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Smart Cruise Control not detecting stopped cars - Part 2

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Uchiha madara

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Dear All


you know all of you that i have aporblem in my cruise control that its not detecting fully stopped cars from long distance
as per what i wrote here

http://genesisowners.com/hyundai-genesis-forum/showthread.php?t=18779

so i went to the dealership and i asked him to reset the system of the SCC to factory default and now its working fine

so who ever have it he should just go to the dealership and do what i have done



Thank you
 
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Yes, thank you for the update!
 
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I do not think this is correct at all, the automatic cruise never detected stationary cars, only AEB would. I experienced this first hand and this is also a documented issue with Tesla autopilot.
 
greekgeek said:
I do not think this is correct at all, the automatic cruise never detected stationary cars, only AEB would. I experienced this first hand and this is also a documented issue with Tesla autopilot.
Click to expand...

Do you have any suggestions on how to resolve the discrepancy regarding SCC operation re: stopped vehicles?
 
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I was thinking more along the lines of a methodology for a SAFE road test that would produce repeatable, verifiable, and definitive results. I'm thinking two vehicles at maximum spacing at slow speed with the lead vehicle then slowing (more or less quickly) to a stop, providing a window for SCC to either "see" the stopped vehicle and react, or miss it entirely, requiring the driver intervention.

Knowing the capabilities of the system, as you do, could such a test methodology be developed and used? Would its results be meet the objectives of repeatability, verifiability, and definitiveness?

Otherwise, you'll be arguing pg. 78 against someone else impressions of what happened a month ago versus a third person's misunderstanding of SCC in general. Of course, an intrepid Hyundai salesperson could always be consulted for their opinion...
 
According to the Manual the SCC can't recognize a stopped vehicle.
 

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danygenesis said:
According to the Manual the SCC can't recognize a stopped vehicle.
Click to expand...

Can it recognize a car slowing from 30mph to 3mph? What about one slowing from 3mph to .3mph? What about one that slows from .3mph to 0mph? If it can't do all that, what part can't it do?

The system can track to a complete stop, right? Doesn't that mean it can detect a stopped vehicle? Or is it just guessing that the stopped vehicle is there? And what does it do if you tell it to resume while the car is still stopped just ahead of you? Does it go or does it no?
 
williakz said:
Can it recognize a car slowing from 30mph to 3mph? What about one slowing from 3mph to .3mph? What about one that slows from .3mph to 0mph? If it can't do all that, what part can't it do?

The system can track to a complete stop, right? Doesn't that mean it can detect a stopped vehicle? Or is it just guessing that the stopped vehicle is there? And what does it do if you tell it to resume while the car is still stopped just ahead of you? Does it go or does it no?
Click to expand...
When it is locked on it can adjust to any speed and also complete stop, auto restart motion if car ahead moves again in 3 secs. My guess is the system is not capable to discriminate between stationary objects accurately so ignores them all. Kind d of makes sense car would stop way too often,, no need to stop for a Orange barrel on curve ahead or a building, mailbox etc in the field of vision.

Now that said the AEB system will detect stationary objects, warn, and apply the breaks but I have zero confidence it would avoid collision at hi speed, probably lessen speed at impact.

No SCC tests needed, it is what it is, incapable of recognizing stopped objects.
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Uchiha madara said:
Guys its working with me fine its detecting fully stopped cars now
Click to expand...

Video or it didn't happen.

Intelligent cruise control uses radar to detect a number of things. First, part of the signal emitted is used to detect your vehicle's speed. It uses road signs, buildings, even the road itself to do this. Note - these are all STOPPED objects. Other parts of the signal are used to detect other moving objects (read: vehicles) that are moving faster than you, slower than you, and the same speed as you. If you come around the corner and there's a stopped car at the red light ahead, the cruise control system will NOT stop the car for you. The auto braking probably will, as it detects non-moving objects that you are on a collision course with (probably). On the other hand, if that same car in front of you is slowing down for the red light, the cruise control will detect that as a moving vehicle and try and match it's speed, down to a complete stop in most cases. I've experimented with this extensively and while I'm not sure what the threshold speed is, it seems that 5-10 mph is a good guess. Otherwise the system sees this as a "stopped" object and ignores it.

I suspect that as systems such as ours get more and more advanced, the rules will change.

Just my .02 from a former police RADAR (RAdio Detection And Ranging) instructor.

Tony
 
Tony,


INCORRECT INFO: I was thinking of laser-based LiDAR, not microwave based radar which does indeed directly measure speed via the Doppler effect.

A point of order (or physics, actually). Radar measures DISTANCE, not speed. From radar's perspective, EVERYTHING is stopped. The car's radar microwaves travel to the object and reflect back from it to the car's receiver at the speed of light (186,000 miles/second).

That car traveling exactly at your speed 4 car lengths ahead of you? STOPPED
That red Camaro coming over the hill at 90 mph when you "take his picture"? STOPPED
The road flashing under the car at 70 mph? STOPPED

Radar only "detects" speed by taking multiple distance readings and dividing the difference by the time elapsed between the two readings. In other words, for radar, speed is a CALCULATED quantity whereas distance is a MEASURED quantity.
 
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williakz said:
Tony,

A point of order (or physics, actually). Radar measures DISTANCE, not speed. From radar's perspective, EVERYTHING is stopped. The car's radar microwaves travel to the object and reflect back from it to the car's receiver at the speed of light (186,000 miles/second).

That car traveling exactly at your speed 4 car lengths ahead of you? STOPPED
That red Camaro coming over the hill at 90 mph when you "take his picture"? STOPPED
The road flashing under the car at 70 mph? STOPPED

Radar only "detects" speed by taking multiple distance readings and dividing the difference by the time elapsed between the two readings. In other words, for radar, speed is a CALCULATED quantity whereas distance is a MEASURED quantity.
Click to expand...

I'm not exactly sure what your point is. Nothing you say conflicts with what I said. I tailored my post for the readers on this forum who are talking about the RADAR system in our cars, not a physics lesson. If you want to split hairs, I'll point out that the correct speed of light of 186,282 miles per second. I'll also point out that RADAR detects a difference in transmitted vs. returned frequencies (the Doppler shift) and uses math to display a speed. And as I said before, the RADAR systems in our cars determines a number of things.

Tony
 
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TbonePdx said:
I'm not exactly sure what your point is. Nothing you say conflicts with what I said. I tailored my post for the readers on this forum who are talking about the RADAR system in our cars, not a physics lesson. If you want to split hairs, I'll point out that the correct speed of light of 186,282 miles per second. I'll also point out that RADAR detects a difference in transmitted vs. returned frequencies (the Doppler shift) and uses math to display a speed. And as I said before, the RADAR systems in our cars determines a number of things.

Tony
Click to expand...

You are correct, Tony. I was thinking of LIDAR, not radar. I have put a note in my original post.
 
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