scholarly journals On-Line Monitoring of Blind Fastener Installation Process

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1157
Author(s):  
Javier Camacho ◽  
Fernando Veiga ◽  
Mari Luz Penalva ◽  
Alberto Diez-Olivan ◽  
Lutz Deitert ◽  
...  
Keyword(s):  
Monitoring System ◽  
Special Interest ◽  
Online Monitoring ◽  
New Method ◽  
Back Side ◽  
Monitoring Method ◽  
Use Of Resources ◽  
On Line ◽  
Sensor Signals ◽  
Evaluation Outcome

Blind fasteners are of special interest for aircraft construction since they allow working on joints where only one side is accessible, as is the case in many common aerospace box-type structures, such as stabilizers and flaps. This paper aims to deliver an online monitoring method for the detection of incorrect installed blind fasteners. In this type of fastener, the back side of the assembly is not accessible, so monitoring the process installation is suitable as a system to assess the formed head at the back side with no access. The solution proposed consists of an on-line monitoring system that is based on sensor signals acquired during the installation. The signals are conveniently analyzed in order to provide an evaluation outcome on how the fastener was installed. This new method will help production to decrease/eliminate time and cost-intensive inspections and fasteners over installation in structures. The decrease of the number of installed fasteners will also contribute to weight savings and will reduce the use of resources.

Development of On-Line Monitoring System and Aging Characteristics Research of Switchgear

2013 ◽  
Vol 330 ◽  
pp. 364-367
Author(s):  
Shu Xin Liu ◽  
Yun Dong Cao ◽  
Chun Guang Hou ◽  
Yang Liu ◽  
Xiao Ming Liu
Keyword(s):  
Epoxy Resin ◽  
Monitoring System ◽  
Estimation Method ◽  
Current Transformer ◽  
Insulation Material ◽  
Electrical Characteristics ◽  
Infrared Transmission ◽  
Lifetime Estimation ◽  
Monitoring Method ◽  
On Line

For improving reliable operation of switchgear in power system, an approach for on-line monitoring the insulation characteristic and bus-bar temperature rising of the switchgear is proposed in this paper. Through comparing several existing temperature measurement methods for monitoring temperature rising elevation at bus-bas, a new design of temperature monitoring method is proposed. It adopts quick-magnetic saturated current transformer, temperature sensor and infrared transmission to solve the problem of high voltage isolation. The epoxy resin insulation material which is commonly used in switchgear its aging mechanism data is not complete, seriously restrict on-line monitoring for switchgear, so thousands hours of aging experiment is done on switchgear, systematic study various electrical characteristics variation law on the gradual aging process of epoxy resin insulation materials. Therefore, study on the aging characteristics of switchgearinsulation and its lifetime estimation method is the key technology to understand agingmechanism better, search for new fault diagnostic method and the way to extend theuseful lifetime of switchgear. At last, the system runs in real system and the result shows the on-line monitoring system is stable and reliable which can be provide reference for on-line monitoring system design of switchgear.

A method of estimating intracranial decompensation in man

1976 ◽  
Vol 45 (2) ◽  
pp. 155-158 ◽  
Author(s):  
Jerzy Szewczykowski ◽  
Pawel Dytko ◽  
Adam Kunicki ◽  
Jolanta Korsak-Sliwka ◽  
Stanislaw Sliwka ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Intracranial Pressure ◽  
Characteristic Feature ◽  
Computer System ◽  
Monitoring System ◽  
New Method ◽  
Icp Monitoring ◽  
Content Type ◽  
On Line ◽  
Fine Print

✓ A new method of estimating intracranial decompensation in man is described. An on-line computer system is connected to an intracranial pressure (ICP) monitoring system to compute regression plots of mean ICP vs standard deviation; standard deviation is used as a measure of ICP instability. Two zones with distinctly different slopes are a characteristic feature of these plots. It is thought that the changes of slope signify intracranial decompensation.

