The application of RFID electronic tags mainly meets one or several of the following requirements:
(1) requirements for traceability and traceability of item information;
(2) Requirements for high accuracy and high security;
(3) Requirements for unique identification and unforgeability;
(4) the need for handling the speed of a large number of items;
(5) The need for real-time monitoring of items.
It can be seen that the application market is not limited to the above, as long as the system has the above requirements, the electronic tag can be applied.
So how do you choose a suitable RFID tag? Let's talk about it.
Why do you need customization?
RFID radio frequency identification technology is one of the main means of automatic data acquisition. Electronic tags are an integral part of RFID systems. However, in most cases, the versatility of electronic tags is not strong, but can be selected according to the needs of the scene. Different RFID electronic tags. For example, in terms of frequency bands, it can be divided into LF, HF, UHF, 2.4G and 5.8G. Different frequency bands have their own advantages and disadvantages - low-frequency products have good penetration, but data transmission rate is limited. It can be applied to animal management; high frequency (HF) is often applied to payment and various identifications due to its read distance and protocol limitations; passive ultra high frequency (UHF) can be read from a distance, the most important feature is once Sexual batch reading, but subject to environmental interference, especially metal and liquid, mainly used in clothing retail and logistics warehousing; 2.4G and 5.8G active products signal stability, large data transmission, reading distance is very far, but the battery Poor durability and high price are the shortcomings of the application.
Products in the same frequency band have different packaging styles and installation methods because of different environments. For example, HF is used for payment and identity management, and is often in the form of PVC card. For anti-counterfeiting source, you can use The way of shredded paper or coated paper. The same application of the same frequency band product, because of the particularity of the problem encountered by the customer, also shows a certain difference. For example, when the HF fragile label is used for the traceability of milk powder, if the surface of the milk powder can is made of plastic material, it can be directly pasted. If it is a metal material, it is also considered to add a layer of absorbing material.
In general, the RFID band's frequency characteristics, application scenarios, performance indicators and installation requirements have affected the standardization of RFID. Therefore, the customized development of RFID tags is a key factor in determining the success of RFID system applications.
RFID UHF working principle 1.jpg
How RFID works
How to customize RFID tags
RFID electronic label customization development is a systematic project. The author's experience generally needs to go through six stages: needs assessment, preliminary selection, cost assessment, sample development, scene measurement, selection optimization, and time spent according to project requirements. The complexity is not the same, short may be as long as half a month, long or more than three months.
1 needs assessment
Demand assessment is the most critical step, and we need to evaluate whether RFID RFID technology is needed based on the user's application scenario. Not all applications are suitable for RFID radio frequency identification technology, such as the traceability of many primary agricultural and industrial products - cabbage, grapefruit, steel, pipe fittings, etc. These products are not affordable due to their own value, in application In the process, the application effect will also be affected by the interference of the items. Therefore, the bar code technology with lower cost is often used to solve the problem.
So when do you choose RFID radio frequency identification technology? Take airport baggage sorting as an example. First, the cost is high. The aviation industry has a large volume and high service value. The efficiency requirements are very high, and the efficiency cost is also high. Secondly, the cost is high. Technically, baggage bar code identification cannot be fixed in position. If bar code technology is used, it is difficult to read and process in batches. One-to-one reading often requires manual assistance, which is low in efficiency and high in cost. This creates a strong demand for RFID radio frequency identification technology - UHF technology can greatly improve baggage sorting speed with relatively low cost while ensuring accuracy. That is, the demand assessment is based on the application scenario of the user to confirm whether the RFID can meet the requirements of the two major indicators of technology and cost, and if it can be satisfied, the technology is adopted.
RFID applied to airport baggage sorting 1.jpg
RFID electronic tag for bag sorting
2 preliminary selection
After the explicit use of RFID radio frequency identification technology can solve the "pain point" of demand, then the key to the next step is the selection of RFID electronic tags. According to the results of the needs assessment, the electronic tag frequency band, product size, chip type, package form and installation method are selected.
We take the selection of a fragile label as an example to introduce the process: A customer needs a label for the outer packaging of high-end consumer products, the purpose is anti-counterfeiting and traceability. In order to facilitate consumer verification, we recommend the high-frequency 14443A protocol; the carton is square and has a certain elastic force at the fold position. We recommend using a coated paper material that has both anti-tear and flexibility. For ease of installation, we use adhesive bonding.
At the time of chip selection, the customer proposed to use a chip they provided. For this reason, we have re-developed a line type based on the chip data; considering the need for a slightly longer label at the location of the fold, the size is too large to increase the cost, we recommend The customer has a rectangular label of appropriate size.
3 cost assessment
After the preliminary selection meets the customer's requirements, the cost is evaluated based on the results. The factors affecting cost are mainly chip type, package form, product size and data requirements. The first is the chip. According to the different requirements, imported or domestic chips can be used. Generally speaking, the price of imported chips will be higher, and the storage capacity will be larger. The higher the price of the chip, the higher the price of the chip, such as encryption, TD, dual-band, etc. The second is the package. The more complicated the structure of the package, the more difficult the package and the higher the cost. Size is also a factor, generally the larger the size, the higher the price, but in the field of micro-labels, the difficulty of processing becomes larger, but the smaller the size, the higher the price. Data requirements mainly involve surface coding, writing data, extracting data and data associations, etc., each of which adds cost. Because of these factors, we generally provide 3 to 4 sets of solutions for customer reference, and choose the best solution for sample development.
4 sample development
The most important thing in the process of sample development is not the cost of research and development, but the length of the development cycle. The shorter the time spent on this part of the work, the greater the strain space at the end of the project and the higher the success rate of the project. Sample development requires several necessary steps, including antenna design, material fabrication, antenna etching, hand-made, and verification.
We still use A customer as an example. The antenna design is 5-10 working days, and 10 working days are produced and verified. It should be emphasized here that if the conventional package form and process technology have been confirmed, the main development time is in the design of the antenna; if a new package form is encountered, different process technologies need to be tried, during the development process. There are many uncertainties, and there is no guarantee that one-time success will take longer. The speed of sample development is a key indicator for testing the customization capabilities of an RFID electronic label company.
5 scene measurement
After the sample is developed, if there are conditions, you need to simulate the application scenario to test and test the reliability. After the customer receives the sample, it will perform the actual measurement of the scene, evaluate the effect, and propose optimization suggestions, including whether the performance is up to standard, whether the size is adjusted, whether the printing and data are changed.
6 selection optimization
If the initial sample fails to meet the project requirements, it is necessary to analyze the customer test feedback data, and even it is necessary to go to the site for field research, summarize various information, confirm the optimization plan, and carry out the second proofing and actual measurement. Therefore, a complete sample development cycle takes approximately one month at the earliest.