Wednesday, 18 September 2013

What is the EAS Systems.....

A lack of understanding about how Electronic Article Surveillance or EAS works is most often the downfall in achieving the best results. The information below will help you understand how it all works together for optimum results.


What is an EAS System?
Electronic Article Surveillance (EAS) is a technological method for preventing shoplifting.
It usually involves three components:
Electronic Antenna
Deactivator or Detacher
Electronic Tag

Special tags and labels are fixed to merchandise or books. These tags or labels are removed or "deactivated" by the clerks when the item is properly bought or checked out.
Labels are deactived using a "Label Deactivator".
While ringing up purchases a cashier should pass each product label across the "Deactivation Pad".
To remove a Hard Tag a cashier uses a "Detacher" which releases the pin.
After a label is deactivated or a tag is removed the customer can then pass by the antenna without any alarm.
At the exits of the store, a detection system sounds an alarm or otherwise alerts the staff when it senses active tags are passing by.

Types of EAS systems and how they work.
There are several major types of electronic article surveillance systems :
Magnetic or magneto-harmonic
Acousto-magnetic or magnetostrictive
Radio Frequency
Microwave



Magnetic systems or 'Electromagnetic' (or EM) systems


The tags for these systems are made of a strip of amorphous metal.
An amorphous metal is a metallic material with a disordered atomic-scale structure. In contrast to most metals, which are crystalline and therefore have a highly ordered arrangement of atoms, amorphous alloys are non-crystalline (metglas) which has a very low magnetic saturation value. Except for permanent tags, this strip is also lined with a strip of ferromagnetic.
Ferromagnetism is the basic mechanism by which certain materials form permanent magnets and/or exhibit strong interactions with magnets; it is responsible for most phenomena of magnetism encountered in everyday life.
Detection of the tag is achieved with a transmitter and receiver.
The transmitter and receiver work together to sense harmonics and sum or difference signals generated by the non-linear magnetic response of the material under a mixture of low-frequency (in the 10 Hz to 1000 Hz range) magnetic fields.
When the ferromagnetic material is magnetized, it biases the amorphous metal strip into saturation, where it no longer produces harmonics. Deactivation of these tags is therefore done with magnetization. Activation requires demagnetization. Due to the system being able to deactivate and re-activate this type of system is extremely suitable for libraries.
Due to the convenient dimensions of the tags, and their very low cost, this system is popular in libraries.




Acousto-magnetic systems
These tags are similar to magnetic tags in that they are made of two strips, a strip of magnetostrictive.
Magnetostriction is a property of ferromagnetic materials that causes them to change their shape when subjected to a magnetic field. The effect was first identified in 1842 by James Joule when observing a sample of nickel called ferromagnetic.
Ferromagnetism is the basic mechanism by which certain materials form permanent magnets and/or exhibit strong interactions with magnets; it is responsible for most phenomena of magnetism encountered in everyday life called amorphous metal.
An amorphous metal is a metallic material with a disordered atomic-scale structure. In contrast to most metals, which are crystalline and therefore have a highly ordered arrangement of atoms, amorphous alloys are non-crystalline and a strip of a magnetically semi-hard metallic strip, which is used as a biasing magnet (to increase signal strength) and to allow deactivation. These strips are not bound together but free to oscillate mechanically .
Amorphous metals are used in such systems due to their good magnetoelastic coupling, which implies that they can efficiently convert magnetic energy to mechanical vibrations.
The detectors for such tags emit periodic tonal bursts at about 58 kHz, the same as the resonance.
In physics, resonance is the tendency of a system to oscillate at larger amplitude at some frequencies than at others. These are known as the system's resonant frequencies . At these frequencies, even small periodic driving forces can produce large amplitude vibrations, because the system frequency of the amorphous strips. This causes the strip to vibrate longitudinally by magnetostriction, and will continue to oscillate after the burst is over. The vibration causes a change in magnetization in the amorphous strip, which induces an AC voltage in the receiver antenna. If this signal meets the required parameters (correct frequency, repetition etc.) the alarm is activated.
When the semi-hard magnet is magnetized, the tag is activated. The magnetized strip makes the amorphous strip respond much more strongly to the detectors, because the DC magnetic field given off by the strip offsets the magnetic anisotropy.
Magnetic anisotropy is the direction dependence of a material's magnetic properties. A magnetically isotropic material has no preferential direction for its magnetic moment in zero field, while a magnetically anisotropic material will align its moment to an easy axis.-Sources of magnetic within the amorphous metal. The tag can also be deactivated by demagnetizing the strip, making the response small enough to that it will not be detected by the detectors.
These tags are thicker than magnetic tags and are thus seldom used for books. However they are relatively inexpensive and have better detection rates (fewer false positives and false negatives) than magnetic tags.




