Conferences related to Microvalves

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2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)

The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted papers will be peer reviewed. Accepted high quality papers will be presented in oral and postersessions, will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE


2020 IEEE Industry Applications Society Annual Meeting

The Annual Meeting is a gathering of experts who work and conduct research in the industrial applications of electrical systems.


2020 IEEE International Conference on Robotics and Automation (ICRA)

The International Conference on Robotics and Automation (ICRA) is the IEEE Robotics and Automation Society’s biggest conference and one of the leading international forums for robotics researchers to present their work.


IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society

IECON is focusing on industrial and manufacturing theory and applications of electronics, controls, communications, instrumentation and computational intelligence.


2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII)

The world's premiere conference in MEMS sensors, actuators and integrated micro and nano systems welcomes you to attend this four-day event showcasing major technological, scientific and commercial breakthroughs in mechanical, optical, chemical and biological devices and systems using micro and nanotechnology.The major areas of activity in the development of Transducers solicited and expected at this conference include but are not limited to: Bio, Medical, Chemical, and Micro Total Analysis Systems Fabrication and Packaging Mechanical and Physical Sensors Materials and Characterization Design, Simulation and Theory Actuators Optical MEMS RF MEMS Nanotechnology Energy and Power


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Periodicals related to Microvalves

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Biomedical Circuits and Systems, IEEE Transactions on

The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...


Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on

Methods, algorithms, and human-machine interfaces for physical and logical design, including: planning, synthesis, partitioning, modeling, simulation, layout, verification, testing, and documentation of integrated-circuit and systems designs of all complexities. Practical applications of aids resulting in producible analog, digital, optical, or microwave integrated circuits are emphasized.


Industrial Electronics, IEEE Transactions on

Theory and applications of industrial electronics and control instrumentation science and engineering, including microprocessor control systems, high-power controls, process control, programmable controllers, numerical and program control systems, flow meters, and identification systems.


Industry Applications, IEEE Transactions on

The development and application of electric systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; the encouragement of energy conservation; the creation of voluntary engineering standards and recommended practices.


Magnetics, IEEE Transactions on

Science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The Transactions publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.


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Xplore Articles related to Microvalves

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DSP solution for wall-climber micro-robot control using TMS320LF2407 chip

Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems (Cat.No.CH37144), 2000

This paper describes the controller design for a wall-climber micro-robot using a DSP chip. Because of its high-speed performance, its support for multi-motor control and its low power consumption, the TMS320LF2407 DSP from Texas Instruments (TI) demonstrates itself as an ideal candidate of the single chip controller for the wall-climber micro-robot.


Thermally driven microactuator containing thermal isolation structure with polyimide and its application to microvalve

TRANSDUCERS '03. 12th International Conference on Solid-State Sensors, Actuators and Microsystems. Digest of Technical Papers (Cat. No.03TH8664), 2003

We have developed a thermally /spl middot/ isolated bimorph structure based on a silicon (Si) /nickel (Ni) pair. A 2.5-mm-long beam of the bimorph was thermally isolated by a polyimide comb from the rest of the Si structure. The Si and Ni layers of the bimorph were 30 /spl mu/m and 25 /spl mu/m thick, respectively. This geometry enabled us ...


Normally closed piezoelectric micro valve

2010 Symposium on Design Test Integration and Packaging of MEMS/MOEMS (DTIP), 2010

Based on a previously developed piezoelectric membrane actuator a normally closed piezoelectric micro valve was designed. The presented paper briefly explains the principle of this novel actuator and continues with the possible design of a normally closed piezoelectric micro valve. The actuator operates with surface electrodes. The thus generated electric field causes an inhomogeneous mechanical stress distribution within the piezoelectric ...


The selfpriming VAMP

Proceedings of International Solid State Sensors and Actuators Conference (Transducers '97), 1997

The VAMP is a miniaturized device which is both, an active microvalve and a forward and reverse working micropump (VAMP=Valve And MicroPump). Operating in the valve mode, the device enables fluid to flow or blocks it. Operating in the pump mode, fluids can be pumped in both directions. The pump direction can be controlled by the driving frequency of the ...


An ultrasound-actuated micropump that uses nanoporous one-way membrane as nozzle-diffuser

2008 IEEE Ultrasonics Symposium, 2008

In this paper, we study a nozzle-diffuser micropump that is actuated by ultrasound waves. The nozzle-diffuser is made of a nanoporous one-way membrane. The micropump was formed by enclosing the nanoporous membrane into a PMMA small chamber. Once immersed into ultrasonic water bath, the pump can continuously pump the water through the one-way membrane. This device is ideal for future ...


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Educational Resources on Microvalves

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IEEE.tv Videos

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IEEE-USA E-Books

  • DSP solution for wall-climber micro-robot control using TMS320LF2407 chip

    This paper describes the controller design for a wall-climber micro-robot using a DSP chip. Because of its high-speed performance, its support for multi-motor control and its low power consumption, the TMS320LF2407 DSP from Texas Instruments (TI) demonstrates itself as an ideal candidate of the single chip controller for the wall-climber micro-robot.

