Description

SGR510 Torque Transducer – Torque Measurement only

SGR511 Torque Transducer – Torque, Speed & Power Measurement (60 pulses per revolution encoder)

SGR512 Torque Transducer – Torque, Speed/Angle & Power Measurement (360 pulses per revolution incremental encoder)

Operating Principles

The SGR series transducers operate using a four-element strain gauge wheatstone bridge, which is connected to a miniature shaft mounted analog to digital converter and microcontroller. The microcontroller conditions and measures the strain gauge bridge output as close to the gauges as possible, eliminating any possible external noise pick up in the gauge wiring.

The shaft mounted electronic module is wirelessly powered by a radio frequency source which drives a stator coil, the output of which is received by a rotor coil on the shaft thus making the system completely contactless. This eliminates the need for slip rings and their associated wear and noise problems.

The shaft microcontroller outputs a digital serial stream that is transferred back from rotor to stator by modulating the impedance of the rotor coil and detecting the impedance changes at the stator coil. A secondary high-performance microcontroller receives the serial stream from the shaft microcontroller, which then performs calibration and temperature compensation before outputting the results digitally via RS232, CAN bus or USB. A 16-bit digital to analog converter also outputs the sensors data as a fully calibrated and compensated analog voltage or current.

Key Benefits

• Transducer range from 175mNm through to 13,000Nm
• Minimal side and end load errors
• Low Linearity deviation of ±0.05% FSD
• Low Hysteresis error of ±0.05% FSD
• Zero variation in torque signal with rotation (Cyclic Variation)
• Non-contact signal transmission, no slip rings to wear out.
• High digital sample rate of 4,000 samples per second
• Speed measurements/Angle/Power computation
• Wide Power Supply range 12-32vDC

TorqSense SGR51x Series transducers offer:

• Fixed analogue voltage or current outputs. 3 channels available, assignment depending on model.
• BIT Self-diagnostics for letting the manufacturer know that the transducer torque or speed ratings have not been exceeded and the transducer’s last calibration date
• Sensors to monitor shaft temperature for better compensation and accuracy
• Transducer status LED and simple ‘Sensor Status’ output pin, provides transducer health feedback.

Torque ranges available at any full scale torque: 1Nm to 13,000Nm, with above 13,000Nm on request.

First Annual Recalibration is included in the purchase price. Units must be returned to Omni Instruments for Recalibration