Fabrication and Characterization of High-Sensitivity Underwater Acoustic Multimedia Communication Devices with Thick Composite PZT Films

Liu, Jeng-Cheng; Cheng, Yuang-Tung; Ho, Sheng-Yun; Hung, H. M. James; Chang, Shun-Hsyung

doi:10.1155/2017/7326919

Cited by 8 publications

(11 citation statements)

References 16 publications

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“…A novel approach using HHT is proposed for joint bearing and range estimation of multiple targets based on a uniform linear array of hydrophones. In the past, a MEMS based acoustic linear uniform array of hydrophones for underwater application was proposed by our research team [ 17 , 23 ]. The micro hydrophone array has a very compact size, suitable for AUV operations.…”

Section: Discussionmentioning

confidence: 99%

“…In order to find out the resonant frequency and sensitivity of the fabricated hydrophone, it is immersed into a water tank and connected to a signal generator. The underwater experimental setup [ 17 , 22 ] to measure the characteristics of the fabricated hydrophone is shown in Figure 6 . A calibrated hydrophone (B & K 8103) was employed.…”

Section: Experimental Approachmentioning

confidence: 99%

“…Therefore, a recent trend has focused on the development of small-size sensors with high sensitivity via micro-electro-mechanical systems (MEMS) technology [ 16 ]. In the past, a MEMS-based acoustic linear uniform array of hydrophones for underwater applications was proposed by our research team [ 17 ]. Motivated by our previous work, we developed a novel HHT-based method for joint bearing and range estimation of multiple targets in this paper.…”

Section: Introductionmentioning

confidence: 99%

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Joint Bearing and Range Estimation of Multiple Objects from Time-Frequency Analysis

Liu

Cheng

Hung

2018

Sensors

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Direction-of-arrival (DOA) and range estimation is an important issue of sonar signal processing. In this paper, a novel approach using Hilbert-Huang transform (HHT) is proposed for joint bearing and range estimation of multiple targets based on a uniform linear array (ULA) of hydrophones. The structure of this ULA based on micro-electro-mechanical systems (MEMS) technology, and thus has attractive features of small size, high sensitivity and low cost, and is suitable for Autonomous Underwater Vehicle (AUV) operations. This proposed target localization method has the following advantages: only a single snapshot of data is needed and real-time processing is feasible. The proposed algorithm transforms a very complicated nonlinear estimation problem to a simple nearly linear one via time-frequency distribution (TFD) theory and is verified with HHT. Theoretical discussions of resolution issue are also provided to facilitate the design of a MEMS sensor with high sensitivity. Simulation results are shown to verify the effectiveness of the proposed method.

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Section: Discussionmentioning

confidence: 99%

Section: Experimental Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Joint Bearing and Range Estimation of Multiple Objects from Time-Frequency Analysis

Liu

Cheng

Hung

2018

Sensors

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“…The first use of piezoelectric material in underwater acoustic applications was reported in 1917 by a French physicist Paul Langevin, wherein quartz was used as the piezoelectric material in developing an underwater acoustic transducer useful in submarines detection. Since then, there has been extensive research in the field [4,5].…”

Section: Research Overview In Sensor Development Low-frequency Detectmentioning

confidence: 99%

Manifestations of Nanomaterials in Development of Advanced Sensors for Defense Applications

Kitture¹,

Kale²

2019

Handbook of Advanced Ceramics and Composites

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In recent times, the global science and technology is dominated by research in the nanotechnology domain, especially to explore novel materials with exotic properties, which are attributed to their nano-size regimes. Typically explored examples are metals (gold, silver, copper, etc.), organic and inorganic materials (metal oxides, polymers), carbon (graphene, CNTs, etc.), and so on, typically, in their pure and composites forms. The polymers are playing a vital role in this domain, to make the polymer-based nanocomposites, which are used for different

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“…With the development of MEMS technology, the new MEMS hydrophones with the advantages of miniaturization, integration and mass production have been proposed, which are very suitable for the small-size underwater vehicle [5,6]. A kind of MEMS vector hydrophone with cilium-four-beam microstructure was proposed by Zhang [7], which has a good sensitivity at low-frequency.…”

Section: Introductionmentioning

confidence: 99%

Array MEMS Vector Hydrophone Oriented at Different Direction Angles

Liu

Nie

et al. 2019

Sensors

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A new type of array MEMS (Microelectro Mechanical Systems) vector hydrophone has been proposed to solve the left-right ambiguity problem that is commonly found in current ones. Meanwhile, the advantages of good sensitivity and low fabrication cost are maintained. The array MEMS vector hydrophone is integrated by four units oriented at different direction angles. By the aid of this kind of vector hydrophone, not only the exact direction of the sound source can be measured, but also the position obtained. The working principle of the array microstructure has been analyzed and simulated. The result shows that the position of the sound source can be well determined. The prototype of the hydrophone is fabricated based on standard MEMS technology, and its performance is tested in a standing wave tube and an anechoic tank. The testing results show that the array hydrophone exhibits a good consistency of all the four units and satisfactory performance. More importantly, this array hydrophone exhibits excellent ability of positioning with the relatively small angle error. Thus, a MEMS hydrophone with multiple functions and relatively high performance is realized, which has important theoretical and practical significance in relevant applications such as the small-size underwater vehicles.

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Fabrication and Characterization of High-Sensitivity Underwater Acoustic Multimedia Communication Devices with Thick Composite PZT Films

Cited by 8 publications

References 16 publications

Joint Bearing and Range Estimation of Multiple Objects from Time-Frequency Analysis

Joint Bearing and Range Estimation of Multiple Objects from Time-Frequency Analysis

Manifestations of Nanomaterials in Development of Advanced Sensors for Defense Applications

Array MEMS Vector Hydrophone Oriented at Different Direction Angles

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