Customization of UWB 3D-RTLS Based on the New Uncertainty Model of the AoA Ranging Technique

Jachimczyk, Bartosz; Dziak, Damian; Kulesza, Wlodek

doi:10.3390/s17020227

Cited by 15 publications

(7 citation statements)

References 38 publications

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“…It has a good application potential in the field of wireless indoor positioning. UWB takes advantage of ultra-wideband signals that are suitable for high-speed and short-range wireless transition due to their wide spectrum range [ 12 ]. Compared to other narrow-band transition systems, it is less susceptible to multipath interference, thus it has the capability of real-time tracking for multiple targets with high sampling speed, high accuracy and low energy consumption [ 13 ].…”

Section: Overview Of Sensor-based Technologymentioning

confidence: 99%

Applying Sensor-Based Technology to Improve Construction Safety Management

Zhang

Cao

Zhao

2017

Sensors

122

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Construction sites are dynamic and complicated systems. The movement and interaction of people, goods and energy make construction safety management extremely difficult. Due to the ever-increasing amount of information, traditional construction safety management has operated under difficult circumstances. As an effective way to collect, identify and process information, sensor-based technology is deemed to provide new generation of methods for advancing construction safety management. It makes the real-time construction safety management with high efficiency and accuracy a reality and provides a solid foundation for facilitating its modernization, and informatization. Nowadays, various sensor-based technologies have been adopted for construction safety management, including locating sensor-based technology, vision-based sensing and wireless sensor networks. This paper provides a systematic and comprehensive review of previous studies in this field to acknowledge useful findings, identify the research gaps and point out future research directions.

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Section: Overview Of Sensor-based Technologymentioning

confidence: 99%

Applying Sensor-Based Technology to Improve Construction Safety Management

Zhang

Cao

Zhao

2017

Sensors

122

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“…Anchor nodes are radio-frequency (RF) devices which are placed in many areas and which function to measure distances to a target node. Certain methods such as the time of arrival (TOA) [7], the time difference of arrival (TDOA) [8], the received signal strength indicator (RSSI) [9,10], and the angle of arrival (AOA) [11] have been proposed in many studies to measure distances. When using the TOA method, the distance is measured by calculating the time of a signal which travels from the anchor to the target node.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Position Estimation Error of a Local Positioning System utilizing Mobile Anchors

Lee¹,

Rizal²,

Ahn³

2018

Preprint

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This paper proposes a real-time local positioning system (RT-LPs) utilizing a mobile platform equipped with three anchor nodes placed in a right-angle triangle formation for a real-time locating system (RTLS). After deriving an analytic formula to calculate the target position utilizing the measured distances among anchor nodes and the target node, we find that four parameters have an effect on the position error of the target node. The spacing between anchors is a design parameter that must be large enough to the reduce position error. However, the distance from the anchor node to the target node is an operation parameter that must be small enough to reduce the position error. Additionally, the measured ranges among the anchors and the target node have probabilistic distributions with a mean and variance, which are dominant parameters that have effects on the position error. A comparison study was conducted to determine the effects of the parameters of the target position in both a simulation and an experiment, showing rates of approximately 4% ~ 10%. These findings indicate that our simulation can work properly with the proposed method after assuming that the distance error is a Gaussian model.

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“…A number of technologies have been introduced for improving localization accuracy (up to centimeters) in the absence of the GPS, such as WLAN [ 11 , 12 ], Bluetooth [ 13 , 14 ], ZigBee [ 15 , 16 ], Ultrasound [ 17 ], GSM/CDMA [ 18 , 19 ], Acoustic Position System (APS) [ 20 ], and Ultra-Wide Band (UWB) technology [ 21 , 22 , 23 , 24 ]. The localization approaches are usually classified into three categories: (1) range-based [ 25 ], (2) angle-based [ 26 ] and (3) proximity-based [ 27 ]. Among these, range-based systems are considered to be more accurate [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

A Practical, Robust and Fast Method for Location Localization in Range-Based Systems

Huang

Wu²,

Misra

2017

Sensors

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Location localization technology is used in a number of industrial and civil applications. Real time location localization accuracy is highly dependent on the quality of the distance measurements and efficiency of solving the localization equations. In this paper, we provide a novel approach to solve the nonlinear localization equations efficiently and simultaneously eliminate the bad measurement data in range-based systems. A geometric intersection model was developed to narrow the target search area, where Newton’s Method and the Direct Search Method are used to search for the unknown position. Not only does the geometric intersection model offer a small bounded search domain for Newton’s Method and the Direct Search Method, but also it can self-correct bad measurement data. The Direct Search Method is useful for the coarse localization or small target search domain, while the Newton’s Method can be used for accurate localization. For accurate localization, by utilizing the proposed Modified Newton’s Method (MNM), challenges of avoiding the local extrema, singularities, and initial value choice are addressed. The applicability and robustness of the developed method has been demonstrated by experiments with an indoor system.

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Customization of UWB 3D-RTLS Based on the New Uncertainty Model of the AoA Ranging Technique

Cited by 15 publications

References 38 publications

Applying Sensor-Based Technology to Improve Construction Safety Management

Applying Sensor-Based Technology to Improve Construction Safety Management

Analysis of the Position Estimation Error of a Local Positioning System utilizing Mobile Anchors

A Practical, Robust and Fast Method for Location Localization in Range-Based Systems

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