Journal of Micromechatronics最新文献_第5页

Two-dimensional vision-based autonomous microparticle manipulation using a nanoprobe 基于二维视觉的纳米探针自主微粒操作

Journal of Micromechatronics Pub Date : 1900-01-01 DOI: 10.1163/156856306777924671

M. Sitti, C. Pawashe

{"title":"Two-dimensional vision-based autonomous microparticle manipulation using a nanoprobe","authors":"M. Sitti, C. Pawashe","doi":"10.1163/156856306777924671","DOIUrl":"https://doi.org/10.1163/156856306777924671","url":null,"abstract":"Autonomous micromanipulation has been an emerging interest in constructing and assembling micro-objects. Manual assembly and manipulation of small-scale objects through teleoperation is possible; however, autonomy is necessary for large-volume manipulation and manufacturing. In this study, we discuss a two-dimensional autonomous manipulation system, which is based on an optical microscope and a nanoprobe. We demonstrate the manipulation of polystyrene and silica microspheres, which are detected through image processing using the generalized Hough transform. Using an atomic force microscope nanoprobe as an end-effector, microspheres are autonomously pushed to a user-defined configuration. Furthermore, we demonstrate motion planning in micromanipulation by using the Wavefront expansion algorithm, which is necessary in manipulating microspheres without colliding into obstacles. In experiments, we successfully demonstrate the automatic arrangement of 4.5 μm polystyrene and 5 μm silica microspheres into user-defined patterns with an average precision of around 0.5 μm, which is limited by the microscope imaging resolution. This autonomous microparticle arrangement system could be applied to fabricate mold templates for micro/nanoprinting and prototyping micro/nanodevices.","PeriodicalId":150257,"journal":{"name":"Journal of Micromechatronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134262507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30

In-pipe wireless micro robot 管道内无线微型机器人

Journal of Micromechatronics Pub Date : 1900-01-01 DOI: 10.1163/156856301760132150

T. Sasaya, N. Kawahara, K. Tsuruta

引用次数: 18

Diamagnetic suspension system for small rotors 小转子抗磁悬挂系统

Journal of Micromechatronics Pub Date : 1900-01-01 DOI: 10.1163/156856301753398154

R. Moser, H. Bleuler, J. Sandtner

{"title":"Diamagnetic suspension system for small rotors","authors":"R. Moser, H. Bleuler, J. Sandtner","doi":"10.1163/156856301753398154","DOIUrl":"https://doi.org/10.1163/156856301753398154","url":null,"abstract":"A novel frictionless motor-bearing combination, featuring a passive five degrees of freedom (DOF) suspension system is presented in this paper. In conventional frictionless systems, levitation is achieved by means of feedback controlled electromagnetics or electrostatics (active bearings), permanent magnets in combination with displacement (passive bearings) or by superconductive repulsion of permanent magnets. Earnshaw's theorem discards the possibility of passive static magnetic levitation, but by taking advantage of the diamagnetic effect, a passive magnetic system can be stabilized. In the proposed system, all the degrees of freedom of a disc-shaped magnetic rotor, except its rotation around the main axis, are stabilized using the diamagnetic properties of materials such as bismuth and graphite. As the weight of the rotor is compensated with a permanent magnet, the proposed system can make use of the weak diamagnetic repelling forces, presenting the only known principle for 'real' levitation (no energy input) at room temperature. The presented approach leads to very compact energy-saving solutions. The principle of diamagnetic levitation is well known and understood. The presented experimental work adds radial stiffness to the classic three degrees of freedom suspension and powers the rotor using an induction motor. The realized motor is hardly bigger than one cubic centimeter and turns with up to 800 rpm. This paper intends to draw attention to this uncommon method of levitation and to show that it could be used to design micro-mechatronical actuators.","PeriodicalId":150257,"journal":{"name":"Journal of Micromechatronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125983273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Steady-state analysis of a precision hydraulic flow control servovalve using the finite element method 用有限元法对精密液压流量控制伺服阀进行稳态分析

Journal of Micromechatronics Pub Date : 1900-01-01 DOI: 10.1163/156856306777544952

