NFER® Proximity Detection & Collision Avoidance System


Q-Track's PDS protects your team from moving machinery, even behind obstructions, around corners, and beyond line-of-sight.

Q-Track’s PDS protects your team from moving machinery, even behind obstructions, around corners, and beyond line-of-sight.

Q-Track’s NFER® Proximity Detection System (PDS) provides location awareness and collision avoidance capability for automated equipment like overhead cranes.  The system is designed for applications where line-of-sight collision avoidance is not adequate.  PDS has been particularly effective for fast moving overhead cranes on a factory floor.  Line-of-sight systems can not detect employees around corners, bending over, or hidden behind a pallet.   The NFER® PDS enhances worker safety by triggering an alert or automatically shutting down equipment that might be too close.

NFER® PDS operates by using low-frequency, long-wavelength AM band radio waves.  These low frequency waves diffract around corners or objects such as pallets.  The proximity detection is achieved by utilizing Near Field Electromagnetic Ranging (NFER®) technology.

The NFER® PDS Locator-Receiver can be configured to automatically shut down moving equipment that comes too close to workers, then restart the equipment once workers are a safe distance away.

The NFER® PDS Locator-Receiver can be configured to automatically shut down moving equipment that comes too close to workers, then restart the equipment once workers are a safe distance away.

In a factory environment with a swiftly moving overhead crane, the employees wear NFER® tags that emit a low-frequency, long-wavelength signal.  The overhead crane has a NFER® PDS Locator-Receiver that detects the signal and determines its location.  In a typical customer application, when the PDS Locator-Receiver determines it is within 3m (10ft) of a worker, the PDS Locator-Receiver sends a message to stop the crane. Once a worker has moved a safe distance awy, the Designed to detect multiple tags simultaneously, the PDS keeps the environment safe despite the number of workers present. Range is adjustable out to a maximum of 15m (50ft) but depends on the RF noise at the installation point on the crane or equipment.

Website Banner-2The NFER® PDS Locator-Receiver can work in a variety of other configurations besides overhead cranes.  For example, where forklift operators are traveling perpendicular to each other on a collision course, but the pallet-filled racks prevent the operators from seeing each other, or pedestrians, the NFER® PDS can provide an early warning. The NFER® PDS Locator-Receiver integrates easily with automated cranes, forklifts, and other industrial equipment.

The NFER® PDS consists of a NFER® PDS Locator-Receiver for attachment to an overhead crane, forklift, or other moving machinery, and NFER® PDS Tag Transmitters to be provided to team members working in areas where collisions might happen.

For more information, see: “RFID Helps Halt Collisions Between People and Robots,” RFID Journal, May 25, 2012.

Discover how Q-Track’s NFER® products work together to solve your indoor location problems, or contact Q-Track for more information.

The NFER® PDS Locator-Receiver keeps workers safe from overhead cranes and moving machinery at dozens of installations, nationwide.

The NFER® PDS Locator-Receiver keeps workers safe from overhead cranes and moving machinery at dozens of installations, nationwide.

NFER® PDS Locator-Receivers sound an alert or shut down moving equipment that comes too close to an NFER® PDS Tag-Transmitter.

NFER® PDS Locator-Receivers sound an alert or shut down moving equipment that comes too close to an NFER® PDS Tag-Transmitter.