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  • tesla is very adamant on their statement of not  using lidar for their vehicles to accomplish  

  • full self driving why is everyone else using  lidar is lidar good is it bad let's discuss  

  • that in this video different companies are taking  different approaches to full self driving no one  

  • has actually reached level 5 full self driving  yet so really it's just anyone's game at this  

  • point but right now as it stands tesla seems to be  the one in the lead if you haven't seen any of the  

  • videos that owners are actually posting on youtube  twitter or other social media platforms about the  

  • fsd beta the rewrite that elon said would bequantum leap then you are greatly missing out  

  • those videos that owners are posting show how well  the car actually handles most of the situations  

  • now you can argue and say well waymo already has  their full self-driving system active in a city in  

  • arizona and to that i would say yes it's working  but there are big issues with lidar now what is  

  • lighter in the first place lidar stands for light  detection and ranging and what does that basically  

  • mean well there's a spinny thingy i'm just gonna  call it a spinny thingy because that's that's  

  • literally what it is and in that spinny thingy it  shoots out lasers or light beams and what it does  

  • is it waits for the light beam to return back and  calculate how far that item is or object is from  

  • its location and this can be very useful this is  basically what radar does except using light waves  

  • visible light spectrum and this is not necessarily  a bad thing the iphone 12 hasn't they're using it  

  • for a completely different purpose rather than  full self driving and obviously they're using  

  • something that is much less precise whereas the  lidar used for cars is millimeter precision it  

  • can measure something up to a certain distance  with millimeter accuracy the iphone does not do  

  • that i don't even know if it does centimeter  precision but that is highly possible and i  

  • think reports have also came showing that the  iphone only does it up to about 16 feet so not  

  • that far that'd be like a car driving about three  to four miles an hour and i've seen this argument  

  • made well why can't cars use lidar if the iphone  has it because of this reason i'm pretty sure you  

  • don't want to be in a car that only goes three  miles an hour because it can only see 16 feet  

  • in front of it so why is tesla not using lidar  so tesla is very engineering based they want to  

  • simplify things as much as possible and everyone  working there has a sort of engineering mindset  

  • thinking from first principles and there are  some issues with lidar that present themselves  

  • before you even get started number one is cost  and here's what i think about cost cost can drop  

  • dramatically over time before it costed about  seventy eighty thousand dollars to just buy the  

  • equipment for lidar let alone actually installing  it on a vehicle and that is very expensive that's  

  • just the entire cost of the car itself but now  cost of lighter is dropping i think it's about  

  • 25 000 and so cost is something we can get over  if it proves to be a valuable asset now the second  

  • reason why tesla doesn't use lighter is because  it's quite unreliable i mean think about this  

  • you have physical cameras that don't move don't  do anything like the ones you have in your phone  

  • pretty much and what they're doing is they're just  there like they just work you could take a 10 year  

  • old phone and open up the camera and obviously  maybe the image quality is not that good it's  

  • all for processing but as long as the phone works  the camera should also work as long as everything  

  • works properly and that's exactly the benefit  using cameras you have cameras that can detect  

  • everything and obviously lidar isn't a replacement  for cameras it's just an add-on but cameras can do  

  • the same thing that lidar can and lidar isspinny thing it's literally something that is  

  • spinning outside of the vehicle which means it's  more prone to damage so because of that reason  

  • lidar is not really practical because first of  all if it breaks it's quite expensive to replace  

  • secondly even if it does not break it's just  something that is waiting to be broken and that's  

  • quite useless and also ruins the design of the car  i mean you look at any tesla out today especially  

  • any model 3 or model y which all have the sensor  suite to make full self driving viable on those  

  • vehicles you look at those cars and they're pretty  much like every other car on the road well maybe  

  • they look nicer than every other car on the road  that's subjective but they don't have some next  

  • external factor that distinguishes them from other  vehicles on the road necessarily for example if  

  • you look at waymo or google self-driving  cars first of all google self-driving car  

  • it looks like an orange it looks like a ball  with something on top of it like it's weird what  

  • then you take waymo for example waymo useschrysler pacifica which is a pretty nice minivan  

  • if i have to say myself but you look at the sensor  suite and you can tell that car is special it has  

  • some self-driving equipment and whatnot whereas  tesla does not do any of that it's all just built  

  • into the vehicle and with lidar you cannot get  that so it's just something to think about now  

  • the third reason why tesla doesn't use lidar is  because it's redundant there's no need to use  

  • lidar because lidar does not work in most of the  situations where you want something to actually  

  • work and help the cameras lidar does not work  in fog it does not work in snow it does not work  

  • in rain does not work inhale it basically doesn't  work in most of the natural climates we have here  

  • on earth and because of that limitation for lidar  what you need is a beast of a vision system and  

  • that's what elon has been referring to lidar is  useless in that sense because during those times  

  • lidar won't be used and if you try to use it  it can't see anything it's like driving blind  

  • essentially even in a light rainstorm and so what  you need with lidar is a really good vision system  

  • which you need even though you're not using lidar  so really lidar just becomes a secondary option  

  • for something that is less relevant and actually  even less useful because it doesn't even work  

