Design of a Novel Medical Acoustic Sensor Based on MEMS Bionic Fish Ear Structure

Zhou, Chenzheng; Zang, Junbin; Chen, Xue; Ma, Yuexuan; Hua, Xiaoqiang; Gao, Rui; Zhang, Zengxing; Li, Bo; Zhang, Zhidong

doi:10.3390/mi13020163

Cited by 14 publications

(6 citation statements)

References 31 publications

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“…In our study, the results show a good correlation between the S2A or S2E and the BP. Despite previous research proposing the determination of BP by heart sound analysis, BP estimation from the heart sound has only achieved progress in recent years [ 14 , 18 , 19 ]. Early studies suggest that a unique noninvasive BP measurement and a small range of BP variations may induce bias [ 16 ].…”

Section: Discussionmentioning

confidence: 99%

Assessing Hemorrhagic Shock Severity Using the Second Heart Sound Determined from Phonocardiogram: A Novel Approach

Chen

Hou

et al. 2022

Micromachines

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Introduction: Hemorrhagic shock (HS) is a severe medical emergency. Early diagnosis of HS is important for clinical treatment. In this paper, we report a flexible material-based heart sound monitoring device which can evaluate the degree of HS through a phonocardiogram (PCG) change. Methods: Progressive hemorrhage treatments (H1, H2, and H3 stage) were used in swine to build animal models. The PCG sensor was mounted on the chest of the swine. Routine monitoring was used at the same time. Results: This study showed that arterial blood pressure decreased significantly from the H1 phase, while second heart sound amplitude (S2A) and energy (S2E) decreased significantly from the H2 phase. Both S2A and S2E correlated well with BP (p < 0.001). The heart rate, pulse pressure variation and serum hemoglobin level significantly changed in the H3 stage (p < 0.05). Discussion: The change of second heart sound (S2) was at the H2 stage and was earlier than routine monitoring methods. Therefore, PCG change may be a new indicator for the early detection of HS severity.

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Section: Discussionmentioning

confidence: 99%

Assessing Hemorrhagic Shock Severity Using the Second Heart Sound Determined from Phonocardiogram: A Novel Approach

Chen

Hou

et al. 2022

Micromachines

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“…[23] Zhou et al proposed a new bionic acoustic sensor according to the fish ear structure. [24] They started to combined the acoustic and bionic. In this research, we reported an acoustic sensor array packaged into 3D printed ear (3DPE), which is based on piezoelectric PVDF-TrFE to identify the sound frequency and determine the location of the sound source.…”

Section: Doi: 101002/mabi202200374mentioning

confidence: 99%

3D‐Printed Bionic Ear for Sound Identification and Localization Based on In Situ Polling of PVDF‐TrFE Film

Yang

Xiang

Liao

et al. 2022

Macromolecular Bioscience

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Bionic acoustic sensors are an indispensable part to realize interactions between humans and robotics. In this work, a PVDF-TrFE sensor array with multiple active pixels combined with a 3D-printed bionic ear model is prepared, which can accurately detect sounds with different frequencies and locate the sound source from different directions. The PVDF-TrFE sensor array can clearly identify the sound within 25 cm, and the error between the accepted sound frequency and the original input frequency is less than 0.001%. Through the algorithm analysis of the input signal, the location of the sound source can be immediately analyzed. Compared with other acoustic sensors, this sensor has the advantages of being self-powered, small size, and high flexibility, which holds great potential for bionic applications.

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“…Microelectromechanical system (MEMS)-based piezoresistive pressure sensors have wide applications in industrial construction [ 1 , 2 , 3 , 4 ], healthcare monitoring [ 5 , 6 , 7 , 8 , 9 , 10 , 11 ], and ocean depth detection due to their high process maturity, easy sensor integration, and easy signal processing [ 12 , 13 ]. However, systematic research of the sensor performance in harsh environments is lacking, although many studies have been reported on the design and manufacturing of such piezoresistive pressure sensors.…”

Section: Introductionmentioning

confidence: 99%

Design, Fabrication, and Dynamic Environmental Test of a Piezoresistive Pressure Sensor

et al. 2022

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Microelectromechanical system (MEMS) pressure sensors have a wide range of applications based on the advantages of mature technology and easy integration. Among them, piezoresistive sensors have attracted great attention with the advantage of simple back-end processing circuits. However, less research has been reported on the performance of piezoresistive pressure sensors in dynamic environments, especially considering the vibrations and shocks frequently encountered during the application of the sensors. To address these issues, this paper proposes a design method for a MEMS piezoresistive pressure sensor, and the fabricated sensor is evaluated in a series of systematic dynamic environmental adaptability tests. After testing, the output sensitivity of the sensor chip was 9.21 mV∙bar−1, while the nonlinearity was 0.069% FSS. The sensor overreacts to rapidly changing pressure environments and can withstand acceleration shocks of up to 20× g. In addition, the sensor is capable of providing normal output over the vibration frequency range of 0–5000 Hz with a temperature coefficient sensitivity of −0.30% FSS °C−1 over the temperature range of 0–80 °C. Our proposed sensor can play a key role in applications with wide pressure ranges, high-frequency vibrations, and high acceleration shocks, as well as guide MEMS-based pressure sensors in high pressure ranges and complex environmental adaptability in their design.

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Design of a Novel Medical Acoustic Sensor Based on MEMS Bionic Fish Ear Structure

Cited by 14 publications

References 31 publications

Assessing Hemorrhagic Shock Severity Using the Second Heart Sound Determined from Phonocardiogram: A Novel Approach

Assessing Hemorrhagic Shock Severity Using the Second Heart Sound Determined from Phonocardiogram: A Novel Approach

3D‐Printed Bionic Ear for Sound Identification and Localization Based on In Situ Polling of PVDF‐TrFE Film

Design, Fabrication, and Dynamic Environmental Test of a Piezoresistive Pressure Sensor

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