scholarly journals ASSESSMENT OF THE QUALITY OF RADIO COMMUNICATION CHANNELS OF UNMANNED AERIAL SURVEILLANCE SYSTEMS

2021 ◽  
pp. 44-52
Author(s):  
V. Ilienko ◽  
M. Gerashchenko ◽  
A. Los ◽  
O. Sautin ◽  
O. Siryk
Keyword(s):  
Radio Emission ◽  
Radio Frequency ◽  
Frequency Control ◽  
Surveillance Systems ◽  
Radio Communication ◽  
Aerial Surveillance ◽  
Emission Frequency ◽  
Instrumental Evaluation ◽  
Video Information ◽  
Radio Transmitters

Unmanned aerial vehicles (UAVs) allow effective solving the problems of reconnaissance, relaying information on targets to means of fire destruction and striking on any type of object. However, there are many problematic issues regarding the creation of a communication system for remote control of UAV of medium and long range, obtaining video information about reconnaissance objects in real time. The methods allow to estimate the value of the deviation of the carrier frequency of the transmitter of the radio communication channel of unmanned aerial system (UAS) in the normal mode of its operation from the value of the prototype stated by the Developer based on the instrumental measurement of the average or assigned frequency of modulated radio emission. The purpose of the article is to consider the methods, technical means and conditions of instrumental evaluation of the radio emission frequency of UAV‟s radio channels transmitters by means of radio frequency control. This technique defines a set of procedures and rules for instrumental evaluation (measurement) of radio frequency of UAVs prototypes radio transmitters by means of radio frequency control in order to verify compliance of its parameters with the requirements of technical conditions or specifications for experimental aircraft.

scholarly journals Uses of radio emission spectroscopy for non-contact and in situ diagnostics of low pressure radio frequency plasma processing

2021 ◽  
Author(s):  
Rajani K. Vijayaraghavan ◽  
Sean Kelly ◽  
David Coates ◽  
Cezar Gaman ◽  
Niall MacGearailt ◽  
...  
Keyword(s):  
Radio Emission ◽  
Radio Frequency ◽  
Emission Spectroscopy ◽  
Near Field ◽  
Plasma Processing ◽  
Diagnostic Technique ◽  
Primary Source ◽  
Low Pressure ◽  
Chamber Pressure ◽  
Rf Plasma

Abstract We demonstrate that a passive non-contact diagnostic technique, radio emission spectroscopy (RES), provides a sensitive monitor of currents in a low pressure radio frequency (RF) plasma. A near field magnetic loop antenna was used to capture RF emissions from the plasma without perturbing it. The analysis was implemented for a capacitively coupled RF plasma with an RF supply at a frequency of 13.56 MHz. Real-time measurements are captured in scenarios relevant to contemporary challenges faced during semiconductor fabrication (e.g. window coating and wall disturbance). Exploration of the technique for key equipment parameters including applied RF power, chamber pressure, RF bias frequencies and chamber wall cleanliness shows sensitive and repeatable function. In particular, the induced RES signal was found to vary sensitively to pressure changes and we were able to detect pressure and power variations as low as ~2.5 %/mtorr and ~3.5 %/watt, respectively, during the plasma processing during a trial generic plasma process. Finally, we explored the ability of RES to monitor the operation of a multiple frequency low-pressure RF plasma system (f1 = 2 MHz, f2 = 162 MHz) and intermixing products which suggests strongly that the plasma sheaths are the primary source of this non-linear diode mixing effect.

The study of the emission frequency control system stability in hydropulse generator

2017 ◽  
Author(s):  
Andrey A. Kapelyuhovskiy ◽  
Alexandra A. Kapelyuhovskaya ◽  
Elena P. Stepanova
Keyword(s):  
Control System ◽  
Frequency Control ◽  
System Stability ◽  
Emission Frequency ◽  
Frequency Control System

Radio Frequency IdentificationTechnology in Digital Government

2011 ◽  
pp. 1294-1304
Author(s):  
Les Pang
Keyword(s):  
Radio Frequency ◽  
Vehicle Tracking ◽  
Surveillance Systems ◽  
Rfid Technology ◽  
Digital Government ◽  
Bar Codes ◽  
Commercial Use ◽  
Toll Collection ◽  
The 1960S ◽  
In The Beginning

