scholarly journals Comparing and Analysis of Test and Evaluation Methods for Connected Vehicle Communication Antenna System

2021 ◽  
Vol 2108 (1) ◽  
pp. 012007
Author(s):  
Tong Zhu ◽  
Guotian Ji ◽  
Guokai Jiang ◽  
Yifu Ding ◽  
Jiaxu Feng ◽  
...  
Keyword(s):  
Fast Response ◽  
Evaluation Methods ◽  
Antenna System ◽  
System Evaluation ◽  
Connected Vehicle ◽  
Evaluation Program ◽  
Vehicle Communication ◽  
Test And Evaluation ◽  
Wide Range ◽  
Antenna Systems

Abstract With the development of Connected Vehicle, various of on-board applications and functions rely on stable, reliable and fast-response wireless connections furtherly, making it more urgent and widespread for vehicles to be equipped with relevant antenna systems such as positioning and communication. There are many types of vehicle antenna systems, together with a wide range of installation locations and a complex electronic environment which brings a huge challenges to the development of antenna manufacturers and the matching of automobile OEMs. In order to carry out the R&D, matching and testing of the vehicle antenna system better, various parties have proposed a multi-dimensional test and evaluation methods, but there is still a lack of horizontal evaluation between them. This paper analyses the requirements of automotive antenna system evaluation, sorts out and compares the technical paths of various common solutions, summarizes the characteristics and differences of various solutions, and provides a research foundation for further optimizing the vehicle-level antenna system test and evaluation program.

scholarly journals DEVELOPMENT OF CONCEPT OF HARDWARE-SOFTWARE COMPLEX OF MODULAR DESIGN FOR DETERMINATION OF ANTENNA SYSTEMS׳ CHARACTERISTICS BASED ON MEASUREMENTS IN THE NEAR FIELD

2017 ◽  
Vol 8 (2) ◽  
pp. 151-159 ◽  
Author(s):  
A. G. Buday ◽  
A. P. Grinchuk ◽  
A. V. Gromyko
Keyword(s):  
Radiation Field ◽  
Modular Design ◽  
Phase Distribution ◽  
Near Field ◽  
Antenna System ◽  
Directional Diagram ◽  
Spherical Coordinate ◽  
Software Complex ◽  
Wide Range ◽  
Antenna Systems

Measuring the amplitude-phase distribution of the radiation field of complex antenna systems on a certain surface close to the radiating aperture allows solving the problem of reconstructing the free-space diagram in the far field and also helps in determining the influence of various structural elements and defects of radiating surfaces on formation of directional diagram. The purpose of this work was to develop a universal hardware-software complex of a modular design aimed for determining the characteristics of wide range of antenna systems in respect of measurements of the amplitude-phase distribution of the radiation field in the near zone.The equations that connect the structure of radiation fields of the antenna system at various distances from it in planar, cylindrical and spherical coordinate systems as well as structural diagrams of the hardware part of measuring complexes have been analyzed.As a result, the concept of constructing a universal hardware-software complex for measuring the radiation field of various types of antenna systems with any type of measurement surface for solving a wide range of applied problems has been developed. A modular structure of hardware and software has been proposed; it allows reconfiguring the complex rapidly in order to measure the characteristics of any particular antenna system at all stages of product development and testing, and also makes the complex economically accessible even for small enterprises and organizations.

scholarly journals PRACTICAL IMPLEMENTATION OF HARDWARE AND SOFTWARE COMPLEX FOR PLANAR MEASUREMENTS OF ANTENNA CHARACTERISTICS IN THE NEAR ZONE

2017 ◽  
Vol 8 (4) ◽  
pp. 334-343
Author(s):  
A. G. Buday ◽  
A. P. Grinchuk ◽  
A. V. Gromyko
Keyword(s):  
Modular Design ◽  
Dynamic Range ◽  
Antenna System ◽  
Practical Implementation ◽  
Experimental Sample ◽  
Software Complex ◽  
Measuring Complex ◽  
Wide Range ◽  
Near Zone ◽  
Antenna Systems

