Sunday, December 08, 2013

Body Heat and an Infrared Camera

Made a new batch of videos, think I'm getting the hang of the camera more, and the tripod adapter finally got here. Here are the few related to body heat and probably the most interesting of the bunch. Note to self, turn up the maximum temperature next time so all exposed skin isn't bright white.

Reminder: the camera isn't set up well enough for any temperature readings to be considered accurate.
Playing Dress-up
Layering Clothes (in Grey)
No start from shirtless, but the t-shirt is thin enough that it doesn't really matter. Thin sweater is put on over the t-shirt, a winter-weight pea coat is thrown on top, and finally gloves are put on. The blob on the t-shirt is a sweat stain -- made this video after doing the exercise bike one.
Riding an Exercise Bike
This took much longer than I thought it would. Five minutes were spent on the bike, but a difference is noticeable in the video after the first few. The exercise bike's parts are encased in a black plastic shell. It looks like the internal parts become more visible over time. I think the temperature increase on the edges of the shell are points where two halves of the shell are connected/screwed together.

Instead of speeding up five minutes of video, snippets were taken at the beginning of every minute. It was also slowed down by 50%. Speeding everything up made the pedaling a bit disorienting. Max temperature was blocked out to avoid seeing the numbers constantly shifting -- feet moving in and out of the measurement area.
Hands on a stool
Body Heat Transfer from Hands
The most classic experiment with an IR camera: latent body heat from touching a surface. Nothing to it, but very interesting that it takes so long for the heat to go away. It was winter so my hands were freezing, hence the darker color.  The time it took for the heat to dissipate from the stool was annoying because I wanted to use it for something else.
Carpet Sliding
Carpet Sliding
Moving on to feet: a combination of body heat and friction on a carpet. Again, nothing really to it. Heat also takes a while to fade. More noticeable is the heat that appears to be bleeding through the socks -- no wonder my feet are still cold?

IR Vision, First Crack: Hot Cup, LCD TV, and a Laptop

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