Design, Development and Calibration of a Drive Wheel Torque Transducer for an Agricultural Tractor
An appropriate transducer unit for measuring the drive wheel torque of a tractor was designed, developed and calibrated. The unit adopts a design having an extension shaft mounted in between the rear wheel axle flange and rear wheel rim of a tractor. Resistance type strain gauges were bonded on t...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Universiti Putra Malaysia Press
2003
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| Online Access: | http://psasir.upm.edu.my/id/eprint/3737/1/Design%2C_Development_and_Calibration_of_a_Drive_Wheel.pdf http://psasir.upm.edu.my/id/eprint/3737/ |
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| Institution: | Universiti Putra Malaysia |
| Language: | English English |
| Summary: | An appropriate transducer unit for measuring the drive wheel torque of a
tractor was designed, developed and calibrated. The unit adopts a design
having an extension shaft mounted in between the rear wheel axle flange and
rear wheel rim of a tractor. Resistance type strain gauges were bonded on the
shaft circumferential surfaces into a Wheatstone bridge circuitry for a standard
torque measurement configuration. The bridge circuitry on each side of the
rear drive axle was interfaced to a data acquisition system on board a tractor
via a slip ring at the drive shaft end. Each transducer unit has been designed
for a torque range of 0 to 32 kNm with a sensitivity of 14.492 J.lStrain/kNm.
Static calibration tests on the transducer revealed excellent measurement
linearity and measurement accuracy with coefficients of correlation or R2 equal
to 0.9994 and 0.9994, respectively. The transducer hysteresis for static measurement was not significant. The transducer measurement errors were not
more than 0.20% and 1% of the measured torque magnitudes under static and
simulated dynamic measurements, respectively. Field demonstration test showed
that the measurement for the torque magnitude at the rear wheel of the tractor
was satisfactory. The data acquisition system had successfully scanned and
recorded the signals from both transducers. These transducer units are part of
the complete instrumentation system in the Massey Ferguson 3060 tractor to be
used in the generation of comprehensive database on the power and energy
requirements of the tractor-implement working in the field. |
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