Directional patterns measurement of antennas is carried out by the methods of far and near zone. Measurements in the far zone are straightforward; however they have a number of disadvantages. Near zone measurement methods are free from measurement shortcomings in the far zone, but it requires complex and expensive equipment for its implementation.Earlier, the authors have developed a concept of hardware and software modular design complex to determine antenna system characteristics as per measurements in the near zone. This concept assumes creation of a universal measuring complex to investigate various types of antenna systems with any type of measurement surface (plane, cylinder, sphere) in order to solve a wide range of applied problems. The purpose of this work lies in practical implementation of a variant of this measuring complex for measurement along the plane and determination of its metrological (hardware and software) capabilities.A working experimental sample of hardware and software complex for measuring the characteristics of antenna systems that realizes a radio-holographic method for measuring along a plane has been developed, created and practically tested. A preliminary estimation of errors in amplitude and phase measurements in the dynamic range of 45 dB and a comparison of the characteristics of several types of antennas measured in far and near zones have been made. Algorithms have been developed, a software for processing, storing and graphical display of measurement results has been created.

Analysis of the Reasons of Driving Wandering and Research of Solution Methods

2014 ◽  
Vol 602-605 ◽  
pp. 795-798 ◽  
Author(s):  
Xuan Jiong Xu ◽  
Xue Xun Guo
Keyword(s):  
Evaluation Methods ◽  
Feature Analysis ◽  
Dynamic Feature ◽  
Vehicle Dynamic ◽  
Test And Evaluation ◽  
Solution Methods

Through research of vehicle dynamic feature, analysis and research of the problem of driving wandering by user retroactions, the article put forward some test and evaluation methods of driving wandering. And the article is discussed about main reasons and solutions of driving wandering in-depth.

scholarly journals In Situ Vapor Polymerization of Poly(3,4-ethylenedioxythiophene) Coated SnO2-Fe2O3 Continuous Electrospun Nanotubes for Rapid Detection of Iodide Ions

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2084 ◽  
Author(s):  
Xiuru Xu ◽  
Wei Wang ◽  
Bolun Sun ◽  
Xue Zhang ◽  
Rui Zhao ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Fast Response ◽  
Core Shell ◽  
Current Response ◽  
Electrospinning Technique ◽  
Iodide Ions ◽  
Wide Range ◽  
Vapor Phase Polymerization ◽  
Fe2o3 Nanotubes

In this work poly(3,4-ethylenedioxythiophene) (PEDOT) coated SnO2-Fe2O3 continuous nanotubes with a uniform core–shell structure have been demonstrated for rapid sensitive detection of iodide ions. The SnO2-Fe2O3 nanotubes were firstly fabricated via an electrospinning technique and following calcination process. An in situ polymerization approach was then performed to coat a uniform PEDOT shell on the surface of as-prepared SnO2-Fe2O3 nanotubes by vapor phase polymerization, using Fe2O3 on the surface of nanotubes as an oxidant in an acidic condition. The resultant PEDOT@SnO2-Fe2O3 core-shell nanotubes exhibit a fast response time (~4 s) toward iodide ion detection and a linear current response ranging from 10 to 100 μM, with a detection limit of 1.5 μM and sensitivity of 70 μA/mM/cm2. The facile fabrication process and high sensing performance of this study can promote a wide range of potential applications in human health monitoring and biosensing systems.

Fade Statistic Analysis of SC in Distributed Antenna System

2013 ◽  
Vol 336-338 ◽  
pp. 1708-1712
Author(s):  
Lei Li ◽  
Xiao Dong Wang
Keyword(s):  
Antenna System ◽  
Multiple Antenna ◽  
Level Crossing ◽  
Distributed Antenna System ◽  
Level Crossing Rate ◽  
Composite Fading ◽  
Distributed Antenna ◽  
Diversity Gains ◽  
Antenna Systems ◽  
Average Fade Duration

Exact and closed form expressions for the average level crossing rate (LCR) and average fade duration (AFD) of the output signal envelope of selection diversity system are derived, assuming each branch is subject to independent but nonidentical composite fading in distributed antenna systems (DAS). Numerical results validate the derived expressions. It shows that DAS promise significant diversity gains over collocated multiple antenna system.

