Research Directory of the Brandenburg University of Applied Sciences
Research Directory of the Brandenburg University of Applied Sciences
Research Directory of the Brandenburg University of Applied Sciences
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Fachhochschule <strong>Brandenburg</strong><br />
<strong>Brandenburg</strong> <strong>University</strong> <strong>of</strong> <strong>Applied</strong> <strong>Sciences</strong><br />
Fig. 3.14: Temperature measurement at a free falling<br />
ball (heated up to 70°C) with <strong>the</strong> LW bolometer<br />
camera SC2000. Thermogram <strong>of</strong> <strong>the</strong> falling ball at<br />
93 cm falling height (top, left). Pr<strong>of</strong>ile <strong>of</strong> <strong>the</strong> temperature<br />
distribution along <strong>the</strong> line in <strong>the</strong> image (top,<br />
right). Ball size has correct scaling. Time dependence<br />
<strong>of</strong> <strong>the</strong> temperature measured along <strong>the</strong> falling<br />
line with a time scale calculated from <strong>the</strong> falling<br />
distance s using s = ½ gt 2 (bottom, right).<br />
50 Hz an image is recorded every 20 ms but <strong>the</strong> detector<br />
responds more slowly to temperature changes.<br />
Therefore <strong>the</strong> image <strong>of</strong> <strong>the</strong> falling ball is not only blur-<br />
Fig. 3.15: Signal rise and decay at <strong>the</strong> bolometer for different speed<br />
v <strong>of</strong> <strong>the</strong> ball (ball diameter d)- fast ball d/v
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