This paper introduces three sensor instruments for measuring mechanical properties of small organic elements in human ear: sensor instrument for measuring penetrating force of an eardrum, which is 60 mu m thick and ph...
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This paper introduces three sensor instruments for measuring mechanical properties of small organic elements in human ear: sensor instrument for measuring penetrating force of an eardrum, which is 60 mu m thick and phi 10 mm in diameter;sensor instrument for measuring tensile strength of an inner ear membrane, which is about 10 mu m thick, 0.2 mm wide and 0.5 mm long;and sensor instrument for measuring dynamic viscosity of a middle ear exudate with a volume of 50 mu l. These instruments contain force sensing units with parallel plate structure and strain gauges to provide fine resolution, for example, the sensor instrument for measuring tensile strength has a resolution of 1.51 X 10(-2) mN. Using the instruments on specimen from organic bodies, we measured the tensile strength of a mouse eardrum and round ear membrane from the inner ear;the former was 20 MPa at 0.57 strain and the latter, 5.0 MPa at 1.0 strain. (C) 2000 Elsevier Science S.A. All rights reserved.
Proximity sensing technology, which can obtain information without physical contact, has become an ideal choice in scenarios where physical contact is not feasible. Despite substantial advancements in tactile sensing,...
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Proximity sensing technology, which can obtain information without physical contact, has become an ideal choice in scenarios where physical contact is not feasible. Despite substantial advancements in tactile sensing, proximity sensing technology still holds great potential and has yet to be fully developed. Among numerous proximity sensing technologies, the fringing-effect-based capacitive proximity sensor (FE-CPS) has garnered considerable attention due to its low cost, low power consumption, wide sensing range, and flexible and versatile structural design. However, research on FE-CPS has not yet formed a complete system, and its development and intellectualization are still in their infancy, urgently requiring a systematic review to advance its development. This paper systematically summarizes the recent advances in FE-CPS, from basic theory to practical applications. The working principle and typical structure of FE-CPS are first introduced, followed by a discussion of methods for optimizing device performance. Furthermore, the application scenarios of FE-CPS in intelligent pre-alarm systems, intelligent control systems, and intelligent material perception systems are reviewed. Finally, the future development and challenges faced by FE-CPS are prospected. Summarizing the importance of fringing-effect-based capacitive proximity sensors (FE-CPS) for overcoming current development bottlenecks and achieving higher levels of intelligence is crucial. This review provides a comprehensive overview of the typical structures and optimization strategies for constructing FE-CPS, and reviews the latest research advance in advanced application scenarios. image
The plate-type structures are classical configurations in many engineering applications. A comprehensive understanding of the structural dynamic mechanisms is of great significance. An analytical modeling approach is ...
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The plate-type structures are classical configurations in many engineering applications. A comprehensive understanding of the structural dynamic mechanisms is of great significance. An analytical modeling approach is established and applied to investigate the dynamic characteristics of a plate system. The model encompasses two parallel elastically restrained rectangular plates coupled through mechanical links. The linear stiffness parameters are used to simulate various structural boundary conditions and mechanical links. The wave propagation of the platestructure is considered based on the improved Fourier series method. And the theoretical formulations for the dynamic performance of the plate system are obtained by employing the energy principle and Rayleigh-Ritz method. The stability and efficiency of the proposed model are firstly validated for the plate system with classical boundary conditions by comparing the results obtained from FEM software. Subsequently, the boundary restraining parameters are analyzed to figure out their effects on the modal characteristics of the plate system. In addition, the influence of mechanical link distributions on the forced response properties of the plate system is presented and discussed. Numerical results show that the importance of both the boundary conditions and the mechanical link distributions on the dynamic behavior of the plate system. The obtained results of the dynamic investigation and parametric analysis of the plate system can be useful for the further work of vibration and noise control technology of engineering applications.
A novel structure for a six-axis force/moment sensor is proposed in this paper. parallel plate structures are combined in the one-block structure of the sensor. A method for estimating the sensitivity and stiffness is...
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A novel structure for a six-axis force/moment sensor is proposed in this paper. parallel plate structures are combined in the one-block structure of the sensor. A method for estimating the sensitivity and stiffness is developed by comparing the results of numeric estimations with those of finite element method (FEM) analyses. A detailed FEM model was used to analyse the surface strain in the area where the strain gauge was attached. Tests carried out on the characteristics revealed a sensitivity design error of less than 8.5%, a relative measurement error of less than 2.13%, and an interference error of less than 9.51%. A performance enhancement method is also proposed.
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