Following technical strides in radio and radar in the 1930s and 1940s, the 1950s were a period of exploration for radio frequency identity (RFID) technology as shown by the landmark development of the long-range transponder systems for the “identification, friend or foe” for aircraft. Commercial use of RFID appeared in the 1960s, such as electronic article surveillance systems in retail stores to prevent theft. The 1970s were characterized by developmental work resulting in applications for animal tracking, vehicle tracking, and factory automation. RFID technology exploded during the 1980s in the areas of transportation and, to a lesser extent, personnel access and animals. Wider deployment of RFID tags for automated toll collection happened in the 1990s. Also, there was growing interest of RFID for logistics and having it work along side with bar codes. In the beginning of the 21st century, the application of RFID technology has been ubiquitous and now it is practically part of everyday life (Landt, 2001).

scholarly journals A Face Image Virtualization Mechanism for Privacy Intrusion Prevention in Healthcare Video Surveillance Systems

Symmetry ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 891 ◽  
Author(s):  
Jinsu Kim ◽  
Namje Park
Keyword(s):  
Video Surveillance ◽  
Visual Information ◽  
Face Image ◽  
Video Data ◽  
Surveillance Systems ◽  
Image Information ◽  
Video Information ◽  
Face Area ◽  
Blockchain Technology ◽  
Wide Range

Closed-circuit television (CCTV) and video surveillance systems (VSSs) are becoming increasingly more common each year to help prevent incidents/accidents and ensure the security of public places and facilities. The increased presence of VSS is also increasing the number of per capita exposures to CCTV cameras. To help protect the privacy of the exposed objects, attention is being drawn to technologies that utilize intelligent video surveillance systems (IVSSs). IVSSs execute a wide range of surveillance duties—from simple identification of objects in the recorded video data, to understanding and identifying the behavioral patterns of objects and the situations at the incident/accident scenes, as well as the processing of video information to protect the privacy of the recorded objects against leakage. Besides, the recorded privacy information is encrypted and recorded using blockchain technology to prevent forgery of the image. The technology herein proposed (the “proposed mechanism”) is implemented to a VSS, where the mechanism converts the original visual information recorded on a VSS into a similarly constructed image information, so that the original information can be protected against leakage. The face area extracted from the image information is recorded in a separate database, allowing the creation of a restored image that is in perfect symmetry with the original image for images with virtualized face areas. Specifically, the main section of this study proposes an image modification mechanism that inserts a virtual face image that closely matches a predetermined similarity and uses a blockchain as the storage area.

scholarly journals Creación de una aplicación para control de un coche de radiofrecuencia en dispositivos que usen IOS / Creating a car radio frequency control application for IOS devices

2016 ◽  
Vol 4 (7) ◽  
pp. 54
Author(s):  
Borboa Jaimes Aarón Antero ◽  
Daniel Cardoso Jiménez ◽  
Valentín Rafael Mendoza Méndez ◽  
Baena Castro Gisela
Keyword(s):  
Radio Frequency ◽  
Frequency Control ◽  
Control Application

El objetivo fue crear una aplicación que controle un coche de radiofrecuencia en dispositivos que usen iOS, utilizando los siguientes materiales: una Mac Book Air 13”, una licencia como desarrollador de Apple y software XCode.El costo de la aplicación es gratuito ya que ayuda a patrocinar algunas empresas que se publicitan al momento de ejecutar la aplicación. Una de las ventajas de este proyecto es que la tecnología utilizada (bluetooth), es más precisa que otras que no pueden manejar el coche de radiocontrol en exteriores.Puesto que se enlaza para su conexión segura, el ahorro de baterías es mejor y su duración mayor. Aunque el costo es un poco más alto, la potencia aumenta favorablemente. El diseño de la aplicación es simple y fácil de comprender por personas de cualquier edad. Muestra un margen de error mínimo: del 5 %, pero si se presenta el caso, la aplicación se cierra por sí sola para después reiniciarse normalmente.En conclusión, se logró el objetivo de crear una aplicación que controle a un coche de radiocontrol. Dicha aplicación maneja una comunicación óptima y fácil de utilizar, y aunque su costo es un poco más elevado, su potencia es mucho mayor en comparación con la del modelo anterior. Asimismo, se evitaron gastos innecesarios en baterías al sustituir tecnología de comunicación (bluetooth), satisfaciendo al usuario.

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