Static and rotational torque sensors

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June 2019 Sensors & Transducers

With the new compact 8661 series of torque sensors, Burster has extended its portfolio to include static and rotating torques over the range from 0,05 to 200 Nm. In addition to the highly accurate measurements, the sensors offer excellent reliability and security. This also applies to the version with optional measurement of angular position and rotation speed where the torque sensor offers a resolution as fine as 0,09°. An optional USB interface provides easy mobile display and documentation of the measured values.

This sensor comes into its own in fields such as precision and micro-mechanics, test bed equipment for electric motors, or in the automobile industry where torque and associated angular position and rotation speed are important process magnitudes.

The signal from the full bridge strain gauge signal is digitised at the shaft itself and is converted into a 0 to ±10 VDC signal by a 16 bit D/A converter located on the stator. In light of the need to minimise the necessary servicing cycles, the power is supplied inductively while the measured signal is transmitted optically. As a result, the measurement is obtained without any wearing parts and a high immunity to interference is ensured. The maintenance-free operation and the increased capacity to handle high rotational speeds make this series in sensors ideally suited to efficient application in industrial manufacturing and assembly equipment where activation, adhesion, breakaway and tightening torques must be measured.

Continuous operation and a high dynamic range of up to 25 000 RPM are supported effortlessly by the optimised mechanical design. A high resolution output signal for the optional angular displacement and rotational speed measurement facilities is achieved through optical sensing of an incremental encoder disk that incorporates two offset tracks and four-edge sampling. An operating status display (green/yellow/red LED) gives the user a range of status information, which simplifies commissioning.

The USB interface and the PC-based software permit convenient operation away from mains power, as well as mobile application for field measurements. A driver package for linking into custom user’s own programmes is included free of charge.

For more information contact Anastas Schnippenkotter, ASSTech Process Electronics & Instrumentation, +27 11 708 9200, [email protected], www.asstech.co.za

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Sensors & Transducers

Static and rotational torque sensors

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