What exactly is RFID? Let me explain to you about RFID technology
Edit： Click： Times Date：2026-7-30
What exactly is RFID? Let me explain to you about RFID technology
Why does Uniqlo only need a few minutes to inventory tens of thousands of clothes?
Why does ETC on highways deduct fees without stopping?
Why do SF packages automatically know where they are going through the sorting line?
Behind it all is the same technology - RFID radio frequency identification
Today's science popularization article will explain what it really is 👇
🔍 What is RFID?
RFID = Radio Frequency Identification， Radio Frequency Identification
Commonly known as: electronic tags
The core competency is in one sentence:
Read item information remotely through radio waves
No alignment, no contact, no light
Once within the recognition range, the data will be automatically uploaded
⚙️ Working principle disassembly
The RFID system consists of three parts:
one ️⃣ Electronic Label
Attach to the item and store a unique ID or data
Composed of chip and antenna
No battery required, powered by electromagnetic waves emitted by the reader/writer
two ️⃣ reader
Transmitting RF signals to activate tags
Receive data returned by tags
Can be fixedly installed (channel door, production line), or handheld (PDA)
three ️⃣ backend system
Process the read data
Connect ERP, WMS, MES and other management systems
Workflow*
Reader sends signal → tag induction takes power → tag returns data → reader receives and decodes → system processes response
The whole process takes less than 100 milliseconds, faster than blinking an eye
🏭 RFID landing application scenarios
✅ retail industry
ZARA、 Uniqlo fully utilizes RFID technology
No need to scan one by one, read the entire box through the channel door
Inventory efficiency increased by more than 10 times
✅ Warehousing and Logistics
The package passes through the sorting line, and the RFID automatically identifies its destination
DHL、 Logistics companies such as SF Express have widely applied it
Do not unpack or search, read the entire pallet in seconds
✅ Manufacturing production line
Automatic collection of automotive and electronic product components
Record assembly information and quality data
Data is automatically uploaded without the need for manual intervention
✅ medical industry
Surgical instrument tracking, drug anti-counterfeiting traceability
High value medical equipment asset management
Whether the surgical kit is complete, you can tell at a glance
✅ Transportation
ETC non-stop toll collection
Bus and subway cards pass through the gate in seconds
✅ asset management
Inventory of Fixed Assets in Enterprises and Institutions
Handheld PDA scan, batch identification of dozens of assets, inventory of thousands of assets completed in minutes
💡 Limitations of RFID (also need to know)
❌ High cost: Special materials such as metal/liquid environment resistant tags and high-temperature resistant tags can cost several yuan or even tens of yuan per unit
❌ Environmental sensitivity: Metals reflect signals, liquids absorb signals, and interfere with recognition rates
❌ Inconsistent standards: No interoperability between different frequency bands and protocols
one-sentence summary
Barcode: Scan only when you see it, one by one
RFID: Can be read from a distance, batch by batch
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Mr.Li
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