Author Topic: Autonomous vehicles.  (Read 13760 times)

richardfrost

  • Approved Member
  • *
  • Posts: 443
  • Country: gb
  • My Honda: Black 2005 1.4 SE
Re: Autonomous vehicles.
« Reply #150 on: July 28, 2019, 04:44:07 PM »
Parking sensors are about as basic a sensor as you can get. Radar and Lidar a bit more sophisticated.
Big bumper trucks in the mines seem to manage in dirty conditions.
Indeed. A fly would be invisible to Radar.

Jocko

  • Topic Starter
  • Approved Member
  • *
  • Posts: 4353
  • Country: scotland
  • Fuel economy:
  • My Honda: 2006 GD5 Jazz 1.2 i-DSi S in Vivid Blue Pearl
Re: Autonomous vehicles.
« Reply #151 on: July 28, 2019, 05:44:24 PM »
Yes, because it is not designed to look for flies.

ColinB

  • Approved Member
  • *
  • Posts: 431
  • Country: gb
  • My Honda: 2015 Jazz 1.3 SE manual in Milano Red
Re: Autonomous vehicles.
« Reply #152 on: July 28, 2019, 10:38:58 PM »

zzaj

  • Approved Member
  • *
  • Posts: 523
  • Country: gb
  • My Honda: 2014 1.4 EX CVT Orchid White

Jocko

  • Topic Starter
  • Approved Member
  • *
  • Posts: 4353
  • Country: scotland
  • Fuel economy:
  • My Honda: 2006 GD5 Jazz 1.2 i-DSi S in Vivid Blue Pearl
Re: Autonomous vehicles.
« Reply #154 on: July 29, 2019, 08:33:46 AM »
And raindrops are visible on radar. I remember sailing up the Red Sea in torrential rain. The radar showed the rain surrounding our ship for several miles, then dry beyond that. The desert either side probably hadn't had rain for 100 years!
After leaving the Merchant Navy I went on to become a Radio Radar mechanic, with the now defunct Ferranti.

richardfrost

  • Approved Member
  • *
  • Posts: 443
  • Country: gb
  • My Honda: Black 2005 1.4 SE
Re: Autonomous vehicles.
« Reply #155 on: July 29, 2019, 02:26:27 PM »
Well, yes, but I meant a dead fly spattered on the radar  8).

I worked for Marconi Radar in Leicester for a while, right next door to the Ferranti factory. Back then, a job was a job, not a pastime.

The Leicester site used to prepare complete radar installations ready to be just lowered on to the ship. So they left the factory ready painted battleship grey and with gold plated electrical contacts. Well, can you imagine the number of battleship grey cars there was driving around Leicester, or gold plated items. Need a kettle shot blasting? No problem Sir, just take it down the workshop.

Jocko

  • Topic Starter
  • Approved Member
  • *
  • Posts: 4353
  • Country: scotland
  • Fuel economy:
  • My Honda: 2006 GD5 Jazz 1.2 i-DSi S in Vivid Blue Pearl
Re: Autonomous vehicles.
« Reply #156 on: July 29, 2019, 02:39:38 PM »
Well, yes, but I meant a dead fly spattered on the radar
It would if it was big enough to cover as much of the receiving array as the one on the parking sensor!  ;D
I started with Marconi Marine as a ship's Radio Officer, working on Marconi radar systems as well as my radio duties.

Jocko

  • Topic Starter
  • Approved Member
  • *
  • Posts: 4353
  • Country: scotland
  • Fuel economy:
  • My Honda: 2006 GD5 Jazz 1.2 i-DSi S in Vivid Blue Pearl
Re: Autonomous vehicles.
« Reply #157 on: September 07, 2019, 12:54:40 PM »
I downloaded the NTSB report on the Tesla that collided with the stationary fire truck.

https://www.ntsb.gov/investigations/AccidentReports/Reports/HAB1907.pdf

It makes for interesting reading.
The guy bought the car, and though it came with a comprehensive manual, he didn't bother to read it. On the morning of the collision he was not holding the wheel and the car kept warning him, he was eating a bagel and drinking coffee while possibly "changing the radio" (his words). He had set the cruise control for 80 mph, though he was in a 65 mph limit.
He had been crawling along, in the HOV lane, behind a slow moving SUV or "truck". When it moved into the next lane to pass the fire truck (and accident) his car started to accelerate towards the 80 mph set speed. He still never thought to look up. Luckily it was only doing 31 mph when it struck the truck, but he definitely sounds like a nominee for "The Darwin Awards".


richardfrost

  • Approved Member
  • *
  • Posts: 443
  • Country: gb
  • My Honda: Black 2005 1.4 SE
Re: Autonomous vehicles.
« Reply #158 on: September 10, 2019, 10:33:46 AM »
I have driven the 405. That is the scariest road ever. And I have driven some scary roads. No way would I trust any kind of automation on that thing. There's a central 'high speed' lane you can get in and it has kerbs between it and the rest of the highway, with only occasional gaps to filter out. You'd better filter out early because it is so easy to miss your junction. Nobody wants to let you filter on the 405.

Jocko

  • Topic Starter
  • Approved Member
  • *
  • Posts: 4353
  • Country: scotland
  • Fuel economy:
  • My Honda: 2006 GD5 Jazz 1.2 i-DSi S in Vivid Blue Pearl
Re: Autonomous vehicles.
« Reply #159 on: September 10, 2019, 10:45:11 AM »
That is the HOV lane the Tesla was in. Electric vehicles are allowed in the high-occupancy vehicle lane, even when only the driver is in the vehicle. Probably just as well in this case!

richardfrost

  • Approved Member
  • *
  • Posts: 443
  • Country: gb
  • My Honda: Black 2005 1.4 SE
Re: Autonomous vehicles.
« Reply #160 on: September 10, 2019, 11:42:13 AM »
Yes you're right, high occupancy, not high speed. There's no real chance of high speed anyway in downtown LA. If I ever go back there, I will not be driving!

Tags:
 

anything
Back to top