Radovan Hajovsky

Radio Telemetry Unit for Online Monitoring System at Mining Dumps

The paper deals with the description of complex monitoring system for remote monitoring of thermal processes, concentration of toxic gases and dustiness of the atmosphere. Each of these quantities is measured and consequently processed by use of wireless modules communicating with supervisor system. It presents design of communication among particular sensors and further data processing and transfer to the dispatching center.

Long term temperature monitoring and thermal processes prediction within mining dumps

The paper deals with the description and results of long-term monitoring of thermal processes within the old coal dumps in Ostrava region. It presents methods and means of temperature measurements by specially installed temperature probes, including further wireless data transfer to dispatching center. The paper also discusses the possibility of creating predictive algorithm to predict changes of thermal processes inside the dumps, particularly increasing or decreasing temperature gradients and direction of propagation.

Application of PIL Approach for Automated Transportation Center

The paper describes the idea of design and implementation of Processor-in-the-loop (PIL) model of Automated Transportation Center (ATC) designed as a heavy laboratory operated by VSB-Technical University of Ostrava. It contains technical description of the real technology, the main concept of PIL model and its particular solution for ATC. As for means of design and implementation, the REX Control system was used as a real-time target running on ALIX system board that handles the software model of real technology while the real control system based on Simatic PLCs stays unchanged. The communication between PLCs and ALIX is provided by PROFINET protocol while all of the original I/O signals are re-mapped to match the PROFINET communication standard.

Using measurement, data analysis and modelling for research borehole polygons

This paper deals with using measurement, data acquisition, data analysis, and modeling for real technology of two research borehole polygons, located at the district of VSB — Technical University of Ostrava. The first part of this paper is focused on some technical description of the Big Research Polygon and the Small Research Polygon (e. g. borehole equipment, temperature conditions, data acquisition systems etc.). The second part briefly describes how the data are processed and analyzed via user-developed applications based on IDEs of Microsys Promotic and NI LabVIEW, whereas each of these applications can offer some specific way how to process online or offline data from SRP boreholes only. A purpose of the applications is to help user visualize and analyze data efficiently. The third part, the most important one, is centered on mathematical modeling, which can be used for practical design of borehole polygons. There is some borehole dimensioning approach based on Fourier differential equation and other equations, knowledge, and parameters useful for computational algorithms of sophisticated modelling software applications such as EED, SVHeat, and PetraSim (their features are mentioned), whereas only EED borehole design process and its results are discussed.

Using the IQRF Technology for the Internet of Things: Case Studies

This article focuses on describing the IQRF technology following modern trends in the Internet of Things. There is a brief overview of the IQRF technology and then selected examples of its use in areas such as Smart Cities, Smart Parking, Smart Lighting etc. Practical examples of the use of devices developed in conjunction with the Internet of Things are provided in more detail. From the field of systems based on Inernet of Things were chosen two use cases. First of them is monitoring of concentration of carbon monoxide in old mine dumps and second one is about of monitoring of building stability using a wireless inclinometer.

Monitoring Environmental Variables Through Intelligent Lamps

The article describes the design and realization of a smart streetlight prototype. The lamp is designed to implement a comprehensive system of Smart Cities and Smart Lighting in the research and development of IoT issues. In addition to the possibility of wireless switching, the lamp contains switching and dimming, as well as sensors for measuring temperature, humidity, and pressure, and it is equipped with a PIR sensor for switching the lamp when a person passes through its active field. All communication with the parental system, including the collection and processing of data is performed by IQRF technology. It also allows the creation of an extensive IQMESH network of these lamps.

Using MATLAB and COMSOL Multiphysics for Optimization of the Model of Underground Thermal Processes at Old Mining Dumps

The paper deals with the use of MATLAB and COMSOL Multiphysics environments for solution of optimization problem regarding underground thermal processes occurring at the old mining dumps affected by subsurface endogenous fires. It gives the description of measurement system and physical setup of the experimental borehole used to provide the real measured data for the model with the aim of its verification. The optimization problem is defined and solved by proposed computational technique that uses both MATLAB and COMSOL Multiphysics with the LiveLink tool that integrates these environments. Results of the optimization help to evaluate the total or relative heat power of the mass within mining dump.

Using TRT for determining the essential thermal parameters of rock massif

This paper deals with problems of thermal response test (TRT) in connection with determining the essential borehole parameters, mainly thermal conductivity and borehole resistance. In practical use, these parameters are usually prescribed by tables; in case of larger buildings, it is required to measure them in situ. This paper also includes detailed mathematical background, focused on the TRT. For comparison, there are some described and discussed results from several experimental TRT measurements, done in year 2011 in the Ostrava region.

Usage of Web Applications for Monitoring of Geothermal Systems

Abstract This paper deals with a description of a unique system for borehole temperature measurement, and its consequent Web application for data visualization based on OPC communication and FTP access. There are some short descriptions of the Big Research Polygon (BRP), and the Small Research Polygon (SRP) - main parts of the largest heating system with heat pumps in the Czech Republic. They serve not only for scientific and education purposes, but also for problem of renewable energy resources. Each of these boreholes contains some temperature sensors (analogue, digital) connected to some PLC/PAC systems for data acquisition, data processing, and their saving to a measurement file. A Web application uses possibility of dynamic HTML pages created in PHP programming language. Current version of this application reshapes measurement data (from boreholes and heat pumps) into some general tables in dependence on borehole competency, and heat pump parameters, such as mass-flow, density, or volume-flow. In the future it is planned to use MS SQL database system.

The complex system for the rock massif measurement of temperature parameters

This paper brings information about research activities of temperature measurement in boreholes. The described research is focused on unique geothermal boreholes system used for heat pumps applications. The first part of the contribution deals with long time measurement of the temperatures in boreholes used in heat pump installation. A system for monitoring and evaluation of temperatures in measurement polygon is presented. The second part is focused on measurement of thermal profile of the borehole. The paper does not evaluate geothermal properties of the boreholes but it describes the measurement issues and methods.