Improvement of pulse diagnostic apparatus with array sensor of magnetic tunneling junctions

Kim, S. W.; Hwang, Dosam; Choi, Yukyoung; Lee, H. S.; Park, D. H.; Lee, S. S.; Kim, G. W.; Lee, S. G.; Lee, S. J.

doi:10.1063/1.2177388

Cited by 11 publications

(6 citation statements)

References 3 publications

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“…Firstly, the magnetic field distributions for the static permanent magnets array using the finite element method (FEM) and for the moving permanent magnet array in a sensing surface were simulated [4].…”

Section: Methodsmentioning

confidence: 99%

Development of spatial pulse diagnostic apparatus with magnetic sensor array

Choi

Kim

et al. 2007

Journal of Magnetism and Magnetic Materials

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Section: Methodsmentioning

confidence: 99%

Development of spatial pulse diagnostic apparatus with magnetic sensor array

Choi

Kim

et al. 2007

Journal of Magnetism and Magnetic Materials

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“…Jeon et al [ 11 ] describe a seven-channel pressure sensor array for measuring pulse width. Similarly, Chung et al [ 12 ], Choi et al [ 13 ], and Kim et al [ 14 ] use a two-dimensional pressure sensor array to extract spatial pulse features. Hu et al [ 15 ] present a sensor probe consisting of a capacitive array sensor with 12 sensing points to determine the optimal pulse-taking position.…”

Section: Introductionmentioning

confidence: 99%

Pulse wave response characteristics for thickness and hardness of the cover layer in pulse sensors to measure radial artery pulse

et al. 2018

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BackgroundPiezo-resistive pressure sensors are widely used for measuring pulse waves of the radial artery. Pulse sensors are generally fabricated with a cover layer because pressure sensors without a cover layer are fragile when they come into direct contact with the skin near the radial artery. However, no study has evaluated the dynamic pulse wave response of pulse sensors depending on the thickness and hardness of the cover layer. This study analyzed the dynamic pulse wave response according to the thickness and hardness of the cover layer and suggests an appropriate thickness and hardness for the design of pulse sensors with semiconductor device-based pressure sensors.MethodsPulse sensors with 6 different cover layers with various thicknesses (0.8 mm, 1 mm, 2 mm) and hardnesses (Shore type A; 30, 43, 49, 71) were fabricated. Experiments for evaluating the dynamic pulse responses of the fabricated sensors were performed using a pulse simulator to transmit the same pulse wave to each of the sensors. To evaluate the dynamic responses of the fabricated pulse sensors, experiments with the pulse sensors were conducted using a simulator that artificially generated a constant pulse wave. The pulse wave simulator consisted of a motorized cam device that generated the artificial radial pulse waveform by adjusting the stroke of the cylindrical air pump and an air tube that conveyed the pulse to the artificial wrist.ResultsThe amplitude of the measured pulse pressure decreased with increasing thickness and hardness of the cover layer. Normalized waveform analysis showed that the thickness rather than the hardness of the cover layer contributed more to waveform distortion. Analysis of the channel distribution of the pulse sensor with respect to the applied constant dynamic pressure showed that the material of the cover layer had a large effect.ConclusionsIn this study, in-line array pulse sensors with various cover layers were fabricated, the dynamic pulse wave responses according to the thickness and the hardness of the cover layer were analyzed, and an appropriate thickness and hardness for the cover layer were suggested. The dynamic pulse wave responses of pulse sensors revealed in this study will contribute to the fabrication of improved pulse sensors and pulse wave analyses.

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“…Therefore, sensor research has shifted a single sensor to an array sensor or multiple combined sensors to obtain more information about wrist pulse signals [ 8 – 14 ]. Strain gauge, piezoresistor, and polyvinylidene fluoride (PVDF) are common choices for obtaining wrist pulse signals.…”

Section: Introductionmentioning

confidence: 99%

Temporal and Spatial Properties of Arterial Pulsation Measurement Using Pressure Sensor Array

Chung

Yeh

et al. 2012

Evidence-Based Complementary and Alternative Medicine

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Conventionally, a pulse taking platform is based on a single sensor, which initiates a feasible method of quantitative pulse diagnosis. The aim of this paper is to implement a pulse taking platform with a tactile array sensor. Three-dimensional wrist pulse signals are constructed, and the length, width, ascending slope, and descending slope are defined following the surface of the wrist pulse. And the pressure waveform of the wrist pulse obtained through proposed pulse-taking platform has the same performance as the single sensor. Finally, the results of a paired samples t-test reveal that the repeatability of the proposal platform is consistent with clinical experience. On the other hand, the results of ANOVA indicate that differences exist among different pulse taking depths, and this result is consistent with clinical experience in traditional Chinese medicine pulse diagnosis (TCMPD). Hence, the proposed pulse taking platform with an array sensor is feasible for quantification in TCMPD.

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Improvement of pulse diagnostic apparatus with array sensor of magnetic tunneling junctions

Cited by 11 publications

References 3 publications

Development of spatial pulse diagnostic apparatus with magnetic sensor array

Development of spatial pulse diagnostic apparatus with magnetic sensor array

Pulse wave response characteristics for thickness and hardness of the cover layer in pulse sensors to measure radial artery pulse

Temporal and Spatial Properties of Arterial Pulsation Measurement Using Pressure Sensor Array

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