Dissertation thesis

The aim of the thesis is the use of magnetic and electromagnetic field disruptions in different frequency ranges caused by UAV presence for the intrusion detection in the protected area of interest. The realization of this aim requires the analysis of signal disturbances in multisensory system caused by the UAV presence, identification of interfering signals and design of the detection equipment and detected signal processing algorithms.

The aim of the thesis is the use of innovative methods for the calibration of 3D magnetic field sensors. The realization of this objective requires deep general theoretical analysis of methods for vector field sensors calibration, the design of new algorithms by using neural networks and to build calibration workstation for 3D magnetic sensors.

Creation of effective acquisition, processing, storing and signal visualisation multisensor system designed for a real unmanned aerial vehicle, creation of a multisensor network for several unmanned aerial vehicles and solution of a mutual sharing, eventually transmission of measured signals within the network and to a ground control station, creation of a 3D model of an unmanned aerial vehicle, movement visualisation of an unmanned aerial vehicle in a real environment.

Analysis, proposal and realisation of new methods of the control and position stabilisation of multirotor unmanned aerial vehicles using quantities of physical fields. Practical realization of a microprocessor multisensor subsystem. Algorithmization of position and motion stabilization around the centre of gravity applied to a quadrocopter.

Sensors based on the magnetic microwires are perspective especially for the technical practice mainly because of their contactless diagnostics or presence registration of the determined operational states, on the other side their massive extension is currently limited also because of the missing measurement methods and signal processing systems convenient for the real practise. Utilization of selected effects, especially of the GMI, design, realization and verification of specific versions of sensors of physical quantities and states can bring new knowledge and experimental verification of multiple possible sensor effects. An expected scientific contribution is detection and analysis of phenomena occurring by the attempts to use the sensor effects, such as noise, instability, cros-sensitivity and so on. Experimental verification of several possible sensor effects, analysis of their convenient and disadvantageous characteristics considering the demandingness of the sensor realization and possible practical utilization. The progress, which will be achieved in the dissertation thesis with the specified topic, will contribute to a practical utilization of the examined sensor type.

The goal of the thesis is to realize a precise magnetometer for archaeological and geophysical applications; to design the methodology of the measured data processing, visualisation and interpretation.

On the selected construction steels prepared by the powder metallurgy to apply modern methods of their coating and to consider their influence on the basic tribologic (contact fatigue, abrasion) characteristics. In the area of the contact fatigue to determine the influence of the coating on the lifetime of the materials, to describe mechanism of the damage and to determine possibilities of the prognosis. In the area of the abrasion resistance to determine friction coefficients, kinetics and abuse type in the dry conditions and by the lubricant utilization. Possibly to find correlation between the wear and lifetime by the contact fatigue.

Current state in the area of control of complex multisensor systems, for example of UAVs, aviation robotic platforms or special servo frames; solution of modern approaches in the system control, of sensor signal integration and fusion and with the coordinate systems and their shifts, rotations and transformations.

Current state in the sensor effects on magnetic microwires, physical principles of GMI and movement of the domain wall; current state of the sensors based on the magnetic microwires, with the emphasis placed on principles using bistable magnetic microwires, state in the mathematical signal processing and in the field of electronic systems for signal processing on the basis of microwires.

Current state in the area of sensor integration, mainly in navigation systems and state in the mathematical signal processing; available SW for mathematical processing with the emphasis on the open-source.

Current state in the area of multisensor systems' construction; design of the digital electronics of a 4-channel magnetometer; design of the software conception of the 4-channel magnetometer.

Current state in the area of construction of multisensor systems with the intention of the safety and security technology. The dissertation thesis process on the basis of the latest scientific knowledge from the area of industry, aviation technology and intelligent buildings construction.

Current state in the area of special induction sensors with the intention on gradient sensors; current state of sensor of the KDP systems and proposal of possible alternatives; mathematical models of induction sensors and models in the QuickField software; analysis of the characteristics determination methodologies.

Current state in the area of magnetic microwires; possibilities of technical applications of bistable magnetic microwires; experimental measurement of magnetic characteristics of microwires; conception of a workstation for decoding of magnetic tags based on the microwires.

Issue of multisensor systems' construction with the intention on the safety and security technology in the area of industry, aviation technology and construction of intelligent buildings.

Contact fatigue; analysis of current state in the area and of the literature, which deals with the examined issues; selection of solution methods of the dissertation project.

Realization of practical measurements of weak stationary and low-frequency magnetic fields using spatially arranged sensors; utilization of conventional statistical methods for analysis, synthesis and time-spatial visualization of measured signals; application of methods and procedures used in the chaos theory for the investigation of ties among values of the time series and search of orderliness by the time-spatial visualization of measured data.

Realization of systems for measurement and monitoring of sources and distributions of 50 Hz on the basis of 4-channel magnetometers; realization of software and hardware; utilization of the realized system on low-flying objects; analysis of utilization possibilities of the system for the detection of illegal electric power consumption.

Proposal and practical realization of subsystems for vector measurement of linear accelerations, angular rates, local magnetic fields and speed velocity using MEMS sensors and microcontrollers; experimental determination of static and dynamic transfer characteristics of the used sensors; integration of subsystems using an industrial computer, design and realization of a software for a visualisation and record of measured signals; proposal of algorithms for the movement trajectory description for application utilization.

Multichannel sensors of magnetic fields; conception of a magnetometric server; network operation of a group of magnetometric servers; realization of the server software; user software; application software.

Creation of a digital area map of the area of interest; virtualization of board equipment of a moving object; object motion visualization in the area; design and realization of a object motion model control.