AGENDA…AGENDA…

• Introduction to IR Brad Risser

• Camera Operation / Post Analysis Capabilities Jim Hungerford

IR is generated by the vibration of electrically charged particles IR travels through space at the speed of light The difference between light and IR is wavelength

Infrared Radiation…

IR is emitted by all objects IR radiation is minimal at low temperatures

IR radiation increases with temperature

IR Theory

2 Types of Analysis

QualitativeQualitative – Comparative analysis

IR Theory

Qualitative…

*>36.5°C

*<24.6°C

26.0

28.0

30.0

32.0

34.0

36.0

*>55.0°C

*<24.6°C

25.0

30.0

35.0

40.0

45.0

50.0

55.0

*>46.1°C

*<15.0°C

15.0

20.0

25.0

30.0

35.0

40.0

45.0

>65.0°C

<-20.0°C

-20.0

-10.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

Which is Hotter?

IR Theory

2 Types of Analysis

QualitativeQualitative – Comparative analysis

IR Theory

QuantitativeQuantitative – True temperature measurement

Quantitative…

IR Theory

How Hot?

Spot 10 43.3

Area1Min Mean Max 33.0 42.5 44.7

Area1Min Mean Max 33.0 42.5 44.7

Spot 11 39.4

*>46.1°C

*<15.0°C

15.0

20.0

25.0

30.0

35.0

40.0

45.0

Why does Infrared work for Research & Development?

• Non Contact Temperature Measurement (no thermal couples, non-destructive means of testing)

• Quick / Easy to Interpret Results(more meaningful than data)

• Raw Data Available

• Can Resolve Small Targets (12 Microns) and small temperature changes (<2 degrees C)

• Dynamic or Still Digital Acquisition

• Valuable Historic Reference

Loose connections, poor contact, or shorts can result in hot spots.

PCB Inspection

Known Good

One Fault

Five Faults

Acquisition and Analysis

• Static Image AnalysisStatic Image Analysis Full analysis capabilityFull analysis capability

• Real Time AnalysisReal Time Analysis Time versus temperatureTime versus temperature Image subtraction Image subtraction