lastname: Garcia-Perez
authors.forename: Rene
authors.initials: R
authors.lastname: de Jesus Romero-Troncoso
authors.forename: Roque Alfredo
authors.initials: RA
authors.lastname: Osornio-Rios
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Serroukh
authors.forename: Eduardo
authors.initials: E
authors.lastname: Cabal-Yepez
mesh_terms: D000465:Algorithms; D015374:Biosensing Techniques / Q000379:methods*; D003201:Computers; D007091:Image Processing, Computer-Assisted; D007368:Interferometry / Q000379:methods*; D020407:Internet; D015233:Models, Statistical; D009038:Motion; D055095:Optics and Photonics; D015203:Reproducibility of Results; D012984:Software