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Home Tech Engineering

A soft robotic microfinger that enables interaction with insects through tactile sensing

author by author
November 10, 2022
in Engineering, Robotics
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En route to human-environment interaction technology with soft microfingers
Microfinger-insect interaction. (a) Schematic drawing of microfinger-insect (pill bug) interaction. Shade3D Basic ver. 17.0.0 (https://shade3d.jp/en/) was used to create the images. (b) Photograph of a developed microhand with five microfingers. This study focuses on a single microfinger, whereas the microhand in the photograph (b) implies the potential of human hand-insect interactions through the haptic teleoperation robot system. Credit: Scientific Reports (2022). DOI: 10.1038/s41598-022-21188-2

Humans have always been fascinated by scales different than theirs, from giant objects such as stars, planets and galaxies, to the world of the tiny: insects, bacteria, viruses and other microscopic objects. While the microscope allows us to view and observe the microscopic world, it is still difficult to interact with it directly.

However, human-robot interaction technology might change all that. Microrobots, for instance, can interact with the environment at much smaller scales than us. Microsensors have been used for measuring forces exerted by insects during activities such as flight or walking. Most studies so far have only focused on measuring insect behavior rather than a direct insect-microsensor interaction.

Against this backdrop, researchers from Ritsumeikan University in Japan have now developed a soft micro-robotic finger that can enable a more direct interaction with the microworld. The study, led by Professor Satoshi Konishi, was published in Scientific Reports.

“A tactile microfinger is achieved by using a liquid metal flexible strain sensor. A soft pneumatic balloon actuator acts as an artificial muscle, allowing control and finger-like movement of the sensor. With a robotic glove, a human user can directly control the microfingers. This kind of system allows for a safe interaction with insects and other microscopic objects,” explains Prof. Konishi.

Using their newly developed microrobot setup, the research team investigated the reaction force of a pill bug as a representative sample of an insect. The pill bug was fixed in place using a suction tool and the microfinger was used to apply a force and measure the reaction force of the bug’s legs.

The reaction force measured from the legs of the pill bug was approximately 10 mN (millinewtons), which agreed with previously estimated values. While a representative study and a proof-of-concept, this result shows great promise towards realizing direct human interactions with the microworld. Moreover, it can have applications even in augmented reality (AR) technology. Using robotized gloves and micro-sensing tools such as the microfinger, many AR technologies concerning human-environment interactions on the microscale can be realized.

“With our strain-sensing microfinger, we were able to directly measure the pushing motion and force of the legs and torso of a pill bug—something that has been impossible to achieve previously. We anticipate that our results will lead to further technological development for microfinger-insect interactions, leading to human-environment interactions at much smaller scales,” remarks Prof. Konishi.

More information:
Satoshi Konishi et al, Active tactile sensing of small insect force by a soft microfinger toward microfinger-insect interactions, Scientific Reports (2022). DOI: 10.1038/s41598-022-21188-2

Journal information:Scientific Reports
Provided by
Ritsumeikan University

Citation:
A soft robotic microfinger that enables interaction with insects through tactile sensing (2022, November 10)
retrieved 10 November 2022
from https://techxplore.com/news/2022-11-soft-robotic-microfinger-enables-interaction.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

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En route to human-environment interaction technology with soft microfingers
Microfinger-insect interaction. (a) Schematic drawing of microfinger-insect (pill bug) interaction. Shade3D Basic ver. 17.0.0 (https://shade3d.jp/en/) was used to create the images. (b) Photograph of a developed microhand with five microfingers. This study focuses on a single microfinger, whereas the microhand in the photograph (b) implies the potential of human hand-insect interactions through the haptic teleoperation robot system. Credit: Scientific Reports (2022). DOI: 10.1038/s41598-022-21188-2

Humans have always been fascinated by scales different than theirs, from giant objects such as stars, planets and galaxies, to the world of the tiny: insects, bacteria, viruses and other microscopic objects. While the microscope allows us to view and observe the microscopic world, it is still difficult to interact with it directly.

However, human-robot interaction technology might change all that. Microrobots, for instance, can interact with the environment at much smaller scales than us. Microsensors have been used for measuring forces exerted by insects during activities such as flight or walking. Most studies so far have only focused on measuring insect behavior rather than a direct insect-microsensor interaction.

Against this backdrop, researchers from Ritsumeikan University in Japan have now developed a soft micro-robotic finger that can enable a more direct interaction with the microworld. The study, led by Professor Satoshi Konishi, was published in Scientific Reports.

“A tactile microfinger is achieved by using a liquid metal flexible strain sensor. A soft pneumatic balloon actuator acts as an artificial muscle, allowing control and finger-like movement of the sensor. With a robotic glove, a human user can directly control the microfingers. This kind of system allows for a safe interaction with insects and other microscopic objects,” explains Prof. Konishi.

Using their newly developed microrobot setup, the research team investigated the reaction force of a pill bug as a representative sample of an insect. The pill bug was fixed in place using a suction tool and the microfinger was used to apply a force and measure the reaction force of the bug’s legs.

The reaction force measured from the legs of the pill bug was approximately 10 mN (millinewtons), which agreed with previously estimated values. While a representative study and a proof-of-concept, this result shows great promise towards realizing direct human interactions with the microworld. Moreover, it can have applications even in augmented reality (AR) technology. Using robotized gloves and micro-sensing tools such as the microfinger, many AR technologies concerning human-environment interactions on the microscale can be realized.

“With our strain-sensing microfinger, we were able to directly measure the pushing motion and force of the legs and torso of a pill bug—something that has been impossible to achieve previously. We anticipate that our results will lead to further technological development for microfinger-insect interactions, leading to human-environment interactions at much smaller scales,” remarks Prof. Konishi.

More information:
Satoshi Konishi et al, Active tactile sensing of small insect force by a soft microfinger toward microfinger-insect interactions, Scientific Reports (2022). DOI: 10.1038/s41598-022-21188-2

Journal information:Scientific Reports
Provided by
Ritsumeikan University

Citation:
A soft robotic microfinger that enables interaction with insects through tactile sensing (2022, November 10)
retrieved 10 November 2022
from https://techxplore.com/news/2022-11-soft-robotic-microfinger-enables-interaction.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.
Tags: augmented realityhuman interactionsliquid metal
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