The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform

Tadeusz Stepinski - One of the best experts on this subject based on the ideXlab platform.

  • properties of Interdigital Transducers for lamb wave based shm systems
    Structural Health Monitoring-an International Journal, 2011
    Co-Authors: Michał Mańka, Adam Martowicz, Mateusz Rosiek, Tadeusz Uhl, Tadeusz Stepinski
    Abstract:

    Recently, an intensive research activity has been observed concerning the application of guided waves to long range ultrasound (LRUT) and structural health monitoring. Guided waves propagating in plates, known as Lamb waves, have appeared to be suitable for monitoring and condition evaluation of planar structures. Lamb waves can be generated using different types of actuators including piezoelectric or electromagnetic acoustic Transducers. In this paper a novel type of piezoelectric Transducers is presented based on macro-fiber piezocomposite (MFC). Contrary to the previously presented MFC Transducers the Transducers presented here are provided with Interdigital electrodes matched to certain wavelength. Two different designs of Interdigital Transducers (IDT) made of MFC substrate are presented in the paper together with the results of numerical simulations and experimental tests.

  • design and simulations of Interdigital Transducers for lamb wave based shm systems
    11th IMEKO TC 10 Workshop on Smart Diagnostics of Structures Kraków Polen, 2010
    Co-Authors: Michał Mańka, Adam Martowicz, Mateusz Rosiek, Tadeusz Uhl, Tadeusz Stepinski
    Abstract:

    Structural health monitoring systems have been constantly improved in the past decades. A complete system should consists of two main components: a network of sensors placed on monitored structure and a system of data analysis for its processing and interpretation. Sensors in a SHM system should be builtin to allow for continuous measurement in opposite to non destructive evaluation (NDE) methods where sensors are temporarily mounted on a structure only during measurements. One of the most promising type of the Transducers dedicated for SHM systems are Interdigital Transducers (IDT) which are designed for ultrasonic Lamb wave monitoring. Mode selectivity, excitation strength, wave directivity, size and relatively low cost are the most important advantages of IDT. In presented paper after a short introduction of Lamb waves and SHM systems, the advantages and disadvantages of IDT are discussed. Next, the main aspects of designing a narrow band IDT are presented. As an example of the designing process, a transducer used for the excitation of the first antisymmetric mode (A0) in a thick aluminum plate was chosen. To verify the properties of designed Transducers a FE model was built and then simulated in ANSYS Multiphysics software. In the final part of the paper obtained results are presented and discussed.

Ruoyu Zhong - One of the best experts on this subject based on the ideXlab platform.

  • Correction: Acoustic tweezers based on circular, slanted-finger Interdigital Transducers for dynamic manipulation of micro-objects.
    Lab on a chip, 2020
    Co-Authors: Putong Kang, Zhenhua Tian, Shujie Yang, Haodong Zhu, Hunter Bachman, Shuaiguo Zhao, Peiran Zhang, Zeyu Wang, Ruoyu Zhong
    Abstract:

    Correction for 'Acoustic tweezers based on circular, slanted-finger Interdigital Transducers for dynamic manipulation of micro-objects' by Putong Kang et al., Lab Chip, 2020, 20, 987-994, DOI: .

  • acoustic tweezers based on circular slanted finger Interdigital Transducers for dynamic manipulation of micro objects
    Lab on a Chip, 2020
    Co-Authors: Putong Kang, Zhenhua Tian, Shujie Yang, Haodong Zhu, Hunter Bachman, Shuaiguo Zhao, Peiran Zhang, Zeyu Wang, Ruoyu Zhong, Tony Jun Huang
    Abstract:

    Acoustic tweezing technologies are gaining significant attention from the scientific communities due to their versatility and biocompatibility. This study presents acoustic tweezers based on circular, slanted-finger Interdigital Transducers (CSFITs), which can steer the propagation direction of surface acoustic waves (SAWs) by tuning the excitation frequency. The CSFITs based acoustic tweezers enable dynamic and reconfigurable manipulation of micro-objects using multi-tone excitation signals. Compared to traditional Interdigital Transducers that generate and control SAWs along one axis, the CSFITs allow for simultaneously generating and independently controlling SAWs propagating along multiple axes by changing the frequency composition and the phase information in a multi-tone excitation signal. Moreover, the CSFITs based acoustic tweezers can be used for patterning cells/particles in various distributions and translating them along complex paths. We believe that our design is valuable for cellular-scale biological applications, in which on-chip, contactless, biocompatible handling of bioparticles is needed.

Michał Mańka - One of the best experts on this subject based on the ideXlab platform.

