NON-CONTACT, SHORT DISTANCE MEASURING SYSTEM FOR WIDE APPLICATIONS

Sergey Yurish

Abstract

A low-cost, accurate, non-contact, short distance measuring system is described in the paper. It includes a standard infrared light source, infrared light-to-frequency converter and specially designed for such applications the Universal Sensors and Transducers Interface (USTI) integrated circuit. In comparison with existing solutions, the designed measuring system has extended distance measuring range from 5 to 200 mm, 0.01 mm resolution, ±0.02 mm absolute error and a short conversion time that does not exceed 26.35 ms. Performance improvements are achieved due to a novel, precision modified method of the dependent count for frequency measurements with a non-redundant conversion time, which is used in the USTI.

Keywords

distance measurement systems, optical sensors, universal sensors and transducers interface

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IMEKO-WC-2009-TC4-090.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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