Operating cable-connected or battery-powered measurement systems in hard-to-reach installation locations and challenging environments often poses safety concerns, is too complex or downright impossible. Radio frequency identification (RFID) sensors make the wireless, maintenance-free measurement of temperature and other physical parameters in such situations possible. Developers from Fraunhofer IPMS Dresden now offer a flexible, multi-tag RFID sensors system concept which has also been tested in metal environments.
RFID sensors successfully operate in difficult-to-access or fast, rotating environments in which other measuring devices fail. RFID tags fitted with sensors use the electromagnetic field of a reader as their source of energy and are therefore maintenance-free, because they don't have their own power supply. The flexible RFID monitoring system developed at Fraunhofer IPMS measures and evaluates application-specific parameters in order to determine, for example, the risk of plant failures. In concrete application, this allows for the decrease of maintenance and downtimes and the increase of plant availability. Recent testing has shown that the system also works reliably when integrated in permanent installations in metal environments. In addition, the current version is multi-tag-capable at a distance of up to two meters, making it possible to record several sensor tags simultaneously.