Research and Progress of Electromagnetic Coil Gun Ranging

2014 ◽  
Vol 1049-1050 ◽  
pp. 1176-1180
Author(s):  
Chao Qi ◽  
Ye Wang ◽  
Wei Jian Liu ◽  
Yong Quan
Keyword(s):  
Great Influence ◽  
Energy Conversion Efficiency ◽  
Optical Methods ◽  
Laser Scattering ◽  
Advantages And Disadvantages ◽  
Electromagnetic Coil ◽  
Position Detection ◽  
Multi Stage ◽  
Optimum Position ◽  
Scattering Measurement

The armature trigger position of multi-stage electromagnetic coil gun has great influence on the exit velocity of projectile. The energy conversion efficiency of the coil gun can be improved effectively if the armature is triggered in the optimum position. So it is important to detect the projectile position in time. Several typical electrical and optical methods for position detection are summarized in this paper. The advantages and disadvantages of each method are analyzed and evaluated. And a new laser scattering measurement method is proposed. Results show that optical detection method is simple and easy to implement, but it is susceptible to environmental impacts.

Partial Discharge Detection Using Acoustic and Optical Methods in High Voltage Power Equipments: A Review

2013 ◽  
Vol 845 ◽  
pp. 283-286 ◽  
Author(s):  
Malik Abdul Razzaq Al Saedi ◽  
Mohd Muhridza Yaacob
Keyword(s):  
Acoustic Emission ◽  
High Voltage ◽  
Power Transformer ◽  
Partial Discharge ◽  
Optical Detection ◽  
Detection Threshold ◽  
Optical Methods ◽  
Detection Methods ◽  
Detection Techniques ◽  
Advantages And Disadvantages

There is a high risk of insulation system dielectric instability when partial discharge (PD) occurs. Therefore, measurement and monitoring of PD is an important preventive tool to safeguard high-voltage equipment from wanton damage. PD can be detected using optical method to increase the detection threshold and to improve the performance of on-line measurement of PD in noise environment. The PD emitted energy as acoustic emission. We can use this emitted energy to detect PD signal. The best method to detect PD in power transformer is by using acoustic emission. Optical sensor has some advantages such as; high sensitivity, more accuracy small size. Furthermore, in on-site measurements and laboratory experiments, it isoptical methodthat gives very moderate signal attenuations. This paper reviews the available PD detection methods (involving high voltage equipment) such as; acoustic detection and optical detection. The advantages and disadvantages of each method have been explored and compared. The review suggests that optical detection techniques provide many advantages from the consideration of accuracy and suitability for the applications when compared to other techniques.

Design and Implementation of a High-Speed Real-Time Position Detection System in Electromagnetic Coil Launcher

2020 ◽  
Vol 48 (9) ◽  
pp. 3203-3210
Author(s):  
Guan Xiao Cun ◽  
Shuai Wang ◽  
Denghua Guo ◽  
Shaohua Guan ◽  
Baolong Liu ◽  
...  
Keyword(s):  
Real Time ◽  
High Speed ◽  
Detection System ◽  
Electromagnetic Coil ◽  
Design And Implementation ◽  
Position Detection ◽  
Time Position

scholarly journals Smart Building Surveillance System as Shared Sensory System for Localization of AGVs

2020 ◽  
Vol 10 (23) ◽  
pp. 8452
Author(s):  
Petr Oščádal ◽  
Daniel Huczala ◽  
Jan Bém ◽  
Václav Krys ◽  
Zdenko Bobovský
Keyword(s):  
Sensory System ◽  
Control Unit ◽  
Automated Guided Vehicles ◽  
Building Control ◽  
Smart Building ◽  
Advantages And Disadvantages ◽  
Position Detection ◽  
Surveillance Cameras ◽  
Building Control System ◽  
The Impact

The objective of this study is to extend the possibilities of robot localization in a known environment by using the pre-deployed infrastructure of a smart building. The proposed method demonstrates a concept of a Shared Sensory System for the automated guided vehicles (AGVs), when already existing camera hardware of a building can be utilized for position detection of marked devices. This approach extends surveillance cameras capabilities creating a general sensory system for localization of active (automated) or passive devices in a smart building. The application is presented using both simulations and experiments for a common corridor of a building. The advantages and disadvantages are stated. We analyze the impact of the captured frame’s resolution on the processing speed while also using multiple cameras to improve the accuracy of localization. The proposed methodology in which we use the surveillance cameras in a stand-alone way or in a support role for the AGVs to be localized in the environment has a huge potential utilization in the future smart buildings and cities. The available infrastructure is used to provide additional features for the building control unit, such as awareness of the position of the robots without the need to obtain this data directly from the robots, which would lower the cost of the robots themselves. On the other hand, the information about the location of a robot may be transferred bidirectionally between robots and the building control system to improve the overall safety and reliability of the system.

