Friday, December 31, 2021 • Güncelleme Tarihi :
What is RFID ?
Such as computer networking technology, which was invented in the decade of 60's or 70's but their widespread adoption happened only with the advent of Internet. Similarly, the use of RFID technology became more popular with the advent of IOT (Internet of Things). After this, we know that how people have started using RFID in every part of our life in the present time.
Seeing the popularity of RFID so much, today I thought why not provide complete information to our readers in topics like what is RFID, what is the technology used in it and how does this RFID work, so that they too can access any RFID devices. Before using it, know about the way it works.
If you really want to understand this technology, then you must read the whole article because maybe many of you will get to learn something new. Then without delay let's start and know what is Radio-frequency identification
What is RFID ?
The full form of RFID is Radio-Frequency Identification . This acronym refers to small electronic devices that are made up of a small chip and an antenna. This chip is typically capable of carrying 2,000 bytes of data.These RFID devices also work in the same way as a barcode or a magnetic strip on the back of a credit card or ATM card ; It provides a unique identifier for that object.
Just as a barcode or magnetic strip is scanned to retrieve information, an RFID device is also scanned to retrieve identifying information.
When and who was the first to introduce RFID technology?
RFID technology was first used on January 23, 1973 by Mario W. Cardullo . Who also holds the first US patent in his name in which he invented rewritable memory in an active RFID tag. In the same year, Charles Walton , an entrepreneur from California, received a patent in which he used a passive transponder to unlock the door without a key.What are the types of RFID systems?
By the way, there are many types of RFID Systems. But there are three main types of them1. Low frequency (LF)
2. High frequency (HF)
3. Ultra-high frequency (UHF)
4. Microwave RFID
Frequencies vary according to different country and region.
Low-frequency RFID systems range from 30 KHz to 500 KHz, while its typical frequency is 125 KHz. LF RFIDs have short transmission ranges, which can generally range from a few inches to six feet.
High-frequency RFID systems range from 3 MHz to 30 MHz, while its typical HF frequency is 13.56 MHz. And it has a standard range of a few inches to several feet.
UHF RFID systems range from 300 MHz to 960 MHz, while its typical frequency is 433 MHz and its standard range is 10 feet to 25-plus feet.
Microwave RFID systems run in a frequency of 2.45 GHz and can be read from a distance of 30+ feet.
How does RFID work
Before understanding the technology of RFID, we have to understand what are its different parts and what are their functions.There are mainly three parts to a Radio-Frequency Identification (RFID) system:
scanning antenna
A transceiver, while it also comes with a decoder. by which the data is interpreted
A transponder – RFID tag – which is programmed with some information.
In this, the scanning antenna spreads radio-frequency signals in relatively short range. This RF radiation does two types of work:
It provides a medium to communicate with the transponder (RFID Tag).
It provides energy to the RFID tag to communicate. (especially in passive RFID tags).
This is the key part of this technology, RFID tags do not require any batteries, and hence can be used for many years.
In this the scanning antennas are permanently attached to a surface; There are also handheld antennas available for use. They can take any shape or size that suits your needs; For example, you can also make them inside a door frame so that they can accept data from all persons who pass through that door.
When an RFID tag passes through the field of the scanning antenna, it detects the activation signal from that antenna. Which wakes up the RFID chip, and they start transmitting information from their microchip and which is picked up from the scanning antenna.
How many types of RFID tags are there?
If there are different types of RFID tags, but two types are most important among them.1. Active RFID Tags
2. Passive RFID Tags
Active RFID tags
These tags have their own power sources; The big advantage of this is that even if the reader is far away in these tags, he can still receive the signal. The life of these devices is up to 10 years , which shows that they have limited life spans.
Passive RFID tags
However, no batteries are required in these tags, and they are also very small in size. If we talk about their age, then they are of virtually unlimited life span. RFID tags can be read in a variety of circumstances, where barcodes and other optically read technologies are useless.
- In this, there is no compulsory for the tag to be in the surface of an object, so that it does not deteriorate very quickly.
- Its read time is typically less than 100 milliseconds .
- In this, a large number of tags can be read simultaneously, not item by item.
