Telemetric load cell e.g. compression load cell, for electrically measuring negative and positive injection forces at plastic-injection molding machine, has module, where signal is wirelessly transmitted to module by amplitude modulation

摘要

The cell (1) has a strain gauge (9), an amplifier (10) and a transmission module (13) i.e. wireless module, inductively energized by two magnetically coupled oscillator circuits by primary coils (12) and secondary coils (11). The cell is directly attached behind a rotary worm gear. The worm gear is rotationally driven by a motor and a drive. A force signal (8) is wirelessly transmitted to an energizing and receiving module (7) by alternating amplitude modulation. The transmission module is based on Bluetoothtechnology.