Search results for "Tuning fork"

showing 3 items of 3 documents

Recent improvements on micro-thermocouple based SThM

2017

The scanning thermal microscope (SThM) has become a versatile tool for local surface temperature mapping or measuring thermal properties of solid materials. In this article, we present recent improvements in a SThM system, based on a micro-wire thermocouple probe associated with a quartz tuning fork for contact strength detection. Some results obtained on an electrothermal micro-hotplate device, operated in active and passive modes, allow demonstrating its performance as a coupled force detection and thermal measurement system.

010302 applied physicsHistoryMicroscopeMaterials scienceSystem of measurementQuartz tuning forkNanotechnologyContact strength02 engineering and technologySolid material021001 nanoscience & nanotechnology01 natural sciencesComputer Science ApplicationsEducationlaw.inventionThermocouplelaw0103 physical sciencesThermal0210 nano-technologyTemperature mappingJournal of Physics: Conference Series
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Vibration Detector Based on GMR Sensors

2009

Up to now, vibrations have mostly been sensed by measuring displacement, velocity, and acceleration. The most common types of vibration sensors are piezoelectric, capacitive, null-balance, strain gage, optoelectronic, resonance beam, and piezoresistive. We present a low-cost and low-power vibration detector based on the measurement of magnetic field variations induced in a recent SS501 giant magnetoresistance (GMR) magnetic sensor, for which has never been applied. Vibrations on small ferromagnetic pieces disturb the Earth's magnetic field. These weak perturbations can be detected and measured over the assumed constant Earth's magnetic field, which is uniform over a wide area. A novel array…

Physicsbusiness.industryCapacitive sensingAcousticsDetectorElectrical engineeringMusical instrumentGiant magnetoresistancePiezoresistive effectMagnetic fieldlaw.inventionVibrationlawElectrical and Electronic EngineeringTuning forkbusinessInstrumentationIEEE Transactions on Instrumentation and Measurement
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Application of Tuning Fork Sensors for In-situ Studies of Dynamic Force Interactions Inside Scanning and Transmission Electron Microscopes

2012

Mechanical properties of nanoscale contacts have been probed in-situ by specially developed force sensor based on a quartz tuning fork resonator (TF). Additional control is provided by observation of process in scanning electron microscope (SEM) and transmission electron microscope (TEM). A piezoelectric manipulator allows precise positioning of atomic force microscope (AFM) probe in contact with another electrode and recording of the TF oscillation amplitude and phase while simultaneously visualizing the contact area in electron microscope. Electrostatic control of interaction between the electrodes is demonstrated during observation of the experiment in SEM. In the TEM system the TF senso…

lcsh:TN1-997Scanning Hall probe microscopeMaterials scienceScanning electron microscopebusiness.industryfrictiontuning forknanomechanicslaw.inventionNEMSOpticslawMicroscopymicroscopyGeneral Materials ScienceScanning tunneling microscopeElectron microscopeTuning forkbusinessContact areaNon-contact atomic force microscopylcsh:Mining engineering. MetallurgyMaterials Science
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