ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Electroactive Pressure Sensors for Smart Structures (2008)

Martínez, Fernando ; Tynan, E. ; Arregui, M. ; [et al.]

s.l. ; Stafa-Zurich, Switzerland

Advances in science and technology Vol. 56 (Sept. 2008), p. 122-126

add to mindlist on the mindlist

Details

ISSN: 1662-0356

Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008

Topics: Natural Sciences in General , Technology

Notes: A hardware-software interface for smart electroactive pressure sensors has been designedwith the objective of providing a low power consumption and high performance impact monitoringsystem, integrated in new smart structures. The interface is specifically designed for its use withdistributed pressure sensors based on conductive polymers. Their low cost and flexibility makethem suitable for placing on large surfaces. The smart sensor integrates a microprocessor, a radiochip and a complete analog front end based on a period-modulated oscillator. The softwaredeveloped implements new interface applications for this hardware in TinyOS. The response of thesensor, both loading and unloading, to different impact energies first, and then to different probestiffness is presented. The behaviour of the sensor to impact is also compared to the response instatic, and the different factors affecting the sensor response in both conditions are described.Comparing and contrasting the sensor signal with that of an impact pendulum shows that the sensoris suitable for measuring impact in both flexible and rigid structures

Type of Medium: Electronic Resource

URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.56.122.pdf

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Microhardness-structure correlation of iPP/EPR blends: influence of molecular weight and EPR particle content (1998)

Flores, A. ; Aurrekoetxea, J. ; Gensler, R. ; [et al.]

Springer

Colloid & polymer science 276 (1998), S. 786-793

add to mindlist on the mindlist

Details

ISSN: 1435-1536

Keywords: Key words Microhardness ; poly(propylene) ; ethylene-co-propylene rubber ; blends ; surface free energy

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract The influence of molecular weight on the mechanical properties of isotactic poly(propylene) (iPP) and iPP blended with ethylene-propylene copolymers has been investigated by means of the microhardness technique. The hardness (H) of iPP is shown to slightly decrease with increasing molecular mass, within the range of molecular weights investigated. The H-decrease is correlated to a loss of crystallinity as the average molecular weight increases. On annealing, the mechanical properties are enhanced as a consequence of an increase in both, the degree of crystallinity and the crystalline lamellar thickness. A value of H ∞ c for iPP crystals of infinite thickness in the α-form is proposed for the first time. The inclusion of EPR particles in the iPP matrix softens the material. This result could be explained in terms of an increase in the basal surface free energy of the iPP crystals with increasing amount of rubber content.