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Now showing items 11-20 of 22
Portable low cost ultrasound imaging system
(IEEE, 2016)
The applications of ultrasound in medicine have been increasing in the last decade either in diagnostics or in treatments. Ultrasound is routinely used in clinical examinations, such as pregnancy exams. On the other hand, ...
Signal to noise ratio optimization for a CMUT based medical ultrasound imaging system
(IEEE, 2015)
CMUTs offers key performance benefits compared to their piezoelectric counterparts. However, CMUTs are not widely adopted in commercial ultrasound imaging systems due to low signal to noise ratio (SNR) in the obtained ...
A prism-based non-linear optical readout method for MEMS cantilever arrays
(Elsevier, 2016-10-15)
This paper demonstrates the use of a single right-angle prism for the optical readout of micro-electro-mechanical systems (MEMS) cantilever arrays. The non-linear reflectivity arisen from the internal reflection at the ...
Two cantilever based sytem for viscosity and density monitoring
(IEEE, 2015)
Viscosity and density measurements in liquids in real-time is challenging. Previous MEMS based approaches use frequency sweeps for the purpose and those methods are slow and not real-time. We show that high precision ...
Receive-noise analysis of capacitive micromachined ultrasonic transducers
(IEEE, 2016)
This paper presents an analysis of thermal (Johnson) noise received from the radiation medium by otherwise noiseless capacitive micromachined ultrasonic transducer (CMUT) membranes operating in their fundamental resonance ...
Disposable cartridge biosensor platform for portable diagnostics
(SPIE , 2017)
We developed two types of cantilever-based biosensors for portable diagnostics applications. One sensor is based on MEMS cantilever chip mounted in a microfluidic channel and the other sensor is based on a movable optical ...
Optical fiber array based simultaneous parallel monitoring of resonant cantilever sensors in liquid
(Elsevier, 2016-05-01)
This paper reports a novel method for simultaneous resonance monitoring of MEMS cantilevers using phase based dynamic measurements without any electrical connections to the sensor array. MEMS cantilevers are made of ...
MEMS cantilever sensor array oscillators: Theory and experiments
(Elsevier, 2016-01-01)
This paper demonstrates that an array of cantilever sensors can be operated simultaneously at resonance using a single actuator and a single photodetector. Self-sustained oscillations (SSOs) of cantilevers can be achieved ...
Analysis of vibratory gyroscopes: drive and sense mode resonance shift by coriolis force
(IEEE, 2017)
In this paper, we demonstrate the analysis of coupling between drive and sense systems of vibratory gyroscopes. Vibratory gyroscopes have attracted a lot of interest recently with the development of MEMS gyroscopes. These ...
A cartridge based sensor array platform for multiple coagulation measurements from plasma
(Royal Society of Chemistry, 2015)
This paper proposes a MEMS-based sensor array enabling multiple clot-time tests for plasma in one disposable microfluidic cartridge. The versatile LoC (Lab-on-Chip) platform technology is demonstrated here for real-time ...
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