FoamSense

Nakamaru, Satoshi; Nakayama, Ryosuke; Niiyama, Ryuma; Kakehi, Yasuaki

doi:10.1145/3126594.3126666

Cited by 23 publications

(11 citation statements)

References 25 publications

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“…The sensing was implemented using the other two layers by adding piezoresistive porous (foam-like) sensors. These piezoresistive sensors 18,19,20 change their resistance when subjected to a load. The resistance of the sensors was measured using a voltage divider (see Fig.…”

Section: Soft Sensorized Insole Design and Force Estimation Methodsmentioning

confidence: 99%

3D Printed Graded Porous Sensors for Soft Sensorized Insoles with Gait Phase & Ground Reaction Forces Estimation

Willemstein¹,

Sridar²,

Kooij³

et al. 2023

Preprint

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Sensorized insoles provide a tool to perform gait studies and health monitoring during daily life. These sensorized insoles need to be comfortable and lightweight to be accepted. Previous work has already demonstrated that sensorized insoles are possible and can estimate both ground reaction force and gait cycle. However, these are often assemblies of commercial components restricting design freedom and flexibility. Within this work, we investigate the feasibility of using four 3D-printed porous (foam-like) piezoresistive sensors embedded in a commercial insole. These sensors were evaluated using an instrumented treadmill as the golden standard. It was observed that the four sensors behaved in line with the expected change in pressure distribution during the gait cycle. In addition, Hammerstein-Wiener models were identified that were capable of estimating the vertical and mediolateral ground reaction forces (GRFs). Their NRMSE fits were on average 82% and 73%, respectively. Similarly, for the averaged gait cycle the R 2 values were 0.98 and 0.99 with normalized RMS errors overall below 6%. These values were comparable with other insoles based on commercial force sensing resistors but at a significantly lower cost (over four times cheaper). Thereby indicating that our 3D-printed sensors can be an interesting option for sensorized insoles. The advantage of 3D printing these sensors is that it allows for significantly more design freedom, reduces assembly, and is cheaper. However, further research is needed to exploit this design freedom for complex sensors, estimate the anteroposterior GRF, and fully 3D print the entire insole.

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Section: Soft Sensorized Insole Design and Force Estimation Methodsmentioning

confidence: 99%

3D Printed Graded Porous Sensors for Soft Sensorized Insoles with Gait Phase & Ground Reaction Forces Estimation

Willemstein¹,

Sridar²,

Kooij³

et al. 2023

Preprint

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“…For example, Ngyuen et al proposed the SOFTii input system constructing embossed contours for digital design and game control through sequential modeling [28]. The FoamSense sensor employed conductive ink and a porous soft object to measure the user's compression, bending, twisting, and shearing operations [29]. Weigel et al reported a wearable mini-device, DeformWear, for single-point deformation interaction (e.g., squeezing, compression, and shearing) on a limited surface [30].…”

Section: B Non-rigid Input Devicementioning

confidence: 99%

OneTip Is Enough: A Non-Rigid Input Device for Single-Fingertip Human-Computer Interaction With 6-DOF

Li,

Zhou,

Zhang

et al. 2024

Preprint

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With the development of novel display technologies such as 3-D graphical applications, virtual and augmented reality, there are new demands for more efficient and natural multi-degree-of-freedom (DOF) interaction devices. However, traditional rigid touchscreens provide only the 2-D position of the touch point as input information, which cannot meet the needs of high DOF interactions, and many of the existing interaction technologies suffer from the problems of low resolution and lack of information. At the same time, non-rigid interaction interfaces provide deformability for input and have been shown to extend the richness of input vocabulary. This article proposes a new non-rigid input device, OneTip, for single-fingertip human-computer interaction with 6-DOF. In terms of design and manufacture, OneTip employs the bio-inspired design of Skin-On interfaces to mimic the sensitivity of human skin and provide 6-DOF interaction capabilities. In terms of sensing, OneTip uses the visuotactile sensing technique based on the marker displacement method to achieve high-resolution and multi-modal measurements. We propose a novel fingertip pose estimation method based on incipient slip detection, a non-learning algorithm that does not require registration and priori information. Experiments show that OneTip had good 6-D pose estimation accuracy, with RMSEs of translation and rotation not exceeding 0.1mm and 2.6°, respectively, within the linear interval. Extensive experiments were also conducted to explore the application of OneTip in typical virtual manipulation tasks and the possibility of combining it with other interaction devices. This work is intended to serve as a reference for other researchers exploring innovative interaction techniques.

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“…In recent years, researchers have explored how to use the fexibility and softness of materials to create interactive objects. Some work creates sensors by mixing soft and conductive materials together such as coating sponges in conductive ink [22], curing a carbon-flled elastomer [37], embedding conductive ink into 3D printing with fexible thermoplastic polyurethane (TPU) [1], and printing TPU and conductive flaments together [31]. Using the same fexible material of TPU, Ion et al print mechanisms composed of metamaterial cells [12].…”

Section: Sof Materials Fabricationmentioning

confidence: 99%

Desktop Electrospinning

Rivera

Hudson

2019

Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems

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Figure 1: A range of objects fabricated on our novel 3D printer using rigid plastic and electrospun textiles: (A) a close-up of our printer electrospinning; (B) an origami-style folding lamp with piezoresistve brightness control and a soft custom-shaped capacitive toggle switch that use electrospun textiles for sensing and tactile experiences; (C) an actuated electrospun and rigid plastic fower that opens when an electrospun textile liquid sensor detects sufcient water in the soil; (D) a sheep comic that uses electrospun textile with capacitive sensing to create an interactive tactile experience.

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FoamSense

Cited by 23 publications

References 25 publications

3D Printed Graded Porous Sensors for Soft Sensorized Insoles with Gait Phase & Ground Reaction Forces Estimation

3D Printed Graded Porous Sensors for Soft Sensorized Insoles with Gait Phase & Ground Reaction Forces Estimation

OneTip Is Enough: A Non-Rigid Input Device for Single-Fingertip Human-Computer Interaction With 6-DOF

Desktop Electrospinning

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