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Ouster's new digital Lidar – 128 beams, ultra-wide view

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11–20 of 122 posts

Re: Ouster's new digital Lidar – 128 beams, ultra-wide view

#11
Anyone have a LIDAR (or similar) product suggestion?

I'm getting ready to start a hobby project that involves scanning the interior surfaces of a house. Ideally the accuracy would be at least 1/16" (1.5mm), including any scan-stitching required because the sensor had to be moved around.

I've seen a few promising products, but none stands out as a perfect match.

Re: Ouster's new digital Lidar – 128 beams, ultra-wide view

#12
post #4

I wonder how well this works if 20 such devices shine on the same object.

Lidars can interfere but somewhat less than other types of active sensors. First of all, the detector only needs to be on for a microsecond or two, and it's unlikely for two sensors to be scanning at the same microsecond. Second, laser spots are fairly small and unlikely to overlap. Finally, there are techniques to further get rid of crosstalk, such as coded random pulses with a matched filter.

Re: Ouster's new digital Lidar – 128 beams, ultra-wide view

#13
post #4

I wonder how well this works if 20 such devices shine on the same object.

That's sort of like asking how well cameras would work if 20 of them were looking at the same object. Lidar sensors can interfere with each other, and a certain industry-standard company is famous for having terrible problems with this issue, but there are engineering solutions to this problem. FMCW is a popular choice, and gives the benefit of providing instantaneous velocity readings. Of course, due to the Heisenbe…

When you get dozens of photographers shooting the same subject and all with their own flash, yes you can get interference that wrecks certain images. And the more photographers gather together the more of them will interfere. So indeed your comparison is apt and doesn't help me understand why it isn't a problem. The non-flash scenario is of course not applicable since lidar is actively lighting its subjects.

Re: Ouster's new digital Lidar – 128 beams, ultra-wide view

#14
post #4

I wonder how well this works if 20 such devices shine on the same object.

The duty cycles of lidars are generally low enough that interference is rare. The big problem in my experience is objects glinting in sunlight which isn't a problem if you're in in a warehouse but is for rooms with big windows or outside. In any event you always need to be filtering your inputs rather than taking every reading as a sure thing.

Re: Ouster's new digital Lidar – 128 beams, ultra-wide view

#16

Anyone have a LIDAR (or similar) product suggestion? I'm getting ready to start a hobby project that involves scanning the interior surfaces of a house. Ideally the accuracy would be at least 1/16" (1.5mm), including any scan-stitching required because the sensor had to be moved around. I've seen a few promising products, but none stands out as a perfect match.

If you just want the result of the scan (not clear if the hobby project is the scanning itself or something else) you should be able to contract it as a service, or just rent the scanner. This is common for architectural scan work.

Re: Ouster's new digital Lidar – 128 beams, ultra-wide view

#18
post #7

Earlier quoted context omitted.

> like asking how well cameras would work if 20 of them were looking at the same object. > Lidar sensors can interfere with each other Then it's not really like 20 cameras looking at the same object. Mostly due to the fact that cameras are passive observers and not really emitting much. And if they do, it's light and it won't really affect the others because they all benefit from it (within reason). I'm reasonably ce…

Fair enough, I didn't really expand my comment enough to make my point and was about to delete it but now that someone replied I'll just leave it as is since I don't want to write a small essay. A good lidar sensor won't have issues with interference.

Is it more or less a forgone conclusion that a good LiDAR sensor would not be affected by potentially hundreds of other similar or identical ones shining their beams across the same region?

Re: Ouster's new digital Lidar – 128 beams, ultra-wide view

#19
post #3

> The OS0 lidar sensor: an ultra-wide field of view sensor with 128 lines of resolution > The OS2 lidar sensor: a long-range sensor with up to 128 lines of resolution > Two new 32 channel sensors: both an OS0 and OS2 version > Price: Starts at $16,000 with volume discounts available I would LOVE to get my hands on this tech. Maybe in 5-10 years when the price comes down to commodity level for hackers to play around w…

While this is a ~80% discount on other 128 beam sensors, it's unfortunately still out of reach for the hacker community. We absolutely plan to get prices down to an affordable level for individuals in well under 5 years! Also, Ouster runs a sponsorship program that gives deeply discounted or free sensors to cool projects. If you have a cool idea, shoot me an email: derek.frome at ouster dot io

How can one apply for a “cool project”?

Re: Ouster's new digital Lidar – 128 beams, ultra-wide view

#20
post #18

Earlier quoted context omitted.

Fair enough, I didn't really expand my comment enough to make my point and was about to delete it but now that someone replied I'll just leave it as is since I don't want to write a small essay. A good lidar sensor won't have issues with interference.

Is it more or less a forgone conclusion that a good LiDAR sensor would not be affected by potentially hundreds of other similar or identical ones shining their beams across the same region?

For FMCW, there should be no interference at all for any number of sensors (there is more information in the link in my original comment). For pulsed lidar, it's an issue of how well you engineer it. I can confidently say a good sensor can regularly withstand dozens of sensors operating simultaneously in a small area because I've personally witnessed it. The devil is largely in the details of specifications and manufacturing quality (that latter one is a much bigger issue in reality), but there is no theoretical reason you couldn't make it work with hundreds of sensors simultaneously. And like I said, I know current off-the-shelf parts that will work with dozens of sensors simultaneously.

Maybe I can add a little color to my original comment this way: most lidar sensors today, including some very expensive ones from supposedly reputable vendors, are not very good. In my experience, it is more often a manufacturing problem than a design problem (this varies more by company than it does by technology).

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