CARTLOCK™: Infrared Retrofit Checkout Cart System with Segmented Reflective Liner and Secure Bag Control

CARTLOCK™ is a retrofittable intelligent checkout system that transforms standard shopping carts into semi-autonomous checkout devices. The system uses a rectangular infrared scan frame mounted at the cart basket opening, enhanced by a segmented reflective optical boundary liner and integrated BagLock secure bag system. Items are detected as they enter and exit the cart with improved accuracy. The segmented reflective liner maintains consistent optical performance, reduces false triggers from internal cart movement, and significantly decreases double-scanning errors. Customers complete purchases at a secure GateLock payment station, which verifies inventory, processes payment, releases the BagLock, and unlocks exit upon successful payment. This architecture bridges traditional checkout and fully autonomous retail without requiring full store infrastructure replacement, while adding strong anti-shrink protection and improved customer experience through secure bag handling.