Static torque transducer goes to new lows
A
Novatech Measurements product story
Edited by the Engineeringtalk editorial team
Mar 3, 2003
Earlier this year, Novatech Measurements officially launched the F311 static torque transducer and has already improved on the design.
Earlier this year, Novatech Measurements officially launched the F311 static torque transducer and has already improved on the design.
The company has now manufactured two F311-Z3075 static torque transducers with a very low torque range of 10mNm.
The low torque range was designed for a specific application to measure the torque reaction within an automotive instrumentation dynamometer.
This low torque range was made possible using a clever double-bending beam-sensing element.
This enables the company to achieve a high enough strain level and hence signal from such a very low torque.
This design also has very good EFI (extraneous force immunity).
The static torque transducer is mounted to "earth" via the three fixings in the outer ring, with the torque being transmitted though the centre boss.
The performance of the transducer exceeded Novatech Measurements' expectations in many respects.
The customer's fittings within the dynamometer exerted a radial side load of 7g on the loadcell.
This may sound small, but the fact that 10mNm is roughly equal to 20g on a 50mm moment arm illustrates the scale involved.
However, the loadcell's excellent EFI characteristics helped it achieve an error of only 0.026% RT from the 7g side load.
The overall performance is also very good with a typical nonlinearity of 0.036% RT.
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