Estimating the 3D-position from time delay data of US-waves: experimental analysis and a new processing algorithm

Martín, José Miguel Martín; Jiménez, Antonio R.; Seco, Fernando; Calderón, L.; Pons, José L; Ceres, R.

doi:10.1016/s0924-4247(02)00211-x

Cited by 32 publications

(14 citation statements)

References 9 publications

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“…The effect of indoor airflows due to air-conditioning was investigated in [20,21]. In order to reduce the influence of wind, [27] suggested estimating the sound velocity continuously by measuring the travel time for a known distance in proximity and correcting the other measurements accordingly. The next step is to produce CDMA signals.…”

Section: Precalculationsmentioning

confidence: 99%

A novel acoustic indoor localization system employing CDMA

Sertatıl

Altınkaya

Raoof

2012

Digital Signal Processing

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Nowadays outdoor location systems have been used extensively in all fields of human life from military applications to daily life. However, these systems cannot operate in indoor applications. Hence, this paper considers a novel indoor location system that aims to locate an object within an accuracy of about 2 cm using ordinary and inexpensive off-the-shelf devices and that was designed and tested in an office room to evaluate its performance. In order to compute the distance between the transducers (speakers) and object to be localized (microphone), time-of-arrival measurements of acoustic signals consisting of Binary Phase Shift Keying modulated Gold sequences are performed. This DS-CDMA scheme assures accurate distance measurements and provides immunity to noise and interference. Two methods have been proposed for location estimation. The first method takes the average of four location estimates obtained by trilateration technique. In the second method, only a single robust position estimate is obtained using three distances while the least reliable fourth distance measurement is not taken into account. The system's performance is evaluated at positions from two height levels using system parameters determined by preliminary experiments. The precision distributions in the work area and the precision versus accuracy plots depict the system performance. The proposed system provides location estimates of better than 2 cm accuracy with 99% precision.

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Section: Precalculationsmentioning

confidence: 99%

A novel acoustic indoor localization system employing CDMA

Sertatıl

Altınkaya

Raoof

2012

Digital Signal Processing

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“…In the actual survey the nth receiver in the ith survey distance is as shown in (1). i v is the ith survey speed of sound, pni t is TOF of the nth receiver in the ith survey [6].…”

Section: Reason and Error Estimationmentioning

confidence: 99%

“…Y C Yang [3] used the small aperture square matrix to conduct the passive sound survey localization research. They used the different time of ultrasonic wave arriving to different ultrasonic receivers to localization [4][5][6][7][8][9]. C S Xiong and G Peng [10] uses wave head counts and the zero intersection examination to improve localization accuracy.…”

mentioning

confidence: 99%

Localization Research Based on Special Fusion Method for Redundancy Ultrasonic Information

Jiang

Yan

Zang

et al. 2007

2007 International Conference on Mechatronics and Automation

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This paper proposes a novel method to improve the accuracy of ultrasonic absolute localization. The characteristic and problem of ultrasonic absolute localization are analyzed and the insufficiency in existing methods is pointed out. Aiming at these questions, the special fusion method for redundancy ultrasonic information (SFMRUI) has been proposed. SFMRUI can well eliminate the error about times of flight (TOF) and can accurately calculate the wave lagging error. Moreover it can give an estimation of the measuring accuracy. Finally the experiment and the simulation have been performed, the experiment and the simulation results proved the SFMRUI law is effective and it can greatly improve the absolute localization accuracy. Index Terms -Ultrasonic absolute localization, Redundancy ultrasonic information, Times of flight, Wave lagging error

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“…In dynamical systems, time delay may have negative effects such as instability and/or reduction in performance. On the other hand, its accurate identification is crucial for several signal processing applications such as distance measurement and localization systems [1], [2], [3], [4], [5]. Due to its occurrence in several disciplines and to overcome its negative effects, a significant amount of research was devoted to time delay phenomenon, its effects on systems, and identification and control methods.…”

Section: Introductionmentioning

confidence: 99%

A novel online adaptive time delay identification technique

Bayrak

Tatlıcıoğlu

2011

IEEE Conference on Decision and Control and European Control Conference

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Abstract-In this study, an online time delay identification technique is proposed. Different from the relevant literature, the time delay is considered as a nonlinear parameter and nonlinear parameter estimation techniques are adopted. The stability of the adaptive update law can be guaranteed via Lyapunov based arguments and numerical simulations are conducted to demonstrate the proof of concept.

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Estimating the 3D-position from time delay data of US-waves: experimental analysis and a new processing algorithm

Cited by 32 publications

References 9 publications

A novel acoustic indoor localization system employing CDMA

A novel acoustic indoor localization system employing CDMA

Localization Research Based on Special Fusion Method for Redundancy Ultrasonic Information

A novel online adaptive time delay identification technique

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