Sensor Technology Ltd develops a non-contact torque measuring transducer, which has a potential accuracy of one part in a million. The transducer, called Torqsense, makes use of the Surface Acoustic Wave (SAW) phenomenon.This SAW approach has allowed the development of small transducers, which are not only exceptionally accurate, but more importantly, require no physical contact between the revolving shaft and its housing.
The SAW transducers are self-contained and require no physical connection to the shaft`s housing. Instead the signals are exchanged via a capacitive coupling device comprising of two discs, one of which rotates with the shaft while the other is stationary.
On this basis, the torque can be measured to an accuracy of one part in a million. Applications include Automotive, Aerospace, Viscosity and Consistency Measurement, and Motor and Machinery Control and Condition Monitoring.
February.2002
Sensor Technology Limited
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