A self-powered acoustic sensor excited by ultrasonic wave for detecting and locating underwater ultrasonic sources

Guan, Zhengxin; Liu, Liqiang; Xu, Xinwen; Liu, Acan; Wu, Hsiao-Ling; Li, Jun; Ou‐Yang, Wei

doi:10.1016/j.nanoen.2022.107879

Cited by 40 publications

(18 citation statements)

References 48 publications

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“…Ultrasound and the usual acoustic wave propagation in the medium is a linear motion. The speed of motion is related to the medium, and all kinds of sound transmission mediums have a fixed acoustic impedance rate [8] , [34] . As the resistance of iron and oil, water is very different, therefore when the ultrasonic wave travels to the interface of the two media with a large difference in acoustic impedance, the main reflection occurs, the reflection of the ultrasonic wave back and forward in the synthesis of the ultrasonic wave, when each point of the phase difference remains stable, resonance occurs, and in some fixed positions superimposed on each other to strengthen the medium in these positions easy to produce cavities.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of nano-β-CD@Fe3O4 magnetic material and its application in ultrasonic treatment of oily sludge

Song

Weiru

et al. 2023

Ultrasonics Sonochemistry

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Section: Resultsmentioning

confidence: 99%

Synthesis of nano-β-CD@Fe3O4 magnetic material and its application in ultrasonic treatment of oily sludge

Song

Weiru

et al. 2023

Ultrasonics Sonochemistry

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“…The distance from point C to B3 is denoted as L, and the radius of the Earth, denoted as R, is 6378137 m, as shown in Figure 6. The angle can be expressed as Equation (14). When the measuring equipment is horizontally pointed at the target ship, there is an elevation difference, d1, relative to point B3 in Figure 6, which can be expressed as Equation (15).…”

Section: Cone Angle Intersection Data Processing Methods a Analysis O...mentioning

confidence: 99%

“…Target localization methods include laser ranging [1], photography [2], sonar [3]- [5], and radar [6]- [13], etc. The laser ranging method determines the shell fall location using a rangefinder on the ship, while the photographic method captures images of the shells' trajectory and fall point with a high-speed camera for analysis.The sonar method detects acoustic signals generated when shells fall into water using sonar equipment installed in underwater equipment, enabling determination of the strike position and off-target volume information [14], [15]. This method is suitable for underwater measurements, but high noise levels may affect measurement accuracy.…”

Section: Introductionmentioning

confidence: 99%

Sea Fall Point Measurement Method Based on Cone Angle Intersection

Wang

et al. 2023

IEEE Access

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The naval gun strikes against the sea need to measure the deviation of the fall point to determine the accuracy and hit probability. In order to improve the accuracy of measuring the fall point position of the naval gun, this paper proposes a maritime fall point measurement method based on cone angle intersection, which does not need to use the axis angle data of the equipment and eliminates the dependence on the equipment's axis angle data when measuring accuracy. Firstly, the photographic measurement method is used to achieve automatic optical intersection of single equipment at different moments, using two observation stations and one cooperative target ship. Then, the image data within 10 km from the measured target are collected using two observation stations. The line of sight directions and angles of the two observation stations are combined to measure the target object and the cooperative target ship at each observation station. The constraint of the approximate equal radius of the Earth ellipsoid is added under close range conditions. The cone angle intersection model mapping relationship is established. Finally, the coordinate position of the target object in three-dimensional space is calculated using field tests at sea and compared with the actual position for analysis.The experimental results show that the measured fall point is within 5 m in the range of 700 m with a ratio of more than 75%. This has increased the range of measurement accuracy processing and proved the feasibility of the measurement method. The method can be used for calibrating large and medium caliber naval gun firing to the sea to improve the firing accuracy of the weapon. It has guiding significance for measuring the fall point position of naval guns at sea.INDEX TERMS maritime fall point measurement, cone angle intersection, photographic measurement, optical intersection.

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“…The related research works are classified into the three major application directions, which include the ocean energy harvesting, self‐powered ocean monitoring, and self‐powered marine electrochemical technologies, by the relative application area ( Figure 1 ). [ 47–67 ] In order to better summarize the research content and the latest progress of the three major research directions, we have also carried out a more detailed classification introduction to the three major research directions. Importantly, the viewing outlooks and challenges of TENGs major application directions in the marine exploitation are proposed, respectively.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent Advances in Triboelectric Nanogenerators for Marine Exploitation

Zhang

Hao

Yang

et al. 2023

Advanced Energy Materials

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The ocean, as one of the most important areas for human production and living, plays a vital role in transportation, food production, and energy supply. However, it is greatly desired to develop relevant advanced technologies to achieve efficient and safe ocean exploitation and utilization. The advanced triboelectric nanogenerator (TENG), which can transform mechanical motion into electric energy to achieve the harvesting of related mechanical energy and obtain corresponding mechanical motion characteristics by the corresponding electronic signal, is a significant choice to develop the corresponding advanced technologies for marine exploitation. According to the application field, TENG based marine exploitation researches can be divided into three kinds of researching directions, which contain the in situ ocean energy harvesting, self‐powered ocean monitoring, and self‐powered marine electrochemical technologies. The latest representative research works, which are based on TENG technology for marine exploitation, are classified in detail and summarized comprehensively in this review. More importantly, the specific prospects of TENG in the marine exploitation are discussed in detail to promote future research.

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A self-powered acoustic sensor excited by ultrasonic wave for detecting and locating underwater ultrasonic sources

Cited by 40 publications

References 48 publications

Synthesis of nano-β-CD@Fe3O4 magnetic material and its application in ultrasonic treatment of oily sludge

Synthesis of nano-β-CD@Fe3O4 magnetic material and its application in ultrasonic treatment of oily sludge

Sea Fall Point Measurement Method Based on Cone Angle Intersection

Recent Advances in Triboelectric Nanogenerators for Marine Exploitation

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