scholarly journals Polymeric foams for flexible and highly sensitive low-pressure capacitive sensors

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Mickaël Pruvost ◽  
Wilbert J. Smit ◽  
Cécile Monteux ◽  
Philippe Poulin ◽  
Annie Colin
Keyword(s):  
Low Pressure ◽  
Capacitive Sensors ◽  
Polymeric Foams ◽  
Highly Sensitive

An Evaluation Method of Brownian Noise in Highly Sensitive Capacitive Sensors

2015 ◽  
Vol 135 (4) ◽  
pp. 142-143 ◽  
Author(s):  
Daisuke Yamane ◽  
Toshifumi Konishi ◽  
Takaaki Matsushima ◽  
Shota Kamei ◽  
Kazuya Masu ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Capacitive Sensors ◽  
Brownian Noise ◽  
Highly Sensitive

The Effect of Humidity on the Stability of LTCC Pressure Sensors

2012 ◽  
Vol 19 (1) ◽  
pp. 133-140 ◽  
Author(s):  
Marina Zarnik ◽  
Darko Belavic
Keyword(s):  
Pressure Sensors ◽  
Low Pressure ◽  
Numerical Analyses ◽  
Capacitive Sensors ◽  
Differential Mode ◽  
Piezoresistive Sensors ◽  
Mode Of Operation ◽  
The Stability

The Effect of Humidity on the Stability of LTCC Pressure SensorsLTCC-based pressure sensors are promising candidates for wet-wet applications in which the effect of the surrounding media on the sensor's characteristics is of key importance. The effect of humidity on the sensor's stability can be a problem, particularly in the case of capacitive sensors. A differential mode of operation can be a good solution, but manufacturing the appropriate sensing capacitors remains a major challenge. In the case of piezoresistive sensors the influence of humidity is less critical, but it still should be considered as an important parameter when designing sensors for low-pressure ranges. In this paper we discuss the stability of the sensors' offset characteristics, which was inspected closely using experimental and numerical analyses.

scholarly journals Detection of Formaldehyde in Flames Using UV and MIR Absorption Spectroscopy

2015 ◽  
Vol 229 (4) ◽  
Author(s):  
Patrick Nau ◽  
Julia Koppmann ◽  
Alexander Lackner ◽  
Andreas Brockhinke
Keyword(s):  
Comparative Study ◽  
Dimethyl Ether ◽  
Absorption Spectroscopy ◽  
Spectral Region ◽  
Low Pressure ◽  
Cavity Ring Down Spectroscopy ◽  
Mid Infrared ◽  
Highly Sensitive ◽  
Absorption Technique ◽  
Cavity Ring Down

AbstractAbsorption spectroscopy in the ultraviolet (UV) and mid-infrared (MIR) spectral region has been used in a comparative study for the detection of formaldehyde in laminar low pressure flames of dimethyl ether (DME) and methane. Both spectral regions were tested to explore respective advantages and limitations, especially for the detection of stable molecules in flames. In the UV, cavity ring-down spectroscopy (CRDS), a highly sensitive multi-pass absorption technique, has been used for the detection of formaldehyde in the

3D printed stretchable capacitive sensors for highly sensitive tactile and electrochemical sensing

2018 ◽  
Vol 29 (18) ◽  
pp. 185501 ◽  
Author(s):  
Kai Li ◽  
Hong Wei ◽  
Wenguang Liu ◽  
Hong Meng ◽  
Peixin Zhang ◽  
...  
Keyword(s):  
Electrochemical Sensing ◽  
Capacitive Sensors ◽  
Highly Sensitive ◽  
3D Printed

Organic Substrate Technologies for Fingerprint Sensors

2019 ◽  
Vol 2019 (DPC) ◽  
pp. 001082-001094
Author(s):  
Shengmin Wen
Keyword(s):  
Performance Evaluation ◽  
Manufacturing Process ◽  
Low Cost ◽  
Organic Substrate ◽  
Capacitive Sensors ◽  
Sensing Element ◽  
Photosensitive Material ◽  
Highly Sensitive ◽  
And Performance ◽  
Security Application

Fingerprint sensor had a long history. With the mobile electronics security application being ushered in several years back, miniature and low-cost capacitive fingerprint sensors enjoyed an explosion growth. One technology to make such a low-cost, highly sensitive, high environment tolerating and reliable technology is to use organic substrate to construct sensing element. In this paper, several technologies are reviewed. They include Si based absolute capacitive sensors, film-based transcapacitive technology, organic substrate-based transcapacitive technology. To make highly sensitive substrate sensor, a newly invented architecture has been achieved with new photosensitive material in combination with traditional substrate manufacturing process, resulting the best performance at very low cost. Detailed manufacturing process and performance evaluation results will be presented.

scholarly journals Highly Sensitive and Durable Structured Fibre Sensors for Low-Pressure Measurement in Smart Skin

Sensors ◽  
2019 ◽  
Vol 19 (8) ◽  
pp. 1811 ◽  
Author(s):  
Bao Yang ◽  
Su Liu ◽  
Xi Wang ◽  
Rong Yin ◽  
Ying Xiong ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Precise Measurement ◽  
Axial Strain ◽  
Applied Pressure ◽  
Three Dimensional ◽  
High Sensitivity ◽  
Low Pressure ◽  
High Durability ◽  
Highly Sensitive ◽  
Smart Skin

Precise measurements of low pressure are highly necessary for many applications. This study developed novel structured fibre sensors embedded in silicone, forming smart skin with high sensitivity, high durability, and good immunity to crosstalk for precise measurement of pressure below 10 kPa. The transduction principle is that an applied pressure leads to bending and stretching of silicone and optical fibre over a purposely made groove and induces the axial strain in the gratings. The fabricated sensor showed high pressure sensitivity up to 26.8 pm/kPa and experienced over 1,000,000 cycles compression without obvious variation. A theoretical model of the sensor was presented and verified to have excellent agreement with experimental results. The prototype of smart leg mannequin and wrist pulse measurements indicated that such optical sensors can precisely measure low-pressure and can easily be integrated for smart skins for mapping low pressure on three-dimensional surfaces.

Ovarian Dysfunction in Fetally Irradiated Beagles

1977 ◽  
Vol 35 ◽  
pp. 658-659
Author(s):  
T. M. Seed ◽  
M. H. Sanderson ◽  
D. L. Gutzeit ◽  
T. E. Fritz ◽  
D. V. Tolle ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Low Dose ◽  
Long Term Effects ◽  
Ovarian Dysfunction ◽  
Dose Rates ◽  
Highly Sensitive ◽  
Microscopic Evaluation ◽  
Ovarian Pathology ◽  
Normal Offspring

The developing mammalian fetus is thought to be highly sensitive to ionizing radiation. However, dose, dose-rate relationships are not well established, especially the long term effects of protracted, low-dose exposure. A previous report (1) has indicated that bred beagle bitches exposed to daily doses of 5 to 35 R 60Co gamma rays throughout gestation can produce viable, seemingly normal offspring. Puppies irradiated in utero are distinguishable from controls only by their smaller size, dental abnormalities, and, in adulthood, by their inability to bear young.We report here our preliminary microscopic evaluation of ovarian pathology in young pups continuously irradiated throughout gestation at daily (22 h/day) dose rates of either 0.4, 1.0, 2.5, or 5.0 R/day of gamma rays from an attenuated 60Co source. Pups from non-irradiated bitches served as controls. Experimental animals were evaluated clinically and hematologically (control + 5.0 R/day pups) at regular intervals.

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