scholarly journals Accurate and Efficient Representation of Obstacles Using Radar Visualizer

2021 ◽  
Vol 9 (VI) ◽  
pp. 4429-4431
Author(s):  
K. Akanksha
Keyword(s):  
Detection System ◽  
Target Position ◽  
Radar System ◽  
Motor Vehicles ◽  
Radio Waves ◽  
Receiving Antenna ◽  
Efficient Representation ◽  
Transmitting Antenna ◽  
Analyze Data

Radar is a detection system that uses radio waves to determine the range, angle or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar system consist of a transmitting antenna, a receiving antenna (often same antenna is used for transmitting and receiving) and a receiver and process to determine properties of the objects. In our project we are detecting the target position of the obstacles that come in our way be it in military, aircrafts, ships, clouds, etc. using MATLAB. Using MATLAB, you can: analyze data, develop algorithms, create models and applications. The language, apps, and build in math functions enable you to quickly explore multiple approaches to arrive at a solution. Using MATLAB and Simulink we are doing radar visualizer.

scholarly journals A ground-based, multi-frequency ice-penetrating radar system

2002 ◽  
Vol 34 ◽  
pp. 171-176 ◽  
Author(s):  
Kenichi Matsuoka ◽  
Hideo Maeno ◽  
Seiho Uratsuka ◽  
Shuji Fujita ◽  
Teruo Furukawa ◽  
...  
Keyword(s):  
Ice Sheets ◽  
Radar System ◽  
Single Frequency ◽  
Radio Waves ◽  
Subsurface Structures ◽  
Underlying Principle ◽  
Timing Difference ◽  
Single Operator ◽  
Dronning Maud Land ◽  
Data Acquisition Unit

AbstractTo better understand how ice sheets respond to climate, we designed a new multi-frequency ice-penetrating radar system to investigate subsurface structures of ice sheets. The system is mounted on a single platform and handled by a single operator. Three radio frequencies, 30,60 and 179 MHz, were used. An underlying principle of these multi-frequency observations is that the lower frequencies are more sensitive to electrical conductivity changes, whereas the higher frequencies are more sensitive to dielectric permittivity fluctuations in the ice. The system is composed of three single-frequency pulse radars, a trigger-controller unit and a data-acquisition unit. The trigger controller is the key component of this system. It switches transmitters on at different timings to prevent mixing of signals among the three radars. The timing difference was set as 50 μs, which is equivalent to the two-way travel time for radio waves reflecting from 4250m below the surface. A field test was done along a 2000 km long traverse line in east Dronning Maud Land, Antarctica. The multi-frequency system successfully acquired data that are equivalent in quality to our earlier single-frequency measurements along the same traverse line. The details of the system and preliminary data are described.

scholarly journals Analysis of the Borehole Effect in Borehole Radar Detection

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5812
Author(s):  
Wentian Wang ◽  
Sixin Liu ◽  
Xuzhang Shen ◽  
Wenjun Zheng
Keyword(s):  
Relative Permittivity ◽  
Mutual Coupling ◽  
Propagation Speed ◽  
Wave Pattern ◽  
Radar System ◽  
Circular Array ◽  
Multiple Reflections ◽  
Borehole Radar ◽  
The One ◽  
Transmitting Antenna

The directional borehole radar can accurately locate and image the geological target around the borehole, which overcomes the shortcomings that the conventional borehole radar can only detect the depth of the target and the distance from the borehole. The directional borehole radar under consideration consists of a transmitting antenna and four receiving antennas equally distributed on the ring in the borehole. The nonuniformity caused by the borehole and sonde, as well as the mutual coupling among the four receiving antennas, will have a serious impact on the received signal and then cause interference to the azimuth recognition for the targets. In this paper, Finite difference time domain (FDTD), including the subgrid, is applied to study these effects and interferences, and the influence of borehole, sonde, and mutual coupling among the receiving antennas is found. The results show that, without considering the sonde and the fluid in the borehole, the one transmitting and one receiving borehole radar system does not have resonance, but the wave pattern of the reflected wave will have obvious distortion. For the four receiving antennas of the borehole radar system, there is obvious resonance, which is caused by the multiple reflections between the receiving antennas. However, when the fluid in the borehole is water and the relative permittivity of the sonde is low to a certain extent, the resonance disappears; that is, the generation of resonance requires a large relative permittivity material between the receiving antennas. When the influence of the sonde is considered, the resonance disappears because the relative permittivity of the sonde is low, which makes the propagation speed of the electromagnetic wave between the antennas accelerate and lose the conditions for resonance. In addition, the diameters of the sonde and the circular array of the receiving antennas can affect the received signal: the higher the diameter of the sonde and the higher the diameter of the circular array are, the better the differentiation of the received signal. The development of the research provides scientific guidance for the design and application of borehole radar in the future.

