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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
= r x F
Lever arm length (m)
Force (N)
Torque (N.m)
Torque MeasurementThe 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.
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.
torque sensor
Driver
Loadflexible coupling
System Proposed
NI BASED MEASURMENT SYSTEM
NI Based Measurement System
+
NI cRIO
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
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)
NI Based Measurement SystemNI 94218-Channel 24 V Logic, 100 µs, Sinking Digital Input Module8-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 NI 94728-Channel 24 V Logic, 100 µs, Sourcing Digital Output Module8-channel, 100 µs digital outputD-Sub or screw-terminal connector options6 to 30 V range, sourcing digital output-40 to 70 °C operating rangeHot-swappable operation
NI Based Measurement SystemCOSTNI cRIO-073 8-Slot, 2M Gate Compact RIO Integrated Chassis Controller 110,000.00
NI 92154-Channel, 100 kS/s, 16-bit, ±10 V Simultaneous Sampling Analog Input Module 40,000.00
NI 9421 8-Channel 24 V Logic, 100 µs, Sinking Digital Input Module 7,500.00
NI 9472 8-Channel 24 V Logic, 100 µs, Sourcing Digital Output Module 7,500.00
165,000.00VI SW-TM Application Software development 200,000.00
365,000.00
NI Based Measurement System
NI Based Measurement System
NI Based Measurement System
NI Based Measurement System
NI Based Measurement SystemCONTACTVI AUTOMATION (P) LTDC/2, APNA GHAR HOUSING SOCIETY,SHANKARSHETH ROAD, PUNE 411042PH: + 91 20 6400 2256 / 7FAX: + 91 20 2645 [email protected]
