A Lamb waves based ultrasonic system for the simultaneous data communication, defect inspection, and power transmission

2021 ◽  
pp. 1-1
Author(s):  
Yongshun Sun ◽  
Yunfei Xu ◽  
Wei Li ◽  
Quanchang Li ◽  
Xiaoxi Ding ◽  
...  
Keyword(s):  
Power Transmission ◽  
Lamb Waves ◽  
Data Communication ◽  
Defect Inspection

Implementation and Application of QoS in Power Ethernet Switch

2014 ◽  
Vol 1044-1045 ◽  
pp. 338-343
Author(s):  
Shan Qiang Feng ◽  
Chun Chao Hu ◽  
Kai Ma ◽  
Xiao Yue Zhang ◽  
Wen Qing Lan ◽  
...  
Keyword(s):  
Quality Of Service ◽  
Power Transmission ◽  
Flow Characteristics ◽  
Data Communication ◽  
Network Nodes ◽  
Development Direction ◽  
Digital Substation ◽  
Network Transmission ◽  
Ethernet Switch

Smart grid based on Ethernet technology is the development direction of power transmission network, power Ethernet carried different data communication service, which have different needs for network transmission time delay and bandwidth guarantee, which is reflected in the quality of service of network QoS (Quality of Service) requirements, in power Ethernet, QoS which can provided differentiated services (Diff-Serv) is essential. This paper outlines QoS implementation, QoS feature and related technologies in the power Ethernet switch, and analyses the flow characteristics of digital substation network, and proposes classification and scheduling scheme of service traffic based on network nodes, and elaborates an important effect that QoS has in ensuring substation communication network transmission of high quality service.

Communication Net and MIMO Precoding Study on Wind Power Monitoring System

2014 ◽  
Vol 543-547 ◽  
pp. 938-941
Author(s):  
Xin Li Cao ◽  
Yun Dong Wen
Keyword(s):  
Wind Power ◽  
Monitoring System ◽  
Power Transmission ◽  
Data Communication ◽  
Theoretical Method ◽  
Base Station ◽  
Channel State ◽  
Power Monitoring ◽  
Mimo Antennas ◽  
Partial Channel

Paper studies the design of MIMO antennas and channel precoding on data communication net of wind power monitoring system. Paper first analyses communication network model of monitoring system. Then configures MIMO in the base station. Paper explains MMSE-QR linear precoding, then give the algorithm of QR-MMSE-SIC in the case of known ideal or partial channel state information at transmitter. Finally, BER of several precoding models with and without precoding are analyzed. It gives a theoretical method of communication net configuring and precoding on wind power transmission net.

scholarly journals Articulating Factors Defining RMS Delay Spread in LV PLC Networks

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Sabih Güzelgöz ◽  
Hasan Basri Çelebi ◽  
Hüseyin Arslan
Keyword(s):  
Communication Systems ◽  
Power Transmission ◽  
Low Voltage ◽  
Data Communication ◽  
Power Line ◽  
Delay Spread ◽  
Rms Delay Spread ◽  
Vehicle Data ◽  
Wideband Communications ◽  
Recent Developments

Communication over the power line network (PLN) referred as power line communication (PLC) has a long history of narrowband applications. With the recent developments in the field of digital communications, current interest is to exploit this medium for wideband communications for several applications such as Internet access, home networking, and in-vehicle data communication. In line with this recently emerging interest which envisions the conversion of a power transmission network into a communication network, understanding the root-mean-squared (RMS) delay spread is essential for multipath PLC channels for the establishment of reliable communication systems. In this paper, factors that play a role on the RMS delay spread value of low voltage (LV) PLC channels are articulated. Among these factors, dependency of the RMS delay spread on attenuation, loading, and physical characteristics of the communication channel in the PLNs is investigated.

scholarly journals Modeling and Evaluation of Piezoelectric Transducer (PZT)-Based Through-Metal Energy and Data Transfer

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3304
Author(s):  
Lianghui Ding ◽  
Kehong Chen ◽  
Falong Huang ◽  
Feng Yang ◽  
Liang Qian
Keyword(s):  
Piezoelectric Transducer ◽  
Acoustic Pressure ◽  
Power Transmission ◽  
Data Transfer ◽  
Low Cost ◽  
Data Communication ◽  
Metal Transfer ◽  
Transfer Efficiency ◽  
Relative Pressure ◽  
Alloy Plate

Through-metal transfer of energy and data using piezoelectric transduce can avoid the potential leakage problem caused by physical penetrations and wired feed-through. The through-metal transfer efficiency of energy or data is determined by the relative pressure on the receiving PZT (piezoelectric transducer). Hence, in this paper, we first propose the Spatial Equivalent Plane Acoustic Pressure (SEPAP), which is defined as the integration of the acoustic pressure over the receiving area, to model the pressure on the receiving PZT. Then we analyze the features of SEPAP and the factors impacting it by utilizing COMSOL. Furthermore, we propose a low-cost and small-size prototype for simultaneous transfer of energy and bidirectional communication through metal by using two pairs of PZTs working on different resonant frequencies. Extensive experiment has been done on evaluating the match between SEPAP transfer efficiency and the power transfer efficiency and analyzing the achievable data rate for bi-directional communication. Test through a 20 mm aluminum alloy plate shows that power transmission with efficiency 20.3% and data communication rate up to 38.4 Kbps can be achieved simultaneously.

Lamb wave band structure in phononic crystal composed of multiple square stubs symmetric or anti-symmetric deposited on a homogeneous plate

2015 ◽  
Vol 29 (16) ◽  
pp. 1550106 ◽  
Author(s):  
X. P. Wang ◽  
P. Jiang ◽  
T. N. Chen ◽  
K. Bao
Keyword(s):  
Band Structure ◽  
Power Transmission ◽  
Lamb Waves ◽  
Phononic Crystal ◽  
Symmetric Model ◽  
Wave Band ◽  
Displacement Fields ◽  
Practical Applications ◽  
Homogeneous Plate ◽  
Symmetric Structure

This paper theoretically investigates the propagation of Lamb waves in a two-dimensional (2D) phononic crystal (PC) structure composed of multiple square stubs symmetric or anti-symmetric deposited on a thin homogeneous plate. The dispersion relations, the power transmission spectra and the displacement fields of the eigenmodes are studied by using the finite-element method (FEM). We investigate the effect of the distance between adjacent square stubs on the band gaps (BGs). The results show that the distance between adjacent square stubs can remarkably change the location and the width of the BGs. Meanwhile, we conducted a numerically study on the different results between the anti-symmetric and symmetric distribution of the scatterers. The band structure of the anti-symmetric structure PC is significantly different from the symmetric structure. In general, the distribution of the square stubs has an influence on the band structures. We further identify the physical mechanism of the distinction in the formation of the BG between the anti-symmetric and the symmetric model through the displacement fields of the eigenmodes. In addition, we find that the variation of the PC BGs in anti-symmetric and symmetric structure are sensitive to the distance between adjacent square stubs, which could be indispensable to practical applications such as BG tuning.

Sign in / Sign up

Export Citation Format

Share Document