Case Study
Washer / Dryer Controller PCBA Automated Functional Test System
This case focuses on vision plus electrical plus load plus communication. It is not a standalone machine vision product case; camera-based LED verification is integrated into a complete FCT system for appliance controller PCBA.
Case system visualAppliance controller vision and functional test system diagram
Test SoftwareInstrumentationFixtureDUTTraceability
Software, instrumentation, fixture, DUT and production data integration.Project Overview
Appliance controller PCBA functional test case integrating camera-based LED verification, optical fiber transmission, IPM power module, load simulation, relay, motor sensor, EEPROM, interlock, switch encoder and LIN/GEA communication into FCT.
Testing Requirements
- Perform LED test by camera.
- Cover optical fiber transmission, IPM power module test, load simulation and relay test.
- Verify motor sensor, EEPROM, interlock, switch encoder and LIN / GEA communication.
- Use NI LabVIEW to organize the test flow.
System Architecture
NI LabVIEW Test SoftwareCamera LED VerificationElectrical MeasurementLoad / Relay / SensorLIN / GEA CommunicationWasher / Dryer Controller PCBA
Key Test Items
LED Test by CameraOptical Fiber TransmissionIPM Power Module TestLoad SimulationRelay TestMotor Sensor VerificationEEPROM CheckInterlock TestSwitch Encoder TestLIN / GEA Communication
Engineering Challenges
- Vision-based LED verification needs to run together with electrical test, load simulation and communication test.
- One controller PCBA includes multiple functions such as power module, relay, motor sensor, interlock and encoder.
- GEA is presented only as a project communication item, without additional protocol interpretation.
Implementation
- NI LabVIEW is used to develop the test flow and station interface.
- Camera LED verification, load simulation, relay test, sensor verification and communication test are integrated into FCT.
- The case remains limited to project-supported functions and is not expanded into a general machine vision solution.
Engineering Outcome
- An automated functional test system was built for appliance controller PCBA.
- The case demonstrates how machine vision can be integrated into FCT.
- The project covers vision, electrical, load, sensor and communication validation.
Related Solutions
Related Engineering Capabilities
Machine VisionFixtureLoad SimulationCommunication
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