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Quantitative building thermography
04-03-2019, 11:56 AM (This post was last modified: 04-03-2019 11:59 AM by alikatal.)
Post: #10
RE: Quantitative building thermography
Yes, I agree with you. As I said, other researchers did quantitative thermography only for one building and from a close distance so they could measure the correct temperature because they estimated the emissivity and reflective temperature using black tape and a piece of foil on the wall surface. They also mentioned the angle us important in thermography but in my case, I cannot meet all these conditions for an accurate measurement. I know that it's almost impossible to do accurate quantitative thermography using a drone for a group of buildings but my supervisor does not believe me and says that there should be a solution for it.

(04-03-2019 05:04 AM)Bobberry Wrote:  What you are trying to do is extremely difficult even with training. It is not just a matter of using standardised values for emissiivity and reflected temp. You need to understand how and why these give you errors, this takes quite a bit of training and experience.

What you are experiencing is that thermography is not as easy as you thought, and this if anything is highlighting the need for training.

My advice is not to try to measure U values from a drone based camera at a distance of 60m without any training. Stick to qualitative thermography, if you need to measure accurate U values, then you will need additional instrumentation, and strong knowledge of building physics, it will not be possible to do it accurately just with a drone.

attached is an image of one of the buildings.

(03-25-2019 09:03 AM)jvoitl Wrote:  Do you have a digital image of a section of one of your buildings so we can see what you're dealing with?

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RE: Quantitative building thermography - alikatal - 04-03-2019 11:56 AM

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