New Methodology of On-Line Monitoring for Transmission Line Galloping

2013 ◽  
Vol 805-806 ◽  
pp. 867-870 ◽  
Author(s):  
Yu Sheng Quan ◽  
Enze Zhou ◽  
Guang Chen ◽  
Xin Zhao
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Large Scale ◽  
Online Monitoring ◽  
Large Area ◽  
Monitoring Method ◽  
Overhead Transmission Line ◽  
Additional Equipment ◽  
On Line ◽  
Wire Cross Section

When the overhead transmission line is galloping, a variety of natural disasters occur on the role of the natural conditions, the vibration of conductor is one of the more serious harm to the power system. Over the past decade, as the construction of EHV and UHV, wire cross-section, tension, suspension height and span of overhead transmission lines are increasing, and hence the number of conductor vibration is significantly increased. Vibration in a large scale will led to frequent tripping or even broken line or tower collapses, which cause large area power failures and impact security and stability operation. Online monitoring method for overhead transmission line dancing is mostly needed to add additional equipment, however, once situated on the route environment overlying ice or high winds and other inclement weather, online monitoring is difficult to achieve. This paper presents a method, which is made correlation analysis based on the voltage and current acquired from both ends of the transmission lines, online monitoring of line galloping can be achieved.

Transformer Bushing Online Monitoring Method Based on the Method of Relative Angle Difference

2014 ◽  
Vol 668-669 ◽  
pp. 961-964
Author(s):  
Qiang Gao ◽  
Feng Yuan ◽  
Zhan Nan Guo ◽  
Qi Liu ◽  
Dan Tian Zhong ◽  
...  
Keyword(s):  
Power System ◽  
Power Supply ◽  
Online Monitoring ◽  
Relative Method ◽  
Safe Operation ◽  
Monitoring Method ◽  
Angle Difference ◽  
On Line ◽  
Security And Reliability ◽  
Data Acquiring

Transformer is the main equipment of power system, its operation reliability is directly related to power system security and reliability of power supply. In order to guarantee the safe operation of power system, must strengthen the monitoring of the main transformer.With the development and popularization of intelligent station, the detection of transformers insulation is faced with the new problem that PT signal is not convenient to get and even unable to get. This paper proposes the relative method which is used to calculate and monitor dielectric loss of transformer bushing and designs the on-line monitoring device, through the data acquiring form the on-line monitoring instrument which are installed in the transformer of substation shows that this method has high precision, strong anti-interference ability.

scholarly journals Construction of Online Monitoring System for Track Safety and its Vibration and Noise

New Metro ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 28-33
Author(s):  
Snan Taotao ◽  
Dong Guoxian
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Online Monitoring ◽  
Health And Safety ◽  
Rail Transit ◽  
Time Data ◽  
Monitoring Equipment ◽  
Status Monitoring ◽  
On Line ◽  
Online Monitoring System

In accordance with the requirements of intelligent and scientific maintenance and repair for rail transit, the on-line monitoring and intelligent assessment technologies for infrastructure safety as well as vibration and noise indexes are studied. In connection with the line status of the Shanghai rail transit network, typical line sections are selected to lay out the online status monitoring equipment so as to track health and safety indexes of rails and real-time noise and vibration levels. By means of online real-time data collection and synchronous analysis technology, the Shanghai rail transit online monitoring system for track safety status and its vibration and noise takes shape, thereby achieving real-time monitoring for on-site vibration and noise as well as safety status, and providing assistant decision-making reports in connection with relevant index systems and in accordance with relevant time periods.

scholarly journals Study on internet of things architecture of substation online monitoring equipment

2021 ◽  
Vol 336 ◽  
pp. 05024
Author(s):  
Hejun Zhang ◽  
Dong Ge ◽  
Ning Yang ◽  
Pengfei Jia ◽  
Lihua Li ◽  
...  
Keyword(s):  
Internet Of Things ◽  
Monitoring System ◽  
Online Monitoring ◽  
The Internet ◽  
Monitoring Equipment ◽  
Accurate Evaluation ◽  
Accurate Perception ◽  
On Line ◽  
Substation Equipment ◽  
The Internet Of Things

This paper introduces the structure of the existing on-line monitoring system, and analyzes the problems of poor compatibility and reliability of IED in different manufacturers. Then it gives two ways to transform the on-line monitoring system of substation equipment to the Internet of things, which is to retain IED and to remove IED. On this basis, this paper introduces the application scenarios of the on-line monitoring system of substation equipment connected to the Internet of things, including accurate perception of equipment status, accurate evaluation of equipment status and intelligent research and judgment of equipment status.