Singaperumal, S. Hiremath, R. Kumar

{"title":"Steady-state analysis of a precision hydraulic flow control servovalve using the finite element method","authors":"Singaperumal, S. Hiremath, R. Kumar","doi":"10.1163/156856306777544952","DOIUrl":"https://doi.org/10.1163/156856306777544952","url":null,"abstract":"In the present paper, an attempt has been made to simulate the steady-state operation of the jet pipe Electro-Hydraulic ServoValve (EHSV) using the Finite Element Method (FEM). The jet pipe servovalve has two stages and consists of two main assemblies: first-stage torque motor assembly and second-stage valve assembly. Between the first and second stage there is a mechanical feedback to stabilize the valve operation. Each assembly has various delicate and precise components. The finite element analysis has been carried out on jet pipe and feedback spring assembly. The analysis shows that the stiffness of flexure tube and feedback spring assembly plays the major role in achieving steady-state valve operation. The stiffness of these components is obtained through the FEM and these results are validated with experiment. The commercial ABAQUS finite element code has been used for the simulation. The mathematical model of the jet pipe EHSV has been developed and simulated using MATLAB to study the spool dynamics with the main emphasis on the steady-state valve operation. The required simulation parameters, like moment of inertia, stiffness of the components and lever arm length. are obtained from the FEM.","PeriodicalId":150257,"journal":{"name":"Journal of Micromechatronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131448738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Miniature mobile robots for plume tracking and source localization research 用于羽流跟踪和源定位研究的微型移动机器人

Journal of Micromechatronics Pub Date : 1900-01-01 DOI: 10.1163/156856301760132141

Steven E. Eskridge, J. Hurtado, R. Byrne, J. Harrington, E. Heller, D. Adkins

引用次数: 30

Fabrication of aluminum electrodes by water and light 水和光制备铝电极

Journal of Micromechatronics Pub Date : 1900-01-01 DOI: 10.1163/156856304773954296

B. Cahill, D. Haefliger, A. Stemmer

{"title":"Fabrication of aluminum electrodes by water and light","authors":"B. Cahill, D. Haefliger, A. Stemmer","doi":"10.1163/156856304773954296","DOIUrl":"https://doi.org/10.1163/156856304773954296","url":null,"abstract":"Rapid fabrication of 1-5-μm-wide aluminum electrodes by a flexible, inexpensive and high-resolution process is demonstrated. The electrodes are produced by scanning a cw focused laser beam of 488 nm wavelength over an aluminum thin film of 50-100 nm thickness immersed in pure water and removing the metal by local low-power laser-thermal corrosion. The process is performed on a set-up operating in common laboratory conditions. The aluminum patterning requires only several milliwatts of laser light, which allows the use of inexpensive light sources and makes it especially suitable for structuring metal films on heat-sensitive materials such as polymers. Interdigitated microelectrode arrays on poly(dimethylsiloxane) and SU-8 resist are fabricated without damaging the substrate. By taking advantage of the intrinsic 3D processing capability of laser machining and thick film techniques developed for polymer-based microsystems, multilayered electrode structures in SU-8 are produced. Interconnections between the different electrode layers are realized via holes drilled through the intermediate polymer by laser ablation in air and subsequent metallization. The rapid prototyping of an asymmetric electrode array for electrohydrodynamic pumping within 4 h is demonstrated. Successful testing of the device by pumping of water provided evidence of correct electrode operation.","PeriodicalId":150257,"journal":{"name":"Journal of Micromechatronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131158400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Capillary Pressure Microinjection of Living Adherent Cells: Challenges in Automation 活贴壁细胞的毛细管压力显微注射:自动化的挑战

Journal of Micromechatronics Pub Date : 1900-01-01 DOI: 10.1163/156856306777924653

P. Kallio, J. Kuncova-Kallio

{"title":"Capillary Pressure Microinjection of Living Adherent Cells: Challenges in Automation","authors":"P. Kallio, J. Kuncova-Kallio","doi":"10.1163/156856306777924653","DOIUrl":"https://doi.org/10.1163/156856306777924653","url":null,"abstract":"This paper is divided into two parts. The first part describes the current status and the general challenges of developing automatic microrobotics systems for microinjection of adherent mammalian cells. The discussion covers applications and the review and challenges of the components of a capillary pressure microinjection system: a micromanipulator, a microinjector, a microcapillary, a vision system and an environment control system. The second part of the paper describes the research performed on the automatic capillary pressure microinjection at Tampere University of Technology. The advanced microinjection system includes two micromanipulators, a microinjector, a vision system and a control system. The control system comprises motion control schemes for the micromanipulators to accurately position a microcapillary, to precisely penetrate a cell membrane and to deliver information on the injection to the operator. A novel injection guidance system, being part of the control system, comprises an impedance measurement device and a user interface which provide information on the detection of the capillary–membrane contact, capillary clogging and capillary breakage. Results show a remarkable increase of the injection success from 40 to 65% when the injection guidance system is used.","PeriodicalId":150257,"journal":{"name":"Journal of Micromechatronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126155566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 29