Understanding Infrared Thermography Reading 7 Part 2 of 2.pdf

More documents

Recommendations

Info

Figure A-19 Instrument Speed of Response and Time Constant Charlie Chong/ Fion Zhang
A.4.4 Thermal Imaging Software In order to optimize the effectiveness of thermography measurement programs, the thermographer needs a basic understanding of thermal image processing techniques. The following is a broad discussion of thermal image processing and diagnostics. A detailed description of thermal imaging and diagnostic software currently available from manufacturers is provided in section 2. Thermal imaging software can be categorized into the following groupings: • Quantitative thermal measurements of targets • Detailed processing and image diagnostics • Image recording, storage, and recovery • Image comparison • Archiving and database* *Although data and image database development is not an exclusive characteristic of thermal imaging software, it should be considered an important part of the thermographer’s tool kit. Charlie Chong/ Fion Zhang
Page 1 and 2:
Infrared Thermal Testing Reading VI
Page 3 and 4:
6.1 Basic Elements An in-house prog
Page 5 and 6:
6.1.4 Responsibilities This section
Page 7 and 8:
IR Viewing Window - Opaque Polymer
Page 9 and 10:
6.1.8 Acceptance Criteria All surve
Page 11 and 12:
6.1.9 Reporting Criteria A rigid pr
Page 13 and 14:
6.1.10 Qualification of Personnel P
Page 15 and 16:
EPRI Licensed Material Basic Elemen
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
7. TRAINING AND CERTIFICATION This
Page 27 and 28:
Recommended training and certificat
Page 29 and 30:
■ Level II A Level II infrared th
Page 31 and 32:
The experience and education recomm
Page 33 and 34:
B. Spatial Resolution • the conce
Page 35 and 36:
D. Equipment Operation • Be able
Page 37 and 38:
The PdM basic examination is more s
Page 39 and 40:
Appendix-A The Science Of Thermogra
Page 41 and 42:
Erroneous conclusions can have an e
Page 43 and 44:
A.2.1 Heat and Temperature What is
Page 45 and 46:
To convert changes in temperature o
Page 47 and 48:
A.2.3 The Three Modes of Heat Trans
Page 49 and 50:
The Fourier Conduction Law: Q/A Q =
Page 51 and 52:
A.2.5 Convection Convective heat tr
Page 53 and 54:
Figure A-2 Convective Heat Flow Cha
Page 55 and 56:
A.2.6 Radiation Radiative heat tran
Page 57 and 58:
A.2.7 Radiation Exchange at the Tar
Page 59 and 60:
Charlie Chong/ Fion Zhang
Page 61 and 62:
Figure A-4 Radiative Heat Flow W ε
Page 63 and 64:
A.2.8 Specular and Diffuse Surfaces
Page 65 and 66:
Specular or Diffuse Surfaces Diffus
Page 67 and 68:
Specular and Diffuse Surfaces Confu
Page 69 and 70:
Specular reflection is the mirror-l
Page 71 and 72:
Reflections off Specular and Diffus
Page 73 and 74:
The thermogram of the outside surfa
Page 75 and 76:
Steady-state conduction Steady stat
Page 77 and 78:
A.3 The Basic Physics of Infrared R
Page 79 and 80:
A.3.1 Some Historical Background Th
Page 81 and 82:
A.3.3 The Target Surface The chart
Page 83 and 84:
Figure A-6 shows the distribution o
Page 85 and 86:
Charlie Chong/ Fion Zhang
Page 87 and 88:
Two physical laws define the radian
Page 89 and 90:
According to (2), the wavelength at
Page 91 and 92:
Figure A-7 Spectral Distribution of
Page 93 and 94:
Figure A-8 shows that the instrumen
Page 95 and 96:
If the emissivity of a gray body is
Page 97 and 98:
Under certain conditions, an error
Page 99 and 100:
EXAM score! Non-graybody (colored b
Page 101 and 102:
Figure A-10 illustrates the spectra
Page 103 and 104:
Figure A-10 Infrared Transmission o
Page 105 and 106:
Figure A-11 Infrared Spectral Trans
Page 107 and 108:
Figure A-11 shows transmission curv
Page 109 and 110:
EXAM score! Glass is opaque λ > 5
Page 111 and 112:
Figure A-12 Characteristics of IR T
Page 113 and 114:
The characteristics of the window m
Page 115 and 116:
IR Lenses - LWIR Len Charlie Chong/
Page 117 and 118:
IR Lenses - Fresnel Len Charlie Cho
Page 119 and 120:
Figure A-13 Components of an Infrar
Page 121 and 122:
Infrared optics are available in tw
Page 123 and 124:
All infrared detector-transducers e
Page 125 and 126:
Figure A-14 Typical Infrared Radiat
