Study on Water Distribution Imaging in the Sand Using Propagation Velocity of Sound with Scanning Laser Doppler Vibrometer

Sugimoto, Tsuneyoshi; Nakagawa, Yutaka; Sügimura, Takashi; Sano, Motoaki; Ohaba, Motoyoshi; Shibusawa, Sakae

doi:10.7567/jjap.52.07hc04

Cited by 7 publications

(7 citation statements)

References 25 publications

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“…[126][127][128][129]132,133,[191][192][193][194][195][196][197][198] In addition, buried objects and the distribution of soil properties have been visualized as examples of underground measurements. 143,185,[199][200][201][202][203][204][205][206][207] …”

Section: Transmittermentioning

confidence: 99%

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Mizutani¹,

Wakatsuki²,

Ebihara³

2016

Jpn. J. Appl. Phys.

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Measurementthe act of measuring physical properties that we performhas the potential to contribute to the successful advancement of sciences and society. To open doors in physics and other sciences, various measurement methods and related applications have been developed, and ultrasound has remained a useful probe, power source, and interesting measurement object for the past two centuries. In this paper, we first summarize the basic principles of ultrasound from the viewpoint of measurement techniques for readers who just have started studying or are interested in the field of ultrasonic electronics. Moreover, we also introduce recent studiesultrasonic properties of materials, measurement techniques, piezoelectric devices, nonlinear acoustics, biomedical ultrasound, and ocean acousticsand their trends related to measurement techniques in ultrasonic electronics to provide some ideas for related applications.

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Section: Transmittermentioning

confidence: 99%

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Mizutani¹,

Wakatsuki²,

Ebihara³

2016

Jpn. J. Appl. Phys.

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“…On the other hand, we have also attempted the visualization of the water distribution in soil by measuring the sound velocity using a scanning laser Doppler vibrometer (SLDV) [15][16][17][18][19][20]. By using these techniques, we are aiming to perform the most suitable irrigation control to save water in soil culture by adopting ''negativepressure-difference irrigation'', which is reported to be effective for cultivating plants as well as saving water [21].…”

Section: Introductionmentioning

confidence: 99%

Estimation of water stress of plant by vibration measurement of leaf using acoustic radiation force

Sano

Nakagawa

Sugimoto

et al. 2015

Acoust. Sci. & Tech.

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In order to estimate the water stress of a plant, the natural frequency of the leaf-stalk system was investigated. As a means of vibrating the leaf, acoustic radiation force was utilized, and the successive measurement of the natural frequency of ''komatsuna'', which was cultivated in a pot of soil, was performed for a week until wilting after stopping irrigation. As a result, it was found that the natural frequency is decreased drastically by the wilting of the leaf before the drooping occurs. In addition, daily variation was also observed in the early days, but it was gradually suppressed as the day went on. These behaviors were discussed referring to a simple cantilever beam model. In conclusion, it was ascertained that the acoustic radiation force is efficient for vibrating a leaf-stalk system. Furthermore, it was confirmed that measuring the natural frequency of the leaf-stalk system is effective for the early detection of water stress of a plant.

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“…The method uses high-intensity aerial ultrasonic waves and optical equipment, and our aim is to develop a system based on this method for practical use. We previously developed a nondestructive inspection method [1][2][3][4][5][6][7][8][9] of this type for detecting internal defects and peeling in solid materials, where fire damage 10,11) in concrete samples is detected from the vibration of concrete excited by ultrasonic waves.…”

Section: Introductionmentioning

confidence: 99%

Basic study of an estimation method for fire damage within concrete sample using high-intensity ultrasonic waves and optical equipment

Osumi

Enomoto

Ito

2014

Jpn. J. Appl. Phys.

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After a fire in a concrete building, concrete walls may need to be entirely or partially repaired depending on the size of the fire. If the building is to be repaired, it is necessary to determine the extent and cost of the work. To do so, a method is needed for determining the level of fire damage within concrete walls, particularly along the depth direction. In a previous work, we have investigated a noncontact, nondestructive method using highintensity aerial ultrasonic waves and optical equipment to detect the level of fire damage on the concrete surface, and we have demonstrated the feasibility of obtaining such information. Yet it is also important to determine the level of fire damage within concrete sample, particularly along the depth direction, in order to determine the extent of necessary repairs. In this study, we examined a new noncontact, minimally destructive method for estimating the level of fire damage within concrete sample. The results show that the level of fire damage could be determined along the depth direction.

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Study on Water Distribution Imaging in the Sand Using Propagation Velocity of Sound with Scanning Laser Doppler Vibrometer

Cited by 7 publications

References 25 publications

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Estimation of water stress of plant by vibration measurement of leaf using acoustic radiation force

Basic study of an estimation method for fire damage within concrete sample using high-intensity ultrasonic waves and optical equipment

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