China3D printingNet December 18th, researchers at Seoul National University (SNU) have developed a novel3D printingSensors enable humans to remotely interact with deformed soft robotic systems.
Facts have proved that the multifunctional device can be stretched and bent into complex shapes at will. It also has optical, microfluidic and piezoresistive sensing functions. During the test, the team was able to integrate its sensors into wearable and stimulus-driven actuators, allowing users to remotely control multiple robotic devices.
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Researchers are able to3D printingThe sensors (as shown in the picture) are integrated into multiple soft robotic devices. The picture comes from the “Science Robot” magazine.
Make soft robots more sensitive
In order to make the robot system more interactive with the environment and humans, scientists have conducted a lot of research. Initially, these studies focused on sensors that can respond to inputs (such as resistance or light intensity), but many sensors can only detect one mode of deformation at a time.
Although microfluidics and textile devices have shown promise in this field, they can only distinguish one sensor element, so they cannot distinguish between different types. Considering that a single stimulus can cause multiple deformation responses, there is still a great need to create a more adaptive soft sensor.
Various approaches have been taken to create multi-mode robots, including embedding fluid channels or sensing elements in elastomeric structures. However, physically combining sensors into one structure often affects their size and increases the complexity of the design and manufacturing process.
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use3D printing, The scientists were able to integrate three different sensing elements into one device (as shown in the picture). The picture comes from the “Science Robot” magazine.
The team’s new multi-mode sensor
In order to overcome the limitations of previous projects, the team3D printingA multifunctional sensor is able to detect individual deformation modes and decouple them all at once. The device itself has a microfluidic channel filled with ionic liquid, an elastic shell and a conductive fabric layer.
In theory, when the team’s design is deformed, its channel will act as a sensor and change its resistance. To put this into practice, the researchers placed their equipment under different forces and deployed machine learning techniques during the simulation to measure its multimodal capabilities.
Before applying local contact pressure, the sensor is bent from the neutral axis of the rotary joint to simulate tension, compression, and bending. The results show that the sensitivity of the device’s signal varies with the location where pressure is applied, indicating that it may respond to external stimuli.
In order to prove the potential of their sensors in human-machine interfaces, the scientists built two prototype systems. One is a wearable device that enables users to precisely control drones and robotic arms, while the other is a soft robot “wrist” composed of four actuators that can react to external forces.
Although the team admits that further testing is needed to eliminate manual production steps, compared to other designs, they consider their equipment to be an important step forward. In the future, scientists believe that their sensors can be used in large robots, thereby providing them with up to ten different sensing functions.
Advances in soft robotics technology
Researchers are increasingly adopting3D printingTechnology to create soft robots with more complex designs and advanced functions (from feeling to walking to “sweating”).
Scientists from Zhejiang University of Technology, Tianjin University, Nanjing University of Science and Technology and Ritsumeikan University have developed3D printingSoft robot finger. The team produced their additive numbers to prove that multiple materials can be used to simplify the robot production process.
At the same time, Cornell University researchers used3D printingCreated a soft robotic muscle that can control the internal temperature through sweat. The soft finger-like actuator allows the unfettered robot to run for a long time without overheating.
Elsewhere, a team from the University of California, San Diego has deployed additive manufacturing to produce robots inspired by walking insects. Budget-conscious robots aim to reduce the cost of entry for hobbyists and researchers seeking to enter the field.
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