F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > Regional Forums > UK > Reversing Sensors.... Useless - Be Warned!
Studio RSR
Post Reply
 
Thread Tools Search this Thread
      01-08-2013, 02:54 AM   #45
Spacebug
Second Lieutenant
Spacebug's Avatar
United Kingdom
36
Rep
221
Posts

Drives: 2013 F31 320D M Sport
Join Date: Aug 2012
Location: Sussex, UK

iTrader: (0)

Quote:
Originally Posted by zofinger View Post
Couple of thoughts 1) if it helps you can adjust the volume of the PDCs so they're not quite so 'overbearing' and 2) this if the first time i've had PDC's so have no experience to lean on, but the manual does note the sensors functionality could be impacted if they are dirty? Wonder if this was part blame for not seeing that huge post...
I think you may be on to something! As you can see from the pictures, my car was pretty dirty.

It could also be a factor in why the front sensors work better than the rears...

I should
__________________
Current: 2017 F10 530D, M Sport Plus, Graphite Grey, 19", HK, ProNav, HUD, Digital Dash
Previous: 2014 F10 525D, M Sport Plus, Carbon Black, 19's, ProNav, HK
2013 F31 320D MSport, 2013 F30 320D MSport, E91 320D MSport, 2002 E46 320i Vert, 1998 Lotus Elise 111S
Appreciate 0
      01-08-2013, 03:39 AM   #46
RobUK
Brigadier General
RobUK's Avatar
No_Country
2809
Rep
4,934
Posts

Drives: 340i MPPSK
Join Date: Jun 2012
Location: Sussex, N.Yorks, UK

iTrader: (0)

Garage List
My rear sensors 'dance' when they're spotlessly clean
__________________

Life is a state of mind
Appreciate 0
      01-08-2013, 06:38 AM   #47
rich1068
has left the building
United Kingdom
90
Rep
3,359
Posts

Drives: F30 330d M Sport
Join Date: Oct 2010
Location: UK

iTrader: (0)

Slightly off topic but I find the front sensors very handy. I don't know what is with this car but I find the front very difficult to judge. Without the sensors I think I'm right up against something and I'm miles off.
Appreciate 0
      01-08-2013, 08:43 AM   #48
zofinger
Major
zofinger's Avatar
England
319
Rep
1,091
Posts

Drives: F30 335d MSport
Join Date: Jan 2013
Location: England

iTrader: (0)

Quote:
Originally Posted by rich1068 View Post
Slightly off topic but I find the front sensors very handy. I don't know what is with this car but I find the front very difficult to judge. Without the sensors I think I'm right up against something and I'm miles off.
Agreed - only done 800 miles so it's all still new to me but the front feels closer to the obstacle than it actually is.
Appreciate 0
      01-09-2013, 05:59 AM   #49
Spacebug
Second Lieutenant
Spacebug's Avatar
United Kingdom
36
Rep
221
Posts

Drives: 2013 F31 320D M Sport
Join Date: Aug 2012
Location: Sussex, UK

iTrader: (0)

Quote:
Originally Posted by zofinger View Post
Agreed - only done 800 miles so it's all still new to me but the front feels closer to the obstacle than it actually is.
Yep me too... Usually very good at judging distances etc..
__________________
Current: 2017 F10 530D, M Sport Plus, Graphite Grey, 19", HK, ProNav, HUD, Digital Dash
Previous: 2014 F10 525D, M Sport Plus, Carbon Black, 19's, ProNav, HK
2013 F31 320D MSport, 2013 F30 320D MSport, E91 320D MSport, 2002 E46 320i Vert, 1998 Lotus Elise 111S
Appreciate 0
      01-10-2013, 08:39 AM   #50
Signpost
Enlisted Member
14
Rep
44
Posts

Drives: G30 520d SE Saloon
Join Date: Jan 2012
Location: Hampshire

iTrader: (0)

Having looked at the photograph of the offending wooden post and the advice contained on Page 118 of the Owner`s Handbook, warning of the limits of ultrasound measurement, including a thin or wedge shaped objects, the following thought may be relevant.

Could it be that almost all of the Ultrasound beam was reflected away from and not received back by the relevant sensor, due to the shape of the post. That would mean that on its own, the thin leading edge of the post was borderline in respect of the signal strength received back by the sensor.

I am not sure how Ultrasound works compared with Radar but assuming similarites, military Stealth Aircraft and Ships produce a very small radar return, partly based on the the special angled shape of the bodywork. This may or may not help to support the above theory.