MIMO vector channel sounder measurement for smart antenna system evaluation

2001 ◽  
Vol 12 (5) ◽  
pp. 427-438 ◽  
Author(s):  
R. S. Thomä ◽  
D. Hampicke ◽  
A. Richter ◽  
G. Sommerkorn ◽  
U. Trautwein
Keyword(s):  
Smart Antenna ◽  
Antenna System ◽  
System Evaluation ◽  
Channel Sounder ◽  
Vector Channel ◽  
Smart Antenna System

Virtual Tissue Cutting With Haptic Feedback Using a Hybrid Actuator With DC Servomotor and Magnetorheological Brake

2016 ◽  
Vol 16 (3) ◽  
Author(s):  
Berk Gonenc ◽  
Hakan Gurocak
Keyword(s):  
Haptic Feedback ◽  
Fast Response ◽  
Virtual Training ◽  
Tissue Properties ◽  
Tissue Cutting ◽  
Wide Range ◽  
Force Profile ◽  
Rat Tissue ◽  
Dc Servomotor ◽  
Hybrid Actuator

Surgical training is an important and recent application where haptic interfaces are used to enhance the realism of virtual training simulators. Tissue cutting with surgical scissors is a common interaction mode in the simulations. The haptic interface needs to render a wide range of tissue properties and resistance forces accurately. In this research, we developed a hybrid haptic device made of a DC servomotor and a magnetorheological (MR) brake. The motor can provide fast dynamic response and compensate for inertia and friction effects of the device. But alone, it cannot supply high force levels and the sensation of stiff interaction with hard tissues such as tendons. On the other hand, the MR-brake can provide very stiff interaction forces yet cannot reflect fast dynamics that are encountered as the virtual scissors go through the tissue. The hybrid actuator developed in this work combines the two based on a control scheme that decomposes the actuator command signal into two branches considering each actuator's capabilities. It is implemented on a compact single degree-of-freedom (DOF) interface to simulate virtual tissue cutting with three different scissor types (Mayo, Metzenbaum, Iris) and four types of rat tissue (liver, muscle, skin, tendon). Results have shown close tracking of the desired force profile in all cases. Compared to just using a DC motor, the hybrid actuator provided a wider range of forces (up to 18 N) with fast response to render quick force variations without any instability for all simulated tissue and scissor types.

The Research of GPRS-Based Remote Fault Monitoring System for CNC Machine Tools

2011 ◽  
Vol 328-330 ◽  
pp. 393-397
Author(s):  
Ming Liang Wu ◽  
Xiao Bing Wang ◽  
Shu Rong Yu
Keyword(s):  
Monitoring System ◽  
Communication Networks ◽  
Remote Monitoring ◽  
Data Transfer ◽  
High Reliability ◽  
Fast Response ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Remote Monitoring System ◽  
Wide Range

Based on GPRS network remote monitoring system which uses its two-way transmission performance, can easily monitor various electrical equipments and get information. Compare with the past remote monitoring systems, the system has the advantage of flexible networking, convenient, wide range of data transmission, high reliability, fast response time, and has great significance and value of research in CNC machine tool system with upgrade GPRS in the mobile communication networks, data services expand and data transfer capabilities.

scholarly journals Environmental Sensitivity of Large Stealth Longwave Antenna Systems

2021 ◽  
Vol 13 (19) ◽  
pp. 3946
Author(s):  
Tomasz Aleksander Miś ◽  
Józef Modelski
Keyword(s):  
Environmental Monitoring ◽  
Water Content ◽  
Magnetic Loop ◽  
Antenna System ◽  
Loop Antenna ◽  
Soil Composition ◽  
Environmental Sensitivity ◽  
Good Compliance ◽  
Basic Functions ◽  
Antenna Systems

This article presents an analysis of measurements collected during a six-month-long experimental deployment of a surface-placed horizontal magnetic loop antenna. The changes in the measured parameters of the loop are investigated in relation to the surrounding environment’s composition, temperature and water content. Basic functions describing these changes are formulated. The results are confronted with outcomes from similar experiments from previous years and different locations, showing good compliance. The developed functions and antenna system can be used for environmental monitoring of soil composition and humidity over large areas and volumes, helpful in, for example, flood awareness.

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