---
_id: '9574'
abstract:
- lang: eng
  text: For devices having non-linear contact, load plays a fundamental role. Variations
    in the characteristics of the load cause change in eigenfrequency and amplitude
    of the vibration. In most technical applications, this unwanted behaviour is cancelled
    by the use of control algorithms. However, multiple applications, like bond quality
    monitoring or chemical and pressure sensors, have found that the load may be characterised
    by interpreting the change in characteristics of a resonant vibrating device used
    as a sensor. Surgical resection of tumours is a very difficult task. After localising
    the tumour by the use of imaging techniques, the resection demands the surgeon
    to decide where and what to resect based on visual and tactile differentiation
    of tumour and healthy tissue. Exactness of this process could be enhanced if we
    can provide the surgeon with a device capable of evaluating mechanical characteristics
    of the tissue much more accurately than the surgeon himself can do. As the mechanical
    characteristics of tumour and healthy tissue differ but slightly, the task is
    to design a system with high sensitivity. Therefore, we have developed a resonant
    actuator-sensor that allows the differentiation among distinct media that have
    similar mechanical characteristics to tumour and healthy tissue using a piezoelectric
    bimorph. The design is based on the detection and evaluation of frequency shift
    and amplitude variation of the fundamental and higher harmonics using one layer
    for the resonant excitation of vibration and the other one as the sensing element.
author:
- first_name: Ralf
  full_name: Stroop, Ralf
  last_name: Stroop
- first_name: David Oliva
  full_name: Uribe, David Oliva
  last_name: Uribe
- first_name: Melisa Orta
  full_name: Martinez, Melisa Orta
  last_name: Martinez
- first_name: Michael
  full_name: Brökelmann, Michael
  last_name: Brökelmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Jörg
  full_name: Wallaschek, Jörg
  last_name: Wallaschek
citation:
  ama: Stroop R, Uribe DO, Martinez MO, Brökelmann M, Hemsel T, Wallaschek J. Tactile
    tissue characterisation by piezoelectric systems. <i>Journal of Electroceramics</i>.
    2008;20(3-4):237-241. doi:<a href="https://doi.org/10.1007/s10832-007-9183-6">10.1007/s10832-007-9183-6</a>
  apa: Stroop, R., Uribe, D. O., Martinez, M. O., Brökelmann, M., Hemsel, T., &#38;
    Wallaschek, J. (2008). Tactile tissue characterisation by piezoelectric systems.
    <i>Journal of Electroceramics</i>, <i>20</i>(3–4), 237–241. <a href="https://doi.org/10.1007/s10832-007-9183-6">https://doi.org/10.1007/s10832-007-9183-6</a>
  bibtex: '@article{Stroop_Uribe_Martinez_Brökelmann_Hemsel_Wallaschek_2008, title={Tactile
    tissue characterisation by piezoelectric systems}, volume={20}, DOI={<a href="https://doi.org/10.1007/s10832-007-9183-6">10.1007/s10832-007-9183-6</a>},
    number={3–4}, journal={Journal of Electroceramics}, publisher={Springer US}, author={Stroop,
    Ralf and Uribe, David Oliva and Martinez, Melisa Orta and Brökelmann, Michael
    and Hemsel, Tobias and Wallaschek, Jörg}, year={2008}, pages={237–241} }'
  chicago: 'Stroop, Ralf, David Oliva Uribe, Melisa Orta Martinez, Michael Brökelmann,
    Tobias Hemsel, and Jörg Wallaschek. “Tactile Tissue Characterisation by Piezoelectric
    Systems.” <i>Journal of Electroceramics</i> 20, no. 3–4 (2008): 237–41. <a href="https://doi.org/10.1007/s10832-007-9183-6">https://doi.org/10.1007/s10832-007-9183-6</a>.'
  ieee: R. Stroop, D. O. Uribe, M. O. Martinez, M. Brökelmann, T. Hemsel, and J. Wallaschek,
    “Tactile tissue characterisation by piezoelectric systems,” <i>Journal of Electroceramics</i>,
    vol. 20, no. 3–4, pp. 237–241, 2008.
  mla: Stroop, Ralf, et al. “Tactile Tissue Characterisation by Piezoelectric Systems.”
    <i>Journal of Electroceramics</i>, vol. 20, no. 3–4, Springer US, 2008, pp. 237–41,
    doi:<a href="https://doi.org/10.1007/s10832-007-9183-6">10.1007/s10832-007-9183-6</a>.
  short: R. Stroop, D.O. Uribe, M.O. Martinez, M. Brökelmann, T. Hemsel, J. Wallaschek,
    Journal of Electroceramics 20 (2008) 237–241.
date_created: 2019-04-29T12:50:44Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '151'
doi: 10.1007/s10832-007-9183-6
intvolume: '        20'
issue: 3-4
keyword:
- Piezo ceramics
- Bimorph
- Tactile sensor
- Tumour tissue
language:
- iso: eng
page: 237-241
publication: Journal of Electroceramics
publication_identifier:
  issn:
  - 1385-3449
publisher: Springer US
quality_controlled: '1'
status: public
title: Tactile tissue characterisation by piezoelectric systems
type: journal_article
user_id: '55222'
volume: 20
year: '2008'
...
