ISSN 0021-3454 (print version)
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8
Issue
vol 61 / AUGUST, 2018
Article

DOI 10.17586/0021-3454-2018-61-6-539-548

UDC 681.78

RESEARCH IN THE INFLUENCE OF TEMPERATURE ON THE ERROR OF INCREMENTAL CONVERTERS OF LINEAR DISPLACEMENTS, BASED ON RASTER STRUCTURES

S. V. Mednikov
ITMO University; Department of Optical-Electronic Devices and Systems; Engineer


A. N. Timofeev
ITMO University, Saint Petersburg, 197101, Russian Federation; Senior scientific researcher


A. S. Vasiliev
ITMO University ; Postgraduate


A. V. Prokofjev
ITMO University; Department of Optical-Electronic Devices and Systems;


Abstract. The influence of temperature on the error of incremental optoelectronic encoders of linear displacements based on raster structures, is considered. Basic principles of optoelectronic encoders of linear displacements are described. The performed theoretical analysis of additional error because of ambient temperature fluctuations demonstrates that the greatest influence is exerted by changes in the linear dimensions of the raster structures caused by linear expansion of the raster material. Results of experimental studies of the error of the LIR-14 encoder caused by changes in the ambient temperature are presented, and an estimate is given of the degree of influence of the error components due to this phenomenon.
Keywords: linear incremental encoder, line raster, raster modulation method, signal interpolation principle

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