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TORQUE MEASURMENT

TORQUE MEASURMENT. Torque. Motion in which an entire object moves is called translation . Motion in which an object spins is called rotation . The point or line about which an object turns is its center of rotation . An object can rotate and translate. Torque. Lever arm length (m).

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TORQUE MEASURMENT

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  1. TORQUE MEASURMENT

  2. Torque • Motion in which an entire object moves is called translation. • Motion in which an object spins is called rotation. • The point or line about which an object turns is its center of rotation. • An object can rotate and translate.

  3. Torque Lever arm length (m) t = r x F Torque (N.m) Force (N)

  4. Torque Measurement • The test machine measures torque and angle of the shaft. • There are three sensors on the machine. Load cell measures force in tension and compression. Two encoders measure angle of two shafts. • The torque is product of load value measured by load cell and radius and cos Ǿ. • The angle Ǿ is difference of two angles measured by two encoders. • The force is 10000 kg (100KN), Angle is from 0 to 90 ° • The load increases from 0 to 100KN and back to 0 and angle from 0 to 90°. • The cycle time is 12 sec.

  5. Torque Measurement Sequence • Connect Load cell and two encoder to data acquisition card • Read signal from sensors • Display data in table form and graph form (torque v/s angle ) on line. • Storing data in database for future offline data retrieval and graphs. • Offline graph to have facility for displaying data of multiple samples • Store and retrieve, modify sample details. • 2-3 reports • All reports will have options for print-preview, print and export to other formats like • HTML and PDF. • Database backup and restore facility • Login screen for access control to the system.

  6. flexible coupling Load Driver torque sensor System Proposed NI BASED MEASURMENT SYSTEM

  7. NI Based Measurement System + NI cRIO

  8. NI Based Measurement System • NI cRIO-9073 • Integrated 266 MHz Real-Time Controller and 2M Gate FPGA • Rugged, embedded control and monitoring system • 266 MHz industrial real-time processor for control, data logging, and analysis • 2M gate, 8-slot FPGA chassis for custom I/O timing, control, and processing • 10/100BASE-T Ethernet port; RS232 serial port for connection to peripherals • -20 to 55 °C operating temperature range; single 19 to 30 VDC power supply input

  9. NI Based Measurement System • NI 9219 • 24-Bit Universal Analog Input • 250 Vrms channel-to-channel isolation • Built-in quarter, half, and full-bridge support • Built-in voltage and current excitation • Thermocouple, RTD, resistance, voltage, and current measurements • CJC per channel for accurate thermocouple measurement • 100 S/s/ch simultaneous inputs (50S/s/ch for Thermocouple)

  10. NI 9421 • 8-Channel 24 V Logic, 100 µs, Sinking Digital Input Module • 8-channel, 100 us digital input • Hot-swappable operation • -40 to 70 °C operating range • 12 to 24 V logic, sinking digital inputs NI Based Measurement System

  11. NI 9472 • 8-Channel 24 V Logic, 100 µs, Sourcing Digital Output Module • 8-channel, 100 µs digital output • D-Sub or screw-terminal connector options • 6 to 30 V range, sourcing digital output • -40 to 70 °C operating range • Hot-swappable operation NI Based Measurement System

  12. COST NI Based Measurement System

  13. NI Based Measurement System

  14. NI Based Measurement System

  15. NI Based Measurement System

  16. NI Based Measurement System

  17. NI Based Measurement System CONTACT VI AUTOMATION (P) LTD C/2, APNA GHAR HOUSING SOCIETY, SHANKARSHETH ROAD, PUNE 411042 PH: + 91 20 6400 2256 / 7 FAX: + 91 20 2645 1554 www.viapl.com kaustubh@viapl.com

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