Accurate Estimation of Airborne Ultrasonic Time-of-Flight  for Overlapping Echoes

Sarabia, E.G.; Llata, J.R.; Robla, S.; Torre-Ferrero, Carlos; Oria, J.P.

doi:10.3390/s131115465

Cited by 16 publications

(13 citation statements)

References 11 publications

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“…8 Here, we use double sine waves as excitation pulses, one's number is 8, another is 12, because echo wave distortion will not occur and echo response will be rapid relatively.…”

Section: The Mathematical Model Of Ultrasonic Echo Envelopementioning

confidence: 99%

Study of ultrasonic thermometry based on ultrasonic time-of-flight measurement

et al. 2016

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Ultrasonic thermometry is a kind of acoustic pyrometry and it has been evolving as a new temperature measurement technology for various environment. However, the accurate measurement of the ultrasonic time-of-flight is the key for ultrasonic thermometry. In this paper, we study the ultrasonic thermometry technique based on ultrasonic time-of-flight measurement with a pair of ultrasonic transducers for transmitting and receiving signal. The ultrasonic transducers are installed in a single path which ultrasonic travels. In order to validate the performance of ultrasonic thermometry, we make a contrast about the absolute error between the measured temperature value and the practical one. With and without heater source, the experimental results indicate ultrasonic thermometry has high precision of temperature measurement.

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“…8 Here, we use double sine waves as excitation pulses, one's number is 8, another is 12, because echo wave distortion will not occur and echo response will be rapid relatively.…”

Section: The Mathematical Model Of Ultrasonic Echo Envelopementioning

confidence: 99%

Study of ultrasonic thermometry based on ultrasonic time-of-flight measurement

et al. 2016

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“…Therefore, it is important to find an approach for overlapping echoes separation encountered in a wide range of applications such as military and biomedical applications, [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Overlapping Signal Separation Method Using Superresolution Technique Based on Experimental Echo Shape

Al-Oudatallah

Abboud

Khoury

et al. 2017

Advances in Acoustics and Vibration

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Overlapping signals separation is a difficult problem, where time windowing is unable to separate signals overlapping in time and frequency domain filtering is unable to separate signals with overlapping spectra. In this work, a simulation under MATLAB is implemented to illustrate the concept of overlapping signals. We propose an approach for resolving overlapping signals based on Fourier transform and inverse Fourier transform. The proposed approach is tested under MATLAB, and the simulation results validate the effectiveness and the accuracy of the proposed approach. The approach is developed using Gerchberg superresolution technique to cope with signals with low signal-to-noise ratio. For practical work, an echo shape determination is required to apply the proposed technique. The experimental results show accurate localization of multiple targets.

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“…The transduction method differs based on the desired application, the designed number of transducers, and the desired outcome (image, wave velocity calculation, phase shift, etc.) 96 . In all methods, a sensor emitter sends a pulse of several cycles of a signal -usually sinusoidal -which travels through the medium, bounces off reflector surfaces, and is captured by the sensor receiver 96 .…”

Section: Typical Ultrasonic Transduction Modementioning

confidence: 99%

“…96 . In all methods, a sensor emitter sends a pulse of several cycles of a signal -usually sinusoidal -which travels through the medium, bounces off reflector surfaces, and is captured by the sensor receiver 96 . The received signal depends on the experimental setup; in a single (echo/reflection) transducer setup, the same transducer both emits the signal and receives the reflected wave 96 .…”

Section: Typical Ultrasonic Transduction Modementioning

confidence: 99%

“…In all methods, a sensor emitter sends a pulse of several cycles of a signal -usually sinusoidal -which travels through the medium, bounces off reflector surfaces, and is captured by the sensor receiver 96 . The received signal depends on the experimental setup; in a single (echo/reflection) transducer setup, the same transducer both emits the signal and receives the reflected wave 96 . In a two-transducer setup (transmission), a receiving transducer, placed on the opposite side of the tested area from the sending transducer, receives the remnants of the original wave after it fully propagates through the limb 96 .…”

Section: Typical Ultrasonic Transduction Modementioning

confidence: 99%

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Design and Validation of a Wearable, Continuous, and Non-Invasive Hydration Monitor that uses Ultrasonic Pulses to Detect Changes in Tissue Hydration Status

Engman¹

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Design and Validation of A Wearable, Continuous, and Non-Invasive Hydration Monitor That Uses Ultrasonic Pulses to Detect Changes in Tissue Hydration Status Zoie EngmanChronic dehydration is an endemic problem for many population groups. Current methods of monitoring hydration status are invasive, time consuming, cannot be performed while exercising, and require lab resources. A proposed solution is a wearable, continuous, and non-invasive device that uses harm-free ultrasonic pulses to detect changes in tissue hydration status over time. Customer and engineering requirements were defined and used to guide the design process. Literature reviews were performed to identify essential information on dehydration, assess current methods, discover state of the art devices, and describe ultrasonic theory. Market research was performed to identify athletes as the target population group. An adjustable elastic nylon bicep band prototype was manufactured and the integration of more advanced components was proposed. The theoretical signal processing method used to detect hydration status was validated through initial tests with a prototype electrical system composed of a Teensy 3.1 board, two 18 kHz piezoceramic disc elements, and an Arduino/LabVIEW interface. Tests with aluminum, rubber, and sponge materials were performed to compare the signal response to propagation through materials with different acoustic properties and water contents. Finally, tests performed with dehydrated bovine muscle tissue revealed a statistically significant difference between hydrated and dehydrated tissue, a promising indication for future device refinement.

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Accurate Estimation of Airborne Ultrasonic Time-of-Flight for Overlapping Echoes

Cited by 16 publications

References 11 publications

Study of ultrasonic thermometry based on ultrasonic time-of-flight measurement

Study of ultrasonic thermometry based on ultrasonic time-of-flight measurement

Overlapping Signal Separation Method Using Superresolution Technique Based on Experimental Echo Shape

Design and Validation of a Wearable, Continuous, and Non-Invasive Hydration Monitor that uses Ultrasonic Pulses to Detect Changes in Tissue Hydration Status

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