Q15Internet of Things
Question
4 marks
How is RFID used in inventory management systems?
Answer
An architectural review of RFID in Inventory Management. Explains how passive tags harvest electromagnetic energy from readers to instantly transmit unique mathematical EPC codes, completely annihilating manual barcode scanning.
Before IoT, massive warehouses utilized Barcodes. A human had to physically find a box, mathematically align a laser with the lines, and scan it one by one. Radio Frequency Identification (RFID) violently destroys this horrific bottleneck using electromagnetic physics.
The Execution Mechanism
- The Passive Tag: Every single pair of shoes manufactured gets a microscopic, 10-cent Passive RFID tag embedded in the sole. This tag has absolutely NO battery. It contains a tiny silicon chip storing a mathematically unique 96-bit Electronic Product Code (EPC).
- The Massive Reader: A giant RFID portal is installed at the warehouse loading dock.
- The Electromagnetic Harvesting: When a forklift drives a pallet of 500 shoes through the portal, the Reader blasts a massive electromagnetic wave. All 500 passive tags mathematically harvest the physical energy from the wave, power up their chips, and violently scream their 96-bit EPCs back to the reader simultaneously.
- The Cloud Update: The Reader executes Anti-Collision mathematical algorithms to isolate the 500 distinct IDs in a millisecond. It blasts this JSON payload directly into the SAP ERP cloud database.
The Business Impact
Inventory processing time drops from 3 hours to 1.5 seconds. Absolute mathematical accuracy is achieved. The cloud database knows the exact GPS location of every single shoe in the global supply chain.