Results 201 to 210 of about 7,101 (242)

Clamp-type quartz tuning fork enhanced photoacoustic spectroscopy

Optics Letters, 2022
In this Letter, clamp-type quartz tuning fork enhanced photoacoustic spectroscopy (Clamp-type QEPAS) is proposed and realized through the design, realization, and testing of clamp-type quartz tuning forks (QTFs) for photoacoustic gas sensing. The clamp-type QTF provides a wavefront-shaped aperture with a diameter up to 1 mm, while keeping Q factors >
Qian Wu, Haohua Lv, Leqing Lin, Hongpeng Wu, Marilena Giglio, Wenguo Zhu, Yongchun Zhong, Angelo Sampaolo, Pietro Patimisco, Lei Dong, Vincenzo Spagnolo, Jianhui Yu, Huadan Zheng   +12 more
openaire   +3 more sources

Quartz Tuning Fork in Helium

Journal of Low Temperature Physics, 2007
Use of a quartz tuning fork for precise measurements of density has been studied in normal 3He liquid and in 4He liquid and vapor, spanning a reasonably wide range of fluid densities. It is evident that the compressibility of the fluid must be accounted for in order to properly interpret the resonator response.
E. M. Pentti, J. T. Tuoriniemi, A. J. Salmela, A. P. Sebedash   +3 more
openaire   +1 more source

Quartz tuning fork based microwave impedance microscopy

Review of Scientific Instruments, 2016
Microwave impedance microscopy (MIM), a near-field microwave scanning probe technique, has become a powerful tool to characterize local electrical responses in solid state samples. We present the design of a new type of MIM sensor based on quartz tuning fork and electrochemically etched thin metal wires. Due to a higher aspect ratio tip and integration
Yong-Tao Cui, Eric Yue Ma, Zhi-Xun Shen
openaire   +2 more sources

Quartz-Crystal Tuning-Fork Tactile Sensor

Japanese Journal of Applied Physics, 1999
Sensing behavior of a quartz-crystal tuning-fork tactile sensor was tested using several types of materials (metals and slide glass) and several sheets of sandpaper of different roughnesses fixed on copper or aluminum plates with acrylic resin paste.
Hideaki Itoh, Masataka Nomura, Naoya Katakura   +2 more
openaire   +1 more source

Double-ended Tuning Fork Quartz Accelerometer

40th Annual Symposium on Frequency Control, 1986
Quartz accelerometers with frequency output have been designed and built using etched double-ended tuning fork technology. These devices consist of two tuning forks connected in a cantilever beam configuration with beryllium-copper spacers which serves as a proof mass and inboard spacer.
W.J. Kass, G.S. Snow
openaire   +1 more source

Quartz crystal tuning fork photoacoustic point sensing

Sensors and Actuators B: Chemical, 2010
Abstract Achieving chemical specificity in trace detection of small molecules is a challenge. Here we describe a highly selective method for detection of trace chemicals using photoacoustic spectroscopy of adsorbed molecules on a quartz crystal tuning fork.
Charles W. Van Neste, Marissa E. Morales-Rodríguez, Larry R. Senesac, Satish M. Mahajan, Thomas Thundat   +4 more
openaire   +1 more source

Quartz Tuning Fork Viscometers for Helium Liquids

Journal of Low Temperature Physics, 2004
Mechanical resonators, in the form of vibrating wires or torsional oscillators, have long been employed as sensors in liquid 3He and 3He–4He mixtures. The damping of resonators is due to the viscosity of the surrounding liquid which is a strong, well-known function of temperature for bulk Fermi liquids.
D. O. Clubb, O. V. L. Buu, R. M. Bowley, R. Nyman, J. R. Owers-Bradley   +4 more
openaire   +1 more source

Calibration of quartz tuning fork temperature sensors

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications, 2008
This paper presents the results from investigations of thermal sensitivity, thermal response time and long-term stability of a newly miniaturized design of thermal sensitive quartz tuning fork resonator working at flexural mode with ZY-cut at fundamental frequency of 32 kHz. Special attention is given to the methodology and equipment for calibration of
Jun Xu, Bo You, Hong-jun Wang, Jing Ma
openaire   +1 more source

Development of quartz tuning fork temperature sensors

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications, 2008
A temperature sensing technique taking thermal sensitive quartz tuning fork vibration arm as sensitive components and output of digital frequency is presented. In the design of quartz tuning fork temperature sensor, selecting the cut type of quartz tuning fork according to the each anisotropic nature of quartz tuning fork, so that there is a linear ...
Jun Xu, Bo You, Xue-fei Zhao, Xin Li
openaire   +1 more source

Quartz Tuning Forks as Cryogenic Vacuum Gauges

Journal of Low Temperature Physics, 2014
We report measurements of the mechanical $$Q$$ of a 32.7 kHz quartz tuning fork as a function of pressure for helium and argon at T  $
F. M. Huisman, A. E. Velasco, E. Van Cleve, P. Taborek   +3 more
openaire   +1 more source