Shaft horsepower meter

Torsion sensor

Torsion sensor
High Sensitivity Displacement sensor

Sensor sensitivity determination accuracy：+/-0.15％

Sensor sensitivity characteristics are semi-permanently unchanged

Metal strip used for sensors has excellent repeated stress characteristics


A high sensitivity displacement sensor with a minimum resolution of 0.05 microns detects the extremely small amount of shaft torsion that occurs between only 70mm of the shaft.

 

The sensor is structured as shown in the lower left figure, and the metal strip stretched between point A and point B continuously vibrates at the natural frequency determined by the tension of the metal strip.  The vibration is caused by the excitation force of the magnet coil and the amplifier. 

 

Distance “L” between the ends A and B changes in accordance with changes in shaft torsion. Accordingly, the tension of the strip and this causes the natural frequency, which depends on the tension, to change.

Structure of the torsion sensor
Structure of the torsion sensor