Understanding infrared thermography reading 3 part 1 of 2

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On-board capabilities include isotherm graphics features, spectral filtering. interchangeable optics for different total field of views. color or monochrome (black and white) displays, flexible video recording capabilities and computer compatibility. Most feature compact, field portable, battery operable sensing heads and control/display units. A complete system including battery and video recorder can be handled by one person by mounting the components on a cart or by assembling them on a harness. Charlie Chong/ Fion Zhang
● Focal Plane Array Radiometers Focal plane array radiometers are adaptations of military and aerospace forward looking infrared scanners. but are designed to measure the apparent temperature at the target surface and to produce quantitative thermograms. The capabilities of early infrared focal plane array imagers were slow in developing. The quality of measurement capabilities has improved since 1990. Infrared focal plane array cameras offer minimum resolvable temperature differences comparable to imaging radiometers (0.1 to 0.2 °C; 0.18 to 0.36 °F) and instantaneous field of views considerably better than imaging radiometers (1 mRad or better with standard optics). Commercially available quantitative infrared focal plane array cameras use detector arrays made of platinum silicide or indium antimonide, either of which requires cooling. Quantitative thermal imagers based on uncooled focal plane arrays (using bolometrie and ferroelectric detectors) have also been developed. With inherently faster response, no moving parts and superior spatial resolution infrared focal plane array cameras have been replacing infrared imaging radiometers for most applications. Charlie Chong/ Fion Zhang
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Infrared Thermal Testing Reading II
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Infrared Thermography Charlie Chong
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DEADLY French Military Mistral Anti
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LEAKED Body Scan Images From The TS
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Bf4 little bird ah-6j night vision
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Infrared Electrical Testing ■ htt
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Fion Zhang at Shanghai 29th May 201
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Charlie Chong/ Fion Zhang http://gr
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IVONA TTS Capable. Charlie Chong/ F
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Chapter 1 Principles & Theory Charl
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Keywords: Principles: • temperatu
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1.2 Fundamentals of Temperature and
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The three modes of heat transfer ar
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Temperature and Temperature Scales
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Temperature and Temperature Scales
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Boston Tea Party - New governances
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The Mighty Fahrenheit & ⅝”, Eng
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Conductive Heat Transfer Conductive
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Where: • Q/A = the rate of heat t
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Thermal conductivity is highest for
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Figure 1.2: Convective heat flow Ch
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The presence of the plate causes th
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R c is easier to use than h when de
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Figure 1.3: Infrared in the electro
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1.3 Fundamentals of Radiative Heat
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Figure 1.5: Infrared radiation impi
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Reflections off Specular and Diffus
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Transient Heat Exchange The previou
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Radiant Energy Related to Target Su
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Figure 1.6: Typical blackbody distr
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Wien's displacement law: λ max = b
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Figure 1.7: Three sets of character
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Figure 1.8: Spectral distribution o
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Figure 1.9: Components of energy re
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As the path length increases to mor
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When there is a solid material, suc
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Figure 1.12: Transmission curves of
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Convective Heat Transfer Convective
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Q1. At a temperature of absolute ze
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Q7. The mode of heat transfer most
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Q13. The peak emitting wavelength o
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Q19. The spectral band in which gla
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Chapter 2 Materials and Their Prope
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Emissivity Ɛ When using infrared t
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Reflectivity ρ Reflectivity of a s
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Transmissivity τ When the target s
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2.3 Heat Conducting Properties of M
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Heat Capacity The heat capacity of
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Thermal Diffusivity Diffusivily rel
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Partial Table 2.1 Charlie Chong/ Fi
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Thermal Diffusivity As in emissivit
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1. The best way to determine the ef
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7. Thermal diffusivity is: a. high
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Chapter 3 Thermal Instrumentation C
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What is Thermopile A thermopile is
