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What is an anti-metal tag?

2023-10-12 View:

RFID (Radio-Frequency Identification) technology is a method of data transmission and read/write operations through radio signals. It finds extensive applications in areas such as logistics management, inventory control, vehicle management, and anti-counterfeiting traceability. However, the use of RFID technology in metallic environments poses challenges due to the interference and absorption characteristics of metal with radio signals. In response to this issue, OPP IOT has introduced anti-metal tags.

I. Principles of Anti-Metal Tags
RFID Technology Principle: RFID technology generates a high-frequency electric field through an antenna. When the signal sent by the reader encounters the antenna on the tag, it induces current. The frequency of the induced current matches the frequency of the received high-frequency signal. The chip inside the tag, upon receiving the induced current, activates the internal circuit, reads data from the storage area, and sends it back to the reader. However, when a tag is placed on a metal surface, interference between the reflected waves from the metal surface and the waves received by the tag can affect the reading distance, accuracy, and even lead to reading failures.

To address this issue, OPP IOT has introduced anti-metal tags. These tags optimize the antenna structure by reducing the size of the antenna and changing its shape, bringing the tag closer to the state of a half-wavelength antenna. This minimizes interference from reflected waves. Additionally, anti-metal tags can further reduce the impact of reflected waves on tag reading and writing by setting multiple antennas and adding buffers.

II. Functions of Anti-Metal Tags
1.Interference Resistance: Anti-metal tags eliminate interference from metal surfaces, improving tag recognition rates and reliability.
2.Long-Range Reading: Compared to regular tags, anti-metal tags maintain a longer recognition distance on metal surfaces.
3.Stability: Regular tags may exhibit inconsistent reading performance in different environments due to the impact of metal surfaces. In contrast, anti-metal tags demonstrate more stable and reliable reading and writing capabilities on metal surfaces.

III. Characteristics of Anti-Metal Tags:
1.Waterproof and Wear-Resistant: As anti-metal tags are primarily used in logistics and inventory management, where they often encounter scenarios involving water, collisions, and friction, these tags typically have excellent waterproof, collision-resistant, and durable properties.
2.Suitability for Metal Surfaces: Compared to regular tags, anti-metal tags adapt better to the usage environment of metal surfaces, enabling faster data reading on metal surfaces and proving beneficial for managing items like steel coils and machine parts.
3.Reusability: Anti-metal tags can usually be read and written multiple times, allowing for multiple uses throughout the lifecycle of an item, thereby improving efficiency and reducing costs.

IV. Application Scenarios of Anti-Metal Tags:
1.Logistics Management: In logistics processes, items often need to be loaded into metal boxes or onto metal shelves. Using anti-metal tags stabilizes the identification of item information, effectively improving logistics efficiency.
2.Vehicle Management: In the field of vehicle management, tags are typically installed on vehicles to track and manage vehicle information. However, vehicles usually have metal surfaces, and anti-metal tags adapt better to these surfaces, improving tag reading efficiency and accuracy.
3.Parts Management: In industries such as automotive, aviation, and power, anti-metal tags are commonly used to track and manage various parts, enhancing the efficiency of part tracking and inventory management.
4.Factory Production Equipment Management: In industrial settings, anti-metal tags can be used to manage equipment operating status, maintenance records, and other information, improving the accuracy and efficiency of equipment management.
5.Logistics Distribution: In the logistics field, anti-metal tags can track information about the location and transportation routes of goods, enhancing accuracy and efficiency in logistics distribution.
6.Identification Management in Hazardous Areas such as Oil and Water: Due to the waterproof, collision-resistant, and durable characteristics of anti-metal tags, they can be used for identification management in hazardous areas like oil and water, improving workplace safety and efficiency.

Anti-metal tags play a crucial role in RFID technology, offering features such as long reading distance and strong interference resistance. They have found widespread applications in logistics, vehicle management, dynamic leasing, and other fields. With the development of the Internet, the Internet of Things, and the increasing prevalence of smart technologies, anti-metal tags are expected to have even broader application scenarios and greater market demand in the future.

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                            OPPIOT Technologies Co., Ltd. is a leading trusted Industrial RFID tags manufacturer and supplier in China. Since our establishment in 2013, we have been endeavoring to provide best in class, cost effective and practical RFID solutions to a wide range of industries worldwide.
            We have our own production line for RFID tags with bringing in full set of advanced equipments for R&D...[more]