Residential Structural Analysis
Could the L515 be used to scan the roof structure of residential homes from within the attic? On the product page in the FAQs, it lists the max operating temperature as 30 degrees Celsius. Attics in the southern United States can get hot as about 50 degrees Celsius. Are those sorts of temperatures harmful to the device, or will they effect the accuracy of the scan?
Additionally, if anyone has any other thoughts on the feasibility of using the L515 for this purpose, I'd love to hear them. I'm particularly interested in accuracy and edge fidelity in this environment. We would also be using this to create an interior map of the home, including all interior walls and load bearing beams. Any and all thoughts are appreciated.
Thanks!
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I considered your use-case carefully. I believe that in this case, the L515 may be unsuitable. Homes tend to have variable lighting and shadow, instead of a consistent light source. They also have windows, and the L515 can experience interference from IR sources such as sunlight. In your application, a 400 Series stereo depth camera is likely to be the more suitable choice. These contain a Vision Processor D4 chip to automatically adjust the camera to changing environmental conditions and can cope excellently with sunlight.
Of the models available in the 400 Series range, the D435i may meet your needs. It has a wider field of view than the D415 (making it suitable for capturing wide shots of interior views) and a minimum sensing distance of 0.1 meters (compared to 0.4 meters on L515), enabling it to get closer to surfaces. It contains an IMU component, in case you want to perform SLAM mobile mapping of rooms.
https://store.intelrealsense.com/buy-intel-realsense-depth-camera-d435i.html
In regard to temperature, the 400 Series can tolerate temperature well. The bottom of page 43 of the current edition of its data sheet document states that its depth sensing module can bear an official maximum case temperature of 50 degrees C whilst operating.
The 400 Series has an in-built laser safety mechanism that will halve the laser power if internal temperature exceeds 60 degrees C for several seconds and then shut the laser off if the temperature continues to be excessive.
Excessive temperature can have a risk of the imaging sensors inside the camera becoming miscalibrated (reducing depth quality and accuracy), though this can be corrected with a software tool.
The 400 Series data sheet document can be found at the link below:
https://dev.intelrealsense.com/docs/intel-realsense-d400-series-product-family-datasheet
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