TY - JOUR
T1 - Electromagnetic Encoders Screen-Printed on Rubber Belts for Absolute Measurement of Position and Velocity
AU - Paredes, Ferran
AU - Herrojo, Cristian
AU - Moya, Ana
AU - Berenguel Alonso, Miguel
AU - Gonzalez, David
AU - Bruguera, Pep
AU - Delgado Simao, Claudia
AU - Martín, Ferran
N1 - Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/3/5
Y1 - 2022/3/5
N2 - This paper presents, for the first time, an absolute linear electromagnetic encoder consisting of a rubber belt with two chains of screen-printed metallic inclusions (rectangular patches). The position, velocity, and direction of the belt (the moving part) is determined by detecting the inclusions when they cross the stator (the static part). The stator is a microstrip line loaded with three complementary split ring resonators (CSRRs), resonant elements exhibiting a resonance frequency perturbed by the presence of inclusions on top of them (contactless). The line is fed by three harmonic signals tuned to the resonance frequencies of the CSRRs. Such signals are generated by a voltage-controlled oscillator (VCO) managed by a microcontroller. The sensed data are retrieved from the pulses contained in the envelope functions of the respective amplitude modulated (AM) signals (caused by the belt motion) generated at the output port of the line. One of the signals provides the absolute belt position, determined by one of the chains, the encoded one. The information relative to the velocity and motion direction is contained in the other AM signals generated by the motion of the other chain, periodic, and thereby, uncoded. The spatial resolution of the system, a figure of merit, is 4 mm. Special emphasis is devoted to the printing process of the belt inclusions.
AB - This paper presents, for the first time, an absolute linear electromagnetic encoder consisting of a rubber belt with two chains of screen-printed metallic inclusions (rectangular patches). The position, velocity, and direction of the belt (the moving part) is determined by detecting the inclusions when they cross the stator (the static part). The stator is a microstrip line loaded with three complementary split ring resonators (CSRRs), resonant elements exhibiting a resonance frequency perturbed by the presence of inclusions on top of them (contactless). The line is fed by three harmonic signals tuned to the resonance frequencies of the CSRRs. Such signals are generated by a voltage-controlled oscillator (VCO) managed by a microcontroller. The sensed data are retrieved from the pulses contained in the envelope functions of the respective amplitude modulated (AM) signals (caused by the belt motion) generated at the output port of the line. One of the signals provides the absolute belt position, determined by one of the chains, the encoded one. The information relative to the velocity and motion direction is contained in the other AM signals generated by the motion of the other chain, periodic, and thereby, uncoded. The spatial resolution of the system, a figure of merit, is 4 mm. Special emphasis is devoted to the printing process of the belt inclusions.
KW - ALIGNMENT
KW - DIRECTION
KW - Electromagnetic encoders
KW - Microstrip technology
KW - Motion control
KW - PMSM
KW - SENSORS
KW - Screen-printing
KW - electromagnetic encoders
KW - microstrip technology
KW - motion control
KW - screen-printing
UR - http://www.scopus.com/inward/record.url?scp=85125926236&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/b48b4bbf-c905-3099-9e0b-b04801cbe87c/
U2 - 10.3390/s22052044
DO - 10.3390/s22052044
M3 - Article
C2 - 35271191
AN - SCOPUS:85125926236
SN - 1424-3210
VL - 22
SP - 2044
JO - Sensors
JF - Sensors
IS - 5
M1 - 5
ER -