![]() The program reads the details of the individual test steps, typically 900 in number, from an Excel file. After entry of a serial number and other test details in the “start screen” of the LabVIEW program, the test begins. The unit under test is inserted in a “pocket” on one side of the test system. The PXI system is housed in a 19″ rack along with a keyboard and mouse, CD-ROM drive and power supply for the anti-skid system under test. ![]() This included a PXI-8176 1.26GHz Pentium III embedded controller, PXI-5102 scope card, PXI-5401 function generator, PXI-4060 DMM, PXI-6704 analogue output card and PXI-6508 96-channel digital card. Working with National Instruments, we suggested a PXI system (see photograph) for the basis of the test system. The whole process would take an experienced engineer around 4 hours to perform, depending on the test.Īircraft Braking Systems contacted National Instruments about supplying an automated test system, and National Instruments recommended a LabVIEW developer from LiveWires for the associated LabVIEW programming and systems integration work. ![]() Values read from meters or from an oscilloscope were recorded by hand on a results sheet. Electrical connections were made by hand along with the operation of numerous switches and potentiometers. Until recently, these tests were performed with a manual test set. To ensure this reliability, extensive electrical tests need to be performed, both of the individual boards and of the whole system when fully assembled. These systems are extremely rugged, capable of withstanding extremes of temperature and very reliable long-term. Aircraft Braking System Europe Ltd manufacture an anti-skid system which is a much more sophisticated equivalent of the ABS system found on cars. ![]()
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