Development of a Precision Micro-Assembly Machine for ICF Targets

2012 ◽  
Vol 605-607 ◽  
pp. 1431-1435
Author(s):  
Wen Rong Wu ◽  
Da Hai Yu ◽  
Lin Zhang ◽  
Zu Rong Qiu ◽  
Xin Han Huang
Keyword(s):  
Monitoring System ◽  
Measurement System ◽  
Online Monitoring ◽  
Mathematic Model ◽  
Research Community ◽  
Microscopic Image ◽  
Assembly Process ◽  
Micro Assembly ◽  
On Line ◽  
Online Monitoring System

The Precision Micro-Assembly Machine was developed to manufacture the ICF targets, which have submillimeter-sized components with micrometer sized features. The machine provides simultaneous manipulation of three objects in a 3-cm3 operating arena and can stitch together multiple millimeter-scales operating arenas over distances spanning tens of centimeters with micrometer-level accuracy. In this report, we will discuss the technologies that are merged to help assist the research community with micro-component fabrication. Furthermore, we also present the design of the online monitoring system, which contains two kinds of non-contact measurement system, microscopic image and laser confocal. The online monitoring system can characterize the positions of the target components during the assembly process. The effect and mathematic model of on-line measuring was analyzed. The results of target assembly experiments show position tolerance of the assembly is not more than 10μm.

scholarly journals Research on On-line Monitoring Technology of Secondary Equipment in Smart Substation

2021 ◽  
Vol 256 ◽  
pp. 01021
Author(s):  
Hongming Shen ◽  
Peili Yan ◽  
Teng Feng ◽  
Ziqi Wang ◽  
WenXuan Liu ◽  
...  
Keyword(s):  
Monitoring System ◽  
Online Monitoring ◽  
Design Principles ◽  
Technical Support ◽  
Monitoring Technology ◽  
Management Level ◽  
Overall Design ◽  
On Line ◽  
Online Monitoring System ◽  
Smart Substation

First, the overall design principles of the online monitoring of secondary equipment in smart substations are studied. Then, the overall architecture of online monitoring of secondary equipment is proposed. Finally, the advanced application of the online monitoring system of secondary equipment is analyzed. The method proposed in this paper improves the online monitoring and management level of secondary equipment, and provides technical support for the regulation and condition maintenance of secondary equipment.

scholarly journals Study on overhead transmission line on-line monitoring technology

2016 ◽  
Vol 20 (suppl. 2) ◽  
pp. 383-391 ◽  
Author(s):  
Zhiwang Yang ◽  
Nikola Zivlak ◽  
Ming Xu ◽  
Marko Ljubicic
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Transmission Line ◽  
Monitoring System ◽  
Online Monitoring ◽  
Safe Operation ◽  
Operation System ◽  
Overhead Transmission Line ◽  
On Line ◽  
Artificial Neural Network Ann

paper introduces a new idea for overhead transmission line online monitoring. The basis of the paper has been developed upon years of research conducted by power engineers, and a new advanced transmission line safe operation monitoring system is proposed successfully. Furthermore, we used artificial neural network(ANN) for diagnosis examples, to prove the feasibility and effectiveness of the advanced transmission line safe operation system.

scholarly journals Online Monitoring Method for Mold Deformation Using Mahalanobis Distance

2021 ◽  
Vol 15 (5) ◽  
pp. 689-695
Author(s):  
Yoshio Fukushima ◽  
◽  
Naoki Kawada
Keyword(s):  
Injection Molding ◽  
Monitoring System ◽  
Mahalanobis Distance ◽  
Online Monitoring ◽  
Monitoring Method ◽  
Iot Applications ◽  
Fundamental Investigation ◽  
Strain Data ◽  
Mold Deformation ◽  
Plastic Injection

Based on the rapid advancement of IoT technology, it has become pervasive in various industries for promoting effective production, including the plastic injection molding industry. In this study, a fundamental investigation of mold deformation was conducted to develop a monitoring system. Mahalanobis distance (MD), which is calculated from mold strain data, was adopted in this monitoring system. We determined that the simple MD index is helpful for judging between normal and abnormal mold states. This index is expected to be a key component of future IoT applications.

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