Integrated measurement and recording of loads, displacements and electromagnetic emission in rocks under uniaxial compression

Abstract

The authors describe an automatized three-channel system intended for joint recoding of loads, displacements and electromagnetic emission in rock samples subjected to uniaxial compression testing. This system includes an optoelectronic displacement sensor. The developed and tested controller and computer product allow synchronous three-channel recording, analysis and processing of experimental data, and displaying of the analytical results.

Improving the Accuracy of Estimates of the Pulse Sequence Period Using the Methodology of Complete Sufficient Statistics

“…where, k t + , k t − are the times of intersection of the leading and trailing pulse edges (10), k i is the number of the pulse in the sequence.…”

“…The traditional field of application for devices that solve such problems are: radars [1], communication systems [2], [3] and electronic intelligence [4]. However, the range of applications much wider and includes, for example, the assessment of the parameters of X-Ray absorption spectra [5], Bragg scattering [6], plasma parameters [7,35], assessment of the stability of the information system [8], the solution of the problem of the parameter estimation for in-line flaw detection [9], or the development of an optoelectronic displacement sensors [10], which are used in the oil and gas industry.…”

Improving the accuracy of estimates of the pulse sequence period using the methodology of complete sufficient statistics

“…At the same time, there is a growing demand for the synthesis of new algorithms for solving problems of estimating signal parameters in a wide range of applications: radars 2 , communication systems 3 , 4 , electronic intelligence 5 , X-Ray absorption spectra 6 , Bragg scattering 7 , plasma parameters estimation 8 , 9 , assessment of the stability of information systems 10 , the solution of the problem of parameter estimation for in-tube flaw detection 11 , the development of optoelectronic displacement sensors 12 , etc. The requirements for the accuracy of the assessment and its reliability are increasing, which determines both the use of more productive computing resources and determines the relevance of the search for new information processing algorithms.…”