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The Working Principle: Thermopile,
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IR Thermopiles Sensor (non-contact)
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Thermocouple General description: T
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Liquid or Gas Expansion Devices Man
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Liquid Crystal Thermometer A liquid
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Thermocouple Thermocouple grade wir
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Resistance Thermometers - Resistanc
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Platinum Resistance Thermometer htt
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Resistance Temperature Detector (RT
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RTD Configurations In addition to d
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The four-wire configuration consist
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Thermistor A thermistor is a type o
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Thermistor Charlie Chong/ Fion Zhan
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■ Thermochromic Liquid Crystals T
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■ Resistance Thermometers Resista
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■ Heat Flux Indicators Heat flux
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Pyrometer A pyrometer is a device t
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Brightness Pyrometers Charlie Chong
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3.4 Basic Configurations of Infrare
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Figure 3.1: Basic configuration of
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Figure 3.2 illustrates the spectral
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Discussion Subject: Why (or How) th
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Figure 3.2: Response Curves of Vari
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The cross section of this collectin
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Figure 4-7. The field of view (FOV)
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What is IFOV? IFOV (instantaneous f
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Figure 4-8. An IFOV measurement is
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Figure 3.3: Adding the scanning ele
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Figure 3.4: Line scanner scanning c
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Optomechanical Scanning To scan opt
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Electronic Scanning - Pyroelectric
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Focal Plane Array Imaging First int
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IRFPA - Large IR mosaic prototype a
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Infrared sensors with 3D ROIC for c
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Qualitative Versus Quantitative The
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Performance Characteristics of Poin
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Repeatability Repeatability describ
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Temperature sensitivity is also cal
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A typical speed of response specifi
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Target Spot Size and Working Distan
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This would take into account the sh
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EXAM score! D=σ∙d IFOV ratio = d
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Sensor Environment Sensor environme
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the following three classes of filt
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Thermographers have learned that a
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MWIR OR LWIR? For general purpose u
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Total Field of View (FOV total ) Fo
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Figure 3.10: Total field of view (T
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EXAM score! IFOV is also called; im
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Measurement Spatial Resolution Meas
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IFOV meas -SRF 95 SRF refers to: 95
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Frame Repetition Rate Frame repetit
Page 215 and 216: Thermal Imaging Display and Diagnos
Page 217 and 218: FOV - Animation Charlie Chong/ Fion
Page 219 and 220: Questions & Answers Subject: Answer
Page 221 and 222: Charlie Chong/ Fion Zhang
Page 223 and 224: 3.8 Descriptions of Thermal Sensing
Page 225 and 226: ■ Portable Handheld Devices Porta
Page 227 and 228: Figure 3.11: Hand held infrared rad
Page 229 and 230: Note that the laser beam docs not r
Page 231 and 232: ■ Online Process Monitoring and C
Page 233 and 234: IR Sensor Module Charlie Chong/ Fio
Page 235 and 236: IR Sensor Module Charlie Chong/ Fio
Page 237 and 238: ■ Devices with Special Configurat
Page 239 and 240: Two-color Pyrometers or Ratio Pyrom
Page 241 and 242: Two-color Pyrometers or Ratio Pyrom
Page 243 and 244: Figure 3-4: The “Two-Color” IR
Page 245 and 246: Figure 3-6: Radio Pyometry Via a Fi
Page 247 and 248: 2. Infrared radiometric microscopes
Page 249 and 250: Fiberoptic Coupled Pyrometers Charl
Page 251 and 252: It is not unusual to find line scan
Page 253 and 254: FLIR- Forward Looking Infrared Char
Page 255 and 256: Imagers (Thermographic Instruments)
Page 257 and 258: ● Electronically Scanned Viewers
Page 259 and 260: ● Staring Infrared Focal Plane Ar
Page 261 and 262: Infrared focal plane array imager C
Page 263 and 264: Qualitative IrFPA Charlie Chong/ Fi
Page 265: ■ Quantitative Thermal Imagers Qu
Page 269 and 270: Infrared focal plane array imager C
Page 271 and 272: Quantitative IR Image Charlie Chong
Page 273 and 274: 3.9 Thermal Imaging Display and Dia
Page 275 and 276: Changes in the corrections setting
Page 277 and 278: Image Recording, Storage and Recove
Page 279 and 280: Database and Documentation Records,
Page 281 and 282: 3.10 Photorecording Accessories for
Page 283 and 284: Chapter 3 Review Questions Q&A 1. b
Page 285 and 286: Q4. The performance parameters that
Page 287 and 288: Q10. The purpose of adding an infra
Page 289 and 290: Q16. Most infrared focal plane arra
Page 291 and 292: Q22. Filters, lenses and transmitti
Page 293 and 294: End Of Reading Charlie Chong/ Fion
Page 295 and 296: Good Luck Charlie Chong/ Fion Zhang
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