Results 21 to 30 of about 77 (65)

Research on explosion-proof technology for coal mine rescue robot

Gong-kuang zidonghua, 2019
The paper introduced general situation of explosion-proof technology of coal mine rescue robot, and summarized the research status and application of explosion-proof technology of coal mine rescue robot at home and abroad, and pointed out some progress ...
ZHENG Xuezhao, YAN Xing, GUO Jun, ZHANG Duo   +3 more
doaj   +1 more source

Health status identification of catenary based on VMD and FA-ELM

Journal of Algorithms & Computational Technology, 2021
Catenary works as a key part in the electric railway traction power supply system, which is exposed outdoors for a long time and the failure rate is very high. Once a failure occurs, it will directly affect the driving safety. Based on the above, a model
Lingzhi Yi, You Guo, Nian Liu, Jian Zhao, Wang Li, Junyong Sun   +5 more
doaj   +1 more source

Optimization Design of Intrinsic Safety Pilot Circuit for Motor Remote Start and Stop

Meikuang Anquan, 2020
This paper introduces the types of remote starting and stopping pilot circuits of existing motors, the existence of mis-starting, the inability to identify all line faults and the unstable operation of power supply voltage reduction, and proposes an ...
ZHANG Yuxiang, SONG Jiancheng, TIAN Muqin
doaj   +1 more source

Design of a type of intrinsic safety miner lamp with identification card

Gong-kuang zidonghua, 2013
In view of problems that equipments carried by underground miner increase because of individual design and power supply of identification card, and sometimes positioning would fail because that charging or change of battery of identification card are not
HUO Yin-jia, GU Yi-dong
doaj   +1 more source

Supporting Solidarity

Voices in Bioethics, 2023
Photo ID 72893750 © Rawpixelimages|Dreamstime.com ABSTRACT Solidarity is a concept increasingly employed in bioethics whose application merits further clarity and explanation.
Claire Moore, Ariadne Nichol, Holly Taylor   +2 more
doaj   +1 more source

A Single-Stage Isolated Battery Charger Using Nonbridged Positive Cuk Converter Configuration

IET Electrical Systems in Transportation, 2023
This article presents a nonbridged isolated positive Cuk (NB-IPCuk) converter-based single-stage battery charging system (SSBCS). The architecture of the suggested charger ensures the intrinsic advantage of power quality improvement in discontinuous ...
Tanmay Shukla, N. P. Patidar, Apsara Adhikari   +2 more
doaj   +1 more source

Design of Explosion-proof and Intrinsic Safety DC Stabilized UPS Used in Coal Mine

Gong-kuang zidonghua, 2012
The paper put forward a design scheme of explosion-proof and intrinsic safety DC stabilized UPS used in coal mine based on the principle and characteristics of intrinsic safety power supply, introduced design of main circuit of the power supply.
ZHAO Si-hai, ZHOU Jie
doaj  

Automatic detection device for mining intrinsic safety power supply based on PWM

Meikuang Anquan
Aiming at the problems of cumbersome factory inspection steps, low inspection efficiency, and poor consistency of protection parameter measurement results for intrinsically safe power supplies used in mining, a high-precision fully automatic factory ...
Dedong ZOU
doaj   +1 more source

Characteristics of coal mine accidents and new technologies of coal mine communication, personnel positioning and monitoring

Gong-kuang zidonghua, 2015
The paper analyzed characteristics of gas, water and roof accidents of coal mine during 2009-2013, obtained numbers of accidents and deaths accounted for 78.54% and 78.80% respectively at mining working face of the most accidents.
SUN Jiping
doaj   +1 more source

Research on transient energy suppression strategy of intrinsically safe output power supply for mine

Meikuang Anquan
In response to the requirements of GB/T 3836.4—2021 Explosive atmosphere Part 4: Equipment with protection by intrinsic safety “i” for outputting transient energy of intrinsically safe power sources based on the principle of semiconductor rapid short ...
Changna GUO
doaj   +1 more source