Laser‐scattering measurement of temperature profiles of a free‐burning arc

1992 ◽  
Vol 60 (11) ◽  
pp. 1304-1306 ◽  
Author(s):  
A. B. Murphy ◽  
A. J. D. Farmer ◽  
J. Haidar
Keyword(s):  
Temperature Profiles ◽  
Laser Scattering ◽  
Scattering Measurement

Laser scattering measurement for laser removal of graffiti

2015 ◽  
Author(s):  
Watcharawee Tearasongsawat ◽  
Phumipat Kittiboonanan ◽  
Chaiya Luengviriya ◽  
Amarin Ratanavis
Keyword(s):  
Laser Scattering ◽  
Scattering Measurement

Further study of spectral ripple with a laser scattering measurement apparatus

2017 ◽  
Vol 393 ◽  
pp. 103-106 ◽  
Author(s):  
Zhongqi Tan ◽  
Zhifu Luo ◽  
Siqi Liu ◽  
Xiaobao Zhang ◽  
Xingwu Long
Keyword(s):  
Laser Scattering ◽  
Measurement Apparatus ◽  
Scattering Measurement

Application of Image Based Methods for Monitoring and Measurements of Structures in Power Stations

2012 ◽  
Vol 518 ◽  
pp. 24-36 ◽  
Author(s):  
Małgorzata Kujawińska ◽  
Marcin Malesa ◽  
Krzysztof Malowany ◽  
Paweł M. Błaszczyk
Keyword(s):  
Power Plants ◽  
Optical Measurement ◽  
Image Correlation ◽  
Optical Methods ◽  
Future Application ◽  
Monitoring And Control ◽  
Full Field ◽  
Advantages And Disadvantages ◽  
Power Stations ◽  
Steam Pipes

The implementation of selected full-field optical methods for monitoring and measurements of displacements, strains and shape of structures in power plants are reported. Digital Image Correlation, Fringe Projection and integrated thermovision-DIC method have been utilized for monitoring and control of repair processes of selected elements during general overhauls in power plants, including control of welds annealing process in boiler drum and steam pipes and measurements of geometry changes of steam pipes in “hot” and “cold” states. The experience gathered during the measurement sessions in power plants has been used for enhancement and adaptation of typical architecture of measurement systems to demanding and difficult industrial environment conditions. The measurements had been carried out in different power plants located in Poland. The possible future application of full-field optical measurement methods as the alternative to standard techniques (ultrasound, X-ray, strain gauges) and their advantages and disadvantages are discussed.

Applying Hypoidal Gearmotors in High Cycling Queue Conveyors

2010 ◽  
Author(s):  
Jun Asai ◽  
Robbie Robinson
Keyword(s):  
Energy Savings ◽  
Thermal Capacity ◽  
Airport Security ◽  
Advantages And Disadvantages ◽  
Test Methodology ◽  
Multi Stage ◽  
Speed Reducer ◽  
Baggage Handling ◽  
Belt Conveyors ◽  
Mechanical Elements

The demands from Airport Baggage Handling Systems continue to expand, seemingly demanding more (faster and more security checks) with less (less people and less energy). Increased airport security drives the need for more baggage inspection points. This in turn drives the need for more automation with the benefit of fewer people screened for secured areas. In addition, airlines and airports are placing more attention to reducing carbon footprint by investigating areas for improving efficiency, but within the overall scope of reliability and flexibility. One area in this investigation is the Queue Conveyor that “meter” (space bags evenly) or “queue” (hold and release) baggage to the next station. These belt conveyors differ from normal belt conveyors due to high start/stop cycling required that can reach 1 cycle per second. Belt conveyors in Airport Baggage Handling Systems typically in the past involved helical bevel right angle or multi-stage helical mechanical speed reducers. And for high cycling start/stop applications, these are fitted with a clutch/brake assembly between the motor and mechanical speed reducer. Newer approaches involving hypoidal gearmotors operated with an AC Speed Drives (often referred to as Variable Frequency Drives or VFDs for short) are being investigated. The hypoidal gearmotor is a more compact package than the existing designs—integrating a mechanical speed reducer with a motor. This new, compact form factor driven with a VFD seems to provide more throughputs with less mechanical elements and less energy usage. This paper will review the advantages and disadvantages of the hypoidal gearmotor method in the Queue Conveyor, supported with simulated test methodology and results. Particular focus of the test will include durability, energy savings potential, and applicability of AGMA service factor in gearmotor selection. Durability will focus on the mechanical components in the high cycle application as well as the thermal capacity of the motor.

Three-channel autoregressive bispectral analysis for the laser scattering measurement of turbulence

1992 ◽  
Vol 54 (10) ◽  
pp. 1249-1256
Author(s):  
N. Iwama ◽  
M. Yoshioka ◽  
F. Sakaguchi ◽  
B. Cabrit ◽  
D. Grésillon
Keyword(s):  
Bispectral Analysis ◽  
Laser Scattering ◽  
Scattering Measurement
Sign in / Sign up

Export Citation Format

Share Document