Bending mode ionic polymer-metal composite (IPMC) pressure sensors

Gudarzi, Mohammad; Smolinski, Patrick; Wang, Qing-Ming

doi:10.1016/j.measurement.2017.02.029

Cited by 31 publications

(30 citation statements)

References 31 publications

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“…Sensing with IPMCs can be realized by several means i.e. measuring voltage [36], [37], [38], [39], [40], current [37], [19], [41], [31], [25], [42], [43], charge [37], [44], [29], [45], [46], and the impedance change [47], [48].…”

Section: Introductionmentioning

confidence: 99%

Active Sensing Methods of Ionic Polymer Metal Composite (IPMC): Comparative Study in Frequency Domain

MohdIsa

Hunt

HosseinNia

2019

2019 2nd IEEE International Conference on Soft Robotics (RoboSoft)

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Active sensing methods of ionic polymer metal composite (IPMC) Abstract-Ionic polymer-metal composites (IPMCs) are soft transducers that bend in response to low-voltage input, and generate voltage in response to deformations. Their potential applications include compliant locomotion systems, small-scale robotics, energy harvesting and biomedical instrumentation. The materials are inherently compliant, simple to shape, simple to miniaturize and simple to integrate into a system. Compared to actuation, IPMC sensing has not been intensively studied. The existing reports focus on the sensing phenomenon, but provide insufficient characterization for implementation purposes. This work aims to address this gap by studying and comparing the frequency responses and noise dynamics of different IPMC active sensing signals, i.e. voltage, charge and current. These characteristics are experimentally identified by mechanically exciting IPMC samples, and simultaneously measuring the respective signals and material deformations. The results provide a systematic comparison between different implementations of active sensing with IPMCs, and give insights into their strengths and limitations.

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Section: Introductionmentioning

confidence: 99%

Active Sensing Methods of Ionic Polymer Metal Composite (IPMC): Comparative Study in Frequency Domain

MohdIsa

Hunt

HosseinNia

2019

2019 2nd IEEE International Conference on Soft Robotics (RoboSoft)

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“…Liqun et al (2014) measured IPMC charge for force sensing purpose, and reportedly achieved 0.065 mN resolution [137]. In 2017, Gudarzi et al studied using IPMCs for dynamic pressure sensing in a shock tube set-up [26,27]. IPMC membrane showed 1000 times higher sensitivity than the commercial piezoelectric sensor used for calibration, and it was argued to be due to larger membrane area and higher sensitivity of the IPMCs [26].…”

Section: Active Sensing Methodsmentioning

confidence: 99%

“…In 2017, Gudarzi et al studied using IPMCs for dynamic pressure sensing in a shock tube set-up [26,27]. IPMC membrane showed 1000 times higher sensitivity than the commercial piezoelectric sensor used for calibration, and it was argued to be due to larger membrane area and higher sensitivity of the IPMCs [26]. In compression and shear stress measurements, IPMC was reported to exhibit respectively 800 and 1300 times higher sensitivities than a commercial sensor [27].…”

Section: Active Sensing Methodsmentioning

confidence: 99%

“…Charge that is displaced by an IPMC is roughly proportional to the bending deformation [85,87,100,125] or the pressure [26] applied on the material sample. Shorter and wider IPMC samples yield higher sensitivities [125], and reported charge sensitivities to bending deformations remain in sub-μC/mm range.…”

Section: Active Sensing Methodsmentioning

confidence: 99%

“…IPMCs can replace bulky vision systems [14,15], laser displacement sensors [16,17], load cells [18,19] and inductive sensors [20] from actuation systems of smart materials. Proposed IPMC sensing applications include sensing of vibrations [21], seismic waves [22], position in multiple degrees of freedom [23], bio-acoustic waves [24], force [25], pressure [26,27], tactile interactions [28] and flow [29].…”

Section: Introductionmentioning

confidence: 99%

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Sensing and Self-Sensing Actuation Methods for Ionic Polymer–Metal Composite (IPMC): A Review

MohdIsa

Hunt

HosseinNia

2019

Sensors

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Ionic polymer–metal composites (IPMC) are smart material transducers that bend in response to low-voltage stimuli and generate voltage in response to bending. IPMCs are mechanically compliant, simple in construction, and easy to cut into desired shape. This allows the designing of novel sensing and actuation systems, e.g., for soft and bio-inspired robotics. IPMC sensing can be implemented in multiple ways, resulting in significantly different sensing characteristics. This paper will review the methods and research efforts to use IPMCs as deformation sensors. We will address efforts to model the IPMC sensing phenomenon, and implementation and characteristics of different IPMC sensing methods. Proposed sensing methods are divided into active sensing, passive sensing, and self-sensing actuation (SSA), whereas the active sensing methods measure one of IPMC-generated voltage, charge, or current; passive methods measure variations in IPMC impedances, or use it in capacitive sensor element circuit, and SSA methods implement simultaneous sensing and actuation on the same IPMC sample. Frequency ranges for reliable sensing vary among the methods, and no single method has been demonstrated to be effective for sensing in the full spectrum of IPMC actuation capabilities, i.e., from DC to ∼100 Hz. However, this limitation can be overcome by combining several sensing methods.

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Piezoionics: Mechanical‐to‐ionic transduction for sensing, biointerface, and energy harvesting

Chen,

2023

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Piezoionic materials consisting of a polymer matrix and mobile ions can produce an electrical output upon an applied pressure inducing an ion concentration gradient. Distinct from charges generated by the piezoelectric or triboelectric effects, the use of generated mobile ions to carry a signal closely resembles many ionic biological processes. Due to this similarity to biology, the piezoionic effect has great potential to enable seamless integration with biological systems, which accelerates the advancement of medical devices and personalized medicine. In this review, a comprehensive description of the piezoionic mechanism, methods, and applications are presented, with the aim to facilitate a dialogue among relevant scientific communities. First, the piezoionic effect is briefly introduced, then the development of mechanistic understanding over time is surveyed. Next, different types of piezoionic materials are reviewed and methods to enhance the piezoionic output via materials properties, electrode interfaces, and device architectures are detailed. Finally, applications, challenges, and outlooks are provided. With its novel properties, piezoionics is expected to play a key role in the overcoming of grand challenges in the areas of sensing, biointerfaces, and energy harvesting.

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Bending mode ionic polymer-metal composite (IPMC) pressure sensors

Cited by 31 publications

References 31 publications

Active Sensing Methods of Ionic Polymer Metal Composite (IPMC): Comparative Study in Frequency Domain

Active Sensing Methods of Ionic Polymer Metal Composite (IPMC): Comparative Study in Frequency Domain

Sensing and Self-Sensing Actuation Methods for Ionic Polymer–Metal Composite (IPMC): A Review

Piezoionics: Mechanical‐to‐ionic transduction for sensing, biointerface, and energy harvesting

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