Now envision the ability to monitor products, tools, medical equipment, or inventory throughout the entire time without having to replace the battery every few months. Ambient IoT and next-generation battery-free RFID are all about that promise.
There are already passive RFID tags that are used without batteries, by absorbing energy from a reader’s radio signal. Newer ambient IoT solutions build upon this by using extremely small amounts of energy from the ambient environment, such as radio-frequency signals, light, and movement. Consult with an expert who can guide you on RFID retail and get the best outcome.
What is Ambient IoT?
Ambient IoT is basically connected devices with very low power requirements that utilize energy in their environments.
These devices may be able to use batteries, but they could also incorporate:
- RF energy: Picking up energy from broadcasted radio stations in the vicinity.
- Ambient light: Small PV cells to convert indoor or outdoor light into electrical energy.
- Kinetic energy: The transformation of the power of motion, shaking, or mechanical action into useful energy.
- Energy from temperature differences: In some applications, collecting energy from temperature differences.
The objectives are to develop small, low-maintenance sensors that can detect, identify, and communicate information for a long time.
How Battery-Free RFID Fits In
For years, passive RFID has proven itself in a variety of ways, showing that the technology doesn’t always need a battery to run. A reader is used to send RF energy, which is then used by the tag to power its circuit and send back information.
The concept extends to ambient IoT. New devices do not necessarily rely on a dedicated reader to deliver all the energy – they may combine multiple sources of environmental energy and require very efficient electronics.
This may pave the way for connected sensing to be more viable with many low-cost objects.
What is Continuous Tracking?
Continuous real-time tracking does not necessarily mean battery-free.
The conventional passive RFID tag typically communicates when powered by a suitable reader. If the monitoring should be continuous or frequent, then the Ambient IoT device should have enough harvested energy and proper connectivity, and have the infrastructure to receive its transmissions.
As a result, there are two key points to consider when making your business decision:
- On-demand RFID identification
- Periodic sensing
- Event-based reporting
- Near-real-time monitoring
- Continuous connected tracking
The architecture that is appropriate is dependent on the application and available energy.
In what scenarios could this technology be useful?
Ambient IoT has the potential to increase monitoring in areas where batteries are costly or impossible to use.
Potential applications include:
- Retail: Keep track of products and stock with low maintenance.
- Warehousing: Monitor pallets, containers, and packages in large warehouses.
- Medical: Keep track of medical equipment and supplies and minimize battery replacements.
- Supply chains: Desensitize or tag expensive or disposable supply items.
- Smart buildings: Monitor assets and environment without extensive wires.
Major Advantage: Lower Maintenance
If there are thousands or millions of devices deployed, the replacement of batteries is difficult.
Designs that do not rely on batteries could lead to a reduction in:
- Maintenance labor
- Battery purchasing costs
- Device downtime
- Electronic waste
- Handling of battery replacement in logistics
Maintenance-free batteries can be as significant as low up-front costs in large deployments of IoT devices. Once you install an inventory RFID system, it will seriously improve your operations.
Here are Some Tips for Assessing Battery-free RFID
Before adopting the technology, businesses should:
- Document energy sources that are available: Record RF, Light, Vibration etc. sources.
- Determine the amount of energy available: Indoor places can experience vastly different conditions than outdoor places.
- Decide what reporting is needed: Do you need to read it occasionally or frequently?
- Real-world placement: Shelving, packaging, metal, and other materials can impact RF performance.
- Think infrastructure: Battery-less devices need readers, gateways, or an appropriate network.
- Analyze economics of scale: Calculate cost of the device versus installation and maintenance savings.
Ambient IoT and battery-less RFID are important advancements in connected technology: devices are becoming more capable of using energy that is already in the environment, instead of standard batteries.
New forms of ultra-low-power electronics could use RF signals, light, and motion to detect objects, gather data, and transmit information.
The tech can’t replace battery-powered IoT everywhere. Limiting factors such as energy availability, communication range, sensing needs, and infrastructure still apply. With the increasing efficiency of electronic devices, however, a battery-less Ambient IoT would make tracking massive numbers of devices more feasible, more sustainable, and more affordable.
