Quality of tunable transmission line resonators with capacitor

The use of video surveillance systems is used in the areas of security, law and order, in the territories of protected objects, in monitoring the movement of road vehicles and in other areas. The main disadvantage of a video surveillance system is its susceptibility to weather influences (rain, fog, snowfall, etc.), which degrades the quality of the video system by reducing the signal level. Therefore, the urgency of finding new ways and possibilities to improve the quality of video signals is one of the priority areas of signal processing. The main task of this work was to determine the main parameters, simulate the transmission line and amplifier, and select the schematic diagram of the transmitting and receiving path with the voltage and current ratings. Both the receiver and the cable video transmitter have different means of adjusting to different transmission line lengths. The signal at the output of each receiver should be in the range from 0.9 to 1.1 V, and the spread of the total ohmic resistance of the wires of the video transmission line at the input of the receiver should be no more than 2 – 3%. Based on these parameters, the equipment is configured for transmitting video over the channel. The magnitude of the mismatch is regulated by potentiometers, which allow smooth adjustment of the video transmission equipment [1]. As a rule, video transmission over the channel is carried out at a distance of 50 to 1500 m. If it is necessary to transmit video at distances less than 50 m, additional resistances are connected in series at the receiver input so that the total line resistance is 30 - 50 Ohm [1].

Download Full-text

Quality Control of Transmission Line Engi-neering in Wind Power Plant

World Construction ◽

10.18686/wc.v6i2.104 ◽

2017 ◽

Vol 6 (2) ◽

Author(s):

Peng Wang

Keyword(s):

Quality Control ◽

Power Plant ◽

Transmission Line ◽

Wind Power ◽

Quality Assurance System ◽

Wind Power Plant ◽

Whole Process ◽

Power Stations ◽

Assurance System

The most critical component of a wind power plant is the transmission line, which carries two key tasks – the transpor-tation and distribution of electricity. The transmission line is also responsible for the various substations, wind power stations to contact to its safe and smooth operation. As the competition order of wind power projects is more chaotic, the quality of the project cannot be supervised and controlled by the whole process. The quality control of the project is not up to standard, and the overall quality of the transmission line will be affected. This paper focuses on two aspects of the elaboration, one is the wind turbine transmission line project common quality problems; the other is how to build wind power plant transmission line quality assurance system.

Download Full-text

Microwave Characterization of Metal-Decorated Carbon Nanopowders Using a Single Transmission Line

Journal of Nanomaterials ◽

10.1155/2019/3280461 ◽

2019 ◽

Vol 2019 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Francisco Mederos-Henry ◽

Sophie Hermans ◽

Isabelle Huynen

Keyword(s):

Magnetic Field ◽

Dielectric Constant ◽

Transmission Line ◽

Dc Magnetic Field ◽

Microwave Characterization ◽

Novel Approach ◽

Measurement Results ◽

Complex Magnetic Permeability

This paper presents a novel approach for the characterization of microwave properties of carbon-based nanopowders, decorated or not with magnetic nanoparticles. Their microwave parameters, dielectric constant, electrical conductivity, and complex magnetic permeability are extracted from measurements performed using a single transmission line acting as a test cell. Two geometries of transmission line were tested, and successful results were obtained with each one of them. The measurement results are assessed by a phenomenological model enabling to fit the measurement of the dielectric constant and conductivity, providing an insight on the compacity quality of the powder sample. Also, the extraction of the permeability is validated by the detection of a ferromagnetic resonance showing a linear dependence on external DC magnetic field.

Download Full-text

FCAW vertical welding of “V” butt plate in AC UHV transmission line construction

MATEC Web of Conferences ◽

10.1051/matecconf/201817503001 ◽

2018 ◽

Vol 175 ◽

pp. 03001

Author(s):

Han Yang ◽

Chen Kerui ◽

Li Yang ◽

Qu Bao

Keyword(s):

Transmission Line ◽

Large Scale ◽

Optimal Allocation ◽

Welding Process ◽

Steel Structure ◽

Solid Core ◽

Flux Cored Arc Welding ◽

Welded Structure ◽

Wide Range

In twenty-first Century, China vigorously promoted the research and construction of AC and DC transmission technology in order to ensure the optimal allocation of energy resources in a large scale[1]. In the construction of AC UHV transmission line, the welding quality of tower and stiffening plate as the load bearing tower and the tension of the welded structure plays an important role in the overall quality of the steel structure. In the past, the welding process of semi automatic carbon dioxide solid core welding wire often has the characteristics of weld spatter not easy to clean up and low efficiency of welding. The semi-automatic CO2 flux cored arc welding, has the characteristics of current and voltage to adapt to a wide range, melting speed, has important significance for improving the process, this paper describes the technology in practical engineering applications, and developed the basic strategy of training for grid steel structure welding technicians. This paper also lists both V groove plate butt FCAW welding typical welding project, hope this welding process will continue to spread.

