Endurance and Environmental automated test system for electro-mechanical sub-system

(image is representative, not actual)

Endurance and Environmental automated test system for electro-mechanical sub-system

Automating tests that run for weeks at a time

Client – Automotive component supplier

Challenge

Our client was already doing validation, but it was manual, and the client’s customer started requesting faster turnaround of results. Their customer was also requesting data to be sent with the results. Our client chose to automate the validation process to enhance their productivity.

Solution

Viewpoint utilized the (mostly) existing hardware from the manual tester and developed software to automate the testing. The LabVIEW-based automated test system allows for endurance & environmental validation testing of an electro-mechanical sub-system.

Benefits

  • Automates tests that run for weeks at a time
  • Logs errors during the test (e.g., for continuous monitoring tests, logging the number of instances of when a UUT’s LIN (Local Interconnect Network) response deviates from a static, current draw outside of limits)
  • Capable of testing a large variety of product lines
  • Logs pertinent data to a database for post-test analysis/inclusion into reports

System Overview

The UUT is an electro-mechanical part that falls under a variety of different product lines.  As such, the client had a couple variants of the tester, based on the communication needs of the UUT. A total of more than a dozen testers were deployed.  The functionality of the tester evolved over time, specifically modifying software to make the tests faster / decrease cycle time.

SOFTWARE FUNCTIONS
Extensive diagnostic/manual operation of system for debug of software and electrical connections between the UUT and the test stand/tooling.
Product-specific software components to operate unique products.
Execute mechanical endurance tests.
Execute environmental endurance tests.
Database output containing results from every test cycle (either mechanical cycles or time depending on test being run).
HARDWARE USED
USB-LIN module
USB and PCI CAN Interfaces
Analog input card
Digital Input card
Digital Output card
Power Supplies
DMMs
Switch Matrix
INTERFACES / PROTOCOLS
CAN
LIN
USB
GPIB
2019-04-19T06:50:59-05:00