METHODS AND MODELS OF CONSTRUCTION OF INFORMATION TECHNOLOGIES OF REMOTE MEASUREMENT OF NANOBRATION
DOI:
https://doi.org/10.28925/2663-4023.2020.8.2233Keywords:
laser vibrometry; vibrometers; nanovibration; Doppler effect; self-mixingAbstract
Methods and models of systems for remote measurement and recording of vibrations with amplitude less than 10 nanometers are investigated on the basis of coherent laser sources. The mathematical model of the Doppler effect is analyzed. The basic characteristics of perspective measurement systems are determined. The modern tendencies of development of the direction of laser Doppler vibrometers and the scope of their application are revealed, as well as the expediency of further researches is substantiated.
Observations of vibrations of various objects, their registration and analysis in the natural and applied sciences are one of the main methods on which the study of natural objects and phenomena, diagnostics in medicine and technology, the solution of special problems in military and law enforcement activities, ensuring information security at the objects of information activity, etc. In many cases, due to the specificity of the investigated objects, direct access to them is not possible or approaching the measurement object is unsafe for the researcher. The above determines the relevance of research into the problems and principles of building reliable information technologies for remote measurement of vibration, ensuring their high guaranteeability, including information security, resolution. Of particular interest in practical applications are technologies capable of distinguishing vibrations with an amplitude of less than 10 nanometers (hereinafter referred to as nanovibrations).
Therefore, to select the essential parameters of designing a domestic product (laser vibrometer) and look for opportunities to increase the sensitivity of such products, the article elaborated and formed a set of qualitative and technical characteristics of existing devices for remote measurement of nanovibrations and provided comments on the solution of the sensitivity problem.
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