  • Elastic Interdigital Transducers for Lamb Wave Generations
    Solid State Phenomena, 2013
    Co-Authors: Michał Mańka, Adam Martowicz, Mateusz Rosiek, Tadeusz Uhl
    Abstract:

    During recent years structural health monitoring (SHM) systems have gained growing attention. Widely applied methods in SHM are methods based on the ultrasonic Lamb waves (LWs) which are also known as plate waves. LWs may be generated and sensed using different types of Transducers and their selection is essential for the SHM systems performance. Among Transducers used for generation and sensing of such waves, Interdigital Transducers (IDTs) are ones of the most promising types. Their main advantages are: mode selectivity, high excitation strength, wave directivity, small sizes and relatively low cost. In most cases IDTs are made of piezoceramics or piezoelectric polymers what makes them stiff and fragile. Contrary to the piezoceramic Transducers, the ones based on piezocomposites (i.e.: macro-fiber composite) are flexible with the comparable efficiency of piezoelectric effects. The MFC Transducers are usually optimized as actuators and they are not designed to any specific frequency. It appears, however, that sparse comb-like electrodes used in Interdigital Transducers create very interesting properties of mode selectivity. In the paper, after the introduction and short discussion about advantages and disadvantages of the IDTs, a novel type of the Interdigital transducer, based on elastic macro-fiber composite, is presented. Next, the results of the numerical and experimental tests of the MFC based IDT designed for the A0 mode excitation in a 4mm-thick aluminium plate is presented. In the final part of the paper advantages and disadvantages of the investigated transducer are discussed.

  • properties of Interdigital Transducers for lamb wave based shm systems
    Structural Health Monitoring-an International Journal, 2011
    Co-Authors: Michał Mańka, Adam Martowicz, Mateusz Rosiek, Tadeusz Uhl, Tadeusz Stepinski
    Abstract:

    Recently, an intensive research activity has been observed concerning the application of guided waves to long range ultrasound (LRUT) and structural health monitoring. Guided waves propagating in plates, known as Lamb waves, have appeared to be suitable for monitoring and condition evaluation of planar structures. Lamb waves can be generated using different types of actuators including piezoelectric or electromagnetic acoustic Transducers. In this paper a novel type of piezoelectric Transducers is presented based on macro-fiber piezocomposite (MFC). Contrary to the previously presented MFC Transducers the Transducers presented here are provided with Interdigital electrodes matched to certain wavelength. Two different designs of Interdigital Transducers (IDT) made of MFC substrate are presented in the paper together with the results of numerical simulations and experimental tests.

  • design and simulations of Interdigital Transducers for lamb wave based shm systems
    11th IMEKO TC 10 Workshop on Smart Diagnostics of Structures Kraków Polen, 2010
    Co-Authors: Michał Mańka, Adam Martowicz, Mateusz Rosiek, Tadeusz Uhl, Tadeusz Stepinski
    Abstract:

    Structural health monitoring systems have been constantly improved in the past decades. A complete system should consists of two main components: a network of sensors placed on monitored structure and a system of data analysis for its processing and interpretation. Sensors in a SHM system should be builtin to allow for continuous measurement in opposite to non destructive evaluation (NDE) methods where sensors are temporarily mounted on a structure only during measurements. One of the most promising type of the Transducers dedicated for SHM systems are Interdigital Transducers (IDT) which are designed for ultrasonic Lamb wave monitoring. Mode selectivity, excitation strength, wave directivity, size and relatively low cost are the most important advantages of IDT. In presented paper after a short introduction of Lamb waves and SHM systems, the advantages and disadvantages of IDT are discussed. Next, the main aspects of designing a narrow band IDT are presented. As an example of the designing process, a transducer used for the excitation of the first antisymmetric mode (A0) in a thick aluminum plate was chosen. To verify the properties of designed Transducers a FE model was built and then simulated in ANSYS Multiphysics software. In the final part of the paper obtained results are presented and discussed.

Putong Kang - One of the best experts on this subject based on the ideXlab platform.

  • Correction: Acoustic tweezers based on circular, slanted-finger Interdigital Transducers for dynamic manipulation of micro-objects.
    Lab on a chip, 2020
    Co-Authors: Putong Kang, Zhenhua Tian, Shujie Yang, Haodong Zhu, Hunter Bachman, Shuaiguo Zhao, Peiran Zhang, Zeyu Wang, Ruoyu Zhong
    Abstract:

    Correction for 'Acoustic tweezers based on circular, slanted-finger Interdigital Transducers for dynamic manipulation of micro-objects' by Putong Kang et al., Lab Chip, 2020, 20, 987-994, DOI: .

