Novel ultrasound read-out for a wireless implantable passive strain sensor (WIPSS)

Gattiker, F.; Umbrecht, F.; Neuenschwander, J.; Sennhauser, U.; Hierold, C.

doi:10.1016/j.sna.2007.09.003

Cited by 27 publications

(21 citation statements)

References 15 publications

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“…9 a fabricated readout display of the WIPSS is shown (α = 0 for all factors, with pressure adjusted to bonding area). It consists of two identical spiral shaped micro channels at different planes, namely the calibration channel and the measurement channel (see [3] for detailed information about the read-out principle). Each micro channel has the following dimension: depth ca.…”

Section: Resultsmentioning

confidence: 99%

“…As the reservoir is exposed to strain, its volume changes and consequently the fill level inside the micro channel varies. The wireless determination of the micro channel's strain dependent fill level is based on a novel ultrasound read-out [2,3]. After the fabrication process the knowledge of the micro channel's depth is essential for the WIPSS' readout by ultrasound.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Solvent assisted bonding of polymethylmethacrylate: Characterization using the response surface methodology

Umbrecht

Müller

Gattiker

et al. 2009

Sensors and Actuators A: Physical

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This work presents the investigation of a solvent assisted bonding process developed for the fabrication of closed micro channels made from polymethylmethacrylate (PMMA). The effects of four processing parameters on the deformation and the bond strength of the micro channel have been investigated using the response surface methodology (RSM). High bond strengths (3.5 ± 0.8 MPa) at low deformations (1.6 ± 0.3 %) have been achieved at the center point of the design of experiment.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solvent assisted bonding of polymethylmethacrylate: Characterization using the response surface methodology

Umbrecht

Müller

Gattiker

et al. 2009

Sensors and Actuators A: Physical

Self Cite

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“…The voltage waveforms are then digitised by means of a data acquisition board (NI PCI-5122) with a sampling frequency of 2.5 MHz and 14 bits resolution, the generated A-scans being stored for each scanned position x, y. The equipment is controlled with a modified version of a LabVIEW Ò (NI) software previously used for immersion technique measurements (Gattiker et al 2007).…”

Section: Experimental Set-upmentioning

confidence: 99%

Air-coupled ultrasound as an accurate and reproducible method for bonding assessment of glued timber

et al. 2010

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Glued timber products are widely used in construction; therefore, it is necessary to develop non-destructive bonding quality assessment methods for longterm structural health monitoring. Air-coupled ultrasound (ACU) inspection is a novel technique, with phenomenal improvements in reproducibility compared to traditional contact ultrasonics, unlimited scanning possibilities, and a high potential for delamination detection in wood products. As part of an ongoing project, glued timber samples of 10 mm thickness with artificial glue line defects were inspected. A normal through-transmission setup with 120 kHz transducers allowed for successful and accurate imaging of the geometry of glued and non-glued areas in all inspected objects. The influence of wood heterogeneity and the reproducibility of ACU amplitude measurements were analysed in detail, identifying the main sources of variation. Future work is planned for the inspection of more complex glued timber objects.

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“…6 A typical lab-on-a-chip device consist of various microfluidic components such as valves, 7 pumps, 8 mixers, 9, 10 reactors, 11 sensors, 12 sorters 13 and microchannels. 14 Typical microfluidic functions include sample reaction, particle separation and detection.…”

Section: Introductionmentioning

confidence: 99%

Stability of flowing open fluidic channels

2013

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Open fluidic systems have a distinct advantage over enclosed channels in that the fluids exposed nature makes for easy external interaction, this finds uses in introduction of samples by adding liquid droplets or from the surrounding gaseous medium. This work investigates flowing open channels and films, which can potentially make use of the open section of the system as an external interface, before bringing the sample into an enclosed channel. Clearly, in this scenario a key factor is the stability of the flowing open fluid. The open channels investigated include a straight open channel defined by a narrow strip of solid surface, the edges of which allow large contact angle hysteresis, and a wider structure allowing for multiple inputs and outputs. A model is developed for fluid flow, and the findings used to describe the process of failure in both cases.

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Novel ultrasound read-out for a wireless implantable passive strain sensor (WIPSS)

Cited by 27 publications

References 15 publications

Solvent assisted bonding of polymethylmethacrylate: Characterization using the response surface methodology

Solvent assisted bonding of polymethylmethacrylate: Characterization using the response surface methodology

Air-coupled ultrasound as an accurate and reproducible method for bonding assessment of glued timber

Stability of flowing open fluidic channels

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