  • Thermally driven microactuator containing thermal isolation structure with polyimide and its application to microvalve

    We have developed a thermally /spl middot/ isolated bimorph structure based on a silicon (Si) /nickel (Ni) pair. A 2.5-mm-long beam of the bimorph was thermally isolated by a polyimide comb from the rest of the Si structure. The Si and Ni layers of the bimorph were 30 /spl mu/m and 25 /spl mu/m thick, respectively. This geometry enabled us to generate the bending displacement (the stroke) of the free end of the bimorph up to 100 /spl mu/m at about 100 /spl deg/C with a generated force of about 15 mN. A low-voltage actuation (<3V) and low-energy consumption (<0.2W) were achieved. Besides, the miniaturized Si/Ni bimorph actuator was incorporated into the valve structure. The actual size of the fabricated valve is 7.3/spl times/5.8/spl times/1.2 mm/sup 3/. The flow rate from 0 to 500 ml/min at the air pressure of 47 kPa with low leakage rate of 0.03 ml/min and good linearity of the air pressure control were achieved.

  • Normally closed piezoelectric micro valve

    Based on a previously developed piezoelectric membrane actuator a normally closed piezoelectric micro valve was designed. The presented paper briefly explains the principle of this novel actuator and continues with the possible design of a normally closed piezoelectric micro valve. The actuator operates with surface electrodes. The thus generated electric field causes an inhomogeneous mechanical stress distribution within the piezoelectric material. Because of this the piezoelectric material is forced to deflect without any supporting passive membrane. If this actuator is placed smartly in a micro valve device a normally closed piezoelectric micro valve can be created, as will be shown in this paper.

  • The selfpriming VAMP

    The VAMP is a miniaturized device which is both, an active microvalve and a forward and reverse working micropump (VAMP=Valve And MicroPump). Operating in the valve mode, the device enables fluid to flow or blocks it. Operating in the pump mode, fluids can be pumped in both directions. The pump direction can be controlled by the driving frequency of the actuator. After recent optimization of the geometry and especially after optimization of the pump chamber height, we now achieved selfpriming of the VAMP with liquids. The VAMP has been manufactured in a small-lot production and is available for industrial evaluation.

  • An ultrasound-actuated micropump that uses nanoporous one-way membrane as nozzle-diffuser

    In this paper, we study a nozzle-diffuser micropump that is actuated by ultrasound waves. The nozzle-diffuser is made of a nanoporous one-way membrane. The micropump was formed by enclosing the nanoporous membrane into a PMMA small chamber. Once immersed into ultrasonic water bath, the pump can continuously pump the water through the one-way membrane. This device is ideal for future implantable drug release system that can be remotely controlled by ultrasound waves.

  • Micromachined sample divider for analyzing biochemical reaction based on single molecules

    We proposed novel type of a sample divider, which can easily divide the sample solution into multiple small amount of it on a chip, for single molecule analysis. We used the composite of a PDMS and an expancel<sup>R</sup> as a material, and fabricated the sample divider structure by applying the mold process. We investigated the PDMS and the expancel mixture fraction dependency, and effect of the heating time, on the channel closing performance. The flow channels were successfully closed when the volume ratio between the expancel and PDMS solution was 1:2 and the heating time was 15 minutes. From these results, we concluded that the proposed device is useful as the sample divider, if we optimally designed.

  • Micromachined silicon microvalve

    The fabrication and experimental results of an electrostatically actuated silicon microvalve which modulates a gas flow are presented. The microvalve converts an electric signal to a pneumatic signal for pressure or gas-flow control. Application areas for the microvalve include pneumatic flow control for industrial, commercial, and medical applications. The microvalve is integrally fabricated on a single silicon wafer using surface and bulk micromachining. The microvalve operates against pressures of up to 114 mmHg and flows of up to 150 sccm with a 30 volt signal and hold back pressures of up to 760 mmHg. The valve may be operated in DC or pulse width-modulated voltage modes.<<ETX>>

  • An Investigation Into Self Locking Condition of a Cam Structure Medical Micro-Valve

    To ensure the reliability of a cam structure medical digital micro valve, the functions between critical friction coefficients and related structure parameters of the friction couples in it were set up. Simulation results show that, in order to insure the cam can rotate to any angle, the radius of bulgy circle on the cam must be bigger than the eccentricity; The critical friction coefficient between the bulgy circle and the spool increases dramatically when the eccentricity decreases and the radius of bulgy circle increases; the critical friction coefficient between the spool and spool cover increases dramatically when the eccentricity and the radius of bulgy circle decrease.

  • Fabrication of microfluidic structures three-dimensionally embedded in glass by femtosecond laser

    Fabrication of hollow three-dimensional (3-D) microstructures embedded in a photosensitive glass by a femtosecond laser is demonstrated. This technique is applied for manufacturing microfluidic structures composed of microcells, microchannels, and microvalves.

  • Stand-alone micro fluidic system using partly disposable PDMS microwell array for high throughput cell analysis

    A stand-alone microfluidic system consists of a reusable flow control part and a disposable microwell array for high throughput cell analysis is proposed. The flow control part is realized with addressable microvalve array driven by compactly-fabricated solenoid actuators and EOF micropumps. Disposable 16 microwell array with 4 reagent injection ports was fabricated using a PDMS structure. The disposable fluidic chip can be easily replaced to different functional fluidic networks depended on their actual uses. The prototype system with 25 (52) on-chip hydraulic valves that are driven by 10 (2×5) solenoid actuators was fabricated. Precise reagent injection of ten-nanoliter order to each microwell was successfully carried out.



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