Feasibility of ultrasound positioning based on signal strength

Medina, Carlos Alberto Guerrero; Segura, José C.; Holm, Sverre

doi:10.1109/ipin.2012.6418917

Cited by 27 publications

(13 citation statements)

References 6 publications

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“…However, it has a lower level of accuracy (in centimeters) and suffers a lot of interference from reflected ultrasound signals propagated around by other sources such as the collision of metals. Some recent research work [32,33] was carried out under ultrasound based indoor localization.…”

Section: Position Systemsmentioning

confidence: 99%

Recent Advances in Wireless Indoor Localization Techniques and System

Farid

Nordin

Ismail

2013

Journal of Computer Networks and Communications

419

228

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The advances in localization based technologies and the increasing importance of ubiquitous computing and context-dependent information have led to a growing business interest in location-based applications and services. Today, most application requirements are locating or real-time tracking of physical belongings inside buildings accurately; thus, the demand for indoor localization services has become a key prerequisite in some markets. Moreover, indoor localization technologies address the inadequacy of global positioning system inside a closed environment, like buildings. Based on this, though, this paper aims to provide the reader with a review of the recent advances in wireless indoor localization techniques and system to deliver a better understanding of state-of-the-art technologies and motivate new research efforts in this promising field. For this purpose, existing wireless localization position system and location estimation schemes are reviewed, as we also compare the related techniques and systems along with a conclusion and future trends.

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Section: Position Systemsmentioning

confidence: 99%

Recent Advances in Wireless Indoor Localization Techniques and System

Farid

Nordin

Ismail

2013

Journal of Computer Networks and Communications

419

228

View full text Add to dashboard Cite

show abstract

“…Beyond 5 m, the error-free transmission range could be achieved using 3-channel BPSK modulation scheme with a reduce data rate of 30 kb/s. The transmission distance can be estimated based on the received signal strength (RSS) [29], [30]. As the RMS values of the received signal in different propagation ranges can be predicted by the simulation model, different schemes are chosen in terms of the distance measured.…”

Section: Range-dependent Modulation Schemementioning

confidence: 99%

Multichannel Ultrasonic Data Communications in Air Using Range-Dependent Modulation Schemes

Jiang

Wright

2016

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Access to the full text of the published version may require a subscription. Abstract-There are several well-developed technologies of wireless communication such as radio frequency (RF) and infrared (IR), but ultrasonic methods can be a good alternative in some situations. A multi-channel airborne ultrasonic data communication system is described in this paper. On-Off Keying (OOK) and binary phase-shift keying (BPSK) modulation schemes were implemented successfully in the system by using a pair of commercially available capacitive ultrasonic transducers in a relatively low multi-path indoor laboratory environment. Six channels were used from 50 kHz to 110 kHz with a channel spacing of 12 kHz, allowing multiple 8-bit data packets to be transmitted simultaneously. The system data transfer rate achieved was up to 60 kb/s, and ultrasonic wireless synchronization was implemented, instead of using a hard-wired link. A model developed in the work could accurately predict ultrasonic signals through the air channels. Signal root mean square (RMS) values and system bit error rates (BER) were analysed over different distances. Error-free decoding was achieved over ranges up to 5 m using a multi-channel OOK modulation scheme. To obtain the highest data transfer rate and the longest error-free transmission distance, a range-dependent multi-channel scheme with variable data rates, channel frequencies and different modulation schemes, was also studied in the work. Within 2 m, error-free transmission was achieved using 5-channel OOK with a data rate of 63 kb/s. Between 2 and 5 m, 6-channel OOK with 60 kb/s data transfer rate was error-free. Beyond 5 m, the error-free transmission range could be extended up to 10 m using 3-channel BPSK with a reduced data rate of 30 kb/s. The situation when two transducers were misaligned using 3-channel OOK and BPSK schemes was also investigated in the work. It was concluded that error-free transmission could still be achieved with a lateral displacement of less than 7% and oblique angles of less than 7 Rights• , and 3-channel BPSK proved to be more robust than 3-channel OOK with transducer misalignment.

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“…Ultrasound is based on the same principle as used by bats for navigation, namely sound waves with very high frequencies [18]. Distance is estimated by measuring the time it takes for the ultrasound signal to travel from the transmitter to a receiver.…”

Section: Ultrasoundmentioning

confidence: 99%

Localizing operators in the smart factory: A review of existing techniques and systems

Syberfeldt

Ayani

Holm

et al. 2016

2016 International Symposium on Flexible Automation (ISFA)

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The aim of this paper to give a comprehensive overview of existing techniques and state-of-the-art systems for indoor localization that could be adopted in smart factories of the future. We present different techniques for calculating the position of a moving object using signal transmission and signal measurement, and compare their advantages and disadvantages. The paper also includes a discussion of various localization systems available in the market and compares their most important features. It ends with a discussion of important issues to consider in future work in order to fully implement indoor, real-time localization of operators in the smart factory. INTRODUCTIONThe term "smart factory" refers to the fourth industrial revolution (also called Industry 4.0) and a groundbreaking technological evolution towards cyber-physical systems [1]. With smart factories comes a paradigm shift from centralized to decentralized production which is enabled through the concept of the "Internet-of-Things" [2]. The Internet-of-Things basically means that all objects in a factory (such as machines, tools, products, and human operators) are connected to the Internet and share information with each other [3]. When all objects are online, entirely new possibilities emerge for developing intelligent and adaptive IT-based support systems that can make shop floor operators more flexible and efficient. For example, instead of using traditional, static user interfaces it becomes possible to dynamically download the user interface from the Internet and adapt the information content based on the operator's location. This requires that the positions of all operators are tracked in real-time, which creates a requirement for efficient

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Feasibility of ultrasound positioning based on signal strength

Cited by 27 publications

References 6 publications

Recent Advances in Wireless Indoor Localization Techniques and System

Recent Advances in Wireless Indoor Localization Techniques and System

Multichannel Ultrasonic Data Communications in Air Using Range-Dependent Modulation Schemes

Localizing operators in the smart factory: A review of existing techniques and systems

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