  • most of the times when you need some sort of help  now radar is different radar uses radio waves to  

  • determine the distance between the vehicle and  front and what radio waves do is they can see  

  • through rain fog hail snow just anything pretty  clearly if there's any rainfall it can see other  

  • cars pretty clearly and so that's why they use  radar for adaptive cruise control to keep you a  

  • safe distance away from the car in front and radar  is actually useful it's not that expensive it  

  • doesn't break easily there's no real moving part  and it actually aids the cameras it can actually  

  • detect distance with pretty good accuracy and see  through most of the natural climate we have here  

  • on earth so radar makes total sense lidar not so  much even though it's trying to compensate for  

  • radar if that makes any sense so why is every  other company using lidar well for one no one has  

  • actually reached full self driving yet so we don't  really know what's the right method it could be  

  • that tesla's method is completely wrong and they  just have to start from scratch and add lidar and  

  • whatever you know mission failed full self-driving  capabilities not coming to any of the cars that  

  • elon promised it would tesla would probably refund  their money at that point but i see that as a  

  • highly unlikely scenario i mean think about it  humans drive with two cameras their eyes and  

  • this is what elon argues all the time we have  two cameras on a pretty bad gimbal system our  

  • neck or head and we drive pretty badly but pretty  well for how we should be driving i mean with two  

  • cameras only looking straight with a little bit  of peripheral vision we should be driving much  

  • worse than we are right now so in that sense you  can say that cameras do a really good job and now  

  • tesla has the 360 degree cameras looking all  around the car with a computer that reacts  

  • in milliseconds not at the second time scale your  brain reacts at the second time scale if something  

  • happens it takes a fraction of a second for your  brain to compute and perform that task whereas for  

  • a computer it takes milliseconds it's a thousand  times quicker than you are and here's going to be  

  • my final point about lidar what everyone else is  doing other than tesla and comma ai is using lidar  

  • and mapping out the roads so what you do with  mapping is you have a vehicle or many vehicles  

  • that actually map out the road beforehand measure  exactly to millimeter accuracy where everything is  

  • and then the car would drive kind of like in  a video game but real life isn't a video game  

  • random things happen all the time for example  if there is construction on a mapped road  

  • the car is likely to have a much harder time to  comprehend how to navigate that situation versus  

  • a car that relies on vision and that works like  your brain when you arrive at a situation when  

  • there's construction or pylons or really anything  you know how to navigate that situation maybe not  

  • well because the humans you know we create traffic  jams but we know how to navigate those situations  

  • we're not just completely stuck we don't just turn  off our cars we're like oh we're done that's it  

  • we just have to wait for this construction to go  we're not like that tesla's system will be exactly  

  • the same it'll work more like a human brain than  a computer and this can be seen by all those fst  

  • beta videos the owners are putting out it behaves  a lot like a human it waits it navigates roads and  

  • navigates around other cars other objects around  people much more like a human and it drives much  

  • more like a human rather than what you would  assume a computer would drive like so when the  

  • waymo vehicle approaches a construction zone in  its path it has to essentially rely on vision  

  • and just rely on everything that whoever coded the  system taught it and what to do in that situation  

  • whereas tesla system it works like that it's  literally intended for it doesn't even have to  

  • think about it it's almost like it doesn't even  care that there is construction its main purpose  

  • is to navigate the system and the tesla vehicle  is just gonna go through it like it's nothing  

  • whereas waymo might get stuck and this is exactly  why waymo looks to be ahead when it actually isn't  

  • right now it's only working in a city in arizona  on certain streets try taking that exact system  

  • just take it outside of the city where their  roads aren't mapped and it would essentially fail  

  • not saying would necessarily fail entirely  but it won't be able to do as good of a job  

  • or even close to as good of a job or remain as  safe as it was in that playground as i call it  

  • what you have to do is take the car out of the  playground once the car is out of the playground  

  • you can determine if the car can navigate  certain situations that humans can navigate  

  • without even thinking about you have to designfull self-driving car like a human and lidar just  

  • sort of restricts you like that we don't have  any sort of system that determines distance we  

  • just have two eyeballs and we just know okay this  is how far we are from the other cars and so far  

  • we should remain and we do a relatively good job  sure some people get killed on accidents but based  

  • on what computers have taught us there should be  a lot more accidents so we're a lot more safer  

  • than we were intended to be with driving so in the  end it looks like tesla is actually going to be  

  • first to achieve complete full self driving  just because of what they're doing and it also  

  • seems like lidar may not be the right approach  i think england was right the entire time that  

  • lidar is just not the right approach but we  have yet to see real full self driving with no  

  • human supervision and whenever that happens  times can change maybe waymo will decide to drop  

  • lidar entirely tell me what your thoughts  on this in the comments down below and i'll  

  • talk to you there thank you for watching hope you  enjoyed this one and i'll talk to you later peace

  • you

tesla is very adamant on their statement of not  using lidar for their vehicles to accomplish  

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A2 初級 美國腔

为什么TESLA不使用LiDAR?(Why TESLA Isn’t Using LiDAR?)

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    joey joey 發佈於 2021 年 05 月 24 日
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