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Pacific Security Network News ]
This article Pacific Security Network Xiaobian for everyone to explain about the supermarket anti-theft two issues: The first is the commodity barcode is unique? The second is the principle of the supermarket electronic anti-theft system (door detection equipment).
First, regarding the bar code of the goods, first of all, the same kind of products, such as a brand and packaged cigarettes, chewing gum, are common, and the bar codes are all the same. . If you buy it from another store and bring it into the supermarket, you will definitely be suspected of stealing. . This is for sure. . Therefore, supermarkets are not allowed to bring such goods into the supermarket, they will remind you to save. . Regarding the bar code, it does not play an anti-theft role. It is developed to facilitate the management of goods in and out of the warehouse, the monitoring of the circulation field, and the process of financial inventory. It is to track a commodity from production to consumption (to be sold). All processes. Assigning a barcode to a product is also a function of this.
Second, regarding the electronic anti-theft system for supermarket products, there are only three systems in China that are currently used:
Classification and principle of electronic burglar alarm system for supermarket goods
Acoustic magnetic system
The tuning fork only causes resonance when the oscillation frequency is the same. Acoustic magnetic system (Acusto Magnetic) is the application of this physical principle to achieve almost zero false positive operation. When the acoustic magnetic system tag fixed on the commodity enters the detection area of ​​the system, resonance will occur, but only at the receiver. The alarm is issued after four consecutive resonance signals (every 1/50th of a second).
The characteristics of the acoustic magnetic system are high anti-theft detection rate, almost zero false alarm, good anti-interference, and the protection export width can reach 3.5 m. There are two kinds of anti-theft tags, which can protect most types of goods in the mall. And can degaussing repeatedly, even if the system is still working properly next to the POS cash register.
Acoustic magnetic systems include vertical systems, channel systems and concealed systems. There are more than 10 models to choose from. They can be widely used in department stores, supermarkets, specialty stores, audio-visual stores, grocery stores, pharmacies, and also in Office building and other environments.
Radio system
The radio system (Radio Frequency, RF) uses radio waves as the signal for transmitting and receiving, and the detection frequency range is 7. x~8. x megahertz. The biggest advantage of the radio system is that the system cost is very low and the installation is convenient. However, because the anti-theft tag is a toroidal coil type, the system is susceptible to interference from some items, such as electronic products such as cash registers, metal objects, etc., causing false positives or failures of the system.
The radio system has both soft and hard labels that protect most of the items in the mall. The distance between the two supports is generally not more than 0 9 meters, and is usually used in shopping malls with only one entrance and exit. The radio system has two types, vertical and channel, for protecting department stores, clothing stores, supermarkets, etc.
Electromagnetic wave system
The Electromagnetic System uses electromagnetic waves as detection signals.
The electromagnetic wave system has the smallest label, the label price is also cheap, and the degaussing can be repeated, but it is susceptible to false alarms due to the influence of magnetic or metallic substances. The width of the protected exit is generally around 0.9 meters. The system does not affect magnetic items such as audio tapes, video tapes, and magnetic cards.
The new generation of channel-type electromagnetic wave system is a software-controlled electronic anti-theft system that uses digital processing technology and degaussing system, cashier monitoring and closed-circuit television monitoring system. The use of a fast degaussing plate allows for repeated degaussing and high system cost. Electromagnetic wave systems are available in both vertical and channel types. The application environment is mostly in libraries, bookstores, sound stores, hotels, supermarkets, etc.
Iron Fence
1. Iron Fence: This type of fence is made from iron, which is a strong and durable material. It is often used for security purposes due to its robustness. Iron fences are also aesthetically pleasing and can add a touch of elegance to any property.
2. Metal Spear Fence: This type of fence is characterized by its spear-like tops, which can deter potential intruders. It is usually made from metal, making it sturdy and long-lasting. Metal spear fences are often used for commercial properties or large estates.
3. Zinc Steel Fence: This type of fence is made from steel that has been galvanized with a layer of zinc. The zinc coating helps to prevent rust and corrosion, making the fence more durable. Zinc steel fences are often used for industrial or agricultural purposes.
4. Decorative Fence for Garden: This type of fence is designed to enhance the beauty of a garden rather than for security purposes. It is often made from a variety of materials, including wood, metal, and vinyl. Decorative fences can come in a range of styles, from traditional picket fences to more modern designs.
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