- This is how RFID technology works.
Where can RFID technology be used?
RFID technology is used only in their RFID tags. These tags come in many varieties, whose shapes and sizes are very different, together they are encashed in many different types of materials:- Animal tracking tags , which are inserted under their foreskin, to track their movements. Their size is the size of a rice grain.
- Some of the tags are also of screw-shape which is used to track trees and other wooden objects.
- RFID tags of credit-card shape are used in access applications.
- These tags are kept in many merchandise stores in the shape of anti-theft hard plastic tags.
- Heavy-duty 120 by 100 by 50 millimeter rectangular transponders are used to track shipping containers, heavy machinery, trucks, and railroad cars.
- RFID devices are used in dogs to identify them.
- Also, to prevent theft of many costly musical instruments, RFID tags are cleverly installed in them, so that the thief does not even realize that the item stolen by him can also be tracked.
Where are the RFID tags placed on vehicles?
RFID tags can be installed in many places in vehicles. Also, they have many uses too, if to be honest. So let's know about it.1. In Automated Tolling : In recent times, if we talk about tranportation inductry, then the introduction of FASTag has brought a big change in automated tolling, it is an RFID tag which is used for the application of automated tolling.
In this, the driver of any vehicle can easily pay the toll fee, only by passing through that RFID enables toll gate. In this, they do not need to stop anywhere and do not have to do any physical transaction. Now imagine how much utility they would have in busy traffic lanes.
2. In AVI (Automatic Vehicle Identification): RFID AVI Tags are used to fetch all the information about a vechile. For this it is not necessary to have physical papers of any vehicle. You just have to scan that tag and all the information of all the vehicles reaches you.
3. To Check Genuine : Some companies release such vehicles which already fit RFID tags, so that their genuineness can be verified. The same thing is applicable on their spare parts as well. Tamper-proof and tamper evident tags both are available to do the same job.
4. On the basis of RFID tire tags : It is not limited to reading information of tire assets only, but many things can also be tracked from it.
5. For Automated Parking and Access System : Using RFID technology, parking places can be easily automated. For this, you only have to scan the RFID windshield tags and after that the work will start happening automatically.
6. In Logistics : With its use, Transporting vehicles and their identification can be easily automated.
What is the difference between RFID and Barcodes ?
Although RFID tags and barcodes , both of them carry information about the products. But there is a huge difference in the use of both these technologies. So let's know more about the differences between RFID and Barodes:Barcode readers need a direct line of sight for those printed barcodes ; Whereas RFID readers do not need a direct line of sight. Be it active RFID tags or passive RFID tags.
RFID tags can be easily read from long distances by an RFID reader , which is up to 300 feet. At the same time, the range to read a barcode is very short, which is typically less than 15 feet.
RFID readers can quickly interrogate and read RFID tags; Which are in 40 or more tags per second. Whereas barcodes are more time-consuming to read, as it requires a direct line of sight. On the other hand, if the items are not oriented properly, then it also takes more time (few seconds) to read a barcode.
Because Line of Sight is needed to read Barcodes properly. Having these requirements limits the ruggedness of the barcode and with it the reusability of the barcodes (in simple language, line of sight is required for barcodes, so the printed barcode has to stay on top of the product so that it is more exposed Yes to the barcode reader.
At the same time, there is a possibility of more cuts and spoilage in that barcode). In contrast, RFID tags are more rugged, as the electronic components are protected by a plastic cover in it. RFID tags are often implanted in the product itself, which guarantees it to be more rugged and reusable.
Barcodes have no read/write capability; This means that you cannot add any additional information to it in a printed barcode. Whereas RFID tags, but can be easily read/written by devices, an RFID reader can easily communicate with the tag, and the information in it can also be altered according to the tag design.
Whereas RFID tags are more expensive than barcodes.
what did you learn today
I hope you must have liked my article What is RFID . It has always been my endeavor to provide complete information about Radio-frequency identification to the readers so that they do not have to search any other sites or internet in the context of that article.This will also save their time and they will also get all the information in one place. If you have any doubts about this article or you want that there should be some improvement in it, then you can write low comments for this.
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