---
_id: '9576'
abstract:
- lang: eng
  text: 'In neurosurgery, delineation of tumor boundaries during resection of brain
    tumors is of substantial relevance. During operation distinction between tumor
    and healthy tissue rely on the abilities of the surgeon based on visual and tactile
    differentiation. In this paper a high sensitivity actuator-sensor system using
    a piezoelectric bimorph is presented. Frequency shift and transfer function of
    the bimorphpsilas voltages are detected and evaluated. Sensorpsilas sensitivity
    is evaluated using two frequency controls strategies: A phase-locked loop (PLL)
    and a self-oscillating circuit. Results of measurements conducted on gel-phantoms
    are presented and discussed.'
author:
- first_name: David Oliva
  full_name: Uribe, David Oliva
  last_name: Uribe
- first_name: Ralf
  full_name: Stroop, Ralf
  last_name: Stroop
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Jörg
  full_name: Wallaschek, Jörg
  last_name: Wallaschek
citation:
  ama: 'Uribe DO, Stroop R, Hemsel T, Wallaschek J. Development of a biomedical tissue
    differentiation system using piezoelectric actuators. In: <i>Frequency Control
    Symposium, 2008 IEEE International</i>. ; 2008:91-94. doi:<a href="https://doi.org/10.1109/FREQ.2008.4622963">10.1109/FREQ.2008.4622963</a>'
  apa: Uribe, D. O., Stroop, R., Hemsel, T., &#38; Wallaschek, J. (2008). Development
    of a biomedical tissue differentiation system using piezoelectric actuators. In
    <i>Frequency Control Symposium, 2008 IEEE International</i> (pp. 91–94). <a href="https://doi.org/10.1109/FREQ.2008.4622963">https://doi.org/10.1109/FREQ.2008.4622963</a>
  bibtex: '@inproceedings{Uribe_Stroop_Hemsel_Wallaschek_2008, title={Development
    of a biomedical tissue differentiation system using piezoelectric actuators},
    DOI={<a href="https://doi.org/10.1109/FREQ.2008.4622963">10.1109/FREQ.2008.4622963</a>},
    booktitle={Frequency Control Symposium, 2008 IEEE International}, author={Uribe,
    David Oliva and Stroop, Ralf and Hemsel, Tobias and Wallaschek, Jörg}, year={2008},
    pages={91–94} }'
  chicago: Uribe, David Oliva, Ralf Stroop, Tobias Hemsel, and Jörg Wallaschek. “Development
    of a Biomedical Tissue Differentiation System Using Piezoelectric Actuators.”
    In <i>Frequency Control Symposium, 2008 IEEE International</i>, 91–94, 2008. <a
    href="https://doi.org/10.1109/FREQ.2008.4622963">https://doi.org/10.1109/FREQ.2008.4622963</a>.
  ieee: D. O. Uribe, R. Stroop, T. Hemsel, and J. Wallaschek, “Development of a biomedical
    tissue differentiation system using piezoelectric actuators,” in <i>Frequency
    Control Symposium, 2008 IEEE International</i>, 2008, pp. 91–94.
  mla: Uribe, David Oliva, et al. “Development of a Biomedical Tissue Differentiation
    System Using Piezoelectric Actuators.” <i>Frequency Control Symposium, 2008 IEEE
    International</i>, 2008, pp. 91–94, doi:<a href="https://doi.org/10.1109/FREQ.2008.4622963">10.1109/FREQ.2008.4622963</a>.
  short: 'D.O. Uribe, R. Stroop, T. Hemsel, J. Wallaschek, in: Frequency Control Symposium,
    2008 IEEE International, 2008, pp. 91–94.'
date_created: 2019-04-29T13:07:39Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '151'
doi: 10.1109/FREQ.2008.4622963
keyword:
- biomedical measurement
- brain
- cancer
- neurophysiology
- phantoms
- phase locked loops
- piezoelectric actuators
- surgery
- tactile sensors
- transfer functions
- tumours
- PLL
- biomedical tissue differentiation system
- brain tumor resection
- frequency control
- frequency shift
- gel-phantom
- high sensitivity actuator-sensor system
- neurosurgery
- phase-locked loop
- piezoelectric actuators
- piezoelectric bimorph
- self-oscillating circuit
- sensor sensitivity
- tactile differentiation
- tactile sensor system
- transfer function
- tumor boundary
- visual differentiation
- Biomedical measurements
- Circuits
- Frequency control
- Neoplasms
- Neurosurgery
- Phase locked loops
- Piezoelectric actuators
- Surges
- Transfer functions
- Voltage
language:
- iso: eng
page: 91-94
publication: Frequency Control Symposium, 2008 IEEE International
publication_identifier:
  issn:
  - 1075-6787
quality_controlled: '1'
status: public
title: Development of a biomedical tissue differentiation system using piezoelectric
  actuators
type: conference
user_id: '55222'
year: '2008'
...