High-sensitivity lollipop-shaped cilia sensor for ocean turbulence measurement

Yang, Shasha; Miao, Jinwei; Zhang, Wenjun; Zhang, Guojun; Chen, Xue; Wang, Renxin

doi:10.1016/j.sna.2021.113109

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…Laboratory testing has shown that the system provides accurate heart rate measurements with a margin of error of less than ±5 beats per minute (BPM) compared to standard medical devices [ 15]. In addition, the blood oxygen saturation level is measured with high accuracy, with a difference of less than 2% compared to the measurement [17]. The results show the accuracy and reliability of the structure of the healthcare system.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, health monitoring equipment equipped with PPG and ECG functions have also found applications in: health monitoring and health-respecting management, allowing people to take health measures [17]. These tools, which provide users with information about cardiovascular health, play an important role in promoting health and preventing chronic diseases [18].…”

Section: Literature Reviewmentioning

confidence: 99%

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Health monitoring system using ECG and PPG techniques

Shagun Tyagi,

Harshit Singhal,

Tushar Gupta

et al. 2024

Int. J. Sci. Res. Arch.

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The demand for portable health monitoring systems has grown rapidly in recent years due to the increasing prevalence of chronic diseases and the need for continuous health monitoring. This article introduces the development and implementation of a portable health monitoring system using photo plethysmography (PPG) and electrocardiogram (ECG) technologies. The system integrates the Node MCU ESP8266 microcontroller, AD8232 ECG sensor, and MAX30100 sensor to measure vital signs such as heart rate and blood oxygen saturation level. The proposed system provides a cost-effective and efficient solution for real-time health monitoring, enabling early detection of abnormalities and timely intervention. The feasibility and performance of the system were proven through experimental tests.

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Section: Resultsmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

Health monitoring system using ECG and PPG techniques

Shagun Tyagi,

Harshit Singhal,

Tushar Gupta

et al. 2024

Int. J. Sci. Res. Arch.

View full text Add to dashboard Cite

show abstract

“…In addition, two varistors are placed on the upper side of each cantilever beam. Further, four cantilever beams are distributed in a cross shape, and cantilever beams in the same direction constitute a Wheatstone bridge [22]. Namely, the four cantilever beams are orthogonally placed and form two sets of Wheatstone bridges that sense the turbulent signals in mutually perpendicular directions.…”

Section: Turbulence Sensor Conditioning Circuitmentioning

confidence: 99%

A Hardware System for Synchronous Processing of Multiple Marine Dynamics MEMS Sensors

et al. 2022

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Temperature, depth, conductivity, and turbulence are fundamental parameters of marine dynamics in the field of ocean science. These closely correlated parameters require time-synchronized observations to provide feedback on marine environmental problems, which requires using sensors with synchronized power supply, multi-path data solving, recording, and storage performances. To address this challenge, this work proposes a hardware system capable of synchronously processing temperature, depth, conductivity, and turbulence data on marine dynamics collected by sensors. The proposed system uses constant voltage sources to excite temperature and turbulence sensors, a constant current source to drive a depth sensor, and an alternating current (AC) constant voltage source to drive a conductivity sensor. In addition, the proposed system uses a high-precision analog-digital converter to acquire the direct current (DC) signals from temperature, depth, and turbulence sensors, as well as the AC signals from conductivity sensors. Since the sampling frequency of turbulence sensors is different from that of the other sensors, the proposed system stores the generated data at different storage rates as multiple-files. Further, the proposed hardware system manages these files through a file system (file allocation tab) to reduce the data parsing difficulty. The proposed sensing and hardware logic system is verified and compared with the standard conductivity-temperature-depth measurement system in the National Center of Ocean Standards and Metrology. The results indicate that the proposed system achieved National Verification Level II Standard. In addition, the proposed system has a temperature indication error smaller than 0.02 °C, a conductivity error less than 0.073 mS/cm, and a pressure error lower than 0.8‰ FS. The turbulence sensor shows good response and consistency. Therefore, for observation methods based on a single point, single line, and single profile, it is necessary to study multi-parameter data synchronous acquisition and processing in the time and spatial domains to collect fundamental physical quantities of temperature, salt, depth, and turbulence. The four basic physical parameters collected by the proposed system are beneficial to the in-depth research on physical ocean motion, heat transfer, energy transfer, mass transfer, and heat-energy-mass coupling and can help to realize accurate simulation, inversion, and prediction of ocean phenomena.

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