Active RFID: Definition, Function, How it Works, and Applications
- Marketing Tudi
- Oct 8
- 3 min read
Active RFID is a type of RFID technology that uses tags with internal battery power, enabling them to actively transmit signals to a reader. This technology is often used for remote asset tracking, vehicle monitoring, and security systems, as its range can reach tens or even hundreds of meters.
Understanding Active RFID
Active RFID is a radio wave-based identification system that uses tags with internal batteries to actively transmit data. Unlike passive tags, which only respond when they receive energy from a source. reader, active tags periodically emit signals that can be detected by the reader even if it is not directly nearby.
The main difference between Active RFID and Passive RFID lies in power and range. Active tags are more expensive and bulky due to their battery requirements, but they offer real-time tracking performance over a wide area, making them highly relevant for industries that require continuous asset visibility.
Active RFID Function
Active RFID not only serves as an identification tool but also supports automation and security of business operations. Its functions are as follows:
1. Real-Time Asset Tracking
Active RFID allows companies to monitor the location of assets in real time. With a long read range, the movement of goods or vehicles can be tracked at any time.
2. Movement Monitoring
This technology detects the movement of assets in and out of a specific area. For example, in a warehouse, the system automatically records when goods leave the area for distribution.
3. Increase Security
Active RFID can be used in access control for both employees and vehicles. Signals from active tags are automatically verified by the system, reducing the risk of security breaches.
4. Operational Efficiency
With automated logging, Active RFID accelerates logistics and inventory processes. Work time is shortened, human error is reduced, and labor efficiency is increased.
How Active RFID Works
Active RFID works by utilizing a battery-equipped tag. This tag actively sends radio signals to a reader, either periodically (beaconing) or when it comes within a certain range. The reader then captures the signals and forwards the data to the management system for further processing.
Because it's active, this system can read tags from a greater distance, even in complex environments. This makes it an ideal choice for monitoring mobile assets such as logistics vehicles, containers, and equipment over large areas.
Advantages of Active RFID
Before implementing, it is important to understand what the added value of Active RFID is:
1. Longer Reach
Can read up to tens or even hundreds of meters, far beyond passive tags.
2. Real-Time Tracking
Provides real-time asset location data to facilitate decision-making.
3. Larger Data Capacity
Chip Active tags are able to store more data than passive tags.
4. Environmental Flexibility
Remains effective in areas with metal or liquid interference which is usually a challenge for passive RFID.
Disadvantages of Active RFID
Despite its advantages, Active RFID also has a number of limitations that must be considered:
1. Higher Costs
Active tags are more expensive because they have an internal battery and larger storage capacity.
2. Larger Tag Size
Because there is a battery, the dimensions are larger than passive tags so they are not always suitable for all applications.
3. Limited Battery Life
Tags need to be replaced or recharged after a few years of use.
4. Implementation Complexity
Integrating Active RFID into a management system requires more complex configuration and additional reader infrastructure.
Active RFID Applications in Various Industries
Active RFID is used in various sectors with specific benefits according to operational needs:
1. Logistics and Transportation
Used to monitor the movement of containers, delivery vehicles, and long-distance mobile assets.
2. Manufacturing
Helps track raw materials and equipment across large production areas to keep processes running smoothly.
3. Mining and Construction
Track heavy equipment, vehicles, and workers in high-risk work areas.
4. Healthcare
Monitor mobile medical equipment such as wheelchairs, portable machines, and ensure patients remain in a safe area.
5. Security and Access Control
Used for vehicle or personnel identification with high accuracy and wider reading range.
Conclusion
Active RFID is a modern identification solution that offers advantages in read range, tracking speed, and data accuracy. With this technology, companies can gain broader, real-time visibility of assets compared to traditional methods.
Despite its higher initial cost and limited battery life, the benefits Active RFID offers in improving operational efficiency, security, and productivity make it a worthwhile investment.
As an end-to-end RFID solutions provider, TUDI ready to help you design and implement Active RFID according to industry needs. Consult with our team of experts to find solutions that are efficient, scalable, and ready to support your business growth in the digital era.
