Heat Detection and Measurements
I have not been able to find much related to heat detection and realsense cameras with what I am looking to accomplish. Is there a maximum heat temperature that can be detected and still get accurate measurements from it? I was looking to see what was doable measuring an object but that object is around 600C. This object would be a cylinder with a hole down the middle to measure the diamter of the hole and the entire diameter of the cylinder.
If there is a way could the camera also be placed behind a clear panel to protect the camera from heat radiating from the cylinder or would this mess with the depth sensing in the camera?
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Hi Mrekuc Yes, you could place the camera behind a clear panel. This is demonstrated by a custom housing for a RealSense 400 Series camera used in an underwater application in the link below.
https://github.com/IntelRealSense/realsense-ros/issues/1723#issuecomment-805760519
A comment in that discussion that is directly beneath the one linked to above provides links to further information about selection of transparent cover materials.
Please bear in mind that although RealSense cameras can detect temperature in regard to their internal components, they are not thermal imaging cameras and so will not show a temperature map of the scene that they are observing.
RealSense 400 Series cameras can operate with an internal projector temperature up to 60 degrees C before a safety mechanism in the camera's firmware driver shuts off the laser if the projector temperature is detected to be 60 degrees C or greater for more than several seconds. The camera can continue to operate with the laser shut off, though depth image detail may be reduced.
There is a relationship between outer casing (skin) temperature and internal operating temperature. An Intel lab test found that the internal projector temperature should not reach 60 degrees if the outer skin did not exceed a temperature of 44 degrees C.
https://github.com/IntelRealSense/librealsense/issues/5209#issuecomment-563358823
You may find a pre-made industrial enclosure such as the example in the link below to be useful to your needs.
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MartyX Grover thank you for the info.
So temperature of the object shouldnt matter if it is extremely hot and glowing orange? You'd still be able to measure the object if there are details to detect such as the sides of the cylinder?
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In regard to the light and color generated by a glowing object, the depth image may benefit from this. The 400 Series cameras can make use of ambient light to analyze surfaces for depth detail, and a bright orange surface is likely to be more visible to the camera than a dark grey or black surface (as those color shades absorb light and make such surfaces more difficult for the camera to read).
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