### Research Report: Existing Frameworks for RFID Tag Collision Detection

#### Frameworks for RFID Tag Collision Detection

1. **Arduino RFID Library**
   - Provides basic communication functions with RFID tags, including collision handling.
   
2. **MFRC522 Library**
   - Specifically designed for the widely used MFRC522 RFID chip, offering tag identification and collision handling functions.
   
3. **SparkFun Simultaneous RFID Tag Reader Library**
   - Supports collision detection for the Simultaneous RFID Tag Reader, designed for easy integration into Arduino projects.
   
4. **Seeed Studio RFID Library**
   - Compatible with various RFID modules from Seeed Studio, supporting collision detection.

*Note*: Collision detection is often automatic with RFID chips and readers, but specific implementation may vary depending on the module used.

#### Devices Capable of Multi-Scanning

1. **Impinj RAIN RFID-Reader**
   - Known for advanced features including simultaneous reading of multiple tags.
   
2. **ThingMagic RFID-Reader**
   - Industrial-grade readers supporting multi-scanning, capable of handling numerous RFID tags simultaneously.
   
3. **Alien Technology RFID-Reader**
   - Designed for efficiency in handling a high volume of RFID tags across various industries.
   
4. **Zebra RFID-Reader**
   - Built to read multiple tags simultaneously, part of Zebra's automatic identification and data capture solutions.
   
5. **Honeywell RFID-Reader**
   - Offers RFID readers for diverse applications, including those supporting multi-scanning.

#### Example Projects (Arduino)

- Basic RFID scanner example program (link provided).
- Exploring the possibility of miniaturizing an RFID scanner to fit within 10mm^2, potentially wearable on a finger.
- Identified small-sized RFID scanners (approx. the size of two fingers) from SparkFun Electronics.
- Mentioned a potentially suitable RFID reader (link provided), seems expensive.

#### Potential Ideas

- Placing Arduino on a table and using a handheld scanner connected via cable.
- Developing a handheld/wearable RFID scanner, although integration methods with Arduino remain unclear.