Download Full-text

InsulatorGAN: A Transmission Line Insulator Detection Model Using Multi-Granularity Conditional Generative Adversarial Nets for UAV Inspection

Remote Sensing ◽

10.3390/rs13193971 ◽

2021 ◽

Vol 13 (19) ◽

pp. 3971

Author(s):

Wenxiang Chen ◽

Yingna Li ◽

Zhengang Zhao

Keyword(s):

Transmission Line ◽

Transmission Lines ◽

State Of The Art ◽

Generative Adversarial Network ◽

Detection Model ◽

Adversarial Network ◽

Monte Carlo Search ◽

Model Training ◽

Inspection Tasks

Insulator detection is one of the most significant issues in high-voltage transmission line inspection using unmanned aerial vehicles (UAVs) and has attracted attention from researchers all over the world. The state-of-the-art models in object detection perform well in insulator detection, but the precision is limited by the scale of the dataset and parameters. Recently, the Generative Adversarial Network (GAN) was found to offer excellent image generation. Therefore, we propose a novel model called InsulatorGAN based on using conditional GANs to detect insulators in transmission lines. However, due to the fixed categories in datasets such as ImageNet and Pascal VOC, the generated insulator images are of a low resolution and are not sufficiently realistic. To solve these problems, we established an insulator dataset called InsuGenSet for model training. InsulatorGAN can generate high-resolution, realistic-looking insulator-detection images that can be used for data expansion. Moreover, InsulatorGAN can be easily adapted to other power equipment inspection tasks and scenarios using one generator and multiple discriminators. To give the generated images richer details, we also introduced a penalty mechanism based on a Monte Carlo search in InsulatorGAN. In addition, we proposed a multi-scale discriminator structure based on a multi-task learning mechanism to improve the quality of the generated images. Finally, experiments on the InsuGenSet and CPLID datasets demonstrated that our model outperforms existing state-of-the-art models by advancing both the resolution and quality of the generated images as well as the position of the detection box in the images.

Download Full-text

ABOUT OPTIMAL CLONING AND ENTANGLEMENT

International Journal of Quantum Information ◽

10.1142/s021974991100740x ◽

2011 ◽

Vol 09 (03) ◽

pp. 915-936 ◽

Cited By ~ 3

Author(s):

THOMAS DURT ◽

JOHAN VAN DE PUTTE

Keyword(s):

Numerical Methods ◽

Transmission Line ◽

Quantum Key Distribution ◽

Key Distribution ◽

Trade Off ◽

Classical Feature

The main non-classical feature of quantum key distribution (QKD) is that it is characterized by a trade-off relation that limits the information possibly gained by a spy and the quality of the transmission line between the authorized users. In particular, perfect cloning is impossible, due to this trade-off, while optimal imperfect cloning saturates the trade-off relation. We investigate by numerical methods the deep nature of this trade-off relation, in the case of optimal cloning, and find that it reveals a subtle interplay between fidelity and entanglement.

Download Full-text

The effects of multipactor on the quality of a complex signal propagating in a transmission line

Physics of Plasmas ◽

10.1063/1.5125408 ◽

2019 ◽

Vol 26 (11) ◽

pp. 112114 ◽

Cited By ~ 4

Author(s):

Patrick Y. Wong ◽

Y. Y. Lau ◽

Peng Zhang ◽

Nicholas Jordan ◽

Ronald M. Gilgenbach ◽

...

Keyword(s):

Transmission Line ◽

Complex Signal

Download Full-text

Research on the control system of an amphibious transmission line Inspection UAV based on fuzzy PID control

E3S Web of Conferences ◽

10.1051/e3sconf/20186405001 ◽

2018 ◽

Vol 64 ◽

pp. 05001

Author(s):

Shengbiao Lu ◽

Liangbiao Xia ◽

ying Shi ◽

Xiping Han ◽

Tong Pang ◽

...

Keyword(s):

Transmission Line ◽

Flight Control ◽

Pid Control ◽

Process Design ◽

Control Algorithm ◽

Control Process ◽

Fuzzy Pid ◽

Fuzzy Pid Control ◽

Inspection Robot

The amphibious UAV combines the advantages of multi rotor UAV and line inspection robot. It can carry out two working modes: air flight and online driving. It can observe the running state of transmission line and improve the quality of patrol. In this paper, a fuzzy PID control algorithm is proposed to make the amphibious UAV flight control more flexible and close to the transmission line, and the simulation and software control process design are carried out.

Download Full-text

An enhancement of instruments for solution of general transmission line equations with method of lines, impedance-/admittance and field transformation in combination with finite differences

10.21203/rs.3.rs-901151/v1 ◽

2021 ◽

Author(s):

Waldemar Spiller

Keyword(s):

Transmission Line ◽

Finite Differences ◽

Method Of Lines ◽

Optimal Choice ◽

Complex Structures ◽

Implicit Methods ◽

Building Site ◽

Field Transformation ◽

Generalized Transmission Line Equations

Abstract The Method of Lines (MoL) in combination with impedance-/admittance and field transformation (IAFT) is used to analyze electromagnetic waves. The used cases are wave-guiding structures in microwave technology and optics. The core of the theory is the solution of generalized transmission line equations (GTL). In the case of complex structures, a combination with finite differences (FD) can be used. The quality of this solution essentially depends on the effectiveness of the used interpolation of the differences. The individual steps of the FD are permanently linked to the steps of the fully vectorial impedance-/admittance and/or field transformation, so standard libraries cannot be used. Two approaches based on the linear and quadratic interpolation were built into the impedance-/admittance and field transformation in the past. However, the degree of improvement due to one or another kind of interpolation depends on the concrete behavior of the solution sought. In the case of complex structures, choosing the appropriate type of interpolation should be an effective aid. In this paper, an extension of the family of built-in methods is proposed - with the possibility of being able to build any known numerical method from the class of one-step or multi-step methods into the GTL solution. These can be higher-order methods, including fast explicit methods, or particularly stable implicit methods. The transmission matrices for the impedance-/admittance and field transformation serve as the building site. To illustrate the procedure, some different methods are integrated into the GTL solution. The accuracy of the solutions is tested on selected complex structures and compared with each other and with existing solutions. It is shown that the optimal choice of method and the quality of the solution can depend on concrete structures. Keywords: Method of lines, generalized transmission line equations, impedance/admittance transformation, waveguide structures, finite differences, finite differences with second order accuracy.

Download Full-text