<\/i>Measurement of large antenna systems<\/h4><\/a><\/li>
<\/i>Electromagnetic field sensors<\/h4><\/a><\/li>
<\/i>Sensors of physical quantities<\/h4><\/a><\/li>
<\/i>EMP of biological objects<\/h4><\/a><\/li><\/ul><\/div>
<\/i>Measurement of large antenna systems<\/h4><\/a><\/li><\/ul><\/div>
\nTask<\/span><\/b><\/h2>\n
Find and validate a new method for diagnosing a damaged segment of a large antenna system. Solution<\/strong>
\nHybrid method:
\n– calculation of directional characteristics of a large antenna system using known geometry and electrical properties of individual antennas,
\n– measurement of directional characteristics using a drone,
\n– mathematical processing. Contributions<\/strong>
\n– ability to analyze and synthesize passive high-frequency devices such as lines, radiators, splitters, combiners, and signal routers,
\n– ability to match a load to a generator,
\n– ability to measure high-frequency circuit parameters,
\n– ability to diagnose large-scale high-frequency systems,
\n– ability to design a high-frequency path in an antenna counting system,
\n– ability to design a high-frequency path in an antenna counting system, – ability to design a high-frequency path in an antenna counting system, – ability to design a high-frequency path in an antenna counting system, – ability to design a high-frequency path in an antenna counting system. Ability to design a solution, defend the solution, present the solution, and work collaboratively in a team to implement the solution.<\/p>\n<\/p>\n
The picture shows a view of the antenna system (AS) installed on the monorail. The AS in this case is designed for FM radio broadcasting. As we can see the antennas are large, uncovered and thus stressed by weather in winter and summer. The lifetime of AS is calculated in decades and thus towards the end of their lifetime problems and failures of individual antennas occur. <\/p>\n
Use<\/h3>\n
We have developed a method at the UE that determines the damaged antenna with certainty based on measurements in the directional characteristics of the AS in the E and H planes and by calculating the AS properties using a numerical method (ideally MoM). This method can be used when both the damaged AS and other systems located on the monorail are in full operation. The method saves time, money and maintenance time (AS decommissioning time). <\/p>\n
Benefits:<\/p>\n
- <\/i><\/span>\n
International scope<\/strong> – The same AS, and the same diagnostic problems are encountered not only by workers in Slovakia but wherever large antenna systems are used are stressed by weather<\/p>\n<\/div><\/li>
- <\/i><\/span>
\nModern method<\/strong> – With the creation of the AS database, diagnostics is relatively simple, without the need to shut down the transmitter<\/p>\n<\/div><\/li>
- <\/i><\/span>
\nStrong collaboration<\/strong> – Bringing science together with a strong partner brings new practical challenges to be tackled<\/p>\n<\/div><\/li>
- <\/i><\/span>
\nDoctoral studies<\/strong> – Enriching the topics of doctoral studies with practical problems<\/p>\n<\/div><\/li>
- <\/i><\/span>
\nWe are not just theoreticians<\/strong> – A topic that does not stay in a drawer<\/p>\n<\/div><\/li><\/ul>
<\/div>\n<\/div><\/i>Electromagnetic field sensors<\/h4><\/a><\/li><\/ul><\/div>
\nTask<\/span><\/b><\/h2>\n
To develop a broadband low-cost and accurate electromagnetic field sensor for use in measuring hygienic radiation limits. Solution<\/strong>
\nModified resistive dipole:
\n– Analysis of the properties of the modified resistive dipole,
\n– Measurement of the amplitude-current-frequency characteristics and comparison with a standard resistive dipole,
\n– Design of the antenna deployment,
\n– Design of the electronics design,
\n– Data collection using IoT,
\n– metrological properties of the sensor,
\n– physical properties of the sensor Benefits<\/strong>
\n– low cost broadband sensor,
\n– excellent metrological parameters
\n– ability to connect the sensor to an international monitoring network,
\n– ability to monitor online the electromagnetic parameters of the environment<\/p>\nIn the picture we can see the Akrim electromagnetic field strength meter, which was developed at the former Department of Measurement – in the Electromagnetic Compatibility Laboratory (if you are interested, you can download a publication on this subject here<\/a>). Despite the advanced age, the principle of the sensor has not yet bitten the dust. In the world literature we can find a number of its clones, which are used for ultra wide frequency characteristic. The sensing element can be discretized while retaining all its positive properties. This concept will form the basis of the new sensor. <\/p>\n
