Merkel's Disks Bioinspired Self‐Powered Flexible Magnetoelectric Sensors Toward the Robotic Arm's Tactile Perceptual Functioning and Smart Learning

Ma, Zheng; Ai, Jingwei; Zhang, Xuan; Du, Zhuolin; Wu, Zhenhua; Wang, Kun; Chen, Dezhi; Su, Bin

doi:10.1002/aisy.201900140

Cited by 27 publications

(13 citation statements)

References 38 publications

(44 reference statements)

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“…Figure b1–b5 and Figure c1–c5 show the top view and the side view of the static magnetic field nephograms for the calculated magnetic distribution of the model when the ferromagnetic liquid droplet is at different positions corresponding to Figure a1–a5, which is above the coil and the magnetic bottom. According to our previous study, the Nd 2 Fe 14 O/Ecoflex composite magnetic bottom can be treated as a unary system. , As shown in Figure b1–b5 and Figure c1–c5, the magnetic field nephograms show the magnetic intensity of the unary magnetic bottom. The color bar represents gradually increased magnetic intensity from blue to red, and the strongest magnetic intensity appears around the surface of the unary magnetic bottom.…”

Section: Resultsmentioning

confidence: 89%

Ferromagnetic Liquid Droplet on a Superhydrophobic Surface for the Transduction of Mechanical Energy to Electricity Based on Electromagnetic Induction

Wang

et al. 2021

ACS Nano

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Ferromagnetic liquids undergo reversible magnetization changes upon varying external magnetic field levels. The movement of ferromagnetic liquid droplets across a coil under an external magnetic field holds promise as an energy transducer from mechanical force to electricity; however, it suffers from an adhesive issue between the ferromagnetic liquid and the solid pedestal. We introduce a superhydrophobic support that uses antiwetting surfaces to remarkably reduce adhesion during the movement of ferromagnetic liquid droplets. Maxwell numerical simulation was utilized to analyze the working mechanism and improve further electrical outputs. By controlling the droplet size, the strength of the magnetic bottom and the tilting speed of the test condition, we generated a ferromagnetic liquid droplet-based superhydrophobic magnetoelectric energy transducer (FLD-SMET) that can convert vibrational energy to electricity. When a 100 μL ferromagnetic liquid droplet was used for FLD-SMET under a 13 mT magnetic field, an electrical voltage response of 280 μV and electrical current response of ∼7.5 μA were generated using a shaking machine with a tilting speed of 9.5°/s. We thus show that such a device can serve as a self-powered light buoy floating on a water surface. Our study presents an applied concept for the design of droplet-based energy harvesters to convert surrounding vibrational energy to electricity.

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Section: Resultsmentioning

confidence: 89%

Ferromagnetic Liquid Droplet on a Superhydrophobic Surface for the Transduction of Mechanical Energy to Electricity Based on Electromagnetic Induction

Wang

et al. 2021

ACS Nano

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“…This concept of energy conversion is widely used for 3D-printed magnetic sensors. [143] Several key magnetic parameters for magnetic materials are important descriptors. The relative magnetic permeability is defined as μ r = B/(μ 0 H), where μ 0 = 4π × 10 −7 NAm 2 corresponds to the magnetic permeability of the free space, B is the magnetic flux density, and H is the magnetic field.…”

Section: Principle and Mechanism Of Magnetic Components In Electronicsmentioning

confidence: 99%

3D Printing of Functional Magnetic Materials: From Design to Applications

Zhang

Jiang

et al. 2021

Adv Funct Materials

114

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The research of functional magnetic materials has become a hot topic in the past few years due to their fast, long‐range, and precise response in diverse environments. Functional magnetic devices using different magnetic materials and structure designs have been developed and demonstrated good advantages to enable various applications. However, the required magnetic materials and structure designs for diverse functions also increase the fabrication difficulties while developing such devices. 3D printing technology presents a powerful and promising manufacturing approach to rapidly fabricate functional magnetic devices of complex geometries in multiple materials and scales. Here, various 3D printing strategies and the underlying mechanisms of functional magnetic materials for several primary applications are systematically reviewed, including, magnetic anisotropy for property enhancement, magnetic robots, magnetic components in electronics, and magneto‐thermal devices. Finally, the current challenges and future perspectives in engineering 3D printed functional magnetic devices are discussed.

