Recent Progress in Flexible Microstructural Pressure Sensors toward Human–Machine Interaction and Healthcare Applications

He, Fan; You, Xingyan; Wang, Weiguo; Bai, Tian; Xue, Gaofei; Ye, Meidan

doi:10.1002/smtd.202001041

Cited by 115 publications

(82 citation statements)

References 144 publications

(168 reference statements)

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“…Pressure sensors are transducers that can acquire tactile information and transform it into electrical signals and have shown enormous potential in the fields of e-skins, [110][111][112][113][114] intelligent robotics, [115][116][117][118] human-machine interactions, [39,111,116,[118][119][120][121][122] and biomedical devices. [2,39,72,[123][124][125] Portable energy-storage devices, such as batteries, appear to be an intuitive choice for a universal energy solution.…”

Section: Pulse Pressure Sensing Mechanismmentioning

confidence: 99%

Wearable Pressure Sensors for Pulse Wave Monitoring

et al. 2022

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Furthermore, by 2030 this number is expected to rise steadily to 23.6 million. [2] Despite such high mortality rates, most CVD, [3,4] including arteriosclerosis, [5,6] diabetes, [7][8][9][10] myocardial infarction, [11,12] coronary heart disease, [13,14] and hypertension, [15][16][17][18] can be prevented and treated through early diagnosis and long-term monitoring of physiological signaling. Conventional health systems suffer from deficiencies in wearability, wireless technology, lifespan, and stability to maintain a long-term collection of clinical-grade individual health metrics for accurate diagnosis. [19][20][21] As such, promoting the utility of Internet of Things (IoT)-enabled technology in personalized healthcare is still significantly impeded by the need for costeffective and wearing-comfort biomedical devices to continuously provide real-time patient-generated health data. Over the past several decades, significant advances in wearable pressure sensors have been observed, allowing them to noninvasively and continuously detect human physiological and pathological signals. [22][23][24][25][26][27][28][29][30][31][32][33][34][35] These biomedical metrics can then be used to evaluate cardiovascular conditions, providing a personalized health care system with better health outcomes, increased user-friendliness, greater quality, and cost-effectiveness that are essential to reducing CVD incidence and mortality. [36][37][38][39] Pulse waves are prominent component of human physiological signaling and involve abundant human-health information that can reveal individual conditions, including heart problems (such as arrhythmia), blood pressure, vascular aging, exercise, medication, and sleep status. [40][41][42][43][44][45] Although physical symptoms are often elusively observed in their early stages, they can be diagnosed through subtle pulsewave changes. Preventive action of CVDs can be taken by differentiating the variance of pulse waveforms with consideration of participants' age, gender, weight, and daily diet. [46][47][48][49] Traditional Chinese medicine (TCM) has proposed empirical approaches to analyze human physical state from pulse waves, rendering pulse wave surveillance unavoidable for TCM. [50,51] TCM is unable to continuously monitor pulse waves, limiting the accuracy of the assessment results. As such, empirical diagnostic methods may profoundly depend on the experiences of the practitioner, the emotions of the participant, and the external environment, resulting in the administration of distorted or problematic treatment. [52] Additionally, the diagnostic results among practitioners are Cardiovascular diseases remain the leading cause of death worldwide. The rapid development of flexible sensing technologies and wearable pressure sensors have attracted keen research interest and have been widely used for longterm and real-time cardiovascular status monitoring. Owing to compelling characteristics, including light weight, wearing comfort, and high sensitivity to pulse pressures, physiological pulse ...

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Section: Pulse Pressure Sensing Mechanismmentioning

confidence: 99%

Wearable Pressure Sensors for Pulse Wave Monitoring

et al. 2022

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“…[14,15] Among them, resistive-type pressure sensors are of interesting due to their ability in both dynamic and static force detection, simple device structure, and easy signal processing. [5,7,16] Two strategies are widely used to develop the flexible resistive-type pressure sensor: 1) using microstructured interfaces between the sensing layer and electrode layer increase the contact resistance changes to applied pressure; [17][18][19][20][21][22] 2) introducing the porous structure with 3D conductive networks in sensing layer, to enhance pressure response of bulk resistance. [23][24][25][26][27] The former method could realize the pressure www.advmattechnol.de…”

Section: Introductionmentioning

confidence: 99%

Deep Eutectic Solvent Induced Porous Conductive Composite for Fully Printed Piezoresistive Pressure Sensor

Wang

Sekine

Takeda

et al. 2021

Adv Materials Technologies

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Manufacturing flexible pressure sensor using scalable and straightforward process is highly desired for next‐generation wearable electronics and intelligent robots. Here, a fully printed pressure sensor is proposed using a newly developed porous conductive composite. The composite ink is prepared by simply mixing the polydimethylsiloxane (PDMS), carbon black (CB), and a deep eutectic solvent (DES). The DES induces phase segregation between the PDMS and CB and serves as a liquid template to form the porous structure during the annealing process. This spontaneously formed conductive architecture that has not been previously reported in a printable ink endows superior electrical–mechanical performance to the composites, and significantly simplifies the device fabrication of flexible pressure sensors. The developed pressure sensors exhibit comprehensive performance capabilities appropriate for the wearable device, human–machine interfaces, and robot tactile.

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“…Flexible and wearable electronic devices with various functionality and suitability for the human body have recently attracted considerable research interest with the rapid growth of artificial intelligence [1][2][3]. Flexible sensors, as a key element of wearable devices [4][5][6], have become one of the research hotspots due to their various promising applications [7,8], such as in human−machine interfaces, electronic skin, timely health monitoring, and soft robotics [9].…”

Section: Introductionmentioning

confidence: 99%

All-Fabric-Based Flexible Capacitive Sensors with Pressure Detection and Non-Contact Instruction Capability

Tian

et al. 2022

Coatings

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The flexible and wearable capacitive sensors have captured tremendous interest due to their enormous potential for healthcare monitoring, soft robotics, and human−computer interface. However, despite recent progress, there are still pressing challenges to develop a fully integrated textile sensor array with good comfort, high sensitivity, multisensing capabilities, and ultra-light detection. Here, we demonstrate a pressure and non-contact bimodal fabric-only capacitive sensor with highly sensitive and ultralight detection. The graphene nanoplatelets-decorated multidimensional honeycomb fabric and nickel-plated woven fabric serve as the dielectric layer and electrode, respectively. Our textile-only capacitive bimodal sensor exhibits an excellent pressure-sensing sensitivity of 0.38 kPa−1, an ultralow detection limit (1.23 Pa), and cycling stability. Moreover, the sensor exhibits superior non-contact detection performance with a detection distance of 15 cm and a maximum relative capacitance change of 10%. The sensor can successfully detect human motion, such as finger bending, saliva swallowing, etc. Furthermore, a 4 × 4 (16 units) textile-only capacitive bimodal sensor array was prepared and has excellent spatial resolution and response performance, showing great potential for the wearable applications.

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Recent Progress in Flexible Microstructural Pressure Sensors toward Human–Machine Interaction and Healthcare Applications

Cited by 115 publications

References 144 publications

Wearable Pressure Sensors for Pulse Wave Monitoring

Wearable Pressure Sensors for Pulse Wave Monitoring

Deep Eutectic Solvent Induced Porous Conductive Composite for Fully Printed Piezoresistive Pressure Sensor

All-Fabric-Based Flexible Capacitive Sensors with Pressure Detection and Non-Contact Instruction Capability

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