Page 127 and 128:
Germanium Len Charlie Chong/ Fion Z
Page 129 and 130:
Thermopile Detector Charlie Chong/
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
The IR Detectors Infrared detectors
Page 141 and 142:
Figure A-15 Spectral Sensitivity of
Page 143 and 144:
The Mercury- Cadmium-telluride (Hgc
Page 145 and 146:
The Mercury- Cadmium-Telluride (HgC
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Point-sensing instruments for measu
Page 153 and 154:
A.3.6.1 Line Scanning The purpose o
Page 155 and 156:
A.3.6.2 Two-Dimensional Scanning Th
Page 157 and 158:
Opto-mechanical Scanner A typical c
Page 159 and 160:
Electronic scanning Electronic scan
Page 161 and 162:
Figure A-18 Schematic of a Typical
Page 163 and 164:
Applications for infrared FPAs incl
Page 165 and 166: Staring Charlie Chong/ Fion Zhang
Page 167 and 168: A.4.1 Point-Sensing Instruments For
Page 169 and 170: Temperature sensitivity is also cal
Page 171 and 172: EXAM score! thermal resolution (≠
Page 173 and 174: NETD - Noise Equivalent Temperature
Page 175 and 176: Figure A-19 Instrument Speed of Res
Page 177 and 178: Figure A-20 Fields of View of Infra
Page 179 and 180: Figure A-20 Fields of View of Infra
Page 181 and 182: The output requirements are totally
Page 183 and 184: Spectrally selective instruments em
Page 185 and 186: Figure A-21 Spectral Filtering for
Page 187 and 188: Figure A-22 shows a similar solutio
Page 189 and 190: A.4.2 Scanners and Imagers.Qualitat
Page 191 and 192: • Total field of view (TFOV): the
Page 193 and 194: Despite some manufacturers’ claim
Page 195 and 196: A.4.3.1 Temperature Sensitivity, Mi
Page 197 and 198: Figure A-23 Test Setup for MRTD Mea
Page 199 and 200: A.4.3.2 Spot Size (FOV) , Instantan
Page 201 and 202: ■ A standard 4 bar (slit) resolut
Page 203 and 204: Both MRTD and MTF are functions of
Page 205 and 206: Charlie Chong/ Fion Zhang
Page 207 and 208: IFOVmeas: The slit width at which t
Page 211 and 212: FPA Charlie Chong/ Fion Zhang http:
Page 213 and 214: FPA Charlie Chong/ Fion Zhang
Page 215: A.4.3.3 Speed of Response and Frame
Page 219 and 220: The newest field-portable instrumen
Page 221 and 222: Appendix B Measuring Emissivity, Re
Page 223 and 224: Figure B-1 Target Radiosity Charlie
Page 225 and 226: The reference emitter technique wor
Page 227 and 228: 1. Apply the reference emitter (E)
Page 229 and 230: B.2.2 Reflective Emissivity Techniq
Page 231 and 232: Figure B-3 Using the Reflective Emi
Page 233 and 234: Figure B-4 Using the Transmittance
Page 235 and 236: Appendix C Quick Reference Charts A
Page 237 and 238: MTF Determination Using An Ir Image
Page 239 and 240: Measuring And Setting Effective Emi
Page 241 and 242: Classification Of Faults (Guideline
Page 245 and 246: Reading: Four Emissivity: Understan
Page 247 and 248: Figure 1 shows a typical three-phas
Page 249 and 250: Figure IR1: Corresponding infrared
Page 251 and 252: Thermal radiation and properties of
Page 253 and 254: The thermal nature of materials. Ma
Page 255 and 256: So in plain English, when the therm
Page 257 and 258: Figure 2: Stainless steel block. (a
Page 259 and 260: Observed with our thermal imager (w
Page 261 and 262: Can you see my eye glasses in the i
Page 263 and 264: How can the thermal imager’s read
Page 265 and 266: When we remove the block from the o
Page 267 and 268:
In this experiment we see that the
Page 269 and 270:
Charlie Chong/ Fion Zhang http://ww
Page 271 and 272:
Using a narrow band filter to measu
Page 273 and 274:
Emissivity, the variable’s variab
Page 275 and 276:
Emissivity and electrical equipment
Page 277 and 278:
In manufacturing processes, steel o
Page 279 and 280:
In this case, we have another power
Page 281 and 282:
Figure IR1: Corresponding infrared
Page 283 and 284:
Figure 7: Measuring the loads on a
Page 285 and 286:
Summary Predictive maintenance PDM
Page 287 and 288:
It is much like most endeavors in l
Page 289 and 290:
Good Luck Charlie Chong/ Fion Zhang
Page 291:
Charlie https://www.yumpu.com/en/br
show all

Understanding Infrared Thermography Reading 7 Part 2 of 2.pdf

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?