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“…[106] Another design of mechanical 3D sensors as shown in Figure 5d is a bioinspired self-powered soft tactile sensor that is based on flexible magneto-electric materials. [107] The top magnetic part to mimic Merkel's disks and the bottom electrical one are the main parts of the sensor. Nd 2 Fe 14 B magnetic powders with a diameter ranging from 100 to 200 µm were well dispersed in Ecoflex with a ratio of 7/3 (weight basis).…”

Section: Mechanical Sensing Robotmentioning

confidence: 99%

New Frontiers in 3D Structural Sensing Robots

Kaur

Kim

2021

Advanced Materials

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robots are also capable to form strong emotional bonds with humans such as in robotic pets. [8] For these tasks, the robots are able to detect and realize the human's needs such as health condition and emotional states. Hence, it is essential to design the robots with specific functionalities to be "sensing robots." The sensing robots refer the robot platforms with sensing functionalities to detect environmental stimuli or changes by taking over one or more complex tasks from human. To develop sensing robots that are responsive to the surrounding complex environments, sensors and their supporting circuits should be integrated into the robotic bodies. First, it is important to design sensors that have good sensitivity and reliability to track any changes in the environment and to transfer data to a monitoring unit. [9] Next, the structure of sensors should be embedded in the internal or external space of robots without hindering the motions of the robotic body for data acquisitions. [10] Lastly, to assist the robots to act, a well-responsive, closed-loop system is mandatorily required. [11,12] Based on these, a futuristic robot equipped with sensors will have good performance for monitoring real-time events and will have the advanced diagnostics to provide immediate feedback of the surrounding changes during sensing. [12] In terms of sensor designs, we are still far from developing a sensor that can be used in practical sensing robots. Although earlier research works regarding 2D [13,14] or planar sensors [14,15] with high performance and good flexibilities have been extensively reported for their applications as irregularly shaped body parts such as wearables or e-skin based sensors, [16] these developed sensors are still insufficient for sensing robots due to various challenges including electronic or structural integration, stable positioning of sensors during robot actuation, and more difficult data processing derived from the complex structure for the robot actuation. [17][18][19] Therefore, beyond merely using 2D types of sensors, 3D sensors integrated into 3D objects are naturally suggested as the next-generation sensors and are employed in sensing robots to overcome their geometrical barriers for sensor integrations. [18][19][20] This is because such 3D structural approaches enable to integrate sensing parts, actuators, and their computation as one system into the 3D structures. [18,21] Additionally, one more dimensional design of electrical components allows to add more circuit systems into the limited internal space of Advanced robotics is the result of various contributions from complex fields of science and engineering and has tremendous value in human society. Sensing robots are highly desirable in practical settings such as healthcare and manufacturing sectors through sensing activities from human-robot interaction. However, there are still ongoing research and technical challenges in the development of ideal sensing robot systems. The sensing robot should synergically merge sensors and robotics. Geo...

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Merkel's Disks Bioinspired Self‐Powered Flexible Magnetoelectric Sensors Toward the Robotic Arm's Tactile Perceptual Functioning and Smart Learning

Cited by 27 publications

References 38 publications

Ferromagnetic Liquid Droplet on a Superhydrophobic Surface for the Transduction of Mechanical Energy to Electricity Based on Electromagnetic Induction

Ferromagnetic Liquid Droplet on a Superhydrophobic Surface for the Transduction of Mechanical Energy to Electricity Based on Electromagnetic Induction

3D Printing of Functional Magnetic Materials: From Design to Applications

New Frontiers in 3D Structural Sensing Robots

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