Effect of changing of the parameters of the cable network of monitoring systems of high-rise buildings on the basis of string converters on their operability

Nikolay Gusev,Larisa Svatovskaya,Alexandr Kucherenko,D Safarik,Y Tabunschikov,V Murgul

doi:10.1051/e3sconf/20183302069

Nikolay Gusev, Larisa Svatovskaya + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/20183302069

Copy DOI

Abstract

The article is devoted to the problem of improving the reliability of monitoring systems for the technical conditions of high-rise buildings. The improvement is based on string sensors with an impulsed excitation method ensuring the maximum signal-to-noise ratio at their output. The influence of the parameters of the monitoring system on the shape of the excitation impulses of the string, and, consequently, on the amplitude of the string vibration of the string converter is also considered in the article. It has been experimentally proved that the parameters of the excitation impulses of the string converters. The article presents the results of the experiments showing the effect of the fronts duration of the excitation impulses on the amplitude of the oscillations of the strings. The influence of the fronts duration of the excitation impulse with the frontal lengths up to 0.5 ms is studied at the excitation impulse duration not exceeding 0.5 times the duration of natural oscillation periods of the string. The experimental data are compared with the theoretical ones and hypotheses explaining their difference are advanced. The article suggests some methods of reducing the influence of the cable-switching equipment system parameters on the amplitude of string oscillations. The possibilities of improving the reliability of the systems developed on the basis of string sensors with an impulsed excitation method and used for monitoring the technical conditions of the high-rise buildings are proposed.

Highlights

The method of measurement by using string converters is based on the dependence of the frequency of the frequency resonator oscillation on the string extension stress which in each particular string converter is proportional to the measured parameter Р
The force impulse excites the damped oscillations of the string y by "pinch" that induce е, the frequency, or the period Т in the electromagnetic coil е, which can be measured up to some preassigned value of the amplitude determined by interference level corresponding to the minimum value ymin string oscillation amplitude
For f

Summary

Introduction

In the terminology of the Ministry of Emergency Situations of the Ministry of Emergency Situations [11-13], such systems were called SMES (structured systems for monitoring and managing the engineering systems of buildings and structures) In hydraulic engineering such systems have received the name ASDC - automated systems of the diagnostic control [14-17]. To excite the string vibrations of the string measuring transducers with impulse excitation (STMS) electromagnetic coils are used. The force impulse excites the damped oscillations of the string y by "pinch" that induce е, the frequency , or the period Т in the electromagnetic coil е, which can be measured up to some preassigned value of the amplitude determined by interference level corresponding to the minimum value ymin string oscillation amplitude. The value of the gap for commercially available STMS lies in the range 0.35 ÷ 0.50 mm [17]

Methods

Results

Discussion

Conclusion