scholarly journals A Printed Wearable Dual-Band Antenna for Wireless Power Transfer

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1732 ◽  
Author(s):  
Mohammad Haerinia ◽  
Sima Noghanian
Keyword(s):  
High Frequency ◽  
Flexible Substrate ◽  
Wireless Power Transfer ◽  
Dual Band ◽  
Power Transfer ◽  
Wireless Power ◽  
Dual Band Antenna ◽  
Measurement Results ◽  
Receiving Antenna ◽  
Transmitting Antenna

In this work, a dual-band printed planar antenna, operating at two ultra-high frequency bands (2.5 GHz/4.5 GHz), is proposed for wireless power transfer for wearable applications. The receiving antenna is printed on a Kapton polyimide-based flexible substrate, and the transmitting antenna is on FR-4 substrate. The receiver antenna occupies 2.1 cm 2 area. Antennas were simulated using ANSYS HFSS software and the simulation results are compared with the measurement results.

A 60 GHz passive repeater array with quasi-endfire radiation based on metal groove unit-cells

2016 ◽  
Vol 8 (3) ◽  
pp. 431-436 ◽  
Author(s):  
Duo Wang ◽  
Raphaël Gillard ◽  
Renaud Loison
Keyword(s):  
Low Cost ◽  
Normal Incidence ◽  
Main Beam ◽  
60 Ghz ◽  
Theoretical Investigations ◽  
Receiving Antenna ◽  
Unit Cells ◽  
Working Principle ◽  
Flat Profile ◽  
Transmitting Antenna

This paper describes a linear-polarized reflector that reflects incident wave almost parallel to its surface at 60 GHz, when illuminated by an impinging plane wave with normal incidence. This structure is designed as a simple and low-cost passive repeater with both a quasi-endfire radiation and a flat profile. Working as a transmission relay, it is a quite potential and possible solution to improve the radio-coverage in the T-shaped corridor, which is a typical scenario of non-light-of-sight (NLOS) environment for 60 GHz indoor communications. The proposed repeater consists of an array of parallel grooves with appropriate depths, drilled in a metallic plate. Full-wave simulations and theoretical investigations are carried out to demonstrate the working principle and to optimize the performance. Then, an 80-groove breadboard in the size of 200 mm × 200 mm is fabricated and measured to explore the feasibility of the concept. In a practical measurement, when the distance from the repeater to transmitting antenna (Tx) is 2 m, and to the receiving antenna (Rx) is 1.5 m, the repeater exhibits a main beam at ±75° with gain up to 22.7 dB. The communication between Tx and Rx in NLOS areas is thus successfully recovered.

scholarly journals MODELING OF THE DETECTION SYSTEM OF FLYING OBJECTS

Aviation ◽  
2004 ◽  
Vol 8 (2) ◽  
pp. 25-29
Author(s):  
Albertas Pincevičius ◽  
Algimantas Vyšniauskas ◽  
Pranas Jankauskas
Keyword(s):  
Normal Distribution ◽  
Surveillance System ◽  
Detection System ◽  
Quantitative Estimation ◽  
Radar System ◽  
Meteorological Conditions ◽  
Probability Of Detection

A scheme for the dislocation of 3D radar is proposed, and the process of the detection of a flying object is discussed in this paper. The formulae for the evaluation of the probability of detection of a flaying object in case of surveillance by one radar or radar system proposed. The cases are discussed when the probabilistic density of the detection of a flying object is expressed by Normal Distribution or Relay Distribution (in case of bad meteorological conditions). A quantitative estimation of a detection system with concrete parameters is done. The results of the calculation allow the efficiency of the surveillance system to be estimated. The method of calculations can be used for study or for the estimation of the systems of detection of a flying object.

scholarly journals Reception of OAM Radio Waves Using Pseudo-Doppler Interpolation Techniques: A Frequency-Domain Approach

