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Guide: how to choose handheld RFID readers?

Views: 0     Author: Site Editor     Publish Time: 27-06-2022      Origin: Site

What is the difference between handheld rfid computer technology and NFC technology?

Radio Frequency Identification (RFID, electronic tags), Near Field Communication (Near Field Communication, NFC) are two popular keywords, both of which belong to tagging technology (Tagging). NFC is developed on the basis of RFID. NFC is no different from RFID in essence. It is used for signal transmission between two objects that are geographically close.

RFID is a non-contact identification technology from a professional point of view, which is divided into two types: active and passive. Working principle: The RFID reader emits radio frequency, passes through the coil of the electronic tag, generates a signal, and the reader reads and decodes the information to complete the entire identification process. In general, active tags (active tags) can also actively send signals. The RFID system is mainly composed of two types: reader (Reader) and transponder (Transponder).

NFC is currently the most widely used technology in mobile phones. Working principle: When two NFC devices approach within a relatively close distance, they exchange information with each other and complete corresponding transactions and other functions. The biggest feature of NFC is that the reader and transponder are integrated into the same chip. The biggest highlight of NFC technology is the addition of point-to-point communication function, which can quickly establish P2P (point-to-point) wireless communication between Bluetooth devices, and NFC devices find each other and establish a communication connection. The two devices of P2P communication are in a peer-to-peer relationship, while the two devices of RFID communication are in a master-slave relationship.

The relationship between the two: From a mathematical point of view, it can be considered that NFC is a subset of RFID, that is, RFID with a communication distance of less than 10cm or 4inch is NFC. This difference is mainly due to the fact that in some applications specially designed for cash payment and credit card, other devices can also receive personal RFID information under the communication distance of RFID, so there are many unsafe factors; and it is effective for NFC work. The distance is about 10cm, so it has high safety in itself. If some special signal acquisition equipment is used, the RFID information can be read from a considerable distance.

rfid mobile computer company -Cilico


How to choose RFID mobile terminals?

RFID is a very important technology under the concept of Internet of Things. It has been successfully applied in the field of warehousing in recent years. Through the wireless identification function, RFID can quickly identify and record the quantity and location of items, making warehousing operations with many items complicated. For simplicity, double the efficiency. When an enterprise decides to introduce RFID for warehouse management, in addition to establishing a management mode, it is more important to choose hard equipment.

The main hardware devices of RFID are divided into two categories: handheld terminals and RFID labels. The forms of RFID labels are quite diverse, and usually change with the attached objects, such as card type, square type, round type, box type, stick If it is distinguished by function, it can be divided into three types: read-only type, write-once type, and repeatable read-write type. If it is distinguished by the internal design form of RFID tags, it can be divided into active and semi-active ( Also known as semi-passive) and passive three.

As for the form of RFID reader, it is much simpler. At present, there are three common types: hand-held, fixed, and door-opening. The number of antennas installed inside the reader usually ranges from one to four. If you want to expand the reading range , you can choose to install an antenna around the reader to enhance the transmission or reading power of RF signals, thereby extending the sensing distance between the tag and the reader.

Faced with numerous RFID devices, how should companies choose? The best way is to select devices based on the application model and in line with the on-site environment.

When evaluating the products of hardware manufacturers, companies are most likely to fall into the blind spot of price comparison, but when introducing RFID systems, they must not only look at price, they should give priority to quality, and do not care about price blindly, so as to make the best Your own choice.

However, the term quality is very abstract. It is difficult to know whether the device has stable quality based on appearance alone. The best way is to continuously test, especially in the case of fast reading and large data volume, the best way to see the reader's quality is Performance difference. For example, a reader with poor performance can only read data on the left and right sides of the pallet, but a device with good performance can read data in four directions at the same time.

The last issue is the choice of RFID tags. Since the unit price of RFID tags is still high, if companies want to reduce the cost of importing, it is best to choose tags that can be read and written repeatedly to make them a corporate asset, rather than a consumer product like a barcode. , in order to improve the import efficiency of RFID.