Testamatic Systems Pvt. Ltd

CNI Test Bench

CNI Test Bench

The developed test software is used to test the Motor(UUT) performance. These units are used in cars to slide the car windows.

Challenge

• High speed data acquisition from torque, current and position sensors.
• LIN Protocol to rotate Motors.
• Simultaneously monitor and capture Voltage, Current, Speed, Torque by maintaining the LineResistance.
• Plot Current, Torque and Speed.
• Store and Analyse large set of test data.
• OPC to PLC Communication
• Reject the motors on failure

Solution

• The LabWindows/CVI test software is used to test the performance of the Motor.
• NI PCI cards were used to acquire data from the torque sensors, Power Supply etc.
• NI LIN module was used for LIN communication.
• Implementation of MultiThreaded Programming to acquire data simultaneously.
• Linearisation algorithm was implemented in order get the required plot.
• The acquired set of data is stored in files(.csv) and the summary of the test is stored in MySQL database.
• RSLinx OPC to communicate between IPC & PLC and vice versa.
• The motors will be tested thrice on failure before rejecting the Motors

Impact to Customer

• The test software can test two types of motors.
• Many hardware errors were rectified.
• No manual intervention.