En el presente trabajo se desarrolla, a partir del efecto Barkhausen, voltaje inducido en la bobina, conocido como ruido magnético Barkhausen (RMB), con el. Keywords: Magnetic Barkhausen noise, carbon steel welding, non-destructive magnetic testing, signal .. “Utilización del efecto Barkhausen. Mathematical model to characterize the ageing on over aged 12Cr1MoV steel starting from Barkhausen effect. Ingeniería Mecánica [online]. , vol, n.1, pp.

Author: Dasida Mezile
Country: Comoros
Language: English (Spanish)
Genre: Relationship
Published (Last): 14 April 2012
Pages: 119
PDF File Size: 13.80 Mb
ePub File Size: 2.46 Mb
ISBN: 814-9-99438-836-9
Downloads: 8015
Price: Free* [*Free Regsitration Required]
Uploader: Nile

East Dane Designer Men’s Fashion. The invention relates to a security element for electronic article.

As already explained above, the orientation of the fibers may take place again by barrkhausen magnetic field, which is subjected mass still wet pulp during the manufacturing process.

By clicking accept or continuing to use the site, you agree to the terms outlined in our Privacy PolicyTerms of Serviceand Dataset License. Method and apparatus for producing uniform electromagnetic fields in an article detection system.


Multi-directionally responsive, dual-status, magnetic article surveillance marker having continuous keeper. Publications cited in the prior art referred to in particular by special physical treatment of magnetically soft material, it can be converted into a material with a high Barkhausen effect. The security elements in the form of soft magnetic material strips are widely used in department stores for the protection of goods against theft.

En los dibujos, las figuras efecro Read more Read less. This can minimize coupling of both materials through their magnetic fields. According to an advantageous embodiment of the security element according to the invention, it is proposed that the material with Barkhausen effect, as strips or wires, is oriented parallel to the fibers of the soft magnetic material.


Security element for electronic article surveillance.

Alexa Actionable Analytics for the Web. While the interrogation frequency Barkhausen surveillance system S1 is in the band of low frequencies eg.

Material 1 in strip form or wire with Barkhausen effect or fibers 2 is magnetically soft or are excited s by the interrogation field H for emitting a characteristic signal signal 1, signal 2. The invention is explained on the basis of the figures that follow.

Padovese Published When a barkahusen magnetic field is applied to a ferromagnetic material, it has been observed that, next to the coercive field Hcrise in induction B takes place through abrupt jumps known as Barkhausen jumps. It is optimal when both materials are arranged perpendicular to each other since then the mutual influence is zero. barkhhausen

Share your thoughts with other customers. This has been disclosed, in EP B broadcast the interrogation zone, in addition to two interrogation fields with the frequencies f1 and f2 in the band harkhausen kHz, a field with a frequency so located in the band of Hz. AmazonGlobal Ship Orders Internationally. Una capa portadora 8 hecha de masa de celulosa es fabricada, de manera conocida, en forma de una pista sin fin.

The differences are only in the detail. While the hysteresis curve in the case of material 2 magnetically soft presents, between the two states of opposite magnetization, a constant linear transition, in the case of material 1 with Efecho effect high transition occurs discontinuously for intensity H field relatively small.

Barkhausen Effect, , ,

Amazon Music Stream millions of songs. Set up a giveaway. Optimization in the sense of the invention means rather find a compromise between minimal interaction of materials and detection rate as high as possible in systems which are structured to signal detection characteristics in different frequency bands. In case of an arrangement the magnetic fields of barkhauwen security elements 1, 2 influence at all.


Security element for electronic article formed of a material 1 with Barkhausen effect which is excited by an external magnetic field H1to issue a first signal signal 1 feature, which is recognizable in a surveillance system S1 a soft magnetic material, which is excited by applying an alternating magnetic field H2 to issue a barkhaisen signal signal 2 feature which is recognizable in a surveillance system S2wherein the components of maximum signal of both materials 1; 2 are in frequency bands F1, F2 different and wherein the signal components of a material 1; 2 are in each case negligibly small in the frequency band F2; F1 in which the signal component of the other material 2; 1 is at a maximum level.

wfecto In US-PS 4,, or also in EP A1are explained in detail the properties of these materials as well as the physical basis of Barkhausen effect. ComiXology Thousands of Digital Comics. Microhardness and microstructure were also characterized. To reduce the demagnetizing factor of the security element 3, which facilitates magnetisability the security element 3 in the barmhausen field of monitoring devices S1, S2, are provided in the two lateral areas of the strip or wire made of material with Barkhausen effect 1, 11 side sections.

Preferably deactivator materials for soft magnetic material and the Barkhausen material with high defect are different in nature. English Choose a language for shopping. I’d like to read this book on Kindle Don’t have a Kindle?