2019 ◽  
Vol 9 (6) ◽  
pp. 1082 ◽  
Author(s):  
Marek Klemes
Keyword(s):  
Frequency Domain ◽  
Doppler Frequency ◽  
Practical Method ◽  
Far Field ◽  
Radio Waves ◽  
Antenna Structure ◽  
Transmitting Antenna ◽  
Doppler Frequency Shifts ◽  
Weighting Coefficients ◽  
Frequency Domain Approach

This paper presents a practical method of receiving waves having orbital angular momentum (OAM) in the far field of an antenna transmitting multiple OAM modes, each carrying a separate data stream at the same radio frequency (RF). The OAM modes are made to overlap by design of the transmitting antenna structure. They are simultaneously received at a known far-field distance using a minimum of two antennas separated by a short distance tangential to the OAM conical beams’ maxima and endowed with different pseudo-Doppler frequency shifts by a modulating arrangement that dynamically interpolates their phases between the two receiving antennas. Subsequently down-converted harmonics of the pseudo-Doppler shifted spectra are linearly combined by sets of weighting coefficients which effectively separate each OAM mode in the frequency domain, resulting in a higher signal-to-noise ratios (SNR) than possible using spatial-domain OAM reception techniques. Moreover, no more than two receiving antennas are necessary to separate any number of OAM modes in principle, unlike conventional MIMO (Multi-Input, Multi-Output) which requires at least K antennas to resolve K spatial modes.

An Enhanced Approach for Number Plate Detection and Recognition

2020 ◽  
Vol 13 ◽  
Author(s):  
Diksha Kurchaniya ◽  
Mohd. Aquib Ansari ◽  
Durga Patel
Keyword(s):  
Character Recognition ◽  
High Speed ◽  
Detection System ◽  
Wiener Filter ◽  
Noise Removal ◽  
Motor Vehicles ◽  
Detection Accuracy ◽  
Morphological Operations ◽  
Wide Range ◽  
High Speed Vehicle

Introduction: The number of vehicles is increasing day by day in our life. The vehicle may violate traffic rules and cause accidents. The automatic number plate detection system (ANPR) plays a significant role to identify these vehicles. Number plate detection is very difficult sometimes because each country has its own format for representing the number plate and font types and sizes may also vary for different vehicles. The number of ANPR systems is available nowadays but still, it is a big problem to detect the number plate correctly in various scenarios like high-speed vehicle, number plate language, etc. Methods: In the development of this method, we mainly used wiener filter for noise removal, morphological operations for number plate localization, connected component algorithm for character segmentation, and template based matching for character recognition. Results: Our proposed methodology is providing promising results in terms of detection accuracy. Discussion: The automatic number plate detection system (ANPR) has wide range of applications because the license number is the crucial, commonly putative and essential identifier of motor vehicles. These applications include ticketless parking fee management, parking access automation, car theft prevention, security guide assistance, Motorway Road Tolling, Border Control, Journey Time Measurement, Law Enforcement and many more. Conclusion: In this paper, an enhanced approach of automatic number plate detection system is proposed using some different techniques which not only detect the number plate of the vehicle but also recognize each character present in the detected number plate image.

GPS Inertial Missile Guidance System

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Osama Sarfaraz
Keyword(s):  
Target Position ◽  
Guidance System ◽  
Missile Guidance ◽  
Radio Waves ◽  
Current Position ◽  
Google Maps ◽  
Main Component ◽  
Missile System

<span>The task of this work is to design the guidance system for the<br /><span>missile which would guide the missile accurately to hit the target as<br /><span>directed. Guidance is the main component of the missile system which<br /><span>helps in hitting the target accurately. The missile can be guided by<br /><span>the number of ways which includes by using laser, GPS infrared or<br /><span>radio waves on its way to the target. This paper proposes a model to<br /><span>guide the missile with the help of GPS and INS. This model requires a<br /><span>computer or controller which should be installed in the missile to<br /><span>control the missile flight according to the guidance provided by GPS<br /><span>and INS. The system works by knowing the missile current position<br /><span>and the position of the target. The position of the target is known by<br /><span>using Google maps which is feed in the missile controller before the<br /><span>missile is launched. Missile current position is known by using GPS<br /><span>while the missile current orientation and heading is known by using<br /><span>INS. Missile current position is compared with the target position to<br /><span>calculate the desired heading towards the target, then missile<br /><span>controller auto pilots the missile according to the desired heading<br /><span>towards target to hit the target.</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><br /><br class="Apple-interchange-newline" /></span>

Sign in / Sign up

Export Citation Format

Share Document