  • acoustic tweezers based on circular slanted finger Interdigital Transducers for dynamic manipulation of micro objects
    Lab on a Chip, 2020
    Co-Authors: Putong Kang, Zhenhua Tian, Shujie Yang, Haodong Zhu, Hunter Bachman, Shuaiguo Zhao, Peiran Zhang, Zeyu Wang, Ruoyu Zhong, Tony Jun Huang
    Abstract:

    Acoustic tweezing technologies are gaining significant attention from the scientific communities due to their versatility and biocompatibility. This study presents acoustic tweezers based on circular, slanted-finger Interdigital Transducers (CSFITs), which can steer the propagation direction of surface acoustic waves (SAWs) by tuning the excitation frequency. The CSFITs based acoustic tweezers enable dynamic and reconfigurable manipulation of micro-objects using multi-tone excitation signals. Compared to traditional Interdigital Transducers that generate and control SAWs along one axis, the CSFITs allow for simultaneously generating and independently controlling SAWs propagating along multiple axes by changing the frequency composition and the phase information in a multi-tone excitation signal. Moreover, the CSFITs based acoustic tweezers can be used for patterning cells/particles in various distributions and translating them along complex paths. We believe that our design is valuable for cellular-scale biological applications, in which on-chip, contactless, biocompatible handling of bioparticles is needed.

Tadeusz Uhl - One of the best experts on this subject based on the ideXlab platform.

  • Elastic Interdigital Transducers for Lamb Wave Generations
    Solid State Phenomena, 2013
    Co-Authors: Michał Mańka, Adam Martowicz, Mateusz Rosiek, Tadeusz Uhl
    Abstract:

    During recent years structural health monitoring (SHM) systems have gained growing attention. Widely applied methods in SHM are methods based on the ultrasonic Lamb waves (LWs) which are also known as plate waves. LWs may be generated and sensed using different types of Transducers and their selection is essential for the SHM systems performance. Among Transducers used for generation and sensing of such waves, Interdigital Transducers (IDTs) are ones of the most promising types. Their main advantages are: mode selectivity, high excitation strength, wave directivity, small sizes and relatively low cost. In most cases IDTs are made of piezoceramics or piezoelectric polymers what makes them stiff and fragile. Contrary to the piezoceramic Transducers, the ones based on piezocomposites (i.e.: macro-fiber composite) are flexible with the comparable efficiency of piezoelectric effects. The MFC Transducers are usually optimized as actuators and they are not designed to any specific frequency. It appears, however, that sparse comb-like electrodes used in Interdigital Transducers create very interesting properties of mode selectivity. In the paper, after the introduction and short discussion about advantages and disadvantages of the IDTs, a novel type of the Interdigital transducer, based on elastic macro-fiber composite, is presented. Next, the results of the numerical and experimental tests of the MFC based IDT designed for the A0 mode excitation in a 4mm-thick aluminium plate is presented. In the final part of the paper advantages and disadvantages of the investigated transducer are discussed.

  • properties of Interdigital Transducers for lamb wave based shm systems
    Structural Health Monitoring-an International Journal, 2011
    Co-Authors: Michał Mańka, Adam Martowicz, Mateusz Rosiek, Tadeusz Uhl, Tadeusz Stepinski
    Abstract:

    Recently, an intensive research activity has been observed concerning the application of guided waves to long range ultrasound (LRUT) and structural health monitoring. Guided waves propagating in plates, known as Lamb waves, have appeared to be suitable for monitoring and condition evaluation of planar structures. Lamb waves can be generated using different types of actuators including piezoelectric or electromagnetic acoustic Transducers. In this paper a novel type of piezoelectric Transducers is presented based on macro-fiber piezocomposite (MFC). Contrary to the previously presented MFC Transducers the Transducers presented here are provided with Interdigital electrodes matched to certain wavelength. Two different designs of Interdigital Transducers (IDT) made of MFC substrate are presented in the paper together with the results of numerical simulations and experimental tests.

  • design and simulations of Interdigital Transducers for lamb wave based shm systems
    11th IMEKO TC 10 Workshop on Smart Diagnostics of Structures Kraków Polen, 2010
    Co-Authors: Michał Mańka, Adam Martowicz, Mateusz Rosiek, Tadeusz Uhl, Tadeusz Stepinski
    Abstract:

    Structural health monitoring systems have been constantly improved in the past decades. A complete system should consists of two main components: a network of sensors placed on monitored structure and a system of data analysis for its processing and interpretation. Sensors in a SHM system should be builtin to allow for continuous measurement in opposite to non destructive evaluation (NDE) methods where sensors are temporarily mounted on a structure only during measurements. One of the most promising type of the Transducers dedicated for SHM systems are Interdigital Transducers (IDT) which are designed for ultrasonic Lamb wave monitoring. Mode selectivity, excitation strength, wave directivity, size and relatively low cost are the most important advantages of IDT. In presented paper after a short introduction of Lamb waves and SHM systems, the advantages and disadvantages of IDT are discussed. Next, the main aspects of designing a narrow band IDT are presented. As an example of the designing process, a transducer used for the excitation of the first antisymmetric mode (A0) in a thick aluminum plate was chosen. To verify the properties of designed Transducers a FE model was built and then simulated in ANSYS Multiphysics software. In the final part of the paper obtained results are presented and discussed.