NI’s PXI platform is great for systems that require the wide range of test instruments that PXI supports, or that need the processing power of a PXI controller. PXI data acquisition hardware is capable of handling 1000s of digital and analog I/O. PXI test systems can process massive amounts of data with the latest CPUs or with some of the largest Xilinx FPGAs.
Viewpoint has used PXI for test applications revolving around:
We’ve utilized a lot of PXI modules, including:
Multifunction reconfigurable I/O
Digital multimeter (DMM)
Programmable power supply
source measure unit (SMU)
vector signal generator
signal insertion switch
Want more proof points? Check out these PXI case studies:
Our client already had a test system in place, but the tester (really two test systems testing two different product variants) was becoming obsolete. The tester was old, hardware was failing, and it was getting harder and harder to keep it reliably running. They wanted a new tester to improve reliability, but maintain the functionality of the existing tester to keep the FDA-mandated verification and validation time to a minimum.
The updated end-of-line manufacturing test system maintains the functionality of the old test systems, but with updated hardware and software. The same software is utilized for both the manual test system update and the automated test system update. Our client deployed 6 manual testers and 1 automated tester.
- Improved maintainability and reliability with updated hardware and software
- Maintains existing test system functionality to keep certification time down
There were two variants of the new test system. One was for an older product line that utilized manual test, with an operator that connected/disconnected the UUT, and initiated the test. The other was an automated tester, integrated into a manufacturing machine. Both testers utilized custom fixtures (provided by the client), off-the-shelf NI measurement hardware (selected by Viewpoint), and custom test software (developed by Viewpoint). The software is configurable for both the manual test system and the automated test system.
|Read UUT limits from config file|
|Perform tester self-test|
|Measure UUT output|
|Perform leak down pressure test|
|PLC interface (for automated tester) for start, done, pass, fail|
*- images are conceptual, not actual
|LabVIEW RT – for managing the microcontroller functions and overall data collection and safety monitoring|
|Microcontroller application – to provide precision pulsing of the batteries|
|Communicate to the host PC – to both receive pulsing instructions and configurations and to return pulse waveforms for each battery tested.|
|MAIN HARDWARE COMPONENTS|
|PXI chassis & controller|
|PXI analog input modules|
|SCXI multiplexing switches|
|INTERFACES / PROTOCOLS:|