scholarly journals Flexible Sensor Array Based on Transient Earth Voltage for Online Partial Discharge Monitoring of Cable Termination

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6646
Author(s):  
Mingshu Zhao ◽  
Xiaoyan Cao ◽  
Kai Zhou ◽  
Yao Fu ◽  
Xutao Li ◽  
...  
Keyword(s):  
Monitoring System ◽  
Sensor Array ◽  
Partial Discharge ◽  
Propagation Model ◽  
Monitoring Device ◽  
Sensing Element ◽  
Flexible Sensor ◽  
Response Characteristics ◽  
Flexible Polymer ◽  
Communication Module

Cable termination is a weak point in an underground cable system. The transient earth voltage (TEV) method is an effective and nonintrusive method for estimating the insulation condition of cable termination. However, the practical application of TEV detection is mainly focused on switchgears, generators, and transformers with a flat and conductive shell. A flexible sensor array based on the TEV method is presented for online partial discharge (OLPD) monitoring of the cable termination. Each sensing element is designed with a dual-capacitor structure made of flexible polymer material to obtain better and more stable sensitivity. Based on the electromagnetic (EM) wave propagation theory, the partial discharge (PD) propagation model in the cable termination is built to analyze and verify the rationality and validity of the sensor unit. Some influencing factors are discussed regarding the response characteristics of sensors. Finally, the performance of the sensor array is verified by simulations and experiments. Besides, an OLPD monitoring system is introduced. The monitoring system is composed of the on-site monitoring device and the remote monitoring host. The two parts of the system exchange the data through wireless networks using a wireless communication module. The experiment results show that the monitoring device could supply the PD condition monitoring demand for cable termination.

scholarly journals Sensitivity Calibration of UHF Partial Discharge Monitoring System in GIS

2002 ◽  
Vol 122 (11) ◽  
pp. 1226-1231
Author(s):  
Tatsuro Kato ◽  
Fumihiro Endo ◽  
Shingo Hironaka
Keyword(s):  
Monitoring System ◽  
Partial Discharge ◽  
Discharge Monitoring

scholarly journals Tire Pressure Monitoring System

2020 ◽  
pp. 469-473
Keyword(s):  
Monitoring System ◽  
Pressure Sensor ◽  
Electronic Device ◽  
Monitoring Device ◽  
Pressure Monitoring ◽  
Tire Pressure ◽  
Computer Screen ◽  
Tire Pressure Monitoring System ◽  
On Chip ◽  
Wireless Module

Tire pressure monitoring device/system (TPMS) is an electronic device that monitors the air strain of an vehicle tire and indicates the pressure to the driver.Upkeep of tire strain in automobile is vital owing to the reality depletion within the strain of tire ends up in diminished combustible potency and future scratch in tires which ends up in substitution of tires fairly again and again. In this paper the used conception relies upon eliminating above problems and observing those facts continuously using pressure sensor with the help of some devices and wireless modules such as zigbee or rf-transreciever and also STM32 on-chip computer. A different mouth is distended other than conventional muzzle within that device is found which communicate via wireless apparatus and obtained with the help of the wireless module such as zigbee gift out of doors and also the signal is been dispatched to on-chip computer which computer screen units and unveil the strain name (name of tire) and actual strain on a screen monitor which notify the person to fill the air in tire. With the use of this system the user of the vehicle can eliminate the wheel is alignment and supply protection to the vehicle.

Design of PC Remote Monitoring System for Standby Generators

2014 ◽  
Vol 1039 ◽  
pp. 197-202
Author(s):  
Chuan Hong Zhou ◽  
Jin Jie Xiao ◽  
Wei Ren
Keyword(s):  
Monitoring System ◽  
Remote Monitoring ◽  
Interface Design ◽  
Database Design ◽  
Sql Server ◽  
Monitoring Device ◽  
Remote Monitoring System ◽  
Remote Server ◽  
Sql Server Database ◽  
Low Efficiency

Currently,some problems exist in the process of using standby generators, such as low efficiency,high cost and late service of artificial overhaul and maintenance.In order to overcome these problems, PC remote monitoring system is designed.This paper mainly introduces the structure composition,function,interface design and SQL Server database design of the system.In addition, the function of communication between the PC remote server and signal monitoring device was tested and the effect was desired

scholarly journals Solution of the problem of impact elastoplastic deformation of a thin layer of mechanoluminophor using the methods of the dislocation microdynamic theory of plasticity

2019 ◽  
Vol 221 ◽  
pp. 01047
Author(s):  
Konstantin Tatmyshevskiy
Keyword(s):  
Thin Layer ◽  
Optical Radiation ◽  
Strong Electric Field ◽  
Radiation Energy ◽  
Direct Conversion ◽  
Sensing Element ◽  
Optical Signals ◽  
Flexible Polymer ◽  
Basic Equations ◽  
The Mathematical Model

The paper presents the results of numerical simulation of the output optical signals of mechanoluminescent shock sensors. Such sensors operate on the principle of direct conversion of mechanical impact energy into optical radiation energy. The sensing element of such a sensor is a thin layer of phosphor enclosed between two transparent flexible polymer films. The mathematical model of the sensor is based on the process of excitation of the glow centers (activator atoms) in a strong electric field of a moving dislocation. The stress-strain state of the film sensing element under quasi-static uniaxial loading under the action of a single pressure pulse is considered. The analysis of constitutive equations for elasto-plastic deformations and the basic equations of the dynamic theory of dislocations. To calculate the deformation of the sensing element, a microscopic model of an isotropic elastic-plastic medium with hardening is used, according to which the plastic deformation is considered as a result of the movement and multiplication of dislocations, and the hardening is as a result of their partial locking due to the increased density.

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