搜索结果: 1-15 共查到“工学 piezoelectric”相关记录25条 . 查询时间(0.078 秒)
压电材料作为一类重要的功能材料,可以将机械能和电能相互转换,在生物力传感、体内设备自供电和药物超声传递等可植入生物医学领域应用广泛。理想的可植入压电材料需要具备生物友好、可生物降解和高压电响应等特点,然而目前的压电材料难以兼具上述特点。
四川大学材料科学与工程学院吴家刚教授应Springer Nature邀请出版国际上第一本系统介绍无铅压电材料全英文专著——《Advances in Lead-Free Piezoelectric Materials》(图)
四川大学材料科学与工程学院 吴家刚 教授 Springer Nature 无铅压电材料 全英文专著 Advances in Lead-Free Piezoelectric Materials
2019/1/19
近日,应世界著名出版公司Springer Nature(斯普林格自然)的邀请,我校材料科学与工程学院吴家刚教授撰写了题为《Advances in Lead-Free Piezoelectric Materials》的全英文专著(ISBN 978-981-10-8997-8),吴家刚为唯一署名作者,四川大学作为唯一署名单位。该书共分九个章节,共计522页,是国际上第一本系统介绍无铅压电材料结构、性能...
New polymer-piezoelectric hybrid creates potential for “materials that compute”
New polymer-piezoelectric hybrid creates potential materials that compute
2015/7/13
Moving closer to the possibility of "materials that compute" and wearing your computer on your sleeve, researchers at the University of Pittsburgh Swanson School of Engineering have designed a respons...
GEOMETRIC PROPERTIES OF A MECHANICAL FORWARD MOTION COMPENSATION SYSTEM CONTROLLED BY A PIEZOELECTRIC DRIVE
Digital airborne camera Forward Motion Compensation Piezoelectric drive Geometrical quality Compensation error Radial distortion
2014/4/28
Forward Motion Compensation (FMC) systems have been designed to ensure the radiometric quality of motion acquisition in airborne cameras. If the radiometric benefits of FMC have been acknowledged, wha...
Nonlinearity analysis of piezoelectric micromachined ultrasonic transducers based on couple stress theory
piezoelectric micromachined ultrasonic transducer (pMUT) couple stress theory static deformation Nonlinearity analysis
2012/2/24
This paper studies the static deformation behavior of a piezoelectric micromachined ultrasonic transducer (PMUT) actuated by a strong external electric field. The transducer membrane consists of a pie...
Progress in engineering high strain lead-free piezoelectric ceramics
engineering high strain lead-free piezoelectric ceramics
2010/10/12
Environmental concerns are strongly driving the need to replace the lead-based piezoelectric materials currently employed as multilayer actuators. The current review describes both compositional and s...
Measurement of dynamic strain using an optic fibre system in adaptive composite laminates with an integrated piezoelectric sensor/actuator
smart composite materials health monitoring Fabry–Pérot interferometer piezoelectric
2011/5/5
This study seeks the development of adaptive composites capable to monitor and actively damp
vibrations. In the proposed material, vibrations measurements are performed by an embedded
low finesse op...
Design of piezoelectric energy harvesting devices subjected to broadband random vibrations by applying topology optimization
Topology optimization Energy harvesting Piezoelectric material
2012/2/29
Converting ambient vibration energy into electrical energy by using piezoelectric energy harvester has attracted a lot of interest in the past few years. In this paper, a topology optimization based m...
“V”型无阀压电泵的流阻特性(Property of Flow Resistance for Piezoelectric Pump with “V”-shape Tube)
压电泵 “V”型管 流阻特性
2009/12/28
基于扩散/渐缩管流动特性,提出一种用于无阀压电泵的 “V”型管,以满足微型全分析系统等应用需求。阐述了“V”型无阀压电泵的结构,对“V”型无阀压电泵内的流阻特性进行理论分析。通过采用有限元法对“V”型管进行模拟计算,研究“V”型管的结构参数对其流阻特性的影响。研究表明:“V”型管的分流角、扩散角以及进口宽度对其流阻特性影响较大,“V”型管的长度对其流阻特性影响较小;较大的“V”型管深度有利于提高泵...
Modelling of complex piezoelectric system by non-classical methods
Process systems design Piezoelectric plate Bimorph system
2009/12/14
Purpose: Present paper is continuation of earlier publications with stack of piezoelectric plates. This work is an author’s idea of calculations of complex systems with many elements.
Design/methodol...
Modified strip saturation model for a cracked piezoelectric strip
Applied mechanics Crack growth rate Piezoelectric ceramics
2009/12/2
Purpose: The investigations aim to propose a model for arresting an electrical opening of a crack which weakens
a narrow, poled and infinite piezoelectric strip. The edges of the strip are subjected ...
基于有限元模拟的泵用压电振子正交优化设计(Orthogonal Optimum Design of the Actuator for the Piezoelectric Pump Based on Finite Element Simulation)
压电泵 压电振子 正交设计法 优化设计
2009/9/11
作为压电泵的驱动源,压电振子的振动性能影响泵的性能。为此,对影响压电振子振动性能的压电振子结构参数以及材料参数进行优化设计。基于有限元模拟分析方法,采用正交试验和对分析结果进行极差分析,得到了各影响因素分别对压电振子中心点处振幅以及谐振频率两个重要指标影响的主次顺序,并得到了较好的方案。通过再设计试验分析,最终获得了提高压电振子振动性能的最优方案。
谷粒冲击压电力敏元件数值模拟与试验(Numerical Simulation and Test of Grain Impact Piezoelectric Yield Sensor谷粒冲击压电力敏元件数值模拟与试验Numerical Simulation and Test of Grain Impact Piezoelectric Yield Sensor)
谷粒 冲量式测产传感器 数值模拟
2009/8/11
设计了一种冲量式谷物质量流量压电传感器。应用显式动力学软件LS—DYNA建立了谷粒—力敏元件冲击有限单元模型,数值模拟了谷粒冲击力敏元件的过程,研究了力敏元件材料对冲击过程的影响。应用LabView软件和高性能压电陶瓷,开发了谷粒冲击力敏元件的物理样机试验系统,对数值模拟结果进行了检验。数值模拟和试验研究的结果表明:在1Cr18Ni9、聚丙烯和陶瓷(Si3N4)3种力敏材料中,陶瓷(Si3N4)是...
压电型电液伺服阀控制参数优化(Optimizing Control Parameters for a Piezoelectric Hydroelectric Servo-valve)
压电型电液伺服阀 数字控制器 控制参数
2009/8/11
根据伺服阀工作特点、设计及调试的需要,以积分分离PID作为控制算法,优选了伺服阀伺服控制系统的控制参数,构建了数字控制器。通过实验对控制效果进行了验证,分析了控制器控制参数对其性能的影响,给出了选择原则。通过试凑法,当取比例系数为5.3、积分时间常数为0.35、微分时间常数为3.0时,阀芯位移的上升时间小于6ms,得到较好的控制效果。
Study on Local Strain Distribution Measurement for Structural Members by using Piezoelectric Material and Sensor Array
Local Strain Distribution Measurement Structural Members Piezoelectric Material Sensor Array
2009/4/30
A new technique for surface strain distribution measurement has been developed by the use of piezoelectric material and sensor array. A piezoelectric element (PVDF film) is mounted onto the structure ...