Results 21 to 30 of about 31,995 (276)
Underground personnel positioning system based on fingerprint and dead-reckoning
Gong-kuang zidonghua, 2016 In view of problem that RSSI-based fingerprint positioning method is greatly influenced by environment of coal mine tunnel, and localization method based on dead-reckoning is easy to form accumulation of errors, underground personnel positioning system ...
MA Jing +3 more
doaj +2 more sources
Gong-kuang zidonghua, 2015 In view of problem of high cost and big construction difficulty of existing accurate personnel positioning system which needs two base stations to complete direction recognition function, a kind of direction recognition technology based on single base ...
TANG Lijun, WU Wei
doaj +2 more sources
Design of Wireless Tracking and Positioning System of Underground Personnel Based on WiFi and ZigBee
Gong-kuang zidonghua, 2011 In order to solve problems of high cost, complex installation and limitation of zone location of current mine personnel positioning system, the paper put forward a design scheme of wireless tracking and positioning system of underground personnel based ...
JIANG Lei +3 more
doaj +1 more source
Underground Personnel Positioning Method Based on Self-training and NLOS Suppression
Taiyuan Ligong Daxue xuebao[Purposes] The research of precise location of underground personnel in coal mine is of great significance to protect their life safety. The ultra-wideband signal is susceptible to non-lineof- sight (NLOS) interference, which will seriously affects the ...
SHAO Xiaoqiang +5 more
doaj +2 more sources
Improvement of Anti-collision Algorithm of Underground Personnel Positioning System
Gong-kuang zidonghua, 2012 In order to solve data collision problem caused by multiple tags sending information to receptor in underground personnel positioning system, an improved algorithm of binary exponential backoff was proposed. The algorithm sets two threshold values by way
CHEN Hong
doaj +1 more source
Management System for Precise Location Map of Underground Personnel Based on 3D GIS
Meikuang Anquan, 2020 Aiming at the problems that the spatial performance of underground tunnels in two-dimensional GIS simulation maps of coal mine underground positioning systems is not intuitive and the location of personnel is inaccurate, based on the monitoring data of ...
HONG Yuling
doaj +1 more source
Three-dimensional personnel safety positioning based on improved UKF under complex coal mine environment [PDF]
E3S Web of Conferences, 2021 Aiming at the problems of strong interference and poor positioning accuracy in coal mines, this paper proposes a positioning algorithm for accurate detection of personnel safety.
Xu Hongxiang +3 more
doaj +1 more source
Algorithm of Underground Personnel Positioning Based on Improved Monte Carlo
Wireless Communications and Mobile Computing, 2021 In order to improve the positioning accuracy of underground targets, especially the positioning accuracy of moving targets, an improved weighted Monte Carlo positioning algorithm is proposed. In the sampling initialization stage, the beacon node gradually constructs the sampling area according to the RSSI size and combines the Monte Carlo method to ...
openaire +1 more source
Research on wearable devices for safety of underground mine personnel
Gong-kuang zidonghua, 2018 In view of problems of low positioning accuracy of underground personnel positioning system and incomplete functions of underground personnel vital signs monitoring system, a wearable device with functions of personnel positioning, falling or lying ...
MA Yujing +4 more
doaj +1 more source
Target Tracking in Confined Environments with Uncertain Sensor Positions [PDF]
, 2015 To ensure safety in confined environments such as mines or subway tunnels, a (wireless) sensor network can be deployed to monitor various environmental conditions.
Larsson, Erik G. +2 more
core +2 more sources