Values in Reflectivity

joostm

Hi,

As part of my research into car coatings, I have conducted tests on a coated panel utilizing the HAP. During the testing process, I observed varying reflectivity scores for the same surface.  I'm investigating the cause of this discrepancy. Here's the link to my findings:


I would greatly appreciate your insights on this matter. Could you kindly provide any information on how this could have occurred?

Met vriendelijke groet / Kind regards

Joost

joostm

Also, when looking from the y-axis side view. When scanning a simple plate at 3 meters, I do not see consistent x values, so it's harder to do object detection. Is that normal? or is the device broken?


https://imgur.com/a/ol0S3Ov

https://imgur.com/a/xeEAjhg

Livox Support

Due to the curvature of the object's side, the inconsistent energy returned results in a slight deviation in reflectivity

joostm

Livox Support Posted at 2023-10-27 14:55
Due to the curvature of the object's side, the inconsistent energy returned results in a slight devi ...

I am struggling to understand how a flat plate can have a curve. Can you explain this to me in more detail? And especially the two scores min max scores

HAP: https://snipboard.io/HEM4Lq.jpg


When I use the Tele-15 to look at the same plate, I see a consistant range of scores. Why is there a difference with the HAP?

TELE-15: https://snipboard.io/Pzox7M.jpg

joostm

Hi,

Any ideas on this?

Livox Support

joostm Posted at 2023-11-6 19:14
I am struggling to understand how a flat plate can have a curve. Can you explain this to me in more ...

The reason for the curve generated by Livox HAP radar when measuring flat objects is mainly related to its FOV scanning method and measurement principle. The scanning method of Livox HAP radar is to scan the surface of an object at both the upper and lower angles through a laser beam, in order to obtain point cloud data.
When using HAP radar to measure flat objects, due to the smooth surface of the flat plate and the absence of obvious concave and convex features, the laser beam may cause intermittent or missing point clouds on the edge lines during the scanning process due to missing data from certain angles. This type of discontinuity and absence will exhibit a curved shape when forming a point cloud.
In contrast, the Tele-15 radar adopts a rotary scanning method, which allows the laser beam to cover more evenly and continuously change the scanning angle, making it more accurate for measuring flat objects. Therefore, when using the Tele-15 radar to measure the same plate, the point cloud and plate you see are consistent.