What is a non-contact IC card reader? What are the advantages?

- Nov 18, 2020-

What is a non-contact IC card reader? What are the advantages?

The non-contact IC card, also known as the radio frequency card, is composed of an IC chip and an inductive antenna, and is packaged in a standard PVC card. The chip and antenna have no exposed parts. It is a new technology developed in the world in recent years. It successfully combines radio frequency identification technology and IC card reader technology, ending the problem of passive (no power in the card) and contact-free. A major breakthrough in the device field. The card is close to the surface of the reader at a certain distance (usually 5-10mm), and the data is read and written through the transmission of radio waves.


    1. The read and write operations are done through radio waves between the non-contact and the card reader. The communication frequency between the two is 13.56MHZ. The contactlessness itself is a passive card. When the reader reads and writes to the card, the signal sent by the reader is composed of two parts: one is the power signal, which is received by the card, and its L/ C generates an instantaneous energy to supply the chip to work. The other part is the instruction and data signal, which instructs the chip to complete data reading, modification, storage, etc., and returns the signal to the reader to complete a read and write operation. The reader is generally composed of a single-chip microcomputer, a dedicated intelligent module and an antenna, and is equipped with a communication interface with a PC, a printer port, an I/O port, etc., so that it can be used in different fields.


   2. Non-contact smart card internal partition   The non-contact smart card is divided into two parts: system area (CDF) user area (ADF)    system area: used by card manufacturers, system developers and card issuers.  User area: used to store relevant data information of the cardholder.


   3. Compared with the contact type, the contactless card has the following advantages:

 ⑴High reliability, no mechanical contact between the non-contact type and the reader, avoiding various failures due to contact reading and writing. For example:    due to rough card insertion, non-card foreign object insertion, dust or oil pollution caused by poor contact failure. In addition, there is no exposed chip on the surface of the non-contact card, and there is no need to worry about the chip falling off, electrostatic breakdown, bending damage, etc., which is convenient for card printing and improves the reliability of the card.

 ⑵Easy to operate. Due to the non-contact communication, the reader can operate the card within the range of 10CM, so there is no need to insert the card, which is very convenient for users to use. When the non-contact card is used, there is no directionality, and the card can be read in any direction. The surface of the writer can complete the operation, which greatly improves the speed of each use.

 ⑶The anti-collision non-contact card has a fast anti-collision mechanism, which can prevent data interference between the cards. Therefore, the reader can "simultaneously" process multiple non-contact cards. This improves the parallelism of the application and improves the invisibly System working speed.

 ⑷The serial number of a contactless card that can be suitable for a variety of applications is unique. The manufacturer has solidified this serial number before the product leaves the factory and cannot be changed. A two-way verification mechanism is used between the contactless card and the reader. That is, the legitimacy of the reader is verified, and the legitimacy of the reader is also verified.    The contactless card must be mutually authenticated with the reader three times before processing, and all data is encrypted during the communication process. In addition, each sector in the card has its own operating password and access conditions.  The memory structure characteristic of the contact card makes it multi-purpose with one card and can be used in different systems. Users can set different passwords and access conditions according to different applications.

   ⑸Good encryption performance   The non-contact type is composed of IC chip and induction antenna, and is completely sealed in a standard PVC card without exposed parts. The non-contact reading and writing process usually completes the reading and writing operations by radio waves between the non-contact type and the reader. The non-contact type itself is a passive body. When the reader reads and writes the card, the signal sent by the reader is composed of two superimposed parts: one is the power signal, which is received by the card, and its own L/ C generates resonance and generates an instantaneous energy to supply the chip to work. The other part is to combine data signals to instruct the chip to complete data, modification, storage, etc., and return it to the reader. The read-write system formed by the non-contact type has greatly simplified both the hardware structure and the operation process. At the same time, with the help of advanced management software, the offline operation mode makes the data reading and writing process more convenient. simple.

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