Results 41 to 50 of about 31,995 (276)

Design of physiological indexes monitoring system for underground personnel based on ZigBee

open access: yesGong-kuang zidonghua, 2014
In view of problem that traditional underground personnel monitoring system is usually used for underground personnel positioning and hard to obtain physiological indexes of underground personnel, a physiological indexes monitoring system for underground
HUANG Jianbo, ZHU Zongjiu, XU Hua
doaj   +1 more source

Use of Automatic Target Recognition System for the Displacement Measurements in a Small Diameter Tunnel Ahead of the Face of the Motorway Tunnel During Excavation [PDF]

open access: yes, 2008
During construction of the Sentvid tunnel a unique opportunity arose to measure the 3D displacements ahead of the motorway tunnel excavation face, since the exploratory tunnel was already constructed in the axis of the main tunnel.
Ambrožič, Tomaž   +5 more
core   +2 more sources

Overall requirements for an advanced underground coal extraction system [PDF]

open access: yes, 1980
Underground mining systems suitable for coal seams expoitable in the year 2000 are examined with particular relevance to the resources of Central Appalachia. Requirements for such systems may be summarized as follows: (1) production cost; (2)miner safety;
Goldsmith, M., Lavin, M. L.
core   +2 more sources

Influence of underground radio wave on human body in coal mine

open access: yesGong-kuang zidonghua, 2022
The large-power radio waves emitted by 5G, WiFi6, UWB, ZigBee and other mine mobile communication systems and personnel and vehicle positioning systems will affect the health of underground personnel.
DING Xuhai   +3 more
doaj   +1 more source

Piggybacking on an Autonomous Hauler: Business Models Enabling a System-of-Systems Approach to Mapping an Underground Mine

open access: yes, 2017
With ever-increasing productivity targets in mining operations, there is a growing interest in mining automation. In future mines, remote-controlled and autonomous haulers will operate underground guided by LiDAR sensors.
Borg, Markus   +2 more
core   +1 more source

Weighted centroid localization algorithm based on node cooperation in coal mine underground

open access: yesGong-kuang zidonghua, 2018
In view of problems of large attenuation error and low positioning accuracy of personnel positioning signal in underground long-distance roadway, a weighted centroid localization algorithm based on node cooperation was proposed.
ZHAO Tong   +4 more
doaj   +1 more source

Precise positioning method of underground moving target based on distance measurement technology

open access: yesGong-kuang zidonghua, 2015
In view of problem that the accuracy of existing personnel positioning system is not high and ca't meet demand of precise positioning, a precise positioning method of underground moving target based on distance measurement technology was proposed.
LI Zhengdong, ZHANG Kefan, BAO Jianju
doaj   +1 more source

Regional Monitoring Controller Based on Underground Multi-systems

open access: yesMeikuang Anquan, 2020
A regional monitoring controller based on safety monitoring system, personnel positioning system, information guidance publishing system and broadcasting system is designed.
ZHOU Daiyong
doaj   +1 more source

LSTM Network-Assisted Binocular Visual-Inertial Person Localization Method under a Moving Base

open access: yesApplied Sciences, 2023
In order to accurately locate personnel in underground spaces, positioning equipment is required to be mounted on wearable equipment. But the wearable inertial personnel positioning equipment moves with personnel and the phenomenon of measurement ...
Zheng Xu, Zhong Su, Dongyue Dai
doaj   +1 more source

Design and application of multi-functional wireless information transmission platform based on 802.11

open access: yesGong-kuang zidonghua, 2014
In view of problems of single function and low positioning accuracy existed in underground personnel positioning system, an intrinsic safety and multi-functional wireless information transmission platform based on 802.11n was designed.
LIU Zhigao, DING Qingqing
doaj   +1 more source

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