Course in Non-Destructive Testing of Wood

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1 Course in Non Destructive Testing of Wood 01 Introducción Pág. 1 Course in Non-Destructive Testing of Wood INTRODUCTION ETS Ingenieros de Montes ETS Arquitectura UPM, Madrid Literature 1

2 Course in Non Destructive Testing of Wood 01 Introducción Pág. 2 Classification of wood NDT techniques based on the physical background Mechanical Acoustic Electromagnetic Nuclear Mechanical Proof loading Static bending Drill resistance Pin penetration 2

3 Course in Non Destructive Testing of Wood 01 Introducción Pág. 3 METRIGUARD bending proof loader METRIGUARD tensile proof loader 3

4 Course in Non Destructive Testing of Wood 01 Introducción Pág. 4 METRIGUARD HCLT lumber grader and grade stamp Lumber grading, static MOE determination HCLT tool by Metriguard, USA 4

5 Course in Non Destructive Testing of Wood 01 Introducción Pág. 5 HCLT tool by Metriguard, USA Resistograph drill 5

6 Course in Non Destructive Testing of Wood 01 Introducción Pág. 6 Simple Drill testing Pylodin, pin penetration tool 6

7 Course in Non Destructive Testing of Wood 01 Introducción Pág. 7 Acoustic methods Stress wave Ultrasonic Acoustic emission Vibration (longitudinal, transversal, torsion) Stress wave timers 1 7

8 Course in Non Destructive Testing of Wood 01 Introducción Pág. 8 Stress wave timers 2 Acoustic tomography Fakopp 2D PICUS SONIC TOMOGRAPH Image source is 8

9 Course in Non Destructive Testing of Wood 01 Introducción Pág. 9 ARBOTOM Image source: Ultrasonic timer, Sylvatest 9

10 Course in Non Destructive Testing of Wood 01 Introducción Pág. 10 GRECON on-line particle board control, based on attenuation of ultrasonic waves Acoustic emission event 10

11 Course in Non Destructive Testing of Wood 01 Introducción Pág. 11 Drying control by acoustic emission Longitudinal vibration, Lumber grader Dynalyse, Dynagrader Portable Lumber Grader Microtec, ViSCAN 11

12 Course in Non Destructive Testing of Wood 01 Introducción Pág. 12 Electromagnetic Moisture meters Microwaves Thermography Moisture meter 12

13 Course in Non Destructive Testing of Wood 01 Introducción Pág. 13 METRIGUARD veneer grader based on ultrasonic speed and microwave attenuation Quality control at LVL palnt Thermography 13

14 Course in Non Destructive Testing of Wood 01 Introducción Pág by 10 by 10 cm spruce cube conditioned at -12 C o Heating up from -12C o to 22 C o Thermal images after 2 and 40 minutes heating time 14

15 Course in Non Destructive Testing of Wood 01 Introducción Pág. 15 Spruce knot with nail 10 cm Sugi (Criptonomeria Japonica) 15

16 Course in Non Destructive Testing of Wood 01 Introducción Pág. 16 Traditional Japanese wall section Outdoor test samples 16

17 Course in Non Destructive Testing of Wood 01 Introducción Pág. 17 Thermographic image of the outdoor test, temperature is rising. He-Ne laser interaction with fibers Spot on paper Transmission through 2 mm polpar veneer 17

18 Course in Non Destructive Testing of Wood 01 Introducción Pág. 18 Nuclear techniques X-ray Gamma-ray, CT Magnetic resonance CT image of a fir log 18

19 Course in Non Destructive Testing of Wood 01 Introducción Pág. 19 Gamma densitometry, scattering Gamma densitometry, backscattering 0,9 0,8 0,7 0,6 0,5 0,4 0, Inte ns ity [a rb itra ry unit] 19

20 Course in Non Destructive Testing of Wood 01 Introducción Pág. 20 Gamma densitometry, through transmission Wood sample located between the source (Am-241) and sensor Measured parameter: Intensity: I (counts/sec) Equation: - ρ: density ρµ d I = I e - d: thickness 0 - µ: absorbtion coeff. 20

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