Radio-frequency systems
These tags are essentially an LC tank circuit.
An LC circuit is a resonant circuit or tuned circuit that consists of an inductor, represented by the letter L, and a capacitor, represented by the letter C that has a resonance
In physics, resonance is the tendency of a system to oscillate at larger amplitude at some frequencies than at others. These are known as the system's resonant frequencies . At these frequencies, even small periodic driving forces can produce large amplitude vibrations, because the system peak anywhere from 1.75 MHz to 9.5 MHz. The most popular frequency is 8.2 MHz. Sensing is achieved by sweeping around the resonant frequency and detecting the dip. Deactivation for 8.2 MHz label tags is achieved by detuning the circuit by partially destroying the capacitor.
A capacitor or condenser is a passive electronic component consisting of a pair of conductors separated by a dielectric. When a voltage potential difference exists between the conductors, an electric field is present in the dielectric. This field stores energy and produces a mechanical force. This is done by submitting the tag to a strong electromagnetic.
Electromagnetism is the physics of the electromagnetic field, a field that exerts a force on particles with the property of electric charge and is reciprocally affected by the presence and motion of such particles field at the resonant frequency which will induce voltages exceeding the capacitor's breakdown voltage.
The breakdown voltage of an Insulator is the minimum voltage that causes a portion of an insulator to become electrically conductive.The breakdown voltage of a diode is the minimum reverse voltage to make the diode conduct in reverse which is artificially reduced by puncturing the tags.



Microwave systems
These permanent tags are made of a non-linear element called a Diode.
In electronics a diode is a two-terminal electronic component which conducts electric current asymmetrically or unidirectional; that is, it conducts current more easily in one direction than in the opposite direction. The term usually refers to a semiconductor diode, the most common type today, coupled to one microwave and one electrostatic antenna.
At the exit, one antenna emits a low-frequency (about 100 kHz) field, and another one emits a microwave field.
The tag acts as a mixer reemitting a combination of signals from both fields. This modulated signal triggers the alarm. These tags are permanent and somewhat costly. They are mostly used in clothing stores.



Thursday, 5 September 2013

RISING STAR IN THE FIELS OF BARCODING......



Perfect Barcode Systems is a complete and reliable leading manufacturer and supplier of all types of Barcode Printers , Barcode Scanner , Barcode Labels and Ribbons , Receipt Printer , Thermal Paper Rolls, POS  systems, Pole display ,Cash Drawer, EAS Systems ,Blank and Pre-Printed Cards ,YMCKO Ribbons, Our products are appreciated for their durability and reliability. Our organization makes sure that any information regarding the clients that comes to us, is kept confidential. Confidentiality agreement is also available with us on demand. The quality of our products is unmatched and this is the reason these are demanded across the globe. Some of the industries we cater to are Clubs, Hotels, Automobiles, Pharmaceuticals, Cosmetics, Garments, Restaurants, Jewellers , Dry cleaners  Security and Insurance. For the convenience of our clients we offer customized solutions at economical prices.

OUR PRODUCT RANGE :

1. BARCODE PRINTERS : A barcode label printer prints high quality labels with speed and shelf-life which can improve work flow in any business: retail, warehouses, offices, inventory, and so much more. Our printers are direct thermal or thermal transfer. To view which of these printers are direct thermal or thermal transfer, please view the product detail at www.indiamart.com/perfect-barcode-systems or contact us directly.

2. BARCODE SCANNER : A barcode scanner can go a long way in improving efficiently and work flow in any business: retail, warehouses, offices, inventory, and so much more. Our scanners are split into two main categories: wired scanners, wireless scanners.

3.RECEIPT PRINTER :Avail from us an array of Receipt Printers, which is widely demanded in national and international market due to its advanced technology and easy functioning. We are one of the prominent Receipt Printer Exporters, and Suppliers from India. The Receipt Printer, we offer is manufactured using the superb quality printer mechanism.

4.BARCODE LABELS AND STICKERS :Highly renowned company engaged in manufacturing and supplying an extensive range of barcode Labels, We provides Blank or pre-printed labels which are applied in various industries  like.Garments,Jewellery,Pharmaceuticals,Automobiles,Chemicals,Dry cleaners Etc... These Labels are processed using a mixture of quality raw materials, the most advanced machines and under the supervision of well-qualified and experienced professionals. Our reliable and durable Fabric Labels are successfully catering customers’ needs and meeting international quality norms.

5 .BARCODE RIBBONS
Quality conscious company engaged in manufacturing and supplying unbeatable  Thermal Transfer Ribbon. These Thermal Transfer Ribbons are available in various Sizes, colors. Our Ribbons are highly compatible for all kinds of Barcode Printers. A Thermal Transfer Ribbon will be required to print the labels. These Ribbons are available at very economical prices to offer maximum satisfaction to customers. Following are the kinds of ribbons we are making:

Wax
: Wax is the most popular with some smudge resistance, and is suitable for matte and semi-gloss paper labels.
Wax-Resin
: Wax / Resin is smudge resistant, suitable for semi-gloss paper and some synthetic labels.
Resin
: Resin is scratch and chemical resistant, suitable for coated synthetic labels.
Wash Care :Wash care Resin ribbon is capable of handling extreme environmental labeling. Highly chemical resistant including alcohol and petro chemicals. 


6.POS SOLUTION : Perfect Barcode Systems, offers a truly unique, complete POS computerized retail sales and inventory control system for retail stores, salons and hospitality businesses. Plus we offer a variety of associated products and services which will work together to make managing your business easier!