Results 21 to 30 of about 864,674 (267)
Application of Technologies of Misorientation Protection and Compulsory Deceleration of Mine Hoist
Gong-kuang zidonghua, 2010 Based on the current situation of obsolescence in equipments and backward in technology of hoist control system in No.8 Coal Mine of Pingdingshan Coal Corporation Group, the paper analyzed problems of insufficiency of misorientation protection and hidden
SHEN Zhan-bin, ZHANG Hui-na
doaj +1 more source
Unipolar deviation control algorithm and its application in mine hoist mechanical braking system
Gong-kuang zidonghua, 2016 A kind of unipolar deviation control algorithm was proposed and applied to mine hoist mechanical braking system. The algorithm can change a feedback control system from no error system to error system, which is beneficial to improve system stability and ...
DENG Shijian +4 more
doaj +2 more sources
Energies, 2020 The friction wear and thermal fatigue cracking of the brake shoe and friction-induced self-excited vibration (frictional flutter) of the disc brake can easily occur during emergency braking of a deep coal mine hoist with at high speed and with a heavy ...
Dagang Wang +4 more
doaj +2 more sources
Precise identification method of mine hoist fault source based on MFCC-CS-MUSIC
Meitan kexue jishu, 2023 In the field of coal mine production, the mine hoist, as a kind of auxiliary transportation equipment, plays a very important role in the whole transportation engineering of the mine.
LI Jingzhao, WANG Xiao, SUN Jiechen
doaj +1 more source
Mechanics & Industry, 2023 Electromechanical braking system is the key way to improve the braking response ability of mine hoist. At present, the reliability research of electromechanical braking system is less.
Hua-Wei Jin +3 more
semanticscholar +1 more source
Research on image enhancement algorithm for the monitoring system in coal mine hoist
Measurement and control (London. 1968), 2023 As the mine hoist monitors video images with poor light, low brightness, heavy dust, and low contrast, the monitoring video images are not conducive to monitoring. They cannot meet the needs of applications.
Wei Zhang +3 more
semanticscholar +1 more source
MHlinker: Research on a Joint Extraction Method of Fault Entity Relationship for Mine Hoist
Electronics, 2023 Triplet extraction is the key technology to automatically construct knowledge graphs. Extracting the triplet of mechanical equipment fault relationships is of great significance in constructing the fault diagnosis of a mine hoist.
Xiaochao Dang +5 more
semanticscholar +1 more source
Application of vibration signal detection in mine hoist fault monitoring system
Journal of Measurements in Engineering, 2023 Due to the harsh working environment and various types of faults in mine hoists, the implementation of conventional detection is relatively difficult. In order to improve the maintenance and fault detection efficiency of mine hoist, a portable vibration ...
Yong-Hong Fan, Jinyan Zhang, Daoping Han
semanticscholar +1 more source
DdERT: Research on Named Entity Recognition for Mine Hoist Using a Chinese BERT Model
Electronics, 2023 This study aims to solve the problem of named entity recognition of complex mechanical equipment faults, especially the problems of many professional terms, long sentences, fuzzy entity boundaries, entity nesting, and abbreviation ambiguity, in mine ...
Xiao-Chao Dang +4 more
semanticscholar +1 more source
Accurate Recognition Method for Rolling Bearing Failure of Mine Hoist in Strong Noise Environment
Machines, 2023 The operating environment of rolling bearings in mine hoists is complicated, and detecting their faults is hindered by a weak and unstable initial vibration signal. This directly affects the ability to extract pertinent fault features.
Chunyang Liu +7 more
semanticscholar +1 more source