EXPERIMENTAL INVESTIGATION OF A PIEZOOPTICAL CONVERTER FOR HIGH-SENSITIVE STRAIN GAUGES
A. G. Paulish1, P. S. Zagubisalo1, V. N. Barakov2, M. A. Pavlov2
1Design and Technology Institute of Applied Microelectronics, Siberian Branch, Russian Academy of Sciences, prosp. Akademika Lavrent'eva 2/1, Novosibirsk, 630090
2PODII company, ul. Myasnitskaya 47, Moscow, 107084
Keywords: измерение деформации, датчики деформации, пьезооптический преобразователь, метод фотоупругости, оптические методы исследования напряжённых состояний, strain measurement, strain gauges, piezooptic transducer, photoelasticity method, optical methods for studying stress states
Abstract
The characteristics of a piezo-optical converter of a new design, which has small dimensions and high sensitivity to deformation. The original form of the photoelastic element makes it possible, at a given external force, to considerably increase the voltage in its working area, thereby increasing the sensitivity of the converter. The main characteristics of the converter were measured using a specially designed device. The developed mathematical model of the converter made it possible to calculate the strain at a given applied force. As a result, the sensitivity to the relative deformation was Δx/x = 3 x 10-10, the dynamic range is more than four orders higher and the strain sensitivity coefficient is three orders of magnitude higher compared to strain-gauge sensors.
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