Use<\/h3>\n
Nowadays we measure almost everything, smog, exhalates, storm clouds, humidity, temperature, air quality… We just somehow forget that there is an invisible electromagnetic field (EMF) around us that also affects the quality of the environment we live in. Some developed countries have woken up, but we are still asleep. The EMF sensor being developed is to be one of the first swallows to bring about an awakening. Its task will not only be to sense the individual frequency components of EMFs and their intensity, but also to transmit this data to an international network which contains a database of a number of sensors located in various European cities. <\/p>\n
Benefits:<\/p>\n
- <\/i><\/span>\n
International scope<\/strong> – Cooperation with Serbia. Joint solution to the problem of hygienic EMF measurements<\/p>\n<\/div><\/li>
- <\/i><\/span>
\nThe modern method<\/strong> – Connecting to a sensor network across Europe<\/p>\n<\/div><\/li>
- <\/i><\/span>
\nStrong collaboration<\/strong> – Bringing science together with a strong partner brings new practical challenges to tackle<\/p>\n<\/div><\/li>
- <\/i><\/span>
\nDoctoral studies<\/strong> – Enriching the topics of doctoral studies with practical problems<\/p>\n<\/div><\/li>
- <\/i><\/span>
\nWe are not just theoreticians<\/strong> – A topic that does not stay in a drawer<\/p>\n<\/div><\/li><\/ul>
<\/div>\n<\/div><\/i>Sensors of physical quantities<\/h4><\/a><\/li><\/ul><\/div>
\nTask<\/span><\/b><\/h2>\n
Create a single-component force sensor, pressure, … with non-contact information transmission. Solution<\/strong>
\nExploiting electromagnetic phenomena of the near electromagnetic field:
\n– Analysis of the influence of passive structures on the change of the emitter properties,
\n– S11 characteristic pre-current carrying information about the incident\/acting physical quantity,
\n– Quantification of the transfer characteristic,
\n– Emergence of MEMS structures,
\n– emergence of sensors with interesting topology and properties, Benefits<\/strong>
\n– new principle of information transfer,
\n– sensor unencumbered by the error created by the momentum of the signal conductors,
\n– sensor with excellent dynamic properties,
\n– wide range of applications of sensors – e.g. tire pressure<\/p>\nIn the picture we can see the Akrim electromagnetic field strength meter, which was developed at the former Department of Measurement – in the Electromagnetic Compatibility Laboratory (if you are interested, you can download a publication on this subject here<\/a>). Despite the advanced age, the principle of the sensor has not yet bitten the dust. In the world literature we can find a number of its clones, which are used for ultra wide frequency characteristic. The sensing element can be discretized while retaining all its positive properties. This concept will form the basis of the new sensor. <\/p>\n
Use<\/h3>\n
Nowadays we measure almost everything, smog, exhalates, storm clouds, humidity, temperature, air quality… We just somehow forget that there is an invisible electromagnetic field (EMF) around us that also affects the quality of the environment we live in. Some developed countries have woken up, but we are still asleep. The EMF sensor being developed is to be one of the first swallows to bring about an awakening. Its task will not only be to sense the individual frequency components of EMFs and their intensity, but also to transmit this data to an international network which contains a database of a number of sensors located in various European cities. <\/p>\n
Benefits:<\/p>\n
- <\/i><\/span>\n
International scope<\/strong> – Cooperation with SAV and SLM, n.o. Joint problem solving<\/p>\n<\/div><\/li>
- <\/i><\/span>
\nModern method<\/strong> – Sensors find applications e.g. in the automotive industry<\/p>\n<\/div><\/li>
- <\/i><\/span>
\nStrong collaboration<\/strong> – Science and technology departments have come together to enable the development of new types of sensors and new principles for sensing physical quantities<\/p>\n<\/div><\/li>
- <\/i><\/span>
- <\/i><\/span>
- <\/i><\/span>
- <\/i><\/span>
- <\/i><\/span>
- <\/i><\/span>
- <\/i><\/span>
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