Standing by to be shot down by experts!!
Appreciate 0
      01-10-2013, 09:07 AM   #51
rich1068
has left the building
United Kingdom
90
Rep
3,359
Posts

Drives: F30 330d M Sport
Join Date: Oct 2010
Location: UK

iTrader: (0)

You sound like you know what you're talking about. That's good enough for me!
Appreciate 0
      01-10-2013, 09:27 AM   #52
Spacebug
Second Lieutenant
Spacebug's Avatar
United Kingdom
36
Rep
221
Posts

Drives: 2013 F31 320D M Sport
Join Date: Aug 2012
Location: Sussex, UK

iTrader: (0)

Quote:
Originally Posted by Signpost View Post
Having looked at the photograph of the offending wooden post and the advice contained on Page 118 of the Owner`s Handbook, warning of the limits of ultrasound measurement, including a thin or wedge shaped objects, the following thought may be relevant.

Could it be that almost all of the Ultrasound beam was reflected away from and not received back by the relevant sensor, due to the shape of the post. That would mean that on its own, the thin leading edge of the post was borderline in respect of the signal strength received back by the sensor.

I am not sure how Ultrasound works compared with Radar but assuming similarites, military Stealth Aircraft and Ships produce a very small radar return, partly based on the the special angled shape of the bodywork. This may or may not help to support the above theory.

Standing by to be shot down by experts!!
Ah 'Stealth Post fools BMW Technology'... I think you may be on to something! Good analysis!

Quote:
Originally Posted by Signpost View Post
Standing by to be shot down by experts!!
You'll be OK if you hide behind a post..
__________________
Current: 2017 F10 530D, M Sport Plus, Graphite Grey, 19", HK, ProNav, HUD, Digital Dash
Previous: 2014 F10 525D, M Sport Plus, Carbon Black, 19's, ProNav, HK
2013 F31 320D MSport, 2013 F30 320D MSport, E91 320D MSport, 2002 E46 320i Vert, 1998 Lotus Elise 111S
Appreciate 0
      02-03-2013, 12:14 PM   #53
RamboGrambo
New Member
RamboGrambo's Avatar
9
Rep
15
Posts

Drives: 2015 F30 335d xDrive M Sport
Join Date: Feb 2013
Location: Newcastle

iTrader: (0)

I added the rear camera, for a little extra reassurance.
Appreciate 0
      02-03-2013, 05:32 PM   #54
Redbaron1973
Second Lieutenant
Redbaron1973's Avatar
United Kingdom
39
Rep
219
Posts

Drives: F82 M4 and G02 X4
Join Date: Sep 2011
Location: UK

iTrader: (0)

The sensors on my F30 hire car are ok.. seem reasonably accurate.
__________________
Cheers, Paul

__________________________________________________ ________________

G02 X4 MSport X - Carbon Black w Black / Comfort Pack / Tech Pack / Privacy
Appreciate 0
      02-03-2013, 06:17 PM   #55
claykin
Brigadier General
United_States
1579
Rep
4,546
Posts

Drives: various BMW
Join Date: Nov 2009
Location: Florida

iTrader: (0)

Quote:
Originally Posted by RamboGrambo View Post
I added the rear camera, for a little extra reassurance.
"added" as in retrofit? Do tell us more, please.
Appreciate 0
      02-04-2013, 01:56 AM   #56
RobUK
Brigadier General
RobUK's Avatar
No_Country
2809
Rep
4,934
Posts

Drives: 340i MPPSK
Join Date: Jun 2012
Location: Sussex, N.Yorks, UK

iTrader: (0)

Garage List
Quote:
Originally Posted by claykin View Post
"added" as in retrofit? Do tell us more, please.
Here's one option - http://www.bimmer-tech.net/shop/bmw-...sist-retrofits
__________________

Life is a state of mind
Appreciate 0
      02-04-2013, 01:59 AM   #57
RamboGrambo
New Member
RamboGrambo's Avatar
9
Rep
15
Posts

Drives: 2015 F30 335d xDrive M Sport
Join Date: Feb 2013
Location: Newcastle

iTrader: (0)

Quote:
Originally Posted by claykin View Post
"added" as in retrofit? Do tell us more, please.
Sorry it was a factory fitted option.
Appreciate 0
      02-04-2013, 01:05 PM   #58
Sweeper
Second Lieutenant
Latvia
31
Rep
218
Posts

Drives: F10 , R8 , F30 M
Join Date: Feb 2010
Location: Europe

iTrader: (0)

Just a note. Its sometimes 0C sometime -10C and rear sensors are acting damn strange . Even with clean car , with no ice or snow or dirt on them. Sometimes 1 or all together show full coverage (as something is fully in contact)

Damn bmw
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 09:55 AM.




f30post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST