Buried Object Detection Method Using Optimum Frequency Range in Extremely Shallow Underground

Sugimoto, Takashige; Abe, Touma

doi:10.7567/jjap.50.07hc18

Cited by 10 publications

(8 citation statements)

References 14 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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“…However, the seismo-acoustic method 5,6) using the longitudinal wave of the second kind 7,8) can be used for exploration of such a very shallow area. This method was developed for the exploration of anti-personnel and anti-tank mines, [9][10][11] but it was necessary to adjust the sound source angle with respect to the ground surface in order to increase the generation efficiency of the longitudinal wave of the second kind. Therefore, it was not suitable for long-range measurement and was not actually used.…”

Section: Introductionmentioning

confidence: 99%

A fundamental study for long-distance noncontact shallow underground exploration technology by acoustic irradiation-induced vibration

Sugimoto

Utagawa

et al. 2021

Jpn. J. Appl. Phys.

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A fundamental study was conducted to investigate the possibility of shallow underground exploration from a long distance by acoustic irradiation-induced vibration. To detect buried objects in shallow underground, our method is proposed to excite the ground surface directly from above with sound waves and measure the vibration velocity distribution with a laser Doppler vibrometer. From the experimental results, it was found that the detection frequency is inversely proportional to the size of the buried object, but does not change much even if the buried depth is changed. It was also clarified that the buried object can be detected even if the grazing angle of the laser is about 20 degrees, and that it can be explored even at a distance of about 20 m. From these experiment results, it became clear that there is a possibility of shallow underground exploration using an unmanned aerial vehicle equipped with a small sound source.

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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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Buried Object Detection Method Using Optimum Frequency Range in Extremely Shallow Underground

Cited by 10 publications

References 14 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

A fundamental study for long-distance noncontact shallow underground exploration technology by acoustic irradiation-induced vibration

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

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