Vectorial strain gauge method using single flexible orthogonal polydimethylsiloxane gratings

Guo, Hao; Tang, Jun; Qian, Kun; Tsoukalas, D.; Zhao, Miaomiao; Yang, Jiangtao; Zhang, Binzhen; Chou, Xiujian; Liu, Jun; Chen, Xue; Zhang, Wendong

doi:10.1038/srep23606

Cited by 22 publications

(19 citation statements)

References 26 publications

(30 reference statements)

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“…The proposed force sensor based on PDMS grating has a larger footprint than [11], and possesses better performance. Also using a PDMS grating, the relative error of strain measurement in [12] is less than 0.6%. In this paper, the average relative error is estimated as 0.59% (0.05N/8.5N, 8.5N is the average force in the test), which is comparable with this key factor in [12].…”

Section: Force Measurementmentioning

confidence: 96%

“…When the sensor is deformed under applied force, the transmission modes in the PDMS waveguide change, so that the force can be derived by measuring the light intensity loss of the waveguide. In addition, Guo et al [12] developed a strain measurement method based on PDMS grating. When the sample is stretched, the strain can be calculated by measuring the position shift of light spot due to the grating diffraction.…”

Section: Introductionmentioning

confidence: 99%

“…The PDMS grating is fabricated using the soft casting method, which is precise and easy to follow. On the basis of previous studies [12], this paper not only introduced the fabrication and force sensing principle of the PDMS grating, but also investigates the property control of the force sensor by adjusting the curing temperature and the mixture ratio of the PDMS. The rest of this paper is organized as follow: Section 2 introduces the property of PDMS and fabrication of PDMS grating.…”

Section: Introductionmentioning

confidence: 99%

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A Force Measurement Method Based on Flexible PDMS Grating

Jin

Yang

et al. 2020

Applied Sciences

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With the rapid development of flexible materials, various high-performance biocompatible flexible sensors have been proposed for specific measurement applications. Among these materials, polydimethylsiloxane (PDMS) is one of the most popular polymers by curing the mixture of pre-polymer (base) and cross-linker (curing agent). In this paper, a force measurement method based on PDMS grating is introduced. The PDMS grating is cast from a commercial master grating, which is precise, low-cost, and easy to follow. The elastic modulus can be controlled by the curing temperature and the mixing ratio. The PDMS grating is tested using a tension testing machine. As the stretching force increases, the grating line-spacing simultaneously increases and the diffraction light spot shifts. By capturing the light spot shift using a camera, the relationship between light spot position and stretching force is established and evaluated. Experimental results show that the linearity (R2) of the proposed method is better than 0.998, adding that the sensitivity is ~0.5–0.7N/mm and the accuracy is up to 0.05N.

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Section: Force Measurementmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Force Measurement Method Based on Flexible PDMS Grating

Jin

Yang

et al. 2020

Applied Sciences

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“…[177][178][179] In contrast to the advanced photonic crystals, they used the simplest type of classical photonic crystals as the diffraction grating to diffract incident light. [177][178][179] In contrast to the advanced photonic crystals, they used the simplest type of classical photonic crystals as the diffraction grating to diffract incident light.…”

Section: Photonic Crystalsmentioning

confidence: 99%

Flexible Multifunctional Sensors for Wearable and Robotic Applications

Xie

Hisano

Zhu

et al. 2019

Adv Materials Technologies

246

172

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This review provides an overview of the current state‐of‐the‐art of the emerging field of flexible multifunctional sensors for wearable and robotic applications. In these application sectors, there is a demand for high sensitivity, accuracy, reproducibility, mechanical flexibility, and low cost. The ability to empower robots and future electronic skin (e‐skin) with high resolution, high sensitivity, and rapid response sensing capabilities is of interest to a broad range of applications including wearable healthcare devices, biomedical prosthesis, and human–machine interacting robots such as service robots for the elderly and electronic skin to provide a range of diagnostic and monitoring capabilities. A range of sensory mechanisms is examined including piezoelectric, pyroelectric, piezoresistive, and there is particular emphasis on hybrid sensors that provide multifunctional sensing capability. As an alternative to the physical sensors described above, optical sensors have the potential to be used as a robot or e‐skin; this includes sensory color changes using photonic crystals, liquid crystals, and mechanochromic effects. Potential future areas of research are discussed and the challenge for these exciting materials is to enhance their integration into wearables and robotic applications.

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“…It is worth mentioning that apart of the cell growth control, the wrinkled morphologies are of essential interest in many other research fields such as the metrology of polymeric thin films, adhesion control, design of diffraction gratings, and stretchable electronics …”

Section: Introductionmentioning

confidence: 99%

Laser‐Assisted Strain Engineering of Thin Elastomer Films to Form Variable Wavy Substrates for Cell Culture

Tomba

Petithory

Pedron

et al. 2019

Small

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Endothelial and epithelial cells usually grow on a curved environment, at the surface of organs, which many techniques have tried to reproduce. Here a simple method is proposed to control curvature of the substrate. Prestrained thin elastomer films are treated by infrared laser irradiation in order to rigidify the surface of the film. Wrinkled morphologies are produced upon stress relaxation for irradiation doses above a critical value. Wrinkle wavelength and depth are controlled by the prestrain, the laser power, and the speed at which the laser scans the film surface. Stretching of elastomer substrates with a “sand clock”‐width profile enables the generation of a stress gradient, which results in patterns of wrinkles with a depth gradient. Thus, different combinations of topography changes on the same substrate can be generated. The wavelength and the depth of the wrinkles, which have the characteristic values within a range of several tens of µm, can be dynamically regulated by the substrate reversible stretching. It is shown that these anisotropic features are efficient substrates to control polarization of cell shapes and orientation of their migration. With this approach a flexible tool is provided for a wide range of applications in cell biophysics studies.

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Vectorial strain gauge method using single flexible orthogonal polydimethylsiloxane gratings

Cited by 22 publications

References 26 publications

A Force Measurement Method Based on Flexible PDMS Grating

A Force Measurement Method Based on Flexible PDMS Grating

Flexible Multifunctional Sensors for Wearable and Robotic Applications

Laser‐Assisted Strain Engineering of Thin Elastomer Films to Form Variable Wavy Substrates for Cell Culture

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