for the wireless transmission of measured values Ideal for condition monitoring and predictive maintenance Discover new possibilities with the wireless transmission of measured values Predictive maintenance needs measured data to the greatest possible precision. On components with moving or rotating parts, the relevant variables (e. g. temperature of an electric motor’s rotor or planetary gearbox bearing) sometimes cannot be accessed with wired sensors. Accordingly, the data needed for condition monitoring can be obtained only with complex cal- Your benefits at a glance ■■NORIFID measures values on moving parts ■■Reliable, robust RFID data transmission (13.56 MHz) ■■Maintenance-free system (transponder without battery) ■■Compact system with small installed height ■■No large analysis unit necessary ■■Low cost and reliable thanks to established technologies ■■Various output signals culations and estimates. However, precise and reliable measured data are obtained only when a sensor is placed directly on the moving part. For requirements of this kind we have developed NORIFID, a simple, cost effective measuring system that is based on established technologies, supplies wirelessly power by induction to a sensor on a moving part, and transmits the measured data via RFID to a fixed receiver. System setup NORIFID consists of a reader that is fitted on the fixed component and a transponder with measuring element attached to the moving component. This measuring element can be a fixed inte- Functional principle gral part of the transponder or, if necessary, placed outside at the Power and data are transmitted wirelessly by induction, via an RF measuring site and wired to the transponder. magnetic field (13.56 MHz RFID). The reader consists basically of a transformer, analysing electronics, and a signal converter and is supplied with voltage from an external source. The transponder likewise is fitted with a transformer, an integrated circuit, and a Pt100 measuring element and is installed on the moving object. It operates passively and therefore does not require its own power supply. The transponder positioned on the rotating object moves cyclically past the reader. When the transponder enters the reader’s range, the reader‘s alternating magnetic field induces a voltage in the transponder coil, supplying it with the necessary power. Once the transponder is in the reader‘s active zone, its connected Pt100 measuring element detects the temperature and transmits the measurement value immediately and wirelessly Transponder Pt100 Measuring element (Measuring point) Figure 1: Scheme for wireless transmission of measured values to the reader. Depending on the requirements, the reader then converts and outputs the measurement signa

Standard transponder variants General technical data of the NORIFID wireless sensor system Operating voltage (reader) Number of measuring channels Measuring range -40 ... 300 °C (application-specific within the measuring range) Signal transmission 8.6 bit, depending on the measuring range and channels Output signal 4 ... 20 mA (3 mA for error indication on request) Reverse voltage protection Overvoltage protection Operating temperature Reader: Transponder: Protection class Transmission distance (reader - transponder air gap) Passing speed Max. 20 m/s for 5-channel (standard) Max. 30 m/s (depending...

Application examples Your application, our ideas with predictive maintenance that is to safeguard the reliability, operability, and availability of systems. Drawing up prognoses Initial state after repair or elimination of weak points Initial state after manufacture Wear margin Today, the development of new products can no longer do away Condition-based maintenance and trend analyses on the condition of separate components, as- Preventive maintenance sessing the progress of component wear (cf. Figure 5) under the Last possible point in time for maintenance without overhauling prevailing operating...