The application of RFID in unmanned vending machines
The application of RFID technology in unmanned vending machines mainly achieves automation and intelligence of the retail process through the following ways:
1、 Core technical principles
1. Product identity binding
Each product is equipped with an ultra-high frequency RFID tag (with a minimum size of 3mm x 3mm), which stores a globally unique code and can withstand temperature differences ranging from -25 ℃ to 70 ℃. Tags support non-contact recognition, allowing for direct reading through packaging materials without the need for manual scanning.
2. Dynamic perception and settlement
The vending machine is equipped with a multi band reader/writer array that continuously emits RF signals to activate tags. When customers pick up the goods, the system completes batch recognition and automatic deduction within 0.3 seconds, and can process over 100 item movement trajectories in a single transaction.
3. Anti theft and abnormal handling
The door channel reader triggers an audible and visual alarm when detecting unsettled goods, and activates the face tracking system when the label is forcibly peeled off. Setting up a 'hesitation zone' allows customers to return goods without charging, reducing the misjudgment rate to below 0.2%.
2、 Optimization of operational efficiency
1. Upgrade inventory management
RFID intelligent shelves monitor the stock of goods in real time, automatically place orders with suppliers for replenishment when the inventory is below the threshold, reducing the out of stock rate by 60% and reducing manual inspection distance by 78%.
3、 Scenario Practice Case
• Fresh food management: Short term products such as dairy products use low-temperature resistant labels to monitor their expiration dates in real time and trigger expiration promotions.
Dynamic pricing: Automatically adjust prices based on the frequency of product pickup (such as a 300% increase in sales after a 15% price reduction).  
4、 Key implementation points
1. Label selection: Beverage products require anti liquid interference labels, and metal packaging products are recommended to use anti metal labels.
2. System stability: Data storage should exceed 72 hours during power outages, and payment system response delay should be controlled within 0.5 seconds.
3. User experience: If the settlement prompt sound is below 45 decibels, the suspicious alarm will switch to silent tracking mode to avoid disturbing customers.
With the popularization of dual-mode chip printing technology (no need for separate labeling), RFID will be deeply integrated into the product packaging itself, promoting the iteration of unmanned vending machines towards zero contact and high ping efficiency