Motion Recognition System of Table Tennis Players Based on MEMS Sensor

Tang, Wei; Chen, Chonggao

doi:10.1007/978-3-030-82565-2_11

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Due to the technologies used in the manufacture of microelectronics, the size of the sensors can be reduced to a match head, but the accuracy and mechanical strength, in most cases, will decrease. The last two parameters, considered to be disadvantages, are not decisive in the consumer segment, which allowed MEMS to become widespread in medicine [ 1 ], sports [ 2 ], the gaming industry [ 3 ] and especially in portable technology [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Topological Optimization of Circular SAW Resonators: Overcoming the Discreteness Effects

Shevchenko¹,

Mikhailenko²

2022

Sensors

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Recently, we proposed a ring-shaped surface acoustic wave (SAW) resonator sensitive element design, as well as analyzed its characteristics and suggested its optimization strategy, with major focus on their temperature stability. Here, we focus on further optimization of the design to narrow the bandwidth and improve signal detection, while taking into account typical technological limitations. Additionally, the purpose of design optimization and modeling is to check the preservation of operability in the case of lithography defects, which is the most common technological error. For that, we suggest structural alteration of the interdigital transducer (IDT) that leads to its partial fragmentation. Using COMSOL Multiphysics computer simulations, we validate several IDT options and show explicitly how it could be optimized by changing its pin geometry. Based on the results of the study, prototyping and printing of ring resonators on a substrate using photolithography will be carried out.

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Section: Introductionmentioning

confidence: 99%

Topological Optimization of Circular SAW Resonators: Overcoming the Discreteness Effects

Shevchenko¹,

Mikhailenko²

2022

Sensors

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Optimizing the Design of Surface-Acoustic-Wave Ring Resonator by Changing the Interdigitated Transducer Topology

Shevchenko

Mikhailenko

Nyamweru

2021

Izv. vysš. učebn. zaved. Ross., Radioèlektron.

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Introduction. Previous works considered the frequency characteristics and methods for fixing sensitive elements in the form of a wave ring resonator on surface acoustic waves in a housing made of various materials, as well as the influence of external factors on sensitive elements. It was found that the passband in such a case is sufficiently wide, which can affect adversely signal detection when measuring acceleration using the sensitive element under development. Therefore, it has become relevant to reduce the sensitive element’s bandwidth by changing the design of the interdigitated transducer (IDT).Aim. To demonstrate an optimal topology for an IDT with a low bandwidth, leading to improved signal detection when acceleration affects the sensitive element.Materials and methods. The finite element method and mathematical processing in AutoCAD and in COMSOL Multiphysics.Results. Nine topologies of IDT are proposed. All these types were investigated using the COMSOL Multiphysics software on lithium niobate substrates, which material acts as a sensitive element. The frequency characteristics are presented. The data obtained allowed an optimal design of the ring resonator to be proposed: an IDT with rectangular pins without selective withdrawal.Conclusion. Self-generation in a ring resonator can be performed by withdrawing no more than one pair of IDTs for 10 or more periods. In this case, the withdrawal of IDTs should be uniform. With an increase in the number of IDT withdrawals, the geometry of the ring resonator is violated, and the wave leaves the structure. The presence of a shared bus keeps the surface acoustic wave inside the IDT structure, and the narrowing of the periods towards the inner part of the structure makes it possible to improve the frequency characteristics of the ring resonator on surface acoustic waves.

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Motion Recognition System of Table Tennis Players Based on MEMS Sensor

Cited by 2 publications

References 13 publications

Topological Optimization of Circular SAW Resonators: Overcoming the Discreteness Effects

Topological Optimization of Circular SAW Resonators: Overcoming the Discreteness Effects

Optimizing the Design of Surface-Acoustic-Wave Ring Resonator by Changing the Interdigitated Transducer Topology

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