Development of a piezoelectric polyvinylidene fluoride (PVDF) polymer-based sensor patch for simultaneous heartbeat and respiration monitoring

Chiu, Yi-Yuan; Lin, Wan-Ying; Wang, Hsin-Yao; Huang, Shu-Wei; Wu, Min‐Hsien

doi:10.1016/j.sna.2012.10.021

Cited by 160 publications

(99 citation statements)

References 16 publications

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“…For such device, optimal solution is to use sensors manufactured from polarized polyvinylidene fluoride (PVDF) foil (Sessler, 1972;Chiu et al, 2013), wireless transfer of measured data and software compatible with popular spreadsheets. In accord to the available data (Sokołowska and Krakowiak, 2007), flat feet was found in 43 per cent of child population in Poland.…”

Section: Introductionmentioning

confidence: 99%

Electronic measurement system of foot plantar pressure

Klimiec

Piekarski

Zaraska

et al. 2014

Microelectronics International

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Purpose -This paper aims to present a prototype of the diagnostic system for the examination of the distribution of the force applied by foot to substrate during usual human moving. Presented system is competitive to other currently available devices, thanks to sensors reliability, user-friendly operation manner and design based on cheap parts. The results of examinations are transmitted by radiomodem. Its recording and visualization are possible on either personal or mobile computers. Design/methodology/approach -During selection of the sensors substrate, many polymeric electrets were examined. Polyvinylidene fluoride films were selected, because they have good charge uniformity across the surface, wide range of acceptable temperatures, linear relation between mechanical stress and output signal and high resistance for squeezing. The system measures the charge generated in film. Findings -The pressures are recorded in relation to maximum value; therefore, measuring system does not require calibration. The simultaneous recording of data from all eight sensors allows tracking the signal without distortion. Originality/value -An array of sensors is installed in the shoe insole. The measuring device is fixed to the outer surface of the shoe. Its weight is 75 g. The range of transmission is suitable for examination in the natural environment, outside traditional consulting room. Software is dedicated for analysis of the pressure distribution in every moment of the foot movement. The system is suitable for examination of flat feet, diabetic foot and recovery progress after injures.

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Section: Introductionmentioning

confidence: 99%

Electronic measurement system of foot plantar pressure

Klimiec

Piekarski

Zaraska

et al. 2014

Microelectronics International

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“…PVDF, when crystallized in its β-phase, exhibits piezoelectric properties because of which mechanical energy can be converted to electrical energy and vice versa. Therefore, PVDF has been used to manufacture sensors and actuators that can be utilized in various practical applications including shock impact and pressure sensors, (8,9) biomedical sensors, (10,11) acoustic sensors, (12,13) tactile sensors, (14) active vibration control, (15) and structural health monitoring of civil and aerospace structures. (16,17) Sirohi and Chopra (18) demonstrated the superior signalto-noise ratio of PVDF sensors compared to conventional foil gauges for dynamic strain sensing.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Impact Force Identification Using Output Response of PVDF Sensor

2018

Sensors and Materials

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Impact force identification from structural dynamic responses at certain points on a mechanical structure subjected to impact is a classical inverse problem in dynamics. There has been a growing demand for an efficient inverse algorithm and/or sensors that can overcome the ill-conditioning problem often encountered in an inverse analysis. This study investigates the capabilities of a polyvinylidene fluoride (PVDF) sensor to identify impact force. Impact force was identified from the response of a PVDF sensor attached to a steel cantilever beam. A simple method involving neither the analytical nor the experimental Green's function was used to create the objective function that was minimized during the optimization process. Results of parametric studies on the effect of PVDF output length included in the process of optimizing the objective function suggest that identification accuracy appears to be more vulnerable to peak differences than to area differences. Output lengths of 50 and 100 ms appear to yield good identification accuracy for both peak-and area-based evaluations. Furthermore, accuracy of identification seems to be susceptible to variations in the starting time of impact history. However, such susceptibility was overcome by the PVDF sensor's excellent signal-to-noise ratio, thanks to which the starting point of an impact's history can be accurately identified.

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“…Such pressure sensors have typically been prepared by integrating functional materials such as piezoresistive, piezoelectric and piezocapacitive in film to textile substrates rather than by developing intelligent fiber itself [3].…”

Section: Introductionmentioning

confidence: 99%